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<?php
/**
 * WP_Classic_To_Block_Menu_Converter class
 *
 * @package WordPress
 * @since 6.3.0
 */

/**
 * Converts a Classic Menu to Block Menu blocks.
 *
 * @since 6.3.0
 */
class WP_Classic_To_Block_Menu_Converter {

	/**
	 * Converts a Classic Menu to blocks.
	 *
	 * @since 6.3.0
	 *
	 * @param WP_Term $menu The Menu term object of the menu to convert.
	 * @return string|WP_Error The serialized and normalized parsed blocks on success,
	 *                         an empty string when there are no menus to convert,
	 *                         or WP_Error on invalid menu.
	 */
	public static function convert( $menu ) {

		if ( ! is_nav_menu( $menu ) ) {
			return new WP_Error(
				'invalid_menu',
				__( 'The menu provided is not a valid menu.' )
			);
		}

		$menu_items = wp_get_nav_menu_items( $menu->term_id, array( 'update_post_term_cache' => false ) );

		if ( empty( $menu_items ) ) {
			return '';
		}

		// Set up the $menu_item variables.
		// Adds the class property classes for the current context, if applicable.
		_wp_menu_item_classes_by_context( $menu_items );

		$menu_items_by_parent_id = static::group_by_parent_id( $menu_items );

		$first_menu_item = isset( $menu_items_by_parent_id[0] )
			? $menu_items_by_parent_id[0]
			: array();

		$inner_blocks = static::to_blocks(
			$first_menu_item,
			$menu_items_by_parent_id
		);

		return serialize_blocks( $inner_blocks );
	}

	/**
	 * Returns an array of menu items grouped by the id of the parent menu item.
	 *
	 * @since 6.3.0
	 *
	 * @param array $menu_items An array of menu items.
	 * @return array
	 */
	private static function group_by_parent_id( $menu_items ) {
		$menu_items_by_parent_id = array();

		foreach ( $menu_items as $menu_item ) {
			$menu_items_by_parent_id[ $menu_item->menu_item_parent ][] = $menu_item;
		}

		return $menu_items_by_parent_id;
	}

	/**
	 * Turns menu item data into a nested array of parsed blocks
	 *
	 * @since 6.3.0
	 *
	 * @param array $menu_items              An array of menu items that represent
	 *                                       an individual level of a menu.
	 * @param array $menu_items_by_parent_id An array keyed by the id of the
	 *                                       parent menu where each element is an
	 *                                       array of menu items that belong to
	 *                                       that parent.
	 * @return array An array of parsed block data.
	 */
	private static function to_blocks( $menu_items, $menu_items_by_parent_id ) {

		if ( empty( $menu_items ) ) {
			return array();
		}

		$blocks = array();

		foreach ( $menu_items as $menu_item ) {
			$class_name       = ! empty( $menu_item->classes ) ? implode( ' ', (array) $menu_item->classes ) : null;
			$id               = ( null !== $menu_item->object_id && 'custom' !== $menu_item->object ) ? $menu_item->object_id : null;
			$opens_in_new_tab = null !== $menu_item->target && '_blank' === $menu_item->target;
			$rel              = ( null !== $menu_item->xfn && '' !== $menu_item->xfn ) ? $menu_item->xfn : null;
			$kind             = null !== $menu_item->type ? str_replace( '_', '-', $menu_item->type ) : 'custom';

			$block = array(
				'blockName' => isset( $menu_items_by_parent_id[ $menu_item->ID ] ) ? 'core/navigation-submenu' : 'core/navigation-link',
				'attrs'     => array(
					'className'     => $class_name,
					'description'   => $menu_item->description,
					'id'            => $id,
					'kind'          => $kind,
					'label'         => $menu_item->title,
					'opensInNewTab' => $opens_in_new_tab,
					'rel'           => $rel,
					'title'         => $menu_item->attr_title,
					'type'          => $menu_item->object,
					'url'           => $menu_item->url,
				),
			);

			$block['innerBlocks']  = isset( $menu_items_by_parent_id[ $menu_item->ID ] )
			? static::to_blocks( $menu_items_by_parent_id[ $menu_item->ID ], $menu_items_by_parent_id )
			: array();
			$block['innerContent'] = array_map( 'serialize_block', $block['innerBlocks'] );

			$blocks[] = $block;
		}

		return $blocks;
	}
}
<?php
/**
 * Locale API: WP_Locale class
 *
 * @package WordPress
 * @subpackage i18n
 * @since 4.6.0
 */

/**
 * Core class used to store translated data for a locale.
 *
 * @since 2.1.0
 * @since 4.6.0 Moved to its own file from wp-includes/locale.php.
 */
#[AllowDynamicProperties]
class WP_Locale {
	/**
	 * Stores the translated strings for the full weekday names.
	 *
	 * @since 2.1.0
	 * @since 6.2.0 Initialized to an empty array.
	 * @var string[]
	 */
	public $weekday = array();

	/**
	 * Stores the translated strings for the one character weekday names.
	 *
	 * There is a hack to make sure that Tuesday and Thursday, as well
	 * as Sunday and Saturday, don't conflict. See init() method for more.
	 *
	 * @see WP_Locale::init() for how to handle the hack.
	 *
	 * @since 2.1.0
	 * @since 6.2.0 Initialized to an empty array.
	 * @var string[]
	 */
	public $weekday_initial = array();

	/**
	 * Stores the translated strings for the abbreviated weekday names.
	 *
	 * @since 2.1.0
	 * @since 6.2.0 Initialized to an empty array.
	 * @var string[]
	 */
	public $weekday_abbrev = array();

	/**
	 * Stores the translated strings for the full month names.
	 *
	 * @since 2.1.0
	 * @since 6.2.0 Initialized to an empty array.
	 * @var string[]
	 */
	public $month = array();

	/**
	 * Stores the translated strings for the month names in genitive case, if the locale specifies.
	 *
	 * @since 4.4.0
	 * @since 6.2.0 Initialized to an empty array.
	 * @var string[]
	 */
	public $month_genitive = array();

	/**
	 * Stores the translated strings for the abbreviated month names.
	 *
	 * @since 2.1.0
	 * @since 6.2.0 Initialized to an empty array.
	 * @var string[]
	 */
	public $month_abbrev = array();

	/**
	 * Stores the translated strings for 'am' and 'pm'.
	 *
	 * Also the capitalized versions.
	 *
	 * @since 2.1.0
	 * @since 6.2.0 Initialized to an empty array.
	 * @var string[]
	 */
	public $meridiem = array();

	/**
	 * The text direction of the locale language.
	 *
	 * Default is left to right 'ltr'.
	 *
	 * @since 2.1.0
	 * @var string
	 */
	public $text_direction = 'ltr';

	/**
	 * The thousands separator and decimal point values used for localizing numbers.
	 *
	 * @since 2.3.0
	 * @since 6.2.0 Initialized to an empty array.
	 * @var array
	 */
	public $number_format = array();

	/**
	 * The separator string used for localizing list item separator.
	 *
	 * @since 6.0.0
	 * @var string
	 */
	public $list_item_separator;

	/**
	 * The word count type of the locale language.
	 *
	 * Default is 'words'.
	 *
	 * @since 6.2.0
	 * @var string
	 */
	public $word_count_type;

	/**
	 * Constructor which calls helper methods to set up object variables.
	 *
	 * @since 2.1.0
	 */
	public function __construct() {
		$this->init();
		$this->register_globals();
	}

	/**
	 * Sets up the translated strings and object properties.
	 *
	 * The method creates the translatable strings for various
	 * calendar elements. Which allows for specifying locale
	 * specific calendar names and text direction.
	 *
	 * @since 2.1.0
	 *
	 * @global string $text_direction
	 */
	public function init() {
		// The weekdays.
		$this->weekday[0] = /* translators: Weekday. */ __( 'Sunday' );
		$this->weekday[1] = /* translators: Weekday. */ __( 'Monday' );
		$this->weekday[2] = /* translators: Weekday. */ __( 'Tuesday' );
		$this->weekday[3] = /* translators: Weekday. */ __( 'Wednesday' );
		$this->weekday[4] = /* translators: Weekday. */ __( 'Thursday' );
		$this->weekday[5] = /* translators: Weekday. */ __( 'Friday' );
		$this->weekday[6] = /* translators: Weekday. */ __( 'Saturday' );

		// The first letter of each day.
		$this->weekday_initial[ $this->weekday[0] ] = /* translators: One-letter abbreviation of the weekday. */ _x( 'S', 'Sunday initial' );
		$this->weekday_initial[ $this->weekday[1] ] = /* translators: One-letter abbreviation of the weekday. */ _x( 'M', 'Monday initial' );
		$this->weekday_initial[ $this->weekday[2] ] = /* translators: One-letter abbreviation of the weekday. */ _x( 'T', 'Tuesday initial' );
		$this->weekday_initial[ $this->weekday[3] ] = /* translators: One-letter abbreviation of the weekday. */ _x( 'W', 'Wednesday initial' );
		$this->weekday_initial[ $this->weekday[4] ] = /* translators: One-letter abbreviation of the weekday. */ _x( 'T', 'Thursday initial' );
		$this->weekday_initial[ $this->weekday[5] ] = /* translators: One-letter abbreviation of the weekday. */ _x( 'F', 'Friday initial' );
		$this->weekday_initial[ $this->weekday[6] ] = /* translators: One-letter abbreviation of the weekday. */ _x( 'S', 'Saturday initial' );

		// Abbreviations for each day.
		$this->weekday_abbrev[ $this->weekday[0] ] = /* translators: Three-letter abbreviation of the weekday. */ __( 'Sun' );
		$this->weekday_abbrev[ $this->weekday[1] ] = /* translators: Three-letter abbreviation of the weekday. */ __( 'Mon' );
		$this->weekday_abbrev[ $this->weekday[2] ] = /* translators: Three-letter abbreviation of the weekday. */ __( 'Tue' );
		$this->weekday_abbrev[ $this->weekday[3] ] = /* translators: Three-letter abbreviation of the weekday. */ __( 'Wed' );
		$this->weekday_abbrev[ $this->weekday[4] ] = /* translators: Three-letter abbreviation of the weekday. */ __( 'Thu' );
		$this->weekday_abbrev[ $this->weekday[5] ] = /* translators: Three-letter abbreviation of the weekday. */ __( 'Fri' );
		$this->weekday_abbrev[ $this->weekday[6] ] = /* translators: Three-letter abbreviation of the weekday. */ __( 'Sat' );

		// The months.
		$this->month['01'] = /* translators: Month name. */ __( 'January' );
		$this->month['02'] = /* translators: Month name. */ __( 'February' );
		$this->month['03'] = /* translators: Month name. */ __( 'March' );
		$this->month['04'] = /* translators: Month name. */ __( 'April' );
		$this->month['05'] = /* translators: Month name. */ __( 'May' );
		$this->month['06'] = /* translators: Month name. */ __( 'June' );
		$this->month['07'] = /* translators: Month name. */ __( 'July' );
		$this->month['08'] = /* translators: Month name. */ __( 'August' );
		$this->month['09'] = /* translators: Month name. */ __( 'September' );
		$this->month['10'] = /* translators: Month name. */ __( 'October' );
		$this->month['11'] = /* translators: Month name. */ __( 'November' );
		$this->month['12'] = /* translators: Month name. */ __( 'December' );

		// The months, genitive.
		$this->month_genitive['01'] = /* translators: Month name, genitive. */ _x( 'January', 'genitive' );
		$this->month_genitive['02'] = /* translators: Month name, genitive. */ _x( 'February', 'genitive' );
		$this->month_genitive['03'] = /* translators: Month name, genitive. */ _x( 'March', 'genitive' );
		$this->month_genitive['04'] = /* translators: Month name, genitive. */ _x( 'April', 'genitive' );
		$this->month_genitive['05'] = /* translators: Month name, genitive. */ _x( 'May', 'genitive' );
		$this->month_genitive['06'] = /* translators: Month name, genitive. */ _x( 'June', 'genitive' );
		$this->month_genitive['07'] = /* translators: Month name, genitive. */ _x( 'July', 'genitive' );
		$this->month_genitive['08'] = /* translators: Month name, genitive. */ _x( 'August', 'genitive' );
		$this->month_genitive['09'] = /* translators: Month name, genitive. */ _x( 'September', 'genitive' );
		$this->month_genitive['10'] = /* translators: Month name, genitive. */ _x( 'October', 'genitive' );
		$this->month_genitive['11'] = /* translators: Month name, genitive. */ _x( 'November', 'genitive' );
		$this->month_genitive['12'] = /* translators: Month name, genitive. */ _x( 'December', 'genitive' );

		// Abbreviations for each month.
		$this->month_abbrev[ $this->month['01'] ] = /* translators: Three-letter abbreviation of the month. */ _x( 'Jan', 'January abbreviation' );
		$this->month_abbrev[ $this->month['02'] ] = /* translators: Three-letter abbreviation of the month. */ _x( 'Feb', 'February abbreviation' );
		$this->month_abbrev[ $this->month['03'] ] = /* translators: Three-letter abbreviation of the month. */ _x( 'Mar', 'March abbreviation' );
		$this->month_abbrev[ $this->month['04'] ] = /* translators: Three-letter abbreviation of the month. */ _x( 'Apr', 'April abbreviation' );
		$this->month_abbrev[ $this->month['05'] ] = /* translators: Three-letter abbreviation of the month. */ _x( 'May', 'May abbreviation' );
		$this->month_abbrev[ $this->month['06'] ] = /* translators: Three-letter abbreviation of the month. */ _x( 'Jun', 'June abbreviation' );
		$this->month_abbrev[ $this->month['07'] ] = /* translators: Three-letter abbreviation of the month. */ _x( 'Jul', 'July abbreviation' );
		$this->month_abbrev[ $this->month['08'] ] = /* translators: Three-letter abbreviation of the month. */ _x( 'Aug', 'August abbreviation' );
		$this->month_abbrev[ $this->month['09'] ] = /* translators: Three-letter abbreviation of the month. */ _x( 'Sep', 'September abbreviation' );
		$this->month_abbrev[ $this->month['10'] ] = /* translators: Three-letter abbreviation of the month. */ _x( 'Oct', 'October abbreviation' );
		$this->month_abbrev[ $this->month['11'] ] = /* translators: Three-letter abbreviation of the month. */ _x( 'Nov', 'November abbreviation' );
		$this->month_abbrev[ $this->month['12'] ] = /* translators: Three-letter abbreviation of the month. */ _x( 'Dec', 'December abbreviation' );

		// The meridiems.
		$this->meridiem['am'] = __( 'am' );
		$this->meridiem['pm'] = __( 'pm' );
		$this->meridiem['AM'] = __( 'AM' );
		$this->meridiem['PM'] = __( 'PM' );

		/*
		 * Numbers formatting.
		 * See https://www.php.net/number_format
		 */

		/* translators: $thousands_sep argument for https://www.php.net/number_format, default is ',' */
		$thousands_sep = __( 'number_format_thousands_sep' );

		// Replace space with a non-breaking space to avoid wrapping.
		$thousands_sep = str_replace( ' ', '&nbsp;', $thousands_sep );

		$this->number_format['thousands_sep'] = ( 'number_format_thousands_sep' === $thousands_sep ) ? ',' : $thousands_sep;

		/* translators: $dec_point argument for https://www.php.net/number_format, default is '.' */
		$decimal_point = __( 'number_format_decimal_point' );

		$this->number_format['decimal_point'] = ( 'number_format_decimal_point' === $decimal_point ) ? '.' : $decimal_point;

		/* translators: Used between list items, there is a space after the comma. */
		$this->list_item_separator = __( ', ' );

		// Set text direction.
		if ( isset( $GLOBALS['text_direction'] ) ) {
			$this->text_direction = $GLOBALS['text_direction'];

			/* translators: 'rtl' or 'ltr'. This sets the text direction for WordPress. */
		} elseif ( 'rtl' === _x( 'ltr', 'text direction' ) ) {
			$this->text_direction = 'rtl';
		}

		// Set the word count type.
		$this->word_count_type = $this->get_word_count_type();
	}

	/**
	 * Retrieves the full translated weekday word.
	 *
	 * Week starts on translated Sunday and can be fetched
	 * by using 0 (zero). So the week starts with 0 (zero)
	 * and ends on Saturday with is fetched by using 6 (six).
	 *
	 * @since 2.1.0
	 *
	 * @param int $weekday_number 0 for Sunday through 6 Saturday.
	 * @return string Full translated weekday.
	 */
	public function get_weekday( $weekday_number ) {
		return $this->weekday[ $weekday_number ];
	}

	/**
	 * Retrieves the translated weekday initial.
	 *
	 * The weekday initial is retrieved by the translated
	 * full weekday word. When translating the weekday initial
	 * pay attention to make sure that the starting letter does
	 * not conflict.
	 *
	 * @since 2.1.0
	 *
	 * @param string $weekday_name Full translated weekday word.
	 * @return string Translated weekday initial.
	 */
	public function get_weekday_initial( $weekday_name ) {
		return $this->weekday_initial[ $weekday_name ];
	}

	/**
	 * Retrieves the translated weekday abbreviation.
	 *
	 * The weekday abbreviation is retrieved by the translated
	 * full weekday word.
	 *
	 * @since 2.1.0
	 *
	 * @param string $weekday_name Full translated weekday word.
	 * @return string Translated weekday abbreviation.
	 */
	public function get_weekday_abbrev( $weekday_name ) {
		return $this->weekday_abbrev[ $weekday_name ];
	}

	/**
	 * Retrieves the full translated month by month number.
	 *
	 * The $month_number parameter has to be a string
	 * because it must have the '0' in front of any number
	 * that is less than 10. Starts from '01' and ends at
	 * '12'.
	 *
	 * You can use an integer instead and it will add the
	 * '0' before the numbers less than 10 for you.
	 *
	 * @since 2.1.0
	 *
	 * @param string|int $month_number '01' through '12'.
	 * @return string Translated full month name. If the month number is not found, an empty string is returned.
	 */
	public function get_month( $month_number ) {
		$month_number = zeroise( $month_number, 2 );
		if ( ! isset( $this->month[ $month_number ] ) ) {
			return '';
		}
		return $this->month[ $month_number ];
	}

	/**
	 * Retrieves translated version of month abbreviation string.
	 *
	 * The $month_name parameter is expected to be the translated or
	 * translatable version of the month.
	 *
	 * @since 2.1.0
	 *
	 * @param string $month_name Translated month to get abbreviated version.
	 * @return string Translated abbreviated month.
	 */
	public function get_month_abbrev( $month_name ) {
		return $this->month_abbrev[ $month_name ];
	}

	/**
	 * Retrieves translated version of month genitive string.
	 *
	 * The $month_number parameter has to be a string
	 * because it must have the '0' in front of any number
	 * that is less than 10. Starts from '01' and ends at
	 * '12'.
	 *
	 * You can use an integer instead and it will add the
	 * '0' before the numbers less than 10 for you.
	 *
	 * @since 6.8.0
	 *
	 * @param string|int $month_number '01' through '12'.
	 * @return string Translated genitive month name.
	 */
	public function get_month_genitive( $month_number ) {
		return $this->month_genitive[ zeroise( $month_number, 2 ) ];
	}

	/**
	 * Retrieves translated version of meridiem string.
	 *
	 * The $meridiem parameter is expected to not be translated.
	 *
	 * @since 2.1.0
	 *
	 * @param string $meridiem Either 'am', 'pm', 'AM', or 'PM'. Not translated version.
	 * @return string Translated version
	 */
	public function get_meridiem( $meridiem ) {
		return $this->meridiem[ $meridiem ];
	}

	/**
	 * Global variables are deprecated.
	 *
	 * For backward compatibility only.
	 *
	 * @since 2.1.0
	 * @deprecated For backward compatibility only.
	 *
	 * @global array $weekday
	 * @global array $weekday_initial
	 * @global array $weekday_abbrev
	 * @global array $month
	 * @global array $month_abbrev
	 */
	public function register_globals() {
		$GLOBALS['weekday']         = $this->weekday;
		$GLOBALS['weekday_initial'] = $this->weekday_initial;
		$GLOBALS['weekday_abbrev']  = $this->weekday_abbrev;
		$GLOBALS['month']           = $this->month;
		$GLOBALS['month_abbrev']    = $this->month_abbrev;
	}

	/**
	 * Checks if current locale is RTL.
	 *
	 * @since 3.0.0
	 * @return bool Whether locale is RTL.
	 */
	public function is_rtl() {
		return 'rtl' === $this->text_direction;
	}

	/**
	 * Registers date/time format strings for general POT.
	 *
	 * Private, unused method to add some date/time formats translated
	 * on wp-admin/options-general.php to the general POT that would
	 * otherwise be added to the admin POT.
	 *
	 * @since 3.6.0
	 */
	public function _strings_for_pot() {
		/* translators: Localized date format, see https://www.php.net/manual/datetime.format.php */
		__( 'F j, Y' );
		/* translators: Localized time format, see https://www.php.net/manual/datetime.format.php */
		__( 'g:i a' );
		/* translators: Localized date and time format, see https://www.php.net/manual/datetime.format.php */
		__( 'F j, Y g:i a' );
	}

	/**
	 * Retrieves the localized list item separator.
	 *
	 * @since 6.0.0
	 *
	 * @return string Localized list item separator.
	 */
	public function get_list_item_separator() {
		return $this->list_item_separator;
	}

	/**
	 * Retrieves the localized word count type.
	 *
	 * @since 6.2.0
	 *
	 * @return string Localized word count type. Possible values are `characters_excluding_spaces`,
	 *                `characters_including_spaces`, or `words`. Defaults to `words`.
	 */
	public function get_word_count_type() {

		/*
		 * translators: If your word count is based on single characters (e.g. East Asian characters),
		 * enter 'characters_excluding_spaces' or 'characters_including_spaces'. Otherwise, enter 'words'.
		 * Do not translate into your own language.
		 */
		$word_count_type = is_null( $this->word_count_type ) ? _x( 'words', 'Word count type. Do not translate!' ) : $this->word_count_type;

		// Check for valid types.
		if ( 'characters_excluding_spaces' !== $word_count_type && 'characters_including_spaces' !== $word_count_type ) {
			// Defaults to 'words'.
			$word_count_type = 'words';
		}

		return $word_count_type;
	}
}
<?php
/**
 * Functions related to registering and parsing blocks.
 *
 * @package WordPress
 * @subpackage Blocks
 * @since 5.0.0
 */

/**
 * Removes the block asset's path prefix if provided.
 *
 * @since 5.5.0
 *
 * @param string $asset_handle_or_path Asset handle or prefixed path.
 * @return string Path without the prefix or the original value.
 */
function remove_block_asset_path_prefix( $asset_handle_or_path ) {
	$path_prefix = 'file:';
	if ( ! str_starts_with( $asset_handle_or_path, $path_prefix ) ) {
		return $asset_handle_or_path;
	}
	$path = substr(
		$asset_handle_or_path,
		strlen( $path_prefix )
	);
	if ( str_starts_with( $path, './' ) ) {
		$path = substr( $path, 2 );
	}
	return $path;
}

/**
 * Generates the name for an asset based on the name of the block
 * and the field name provided.
 *
 * @since 5.5.0
 * @since 6.1.0 Added `$index` parameter.
 * @since 6.5.0 Added support for `viewScriptModule` field.
 *
 * @param string $block_name Name of the block.
 * @param string $field_name Name of the metadata field.
 * @param int    $index      Optional. Index of the asset when multiple items passed.
 *                           Default 0.
 * @return string Generated asset name for the block's field.
 */
function generate_block_asset_handle( $block_name, $field_name, $index = 0 ) {
	if ( str_starts_with( $block_name, 'core/' ) ) {
		$asset_handle = str_replace( 'core/', 'wp-block-', $block_name );
		if ( str_starts_with( $field_name, 'editor' ) ) {
			$asset_handle .= '-editor';
		}
		if ( str_starts_with( $field_name, 'view' ) ) {
			$asset_handle .= '-view';
		}
		if ( str_ends_with( strtolower( $field_name ), 'scriptmodule' ) ) {
			$asset_handle .= '-script-module';
		}
		if ( $index > 0 ) {
			$asset_handle .= '-' . ( $index + 1 );
		}
		return $asset_handle;
	}

	$field_mappings = array(
		'editorScript'     => 'editor-script',
		'editorStyle'      => 'editor-style',
		'script'           => 'script',
		'style'            => 'style',
		'viewScript'       => 'view-script',
		'viewScriptModule' => 'view-script-module',
		'viewStyle'        => 'view-style',
	);
	$asset_handle   = str_replace( '/', '-', $block_name ) .
		'-' . $field_mappings[ $field_name ];
	if ( $index > 0 ) {
		$asset_handle .= '-' . ( $index + 1 );
	}
	return $asset_handle;
}

/**
 * Gets the URL to a block asset.
 *
 * @since 6.4.0
 *
 * @param string $path A normalized path to a block asset.
 * @return string|false The URL to the block asset or false on failure.
 */
function get_block_asset_url( $path ) {
	if ( empty( $path ) ) {
		return false;
	}

	// Path needs to be normalized to work in Windows env.
	static $wpinc_path_norm = '';
	if ( ! $wpinc_path_norm ) {
		$wpinc_path_norm = wp_normalize_path( realpath( ABSPATH . WPINC ) );
	}

	if ( str_starts_with( $path, $wpinc_path_norm ) ) {
		return includes_url( str_replace( $wpinc_path_norm, '', $path ) );
	}

	static $template_paths_norm = array();

	$template = get_template();
	if ( ! isset( $template_paths_norm[ $template ] ) ) {
		$template_paths_norm[ $template ] = wp_normalize_path( realpath( get_template_directory() ) );
	}

	if ( str_starts_with( $path, trailingslashit( $template_paths_norm[ $template ] ) ) ) {
		return get_theme_file_uri( str_replace( $template_paths_norm[ $template ], '', $path ) );
	}

	if ( is_child_theme() ) {
		$stylesheet = get_stylesheet();
		if ( ! isset( $template_paths_norm[ $stylesheet ] ) ) {
			$template_paths_norm[ $stylesheet ] = wp_normalize_path( realpath( get_stylesheet_directory() ) );
		}

		if ( str_starts_with( $path, trailingslashit( $template_paths_norm[ $stylesheet ] ) ) ) {
			return get_theme_file_uri( str_replace( $template_paths_norm[ $stylesheet ], '', $path ) );
		}
	}

	return plugins_url( basename( $path ), $path );
}

/**
 * Finds a script module ID for the selected block metadata field. It detects
 * when a path to file was provided and optionally finds a corresponding asset
 * file with details necessary to register the script module under with an
 * automatically generated module ID. It returns unprocessed script module
 * ID otherwise.
 *
 * @since 6.5.0
 *
 * @param array  $metadata   Block metadata.
 * @param string $field_name Field name to pick from metadata.
 * @param int    $index      Optional. Index of the script module ID to register when multiple
 *                           items passed. Default 0.
 * @return string|false Script module ID or false on failure.
 */
function register_block_script_module_id( $metadata, $field_name, $index = 0 ) {
	if ( empty( $metadata[ $field_name ] ) ) {
		return false;
	}

	$module_id = $metadata[ $field_name ];
	if ( is_array( $module_id ) ) {
		if ( empty( $module_id[ $index ] ) ) {
			return false;
		}
		$module_id = $module_id[ $index ];
	}

	$module_path = remove_block_asset_path_prefix( $module_id );
	if ( $module_id === $module_path ) {
		return $module_id;
	}

	$path                  = dirname( $metadata['file'] );
	$module_asset_raw_path = $path . '/' . substr_replace( $module_path, '.asset.php', - strlen( '.js' ) );
	$module_id             = generate_block_asset_handle( $metadata['name'], $field_name, $index );
	$module_asset_path     = wp_normalize_path(
		realpath( $module_asset_raw_path )
	);

	$module_path_norm = wp_normalize_path( realpath( $path . '/' . $module_path ) );
	$module_uri       = get_block_asset_url( $module_path_norm );

	$module_asset        = ! empty( $module_asset_path ) ? require $module_asset_path : array();
	$module_dependencies = isset( $module_asset['dependencies'] ) ? $module_asset['dependencies'] : array();
	$block_version       = isset( $metadata['version'] ) ? $metadata['version'] : false;
	$module_version      = isset( $module_asset['version'] ) ? $module_asset['version'] : $block_version;

	$supports_interactivity_true = isset( $metadata['supports']['interactivity'] ) && true === $metadata['supports']['interactivity'];
	$is_interactive              = $supports_interactivity_true || ( isset( $metadata['supports']['interactivity']['interactive'] ) && true === $metadata['supports']['interactivity']['interactive'] );
	$supports_client_navigation  = $supports_interactivity_true || ( isset( $metadata['supports']['interactivity']['clientNavigation'] ) && true === $metadata['supports']['interactivity']['clientNavigation'] );

	$args = array();

	// Blocks using the Interactivity API are server-side rendered, so they are
	// by design not in the critical rendering path and should be deprioritized.
	if ( $is_interactive ) {
		$args['fetchpriority'] = 'low';
		$args['in_footer']     = true;
	}

	// Blocks using the Interactivity API that support client-side navigation
	// must be marked as such in their script modules.
	if ( $is_interactive && $supports_client_navigation ) {
		wp_interactivity()->add_client_navigation_support_to_script_module( $module_id );
	}

	wp_register_script_module(
		$module_id,
		$module_uri,
		$module_dependencies,
		$module_version,
		$args
	);

	return $module_id;
}

/**
 * Finds a script handle for the selected block metadata field. It detects
 * when a path to file was provided and optionally finds a corresponding asset
 * file with details necessary to register the script under automatically
 * generated handle name. It returns unprocessed script handle otherwise.
 *
 * @since 5.5.0
 * @since 6.1.0 Added `$index` parameter.
 * @since 6.5.0 The asset file is optional. Added script handle support in the asset file.
 *
 * @param array  $metadata   Block metadata.
 * @param string $field_name Field name to pick from metadata.
 * @param int    $index      Optional. Index of the script to register when multiple items passed.
 *                           Default 0.
 * @return string|false Script handle provided directly or created through
 *                      script's registration, or false on failure.
 */
function register_block_script_handle( $metadata, $field_name, $index = 0 ) {
	if ( empty( $metadata[ $field_name ] ) ) {
		return false;
	}

	$script_handle_or_path = $metadata[ $field_name ];
	if ( is_array( $script_handle_or_path ) ) {
		if ( empty( $script_handle_or_path[ $index ] ) ) {
			return false;
		}
		$script_handle_or_path = $script_handle_or_path[ $index ];
	}

	$script_path = remove_block_asset_path_prefix( $script_handle_or_path );
	if ( $script_handle_or_path === $script_path ) {
		return $script_handle_or_path;
	}

	$path                  = dirname( $metadata['file'] );
	$script_asset_raw_path = $path . '/' . substr_replace( $script_path, '.asset.php', - strlen( '.js' ) );
	$script_asset_path     = wp_normalize_path(
		realpath( $script_asset_raw_path )
	);

	// Asset file for blocks is optional. See https://core.trac.wordpress.org/ticket/60460.
	$script_asset  = ! empty( $script_asset_path ) ? require $script_asset_path : array();
	$script_handle = isset( $script_asset['handle'] ) ?
		$script_asset['handle'] :
		generate_block_asset_handle( $metadata['name'], $field_name, $index );
	if ( wp_script_is( $script_handle, 'registered' ) ) {
		return $script_handle;
	}

	$script_path_norm    = wp_normalize_path( realpath( $path . '/' . $script_path ) );
	$script_uri          = get_block_asset_url( $script_path_norm );
	$script_dependencies = isset( $script_asset['dependencies'] ) ? $script_asset['dependencies'] : array();
	$block_version       = isset( $metadata['version'] ) ? $metadata['version'] : false;
	$script_version      = isset( $script_asset['version'] ) ? $script_asset['version'] : $block_version;
	$script_args         = array();
	if ( 'viewScript' === $field_name && $script_uri ) {
		$script_args['strategy'] = 'defer';
	}

	$result = wp_register_script(
		$script_handle,
		$script_uri,
		$script_dependencies,
		$script_version,
		$script_args
	);
	if ( ! $result ) {
		return false;
	}

	if ( ! empty( $metadata['textdomain'] ) && in_array( 'wp-i18n', $script_dependencies, true ) ) {
		wp_set_script_translations( $script_handle, $metadata['textdomain'] );
	}

	return $script_handle;
}

/**
 * Finds a style handle for the block metadata field. It detects when a path
 * to file was provided and registers the style under automatically
 * generated handle name. It returns unprocessed style handle otherwise.
 *
 * @since 5.5.0
 * @since 6.1.0 Added `$index` parameter.
 *
 * @param array  $metadata   Block metadata.
 * @param string $field_name Field name to pick from metadata.
 * @param int    $index      Optional. Index of the style to register when multiple items passed.
 *                           Default 0.
 * @return string|false Style handle provided directly or created through
 *                      style's registration, or false on failure.
 */
function register_block_style_handle( $metadata, $field_name, $index = 0 ) {
	if ( empty( $metadata[ $field_name ] ) ) {
		return false;
	}

	$style_handle = $metadata[ $field_name ];
	if ( is_array( $style_handle ) ) {
		if ( empty( $style_handle[ $index ] ) ) {
			return false;
		}
		$style_handle = $style_handle[ $index ];
	}

	$style_handle_name = generate_block_asset_handle( $metadata['name'], $field_name, $index );
	// If the style handle is already registered, skip re-registering.
	if ( wp_style_is( $style_handle_name, 'registered' ) ) {
		return $style_handle_name;
	}

	static $wpinc_path_norm = '';
	if ( ! $wpinc_path_norm ) {
		$wpinc_path_norm = wp_normalize_path( realpath( ABSPATH . WPINC ) );
	}

	$is_core_block = isset( $metadata['file'] ) && str_starts_with( $metadata['file'], $wpinc_path_norm );
	// Skip registering individual styles for each core block when a bundled version provided.
	if ( $is_core_block && ! wp_should_load_separate_core_block_assets() ) {
		return false;
	}

	$style_path      = remove_block_asset_path_prefix( $style_handle );
	$is_style_handle = $style_handle === $style_path;
	// Allow only passing style handles for core blocks.
	if ( $is_core_block && ! $is_style_handle ) {
		return false;
	}
	// Return the style handle unless it's the first item for every core block that requires special treatment.
	if ( $is_style_handle && ! ( $is_core_block && 0 === $index ) ) {
		return $style_handle;
	}

	// Check whether styles should have a ".min" suffix or not.
	$suffix = SCRIPT_DEBUG ? '' : '.min';
	if ( $is_core_block ) {
		$style_path = ( 'editorStyle' === $field_name ) ? "editor{$suffix}.css" : "style{$suffix}.css";
	}

	$style_path_norm = wp_normalize_path( realpath( dirname( $metadata['file'] ) . '/' . $style_path ) );
	$style_uri       = get_block_asset_url( $style_path_norm );

	$block_version = ! $is_core_block && isset( $metadata['version'] ) ? $metadata['version'] : false;
	$version       = $style_path_norm && defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? filemtime( $style_path_norm ) : $block_version;
	$result        = wp_register_style(
		$style_handle_name,
		$style_uri,
		array(),
		$version
	);
	if ( ! $result ) {
		return false;
	}

	if ( $style_uri ) {
		wp_style_add_data( $style_handle_name, 'path', $style_path_norm );

		if ( $is_core_block ) {
			$rtl_file = str_replace( "{$suffix}.css", "-rtl{$suffix}.css", $style_path_norm );
		} else {
			$rtl_file = str_replace( '.css', '-rtl.css', $style_path_norm );
		}

		if ( is_rtl() && file_exists( $rtl_file ) ) {
			wp_style_add_data( $style_handle_name, 'rtl', 'replace' );
			wp_style_add_data( $style_handle_name, 'suffix', $suffix );
			wp_style_add_data( $style_handle_name, 'path', $rtl_file );
		}
	}

	return $style_handle_name;
}

/**
 * Gets i18n schema for block's metadata read from `block.json` file.
 *
 * @since 5.9.0
 *
 * @return object The schema for block's metadata.
 */
function get_block_metadata_i18n_schema() {
	static $i18n_block_schema;

	if ( ! isset( $i18n_block_schema ) ) {
		$i18n_block_schema = wp_json_file_decode( __DIR__ . '/block-i18n.json' );
	}

	return $i18n_block_schema;
}

/**
 * Registers all block types from a block metadata collection.
 *
 * This can either reference a previously registered metadata collection or, if the `$manifest` parameter is provided,
 * register the metadata collection directly within the same function call.
 *
 * @since 6.8.0
 * @see wp_register_block_metadata_collection()
 * @see register_block_type_from_metadata()
 *
 * @param string $path     The absolute base path for the collection ( e.g., WP_PLUGIN_DIR . '/my-plugin/blocks/' ).
 * @param string $manifest Optional. The absolute path to the manifest file containing the metadata collection, in
 *                         order to register the collection. If this parameter is not provided, the `$path` parameter
 *                         must reference a previously registered block metadata collection.
 */
function wp_register_block_types_from_metadata_collection( $path, $manifest = '' ) {
	if ( $manifest ) {
		wp_register_block_metadata_collection( $path, $manifest );
	}

	$block_metadata_files = WP_Block_Metadata_Registry::get_collection_block_metadata_files( $path );
	foreach ( $block_metadata_files as $block_metadata_file ) {
		register_block_type_from_metadata( $block_metadata_file );
	}
}

/**
 * Registers a block metadata collection.
 *
 * This function allows core and third-party plugins to register their block metadata
 * collections in a centralized location. Registering collections can improve performance
 * by avoiding multiple reads from the filesystem and parsing JSON.
 *
 * @since 6.7.0
 *
 * @param string $path     The base path in which block files for the collection reside.
 * @param string $manifest The path to the manifest file for the collection.
 */
function wp_register_block_metadata_collection( $path, $manifest ) {
	WP_Block_Metadata_Registry::register_collection( $path, $manifest );
}

/**
 * Registers a block type from the metadata stored in the `block.json` file.
 *
 * @since 5.5.0
 * @since 5.7.0 Added support for `textdomain` field and i18n handling for all translatable fields.
 * @since 5.9.0 Added support for `variations` and `viewScript` fields.
 * @since 6.1.0 Added support for `render` field.
 * @since 6.3.0 Added `selectors` field.
 * @since 6.4.0 Added support for `blockHooks` field.
 * @since 6.5.0 Added support for `allowedBlocks`, `viewScriptModule`, and `viewStyle` fields.
 * @since 6.7.0 Allow PHP filename as `variations` argument.
 *
 * @param string $file_or_folder Path to the JSON file with metadata definition for
 *                               the block or path to the folder where the `block.json` file is located.
 *                               If providing the path to a JSON file, the filename must end with `block.json`.
 * @param array  $args           Optional. Array of block type arguments. Accepts any public property
 *                               of `WP_Block_Type`. See WP_Block_Type::__construct() for information
 *                               on accepted arguments. Default empty array.
 * @return WP_Block_Type|false The registered block type on success, or false on failure.
 */
function register_block_type_from_metadata( $file_or_folder, $args = array() ) {
	/*
	 * Get an array of metadata from a PHP file.
	 * This improves performance for core blocks as it's only necessary to read a single PHP file
	 * instead of reading a JSON file per-block, and then decoding from JSON to PHP.
	 * Using a static variable ensures that the metadata is only read once per request.
	 */

	$file_or_folder = wp_normalize_path( $file_or_folder );

	$metadata_file = ( ! str_ends_with( $file_or_folder, 'block.json' ) ) ?
		trailingslashit( $file_or_folder ) . 'block.json' :
		$file_or_folder;

	$is_core_block        = str_starts_with( $file_or_folder, wp_normalize_path( ABSPATH . WPINC ) );
	$metadata_file_exists = $is_core_block || file_exists( $metadata_file );
	$registry_metadata    = WP_Block_Metadata_Registry::get_metadata( $file_or_folder );

	if ( $registry_metadata ) {
		$metadata = $registry_metadata;
	} elseif ( $metadata_file_exists ) {
		$metadata = wp_json_file_decode( $metadata_file, array( 'associative' => true ) );
	} else {
		$metadata = array();
	}

	if ( ! is_array( $metadata ) || ( empty( $metadata['name'] ) && empty( $args['name'] ) ) ) {
		return false;
	}

	$metadata['file'] = $metadata_file_exists ? wp_normalize_path( realpath( $metadata_file ) ) : null;

	/**
	 * Filters the metadata provided for registering a block type.
	 *
	 * @since 5.7.0
	 *
	 * @param array $metadata Metadata for registering a block type.
	 */
	$metadata = apply_filters( 'block_type_metadata', $metadata );

	// Add `style` and `editor_style` for core blocks if missing.
	if ( ! empty( $metadata['name'] ) && str_starts_with( $metadata['name'], 'core/' ) ) {
		$block_name = str_replace( 'core/', '', $metadata['name'] );

		if ( ! isset( $metadata['style'] ) ) {
			$metadata['style'] = "wp-block-$block_name";
		}
		if ( current_theme_supports( 'wp-block-styles' ) && wp_should_load_separate_core_block_assets() ) {
			$metadata['style']   = (array) $metadata['style'];
			$metadata['style'][] = "wp-block-{$block_name}-theme";
		}
		if ( ! isset( $metadata['editorStyle'] ) ) {
			$metadata['editorStyle'] = "wp-block-{$block_name}-editor";
		}
	}

	$settings          = array();
	$property_mappings = array(
		'apiVersion'      => 'api_version',
		'name'            => 'name',
		'title'           => 'title',
		'category'        => 'category',
		'parent'          => 'parent',
		'ancestor'        => 'ancestor',
		'icon'            => 'icon',
		'description'     => 'description',
		'keywords'        => 'keywords',
		'attributes'      => 'attributes',
		'providesContext' => 'provides_context',
		'usesContext'     => 'uses_context',
		'selectors'       => 'selectors',
		'supports'        => 'supports',
		'styles'          => 'styles',
		'variations'      => 'variations',
		'example'         => 'example',
		'allowedBlocks'   => 'allowed_blocks',
	);
	$textdomain        = ! empty( $metadata['textdomain'] ) ? $metadata['textdomain'] : null;
	$i18n_schema       = get_block_metadata_i18n_schema();

	foreach ( $property_mappings as $key => $mapped_key ) {
		if ( isset( $metadata[ $key ] ) ) {
			$settings[ $mapped_key ] = $metadata[ $key ];
			if ( $metadata_file_exists && $textdomain && isset( $i18n_schema->$key ) ) {
				$settings[ $mapped_key ] = translate_settings_using_i18n_schema( $i18n_schema->$key, $settings[ $key ], $textdomain );
			}
		}
	}

	if ( ! empty( $metadata['render'] ) ) {
		$template_path = wp_normalize_path(
			realpath(
				dirname( $metadata['file'] ) . '/' .
				remove_block_asset_path_prefix( $metadata['render'] )
			)
		);
		if ( $template_path ) {
			/**
			 * Renders the block on the server.
			 *
			 * @since 6.1.0
			 *
			 * @param array    $attributes Block attributes.
			 * @param string   $content    Block default content.
			 * @param WP_Block $block      Block instance.
			 *
			 * @return string Returns the block content.
			 */
			$settings['render_callback'] = static function ( $attributes, $content, $block ) use ( $template_path ) {
				ob_start();
				require $template_path;
				return ob_get_clean();
			};
		}
	}

	// If `variations` is a string, it's the name of a PHP file that
	// generates the variations.
	if ( ! empty( $metadata['variations'] ) && is_string( $metadata['variations'] ) ) {
		$variations_path = wp_normalize_path(
			realpath(
				dirname( $metadata['file'] ) . '/' .
				remove_block_asset_path_prefix( $metadata['variations'] )
			)
		);
		if ( $variations_path ) {
			/**
			 * Generates the list of block variations.
			 *
			 * @since 6.7.0
			 *
			 * @return string Returns the list of block variations.
			 */
			$settings['variation_callback'] = static function () use ( $variations_path ) {
				$variations = require $variations_path;
				return $variations;
			};
			// The block instance's `variations` field is only allowed to be an array
			// (of known block variations). We unset it so that the block instance will
			// provide a getter that returns the result of the `variation_callback` instead.
			unset( $settings['variations'] );
		}
	}

	$settings = array_merge( $settings, $args );

	$script_fields = array(
		'editorScript' => 'editor_script_handles',
		'script'       => 'script_handles',
		'viewScript'   => 'view_script_handles',
	);
	foreach ( $script_fields as $metadata_field_name => $settings_field_name ) {
		if ( ! empty( $settings[ $metadata_field_name ] ) ) {
			$metadata[ $metadata_field_name ] = $settings[ $metadata_field_name ];
		}
		if ( ! empty( $metadata[ $metadata_field_name ] ) ) {
			$scripts           = $metadata[ $metadata_field_name ];
			$processed_scripts = array();
			if ( is_array( $scripts ) ) {
				for ( $index = 0; $index < count( $scripts ); $index++ ) {
					$result = register_block_script_handle(
						$metadata,
						$metadata_field_name,
						$index
					);
					if ( $result ) {
						$processed_scripts[] = $result;
					}
				}
			} else {
				$result = register_block_script_handle(
					$metadata,
					$metadata_field_name
				);
				if ( $result ) {
					$processed_scripts[] = $result;
				}
			}
			$settings[ $settings_field_name ] = $processed_scripts;
		}
	}

	$module_fields = array(
		'viewScriptModule' => 'view_script_module_ids',
	);
	foreach ( $module_fields as $metadata_field_name => $settings_field_name ) {
		if ( ! empty( $settings[ $metadata_field_name ] ) ) {
			$metadata[ $metadata_field_name ] = $settings[ $metadata_field_name ];
		}
		if ( ! empty( $metadata[ $metadata_field_name ] ) ) {
			$modules           = $metadata[ $metadata_field_name ];
			$processed_modules = array();
			if ( is_array( $modules ) ) {
				for ( $index = 0; $index < count( $modules ); $index++ ) {
					$result = register_block_script_module_id(
						$metadata,
						$metadata_field_name,
						$index
					);
					if ( $result ) {
						$processed_modules[] = $result;
					}
				}
			} else {
				$result = register_block_script_module_id(
					$metadata,
					$metadata_field_name
				);
				if ( $result ) {
					$processed_modules[] = $result;
				}
			}
			$settings[ $settings_field_name ] = $processed_modules;
		}
	}

	$style_fields = array(
		'editorStyle' => 'editor_style_handles',
		'style'       => 'style_handles',
		'viewStyle'   => 'view_style_handles',
	);
	foreach ( $style_fields as $metadata_field_name => $settings_field_name ) {
		if ( ! empty( $settings[ $metadata_field_name ] ) ) {
			$metadata[ $metadata_field_name ] = $settings[ $metadata_field_name ];
		}
		if ( ! empty( $metadata[ $metadata_field_name ] ) ) {
			$styles           = $metadata[ $metadata_field_name ];
			$processed_styles = array();
			if ( is_array( $styles ) ) {
				for ( $index = 0; $index < count( $styles ); $index++ ) {
					$result = register_block_style_handle(
						$metadata,
						$metadata_field_name,
						$index
					);
					if ( $result ) {
						$processed_styles[] = $result;
					}
				}
			} else {
				$result = register_block_style_handle(
					$metadata,
					$metadata_field_name
				);
				if ( $result ) {
					$processed_styles[] = $result;
				}
			}
			$settings[ $settings_field_name ] = $processed_styles;
		}
	}

	if ( ! empty( $metadata['blockHooks'] ) ) {
		/**
		 * Map camelCased position string (from block.json) to snake_cased block type position.
		 *
		 * @var array
		 */
		$position_mappings = array(
			'before'     => 'before',
			'after'      => 'after',
			'firstChild' => 'first_child',
			'lastChild'  => 'last_child',
		);

		$settings['block_hooks'] = array();
		foreach ( $metadata['blockHooks'] as $anchor_block_name => $position ) {
			// Avoid infinite recursion (hooking to itself).
			if ( $metadata['name'] === $anchor_block_name ) {
				_doing_it_wrong(
					__METHOD__,
					__( 'Cannot hook block to itself.' ),
					'6.4.0'
				);
				continue;
			}

			if ( ! isset( $position_mappings[ $position ] ) ) {
				continue;
			}

			$settings['block_hooks'][ $anchor_block_name ] = $position_mappings[ $position ];
		}
	}

	/**
	 * Filters the settings determined from the block type metadata.
	 *
	 * @since 5.7.0
	 *
	 * @param array $settings Array of determined settings for registering a block type.
	 * @param array $metadata Metadata provided for registering a block type.
	 */
	$settings = apply_filters( 'block_type_metadata_settings', $settings, $metadata );

	$metadata['name'] = ! empty( $settings['name'] ) ? $settings['name'] : $metadata['name'];

	return WP_Block_Type_Registry::get_instance()->register(
		$metadata['name'],
		$settings
	);
}

/**
 * Registers a block type. The recommended way is to register a block type using
 * the metadata stored in the `block.json` file.
 *
 * @since 5.0.0
 * @since 5.8.0 First parameter now accepts a path to the `block.json` file.
 *
 * @param string|WP_Block_Type $block_type Block type name including namespace, or alternatively
 *                                         a path to the JSON file with metadata definition for the block,
 *                                         or a path to the folder where the `block.json` file is located,
 *                                         or a complete WP_Block_Type instance.
 *                                         In case a WP_Block_Type is provided, the $args parameter will be ignored.
 * @param array                $args       Optional. Array of block type arguments. Accepts any public property
 *                                         of `WP_Block_Type`. See WP_Block_Type::__construct() for information
 *                                         on accepted arguments. Default empty array.
 *
 * @return WP_Block_Type|false The registered block type on success, or false on failure.
 */
function register_block_type( $block_type, $args = array() ) {
	if ( is_string( $block_type ) && file_exists( $block_type ) ) {
		return register_block_type_from_metadata( $block_type, $args );
	}

	return WP_Block_Type_Registry::get_instance()->register( $block_type, $args );
}

/**
 * Unregisters a block type.
 *
 * @since 5.0.0
 *
 * @param string|WP_Block_Type $name Block type name including namespace, or alternatively
 *                                   a complete WP_Block_Type instance.
 * @return WP_Block_Type|false The unregistered block type on success, or false on failure.
 */
function unregister_block_type( $name ) {
	return WP_Block_Type_Registry::get_instance()->unregister( $name );
}

/**
 * Determines whether a post or content string has blocks.
 *
 * This test optimizes for performance rather than strict accuracy, detecting
 * the pattern of a block but not validating its structure. For strict accuracy,
 * you should use the block parser on post content.
 *
 * @since 5.0.0
 *
 * @see parse_blocks()
 *
 * @param int|string|WP_Post|null $post Optional. Post content, post ID, or post object.
 *                                      Defaults to global $post.
 * @return bool Whether the post has blocks.
 */
function has_blocks( $post = null ) {
	if ( ! is_string( $post ) ) {
		$wp_post = get_post( $post );

		if ( ! $wp_post instanceof WP_Post ) {
			return false;
		}

		$post = $wp_post->post_content;
	}

	return str_contains( (string) $post, '<!-- wp:' );
}

/**
 * Determines whether a $post or a string contains a specific block type.
 *
 * This test optimizes for performance rather than strict accuracy, detecting
 * whether the block type exists but not validating its structure and not checking
 * synced patterns (formerly called reusable blocks). For strict accuracy,
 * you should use the block parser on post content.
 *
 * @since 5.0.0
 *
 * @see parse_blocks()
 *
 * @param string                  $block_name Full block type to look for.
 * @param int|string|WP_Post|null $post       Optional. Post content, post ID, or post object.
 *                                            Defaults to global $post.
 * @return bool Whether the post content contains the specified block.
 */
function has_block( $block_name, $post = null ) {
	if ( ! has_blocks( $post ) ) {
		return false;
	}

	if ( ! is_string( $post ) ) {
		$wp_post = get_post( $post );
		if ( $wp_post instanceof WP_Post ) {
			$post = $wp_post->post_content;
		}
	}

	/*
	 * Normalize block name to include namespace, if provided as non-namespaced.
	 * This matches behavior for WordPress 5.0.0 - 5.3.0 in matching blocks by
	 * their serialized names.
	 */
	if ( ! str_contains( $block_name, '/' ) ) {
		$block_name = 'core/' . $block_name;
	}

	// Test for existence of block by its fully qualified name.
	$has_block = str_contains( $post, '<!-- wp:' . $block_name . ' ' );

	if ( ! $has_block ) {
		/*
		 * If the given block name would serialize to a different name, test for
		 * existence by the serialized form.
		 */
		$serialized_block_name = strip_core_block_namespace( $block_name );
		if ( $serialized_block_name !== $block_name ) {
			$has_block = str_contains( $post, '<!-- wp:' . $serialized_block_name . ' ' );
		}
	}

	return $has_block;
}

/**
 * Returns an array of the names of all registered dynamic block types.
 *
 * @since 5.0.0
 *
 * @return string[] Array of dynamic block names.
 */
function get_dynamic_block_names() {
	$dynamic_block_names = array();

	$block_types = WP_Block_Type_Registry::get_instance()->get_all_registered();
	foreach ( $block_types as $block_type ) {
		if ( $block_type->is_dynamic() ) {
			$dynamic_block_names[] = $block_type->name;
		}
	}

	return $dynamic_block_names;
}

/**
 * Retrieves block types hooked into the given block, grouped by anchor block type and the relative position.
 *
 * @since 6.4.0
 *
 * @return array[] Array of block types grouped by anchor block type and the relative position.
 */
function get_hooked_blocks() {
	$block_types   = WP_Block_Type_Registry::get_instance()->get_all_registered();
	$hooked_blocks = array();
	foreach ( $block_types as $block_type ) {
		if ( ! ( $block_type instanceof WP_Block_Type ) || ! is_array( $block_type->block_hooks ) ) {
			continue;
		}
		foreach ( $block_type->block_hooks as $anchor_block_type => $relative_position ) {
			if ( ! isset( $hooked_blocks[ $anchor_block_type ] ) ) {
				$hooked_blocks[ $anchor_block_type ] = array();
			}
			if ( ! isset( $hooked_blocks[ $anchor_block_type ][ $relative_position ] ) ) {
				$hooked_blocks[ $anchor_block_type ][ $relative_position ] = array();
			}
			$hooked_blocks[ $anchor_block_type ][ $relative_position ][] = $block_type->name;
		}
	}

	return $hooked_blocks;
}

/**
 * Returns the markup for blocks hooked to the given anchor block in a specific relative position.
 *
 * @since 6.5.0
 * @access private
 *
 * @param array                           $parsed_anchor_block The anchor block, in parsed block array format.
 * @param string                          $relative_position   The relative position of the hooked blocks.
 *                                                             Can be one of 'before', 'after', 'first_child', or 'last_child'.
 * @param array                           $hooked_blocks       An array of hooked block types, grouped by anchor block and relative position.
 * @param WP_Block_Template|WP_Post|array $context             The block template, template part, or pattern that the anchor block belongs to.
 * @return string
 */
function insert_hooked_blocks( &$parsed_anchor_block, $relative_position, $hooked_blocks, $context ) {
	$anchor_block_type  = $parsed_anchor_block['blockName'];
	$hooked_block_types = isset( $anchor_block_type, $hooked_blocks[ $anchor_block_type ][ $relative_position ] )
		? $hooked_blocks[ $anchor_block_type ][ $relative_position ]
		: array();

	/**
	 * Filters the list of hooked block types for a given anchor block type and relative position.
	 *
	 * @since 6.4.0
	 *
	 * @param string[]                        $hooked_block_types The list of hooked block types.
	 * @param string                          $relative_position  The relative position of the hooked blocks.
	 *                                                            Can be one of 'before', 'after', 'first_child', or 'last_child'.
	 * @param string                          $anchor_block_type  The anchor block type.
	 * @param WP_Block_Template|WP_Post|array $context            The block template, template part, post object,
	 *                                                            or pattern that the anchor block belongs to.
	 */
	$hooked_block_types = apply_filters( 'hooked_block_types', $hooked_block_types, $relative_position, $anchor_block_type, $context );

	$markup = '';
	foreach ( $hooked_block_types as $hooked_block_type ) {
		$parsed_hooked_block = array(
			'blockName'    => $hooked_block_type,
			'attrs'        => array(),
			'innerBlocks'  => array(),
			'innerContent' => array(),
		);

		/**
		 * Filters the parsed block array for a given hooked block.
		 *
		 * @since 6.5.0
		 *
		 * @param array|null                      $parsed_hooked_block The parsed block array for the given hooked block type, or null to suppress the block.
		 * @param string                          $hooked_block_type   The hooked block type name.
		 * @param string                          $relative_position   The relative position of the hooked block.
		 * @param array                           $parsed_anchor_block The anchor block, in parsed block array format.
		 * @param WP_Block_Template|WP_Post|array $context             The block template, template part, post object,
		 *                                                             or pattern that the anchor block belongs to.
		 */
		$parsed_hooked_block = apply_filters( 'hooked_block', $parsed_hooked_block, $hooked_block_type, $relative_position, $parsed_anchor_block, $context );

		/**
		 * Filters the parsed block array for a given hooked block.
		 *
		 * The dynamic portion of the hook name, `$hooked_block_type`, refers to the block type name of the specific hooked block.
		 *
		 * @since 6.5.0
		 *
		 * @param array|null                      $parsed_hooked_block The parsed block array for the given hooked block type, or null to suppress the block.
		 * @param string                          $hooked_block_type   The hooked block type name.
		 * @param string                          $relative_position   The relative position of the hooked block.
		 * @param array                           $parsed_anchor_block The anchor block, in parsed block array format.
		 * @param WP_Block_Template|WP_Post|array $context             The block template, template part, post object,
		 *                                                             or pattern that the anchor block belongs to.
		 */
		$parsed_hooked_block = apply_filters( "hooked_block_{$hooked_block_type}", $parsed_hooked_block, $hooked_block_type, $relative_position, $parsed_anchor_block, $context );

		if ( null === $parsed_hooked_block ) {
			continue;
		}

		// It's possible that the filter returned a block of a different type, so we explicitly
		// look for the original `$hooked_block_type` in the `ignoredHookedBlocks` metadata.
		if (
			! isset( $parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'] ) ||
			! in_array( $hooked_block_type, $parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'], true )
		) {
			$markup .= serialize_block( $parsed_hooked_block );
		}
	}

	return $markup;
}

/**
 * Adds a list of hooked block types to an anchor block's ignored hooked block types.
 *
 * This function is meant for internal use only.
 *
 * @since 6.5.0
 * @access private
 *
 * @param array                           $parsed_anchor_block The anchor block, in parsed block array format.
 * @param string                          $relative_position   The relative position of the hooked blocks.
 *                                                             Can be one of 'before', 'after', 'first_child', or 'last_child'.
 * @param array                           $hooked_blocks       An array of hooked block types, grouped by anchor block and relative position.
 * @param WP_Block_Template|WP_Post|array $context             The block template, template part, or pattern that the anchor block belongs to.
 * @return string Empty string.
 */
function set_ignored_hooked_blocks_metadata( &$parsed_anchor_block, $relative_position, $hooked_blocks, $context ) {
	$anchor_block_type  = $parsed_anchor_block['blockName'];
	$hooked_block_types = isset( $anchor_block_type, $hooked_blocks[ $anchor_block_type ][ $relative_position ] )
		? $hooked_blocks[ $anchor_block_type ][ $relative_position ]
		: array();

	/** This filter is documented in wp-includes/blocks.php */
	$hooked_block_types = apply_filters( 'hooked_block_types', $hooked_block_types, $relative_position, $anchor_block_type, $context );
	if ( empty( $hooked_block_types ) ) {
		return '';
	}

	foreach ( $hooked_block_types as $index => $hooked_block_type ) {
		$parsed_hooked_block = array(
			'blockName'    => $hooked_block_type,
			'attrs'        => array(),
			'innerBlocks'  => array(),
			'innerContent' => array(),
		);

		/** This filter is documented in wp-includes/blocks.php */
		$parsed_hooked_block = apply_filters( 'hooked_block', $parsed_hooked_block, $hooked_block_type, $relative_position, $parsed_anchor_block, $context );

		/** This filter is documented in wp-includes/blocks.php */
		$parsed_hooked_block = apply_filters( "hooked_block_{$hooked_block_type}", $parsed_hooked_block, $hooked_block_type, $relative_position, $parsed_anchor_block, $context );

		if ( null === $parsed_hooked_block ) {
			unset( $hooked_block_types[ $index ] );
		}
	}

	$previously_ignored_hooked_blocks = isset( $parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'] )
		? $parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks']
		: array();

	$parsed_anchor_block['attrs']['metadata']['ignoredHookedBlocks'] = array_unique(
		array_merge(
			$previously_ignored_hooked_blocks,
			$hooked_block_types
		)
	);

	// Markup for the hooked blocks has already been created (in `insert_hooked_blocks`).
	return '';
}

/**
 * Runs the hooked blocks algorithm on the given content.
 *
 * @since 6.6.0
 * @since 6.7.0 Injects the `theme` attribute into Template Part blocks, even if no hooked blocks are registered.
 * @since 6.8.0 Have the `$context` parameter default to `null`, in which case `get_post()` will be called to use the current post as context.
 * @access private
 *
 * @param string                               $content  Serialized content.
 * @param WP_Block_Template|WP_Post|array|null $context  A block template, template part, post object, or pattern
 *                                                       that the blocks belong to. If set to `null`, `get_post()`
 *                                                       will be called to use the current post as context.
 *                                                       Default: `null`.
 * @param callable                             $callback A function that will be called for each block to generate
 *                                                       the markup for a given list of blocks that are hooked to it.
 *                                                       Default: 'insert_hooked_blocks'.
 * @return string The serialized markup.
 */
function apply_block_hooks_to_content( $content, $context = null, $callback = 'insert_hooked_blocks' ) {
	// Default to the current post if no context is provided.
	if ( null === $context ) {
		$context = get_post();
	}

	$hooked_blocks = get_hooked_blocks();

	$before_block_visitor = '_inject_theme_attribute_in_template_part_block';
	$after_block_visitor  = null;
	if ( ! empty( $hooked_blocks ) || has_filter( 'hooked_block_types' ) ) {
		$before_block_visitor = make_before_block_visitor( $hooked_blocks, $context, $callback );
		$after_block_visitor  = make_after_block_visitor( $hooked_blocks, $context, $callback );
	}

	$block_allows_multiple_instances = array();
	/*
	 * Remove hooked blocks from `$hooked_block_types` if they have `multiple` set to false and
	 * are already present in `$content`.
	 */
	foreach ( $hooked_blocks as $anchor_block_type => $relative_positions ) {
		foreach ( $relative_positions as $relative_position => $hooked_block_types ) {
			foreach ( $hooked_block_types as $index => $hooked_block_type ) {
				$hooked_block_type_definition =
					WP_Block_Type_Registry::get_instance()->get_registered( $hooked_block_type );

				$block_allows_multiple_instances[ $hooked_block_type ] =
					block_has_support( $hooked_block_type_definition, 'multiple', true );

				if (
					! $block_allows_multiple_instances[ $hooked_block_type ] &&
					has_block( $hooked_block_type, $content )
				) {
					unset( $hooked_blocks[ $anchor_block_type ][ $relative_position ][ $index ] );
				}
			}
			if ( empty( $hooked_blocks[ $anchor_block_type ][ $relative_position ] ) ) {
				unset( $hooked_blocks[ $anchor_block_type ][ $relative_position ] );
			}
		}
		if ( empty( $hooked_blocks[ $anchor_block_type ] ) ) {
			unset( $hooked_blocks[ $anchor_block_type ] );
		}
	}

	/*
	 * We also need to cover the case where the hooked block is not present in
	 * `$content` at first and we're allowed to insert it once -- but not again.
	 */
	$suppress_single_instance_blocks = static function ( $hooked_block_types ) use ( &$block_allows_multiple_instances, $content ) {
		static $single_instance_blocks_present_in_content = array();
		foreach ( $hooked_block_types as $index => $hooked_block_type ) {
			if ( ! isset( $block_allows_multiple_instances[ $hooked_block_type ] ) ) {
				$hooked_block_type_definition =
					WP_Block_Type_Registry::get_instance()->get_registered( $hooked_block_type );

				$block_allows_multiple_instances[ $hooked_block_type ] =
					block_has_support( $hooked_block_type_definition, 'multiple', true );
			}

			if ( $block_allows_multiple_instances[ $hooked_block_type ] ) {
				continue;
			}

			// The block doesn't allow multiple instances, so we need to check if it's already present.
			if (
				in_array( $hooked_block_type, $single_instance_blocks_present_in_content, true ) ||
				has_block( $hooked_block_type, $content )
			) {
				unset( $hooked_block_types[ $index ] );
			} else {
				// We can insert the block once, but need to remember not to insert it again.
				$single_instance_blocks_present_in_content[] = $hooked_block_type;
			}
		}
		return $hooked_block_types;
	};
	add_filter( 'hooked_block_types', $suppress_single_instance_blocks, PHP_INT_MAX );
	$content = traverse_and_serialize_blocks(
		parse_blocks( $content ),
		$before_block_visitor,
		$after_block_visitor
	);
	remove_filter( 'hooked_block_types', $suppress_single_instance_blocks, PHP_INT_MAX );

	return $content;
}

/**
 * Run the Block Hooks algorithm on a post object's content.
 *
 * This function is different from `apply_block_hooks_to_content` in that
 * it takes ignored hooked block information from the post's metadata into
 * account. This ensures that any blocks hooked as first or last child
 * of the block that corresponds to the post type are handled correctly.
 *
 * @since 6.8.0
 * @access private
 *
 * @param string       $content  Serialized content.
 * @param WP_Post|null $post     A post object that the content belongs to. If set to `null`,
 *                               `get_post()` will be called to use the current post as context.
 *                               Default: `null`.
 * @param callable     $callback A function that will be called for each block to generate
 *                               the markup for a given list of blocks that are hooked to it.
 *                               Default: 'insert_hooked_blocks'.
 * @return string The serialized markup.
 */
function apply_block_hooks_to_content_from_post_object( $content, $post = null, $callback = 'insert_hooked_blocks' ) {
	// Default to the current post if no context is provided.
	if ( null === $post ) {
		$post = get_post();
	}

	if ( ! $post instanceof WP_Post ) {
		return apply_block_hooks_to_content( $content, $post, $callback );
	}

	/*
	 * If the content was created using the classic editor or using a single Classic block
	 * (`core/freeform`), it might not contain any block markup at all.
	 * However, we still might need to inject hooked blocks in the first child or last child
	 * positions of the parent block. To be able to apply the Block Hooks algorithm, we wrap
	 * the content in a `core/freeform` wrapper block.
	 */
	if ( ! has_blocks( $content ) ) {
		$original_content = $content;

		$content_wrapped_in_classic_block = get_comment_delimited_block_content(
			'core/freeform',
			array(),
			$content
		);

		$content = $content_wrapped_in_classic_block;
	}

	$attributes = array();

	// If context is a post object, `ignoredHookedBlocks` information is stored in its post meta.
	$ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true );
	if ( ! empty( $ignored_hooked_blocks ) ) {
		$ignored_hooked_blocks  = json_decode( $ignored_hooked_blocks, true );
		$attributes['metadata'] = array(
			'ignoredHookedBlocks' => $ignored_hooked_blocks,
		);
	}

	/*
	 * We need to wrap the content in a temporary wrapper block with that metadata
	 * so the Block Hooks algorithm can insert blocks that are hooked as first or last child
	 * of the wrapper block.
	 * To that end, we need to determine the wrapper block type based on the post type.
	 */
	if ( 'wp_navigation' === $post->post_type ) {
		$wrapper_block_type = 'core/navigation';
	} elseif ( 'wp_block' === $post->post_type ) {
		$wrapper_block_type = 'core/block';
	} else {
		$wrapper_block_type = 'core/post-content';
	}

	$content = get_comment_delimited_block_content(
		$wrapper_block_type,
		$attributes,
		$content
	);

	/*
	 * We need to avoid inserting any blocks hooked into the `before` and `after` positions
	 * of the temporary wrapper block that we create to wrap the content.
	 * See https://core.trac.wordpress.org/ticket/63287 for more details.
	 */
	$suppress_blocks_from_insertion_before_and_after_wrapper_block = static function ( $hooked_block_types, $relative_position, $anchor_block_type ) use ( $wrapper_block_type ) {
		if (
			$wrapper_block_type === $anchor_block_type &&
			in_array( $relative_position, array( 'before', 'after' ), true )
		) {
			return array();
		}
		return $hooked_block_types;
	};

	// Apply Block Hooks.
	add_filter( 'hooked_block_types', $suppress_blocks_from_insertion_before_and_after_wrapper_block, PHP_INT_MAX, 3 );
	$content = apply_block_hooks_to_content( $content, $post, $callback );
	remove_filter( 'hooked_block_types', $suppress_blocks_from_insertion_before_and_after_wrapper_block, PHP_INT_MAX );

	// Finally, we need to remove the temporary wrapper block.
	$content = remove_serialized_parent_block( $content );

	// If we wrapped the content in a `core/freeform` block, we also need to remove that.
	if ( ! empty( $content_wrapped_in_classic_block ) ) {
		/*
		 * We cannot simply use remove_serialized_parent_block() here,
		 * as that function assumes that the block wrapper is at the top level.
		 * However, there might now be a hooked block inserted next to it
		 * (as first or last child of the parent).
		 */
		$content = str_replace( $content_wrapped_in_classic_block, $original_content, $content );
	}

	return $content;
}

/**
 * Accepts the serialized markup of a block and its inner blocks, and returns serialized markup of the inner blocks.
 *
 * @since 6.6.0
 * @access private
 *
 * @param string $serialized_block The serialized markup of a block and its inner blocks.
 * @return string The serialized markup of the inner blocks.
 */
function remove_serialized_parent_block( $serialized_block ) {
	$start = strpos( $serialized_block, '-->' ) + strlen( '-->' );
	$end   = strrpos( $serialized_block, '<!--' );
	return substr( $serialized_block, $start, $end - $start );
}

/**
 * Accepts the serialized markup of a block and its inner blocks, and returns serialized markup of the wrapper block.
 *
 * @since 6.7.0
 * @access private
 *
 * @see remove_serialized_parent_block()
 *
 * @param string $serialized_block The serialized markup of a block and its inner blocks.
 * @return string The serialized markup of the wrapper block.
 */
function extract_serialized_parent_block( $serialized_block ) {
	$start = strpos( $serialized_block, '-->' ) + strlen( '-->' );
	$end   = strrpos( $serialized_block, '<!--' );
	return substr( $serialized_block, 0, $start ) . substr( $serialized_block, $end );
}

/**
 * Updates the wp_postmeta with the list of ignored hooked blocks
 * where the inner blocks are stored as post content.
 *
 * @since 6.6.0
 * @since 6.8.0 Support non-`wp_navigation` post types.
 * @access private
 *
 * @param stdClass $post Post object.
 * @return stdClass The updated post object.
 */
function update_ignored_hooked_blocks_postmeta( $post ) {
	/*
	 * In this scenario the user has likely tried to create a new post object via the REST API.
	 * In which case we won't have a post ID to work with and store meta against.
	 */
	if ( empty( $post->ID ) ) {
		return $post;
	}

	/*
	 * Skip meta generation when consumers intentionally update specific fields
	 * and omit the content update.
	 */
	if ( ! isset( $post->post_content ) ) {
		return $post;
	}

	/*
	 * Skip meta generation if post type is not set.
	 */
	if ( ! isset( $post->post_type ) ) {
		return $post;
	}

	$attributes = array();

	$ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true );
	if ( ! empty( $ignored_hooked_blocks ) ) {
		$ignored_hooked_blocks  = json_decode( $ignored_hooked_blocks, true );
		$attributes['metadata'] = array(
			'ignoredHookedBlocks' => $ignored_hooked_blocks,
		);
	}

	if ( 'wp_navigation' === $post->post_type ) {
		$wrapper_block_type = 'core/navigation';
	} elseif ( 'wp_block' === $post->post_type ) {
		$wrapper_block_type = 'core/block';
	} else {
		$wrapper_block_type = 'core/post-content';
	}

	$markup = get_comment_delimited_block_content(
		$wrapper_block_type,
		$attributes,
		$post->post_content
	);

	$existing_post = get_post( $post->ID );
	// Merge the existing post object with the updated post object to pass to the block hooks algorithm for context.
	$context          = (object) array_merge( (array) $existing_post, (array) $post );
	$context          = new WP_Post( $context ); // Convert to WP_Post object.
	$serialized_block = apply_block_hooks_to_content( $markup, $context, 'set_ignored_hooked_blocks_metadata' );
	$root_block       = parse_blocks( $serialized_block )[0];

	$ignored_hooked_blocks = isset( $root_block['attrs']['metadata']['ignoredHookedBlocks'] )
		? $root_block['attrs']['metadata']['ignoredHookedBlocks']
		: array();

	if ( ! empty( $ignored_hooked_blocks ) ) {
		$existing_ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true );
		if ( ! empty( $existing_ignored_hooked_blocks ) ) {
			$existing_ignored_hooked_blocks = json_decode( $existing_ignored_hooked_blocks, true );
			$ignored_hooked_blocks          = array_unique( array_merge( $ignored_hooked_blocks, $existing_ignored_hooked_blocks ) );
		}

		if ( ! isset( $post->meta_input ) ) {
			$post->meta_input = array();
		}
		$post->meta_input['_wp_ignored_hooked_blocks'] = json_encode( $ignored_hooked_blocks );
	}

	$post->post_content = remove_serialized_parent_block( $serialized_block );
	return $post;
}

/**
 * Returns the markup for blocks hooked to the given anchor block in a specific relative position and then
 * adds a list of hooked block types to an anchor block's ignored hooked block types.
 *
 * This function is meant for internal use only.
 *
 * @since 6.6.0
 * @access private
 *
 * @param array                           $parsed_anchor_block The anchor block, in parsed block array format.
 * @param string                          $relative_position   The relative position of the hooked blocks.
 *                                                             Can be one of 'before', 'after', 'first_child', or 'last_child'.
 * @param array                           $hooked_blocks       An array of hooked block types, grouped by anchor block and relative position.
 * @param WP_Block_Template|WP_Post|array $context             The block template, template part, or pattern that the anchor block belongs to.
 * @return string
 */
function insert_hooked_blocks_and_set_ignored_hooked_blocks_metadata( &$parsed_anchor_block, $relative_position, $hooked_blocks, $context ) {
	$markup  = insert_hooked_blocks( $parsed_anchor_block, $relative_position, $hooked_blocks, $context );
	$markup .= set_ignored_hooked_blocks_metadata( $parsed_anchor_block, $relative_position, $hooked_blocks, $context );

	return $markup;
}

/**
 * Hooks into the REST API response for the Posts endpoint and adds the first and last inner blocks.
 *
 * @since 6.6.0
 * @since 6.8.0 Support non-`wp_navigation` post types.
 *
 * @param WP_REST_Response $response The response object.
 * @param WP_Post          $post     Post object.
 * @return WP_REST_Response The response object.
 */
function insert_hooked_blocks_into_rest_response( $response, $post ) {
	if ( empty( $response->data['content']['raw'] ) ) {
		return $response;
	}

	$response->data['content']['raw'] = apply_block_hooks_to_content_from_post_object(
		$response->data['content']['raw'],
		$post,
		'insert_hooked_blocks_and_set_ignored_hooked_blocks_metadata'
	);

	// If the rendered content was previously empty, we leave it like that.
	if ( empty( $response->data['content']['rendered'] ) ) {
		return $response;
	}

	// `apply_block_hooks_to_content` is called above. Ensure it is not called again as a filter.
	$priority = has_filter( 'the_content', 'apply_block_hooks_to_content_from_post_object' );
	if ( false !== $priority ) {
		remove_filter( 'the_content', 'apply_block_hooks_to_content_from_post_object', $priority );
	}

	/** This filter is documented in wp-includes/post-template.php */
	$response->data['content']['rendered'] = apply_filters(
		'the_content',
		$response->data['content']['raw']
	);

	// Restore the filter if it was set initially.
	if ( false !== $priority ) {
		add_filter( 'the_content', 'apply_block_hooks_to_content_from_post_object', $priority );
	}

	return $response;
}

/**
 * Returns a function that injects the theme attribute into, and hooked blocks before, a given block.
 *
 * The returned function can be used as `$pre_callback` argument to `traverse_and_serialize_block(s)`,
 * where it will inject the `theme` attribute into all Template Part blocks, and prepend the markup for
 * any blocks hooked `before` the given block and as its parent's `first_child`, respectively.
 *
 * This function is meant for internal use only.
 *
 * @since 6.4.0
 * @since 6.5.0 Added $callback argument.
 * @access private
 *
 * @param array                           $hooked_blocks An array of blocks hooked to another given block.
 * @param WP_Block_Template|WP_Post|array $context       A block template, template part, post object,
 *                                                       or pattern that the blocks belong to.
 * @param callable                        $callback      A function that will be called for each block to generate
 *                                                       the markup for a given list of blocks that are hooked to it.
 *                                                       Default: 'insert_hooked_blocks'.
 * @return callable A function that returns the serialized markup for the given block,
 *                  including the markup for any hooked blocks before it.
 */
function make_before_block_visitor( $hooked_blocks, $context, $callback = 'insert_hooked_blocks' ) {
	/**
	 * Injects hooked blocks before the given block, injects the `theme` attribute into Template Part blocks, and returns the serialized markup.
	 *
	 * If the current block is a Template Part block, inject the `theme` attribute.
	 * Furthermore, prepend the markup for any blocks hooked `before` the given block and as its parent's
	 * `first_child`, respectively, to the serialized markup for the given block.
	 *
	 * @param array $block        The block to inject the theme attribute into, and hooked blocks before. Passed by reference.
	 * @param array $parent_block The parent block of the given block. Passed by reference. Default null.
	 * @param array $prev         The previous sibling block of the given block. Default null.
	 * @return string The serialized markup for the given block, with the markup for any hooked blocks prepended to it.
	 */
	return function ( &$block, &$parent_block = null, $prev = null ) use ( $hooked_blocks, $context, $callback ) {
		_inject_theme_attribute_in_template_part_block( $block );

		$markup = '';

		if ( $parent_block && ! $prev ) {
			// Candidate for first-child insertion.
			$markup .= call_user_func_array(
				$callback,
				array( &$parent_block, 'first_child', $hooked_blocks, $context )
			);
		}

		$markup .= call_user_func_array(
			$callback,
			array( &$block, 'before', $hooked_blocks, $context )
		);

		return $markup;
	};
}

/**
 * Returns a function that injects the hooked blocks after a given block.
 *
 * The returned function can be used as `$post_callback` argument to `traverse_and_serialize_block(s)`,
 * where it will append the markup for any blocks hooked `after` the given block and as its parent's
 * `last_child`, respectively.
 *
 * This function is meant for internal use only.
 *
 * @since 6.4.0
 * @since 6.5.0 Added $callback argument.
 * @access private
 *
 * @param array                           $hooked_blocks An array of blocks hooked to another block.
 * @param WP_Block_Template|WP_Post|array $context       A block template, template part, post object,
 *                                                       or pattern that the blocks belong to.
 * @param callable                        $callback      A function that will be called for each block to generate
 *                                                       the markup for a given list of blocks that are hooked to it.
 *                                                       Default: 'insert_hooked_blocks'.
 * @return callable A function that returns the serialized markup for the given block,
 *                  including the markup for any hooked blocks after it.
 */
function make_after_block_visitor( $hooked_blocks, $context, $callback = 'insert_hooked_blocks' ) {
	/**
	 * Injects hooked blocks after the given block, and returns the serialized markup.
	 *
	 * Append the markup for any blocks hooked `after` the given block and as its parent's
	 * `last_child`, respectively, to the serialized markup for the given block.
	 *
	 * @param array $block        The block to inject the hooked blocks after. Passed by reference.
	 * @param array $parent_block The parent block of the given block. Passed by reference. Default null.
	 * @param array $next         The next sibling block of the given block. Default null.
	 * @return string The serialized markup for the given block, with the markup for any hooked blocks appended to it.
	 */
	return function ( &$block, &$parent_block = null, $next = null ) use ( $hooked_blocks, $context, $callback ) {
		$markup = call_user_func_array(
			$callback,
			array( &$block, 'after', $hooked_blocks, $context )
		);

		if ( $parent_block && ! $next ) {
			// Candidate for last-child insertion.
			$markup .= call_user_func_array(
				$callback,
				array( &$parent_block, 'last_child', $hooked_blocks, $context )
			);
		}

		return $markup;
	};
}

/**
 * Given an array of attributes, returns a string in the serialized attributes
 * format prepared for post content.
 *
 * The serialized result is a JSON-encoded string, with unicode escape sequence
 * substitution for characters which might otherwise interfere with embedding
 * the result in an HTML comment.
 *
 * This function must produce output that remains in sync with the output of
 * the serializeAttributes JavaScript function in the block editor in order
 * to ensure consistent operation between PHP and JavaScript.
 *
 * @since 5.3.1
 *
 * @param array $block_attributes Attributes object.
 * @return string Serialized attributes.
 */
function serialize_block_attributes( $block_attributes ) {
	$encoded_attributes = wp_json_encode( $block_attributes, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE );

	return strtr(
		$encoded_attributes,
		array(
			'\\\\' => '\\u005c',
			'--'   => '\\u002d\\u002d',
			'<'    => '\\u003c',
			'>'    => '\\u003e',
			'&'    => '\\u0026',
			'\\"'  => '\\u0022',
		)
	);
}

/**
 * Returns the block name to use for serialization. This will remove the default
 * "core/" namespace from a block name.
 *
 * @since 5.3.1
 *
 * @param string|null $block_name Optional. Original block name. Null if the block name is unknown,
 *                                e.g. Classic blocks have their name set to null. Default null.
 * @return string Block name to use for serialization.
 */
function strip_core_block_namespace( $block_name = null ) {
	if ( is_string( $block_name ) && str_starts_with( $block_name, 'core/' ) ) {
		return substr( $block_name, 5 );
	}

	return $block_name;
}

/**
 * Returns the content of a block, including comment delimiters.
 *
 * @since 5.3.1
 *
 * @param string|null $block_name       Block name. Null if the block name is unknown,
 *                                      e.g. Classic blocks have their name set to null.
 * @param array       $block_attributes Block attributes.
 * @param string      $block_content    Block save content.
 * @return string Comment-delimited block content.
 */
function get_comment_delimited_block_content( $block_name, $block_attributes, $block_content ) {
	if ( is_null( $block_name ) ) {
		return $block_content;
	}

	$serialized_block_name = strip_core_block_namespace( $block_name );
	$serialized_attributes = empty( $block_attributes ) ? '' : serialize_block_attributes( $block_attributes ) . ' ';

	if ( empty( $block_content ) ) {
		return sprintf( '<!-- wp:%s %s/-->', $serialized_block_name, $serialized_attributes );
	}

	return sprintf(
		'<!-- wp:%s %s-->%s<!-- /wp:%s -->',
		$serialized_block_name,
		$serialized_attributes,
		$block_content,
		$serialized_block_name
	);
}

/**
 * Returns the content of a block, including comment delimiters, serializing all
 * attributes from the given parsed block.
 *
 * This should be used when preparing a block to be saved to post content.
 * Prefer `render_block` when preparing a block for display. Unlike
 * `render_block`, this does not evaluate a block's `render_callback`, and will
 * instead preserve the markup as parsed.
 *
 * @since 5.3.1
 *
 * @param array $block {
 *     An associative array of a single parsed block object. See WP_Block_Parser_Block.
 *
 *     @type string|null $blockName    Name of block.
 *     @type array       $attrs        Attributes from block comment delimiters.
 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
 *                                     have the same structure as this one.
 *     @type string      $innerHTML    HTML from inside block comment delimiters.
 *     @type array       $innerContent List of string fragments and null markers where
 *                                     inner blocks were found.
 * }
 * @return string String of rendered HTML.
 */
function serialize_block( $block ) {
	$block_content = '';

	$index = 0;
	foreach ( $block['innerContent'] as $chunk ) {
		$block_content .= is_string( $chunk ) ? $chunk : serialize_block( $block['innerBlocks'][ $index++ ] );
	}

	if ( ! is_array( $block['attrs'] ) ) {
		$block['attrs'] = array();
	}

	return get_comment_delimited_block_content(
		$block['blockName'],
		$block['attrs'],
		$block_content
	);
}

/**
 * Returns a joined string of the aggregate serialization of the given
 * parsed blocks.
 *
 * @since 5.3.1
 *
 * @param array[] $blocks {
 *     Array of block structures.
 *
 *     @type array ...$0 {
 *         An associative array of a single parsed block object. See WP_Block_Parser_Block.
 *
 *         @type string|null $blockName    Name of block.
 *         @type array       $attrs        Attributes from block comment delimiters.
 *         @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
 *                                         have the same structure as this one.
 *         @type string      $innerHTML    HTML from inside block comment delimiters.
 *         @type array       $innerContent List of string fragments and null markers where
 *                                         inner blocks were found.
 *     }
 * }
 * @return string String of rendered HTML.
 */
function serialize_blocks( $blocks ) {
	return implode( '', array_map( 'serialize_block', $blocks ) );
}

/**
 * Traverses a parsed block tree and applies callbacks before and after serializing it.
 *
 * Recursively traverses the block and its inner blocks and applies the two callbacks provided as
 * arguments, the first one before serializing the block, and the second one after serializing it.
 * If either callback returns a string value, it will be prepended and appended to the serialized
 * block markup, respectively.
 *
 * The callbacks will receive a reference to the current block as their first argument, so that they
 * can also modify it, and the current block's parent block as second argument. Finally, the
 * `$pre_callback` receives the previous block, whereas the `$post_callback` receives
 * the next block as third argument.
 *
 * Serialized blocks are returned including comment delimiters, and with all attributes serialized.
 *
 * This function should be used when there is a need to modify the saved block, or to inject markup
 * into the return value. Prefer `serialize_block` when preparing a block to be saved to post content.
 *
 * This function is meant for internal use only.
 *
 * @since 6.4.0
 * @access private
 *
 * @see serialize_block()
 *
 * @param array    $block         An associative array of a single parsed block object. See WP_Block_Parser_Block.
 * @param callable $pre_callback  Callback to run on each block in the tree before it is traversed and serialized.
 *                                It is called with the following arguments: &$block, $parent_block, $previous_block.
 *                                Its string return value will be prepended to the serialized block markup.
 * @param callable $post_callback Callback to run on each block in the tree after it is traversed and serialized.
 *                                It is called with the following arguments: &$block, $parent_block, $next_block.
 *                                Its string return value will be appended to the serialized block markup.
 * @return string Serialized block markup.
 */
function traverse_and_serialize_block( $block, $pre_callback = null, $post_callback = null ) {
	$block_content = '';
	$block_index   = 0;

	foreach ( $block['innerContent'] as $chunk ) {
		if ( is_string( $chunk ) ) {
			$block_content .= $chunk;
		} else {
			$inner_block = $block['innerBlocks'][ $block_index ];

			if ( is_callable( $pre_callback ) ) {
				$prev = 0 === $block_index
					? null
					: $block['innerBlocks'][ $block_index - 1 ];

				$block_content .= call_user_func_array(
					$pre_callback,
					array( &$inner_block, &$block, $prev )
				);
			}

			if ( is_callable( $post_callback ) ) {
				$next = count( $block['innerBlocks'] ) - 1 === $block_index
					? null
					: $block['innerBlocks'][ $block_index + 1 ];

				$post_markup = call_user_func_array(
					$post_callback,
					array( &$inner_block, &$block, $next )
				);
			}

			$block_content .= traverse_and_serialize_block( $inner_block, $pre_callback, $post_callback );
			$block_content .= isset( $post_markup ) ? $post_markup : '';

			++$block_index;
		}
	}

	if ( ! is_array( $block['attrs'] ) ) {
		$block['attrs'] = array();
	}

	return get_comment_delimited_block_content(
		$block['blockName'],
		$block['attrs'],
		$block_content
	);
}

/**
 * Replaces patterns in a block tree with their content.
 *
 * @since 6.6.0
 *
 * @param array $blocks An array blocks.
 *
 * @return array An array of blocks with patterns replaced by their content.
 */
function resolve_pattern_blocks( $blocks ) {
	static $inner_content;
	// Keep track of seen references to avoid infinite loops.
	static $seen_refs = array();
	$i                = 0;
	while ( $i < count( $blocks ) ) {
		if ( 'core/pattern' === $blocks[ $i ]['blockName'] ) {
			$attrs = $blocks[ $i ]['attrs'];

			if ( empty( $attrs['slug'] ) ) {
				++$i;
				continue;
			}

			$slug = $attrs['slug'];

			if ( isset( $seen_refs[ $slug ] ) ) {
				// Skip recursive patterns.
				array_splice( $blocks, $i, 1 );
				continue;
			}

			$registry = WP_Block_Patterns_Registry::get_instance();
			$pattern  = $registry->get_registered( $slug );

			// Skip unknown patterns.
			if ( ! $pattern ) {
				++$i;
				continue;
			}

			$blocks_to_insert   = parse_blocks( $pattern['content'] );
			$seen_refs[ $slug ] = true;
			$prev_inner_content = $inner_content;
			$inner_content      = null;
			$blocks_to_insert   = resolve_pattern_blocks( $blocks_to_insert );
			$inner_content      = $prev_inner_content;
			unset( $seen_refs[ $slug ] );
			array_splice( $blocks, $i, 1, $blocks_to_insert );

			// If we have inner content, we need to insert nulls in the
			// inner content array, otherwise serialize_blocks will skip
			// blocks.
			if ( $inner_content ) {
				$null_indices  = array_keys( $inner_content, null, true );
				$content_index = $null_indices[ $i ];
				$nulls         = array_fill( 0, count( $blocks_to_insert ), null );
				array_splice( $inner_content, $content_index, 1, $nulls );
			}

			// Skip inserted blocks.
			$i += count( $blocks_to_insert );
		} else {
			if ( ! empty( $blocks[ $i ]['innerBlocks'] ) ) {
				$prev_inner_content           = $inner_content;
				$inner_content                = $blocks[ $i ]['innerContent'];
				$blocks[ $i ]['innerBlocks']  = resolve_pattern_blocks(
					$blocks[ $i ]['innerBlocks']
				);
				$blocks[ $i ]['innerContent'] = $inner_content;
				$inner_content                = $prev_inner_content;
			}
			++$i;
		}
	}
	return $blocks;
}

/**
 * Given an array of parsed block trees, applies callbacks before and after serializing them and
 * returns their concatenated output.
 *
 * Recursively traverses the blocks and their inner blocks and applies the two callbacks provided as
 * arguments, the first one before serializing a block, and the second one after serializing.
 * If either callback returns a string value, it will be prepended and appended to the serialized
 * block markup, respectively.
 *
 * The callbacks will receive a reference to the current block as their first argument, so that they
 * can also modify it, and the current block's parent block as second argument. Finally, the
 * `$pre_callback` receives the previous block, whereas the `$post_callback` receives
 * the next block as third argument.
 *
 * Serialized blocks are returned including comment delimiters, and with all attributes serialized.
 *
 * This function should be used when there is a need to modify the saved blocks, or to inject markup
 * into the return value. Prefer `serialize_blocks` when preparing blocks to be saved to post content.
 *
 * This function is meant for internal use only.
 *
 * @since 6.4.0
 * @access private
 *
 * @see serialize_blocks()
 *
 * @param array[]  $blocks        An array of parsed blocks. See WP_Block_Parser_Block.
 * @param callable $pre_callback  Callback to run on each block in the tree before it is traversed and serialized.
 *                                It is called with the following arguments: &$block, $parent_block, $previous_block.
 *                                Its string return value will be prepended to the serialized block markup.
 * @param callable $post_callback Callback to run on each block in the tree after it is traversed and serialized.
 *                                It is called with the following arguments: &$block, $parent_block, $next_block.
 *                                Its string return value will be appended to the serialized block markup.
 * @return string Serialized block markup.
 */
function traverse_and_serialize_blocks( $blocks, $pre_callback = null, $post_callback = null ) {
	$result       = '';
	$parent_block = null; // At the top level, there is no parent block to pass to the callbacks; yet the callbacks expect a reference.

	$pre_callback_is_callable  = is_callable( $pre_callback );
	$post_callback_is_callable = is_callable( $post_callback );

	foreach ( $blocks as $index => $block ) {
		if ( $pre_callback_is_callable ) {
			$prev = 0 === $index
				? null
				: $blocks[ $index - 1 ];

			$result .= call_user_func_array(
				$pre_callback,
				array( &$block, &$parent_block, $prev )
			);
		}

		if ( $post_callback_is_callable ) {
			$next = count( $blocks ) - 1 === $index
				? null
				: $blocks[ $index + 1 ];

			$post_markup = call_user_func_array(
				$post_callback,
				array( &$block, &$parent_block, $next )
			);
		}

		$result .= traverse_and_serialize_block( $block, $pre_callback, $post_callback );
		$result .= isset( $post_markup ) ? $post_markup : '';
	}

	return $result;
}

/**
 * Filters and sanitizes block content to remove non-allowable HTML
 * from parsed block attribute values.
 *
 * @since 5.3.1
 *
 * @param string         $text              Text that may contain block content.
 * @param array[]|string $allowed_html      Optional. An array of allowed HTML elements and attributes,
 *                                          or a context name such as 'post'. See wp_kses_allowed_html()
 *                                          for the list of accepted context names. Default 'post'.
 * @param string[]       $allowed_protocols Optional. Array of allowed URL protocols.
 *                                          Defaults to the result of wp_allowed_protocols().
 * @return string The filtered and sanitized content result.
 */
function filter_block_content( $text, $allowed_html = 'post', $allowed_protocols = array() ) {
	$result = '';

	if ( str_contains( $text, '<!--' ) && str_contains( $text, '--->' ) ) {
		$text = preg_replace_callback( '%<!--(.*?)--->%', '_filter_block_content_callback', $text );
	}

	$blocks = parse_blocks( $text );
	foreach ( $blocks as $block ) {
		$block   = filter_block_kses( $block, $allowed_html, $allowed_protocols );
		$result .= serialize_block( $block );
	}

	return $result;
}

/**
 * Callback used for regular expression replacement in filter_block_content().
 *
 * @since 6.2.1
 * @access private
 *
 * @param array $matches Array of preg_replace_callback matches.
 * @return string Replacement string.
 */
function _filter_block_content_callback( $matches ) {
	return '<!--' . rtrim( $matches[1], '-' ) . '-->';
}

/**
 * Filters and sanitizes a parsed block to remove non-allowable HTML
 * from block attribute values.
 *
 * @since 5.3.1
 *
 * @param WP_Block_Parser_Block $block             The parsed block object.
 * @param array[]|string        $allowed_html      An array of allowed HTML elements and attributes,
 *                                                 or a context name such as 'post'. See wp_kses_allowed_html()
 *                                                 for the list of accepted context names.
 * @param string[]              $allowed_protocols Optional. Array of allowed URL protocols.
 *                                                 Defaults to the result of wp_allowed_protocols().
 * @return array The filtered and sanitized block object result.
 */
function filter_block_kses( $block, $allowed_html, $allowed_protocols = array() ) {
	$block['attrs'] = filter_block_kses_value( $block['attrs'], $allowed_html, $allowed_protocols, $block );

	if ( is_array( $block['innerBlocks'] ) ) {
		foreach ( $block['innerBlocks'] as $i => $inner_block ) {
			$block['innerBlocks'][ $i ] = filter_block_kses( $inner_block, $allowed_html, $allowed_protocols );
		}
	}

	return $block;
}

/**
 * Filters and sanitizes a parsed block attribute value to remove
 * non-allowable HTML.
 *
 * @since 5.3.1
 * @since 6.5.5 Added the `$block_context` parameter.
 *
 * @param string[]|string $value             The attribute value to filter.
 * @param array[]|string  $allowed_html      An array of allowed HTML elements and attributes,
 *                                           or a context name such as 'post'. See wp_kses_allowed_html()
 *                                           for the list of accepted context names.
 * @param string[]        $allowed_protocols Optional. Array of allowed URL protocols.
 *                                           Defaults to the result of wp_allowed_protocols().
 * @param array           $block_context     Optional. The block the attribute belongs to, in parsed block array format.
 * @return string[]|string The filtered and sanitized result.
 */
function filter_block_kses_value( $value, $allowed_html, $allowed_protocols = array(), $block_context = null ) {
	if ( is_array( $value ) ) {
		foreach ( $value as $key => $inner_value ) {
			$filtered_key   = filter_block_kses_value( $key, $allowed_html, $allowed_protocols, $block_context );
			$filtered_value = filter_block_kses_value( $inner_value, $allowed_html, $allowed_protocols, $block_context );

			if ( isset( $block_context['blockName'] ) && 'core/template-part' === $block_context['blockName'] ) {
				$filtered_value = filter_block_core_template_part_attributes( $filtered_value, $filtered_key, $allowed_html );
			}
			if ( $filtered_key !== $key ) {
				unset( $value[ $key ] );
			}

			$value[ $filtered_key ] = $filtered_value;
		}
	} elseif ( is_string( $value ) ) {
		return wp_kses( $value, $allowed_html, $allowed_protocols );
	}

	return $value;
}

/**
 * Sanitizes the value of the Template Part block's `tagName` attribute.
 *
 * @since 6.5.5
 *
 * @param string         $attribute_value The attribute value to filter.
 * @param string         $attribute_name  The attribute name.
 * @param array[]|string $allowed_html    An array of allowed HTML elements and attributes,
 *                                        or a context name such as 'post'. See wp_kses_allowed_html()
 *                                        for the list of accepted context names.
 * @return string The sanitized attribute value.
 */
function filter_block_core_template_part_attributes( $attribute_value, $attribute_name, $allowed_html ) {
	if ( empty( $attribute_value ) || 'tagName' !== $attribute_name ) {
		return $attribute_value;
	}
	if ( ! is_array( $allowed_html ) ) {
		$allowed_html = wp_kses_allowed_html( $allowed_html );
	}
	return isset( $allowed_html[ $attribute_value ] ) ? $attribute_value : '';
}

/**
 * Parses blocks out of a content string, and renders those appropriate for the excerpt.
 *
 * As the excerpt should be a small string of text relevant to the full post content,
 * this function renders the blocks that are most likely to contain such text.
 *
 * @since 5.0.0
 *
 * @param string $content The content to parse.
 * @return string The parsed and filtered content.
 */
function excerpt_remove_blocks( $content ) {
	if ( ! has_blocks( $content ) ) {
		return $content;
	}

	$allowed_inner_blocks = array(
		// Classic blocks have their blockName set to null.
		null,
		'core/freeform',
		'core/heading',
		'core/html',
		'core/list',
		'core/media-text',
		'core/paragraph',
		'core/preformatted',
		'core/pullquote',
		'core/quote',
		'core/table',
		'core/verse',
	);

	$allowed_wrapper_blocks = array(
		'core/columns',
		'core/column',
		'core/group',
	);

	/**
	 * Filters the list of blocks that can be used as wrapper blocks, allowing
	 * excerpts to be generated from the `innerBlocks` of these wrappers.
	 *
	 * @since 5.8.0
	 *
	 * @param string[] $allowed_wrapper_blocks The list of names of allowed wrapper blocks.
	 */
	$allowed_wrapper_blocks = apply_filters( 'excerpt_allowed_wrapper_blocks', $allowed_wrapper_blocks );

	$allowed_blocks = array_merge( $allowed_inner_blocks, $allowed_wrapper_blocks );

	/**
	 * Filters the list of blocks that can contribute to the excerpt.
	 *
	 * If a dynamic block is added to this list, it must not generate another
	 * excerpt, as this will cause an infinite loop to occur.
	 *
	 * @since 5.0.0
	 *
	 * @param string[] $allowed_blocks The list of names of allowed blocks.
	 */
	$allowed_blocks = apply_filters( 'excerpt_allowed_blocks', $allowed_blocks );
	$blocks         = parse_blocks( $content );
	$output         = '';

	foreach ( $blocks as $block ) {
		if ( in_array( $block['blockName'], $allowed_blocks, true ) ) {
			if ( ! empty( $block['innerBlocks'] ) ) {
				if ( in_array( $block['blockName'], $allowed_wrapper_blocks, true ) ) {
					$output .= _excerpt_render_inner_blocks( $block, $allowed_blocks );
					continue;
				}

				// Skip the block if it has disallowed or nested inner blocks.
				foreach ( $block['innerBlocks'] as $inner_block ) {
					if (
						! in_array( $inner_block['blockName'], $allowed_inner_blocks, true ) ||
						! empty( $inner_block['innerBlocks'] )
					) {
						continue 2;
					}
				}
			}

			$output .= render_block( $block );
		}
	}

	return $output;
}

/**
 * Parses footnotes markup out of a content string,
 * and renders those appropriate for the excerpt.
 *
 * @since 6.3.0
 *
 * @param string $content The content to parse.
 * @return string The parsed and filtered content.
 */
function excerpt_remove_footnotes( $content ) {
	if ( ! str_contains( $content, 'data-fn=' ) ) {
		return $content;
	}

	return preg_replace(
		'_<sup data-fn="[^"]+" class="[^"]+">\s*<a href="[^"]+" id="[^"]+">\d+</a>\s*</sup>_',
		'',
		$content
	);
}

/**
 * Renders inner blocks from the allowed wrapper blocks
 * for generating an excerpt.
 *
 * @since 5.8.0
 * @access private
 *
 * @param array $parsed_block   The parsed block.
 * @param array $allowed_blocks The list of allowed inner blocks.
 * @return string The rendered inner blocks.
 */
function _excerpt_render_inner_blocks( $parsed_block, $allowed_blocks ) {
	$output = '';

	foreach ( $parsed_block['innerBlocks'] as $inner_block ) {
		if ( ! in_array( $inner_block['blockName'], $allowed_blocks, true ) ) {
			continue;
		}

		if ( empty( $inner_block['innerBlocks'] ) ) {
			$output .= render_block( $inner_block );
		} else {
			$output .= _excerpt_render_inner_blocks( $inner_block, $allowed_blocks );
		}
	}

	return $output;
}

/**
 * Renders a single block into a HTML string.
 *
 * @since 5.0.0
 *
 * @global WP_Post $post The post to edit.
 *
 * @param array $parsed_block {
 *     An associative array of the block being rendered. See WP_Block_Parser_Block.
 *
 *     @type string|null $blockName    Name of block.
 *     @type array       $attrs        Attributes from block comment delimiters.
 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
 *                                     have the same structure as this one.
 *     @type string      $innerHTML    HTML from inside block comment delimiters.
 *     @type array       $innerContent List of string fragments and null markers where
 *                                     inner blocks were found.
 * }
 * @return string String of rendered HTML.
 */
function render_block( $parsed_block ) {
	global $post;
	$parent_block = null;

	/**
	 * Allows render_block() to be short-circuited, by returning a non-null value.
	 *
	 * @since 5.1.0
	 * @since 5.9.0 The `$parent_block` parameter was added.
	 *
	 * @param string|null   $pre_render   The pre-rendered content. Default null.
	 * @param array         $parsed_block {
	 *     An associative array of the block being rendered. See WP_Block_Parser_Block.
	 *
	 *     @type string|null $blockName    Name of block.
	 *     @type array       $attrs        Attributes from block comment delimiters.
	 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
	 *                                     have the same structure as this one.
	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
	 *     @type array       $innerContent List of string fragments and null markers where
	 *                                     inner blocks were found.
	 * }
	 * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block.
	 */
	$pre_render = apply_filters( 'pre_render_block', null, $parsed_block, $parent_block );
	if ( ! is_null( $pre_render ) ) {
		return $pre_render;
	}

	$source_block = $parsed_block;

	/**
	 * Filters the block being rendered in render_block(), before it's processed.
	 *
	 * @since 5.1.0
	 * @since 5.9.0 The `$parent_block` parameter was added.
	 *
	 * @param array         $parsed_block {
	 *     An associative array of the block being rendered. See WP_Block_Parser_Block.
	 *
	 *     @type string|null $blockName    Name of block.
	 *     @type array       $attrs        Attributes from block comment delimiters.
	 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
	 *                                     have the same structure as this one.
	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
	 *     @type array       $innerContent List of string fragments and null markers where
	 *                                     inner blocks were found.
	 * }
	 * @param array         $source_block {
	 *     An un-modified copy of `$parsed_block`, as it appeared in the source content.
	 *     See WP_Block_Parser_Block.
	 *
	 *     @type string|null $blockName    Name of block.
	 *     @type array       $attrs        Attributes from block comment delimiters.
	 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
	 *                                     have the same structure as this one.
	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
	 *     @type array       $innerContent List of string fragments and null markers where
	 *                                     inner blocks were found.
	 * }
	 * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block.
	 */
	$parsed_block = apply_filters( 'render_block_data', $parsed_block, $source_block, $parent_block );

	$context = array();

	if ( $post instanceof WP_Post ) {
		$context['postId'] = $post->ID;

		/*
		 * The `postType` context is largely unnecessary server-side, since the ID
		 * is usually sufficient on its own. That being said, since a block's
		 * manifest is expected to be shared between the server and the client,
		 * it should be included to consistently fulfill the expectation.
		 */
		$context['postType'] = $post->post_type;
	}

	/**
	 * Filters the default context provided to a rendered block.
	 *
	 * @since 5.5.0
	 * @since 5.9.0 The `$parent_block` parameter was added.
	 *
	 * @param array         $context      Default context.
	 * @param array         $parsed_block {
	 *     An associative array of the block being rendered. See WP_Block_Parser_Block.
	 *
	 *     @type string|null $blockName    Name of block.
	 *     @type array       $attrs        Attributes from block comment delimiters.
	 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
	 *                                     have the same structure as this one.
	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
	 *     @type array       $innerContent List of string fragments and null markers where
	 *                                     inner blocks were found.
	 * }
	 * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block.
	 */
	$context = apply_filters( 'render_block_context', $context, $parsed_block, $parent_block );

	$block = new WP_Block( $parsed_block, $context );

	return $block->render();
}

/**
 * Parses blocks out of a content string.
 *
 * Given an HTML document, this function fully-parses block content, producing
 * a tree of blocks and their contents, as well as top-level non-block content,
 * which will appear as a block with no `blockName`.
 *
 * This function can be memory heavy for certain documents, particularly those
 * with deeply-nested blocks or blocks with extensive attribute values. Further,
 * this function must parse an entire document in one atomic operation.
 *
 * If the entire parsed document is not necessary, consider using {@see WP_Block_Processor}
 * instead, as it provides a streaming and low-overhead interface for finding blocks.
 *
 * @since 5.0.0
 *
 * @param string $content Post content.
 * @return array[] {
 *     Array of block structures.
 *
 *     @type array ...$0 {
 *         An associative array of a single parsed block object. See WP_Block_Parser_Block.
 *
 *         @type string|null $blockName    Name of block.
 *         @type array       $attrs        Attributes from block comment delimiters.
 *         @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
 *                                         have the same structure as this one.
 *         @type string      $innerHTML    HTML from inside block comment delimiters.
 *         @type array       $innerContent List of string fragments and null markers where
 *                                         inner blocks were found.
 *     }
 * }
 */
function parse_blocks( $content ) {
	/**
	 * Filter to allow plugins to replace the server-side block parser.
	 *
	 * @since 5.0.0
	 *
	 * @param string $parser_class Name of block parser class.
	 */
	$parser_class = apply_filters( 'block_parser_class', 'WP_Block_Parser' );

	$parser = new $parser_class();
	return $parser->parse( $content );
}

/**
 * Parses dynamic blocks out of `post_content` and re-renders them.
 *
 * @since 5.0.0
 *
 * @param string $content Post content.
 * @return string Updated post content.
 */
function do_blocks( $content ) {
	$blocks                = parse_blocks( $content );
	$top_level_block_count = count( $blocks );
	$output                = '';

	/**
	 * Parsed blocks consist of a list of top-level blocks. Those top-level
	 * blocks may themselves contain nested inner blocks. However, every
	 * top-level block is rendered independently, meaning there are no data
	 * dependencies between them.
	 *
	 * Ideally, therefore, the parser would only need to parse one complete
	 * top-level block at a time, render it, and move on. Unfortunately, this
	 * is not possible with {@see \parse_blocks()} because it must parse the
	 * entire given document at once.
	 *
	 * While the current implementation prevents this optimization, it’s still
	 * possible to reduce the peak memory use when calls to `render_block()`
	 * on those top-level blocks are memory-heavy (which many of them are).
	 * By setting each parsed block to `NULL` after rendering it, any memory
	 * allocated during the render will be freed and reused for the next block.
	 * Before making this change, that memory was retained and would lead to
	 * out-of-memory crashes for certain posts that now run with this change.
	 */
	for ( $i = 0; $i < $top_level_block_count; $i++ ) {
		$output      .= render_block( $blocks[ $i ] );
		$blocks[ $i ] = null;
	}

	// If there are blocks in this content, we shouldn't run wpautop() on it later.
	$priority = has_filter( 'the_content', 'wpautop' );
	if ( false !== $priority && doing_filter( 'the_content' ) && has_blocks( $content ) ) {
		remove_filter( 'the_content', 'wpautop', $priority );
		add_filter( 'the_content', '_restore_wpautop_hook', $priority + 1 );
	}

	return $output;
}

/**
 * If do_blocks() needs to remove wpautop() from the `the_content` filter, this re-adds it afterwards,
 * for subsequent `the_content` usage.
 *
 * @since 5.0.0
 * @access private
 *
 * @param string $content The post content running through this filter.
 * @return string The unmodified content.
 */
function _restore_wpautop_hook( $content ) {
	$current_priority = has_filter( 'the_content', '_restore_wpautop_hook' );

	add_filter( 'the_content', 'wpautop', $current_priority - 1 );
	remove_filter( 'the_content', '_restore_wpautop_hook', $current_priority );

	return $content;
}

/**
 * Returns the current version of the block format that the content string is using.
 *
 * If the string doesn't contain blocks, it returns 0.
 *
 * @since 5.0.0
 *
 * @param string $content Content to test.
 * @return int The block format version is 1 if the content contains one or more blocks, 0 otherwise.
 */
function block_version( $content ) {
	return has_blocks( $content ) ? 1 : 0;
}

/**
 * Registers a new block style.
 *
 * @since 5.3.0
 * @since 6.6.0 Added support for registering styles for multiple block types.
 *
 * @link https://developer.wordpress.org/block-editor/reference-guides/block-api/block-styles/
 *
 * @param string|string[] $block_name       Block type name including namespace or array of namespaced block type names.
 * @param array           $style_properties Array containing the properties of the style name, label,
 *                                          style_handle (name of the stylesheet to be enqueued),
 *                                          inline_style (string containing the CSS to be added),
 *                                          style_data (theme.json-like array to generate CSS from).
 *                                          See WP_Block_Styles_Registry::register().
 * @return bool True if the block style was registered with success and false otherwise.
 */
function register_block_style( $block_name, $style_properties ) {
	return WP_Block_Styles_Registry::get_instance()->register( $block_name, $style_properties );
}

/**
 * Unregisters a block style.
 *
 * @since 5.3.0
 *
 * @param string $block_name       Block type name including namespace.
 * @param string $block_style_name Block style name.
 * @return bool True if the block style was unregistered with success and false otherwise.
 */
function unregister_block_style( $block_name, $block_style_name ) {
	return WP_Block_Styles_Registry::get_instance()->unregister( $block_name, $block_style_name );
}

/**
 * Checks whether the current block type supports the feature requested.
 *
 * @since 5.8.0
 * @since 6.4.0 The `$feature` parameter now supports a string.
 *
 * @param WP_Block_Type $block_type    Block type to check for support.
 * @param string|array  $feature       Feature slug, or path to a specific feature to check support for.
 * @param mixed         $default_value Optional. Fallback value for feature support. Default false.
 * @return bool Whether the feature is supported.
 */
function block_has_support( $block_type, $feature, $default_value = false ) {
	$block_support = $default_value;
	if ( $block_type instanceof WP_Block_Type ) {
		if ( is_array( $feature ) && count( $feature ) === 1 ) {
			$feature = $feature[0];
		}

		if ( is_array( $feature ) ) {
			$block_support = _wp_array_get( $block_type->supports, $feature, $default_value );
		} elseif ( isset( $block_type->supports[ $feature ] ) ) {
			$block_support = $block_type->supports[ $feature ];
		}
	}

	return true === $block_support || is_array( $block_support );
}

/**
 * Converts typography keys declared under `supports.*` to `supports.typography.*`.
 *
 * Displays a `_doing_it_wrong()` notice when a block using the older format is detected.
 *
 * @since 5.8.0
 *
 * @param array $metadata Metadata for registering a block type.
 * @return array Filtered metadata for registering a block type.
 */
function wp_migrate_old_typography_shape( $metadata ) {
	if ( ! isset( $metadata['supports'] ) ) {
		return $metadata;
	}

	$typography_keys = array(
		'__experimentalFontFamily',
		'__experimentalFontStyle',
		'__experimentalFontWeight',
		'__experimentalLetterSpacing',
		'__experimentalTextDecoration',
		'__experimentalTextTransform',
		'fontSize',
		'lineHeight',
	);

	foreach ( $typography_keys as $typography_key ) {
		$support_for_key = isset( $metadata['supports'][ $typography_key ] ) ? $metadata['supports'][ $typography_key ] : null;

		if ( null !== $support_for_key ) {
			_doing_it_wrong(
				'register_block_type_from_metadata()',
				sprintf(
					/* translators: 1: Block type, 2: Typography supports key, e.g: fontSize, lineHeight, etc. 3: block.json, 4: Old metadata key, 5: New metadata key. */
					__( 'Block "%1$s" is declaring %2$s support in %3$s file under %4$s. %2$s support is now declared under %5$s.' ),
					$metadata['name'],
					"<code>$typography_key</code>",
					'<code>block.json</code>',
					"<code>supports.$typography_key</code>",
					"<code>supports.typography.$typography_key</code>"
				),
				'5.8.0'
			);

			_wp_array_set( $metadata['supports'], array( 'typography', $typography_key ), $support_for_key );
			unset( $metadata['supports'][ $typography_key ] );
		}
	}

	return $metadata;
}

/**
 * Helper function that constructs a WP_Query args array from
 * a `Query` block properties.
 *
 * It's used in Query Loop, Query Pagination Numbers and Query Pagination Next blocks.
 *
 * @since 5.8.0
 * @since 6.1.0 Added `query_loop_block_query_vars` filter and `parents` support in query.
 * @since 6.7.0 Added support for the `format` property in query.
 *
 * @param WP_Block $block Block instance.
 * @param int      $page  Current query's page.
 *
 * @return array Returns the constructed WP_Query arguments.
 */
function build_query_vars_from_query_block( $block, $page ) {
	$query = array(
		'post_type'    => 'post',
		'order'        => 'DESC',
		'orderby'      => 'date',
		'post__not_in' => array(),
		'tax_query'    => array(),
	);

	if ( isset( $block->context['query'] ) ) {
		if ( ! empty( $block->context['query']['postType'] ) ) {
			$post_type_param = $block->context['query']['postType'];
			if ( is_post_type_viewable( $post_type_param ) ) {
				$query['post_type'] = $post_type_param;
			}
		}
		if ( isset( $block->context['query']['sticky'] ) && ! empty( $block->context['query']['sticky'] ) ) {
			$sticky = get_option( 'sticky_posts' );
			if ( 'only' === $block->context['query']['sticky'] ) {
				/*
				 * Passing an empty array to post__in will return have_posts() as true (and all posts will be returned).
				 * Logic should be used before hand to determine if WP_Query should be used in the event that the array
				 * being passed to post__in is empty.
				 *
				 * @see https://core.trac.wordpress.org/ticket/28099
				 */
				$query['post__in']            = ! empty( $sticky ) ? $sticky : array( 0 );
				$query['ignore_sticky_posts'] = 1;
			} elseif ( 'exclude' === $block->context['query']['sticky'] ) {
				$query['post__not_in'] = array_merge( $query['post__not_in'], $sticky );
			} elseif ( 'ignore' === $block->context['query']['sticky'] ) {
				$query['ignore_sticky_posts'] = 1;
			}
		}
		if ( ! empty( $block->context['query']['exclude'] ) ) {
			$excluded_post_ids     = array_map( 'intval', $block->context['query']['exclude'] );
			$excluded_post_ids     = array_filter( $excluded_post_ids );
			$query['post__not_in'] = array_merge( $query['post__not_in'], $excluded_post_ids );
		}
		if (
			isset( $block->context['query']['perPage'] ) &&
			is_numeric( $block->context['query']['perPage'] )
		) {
			$per_page = absint( $block->context['query']['perPage'] );
			$offset   = 0;

			if (
				isset( $block->context['query']['offset'] ) &&
				is_numeric( $block->context['query']['offset'] )
			) {
				$offset = absint( $block->context['query']['offset'] );
			}

			$query['offset']         = ( $per_page * ( $page - 1 ) ) + $offset;
			$query['posts_per_page'] = $per_page;
		}
		// Migrate `categoryIds` and `tagIds` to `tax_query` for backwards compatibility.
		if ( ! empty( $block->context['query']['categoryIds'] ) || ! empty( $block->context['query']['tagIds'] ) ) {
			$tax_query_back_compat = array();
			if ( ! empty( $block->context['query']['categoryIds'] ) ) {
				$tax_query_back_compat[] = array(
					'taxonomy'         => 'category',
					'terms'            => array_filter( array_map( 'intval', $block->context['query']['categoryIds'] ) ),
					'include_children' => false,
				);
			}
			if ( ! empty( $block->context['query']['tagIds'] ) ) {
				$tax_query_back_compat[] = array(
					'taxonomy'         => 'post_tag',
					'terms'            => array_filter( array_map( 'intval', $block->context['query']['tagIds'] ) ),
					'include_children' => false,
				);
			}
			$query['tax_query'] = array_merge( $query['tax_query'], $tax_query_back_compat );
		}
		if ( ! empty( $block->context['query']['taxQuery'] ) ) {
			$tax_query = array();
			foreach ( $block->context['query']['taxQuery'] as $taxonomy => $terms ) {
				if ( is_taxonomy_viewable( $taxonomy ) && ! empty( $terms ) ) {
					$tax_query[] = array(
						'taxonomy'         => $taxonomy,
						'terms'            => array_filter( array_map( 'intval', $terms ) ),
						'include_children' => false,
					);
				}
			}
			$query['tax_query'] = array_merge( $query['tax_query'], $tax_query );
		}
		if ( ! empty( $block->context['query']['format'] ) && is_array( $block->context['query']['format'] ) ) {
			$formats = $block->context['query']['format'];
			/*
			 * Validate that the format is either `standard` or a supported post format.
			 * - First, add `standard` to the array of valid formats.
			 * - Then, remove any invalid formats.
			 */
			$valid_formats = array_merge( array( 'standard' ), get_post_format_slugs() );
			$formats       = array_intersect( $formats, $valid_formats );

			/*
			 * The relation needs to be set to `OR` since the request can contain
			 * two separate conditions. The user may be querying for items that have
			 * either the `standard` format or a specific format.
			 */
			$formats_query = array( 'relation' => 'OR' );

			/*
			 * The default post format, `standard`, is not stored in the database.
			 * If `standard` is part of the request, the query needs to exclude all post items that
			 * have a format assigned.
			 */
			if ( in_array( 'standard', $formats, true ) ) {
				$formats_query[] = array(
					'taxonomy' => 'post_format',
					'field'    => 'slug',
					'operator' => 'NOT EXISTS',
				);
				// Remove the `standard` format, since it cannot be queried.
				unset( $formats[ array_search( 'standard', $formats, true ) ] );
			}
			// Add any remaining formats to the formats query.
			if ( ! empty( $formats ) ) {
				// Add the `post-format-` prefix.
				$terms           = array_map(
					static function ( $format ) {
						return "post-format-$format";
					},
					$formats
				);
				$formats_query[] = array(
					'taxonomy' => 'post_format',
					'field'    => 'slug',
					'terms'    => $terms,
					'operator' => 'IN',
				);
			}

			/*
			 * Add `$formats_query` to `$query`, as long as it contains more than one key:
			 * If `$formats_query` only contains the initial `relation` key, there are no valid formats to query,
			 * and the query should not be modified.
			 */
			if ( count( $formats_query ) > 1 ) {
				// Enable filtering by both post formats and other taxonomies by combining them with `AND`.
				if ( empty( $query['tax_query'] ) ) {
					$query['tax_query'] = $formats_query;
				} else {
					$query['tax_query'] = array(
						'relation' => 'AND',
						$query['tax_query'],
						$formats_query,
					);
				}
			}
		}

		if (
			isset( $block->context['query']['order'] ) &&
				in_array( strtoupper( $block->context['query']['order'] ), array( 'ASC', 'DESC' ), true )
		) {
			$query['order'] = strtoupper( $block->context['query']['order'] );
		}
		if ( isset( $block->context['query']['orderBy'] ) ) {
			$query['orderby'] = $block->context['query']['orderBy'];
		}
		if (
			isset( $block->context['query']['author'] )
		) {
			if ( is_array( $block->context['query']['author'] ) ) {
				$query['author__in'] = array_filter( array_map( 'intval', $block->context['query']['author'] ) );
			} elseif ( is_string( $block->context['query']['author'] ) ) {
				$query['author__in'] = array_filter( array_map( 'intval', explode( ',', $block->context['query']['author'] ) ) );
			} elseif ( is_int( $block->context['query']['author'] ) && $block->context['query']['author'] > 0 ) {
				$query['author'] = $block->context['query']['author'];
			}
		}
		if ( ! empty( $block->context['query']['search'] ) ) {
			$query['s'] = $block->context['query']['search'];
		}
		if ( ! empty( $block->context['query']['parents'] ) && is_post_type_hierarchical( $query['post_type'] ) ) {
			$query['post_parent__in'] = array_unique( array_map( 'intval', $block->context['query']['parents'] ) );
		}
	}

	/**
	 * Filters the arguments which will be passed to `WP_Query` for the Query Loop Block.
	 *
	 * Anything to this filter should be compatible with the `WP_Query` API to form
	 * the query context which will be passed down to the Query Loop Block's children.
	 * This can help, for example, to include additional settings or meta queries not
	 * directly supported by the core Query Loop Block, and extend its capabilities.
	 *
	 * Please note that this will only influence the query that will be rendered on the
	 * front-end. The editor preview is not affected by this filter. Also, worth noting
	 * that the editor preview uses the REST API, so, ideally, one should aim to provide
	 * attributes which are also compatible with the REST API, in order to be able to
	 * implement identical queries on both sides.
	 *
	 * @since 6.1.0
	 *
	 * @param array    $query Array containing parameters for `WP_Query` as parsed by the block context.
	 * @param WP_Block $block Block instance.
	 * @param int      $page  Current query's page.
	 */
	return apply_filters( 'query_loop_block_query_vars', $query, $block, $page );
}

/**
 * Helper function that returns the proper pagination arrow HTML for
 * `QueryPaginationNext` and `QueryPaginationPrevious` blocks based
 * on the provided `paginationArrow` from `QueryPagination` context.
 *
 * It's used in QueryPaginationNext and QueryPaginationPrevious blocks.
 *
 * @since 5.9.0
 *
 * @param WP_Block $block   Block instance.
 * @param bool     $is_next Flag for handling `next/previous` blocks.
 * @return string|null The pagination arrow HTML or null if there is none.
 */
function get_query_pagination_arrow( $block, $is_next ) {
	$arrow_map = array(
		'none'    => '',
		'arrow'   => array(
			'next'     => '→',
			'previous' => '←',
		),
		'chevron' => array(
			'next'     => '»',
			'previous' => '«',
		),
	);
	if ( ! empty( $block->context['paginationArrow'] ) && array_key_exists( $block->context['paginationArrow'], $arrow_map ) && ! empty( $arrow_map[ $block->context['paginationArrow'] ] ) ) {
		$pagination_type = $is_next ? 'next' : 'previous';
		$arrow_attribute = $block->context['paginationArrow'];
		$arrow           = $arrow_map[ $block->context['paginationArrow'] ][ $pagination_type ];
		$arrow_classes   = "wp-block-query-pagination-$pagination_type-arrow is-arrow-$arrow_attribute";
		return "<span class='$arrow_classes' aria-hidden='true'>$arrow</span>";
	}
	return null;
}

/**
 * Helper function that constructs a comment query vars array from the passed
 * block properties.
 *
 * It's used with the Comment Query Loop inner blocks.
 *
 * @since 6.0.0
 *
 * @param WP_Block $block Block instance.
 * @return array Returns the comment query parameters to use with the
 *               WP_Comment_Query constructor.
 */
function build_comment_query_vars_from_block( $block ) {

	$comment_args = array(
		'orderby'       => 'comment_date_gmt',
		'order'         => 'ASC',
		'status'        => 'approve',
		'no_found_rows' => false,
	);

	if ( is_user_logged_in() ) {
		$comment_args['include_unapproved'] = array( get_current_user_id() );
	} else {
		$unapproved_email = wp_get_unapproved_comment_author_email();

		if ( $unapproved_email ) {
			$comment_args['include_unapproved'] = array( $unapproved_email );
		}
	}

	if ( ! empty( $block->context['postId'] ) ) {
		$comment_args['post_id'] = (int) $block->context['postId'];
	}

	if ( get_option( 'thread_comments' ) ) {
		$comment_args['hierarchical'] = 'threaded';
	} else {
		$comment_args['hierarchical'] = false;
	}

	if ( get_option( 'page_comments' ) === '1' || get_option( 'page_comments' ) === true ) {
		$per_page     = get_option( 'comments_per_page' );
		$default_page = get_option( 'default_comments_page' );
		if ( $per_page > 0 ) {
			$comment_args['number'] = $per_page;

			$page = (int) get_query_var( 'cpage' );
			if ( $page ) {
				$comment_args['paged'] = $page;
			} elseif ( 'oldest' === $default_page ) {
				$comment_args['paged'] = 1;
			} elseif ( 'newest' === $default_page ) {
				$max_num_pages = (int) ( new WP_Comment_Query( $comment_args ) )->max_num_pages;
				if ( 0 !== $max_num_pages ) {
					$comment_args['paged'] = $max_num_pages;
				}
			}
		}
	}

	return $comment_args;
}

/**
 * Helper function that returns the proper pagination arrow HTML for
 * `CommentsPaginationNext` and `CommentsPaginationPrevious` blocks based on the
 * provided `paginationArrow` from `CommentsPagination` context.
 *
 * It's used in CommentsPaginationNext and CommentsPaginationPrevious blocks.
 *
 * @since 6.0.0
 *
 * @param WP_Block $block           Block instance.
 * @param string   $pagination_type Optional. Type of the arrow we will be rendering.
 *                                  Accepts 'next' or 'previous'. Default 'next'.
 * @return string|null The pagination arrow HTML or null if there is none.
 */
function get_comments_pagination_arrow( $block, $pagination_type = 'next' ) {
	$arrow_map = array(
		'none'    => '',
		'arrow'   => array(
			'next'     => '→',
			'previous' => '←',
		),
		'chevron' => array(
			'next'     => '»',
			'previous' => '«',
		),
	);
	if ( ! empty( $block->context['comments/paginationArrow'] ) && ! empty( $arrow_map[ $block->context['comments/paginationArrow'] ][ $pagination_type ] ) ) {
		$arrow_attribute = $block->context['comments/paginationArrow'];
		$arrow           = $arrow_map[ $block->context['comments/paginationArrow'] ][ $pagination_type ];
		$arrow_classes   = "wp-block-comments-pagination-$pagination_type-arrow is-arrow-$arrow_attribute";
		return "<span class='$arrow_classes' aria-hidden='true'>$arrow</span>";
	}
	return null;
}

/**
 * Strips all HTML from the content of footnotes, and sanitizes the ID.
 *
 * This function expects slashed data on the footnotes content.
 *
 * @access private
 * @since 6.3.2
 *
 * @param string $footnotes JSON-encoded string of an array containing the content and ID of each footnote.
 * @return string Filtered content without any HTML on the footnote content and with the sanitized ID.
 */
function _wp_filter_post_meta_footnotes( $footnotes ) {
	$footnotes_decoded = json_decode( $footnotes, true );
	if ( ! is_array( $footnotes_decoded ) ) {
		return '';
	}
	$footnotes_sanitized = array();
	foreach ( $footnotes_decoded as $footnote ) {
		if ( ! empty( $footnote['content'] ) && ! empty( $footnote['id'] ) ) {
			$footnotes_sanitized[] = array(
				'id'      => sanitize_key( $footnote['id'] ),
				'content' => wp_unslash( wp_filter_post_kses( wp_slash( $footnote['content'] ) ) ),
			);
		}
	}
	return wp_json_encode( $footnotes_sanitized );
}

/**
 * Adds the filters for footnotes meta field.
 *
 * @access private
 * @since 6.3.2
 */
function _wp_footnotes_kses_init_filters() {
	add_filter( 'sanitize_post_meta_footnotes', '_wp_filter_post_meta_footnotes' );
}

/**
 * Removes the filters for footnotes meta field.
 *
 * @access private
 * @since 6.3.2
 */
function _wp_footnotes_remove_filters() {
	remove_filter( 'sanitize_post_meta_footnotes', '_wp_filter_post_meta_footnotes' );
}

/**
 * Registers the filter of footnotes meta field if the user does not have `unfiltered_html` capability.
 *
 * @access private
 * @since 6.3.2
 */
function _wp_footnotes_kses_init() {
	_wp_footnotes_remove_filters();
	if ( ! current_user_can( 'unfiltered_html' ) ) {
		_wp_footnotes_kses_init_filters();
	}
}

/**
 * Initializes the filters for footnotes meta field when imported data should be filtered.
 *
 * This filter is the last one being executed on {@see 'force_filtered_html_on_import'}.
 * If the input of the filter is true, it means we are in an import situation and should
 * enable kses, independently of the user capabilities. So in that case we call
 * _wp_footnotes_kses_init_filters().
 *
 * @access private
 * @since 6.3.2
 *
 * @param string $arg Input argument of the filter.
 * @return string Input argument of the filter.
 */
function _wp_footnotes_force_filtered_html_on_import_filter( $arg ) {
	// If `force_filtered_html_on_import` is true, we need to init the global styles kses filters.
	if ( $arg ) {
		_wp_footnotes_kses_init_filters();
	}
	return $arg;
}
<?php
/**
 * Defines constants and global variables that can be overridden, generally in wp-config.php.
 *
 * @package WordPress
 * @subpackage Multisite
 * @since 3.0.0
 */

/**
 * Defines Multisite upload constants.
 *
 * Exists for backward compatibility with legacy file-serving through
 * wp-includes/ms-files.php (wp-content/blogs.php in MU).
 *
 * @since 3.0.0
 */
function ms_upload_constants() {
	// This filter is attached in ms-default-filters.php but that file is not included during SHORTINIT.
	add_filter( 'default_site_option_ms_files_rewriting', '__return_true' );

	if ( ! get_site_option( 'ms_files_rewriting' ) ) {
		return;
	}

	// Base uploads dir relative to ABSPATH.
	if ( ! defined( 'UPLOADBLOGSDIR' ) ) {
		define( 'UPLOADBLOGSDIR', 'wp-content/blogs.dir' );
	}

	/*
	 * Note, the main site in a post-MU network uses wp-content/uploads.
	 * This is handled in wp_upload_dir() by ignoring UPLOADS for this case.
	 */
	if ( ! defined( 'UPLOADS' ) ) {
		$site_id = get_current_blog_id();

		define( 'UPLOADS', UPLOADBLOGSDIR . '/' . $site_id . '/files/' );

		// Uploads dir relative to ABSPATH.
		if ( 'wp-content/blogs.dir' === UPLOADBLOGSDIR && ! defined( 'BLOGUPLOADDIR' ) ) {
			define( 'BLOGUPLOADDIR', WP_CONTENT_DIR . '/blogs.dir/' . $site_id . '/files/' );
		}
	}
}

/**
 * Defines Multisite cookie constants.
 *
 * @since 3.0.0
 */
function ms_cookie_constants() {
	$current_network = get_network();

	/**
	 * @since 1.2.0
	 */
	if ( ! defined( 'COOKIEPATH' ) ) {
		define( 'COOKIEPATH', $current_network->path );
	}

	/**
	 * @since 1.5.0
	 */
	if ( ! defined( 'SITECOOKIEPATH' ) ) {
		define( 'SITECOOKIEPATH', $current_network->path );
	}

	/**
	 * @since 2.6.0
	 */
	if ( ! defined( 'ADMIN_COOKIE_PATH' ) ) {
		$site_path = parse_url( get_option( 'siteurl' ), PHP_URL_PATH );
		if ( ! is_subdomain_install() || is_string( $site_path ) && trim( $site_path, '/' ) ) {
			define( 'ADMIN_COOKIE_PATH', SITECOOKIEPATH );
		} else {
			define( 'ADMIN_COOKIE_PATH', SITECOOKIEPATH . 'wp-admin' );
		}
	}

	/**
	 * @since 2.0.0
	 */
	if ( ! defined( 'COOKIE_DOMAIN' ) && is_subdomain_install() ) {
		if ( ! empty( $current_network->cookie_domain ) ) {
			define( 'COOKIE_DOMAIN', '.' . $current_network->cookie_domain );
		} else {
			define( 'COOKIE_DOMAIN', '.' . $current_network->domain );
		}
	}
}

/**
 * Defines Multisite file constants.
 *
 * Exists for backward compatibility with legacy file-serving through
 * wp-includes/ms-files.php (wp-content/blogs.php in MU).
 *
 * @since 3.0.0
 */
function ms_file_constants() {
	/**
	 * Optional support for X-Sendfile header
	 *
	 * @since 3.0.0
	 */
	if ( ! defined( 'WPMU_SENDFILE' ) ) {
		define( 'WPMU_SENDFILE', false );
	}

	/**
	 * Optional support for X-Accel-Redirect header
	 *
	 * @since 3.0.0
	 */
	if ( ! defined( 'WPMU_ACCEL_REDIRECT' ) ) {
		define( 'WPMU_ACCEL_REDIRECT', false );
	}
}

/**
 * Defines Multisite subdomain constants and handles warnings and notices.
 *
 * VHOST is deprecated in favor of SUBDOMAIN_INSTALL, which is a bool.
 *
 * On first call, the constants are checked and defined. On second call,
 * we will have translations loaded and can trigger warnings easily.
 *
 * @since 3.0.0
 */
function ms_subdomain_constants() {
	static $subdomain_error      = null;
	static $subdomain_error_warn = null;

	if ( false === $subdomain_error ) {
		return;
	}

	if ( $subdomain_error ) {
		$vhost_deprecated = sprintf(
			/* translators: 1: VHOST, 2: SUBDOMAIN_INSTALL, 3: wp-config.php, 4: is_subdomain_install() */
			__( 'The constant %1$s <strong>is deprecated</strong>. Use the boolean constant %2$s in %3$s to enable a subdomain configuration. Use %4$s to check whether a subdomain configuration is enabled.' ),
			'<code>VHOST</code>',
			'<code>SUBDOMAIN_INSTALL</code>',
			'<code>wp-config.php</code>',
			'<code>is_subdomain_install()</code>'
		);

		if ( $subdomain_error_warn ) {
			wp_trigger_error(
				__FUNCTION__,
				sprintf(
					/* translators: 1: VHOST, 2: SUBDOMAIN_INSTALL */
					__( '<strong>Conflicting values for the constants %1$s and %2$s.</strong> The value of %2$s will be assumed to be your subdomain configuration setting.' ),
					'<code>VHOST</code>',
					'<code>SUBDOMAIN_INSTALL</code>'
				) . ' ' . $vhost_deprecated,
				E_USER_WARNING
			);
		} else {
			_deprecated_argument( 'define()', '3.0.0', $vhost_deprecated );
		}

		return;
	}

	if ( defined( 'SUBDOMAIN_INSTALL' ) && defined( 'VHOST' ) ) {
		$subdomain_error = true;
		if ( SUBDOMAIN_INSTALL !== ( 'yes' === VHOST ) ) {
			$subdomain_error_warn = true;
		}
	} elseif ( defined( 'SUBDOMAIN_INSTALL' ) ) {
		$subdomain_error = false;
		define( 'VHOST', SUBDOMAIN_INSTALL ? 'yes' : 'no' );
	} elseif ( defined( 'VHOST' ) ) {
		$subdomain_error = true;
		define( 'SUBDOMAIN_INSTALL', 'yes' === VHOST );
	} else {
		$subdomain_error = false;
		define( 'SUBDOMAIN_INSTALL', false );
		define( 'VHOST', 'no' );
	}
}
<?php
/**
 * These functions can be replaced via plugins. If plugins do not redefine these
 * functions, then these will be used instead.
 *
 * @package WordPress
 */

if ( ! function_exists( 'wp_set_current_user' ) ) :
	/**
	 * Changes the current user by ID or name.
	 *
	 * Set $id to null and specify a name if you do not know a user's ID.
	 *
	 * Some WordPress functionality is based on the current user and not based on
	 * the signed in user. Therefore, it opens the ability to edit and perform
	 * actions on users who aren't signed in.
	 *
	 * @since 2.0.3
	 *
	 * @global WP_User $current_user The current user object which holds the user data.
	 *
	 * @param int|null $id   User ID.
	 * @param string   $name User's username.
	 * @return WP_User Current user User object.
	 */
	function wp_set_current_user( $id, $name = '' ) {
		global $current_user;

		// If `$id` matches the current user, there is nothing to do.
		if ( isset( $current_user )
		&& ( $current_user instanceof WP_User )
		&& ( $id === $current_user->ID )
		&& ( null !== $id )
		) {
			return $current_user;
		}

		$current_user = new WP_User( $id, $name );

		setup_userdata( $current_user->ID );

		/**
		 * Fires after the current user is set.
		 *
		 * @since 2.0.1
		 */
		do_action( 'set_current_user' );

		return $current_user;
	}
endif;

if ( ! function_exists( 'wp_get_current_user' ) ) :
	/**
	 * Retrieves the current user object.
	 *
	 * Will set the current user, if the current user is not set. The current user
	 * will be set to the logged-in person. If no user is logged-in, then it will
	 * set the current user to 0, which is invalid and won't have any permissions.
	 *
	 * @since 2.0.3
	 *
	 * @see _wp_get_current_user()
	 * @global WP_User $current_user Checks if the current user is set.
	 *
	 * @return WP_User Current WP_User instance.
	 */
	function wp_get_current_user() {
		return _wp_get_current_user();
	}
endif;

if ( ! function_exists( 'get_userdata' ) ) :
	/**
	 * Retrieves user info by user ID.
	 *
	 * @since 0.71
	 *
	 * @param int $user_id User ID
	 * @return WP_User|false WP_User object on success, false on failure.
	 */
	function get_userdata( $user_id ) {
		return get_user_by( 'id', $user_id );
	}
endif;

if ( ! function_exists( 'get_user_by' ) ) :
	/**
	 * Retrieves user info by a given field.
	 *
	 * @since 2.8.0
	 * @since 4.4.0 Added 'ID' as an alias of 'id' for the `$field` parameter.
	 *
	 * @global WP_User $current_user The current user object which holds the user data.
	 *
	 * @param string     $field The field to retrieve the user with. id | ID | slug | email | login.
	 * @param int|string $value A value for $field. A user ID, slug, email address, or login name.
	 * @return WP_User|false WP_User object on success, false on failure.
	 */
	function get_user_by( $field, $value ) {
		$userdata = WP_User::get_data_by( $field, $value );

		if ( ! $userdata ) {
			return false;
		}

		$user = new WP_User();
		$user->init( $userdata );

		return $user;
	}
endif;

if ( ! function_exists( 'cache_users' ) ) :
	/**
	 * Retrieves info for user lists to prevent multiple queries by get_userdata().
	 *
	 * @since 3.0.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * @param int[] $user_ids User ID numbers list
	 */
	function cache_users( $user_ids ) {
		global $wpdb;

		update_meta_cache( 'user', $user_ids );

		$clean = _get_non_cached_ids( $user_ids, 'users' );

		if ( empty( $clean ) ) {
			return;
		}

		$list = implode( ',', $clean );

		$users = $wpdb->get_results( "SELECT * FROM $wpdb->users WHERE ID IN ($list)" );

		foreach ( $users as $user ) {
			update_user_caches( $user );
		}
	}
endif;

if ( ! function_exists( 'wp_mail' ) ) :
	/**
	 * Sends an email, similar to PHP's mail function.
	 *
	 * A true return value does not automatically mean that the user received the
	 * email successfully. It just only means that the method used was able to
	 * process the request without any errors.
	 *
	 * The default content type is `text/plain` which does not allow using HTML.
	 * However, you can set the content type of the email by using the
	 * {@see 'wp_mail_content_type'} filter.
	 *
	 * The default charset is based on the charset used on the blog. The charset can
	 * be set using the {@see 'wp_mail_charset'} filter.
	 *
	 * When using the `$embeds` parameter to embed images for use in HTML emails,
	 * reference the embedded file in your HTML with a `cid:` URL whose value
	 * matches the file's Content-ID. By default, the Content-ID (`cid`) used for
	 * each embedded file is the key in the embeds array, unless modified via the
	 * {@see 'wp_mail_embed_args'} filter. For example:
	 *
	 * `<img src="cid:0" alt="Logo">`
	 * `<img src="cid:my-image" alt="Image">`
	 *
	 * You may also customize the Content-ID for each file by using the
	 * {@see 'wp_mail_embed_args'} filter and setting the `cid` value.
	 *
	 * @since 1.2.1
	 * @since 5.5.0 is_email() is used for email validation,
	 *              instead of PHPMailer's default validator.
	 * @since 6.9.0 Added $embeds parameter.
	 * @since 6.9.0 Improved Content-Type header handling for multipart messages.
	 *
	 * @global PHPMailer\PHPMailer\PHPMailer $phpmailer
	 *
	 * @param string|string[] $to          Array or comma-separated list of email addresses to send message.
	 * @param string          $subject     Email subject.
	 * @param string          $message     Message contents.
	 * @param string|string[] $headers     Optional. Additional headers.
	 * @param string|string[] $attachments Optional. Paths to files to attach.
	 * @param string|string[] $embeds      Optional. Paths to files to embed.
	 * @return bool Whether the email was sent successfully.
	 */
	function wp_mail( $to, $subject, $message, $headers = '', $attachments = array(), $embeds = array() ) {
		// Compact the input, apply the filters, and extract them back out.

		/**
		 * Filters the wp_mail() arguments.
		 *
		 * @since 2.2.0
		 *
		 * @param array $args {
		 *     Array of the `wp_mail()` arguments.
		 *
		 *     @type string|string[] $to          Array or comma-separated list of email addresses to send message.
		 *     @type string          $subject     Email subject.
		 *     @type string          $message     Message contents.
		 *     @type string|string[] $headers     Additional headers.
		 *     @type string|string[] $attachments Paths to files to attach.
		 *     @type string|string[] $embeds      Paths to files to embed.
		 * }
		 */
		$atts = apply_filters( 'wp_mail', compact( 'to', 'subject', 'message', 'headers', 'attachments', 'embeds' ) );

		/**
		 * Filters whether to preempt sending an email.
		 *
		 * Returning a non-null value will short-circuit {@see wp_mail()}, returning
		 * that value instead. A boolean return value should be used to indicate whether
		 * the email was successfully sent.
		 *
		 * @since 5.7.0
		 *
		 * @param null|bool $return Short-circuit return value.
		 * @param array     $atts {
		 *     Array of the `wp_mail()` arguments.
		 *
		 *     @type string|string[] $to          Array or comma-separated list of email addresses to send message.
		 *     @type string          $subject     Email subject.
		 *     @type string          $message     Message contents.
		 *     @type string|string[] $headers     Additional headers.
		 *     @type string|string[] $attachments Paths to files to attach.
		 *     @type string|string[] $embeds      Paths to files to embed.
		 * }
		 */
		$pre_wp_mail = apply_filters( 'pre_wp_mail', null, $atts );

		if ( null !== $pre_wp_mail ) {
			return $pre_wp_mail;
		}

		if ( isset( $atts['to'] ) ) {
			$to = $atts['to'];
		}

		if ( ! is_array( $to ) ) {
			$to = explode( ',', $to );
		}

		if ( isset( $atts['subject'] ) ) {
			$subject = $atts['subject'];
		}

		if ( isset( $atts['message'] ) ) {
			$message = $atts['message'];
		}

		if ( isset( $atts['headers'] ) ) {
			$headers = $atts['headers'];
		}

		if ( isset( $atts['attachments'] ) ) {
			$attachments = $atts['attachments'];
		}

		if ( ! is_array( $attachments ) ) {
			$attachments = explode( "\n", str_replace( "\r\n", "\n", $attachments ) );
		}

		if ( isset( $atts['embeds'] ) ) {
			$embeds = $atts['embeds'];
		}

		if ( ! is_array( $embeds ) ) {
			$embeds = explode( "\n", str_replace( "\r\n", "\n", $embeds ) );
		}

		global $phpmailer;

		// (Re)create it, if it's gone missing.
		if ( ! ( $phpmailer instanceof PHPMailer\PHPMailer\PHPMailer ) ) {
			require_once ABSPATH . WPINC . '/PHPMailer/PHPMailer.php';
			require_once ABSPATH . WPINC . '/PHPMailer/SMTP.php';
			require_once ABSPATH . WPINC . '/PHPMailer/Exception.php';
			require_once ABSPATH . WPINC . '/class-wp-phpmailer.php';
			$phpmailer = new WP_PHPMailer( true );

			$phpmailer::$validator = static function ( $email ) {
				return (bool) is_email( $email );
			};
		}

		// Headers.
		$cc       = array();
		$bcc      = array();
		$reply_to = array();

		if ( empty( $headers ) ) {
			$headers = array();
		} else {
			if ( ! is_array( $headers ) ) {
				/*
				 * Explode the headers out, so this function can take
				 * both string headers and an array of headers.
				 */
				$tempheaders = explode( "\n", str_replace( "\r\n", "\n", $headers ) );
			} else {
				$tempheaders = $headers;
			}
			$headers = array();

			// If it's actually got contents.
			if ( ! empty( $tempheaders ) ) {
				// Iterate through the raw headers.
				foreach ( (array) $tempheaders as $header ) {
					if ( ! str_contains( $header, ':' ) ) {
						if ( false !== stripos( $header, 'boundary=' ) ) {
							$parts    = preg_split( '/boundary=/i', trim( $header ) );
							$boundary = trim( str_replace( array( "'", '"' ), '', $parts[1] ) );
						}
						continue;
					}
					// Explode them out.
					list( $name, $content ) = explode( ':', trim( $header ), 2 );

					// Cleanup crew.
					$name    = trim( $name );
					$content = trim( $content );

					switch ( strtolower( $name ) ) {
						// Mainly for legacy -- process a "From:" header if it's there.
						case 'from':
							$bracket_pos = strpos( $content, '<' );
							if ( false !== $bracket_pos ) {
								// Text before the bracketed email is the "From" name.
								if ( $bracket_pos > 0 ) {
									$from_name = substr( $content, 0, $bracket_pos );
									$from_name = str_replace( '"', '', $from_name );
									$from_name = trim( $from_name );
								}

								$from_email = substr( $content, $bracket_pos + 1 );
								$from_email = str_replace( '>', '', $from_email );
								$from_email = trim( $from_email );

								// Avoid setting an empty $from_email.
							} elseif ( '' !== trim( $content ) ) {
								$from_email = trim( $content );
							}
							break;
						case 'content-type':
							if ( str_contains( $content, ';' ) ) {
								list( $type, $charset_content ) = explode( ';', $content );
								$content_type                   = trim( $type );
								if ( false !== stripos( $charset_content, 'charset=' ) ) {
									$charset = trim( str_replace( array( 'charset=', '"' ), '', $charset_content ) );
								} elseif ( false !== stripos( $charset_content, 'boundary=' ) ) {
									$boundary = trim( str_replace( array( 'BOUNDARY=', 'boundary=', '"' ), '', $charset_content ) );
									$charset  = '';
									if ( preg_match( '~^multipart/(\S+)~', $content_type, $matches ) ) {
										$content_type = 'multipart/' . strtolower( $matches[1] ) . '; boundary="' . $boundary . '"';
									}
								}

								// Avoid setting an empty $content_type.
							} elseif ( '' !== trim( $content ) ) {
								$content_type = trim( $content );
							}
							break;
						case 'cc':
							$cc = array_merge( (array) $cc, explode( ',', $content ) );
							break;
						case 'bcc':
							$bcc = array_merge( (array) $bcc, explode( ',', $content ) );
							break;
						case 'reply-to':
							$reply_to = array_merge( (array) $reply_to, explode( ',', $content ) );
							break;
						default:
							// Add it to our grand headers array.
							$headers[ trim( $name ) ] = trim( $content );
							break;
					}
				}
			}
		}

		// Empty out the values that may be set.
		$phpmailer->clearAllRecipients();
		$phpmailer->clearAttachments();
		$phpmailer->clearCustomHeaders();
		$phpmailer->clearReplyTos();
		$phpmailer->Body    = '';
		$phpmailer->AltBody = '';

		/*
		 * Reset encoding to 8-bit, as it may have been automatically downgraded
		 * to 7-bit by PHPMailer (based on the body contents) in a previous call
		 * to wp_mail().
		 *
		 * See https://core.trac.wordpress.org/ticket/33972
		 */
		$phpmailer->Encoding = PHPMailer\PHPMailer\PHPMailer::ENCODING_8BIT;

		// Set "From" name and email.

		// If we don't have a name from the input headers.
		if ( ! isset( $from_name ) ) {
			$from_name = 'WordPress';
		}

		/*
		 * If we don't have an email from the input headers, default to wordpress@$sitename
		 * Some hosts will block outgoing mail from this address if it doesn't exist,
		 * but there's no easy alternative. Defaulting to admin_email might appear to be
		 * another option, but some hosts may refuse to relay mail from an unknown domain.
		 * See https://core.trac.wordpress.org/ticket/5007.
		 */
		if ( ! isset( $from_email ) ) {
			// Get the site domain and get rid of www.
			$sitename   = wp_parse_url( network_home_url(), PHP_URL_HOST );
			$from_email = 'wordpress@';

			if ( null !== $sitename ) {
				if ( str_starts_with( $sitename, 'www.' ) ) {
					$sitename = substr( $sitename, 4 );
				}

				$from_email .= $sitename;
			}
		}

		/**
		 * Filters the email address to send from.
		 *
		 * @since 2.2.0
		 *
		 * @param string $from_email Email address to send from.
		 */
		$from_email = apply_filters( 'wp_mail_from', $from_email );

		/**
		 * Filters the name to associate with the "from" email address.
		 *
		 * @since 2.3.0
		 *
		 * @param string $from_name Name associated with the "from" email address.
		 */
		$from_name = apply_filters( 'wp_mail_from_name', $from_name );

		try {
			$phpmailer->setFrom( $from_email, $from_name );
		} catch ( PHPMailer\PHPMailer\Exception $e ) {
			$mail_error_data                             = compact( 'to', 'subject', 'message', 'headers', 'attachments' );
			$mail_error_data['phpmailer_exception_code'] = $e->getCode();

			/** This filter is documented in wp-includes/pluggable.php */
			do_action( 'wp_mail_failed', new WP_Error( 'wp_mail_failed', $e->getMessage(), $mail_error_data ) );

			return false;
		}

		// Set mail's subject and body.
		$phpmailer->Subject = $subject;
		$phpmailer->Body    = $message;

		// Set destination addresses, using appropriate methods for handling addresses.
		$address_headers = compact( 'to', 'cc', 'bcc', 'reply_to' );

		foreach ( $address_headers as $address_header => $addresses ) {
			if ( empty( $addresses ) ) {
				continue;
			}

			foreach ( (array) $addresses as $address ) {
				try {
					// Break $recipient into name and address parts if in the format "Foo <bar@baz.com>".
					$recipient_name = '';

					if ( preg_match( '/(.*)<(.+)>/', $address, $matches ) ) {
						if ( count( $matches ) === 3 ) {
							$recipient_name = $matches[1];
							$address        = $matches[2];
						}
					}

					switch ( $address_header ) {
						case 'to':
							$phpmailer->addAddress( $address, $recipient_name );
							break;
						case 'cc':
							$phpmailer->addCC( $address, $recipient_name );
							break;
						case 'bcc':
							$phpmailer->addBCC( $address, $recipient_name );
							break;
						case 'reply_to':
							$phpmailer->addReplyTo( $address, $recipient_name );
							break;
					}
				} catch ( PHPMailer\PHPMailer\Exception $e ) {
					continue;
				}
			}
		}

		// Set to use PHP's mail().
		$phpmailer->isMail();

		// Set Content-Type and charset.

		// If we don't have a Content-Type from the input headers.
		if ( ! isset( $content_type ) ) {
			$content_type = 'text/plain';
		}

		/**
		 * Filters the wp_mail() content type.
		 *
		 * @since 2.3.0
		 *
		 * @param string $content_type Default wp_mail() content type.
		 */
		$content_type = apply_filters( 'wp_mail_content_type', $content_type );

		$phpmailer->ContentType = $content_type;

		// Set whether it's plaintext, depending on $content_type.
		if ( 'text/html' === $content_type ) {
			$phpmailer->isHTML( true );
		}

		// If we don't have a charset from the input headers.
		if ( ! isset( $charset ) ) {
			$charset = get_bloginfo( 'charset' );
		}

		/**
		 * Filters the default wp_mail() charset.
		 *
		 * @since 2.3.0
		 *
		 * @param string $charset Default email charset.
		 */
		$phpmailer->CharSet = apply_filters( 'wp_mail_charset', $charset );

		// Set custom headers.
		if ( ! empty( $headers ) ) {
			foreach ( (array) $headers as $name => $content ) {
				// Only add custom headers not added automatically by PHPMailer.
				if ( ! in_array( $name, array( 'MIME-Version', 'X-Mailer' ), true ) ) {
					try {
						$phpmailer->addCustomHeader( sprintf( '%1$s: %2$s', $name, $content ) );
					} catch ( PHPMailer\PHPMailer\Exception $e ) {
						continue;
					}
				}
			}
		}

		if ( ! empty( $attachments ) ) {
			foreach ( $attachments as $filename => $attachment ) {
				$filename = is_string( $filename ) ? $filename : '';

				try {
					$phpmailer->addAttachment( $attachment, $filename );
				} catch ( PHPMailer\PHPMailer\Exception $e ) {
					continue;
				}
			}
		}

		if ( ! empty( $embeds ) ) {
			foreach ( $embeds as $key => $embed_path ) {
				/**
				 * Filters the arguments for PHPMailer's addEmbeddedImage() method.
				 *
				 * @since 6.9.0
				 *
				 * @param array $args {
				 *     An array of arguments for `addEmbeddedImage()`.
				 *     @type string $path        The path to the file.
				 *     @type string $cid         The Content-ID of the image. Default: The key in the embeds array.
				 *     @type string $name        The filename of the image.
				 *     @type string $encoding    The encoding of the image. Default: 'base64'.
				 *     @type string $type        The MIME type of the image. Default: empty string, which lets PHPMailer auto-detect.
				 *     @type string $disposition The disposition of the image. Default: 'inline'.
				 * }
				 */
				$embed_args = apply_filters(
					'wp_mail_embed_args',
					array(
						'path'        => $embed_path,
						'cid'         => (string) $key,
						'name'        => basename( $embed_path ),
						'encoding'    => 'base64',
						'type'        => '',
						'disposition' => 'inline',
					)
				);

				try {
					$phpmailer->addEmbeddedImage(
						$embed_args['path'],
						$embed_args['cid'],
						$embed_args['name'],
						$embed_args['encoding'],
						$embed_args['type'],
						$embed_args['disposition']
					);
				} catch ( PHPMailer\PHPMailer\Exception $e ) {
					continue;
				}
			}
		}

		/**
		 * Fires after PHPMailer is initialized.
		 *
		 * @since 2.2.0
		 *
		 * @param PHPMailer $phpmailer The PHPMailer instance (passed by reference).
		 */
		do_action_ref_array( 'phpmailer_init', array( &$phpmailer ) );

		$mail_data = compact( 'to', 'subject', 'message', 'headers', 'attachments' );

		// Send!
		try {
			$send = $phpmailer->send();

			/**
			 * Fires after PHPMailer has successfully sent an email.
			 *
			 * The firing of this action does not necessarily mean that the recipient(s) received the
			 * email successfully. It only means that the `send` method above was able to
			 * process the request without any errors.
			 *
			 * @since 5.9.0
			 *
			 * @param array $mail_data {
			 *     An array containing the email recipient(s), subject, message, headers, and attachments.
			 *
			 *     @type string[] $to          Email addresses to send message.
			 *     @type string   $subject     Email subject.
			 *     @type string   $message     Message contents.
			 *     @type string[] $headers     Additional headers.
			 *     @type string[] $attachments Paths to files to attach.
			 *     @type string[] $embeds      Paths to files to embed.
			 * }
			 */
			do_action( 'wp_mail_succeeded', $mail_data );

			return $send;
		} catch ( PHPMailer\PHPMailer\Exception $e ) {
			$mail_data['phpmailer_exception_code'] = $e->getCode();

			/**
			 * Fires after a PHPMailer\PHPMailer\Exception is caught.
			 *
			 * @since 4.4.0
			 *
			 * @param WP_Error $error A WP_Error object with the PHPMailer\PHPMailer\Exception message, and an array
			 *                        containing the mail recipient, subject, message, headers, and attachments.
			 */
			do_action( 'wp_mail_failed', new WP_Error( 'wp_mail_failed', $e->getMessage(), $mail_data ) );

			return false;
		}
	}
endif;

if ( ! function_exists( 'wp_authenticate' ) ) :
	/**
	 * Authenticates a user, confirming the login credentials are valid.
	 *
	 * @since 2.5.0
	 * @since 4.5.0 `$username` now accepts an email address.
	 *
	 * @param string $username User's username or email address.
	 * @param string $password User's password.
	 * @return WP_User|WP_Error WP_User object if the credentials are valid,
	 *                          otherwise WP_Error.
	 */
	function wp_authenticate(
		$username,
		#[\SensitiveParameter]
		$password
	) {
		$username = sanitize_user( $username );
		$password = trim( $password );

		/**
		 * Filters whether a set of user login credentials are valid.
		 *
		 * A WP_User object is returned if the credentials authenticate a user.
		 * WP_Error or null otherwise.
		 *
		 * @since 2.8.0
		 * @since 4.5.0 `$username` now accepts an email address.
		 *
		 * @param null|WP_User|WP_Error $user     WP_User if the user is authenticated.
		 *                                        WP_Error or null otherwise.
		 * @param string                $username Username or email address.
		 * @param string                $password User password.
		 */
		$user = apply_filters( 'authenticate', null, $username, $password );

		if ( null === $user || false === $user ) {
			/*
			 * TODO: What should the error message be? (Or would these even happen?)
			 * Only needed if all authentication handlers fail to return anything.
			 */
			$user = new WP_Error( 'authentication_failed', __( '<strong>Error:</strong> Invalid username, email address or incorrect password.' ) );
		}

		$ignore_codes = array( 'empty_username', 'empty_password' );

		if ( is_wp_error( $user ) && ! in_array( $user->get_error_code(), $ignore_codes, true ) ) {
			$error = $user;

			/**
			 * Fires after a user login has failed.
			 *
			 * @since 2.5.0
			 * @since 4.5.0 The value of `$username` can now be an email address.
			 * @since 5.4.0 The `$error` parameter was added.
			 *
			 * @param string   $username Username or email address.
			 * @param WP_Error $error    A WP_Error object with the authentication failure details.
			 */
			do_action( 'wp_login_failed', $username, $error );
		}

		return $user;
	}
endif;

if ( ! function_exists( 'wp_logout' ) ) :
	/**
	 * Logs the current user out.
	 *
	 * @since 2.5.0
	 */
	function wp_logout() {
		$user_id = get_current_user_id();

		wp_destroy_current_session();
		wp_clear_auth_cookie();
		wp_set_current_user( 0 );

		/**
		 * Fires after a user is logged out.
		 *
		 * @since 1.5.0
		 * @since 5.5.0 Added the `$user_id` parameter.
		 *
		 * @param int $user_id ID of the user that was logged out.
		 */
		do_action( 'wp_logout', $user_id );
	}
endif;

if ( ! function_exists( 'wp_validate_auth_cookie' ) ) :
	/**
	 * Validates authentication cookie.
	 *
	 * The checks include making sure that the authentication cookie is set and
	 * pulling in the contents (if $cookie is not used).
	 *
	 * Makes sure the cookie is not expired. Verifies the hash in cookie is what is
	 * should be and compares the two.
	 *
	 * @since 2.5.0
	 *
	 * @global int $login_grace_period
	 *
	 * @param string $cookie Optional. If used, will validate contents instead of cookie's.
	 * @param string $scheme Optional. The cookie scheme to use: 'auth', 'secure_auth', or 'logged_in'.
	 *                       Note: This does *not* default to 'auth' like other cookie functions.
	 * @return int|false User ID if valid cookie, false if invalid.
	 */
	function wp_validate_auth_cookie( $cookie = '', $scheme = '' ) {
		$cookie_elements = wp_parse_auth_cookie( $cookie, $scheme );
		if ( ! $cookie_elements ) {
			/**
			 * Fires if an authentication cookie is malformed.
			 *
			 * @since 2.7.0
			 *
			 * @param string $cookie Malformed auth cookie.
			 * @param string $scheme Authentication scheme. Values include 'auth', 'secure_auth',
			 *                       or 'logged_in'.
			 */
			do_action( 'auth_cookie_malformed', $cookie, $scheme );
			return false;
		}

		$scheme     = $cookie_elements['scheme'];
		$username   = $cookie_elements['username'];
		$hmac       = $cookie_elements['hmac'];
		$token      = $cookie_elements['token'];
		$expiration = $cookie_elements['expiration'];

		$expired = (int) $expiration;

		// Allow a grace period for POST and Ajax requests.
		if ( wp_doing_ajax() || 'POST' === $_SERVER['REQUEST_METHOD'] ) {
			$expired += HOUR_IN_SECONDS;
		}

		// Quick check to see if an honest cookie has expired.
		if ( $expired < time() ) {
			/**
			 * Fires once an authentication cookie has expired.
			 *
			 * @since 2.7.0
			 *
			 * @param string[] $cookie_elements {
			 *     Authentication cookie components. None of the components should be assumed
			 *     to be valid as they come directly from a client-provided cookie value.
			 *
			 *     @type string $username   User's username.
			 *     @type string $expiration The time the cookie expires as a UNIX timestamp.
			 *     @type string $token      User's session token used.
			 *     @type string $hmac       The security hash for the cookie.
			 *     @type string $scheme     The cookie scheme to use.
			 * }
			 */
			do_action( 'auth_cookie_expired', $cookie_elements );
			return false;
		}

		$user = get_user_by( 'login', $username );
		if ( ! $user ) {
			/**
			 * Fires if a bad username is entered in the user authentication process.
			 *
			 * @since 2.7.0
			 *
			 * @param string[] $cookie_elements {
			 *     Authentication cookie components. None of the components should be assumed
			 *     to be valid as they come directly from a client-provided cookie value.
			 *
			 *     @type string $username   User's username.
			 *     @type string $expiration The time the cookie expires as a UNIX timestamp.
			 *     @type string $token      User's session token used.
			 *     @type string $hmac       The security hash for the cookie.
			 *     @type string $scheme     The cookie scheme to use.
			 * }
			 */
			do_action( 'auth_cookie_bad_username', $cookie_elements );
			return false;
		}

		if ( str_starts_with( $user->user_pass, '$P$' ) || str_starts_with( $user->user_pass, '$2y$' ) ) {
			// Retain previous behaviour of phpass or vanilla bcrypt hashed passwords.
			$pass_frag = substr( $user->user_pass, 8, 4 );
		} else {
			// Otherwise, use a substring from the end of the hash to avoid dealing with potentially long hash prefixes.
			$pass_frag = substr( $user->user_pass, -4 );
		}

		$key = wp_hash( $username . '|' . $pass_frag . '|' . $expiration . '|' . $token, $scheme );

		$hash = hash_hmac( 'sha256', $username . '|' . $expiration . '|' . $token, $key );

		if ( ! hash_equals( $hash, $hmac ) ) {
			/**
			 * Fires if a bad authentication cookie hash is encountered.
			 *
			 * @since 2.7.0
			 *
			 * @param string[] $cookie_elements {
			 *     Authentication cookie components. None of the components should be assumed
			 *     to be valid as they come directly from a client-provided cookie value.
			 *
			 *     @type string $username   User's username.
			 *     @type string $expiration The time the cookie expires as a UNIX timestamp.
			 *     @type string $token      User's session token used.
			 *     @type string $hmac       The security hash for the cookie.
			 *     @type string $scheme     The cookie scheme to use.
			 * }
			 */
			do_action( 'auth_cookie_bad_hash', $cookie_elements );
			return false;
		}

		$manager = WP_Session_Tokens::get_instance( $user->ID );
		if ( ! $manager->verify( $token ) ) {
			/**
			 * Fires if a bad session token is encountered.
			 *
			 * @since 4.0.0
			 *
			 * @param string[] $cookie_elements {
			 *     Authentication cookie components. None of the components should be assumed
			 *     to be valid as they come directly from a client-provided cookie value.
			 *
			 *     @type string $username   User's username.
			 *     @type string $expiration The time the cookie expires as a UNIX timestamp.
			 *     @type string $token      User's session token used.
			 *     @type string $hmac       The security hash for the cookie.
			 *     @type string $scheme     The cookie scheme to use.
			 * }
			 */
			do_action( 'auth_cookie_bad_session_token', $cookie_elements );
			return false;
		}

		// Ajax/POST grace period set above.
		if ( $expiration < time() ) {
			$GLOBALS['login_grace_period'] = 1;
		}

		/**
		 * Fires once an authentication cookie has been validated.
		 *
		 * @since 2.7.0
		 *
		 * @param string[] $cookie_elements {
		 *     Authentication cookie components.
		 *
		 *     @type string $username   User's username.
		 *     @type string $expiration The time the cookie expires as a UNIX timestamp.
		 *     @type string $token      User's session token used.
		 *     @type string $hmac       The security hash for the cookie.
		 *     @type string $scheme     The cookie scheme to use.
		 * }
		 * @param WP_User  $user            User object.
		 */
		do_action( 'auth_cookie_valid', $cookie_elements, $user );

		return $user->ID;
	}
endif;

if ( ! function_exists( 'wp_generate_auth_cookie' ) ) :
	/**
	 * Generates authentication cookie contents.
	 *
	 * @since 2.5.0
	 * @since 4.0.0 The `$token` parameter was added.
	 *
	 * @param int    $user_id    User ID.
	 * @param int    $expiration The time the cookie expires as a UNIX timestamp.
	 * @param string $scheme     Optional. The cookie scheme to use: 'auth', 'secure_auth', or 'logged_in'.
	 *                           Default 'auth'.
	 * @param string $token      User's session token to use for this cookie.
	 * @return string Authentication cookie contents. Empty string if user does not exist.
	 */
	function wp_generate_auth_cookie( $user_id, $expiration, $scheme = 'auth', $token = '' ) {
		$user = get_userdata( $user_id );
		if ( ! $user ) {
			return '';
		}

		if ( ! $token ) {
			$manager = WP_Session_Tokens::get_instance( $user_id );
			$token   = $manager->create( $expiration );
		}

		if ( str_starts_with( $user->user_pass, '$P$' ) || str_starts_with( $user->user_pass, '$2y$' ) ) {
			// Retain previous behaviour of phpass or vanilla bcrypt hashed passwords.
			$pass_frag = substr( $user->user_pass, 8, 4 );
		} else {
			// Otherwise, use a substring from the end of the hash to avoid dealing with potentially long hash prefixes.
			$pass_frag = substr( $user->user_pass, -4 );
		}

		$key = wp_hash( $user->user_login . '|' . $pass_frag . '|' . $expiration . '|' . $token, $scheme );

		$hash = hash_hmac( 'sha256', $user->user_login . '|' . $expiration . '|' . $token, $key );

		$cookie = $user->user_login . '|' . $expiration . '|' . $token . '|' . $hash;

		/**
		 * Filters the authentication cookie.
		 *
		 * @since 2.5.0
		 * @since 4.0.0 The `$token` parameter was added.
		 *
		 * @param string $cookie     Authentication cookie.
		 * @param int    $user_id    User ID.
		 * @param int    $expiration The time the cookie expires as a UNIX timestamp.
		 * @param string $scheme     Cookie scheme used. Accepts 'auth', 'secure_auth', or 'logged_in'.
		 * @param string $token      User's session token used.
		 */
		return apply_filters( 'auth_cookie', $cookie, $user_id, $expiration, $scheme, $token );
	}
endif;

if ( ! function_exists( 'wp_parse_auth_cookie' ) ) :
	/**
	 * Parses a cookie into its components.
	 *
	 * @since 2.7.0
	 * @since 4.0.0 The `$token` element was added to the return value.
	 *
	 * @param string $cookie Authentication cookie.
	 * @param string $scheme Optional. The cookie scheme to use: 'auth', 'secure_auth', or 'logged_in'.
	 * @return string[]|false {
	 *     Authentication cookie components. None of the components should be assumed
	 *     to be valid as they come directly from a client-provided cookie value. If
	 *     the cookie value is malformed, false is returned.
	 *
	 *     @type string $username   User's username.
	 *     @type string $expiration The time the cookie expires as a UNIX timestamp.
	 *     @type string $token      User's session token used.
	 *     @type string $hmac       The security hash for the cookie.
	 *     @type string $scheme     The cookie scheme to use.
	 * }
	 */
	function wp_parse_auth_cookie( $cookie = '', $scheme = '' ) {
		if ( empty( $cookie ) ) {
			switch ( $scheme ) {
				case 'auth':
					$cookie_name = AUTH_COOKIE;
					break;
				case 'secure_auth':
					$cookie_name = SECURE_AUTH_COOKIE;
					break;
				case 'logged_in':
					$cookie_name = LOGGED_IN_COOKIE;
					break;
				default:
					if ( is_ssl() ) {
						$cookie_name = SECURE_AUTH_COOKIE;
						$scheme      = 'secure_auth';
					} else {
						$cookie_name = AUTH_COOKIE;
						$scheme      = 'auth';
					}
			}

			if ( empty( $_COOKIE[ $cookie_name ] ) ) {
				return false;
			}
			$cookie = $_COOKIE[ $cookie_name ];
		}

		$cookie_elements = explode( '|', $cookie );
		if ( count( $cookie_elements ) !== 4 ) {
			return false;
		}

		list( $username, $expiration, $token, $hmac ) = $cookie_elements;

		return compact( 'username', 'expiration', 'token', 'hmac', 'scheme' );
	}
endif;

if ( ! function_exists( 'wp_set_auth_cookie' ) ) :
	/**
	 * Sets the authentication cookies for a given user ID.
	 *
	 * The `$remember` parameter controls cookie persistence:
	 * - If true, the cookie is persistent (default 14 days, filterable via {@see 'auth_cookie_expiration'}).
	 * - If false, the cookie is a browser session cookie (expires when the browser closes).
	 *   Internally, {@see 'auth_cookie_expiration'} is still applied, to expire the login after
	 *   two days or when the browser is closed, whichever occurs first.
	 *
	 * @since 2.5.0
	 * @since 4.3.0 Added the `$token` parameter.
	 *
	 * @param int         $user_id  User ID.
	 * @param bool        $remember Whether to remember the user.
	 * @param bool|string $secure   Whether the auth cookie should only be sent over HTTPS. Default is an empty
	 *                              string which means the value of `is_ssl()` will be used.
	 * @param string      $token    Optional. User's session token to use for this cookie.
	 */
	function wp_set_auth_cookie( $user_id, $remember = false, $secure = '', $token = '' ) {
		if ( $remember ) {
			/**
			 * Filters the duration of the authentication cookie expiration period.
			 *
			 * @since 2.8.0
			 *
			 * @param int  $length   Duration of the expiration period in seconds.
			 * @param int  $user_id  User ID.
			 * @param bool $remember Whether to remember the user login. Default false.
			 */
			$expiration = time() + apply_filters( 'auth_cookie_expiration', 14 * DAY_IN_SECONDS, $user_id, $remember );

			/*
			 * Ensure the browser will continue to send the cookie after the expiration time is reached.
			 * Needed for the login grace period in wp_validate_auth_cookie().
			 */
			$expire = $expiration + ( 12 * HOUR_IN_SECONDS );
		} else {
			/** This filter is documented in wp-includes/pluggable.php */
			$expiration = time() + apply_filters( 'auth_cookie_expiration', 2 * DAY_IN_SECONDS, $user_id, $remember );
			$expire     = 0;
		}

		if ( '' === $secure ) {
			$secure = is_ssl();
		}

		// Front-end cookie is secure when the auth cookie is secure and the site's home URL uses HTTPS.
		$secure_logged_in_cookie = $secure && 'https' === parse_url( get_option( 'home' ), PHP_URL_SCHEME );

		/**
		 * Filters whether the auth cookie should only be sent over HTTPS.
		 *
		 * @since 3.1.0
		 *
		 * @param bool $secure  Whether the cookie should only be sent over HTTPS.
		 * @param int  $user_id User ID.
		 */
		$secure = apply_filters( 'secure_auth_cookie', $secure, $user_id );

		/**
		 * Filters whether the logged in cookie should only be sent over HTTPS.
		 *
		 * @since 3.1.0
		 *
		 * @param bool $secure_logged_in_cookie Whether the logged in cookie should only be sent over HTTPS.
		 * @param int  $user_id                 User ID.
		 * @param bool $secure                  Whether the auth cookie should only be sent over HTTPS.
		 */
		$secure_logged_in_cookie = apply_filters( 'secure_logged_in_cookie', $secure_logged_in_cookie, $user_id, $secure );

		if ( $secure ) {
			$auth_cookie_name = SECURE_AUTH_COOKIE;
			$scheme           = 'secure_auth';
		} else {
			$auth_cookie_name = AUTH_COOKIE;
			$scheme           = 'auth';
		}

		if ( '' === $token ) {
			$manager = WP_Session_Tokens::get_instance( $user_id );
			$token   = $manager->create( $expiration );
		}

		$auth_cookie      = wp_generate_auth_cookie( $user_id, $expiration, $scheme, $token );
		$logged_in_cookie = wp_generate_auth_cookie( $user_id, $expiration, 'logged_in', $token );

		/**
		 * Fires immediately before the authentication cookie is set.
		 *
		 * @since 2.5.0
		 * @since 4.9.0 The `$token` parameter was added.
		 *
		 * @param string $auth_cookie Authentication cookie value.
		 * @param int    $expire      The time the login grace period expires as a UNIX timestamp.
		 *                            Default is 12 hours past the cookie's expiration time.
		 * @param int    $expiration  The time when the authentication cookie expires as a UNIX timestamp.
		 *                            Default is 14 days from now.
		 * @param int    $user_id     User ID.
		 * @param string $scheme      Authentication scheme. Values include 'auth' or 'secure_auth'.
		 * @param string $token       User's session token to use for this cookie.
		 */
		do_action( 'set_auth_cookie', $auth_cookie, $expire, $expiration, $user_id, $scheme, $token );

		/**
		 * Fires immediately before the logged-in authentication cookie is set.
		 *
		 * @since 2.6.0
		 * @since 4.9.0 The `$token` parameter was added.
		 *
		 * @param string $logged_in_cookie The logged-in cookie value.
		 * @param int    $expire           The time the login grace period expires as a UNIX timestamp.
		 *                                 Default is 12 hours past the cookie's expiration time.
		 * @param int    $expiration       The time when the logged-in authentication cookie expires as a UNIX timestamp.
		 *                                 Default is 14 days from now.
		 * @param int    $user_id          User ID.
		 * @param string $scheme           Authentication scheme. Default 'logged_in'.
		 * @param string $token            User's session token to use for this cookie.
		 */
		do_action( 'set_logged_in_cookie', $logged_in_cookie, $expire, $expiration, $user_id, 'logged_in', $token );

		/**
		 * Allows preventing auth cookies from actually being sent to the client.
		 *
		 * @since 4.7.4
		 * @since 6.2.0 The `$expire`, `$expiration`, `$user_id`, `$scheme`, and `$token` parameters were added.
		 *
		 * @param bool   $send       Whether to send auth cookies to the client. Default true.
		 * @param int    $expire     The time the login grace period expires as a UNIX timestamp.
		 *                           Default is 12 hours past the cookie's expiration time. Zero when clearing cookies.
		 * @param int    $expiration The time when the logged-in authentication cookie expires as a UNIX timestamp.
		 *                           Default is 14 days from now. Zero when clearing cookies.
		 * @param int    $user_id    User ID. Zero when clearing cookies.
		 * @param string $scheme     Authentication scheme. Values include 'auth' or 'secure_auth'.
		 *                           Empty string when clearing cookies.
		 * @param string $token      User's session token to use for this cookie. Empty string when clearing cookies.
		 */
		if ( ! apply_filters( 'send_auth_cookies', true, $expire, $expiration, $user_id, $scheme, $token ) ) {
			return;
		}

		setcookie( $auth_cookie_name, $auth_cookie, $expire, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN, $secure, true );
		setcookie( $auth_cookie_name, $auth_cookie, $expire, ADMIN_COOKIE_PATH, COOKIE_DOMAIN, $secure, true );
		setcookie( LOGGED_IN_COOKIE, $logged_in_cookie, $expire, COOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie, true );
		if ( COOKIEPATH !== SITECOOKIEPATH ) {
			setcookie( LOGGED_IN_COOKIE, $logged_in_cookie, $expire, SITECOOKIEPATH, COOKIE_DOMAIN, $secure_logged_in_cookie, true );
		}
	}
endif;

if ( ! function_exists( 'wp_clear_auth_cookie' ) ) :
	/**
	 * Removes all of the cookies associated with authentication.
	 *
	 * @since 2.5.0
	 */
	function wp_clear_auth_cookie() {
		/**
		 * Fires just before the authentication cookies are cleared.
		 *
		 * @since 2.7.0
		 */
		do_action( 'clear_auth_cookie' );

		/** This filter is documented in wp-includes/pluggable.php */
		if ( ! apply_filters( 'send_auth_cookies', true, 0, 0, 0, '', '' ) ) {
			return;
		}

		// Auth cookies.
		setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, ADMIN_COOKIE_PATH, COOKIE_DOMAIN );
		setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, ADMIN_COOKIE_PATH, COOKIE_DOMAIN );
		setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN );
		setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, PLUGINS_COOKIE_PATH, COOKIE_DOMAIN );
		setcookie( LOGGED_IN_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
		setcookie( LOGGED_IN_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );

		// Settings cookies.
		setcookie( 'wp-settings-' . get_current_user_id(), ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH );
		setcookie( 'wp-settings-time-' . get_current_user_id(), ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH );

		// Old cookies.
		setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
		setcookie( AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
		setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
		setcookie( SECURE_AUTH_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );

		// Even older cookies.
		setcookie( USER_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
		setcookie( PASS_COOKIE, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
		setcookie( USER_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );
		setcookie( PASS_COOKIE, ' ', time() - YEAR_IN_SECONDS, SITECOOKIEPATH, COOKIE_DOMAIN );

		// Post password cookie.
		setcookie( 'wp-postpass_' . COOKIEHASH, ' ', time() - YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN );
	}
endif;

if ( ! function_exists( 'is_user_logged_in' ) ) :
	/**
	 * Determines whether the current visitor is a logged in user.
	 *
	 * For more information on this and similar theme functions, check out
	 * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
	 * Conditional Tags} article in the Theme Developer Handbook.
	 *
	 * @since 2.0.0
	 *
	 * @return bool True if user is logged in, false if not logged in.
	 */
	function is_user_logged_in() {
		$user = wp_get_current_user();

		return $user->exists();
	}
endif;

if ( ! function_exists( 'auth_redirect' ) ) :
	/**
	 * Checks if a user is logged in, if not it redirects them to the login page.
	 *
	 * When this code is called from a page, it checks to see if the user viewing the page is logged in.
	 * If the user is not logged in, they are redirected to the login page. The user is redirected
	 * in such a way that, upon logging in, they will be sent directly to the page they were originally
	 * trying to access.
	 *
	 * @since 1.5.0
	 */
	function auth_redirect() {
		$secure = ( is_ssl() || force_ssl_admin() );

		/**
		 * Filters whether to use a secure authentication redirect.
		 *
		 * @since 3.1.0
		 *
		 * @param bool $secure Whether to use a secure authentication redirect. Default false.
		 */
		$secure = apply_filters( 'secure_auth_redirect', $secure );

		// If https is required and request is http, redirect.
		if ( $secure && ! is_ssl() && str_contains( $_SERVER['REQUEST_URI'], 'wp-admin' ) ) {
			if ( str_starts_with( $_SERVER['REQUEST_URI'], 'http' ) ) {
				wp_redirect( set_url_scheme( $_SERVER['REQUEST_URI'], 'https' ) );
				exit;
			} else {
				wp_redirect( 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
				exit;
			}
		}

		/**
		 * Filters the authentication redirect scheme.
		 *
		 * @since 2.9.0
		 *
		 * @param string $scheme Authentication redirect scheme. Default empty.
		 */
		$scheme = apply_filters( 'auth_redirect_scheme', '' );

		$user_id = wp_validate_auth_cookie( '', $scheme );
		if ( $user_id ) {
			/**
			 * Fires before the authentication redirect.
			 *
			 * @since 2.8.0
			 *
			 * @param int $user_id User ID.
			 */
			do_action( 'auth_redirect', $user_id );

			// If the user wants ssl but the session is not ssl, redirect.
			if ( ! $secure && get_user_option( 'use_ssl', $user_id ) && str_contains( $_SERVER['REQUEST_URI'], 'wp-admin' ) ) {
				if ( str_starts_with( $_SERVER['REQUEST_URI'], 'http' ) ) {
					wp_redirect( set_url_scheme( $_SERVER['REQUEST_URI'], 'https' ) );
					exit;
				} else {
					wp_redirect( 'https://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
					exit;
				}
			}

			return; // The cookie is good, so we're done.
		}

		// The cookie is no good, so force login.
		nocache_headers();

		if ( str_contains( $_SERVER['REQUEST_URI'], '/options.php' ) && wp_get_referer() ) {
			$redirect = wp_get_referer();
		} else {
			$redirect = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
		}

		$login_url = wp_login_url( $redirect, true );

		wp_redirect( $login_url );
		exit;
	}
endif;

if ( ! function_exists( 'check_admin_referer' ) ) :
	/**
	 * Ensures intent by verifying that a user was referred from another admin page with the correct security nonce.
	 *
	 * This function ensures the user intends to perform a given action, which helps protect against clickjacking style
	 * attacks. It verifies intent, not authorization, therefore it does not verify the user's capabilities. This should
	 * be performed with `current_user_can()` or similar.
	 *
	 * If the nonce value is invalid, the function will exit with an "Are You Sure?" style message.
	 *
	 * @since 1.2.0
	 * @since 2.5.0 The `$query_arg` parameter was added.
	 *
	 * @param int|string $action    The nonce action.
	 * @param string     $query_arg Optional. Key to check for nonce in `$_REQUEST`. Default '_wpnonce'.
	 * @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
	 *                   2 if the nonce is valid and generated between 12-24 hours ago.
	 *                   False if the nonce is invalid.
	 */
	function check_admin_referer( $action = -1, $query_arg = '_wpnonce' ) {
		if ( -1 === $action ) {
			_doing_it_wrong( __FUNCTION__, __( 'You should specify an action to be verified by using the first parameter.' ), '3.2.0' );
		}

		$adminurl = strtolower( admin_url() );
		$referer  = strtolower( wp_get_referer() );
		$result   = isset( $_REQUEST[ $query_arg ] ) ? wp_verify_nonce( $_REQUEST[ $query_arg ], $action ) : false;

		/**
		 * Fires once the admin request has been validated or not.
		 *
		 * @since 1.5.1
		 *
		 * @param string    $action The nonce action.
		 * @param false|int $result False if the nonce is invalid, 1 if the nonce is valid and generated between
		 *                          0-12 hours ago, 2 if the nonce is valid and generated between 12-24 hours ago.
		 */
		do_action( 'check_admin_referer', $action, $result );

		if ( ! $result && ! ( -1 === $action && str_starts_with( $referer, $adminurl ) ) ) {
			wp_nonce_ays( $action );
			die();
		}

		return $result;
	}
endif;

if ( ! function_exists( 'check_ajax_referer' ) ) :
	/**
	 * Verifies the Ajax request to prevent processing requests external of the blog.
	 *
	 * @since 2.0.3
	 *
	 * @param int|string   $action    Action nonce.
	 * @param false|string $query_arg Optional. Key to check for the nonce in `$_REQUEST` (since 2.5). If false,
	 *                                `$_REQUEST` values will be evaluated for '_ajax_nonce', and '_wpnonce'
	 *                                (in that order). Default false.
	 * @param bool         $stop      Optional. Whether to stop early when the nonce cannot be verified.
	 *                                Default true.
	 * @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
	 *                   2 if the nonce is valid and generated between 12-24 hours ago.
	 *                   False if the nonce is invalid.
	 */
	function check_ajax_referer( $action = -1, $query_arg = false, $stop = true ) {
		if ( -1 === $action ) {
			_doing_it_wrong( __FUNCTION__, __( 'You should specify an action to be verified by using the first parameter.' ), '4.7.0' );
		}

		$nonce = '';

		if ( $query_arg && isset( $_REQUEST[ $query_arg ] ) ) {
			$nonce = $_REQUEST[ $query_arg ];
		} elseif ( isset( $_REQUEST['_ajax_nonce'] ) ) {
			$nonce = $_REQUEST['_ajax_nonce'];
		} elseif ( isset( $_REQUEST['_wpnonce'] ) ) {
			$nonce = $_REQUEST['_wpnonce'];
		}

		$result = wp_verify_nonce( $nonce, $action );

		/**
		 * Fires once the Ajax request has been validated or not.
		 *
		 * @since 2.1.0
		 *
		 * @param string    $action The Ajax nonce action.
		 * @param false|int $result False if the nonce is invalid, 1 if the nonce is valid and generated between
		 *                          0-12 hours ago, 2 if the nonce is valid and generated between 12-24 hours ago.
		 */
		do_action( 'check_ajax_referer', $action, $result );

		if ( $stop && false === $result ) {
			if ( wp_doing_ajax() ) {
				wp_die( -1, 403 );
			} else {
				die( '-1' );
			}
		}

		return $result;
	}
endif;

if ( ! function_exists( 'wp_redirect' ) ) :
	/**
	 * Redirects to another page.
	 *
	 * Note: wp_redirect() does not exit automatically, and should almost always be
	 * followed by a call to `exit;`:
	 *
	 *     wp_redirect( $url );
	 *     exit;
	 *
	 * Exiting can also be selectively manipulated by using wp_redirect() as a conditional
	 * in conjunction with the {@see 'wp_redirect'} and {@see 'wp_redirect_status'} filters:
	 *
	 *     if ( wp_redirect( $url ) ) {
	 *         exit;
	 *     }
	 *
	 * @since 1.5.1
	 * @since 5.1.0 The `$x_redirect_by` parameter was added.
	 * @since 5.4.0 On invalid status codes, wp_die() is called.
	 *
	 * @global bool $is_IIS
	 *
	 * @param string       $location      The path or URL to redirect to.
	 * @param int          $status        Optional. HTTP response status code to use. Default '302' (Moved Temporarily).
	 * @param string|false $x_redirect_by Optional. The application doing the redirect or false to omit. Default 'WordPress'.
	 * @return bool False if the redirect was canceled, true otherwise.
	 */
	function wp_redirect( $location, $status = 302, $x_redirect_by = 'WordPress' ) {
		global $is_IIS;

		/**
		 * Filters the redirect location.
		 *
		 * @since 2.1.0
		 *
		 * @param string $location The path or URL to redirect to.
		 * @param int    $status   The HTTP response status code to use.
		 */
		$location = apply_filters( 'wp_redirect', $location, $status );

		/**
		 * Filters the redirect HTTP response status code to use.
		 *
		 * @since 2.3.0
		 *
		 * @param int    $status   The HTTP response status code to use.
		 * @param string $location The path or URL to redirect to.
		 */
		$status = apply_filters( 'wp_redirect_status', $status, $location );

		if ( ! $location ) {
			return false;
		}

		if ( $status < 300 || 399 < $status ) {
			wp_die( __( 'HTTP redirect status code must be a redirection code, 3xx.' ) );
		}

		$location = wp_sanitize_redirect( $location );

		if ( ! $is_IIS && 'cgi-fcgi' !== PHP_SAPI ) {
			status_header( $status ); // This causes problems on IIS and some FastCGI setups.
		}

		/**
		 * Filters the X-Redirect-By header.
		 *
		 * Allows applications to identify themselves when they're doing a redirect.
		 *
		 * @since 5.1.0
		 *
		 * @param string|false $x_redirect_by The application doing the redirect or false to omit the header.
		 * @param int          $status        Status code to use.
		 * @param string       $location      The path to redirect to.
		 */
		$x_redirect_by = apply_filters( 'x_redirect_by', $x_redirect_by, $status, $location );
		if ( is_string( $x_redirect_by ) ) {
			header( "X-Redirect-By: $x_redirect_by" );
		}

		header( "Location: $location", true, $status );

		return true;
	}
endif;

if ( ! function_exists( 'wp_sanitize_redirect' ) ) :
	/**
	 * Sanitizes a URL for use in a redirect.
	 *
	 * @since 2.3.0
	 *
	 * @param string $location The path to redirect to.
	 * @return string Redirect-sanitized URL.
	 */
	function wp_sanitize_redirect( $location ) {
		// Encode spaces.
		$location = str_replace( ' ', '%20', $location );

		$regex    = '/
		(
			(?: [\xC2-\xDF][\x80-\xBF]        # double-byte sequences   110xxxxx 10xxxxxx
			|   \xE0[\xA0-\xBF][\x80-\xBF]    # triple-byte sequences   1110xxxx 10xxxxxx * 2
			|   [\xE1-\xEC][\x80-\xBF]{2}
			|   \xED[\x80-\x9F][\x80-\xBF]
			|   [\xEE-\xEF][\x80-\xBF]{2}
			|   \xF0[\x90-\xBF][\x80-\xBF]{2} # four-byte sequences   11110xxx 10xxxxxx * 3
			|   [\xF1-\xF3][\x80-\xBF]{3}
			|   \xF4[\x80-\x8F][\x80-\xBF]{2}
		){1,40}                              # ...one or more times
		)/x';
		$location = preg_replace_callback( $regex, '_wp_sanitize_utf8_in_redirect', $location );
		$location = preg_replace( '|[^a-z0-9-~+_.?#=&;,/:%!*\[\]()@]|i', '', $location );
		$location = wp_kses_no_null( $location );

		// Remove %0D and %0A from location.
		$strip = array( '%0d', '%0a', '%0D', '%0A' );
		return _deep_replace( $strip, $location );
	}

	/**
	 * URL encodes UTF-8 characters in a URL.
	 *
	 * @ignore
	 * @since 4.2.0
	 * @access private
	 *
	 * @see wp_sanitize_redirect()
	 *
	 * @param array $matches RegEx matches against the redirect location.
	 * @return string URL-encoded version of the first RegEx match.
	 */
	function _wp_sanitize_utf8_in_redirect( $matches ) {
		return urlencode( $matches[0] );
	}
endif;

if ( ! function_exists( 'wp_safe_redirect' ) ) :
	/**
	 * Performs a safe (local) redirect, using wp_redirect().
	 *
	 * Checks whether the $location is using an allowed host, if it has an absolute
	 * path. A plugin can therefore set or remove allowed host(s) to or from the
	 * list.
	 *
	 * If the host is not allowed, then the redirect defaults to wp-admin on the siteurl
	 * instead. This prevents malicious redirects which redirect to another host,
	 * but only used in a few places.
	 *
	 * Note: wp_safe_redirect() does not exit automatically, and should almost always be
	 * followed by a call to `exit;`:
	 *
	 *     wp_safe_redirect( $url );
	 *     exit;
	 *
	 * Exiting can also be selectively manipulated by using wp_safe_redirect() as a conditional
	 * in conjunction with the {@see 'wp_redirect'} and {@see 'wp_redirect_status'} filters:
	 *
	 *     if ( wp_safe_redirect( $url ) ) {
	 *         exit;
	 *     }
	 *
	 * @since 2.3.0
	 * @since 5.1.0 The return value from wp_redirect() is now passed on, and the `$x_redirect_by` parameter was added.
	 *
	 * @param string       $location      The path or URL to redirect to.
	 * @param int          $status        Optional. HTTP response status code to use. Default '302' (Moved Temporarily).
	 * @param string|false $x_redirect_by Optional. The application doing the redirect or false to omit. Default 'WordPress'.
	 * @return bool False if the redirect was canceled, true otherwise.
	 */
	function wp_safe_redirect( $location, $status = 302, $x_redirect_by = 'WordPress' ) {

		// Need to look at the URL the way it will end up in wp_redirect().
		$location = wp_sanitize_redirect( $location );

		/**
		 * Filters the redirect fallback URL for when the provided redirect is not safe (local).
		 *
		 * @since 4.3.0
		 *
		 * @param string $fallback_url The fallback URL to use by default.
		 * @param int    $status       The HTTP response status code to use.
		 */
		$fallback_url = apply_filters( 'wp_safe_redirect_fallback', admin_url(), $status );

		$location = wp_validate_redirect( $location, $fallback_url );

		return wp_redirect( $location, $status, $x_redirect_by );
	}
endif;

if ( ! function_exists( 'wp_validate_redirect' ) ) :
	/**
	 * Validates a URL for use in a redirect.
	 *
	 * Checks whether the $location is using an allowed host, if it has an absolute
	 * path. A plugin can therefore set or remove allowed host(s) to or from the
	 * list.
	 *
	 * If the host is not allowed, then the redirect is to $fallback_url supplied.
	 *
	 * @since 2.8.1
	 *
	 * @param string $location     The redirect to validate.
	 * @param string $fallback_url The value to return if $location is not allowed.
	 * @return string Redirect-sanitized URL.
	 */
	function wp_validate_redirect( $location, $fallback_url = '' ) {
		$location = wp_sanitize_redirect( trim( $location, " \t\n\r\0\x08\x0B" ) );
		// Browsers will assume 'http' is your protocol, and will obey a redirect to a URL starting with '//'.
		if ( str_starts_with( $location, '//' ) ) {
			$location = 'http:' . $location;
		}

		/*
		 * In PHP 5 parse_url() may fail if the URL query part contains 'http://'.
		 * See https://bugs.php.net/bug.php?id=38143
		 */
		$cut  = strpos( $location, '?' );
		$test = $cut ? substr( $location, 0, $cut ) : $location;

		$lp = parse_url( $test );

		// Give up if malformed URL.
		if ( false === $lp ) {
			return $fallback_url;
		}

		// Allow only 'http' and 'https' schemes. No 'data:', etc.
		if ( isset( $lp['scheme'] ) && ! ( 'http' === $lp['scheme'] || 'https' === $lp['scheme'] ) ) {
			return $fallback_url;
		}

		if ( ! isset( $lp['host'] ) && ! empty( $lp['path'] ) && '/' !== $lp['path'][0] ) {
			$path = '';
			if ( ! empty( $_SERVER['REQUEST_URI'] ) ) {
				$path = dirname( parse_url( 'http://placeholder' . $_SERVER['REQUEST_URI'], PHP_URL_PATH ) . '?' );
				$path = wp_normalize_path( $path );
			}
			$location = '/' . ltrim( $path . '/', '/' ) . $location;
		}

		/*
		 * Reject if certain components are set but host is not.
		 * This catches URLs like https:host.com for which parse_url() does not set the host field.
		 */
		if ( ! isset( $lp['host'] ) && ( isset( $lp['scheme'] ) || isset( $lp['user'] ) || isset( $lp['pass'] ) || isset( $lp['port'] ) ) ) {
			return $fallback_url;
		}

		// Reject malformed components parse_url() can return on odd inputs.
		foreach ( array( 'user', 'pass', 'host' ) as $component ) {
			if ( isset( $lp[ $component ] ) && strpbrk( $lp[ $component ], ':/?#@' ) ) {
				return $fallback_url;
			}
		}

		$wpp = parse_url( home_url() );

		/**
		 * Filters the list of allowed hosts to redirect to.
		 *
		 * @since 2.3.0
		 *
		 * @param string[] $hosts An array of allowed host names.
		 * @param string   $host  The host name of the redirect destination; empty string if not set.
		 */
		$allowed_hosts = (array) apply_filters( 'allowed_redirect_hosts', array( $wpp['host'] ), isset( $lp['host'] ) ? $lp['host'] : '' );

		if ( isset( $lp['host'] ) && ( ! in_array( $lp['host'], $allowed_hosts, true ) && strtolower( $wpp['host'] ) !== $lp['host'] ) ) {
			$location = $fallback_url;
		}

		return $location;
	}
endif;

if ( ! function_exists( 'wp_notify_postauthor' ) ) :
	/**
	 * Notifies an author (and/or others) of a comment/trackback/pingback on a post.
	 *
	 * @since 1.0.0
	 *
	 * @param int|WP_Comment $comment_id Comment ID or WP_Comment object.
	 * @param string         $deprecated Not used.
	 * @return bool True on completion. False if no email addresses were specified.
	 */
	function wp_notify_postauthor( $comment_id, $deprecated = null ) {
		if ( null !== $deprecated ) {
			_deprecated_argument( __FUNCTION__, '3.8.0' );
		}

		$comment = get_comment( $comment_id );
		if ( empty( $comment ) || empty( $comment->comment_post_ID ) ) {
			return false;
		}

		$post   = get_post( $comment->comment_post_ID );
		$author = get_userdata( $post->post_author );

		// Who to notify? By default, just the post author, but others can be added.
		$emails = array();
		if ( $author ) {
			$emails[] = $author->user_email;
		}

		/**
		 * Filters the list of email addresses to receive a comment notification.
		 *
		 * By default, only post authors are notified of comments. This filter allows
		 * others to be added.
		 *
		 * @since 3.7.0
		 *
		 * @param string[] $emails     An array of email addresses to receive a comment notification.
		 * @param string   $comment_id The comment ID as a numeric string.
		 */
		$emails = apply_filters( 'comment_notification_recipients', $emails, $comment->comment_ID );
		$emails = array_filter( $emails );

		// If there are no addresses to send the comment to, bail.
		if ( ! count( $emails ) ) {
			return false;
		}

		// Facilitate unsetting below without knowing the keys.
		$emails = array_flip( $emails );

		/**
		 * Filters whether to notify comment authors of their comments on their own posts.
		 *
		 * By default, comment authors aren't notified of their comments on their own
		 * posts. This filter allows you to override that.
		 *
		 * @since 3.8.0
		 *
		 * @param bool   $notify     Whether to notify the post author of their own comment.
		 *                           Default false.
		 * @param string $comment_id The comment ID as a numeric string.
		 */
		$notify_author = apply_filters( 'comment_notification_notify_author', false, $comment->comment_ID );

		// The comment was left by the author.
		if ( $author && ! $notify_author && (int) $comment->user_id === (int) $post->post_author ) {
			unset( $emails[ $author->user_email ] );
		}

		// The author moderated a comment on their own post.
		if ( $author && ! $notify_author && get_current_user_id() === (int) $post->post_author ) {
			unset( $emails[ $author->user_email ] );
		}

		// The post author is no longer a member of the blog.
		if ( $author && ! $notify_author && ! user_can( $post->post_author, 'read_post', $post->ID ) ) {
			unset( $emails[ $author->user_email ] );
		}

		// If there's no email to send the comment to, bail, otherwise flip array back around for use below.
		if ( ! count( $emails ) ) {
			return false;
		} else {
			$emails = array_flip( $emails );
		}

		$comment_author_domain = '';
		if ( WP_Http::is_ip_address( $comment->comment_author_IP ) ) {
			$comment_author_domain = gethostbyaddr( $comment->comment_author_IP );
		}

		/*
		 * The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
		 * We want to reverse this for the plain text arena of emails.
		 */
		$blogname        = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
		$comment_content = wp_specialchars_decode( $comment->comment_content );

		$wp_email = 'wordpress@' . preg_replace( '#^www\.#', '', wp_parse_url( network_home_url(), PHP_URL_HOST ) );

		if ( '' === $comment->comment_author ) {
			$from = "From: \"$blogname\" <$wp_email>";
			if ( '' !== $comment->comment_author_email ) {
				$reply_to = "Reply-To: $comment->comment_author_email";
			}
		} else {
			$from = "From: \"$comment->comment_author\" <$wp_email>";
			if ( '' !== $comment->comment_author_email ) {
				$reply_to = "Reply-To: \"$comment->comment_author_email\" <$comment->comment_author_email>";
			}
		}

		$message_headers = "$from\n"
		. 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n";

		if ( isset( $reply_to ) ) {
			$message_headers .= $reply_to . "\n";
		}

		/**
		 * Filters the comment notification email headers.
		 *
		 * @since 1.5.2
		 *
		 * @param string $message_headers Headers for the comment notification email.
		 * @param string $comment_id      Comment ID as a numeric string.
		 */
		$message_headers = apply_filters( 'comment_notification_headers', $message_headers, $comment->comment_ID );

		foreach ( $emails as $email ) {
			$user = get_user_by( 'email', $email );

			if ( $user ) {
				$switched_locale = switch_to_user_locale( $user->ID );
			} else {
				$switched_locale = switch_to_locale( get_locale() );
			}

			switch ( $comment->comment_type ) {
				case 'trackback':
					/* translators: %s: Post title. */
					$notify_message = sprintf( __( 'New trackback on your post "%s"' ), $post->post_title ) . "\r\n";
					/* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
					$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
					/* translators: %s: Trackback/pingback/comment author URL. */
					$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
					/* translators: %s: Comment text. */
					$notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
					$notify_message .= __( 'You can see all trackbacks on this post here:' ) . "\r\n";
					/* translators: Trackback notification email subject. 1: Site title, 2: Post title. */
					$subject = sprintf( __( '[%1$s] Trackback: "%2$s"' ), $blogname, $post->post_title );
					break;

				case 'pingback':
					/* translators: %s: Post title. */
					$notify_message = sprintf( __( 'New pingback on your post "%s"' ), $post->post_title ) . "\r\n";
					/* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
					$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
					/* translators: %s: Trackback/pingback/comment author URL. */
					$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
					/* translators: %s: Comment text. */
					$notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
					$notify_message .= __( 'You can see all pingbacks on this post here:' ) . "\r\n";
					/* translators: Pingback notification email subject. 1: Site title, 2: Post title. */
					$subject = sprintf( __( '[%1$s] Pingback: "%2$s"' ), $blogname, $post->post_title );
					break;

				case 'note':
					/* translators: %s: Post title. */
					$notify_message = sprintf( __( 'New note on your post "%s"' ), $post->post_title ) . "\r\n";
					/* translators: 1: Note author's name, 2: Note author's IP address, 3: Note author's hostname. */
					$notify_message .= sprintf( __( 'Author: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
					/* translators: %s: Note author email. */
					$notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "\r\n";
					/* translators: %s: Note text. */
					$notify_message .= sprintf( __( 'Note: %s' ), "\r\n" . ( empty( $comment_content ) ? __( 'resolved/reopened' ) : $comment_content ) ) . "\r\n\r\n";
					$notify_message .= __( 'You can see all notes on this post here:' ) . "\r\n";
					/* translators: Note notification email subject. 1: Site title, 2: Post title. */
					$subject = sprintf( __( '[%1$s] Note: "%2$s"' ), $blogname, $post->post_title );
					break;

				default: // Comments.
					/* translators: %s: Post title. */
					$notify_message = sprintf( __( 'New comment on your post "%s"' ), $post->post_title ) . "\r\n";
					/* translators: 1: Comment author's name, 2: Comment author's IP address, 3: Comment author's hostname. */
					$notify_message .= sprintf( __( 'Author: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
					/* translators: %s: Comment author email. */
					$notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "\r\n";
					/* translators: %s: Trackback/pingback/comment author URL. */
					$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";

					if ( $comment->comment_parent && user_can( $post->post_author, 'edit_comment', $comment->comment_parent ) ) {
						/* translators: Comment moderation. %s: Parent comment edit URL. */
						$notify_message .= sprintf( __( 'In reply to: %s' ), admin_url( "comment.php?action=editcomment&c={$comment->comment_parent}#wpbody-content" ) ) . "\r\n";
					}

					/* translators: %s: Comment text. */
					$notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
					$notify_message .= __( 'You can see all comments on this post here:' ) . "\r\n";
					/* translators: Comment notification email subject. 1: Site title, 2: Post title. */
					$subject = sprintf( __( '[%1$s] Comment: "%2$s"' ), $blogname, $post->post_title );
					break;
			}

			/* translators: %s: Comment URL. */
			if ( 'note' === $comment->comment_type ) {
				$notify_message .= get_edit_post_link( $comment->comment_post_ID, 'url' ) . "\r\n";
			} else {
				$notify_message .= get_permalink( $comment->comment_post_ID ) . "#comments\r\n\r\n";
				$notify_message .= sprintf( __( 'Permalink: %s' ), get_comment_link( $comment ) ) . "\r\n";
			}

			if ( 'note' !== $comment->comment_type && user_can( $post->post_author, 'edit_comment', $comment->comment_ID ) ) {
				if ( EMPTY_TRASH_DAYS ) {
					/* translators: Comment moderation. %s: Comment action URL. */
					$notify_message .= sprintf( __( 'Trash it: %s' ), admin_url( "comment.php?action=trash&c={$comment->comment_ID}#wpbody-content" ) ) . "\r\n";
				} else {
					/* translators: Comment moderation. %s: Comment action URL. */
					$notify_message .= sprintf( __( 'Delete it: %s' ), admin_url( "comment.php?action=delete&c={$comment->comment_ID}#wpbody-content" ) ) . "\r\n";
				}
				/* translators: Comment moderation. %s: Comment action URL. */
				$notify_message .= sprintf( __( 'Spam it: %s' ), admin_url( "comment.php?action=spam&c={$comment->comment_ID}#wpbody-content" ) ) . "\r\n";
			}

			/**
			 * Filters the comment notification email text.
			 *
			 * @since 1.5.2
			 *
			 * @param string $notify_message The comment notification email text.
			 * @param string $comment_id     Comment ID as a numeric string.
			 */
			$notify_message = apply_filters( 'comment_notification_text', $notify_message, $comment->comment_ID );

			/**
			 * Filters the comment notification email subject.
			 *
			 * @since 1.5.2
			 *
			 * @param string $subject    The comment notification email subject.
			 * @param string $comment_id Comment ID as a numeric string.
			 */
			$subject = apply_filters( 'comment_notification_subject', $subject, $comment->comment_ID );

			wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers );

			if ( $switched_locale ) {
				restore_previous_locale();
			}
		}

		return true;
	}
endif;

if ( ! function_exists( 'wp_notify_moderator' ) ) :
	/**
	 * Notifies the moderator of the site about a new comment that is awaiting approval.
	 *
	 * @since 1.0.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * Uses the {@see 'notify_moderator'} filter to determine whether the site moderator
	 * should be notified, overriding the site setting.
	 *
	 * @param int $comment_id Comment ID.
	 * @return true Always returns true.
	 */
	function wp_notify_moderator( $comment_id ) {
		global $wpdb;

		$maybe_notify = get_option( 'moderation_notify' );

		/**
		 * Filters whether to send the site moderator email notifications, overriding the site setting.
		 *
		 * @since 4.4.0
		 *
		 * @param bool $maybe_notify Whether to notify blog moderator.
		 * @param int  $comment_id   The ID of the comment for the notification.
		 */
		$maybe_notify = apply_filters( 'notify_moderator', $maybe_notify, $comment_id );

		if ( ! $maybe_notify ) {
			return true;
		}

		$comment = get_comment( $comment_id );
		$post    = get_post( $comment->comment_post_ID );
		$user    = get_userdata( $post->post_author );
		// Send to the administration and to the post author if the author can modify the comment.
		$emails = array( get_option( 'admin_email' ) );
		if ( $user && user_can( $user->ID, 'edit_comment', $comment_id ) && ! empty( $user->user_email ) ) {
			if ( 0 !== strcasecmp( $user->user_email, get_option( 'admin_email' ) ) ) {
				$emails[] = $user->user_email;
			}
		}

		$comment_author_domain = '';
		if ( WP_Http::is_ip_address( $comment->comment_author_IP ) ) {
			$comment_author_domain = gethostbyaddr( $comment->comment_author_IP );
		}

		$comments_waiting = $wpdb->get_var( "SELECT COUNT(*) FROM $wpdb->comments WHERE comment_approved = '0'" );

		/*
		 * The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
		 * We want to reverse this for the plain text arena of emails.
		 */
		$blogname        = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );
		$comment_content = wp_specialchars_decode( $comment->comment_content );

		$message_headers = '';

		/**
		 * Filters the list of recipients for comment moderation emails.
		 *
		 * @since 3.7.0
		 *
		 * @param string[] $emails     List of email addresses to notify for comment moderation.
		 * @param int      $comment_id Comment ID.
		 */
		$emails = apply_filters( 'comment_moderation_recipients', $emails, $comment_id );

		/**
		 * Filters the comment moderation email headers.
		 *
		 * @since 2.8.0
		 *
		 * @param string $message_headers Headers for the comment moderation email.
		 * @param int    $comment_id      Comment ID.
		 */
		$message_headers = apply_filters( 'comment_moderation_headers', $message_headers, $comment_id );

		foreach ( $emails as $email ) {
			$user = get_user_by( 'email', $email );

			if ( $user ) {
				$switched_locale = switch_to_user_locale( $user->ID );
			} else {
				$switched_locale = switch_to_locale( get_locale() );
			}

			switch ( $comment->comment_type ) {
				case 'trackback':
					/* translators: %s: Post title. */
					$notify_message  = sprintf( __( 'A new trackback on the post "%s" is waiting for your approval' ), $post->post_title ) . "\r\n";
					$notify_message .= get_permalink( $comment->comment_post_ID ) . "\r\n\r\n";
					/* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
					$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
					/* translators: %s: Trackback/pingback/comment author URL. */
					$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
					$notify_message .= __( 'Trackback excerpt: ' ) . "\r\n" . $comment_content . "\r\n\r\n";
					break;

				case 'pingback':
					/* translators: %s: Post title. */
					$notify_message  = sprintf( __( 'A new pingback on the post "%s" is waiting for your approval' ), $post->post_title ) . "\r\n";
					$notify_message .= get_permalink( $comment->comment_post_ID ) . "\r\n\r\n";
					/* translators: 1: Trackback/pingback website name, 2: Website IP address, 3: Website hostname. */
					$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
					/* translators: %s: Trackback/pingback/comment author URL. */
					$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
					$notify_message .= __( 'Pingback excerpt: ' ) . "\r\n" . $comment_content . "\r\n\r\n";
					break;

				default: // Comments.
					/* translators: %s: Post title. */
					$notify_message  = sprintf( __( 'A new comment on the post "%s" is waiting for your approval' ), $post->post_title ) . "\r\n";
					$notify_message .= get_permalink( $comment->comment_post_ID ) . "\r\n\r\n";
					/* translators: 1: Comment author's name, 2: Comment author's IP address, 3: Comment author's hostname. */
					$notify_message .= sprintf( __( 'Author: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
					/* translators: %s: Comment author email. */
					$notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "\r\n";
					/* translators: %s: Trackback/pingback/comment author URL. */
					$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";

					if ( $comment->comment_parent ) {
						/* translators: Comment moderation. %s: Parent comment edit URL. */
						$notify_message .= sprintf( __( 'In reply to: %s' ), admin_url( "comment.php?action=editcomment&c={$comment->comment_parent}#wpbody-content" ) ) . "\r\n";
					}

					/* translators: %s: Comment text. */
					$notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
					break;
			}

			/* translators: Comment moderation. %s: Comment action URL. */
			$notify_message .= sprintf( __( 'Approve it: %s' ), admin_url( "comment.php?action=approve&c={$comment_id}#wpbody-content" ) ) . "\r\n";

			if ( EMPTY_TRASH_DAYS ) {
				/* translators: Comment moderation. %s: Comment action URL. */
				$notify_message .= sprintf( __( 'Trash it: %s' ), admin_url( "comment.php?action=trash&c={$comment_id}#wpbody-content" ) ) . "\r\n";
			} else {
				/* translators: Comment moderation. %s: Comment action URL. */
				$notify_message .= sprintf( __( 'Delete it: %s' ), admin_url( "comment.php?action=delete&c={$comment_id}#wpbody-content" ) ) . "\r\n";
			}

			/* translators: Comment moderation. %s: Comment action URL. */
			$notify_message .= sprintf( __( 'Spam it: %s' ), admin_url( "comment.php?action=spam&c={$comment_id}#wpbody-content" ) ) . "\r\n";

			$notify_message .= sprintf(
				/* translators: Comment moderation. %s: Number of comments awaiting approval. */
				_n(
					'Currently %s comment is waiting for approval. Please visit the moderation panel:',
					'Currently %s comments are waiting for approval. Please visit the moderation panel:',
					$comments_waiting
				),
				number_format_i18n( $comments_waiting )
			) . "\r\n";
			$notify_message .= admin_url( 'edit-comments.php?comment_status=moderated#wpbody-content' ) . "\r\n";

			/* translators: Comment moderation notification email subject. 1: Site title, 2: Post title. */
			$subject = sprintf( __( '[%1$s] Please moderate: "%2$s"' ), $blogname, $post->post_title );

			/**
			 * Filters the comment moderation email text.
			 *
			 * @since 1.5.2
			 *
			 * @param string $notify_message Text of the comment moderation email.
			 * @param int    $comment_id     Comment ID.
			 */
			$notify_message = apply_filters( 'comment_moderation_text', $notify_message, $comment_id );

			/**
			 * Filters the comment moderation email subject.
			 *
			 * @since 1.5.2
			 *
			 * @param string $subject    Subject of the comment moderation email.
			 * @param int    $comment_id Comment ID.
			 */
			$subject = apply_filters( 'comment_moderation_subject', $subject, $comment_id );

			wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers );

			if ( $switched_locale ) {
				restore_previous_locale();
			}
		}

		return true;
	}
endif;

if ( ! function_exists( 'wp_password_change_notification' ) ) :
	/**
	 * Notifies the blog admin of a user changing password, normally via email.
	 *
	 * @since 2.7.0
	 *
	 * @param WP_User $user User object.
	 */
	function wp_password_change_notification( $user ) {
		/*
		 * Send a copy of password change notification to the admin,
		 * but check to see if it's the admin whose password we're changing, and skip this.
		 */
		if ( 0 !== strcasecmp( $user->user_email, get_option( 'admin_email' ) ) ) {

			$admin_user = get_user_by( 'email', get_option( 'admin_email' ) );

			if ( $admin_user ) {
				$switched_locale = switch_to_user_locale( $admin_user->ID );
			} else {
				$switched_locale = switch_to_locale( get_locale() );
			}

			/* translators: %s: User name. */
			$message = sprintf( __( 'Password changed for user: %s' ), $user->user_login ) . "\r\n";
			/*
			 * The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
			 * We want to reverse this for the plain text arena of emails.
			 */
			$blogname = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );

			$wp_password_change_notification_email = array(
				'to'      => get_option( 'admin_email' ),
				/* translators: Password change notification email subject. %s: Site title. */
				'subject' => __( '[%s] Password Changed' ),
				'message' => $message,
				'headers' => '',
			);

			/**
			 * Filters the contents of the password change notification email sent to the site admin.
			 *
			 * @since 4.9.0
			 *
			 * @param array   $wp_password_change_notification_email {
			 *     Used to build wp_mail().
			 *
			 *     @type string $to      The intended recipient - site admin email address.
			 *     @type string $subject The subject of the email.
			 *     @type string $message The body of the email.
			 *     @type string $headers The headers of the email.
			 * }
			 * @param WP_User $user     User object for user whose password was changed.
			 * @param string  $blogname The site title.
			 */
			$wp_password_change_notification_email = apply_filters( 'wp_password_change_notification_email', $wp_password_change_notification_email, $user, $blogname );

			wp_mail(
				$wp_password_change_notification_email['to'],
				wp_specialchars_decode( sprintf( $wp_password_change_notification_email['subject'], $blogname ) ),
				$wp_password_change_notification_email['message'],
				$wp_password_change_notification_email['headers']
			);

			if ( $switched_locale ) {
				restore_previous_locale();
			}
		}
	}
endif;

if ( ! function_exists( 'wp_new_user_notification' ) ) :
	/**
	 * Emails login credentials to a newly-registered user.
	 *
	 * A new user registration notification is also sent to admin email.
	 *
	 * @since 2.0.0
	 * @since 4.3.0 The `$plaintext_pass` parameter was changed to `$notify`.
	 * @since 4.3.1 The `$plaintext_pass` parameter was deprecated. `$notify` added as a third parameter.
	 * @since 4.6.0 The `$notify` parameter accepts 'user' for sending notification only to the user created.
	 *
	 * @param int    $user_id    User ID.
	 * @param null   $deprecated Not used (argument deprecated).
	 * @param string $notify     Optional. Type of notification that should happen. Accepts 'admin' or an empty
	 *                           string (admin only), 'user', or 'both' (admin and user). Default empty.
	 */
	function wp_new_user_notification( $user_id, $deprecated = null, $notify = '' ) {
		if ( null !== $deprecated ) {
			_deprecated_argument( __FUNCTION__, '4.3.1' );
		}

		// Accepts only 'user', 'admin' , 'both' or default '' as $notify.
		if ( ! in_array( $notify, array( 'user', 'admin', 'both', '' ), true ) ) {
			return;
		}

		$user = get_userdata( $user_id );

		/*
		 * The blogname option is escaped with esc_html() on the way into the database in sanitize_option().
		 * We want to reverse this for the plain text arena of emails.
		 */
		$blogname = wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES );

		/**
		 * Filters whether the admin is notified of a new user registration.
		 *
		 * @since 6.1.0
		 *
		 * @param bool    $send Whether to send the email. Default true.
		 * @param WP_User $user User object for new user.
		 */
		$send_notification_to_admin = apply_filters( 'wp_send_new_user_notification_to_admin', true, $user );

		if ( 'user' !== $notify && true === $send_notification_to_admin ) {

			$admin_user = get_user_by( 'email', get_option( 'admin_email' ) );

			if ( $admin_user ) {
				$switched_locale = switch_to_user_locale( $admin_user->ID );
			} else {
				$switched_locale = switch_to_locale( get_locale() );
			}

			/* translators: %s: Site title. */
			$message = sprintf( __( 'New user registration on your site %s:' ), $blogname ) . "\r\n\r\n";
			/* translators: %s: User login. */
			$message .= sprintf( __( 'Username: %s' ), $user->user_login ) . "\r\n\r\n";
			/* translators: %s: User email address. */
			$message .= sprintf( __( 'Email: %s' ), $user->user_email ) . "\r\n";

			$wp_new_user_notification_email_admin = array(
				'to'      => get_option( 'admin_email' ),
				/* translators: New user registration notification email subject. %s: Site title. */
				'subject' => __( '[%s] New User Registration' ),
				'message' => $message,
				'headers' => '',
			);

			/**
			 * Filters the contents of the new user notification email sent to the site admin.
			 *
			 * @since 4.9.0
			 *
			 * @param array   $wp_new_user_notification_email_admin {
			 *     Used to build wp_mail().
			 *
			 *     @type string $to      The intended recipient - site admin email address.
			 *     @type string $subject The subject of the email.
			 *     @type string $message The body of the email.
			 *     @type string $headers The headers of the email.
			 * }
			 * @param WP_User $user     User object for new user.
			 * @param string  $blogname The site title.
			 */
			$wp_new_user_notification_email_admin = apply_filters( 'wp_new_user_notification_email_admin', $wp_new_user_notification_email_admin, $user, $blogname );

			wp_mail(
				$wp_new_user_notification_email_admin['to'],
				wp_specialchars_decode( sprintf( $wp_new_user_notification_email_admin['subject'], $blogname ) ),
				$wp_new_user_notification_email_admin['message'],
				$wp_new_user_notification_email_admin['headers']
			);

			if ( $switched_locale ) {
				restore_previous_locale();
			}
		}

		/**
		 * Filters whether the user is notified of their new user registration.
		 *
		 * @since 6.1.0
		 *
		 * @param bool    $send Whether to send the email. Default true.
		 * @param WP_User $user User object for new user.
		 */
		$send_notification_to_user = apply_filters( 'wp_send_new_user_notification_to_user', true, $user );

		// `$deprecated` was pre-4.3 `$plaintext_pass`. An empty `$plaintext_pass` didn't sent a user notification.
		if ( 'admin' === $notify || true !== $send_notification_to_user || ( empty( $deprecated ) && empty( $notify ) ) ) {
			return;
		}

		$key = get_password_reset_key( $user );
		if ( is_wp_error( $key ) ) {
			return;
		}

		$switched_locale = switch_to_user_locale( $user_id );

		/* translators: %s: User login. */
		$message  = sprintf( __( 'Username: %s' ), $user->user_login ) . "\r\n\r\n";
		$message .= __( 'To set your password, visit the following address:' ) . "\r\n\r\n";

		/*
		 * Since some user login names end in a period, this could produce ambiguous URLs that
		 * end in a period. To avoid the ambiguity, ensure that the login is not the last query
		 * arg in the URL. If moving it to the end, a trailing period will need to be escaped.
		 *
		 * @see https://core.trac.wordpress.org/tickets/42957
		 */
		$message .= network_site_url( 'wp-login.php?login=' . rawurlencode( $user->user_login ) . "&key=$key&action=rp", 'login' ) . "\r\n\r\n";

		$message .= wp_login_url() . "\r\n";

		$wp_new_user_notification_email = array(
			'to'      => $user->user_email,
			/* translators: Login details notification email subject. %s: Site title. */
			'subject' => __( '[%s] Login Details' ),
			'message' => $message,
			'headers' => '',
		);

		/**
		 * Filters the contents of the new user notification email sent to the new user.
		 *
		 * @since 4.9.0
		 *
		 * @param array   $wp_new_user_notification_email {
		 *     Used to build wp_mail().
		 *
		 *     @type string $to      The intended recipient - New user email address.
		 *     @type string $subject The subject of the email.
		 *     @type string $message The body of the email.
		 *     @type string $headers The headers of the email.
		 * }
		 * @param WP_User $user     User object for new user.
		 * @param string  $blogname The site title.
		 */
		$wp_new_user_notification_email = apply_filters( 'wp_new_user_notification_email', $wp_new_user_notification_email, $user, $blogname );

		wp_mail(
			$wp_new_user_notification_email['to'],
			wp_specialchars_decode( sprintf( $wp_new_user_notification_email['subject'], $blogname ) ),
			$wp_new_user_notification_email['message'],
			$wp_new_user_notification_email['headers']
		);

		if ( $switched_locale ) {
			restore_previous_locale();
		}
	}
endif;

if ( ! function_exists( 'wp_nonce_tick' ) ) :
	/**
	 * Returns the time-dependent variable for nonce creation.
	 *
	 * A nonce has a lifespan of two ticks. Nonces in their second tick may be
	 * updated, e.g. by autosave.
	 *
	 * @since 2.5.0
	 * @since 6.1.0 Added `$action` argument.
	 *
	 * @param string|int $action Optional. The nonce action. Default -1.
	 * @return float Float value rounded up to the next highest integer.
	 */
	function wp_nonce_tick( $action = -1 ) {
		/**
		 * Filters the lifespan of nonces in seconds.
		 *
		 * @since 2.5.0
		 * @since 6.1.0 Added `$action` argument to allow for more targeted filters.
		 *
		 * @param int        $lifespan Lifespan of nonces in seconds. Default 86,400 seconds, or one day.
		 * @param string|int $action   The nonce action, or -1 if none was provided.
		 */
		$nonce_life = apply_filters( 'nonce_life', DAY_IN_SECONDS, $action );

		return ceil( time() / ( $nonce_life / 2 ) );
	}
endif;

if ( ! function_exists( 'wp_verify_nonce' ) ) :
	/**
	 * Verifies that a correct security nonce was used with time limit.
	 *
	 * A nonce is valid for between 12 and 24 hours (by default).
	 *
	 * @since 2.0.3
	 *
	 * @param string     $nonce  Nonce value that was used for verification, usually via a form field.
	 * @param string|int $action Should give context to what is taking place and be the same when nonce was created.
	 * @return int|false 1 if the nonce is valid and generated between 0-12 hours ago,
	 *                   2 if the nonce is valid and generated between 12-24 hours ago.
	 *                   False if the nonce is invalid.
	 */
	function wp_verify_nonce( $nonce, $action = -1 ) {
		$nonce = (string) $nonce;
		$user  = wp_get_current_user();
		$uid   = (int) $user->ID;
		if ( ! $uid ) {
			/**
			 * Filters whether the user who generated the nonce is logged out.
			 *
			 * @since 3.5.0
			 *
			 * @param int        $uid    ID of the nonce-owning user.
			 * @param string|int $action The nonce action, or -1 if none was provided.
			 */
			$uid = apply_filters( 'nonce_user_logged_out', $uid, $action );
		}

		if ( empty( $nonce ) ) {
			return false;
		}

		$token = wp_get_session_token();
		$i     = wp_nonce_tick( $action );

		// Nonce generated 0-12 hours ago.
		$expected = substr( wp_hash( $i . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
		if ( hash_equals( $expected, $nonce ) ) {
			return 1;
		}

		// Nonce generated 12-24 hours ago.
		$expected = substr( wp_hash( ( $i - 1 ) . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
		if ( hash_equals( $expected, $nonce ) ) {
			return 2;
		}

		/**
		 * Fires when nonce verification fails.
		 *
		 * @since 4.4.0
		 *
		 * @param string     $nonce  The invalid nonce.
		 * @param string|int $action The nonce action.
		 * @param WP_User    $user   The current user object.
		 * @param string     $token  The user's session token.
		 */
		do_action( 'wp_verify_nonce_failed', $nonce, $action, $user, $token );

		// Invalid nonce.
		return false;
	}
endif;

if ( ! function_exists( 'wp_create_nonce' ) ) :
	/**
	 * Creates a cryptographic token tied to a specific action, user, user session,
	 * and window of time.
	 *
	 * @since 2.0.3
	 * @since 4.0.0 Session tokens were integrated with nonce creation.
	 *
	 * @param string|int $action Scalar value to add context to the nonce.
	 * @return string The token.
	 */
	function wp_create_nonce( $action = -1 ) {
		$user = wp_get_current_user();
		$uid  = (int) $user->ID;
		if ( ! $uid ) {
			/** This filter is documented in wp-includes/pluggable.php */
			$uid = apply_filters( 'nonce_user_logged_out', $uid, $action );
		}

		$token = wp_get_session_token();
		$i     = wp_nonce_tick( $action );

		return substr( wp_hash( $i . '|' . $action . '|' . $uid . '|' . $token, 'nonce' ), -12, 10 );
	}
endif;

if ( ! function_exists( 'wp_salt' ) ) :
	/**
	 * Returns a salt to add to hashes.
	 *
	 * Salts are created using secret keys. Secret keys are located in two places:
	 * in the database and in the wp-config.php file. The secret key in the database
	 * is randomly generated and will be appended to the secret keys in wp-config.php.
	 *
	 * The secret keys in wp-config.php should be updated to strong, random keys to maximize
	 * security. Below is an example of how the secret key constants are defined.
	 * Do not paste this example directly into wp-config.php. Instead, have a
	 * {@link https://api.wordpress.org/secret-key/1.1/salt/ secret key created} just
	 * for you.
	 *
	 *     define('AUTH_KEY',         ' Xakm<o xQy rw4EMsLKM-?!T+,PFF})H4lzcW57AF0U@N@< >M%G4Yt>f`z]MON');
	 *     define('SECURE_AUTH_KEY',  'LzJ}op]mr|6+![P}Ak:uNdJCJZd>(Hx.-Mh#Tz)pCIU#uGEnfFz|f ;;eU%/U^O~');
	 *     define('LOGGED_IN_KEY',    '|i|Ux`9<p-h$aFf(qnT:sDO:D1P^wZ$$/Ra@miTJi9G;ddp_<q}6H1)o|a +&JCM');
	 *     define('NONCE_KEY',        '%:R{[P|,s.KuMltH5}cI;/k<Gx~j!f0I)m_sIyu+&NJZ)-iO>z7X>QYR0Z_XnZ@|');
	 *     define('AUTH_SALT',        'eZyT)-Naw]F8CwA*VaW#q*|.)g@o}||wf~@C-YSt}(dh_r6EbI#A,y|nU2{B#JBW');
	 *     define('SECURE_AUTH_SALT', '!=oLUTXh,QW=H `}`L|9/^4-3 STz},T(w}W<I`.JjPi)<Bmf1v,HpGe}T1:Xt7n');
	 *     define('LOGGED_IN_SALT',   '+XSqHc;@Q*K_b|Z?NC[3H!!EONbh.n<+=uKR:>*c(u`g~EJBf#8u#R{mUEZrozmm');
	 *     define('NONCE_SALT',       'h`GXHhD>SLWVfg1(1(N{;.V!MoE(SfbA_ksP@&`+AycHcAV$+?@3q+rxV{%^VyKT');
	 *
	 * Salting passwords helps against tools which has stored hashed values of
	 * common dictionary strings. The added values makes it harder to crack.
	 *
	 * @since 2.5.0
	 *
	 * @link https://api.wordpress.org/secret-key/1.1/salt/ Create secrets for wp-config.php
	 *
	 * @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce).
	 * @return string Salt value
	 */
	function wp_salt( $scheme = 'auth' ) {
		static $cached_salts = array();
		if ( isset( $cached_salts[ $scheme ] ) ) {
			/**
			 * Filters the WordPress salt.
			 *
			 * @since 2.5.0
			 *
			 * @param string $cached_salt Cached salt for the given scheme.
			 * @param string $scheme      Authentication scheme. Values include 'auth',
			 *                            'secure_auth', 'logged_in', and 'nonce'.
			 */
			return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
		}

		static $duplicated_keys;
		if ( null === $duplicated_keys ) {
			$duplicated_keys = array();

			foreach ( array( 'AUTH', 'SECURE_AUTH', 'LOGGED_IN', 'NONCE', 'SECRET' ) as $first ) {
				foreach ( array( 'KEY', 'SALT' ) as $second ) {
					if ( ! defined( "{$first}_{$second}" ) ) {
						continue;
					}
					$value                     = constant( "{$first}_{$second}" );
					$duplicated_keys[ $value ] = isset( $duplicated_keys[ $value ] );
				}
			}

			$duplicated_keys['put your unique phrase here'] = true;

			/*
			 * translators: This string should only be translated if wp-config-sample.php is localized.
			 * You can check the localized release package or
			 * https://i18n.svn.wordpress.org/<locale code>/branches/<wp version>/dist/wp-config-sample.php
			 */
			$duplicated_keys[ __( 'put your unique phrase here' ) ] = true;
		}

		/*
		 * Determine which options to prime.
		 *
		 * If the salt keys are undefined, use a duplicate value or the
		 * default `put your unique phrase here` value the salt will be
		 * generated via `wp_generate_password()` and stored as a site
		 * option. These options will be primed to avoid repeated
		 * database requests for undefined salts.
		 */
		$options_to_prime = array();
		foreach ( array( 'auth', 'secure_auth', 'logged_in', 'nonce' ) as $key ) {
			foreach ( array( 'key', 'salt' ) as $second ) {
				$const = strtoupper( "{$key}_{$second}" );
				if ( ! defined( $const ) || true === $duplicated_keys[ constant( $const ) ] ) {
					$options_to_prime[] = "{$key}_{$second}";
				}
			}
		}

		if ( ! empty( $options_to_prime ) ) {
			/*
			 * Also prime `secret_key` used for undefined salting schemes.
			 *
			 * If the scheme is unknown, the default value for `secret_key` will be
			 * used too for the salt. This should rarely happen, so the option is only
			 * primed if other salts are undefined.
			 *
			 * At this point of execution it is known that a database call will be made
			 * to prime salts, so the `secret_key` option can be primed regardless of the
			 * constants status.
			 */
			$options_to_prime[] = 'secret_key';
			wp_prime_site_option_caches( $options_to_prime );
		}

		$values = array(
			'key'  => '',
			'salt' => '',
		);
		if ( defined( 'SECRET_KEY' ) && SECRET_KEY && empty( $duplicated_keys[ SECRET_KEY ] ) ) {
			$values['key'] = SECRET_KEY;
		}
		if ( 'auth' === $scheme && defined( 'SECRET_SALT' ) && SECRET_SALT && empty( $duplicated_keys[ SECRET_SALT ] ) ) {
			$values['salt'] = SECRET_SALT;
		}

		if ( in_array( $scheme, array( 'auth', 'secure_auth', 'logged_in', 'nonce' ), true ) ) {
			foreach ( array( 'key', 'salt' ) as $type ) {
				$const = strtoupper( "{$scheme}_{$type}" );
				if ( defined( $const ) && constant( $const ) && empty( $duplicated_keys[ constant( $const ) ] ) ) {
					$values[ $type ] = constant( $const );
				} elseif ( ! $values[ $type ] ) {
					$values[ $type ] = get_site_option( "{$scheme}_{$type}" );
					if ( ! $values[ $type ] ) {
						$values[ $type ] = wp_generate_password( 64, true, true );
						update_site_option( "{$scheme}_{$type}", $values[ $type ] );
					}
				}
			}
		} else {
			if ( ! $values['key'] ) {
				$values['key'] = get_site_option( 'secret_key' );
				if ( ! $values['key'] ) {
					$values['key'] = wp_generate_password( 64, true, true );
					update_site_option( 'secret_key', $values['key'] );
				}
			}
			$values['salt'] = hash_hmac( 'md5', $scheme, $values['key'] );
		}

		$cached_salts[ $scheme ] = $values['key'] . $values['salt'];

		/** This filter is documented in wp-includes/pluggable.php */
		return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme );
	}
endif;

if ( ! function_exists( 'wp_hash' ) ) :
	/**
	 * Gets the hash of the given string.
	 *
	 * The default algorithm is md5 but can be changed to any algorithm supported by
	 * `hash_hmac()`. Use the `hash_hmac_algos()` function to check the supported
	 * algorithms.
	 *
	 * @since 2.0.3
	 * @since 6.8.0 The `$algo` parameter was added.
	 *
	 * @throws InvalidArgumentException if the hashing algorithm is not supported.
	 *
	 * @param string $data   Plain text to hash.
	 * @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce).
	 * @param string $algo   Hashing algorithm to use. Default: 'md5'.
	 * @return string Hash of $data.
	 */
	function wp_hash( $data, $scheme = 'auth', $algo = 'md5' ) {
		$salt = wp_salt( $scheme );

		// Ensure the algorithm is supported by the hash_hmac function.
		if ( ! in_array( $algo, hash_hmac_algos(), true ) ) {
			throw new InvalidArgumentException(
				sprintf(
					/* translators: 1: Name of a cryptographic hash algorithm. 2: List of supported algorithms. */
					__( 'Unsupported hashing algorithm: %1$s. Supported algorithms are: %2$s' ),
					$algo,
					implode( ', ', hash_hmac_algos() )
				)
			);
		}

		return hash_hmac( $algo, $data, $salt );
	}
endif;

if ( ! function_exists( 'wp_hash_password' ) ) :
	/**
	 * Creates a hash of a plain text password.
	 *
	 * For integration with other applications, this function can be overwritten to
	 * instead use the other package password hashing algorithm.
	 *
	 * @since 2.5.0
	 * @since 6.8.0 The password is now hashed using bcrypt by default instead of phpass.
	 *
	 * @global PasswordHash $wp_hasher phpass object.
	 *
	 * @param string $password Plain text user password to hash.
	 * @return string The hash string of the password.
	 */
	function wp_hash_password(
		#[\SensitiveParameter]
		$password
	) {
		global $wp_hasher;

		if ( ! empty( $wp_hasher ) ) {
			return $wp_hasher->HashPassword( trim( $password ) );
		}

		if ( strlen( $password ) > 4096 ) {
			return '*';
		}

		/**
		 * Filters the hashing algorithm to use in the password_hash() and password_needs_rehash() functions.
		 *
		 * The default is the value of the `PASSWORD_BCRYPT` constant which means bcrypt is used.
		 *
		 * **Important:** The only password hashing algorithm that is guaranteed to be available across PHP
		 * installations is bcrypt. If you use any other algorithm you must make sure that it is available on
		 * the server. The `password_algos()` function can be used to check which hashing algorithms are available.
		 *
		 * The hashing options can be controlled via the {@see 'wp_hash_password_options'} filter.
		 *
		 * Other available constants include:
		 *
		 * - `PASSWORD_ARGON2I`
		 * - `PASSWORD_ARGON2ID`
		 * - `PASSWORD_DEFAULT`
		 *
		 * The values of the algorithm constants are strings in PHP 7.4+ and integers in PHP 7.3 and earlier.
		 *
		 * @since 6.8.0
		 *
		 * @param string|int $algorithm The hashing algorithm. Default is the value of the `PASSWORD_BCRYPT` constant.
		 */
		$algorithm = apply_filters( 'wp_hash_password_algorithm', PASSWORD_BCRYPT );

		/**
		 * Filters the options passed to the password_hash() and password_needs_rehash() functions.
		 *
		 * The default hashing algorithm is bcrypt, but this can be changed via the {@see 'wp_hash_password_algorithm'}
		 * filter. You must ensure that the options are appropriate for the algorithm in use.
		 *
		 * The values of the algorithm constants are strings in PHP 7.4+ and integers in PHP 7.3 and earlier.
		 *
		 * @since 6.8.0
		 *
		 * @param array      $options   Array of options to pass to the password hashing functions.
		 *                              By default this is an empty array which means the default
		 *                              options will be used.
		 * @param string|int $algorithm The hashing algorithm in use.
		 */
		$options = apply_filters( 'wp_hash_password_options', array(), $algorithm );

		// Algorithms other than bcrypt don't need to use pre-hashing.
		if ( PASSWORD_BCRYPT !== $algorithm ) {
			return password_hash( $password, $algorithm, $options );
		}

		// Use SHA-384 to retain entropy from a password that's longer than 72 bytes, and a `wp-sha384` key for domain separation.
		$password_to_hash = base64_encode( hash_hmac( 'sha384', trim( $password ), 'wp-sha384', true ) );

		// Add a prefix to facilitate distinguishing vanilla bcrypt hashes.
		return '$wp' . password_hash( $password_to_hash, $algorithm, $options );
	}
endif;

if ( ! function_exists( 'wp_check_password' ) ) :
	/**
	 * Checks a plaintext password against a hashed password.
	 *
	 * Note that this function may be used to check a value that is not a user password.
	 * A plugin may use this function to check a password of a different type, and there
	 * may not always be a user ID associated with the password.
	 *
	 * For integration with other applications, this function can be overwritten to
	 * instead use the other package password hashing algorithm.
	 *
	 * @since 2.5.0
	 * @since 6.8.0 Passwords in WordPress are now hashed with bcrypt by default. A
	 *              password that wasn't hashed with bcrypt will be checked with phpass.
	 *
	 * @global PasswordHash $wp_hasher phpass object. Used as a fallback for verifying
	 *                                 passwords that were hashed with phpass.
	 *
	 * @param string     $password Plaintext password.
	 * @param string     $hash     Hash of the password to check against.
	 * @param string|int $user_id  Optional. ID of a user associated with the password.
	 * @return bool False, if the $password does not match the hashed password.
	 */
	function wp_check_password(
		#[\SensitiveParameter]
		$password,
		$hash,
		$user_id = ''
	) {
		global $wp_hasher;

		if ( strlen( $hash ) <= 32 ) {
			// Check the hash using md5 regardless of the current hashing mechanism.
			$check = hash_equals( $hash, md5( $password ) );
		} elseif ( ! empty( $wp_hasher ) ) {
			// Check the password using the overridden hasher.
			$check = $wp_hasher->CheckPassword( $password, $hash );
		} elseif ( strlen( $password ) > 4096 ) {
			// Passwords longer than 4096 characters are not supported.
			$check = false;
		} elseif ( str_starts_with( $hash, '$wp' ) ) {
			// Check the password using the current prefixed hash.
			$password_to_verify = base64_encode( hash_hmac( 'sha384', $password, 'wp-sha384', true ) );
			$check              = password_verify( $password_to_verify, substr( $hash, 3 ) );
		} elseif ( str_starts_with( $hash, '$P$' ) ) {
			// Check the password using phpass.
			require_once ABSPATH . WPINC . '/class-phpass.php';
			$check = ( new PasswordHash( 8, true ) )->CheckPassword( $password, $hash );
		} else {
			// Check the password using compat support for any non-prefixed hash.
			$check = password_verify( $password, $hash );
		}

		/**
		 * Filters whether the plaintext password matches the hashed password.
		 *
		 * @since 2.5.0
		 * @since 6.8.0 Passwords are now hashed with bcrypt by default.
		 *              Old passwords may still be hashed with phpass or md5.
		 *
		 * @param bool       $check    Whether the passwords match.
		 * @param string     $password The plaintext password.
		 * @param string     $hash     The hashed password.
		 * @param string|int $user_id  Optional ID of a user associated with the password.
		 *                             Can be empty.
		 */
		return apply_filters( 'check_password', $check, $password, $hash, $user_id );
	}
endif;

if ( ! function_exists( 'wp_password_needs_rehash' ) ) :
	/**
	 * Checks whether a password hash needs to be rehashed.
	 *
	 * Passwords are hashed with bcrypt using the default cost. A password hashed in a prior version
	 * of WordPress may still be hashed with phpass and will need to be rehashed. If the default cost
	 * or algorithm is changed in PHP or WordPress then a password hashed in a previous version will
	 * need to be rehashed.
	 *
	 * Note that, just like wp_check_password(), this function may be used to check a value that is
	 * not a user password. A plugin may use this function to check a password of a different type,
	 * and there may not always be a user ID associated with the password.
	 *
	 * @since 6.8.0
	 *
	 * @global PasswordHash $wp_hasher phpass object.
	 *
	 * @param string     $hash    Hash of a password to check.
	 * @param string|int $user_id Optional. ID of a user associated with the password.
	 * @return bool Whether the hash needs to be rehashed.
	 */
	function wp_password_needs_rehash( $hash, $user_id = '' ) {
		global $wp_hasher;

		if ( ! empty( $wp_hasher ) ) {
			return false;
		}

		/** This filter is documented in wp-includes/pluggable.php */
		$algorithm = apply_filters( 'wp_hash_password_algorithm', PASSWORD_BCRYPT );

		/** This filter is documented in wp-includes/pluggable.php */
		$options = apply_filters( 'wp_hash_password_options', array(), $algorithm );

		$prefixed = str_starts_with( $hash, '$wp' );

		if ( ( PASSWORD_BCRYPT === $algorithm ) && ! $prefixed ) {
			// If bcrypt is in use and the hash is not prefixed then it needs to be rehashed.
			$needs_rehash = true;
		} else {
			// Otherwise check the hash minus its prefix if necessary.
			$hash_to_check = $prefixed ? substr( $hash, 3 ) : $hash;
			$needs_rehash  = password_needs_rehash( $hash_to_check, $algorithm, $options );
		}

		/**
		 * Filters whether the password hash needs to be rehashed.
		 *
		 * @since 6.8.0
		 *
		 * @param bool       $needs_rehash Whether the password hash needs to be rehashed.
		 * @param string     $hash         The password hash.
		 * @param string|int $user_id      Optional. ID of a user associated with the password.
		 */
		return apply_filters( 'password_needs_rehash', $needs_rehash, $hash, $user_id );
	}
endif;

if ( ! function_exists( 'wp_generate_password' ) ) :
	/**
	 * Generates a random password drawn from the defined set of characters.
	 *
	 * Uses wp_rand() to create passwords with far less predictability
	 * than similar native PHP functions like `rand()` or `mt_rand()`.
	 *
	 * @since 2.5.0
	 *
	 * @param int  $length              Optional. The length of password to generate. Default 12.
	 * @param bool $special_chars       Optional. Whether to include standard special characters.
	 *                                  Default true.
	 * @param bool $extra_special_chars Optional. Whether to include other special characters.
	 *                                  Used when generating secret keys and salts. Default false.
	 * @return string The random password.
	 */
	function wp_generate_password( $length = 12, $special_chars = true, $extra_special_chars = false ) {
		$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
		if ( $special_chars ) {
			$chars .= '!@#$%^&*()';
		}
		if ( $extra_special_chars ) {
			$chars .= '-_ []{}<>~`+=,.;:/?|';
		}

		$password = '';
		for ( $i = 0; $i < $length; $i++ ) {
			$password .= substr( $chars, wp_rand( 0, strlen( $chars ) - 1 ), 1 );
		}

		/**
		 * Filters the randomly-generated password.
		 *
		 * @since 3.0.0
		 * @since 5.3.0 Added the `$length`, `$special_chars`, and `$extra_special_chars` parameters.
		 *
		 * @param string $password            The generated password.
		 * @param int    $length              The length of password to generate.
		 * @param bool   $special_chars       Whether to include standard special characters.
		 * @param bool   $extra_special_chars Whether to include other special characters.
		 */
		return apply_filters( 'random_password', $password, $length, $special_chars, $extra_special_chars );
	}
endif;

if ( ! function_exists( 'wp_rand' ) ) :
	/**
	 * Generates a random non-negative number.
	 *
	 * @since 2.6.2
	 * @since 4.4.0 Uses PHP7 random_int() or the random_compat library if available.
	 * @since 6.1.0 Returns zero instead of a random number if both `$min` and `$max` are zero.
	 *
	 * @global string $rnd_value
	 *
	 * @param int $min Optional. Lower limit for the generated number.
	 *                 Accepts positive integers or zero. Defaults to 0.
	 * @param int $max Optional. Upper limit for the generated number.
	 *                 Accepts positive integers. Defaults to 4294967295.
	 * @return int A random non-negative number between min and max.
	 */
	function wp_rand( $min = null, $max = null ) {
		global $rnd_value;

		/*
		 * Some misconfigured 32-bit environments (Entropy PHP, for example)
		 * truncate integers larger than PHP_INT_MAX to PHP_INT_MAX rather than overflowing them to floats.
		 */
		$max_random_number = 3000000000 === 2147483647 ? (float) '4294967295' : 4294967295; // 4294967295 = 0xffffffff

		if ( null === $min ) {
			$min = 0;
		}

		if ( null === $max ) {
			$max = $max_random_number;
		}

		// We only handle ints, floats are truncated to their integer value.
		$min = (int) $min;
		$max = (int) $max;

		// Use PHP's CSPRNG, or a compatible method.
		static $use_random_int_functionality = true;
		if ( $use_random_int_functionality ) {
			try {
				// wp_rand() can accept arguments in either order, PHP cannot.
				$_max = max( $min, $max );
				$_min = min( $min, $max );
				$val  = random_int( $_min, $_max );
				if ( false !== $val ) {
					return absint( $val );
				} else {
					$use_random_int_functionality = false;
				}
			} catch ( Error $e ) {
				$use_random_int_functionality = false;
			} catch ( Exception $e ) {
				$use_random_int_functionality = false;
			}
		}

		/*
		 * Reset $rnd_value after 14 uses.
		 * 32 (md5) + 40 (sha1) + 40 (sha1) / 8 = 14 random numbers from $rnd_value.
		 */
		if ( strlen( $rnd_value ) < 8 ) {
			if ( defined( 'WP_SETUP_CONFIG' ) ) {
				static $seed = '';
			} else {
				$seed = get_transient( 'random_seed' );
			}
			$rnd_value  = md5( uniqid( microtime() . mt_rand(), true ) . $seed );
			$rnd_value .= sha1( $rnd_value );
			$rnd_value .= sha1( $rnd_value . $seed );
			$seed       = md5( $seed . $rnd_value );
			if ( ! defined( 'WP_SETUP_CONFIG' ) && ! defined( 'WP_INSTALLING' ) ) {
				set_transient( 'random_seed', $seed );
			}
		}

		// Take the first 8 digits for our value.
		$value = substr( $rnd_value, 0, 8 );

		// Strip the first eight, leaving the remainder for the next call to wp_rand().
		$rnd_value = substr( $rnd_value, 8 );

		$value = abs( hexdec( $value ) );

		// Reduce the value to be within the min - max range.
		$value = $min + ( $max - $min + 1 ) * $value / ( $max_random_number + 1 );

		return abs( (int) $value );
	}
endif;

if ( ! function_exists( 'wp_set_password' ) ) :
	/**
	 * Updates the user's password with a new hashed one.
	 *
	 * For integration with other applications, this function can be overwritten to
	 * instead use the other package password checking algorithm.
	 *
	 * Please note: This function should be used sparingly and is really only meant for single-time
	 * application. Leveraging this improperly in a plugin or theme could result in an endless loop
	 * of password resets if precautions are not taken to ensure it does not execute on every page load.
	 *
	 * @since 2.5.0
	 * @since 6.8.0 The password is now hashed using bcrypt by default instead of phpass.
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * @param string $password The plaintext new user password.
	 * @param int    $user_id  User ID.
	 */
	function wp_set_password(
		#[\SensitiveParameter]
		$password,
		$user_id
	) {
		global $wpdb;

		$old_user_data = get_userdata( $user_id );

		$hash = wp_hash_password( $password );
		$wpdb->update(
			$wpdb->users,
			array(
				'user_pass'           => $hash,
				'user_activation_key' => '',
			),
			array( 'ID' => $user_id )
		);

		clean_user_cache( $user_id );

		/**
		 * Fires after the user password is set.
		 *
		 * @since 6.2.0
		 * @since 6.7.0 The `$old_user_data` parameter was added.
		 *
		 * @param string  $password      The plaintext password just set.
		 * @param int     $user_id       The ID of the user whose password was just set.
		 * @param WP_User $old_user_data Object containing user's data prior to update.
		 */
		do_action( 'wp_set_password', $password, $user_id, $old_user_data );
	}
endif;

if ( ! function_exists( 'get_avatar' ) ) :
	/**
	 * Retrieves the avatar `<img>` tag for a user, email address, MD5 hash, comment, or post.
	 *
	 * @since 2.5.0
	 * @since 4.2.0 Added the optional `$args` parameter.
	 * @since 5.5.0 Added the `loading` argument.
	 * @since 6.1.0 Added the `decoding` argument.
	 * @since 6.3.0 Added the `fetchpriority` argument.
	 *
	 * @param mixed  $id_or_email   The avatar to retrieve. Accepts a user ID, Gravatar MD5 hash,
	 *                              user email, WP_User object, WP_Post object, or WP_Comment object.
	 * @param int    $size          Optional. Height and width of the avatar in pixels. Default 96.
	 * @param string $default_value URL for the default image or a default type. Accepts:
	 *                              - '404' (return a 404 instead of a default image)
	 *                              - 'retro' (a 8-bit arcade-style pixelated face)
	 *                              - 'robohash' (a robot)
	 *                              - 'monsterid' (a monster)
	 *                              - 'wavatar' (a cartoon face)
	 *                              - 'identicon' (the "quilt", a geometric pattern)
	 *                              - 'initials' (initials based avatar with background color)
	 *                              - 'color' (generated background color)
	 *                              - 'mystery', 'mm', or 'mysteryman' (The Oyster Man)
	 *                              - 'blank' (transparent GIF)
	 *                              - 'gravatar_default' (the Gravatar logo)
	 *                              Default is the value of the 'avatar_default' option,
	 *                              with a fallback of 'mystery'.
	 * @param string $alt           Optional. Alternative text to use in the avatar image tag.
	 *                              Default empty.
	 * @param array  $args {
	 *     Optional. Extra arguments to retrieve the avatar.
	 *
	 *     @type int          $height        Display height of the avatar in pixels. Defaults to $size.
	 *     @type int          $width         Display width of the avatar in pixels. Defaults to $size.
	 *     @type bool         $force_default Whether to always show the default image, never the Gravatar.
	 *                                       Default false.
	 *     @type string       $rating        What rating to display avatars up to. Accepts:
	 *                                       - 'G' (suitable for all audiences)
	 *                                       - 'PG' (possibly offensive, usually for audiences 13 and above)
	 *                                       - 'R' (intended for adult audiences above 17)
	 *                                       - 'X' (even more mature than above)
	 *                                       Default is the value of the 'avatar_rating' option.
	 *     @type string       $scheme        URL scheme to use. See set_url_scheme() for accepted values.
	 *                                       Default null.
	 *     @type array|string $class         Array or string of additional classes to add to the img element.
	 *                                       Default null.
	 *     @type bool         $force_display Whether to always show the avatar - ignores the show_avatars option.
	 *                                       Default false.
	 *     @type string       $loading       Value for the `loading` attribute.
	 *                                       Default null.
	 *     @type string       $fetchpriority Value for the `fetchpriority` attribute.
	 *                                       Default null.
	 *     @type string       $decoding      Value for the `decoding` attribute.
	 *                                       Default null.
	 *     @type string       $extra_attr    HTML attributes to insert in the IMG element. Is not sanitized.
	 *                                       Default empty.
	 * }
	 * @return string|false `<img>` tag for the user's avatar. False on failure.
	 */
	function get_avatar( $id_or_email, $size = 96, $default_value = '', $alt = '', $args = null ) {
		$defaults = array(
			// get_avatar_data() args.
			'size'          => 96,
			'height'        => null,
			'width'         => null,
			'default'       => get_option( 'avatar_default', 'mystery' ),
			'force_default' => false,
			'rating'        => get_option( 'avatar_rating' ),
			'scheme'        => null,
			'alt'           => '',
			'class'         => null,
			'force_display' => false,
			'loading'       => null,
			'fetchpriority' => null,
			'decoding'      => null,
			'extra_attr'    => '',
		);

		if ( empty( $args ) ) {
			$args = array();
		}

		$args['size']    = (int) $size;
		$args['default'] = $default_value;
		$args['alt']     = $alt;

		$args = wp_parse_args( $args, $defaults );

		if ( empty( $args['height'] ) ) {
			$args['height'] = $args['size'];
		}
		if ( empty( $args['width'] ) ) {
			$args['width'] = $args['size'];
		}

		// Update args with loading optimized attributes.
		$loading_optimization_attr = wp_get_loading_optimization_attributes( 'img', $args, 'get_avatar' );

		$args = array_merge( $args, $loading_optimization_attr );

		if ( is_object( $id_or_email ) && isset( $id_or_email->comment_ID ) ) {
			$id_or_email = get_comment( $id_or_email );
		}

		/**
		 * Allows the HTML for a user's avatar to be returned early.
		 *
		 * Returning a non-null value will effectively short-circuit get_avatar(), passing
		 * the value through the {@see 'get_avatar'} filter and returning early.
		 *
		 * @since 4.2.0
		 *
		 * @param string|null $avatar      HTML for the user's avatar. Default null.
		 * @param mixed       $id_or_email The avatar to retrieve. Accepts a user ID, Gravatar MD5 hash,
		 *                                 user email, WP_User object, WP_Post object, or WP_Comment object.
		 * @param array       $args        Arguments passed to get_avatar_url(), after processing.
		 */
		$avatar = apply_filters( 'pre_get_avatar', null, $id_or_email, $args );

		if ( ! is_null( $avatar ) ) {
			/** This filter is documented in wp-includes/pluggable.php */
			return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args );
		}

		if ( ! $args['force_display'] && ! get_option( 'show_avatars' ) ) {
			return false;
		}

		$url2x = get_avatar_url( $id_or_email, array_merge( $args, array( 'size' => $args['size'] * 2 ) ) );

		$args = get_avatar_data( $id_or_email, $args );

		$url = $args['url'];

		if ( ! $url || is_wp_error( $url ) ) {
			return false;
		}

		$class = array( 'avatar', 'avatar-' . (int) $args['size'], 'photo' );

		if ( ! $args['found_avatar'] || $args['force_default'] ) {
			$class[] = 'avatar-default';
		}

		if ( $args['class'] ) {
			if ( is_array( $args['class'] ) ) {
				$class = array_merge( $class, $args['class'] );
			} else {
				$class[] = $args['class'];
			}
		}

		// Add `loading`, `fetchpriority`, and `decoding` attributes.
		$extra_attr = $args['extra_attr'];

		if ( in_array( $args['loading'], array( 'lazy', 'eager' ), true )
			&& ! preg_match( '/\bloading\s*=/', $extra_attr )
		) {
			if ( ! empty( $extra_attr ) ) {
				$extra_attr .= ' ';
			}

			$extra_attr .= "loading='{$args['loading']}'";
		}

		if ( in_array( $args['fetchpriority'], array( 'high', 'low', 'auto' ), true )
			&& ! preg_match( '/\bfetchpriority\s*=/', $extra_attr )
		) {
			if ( ! empty( $extra_attr ) ) {
				$extra_attr .= ' ';
			}

			$extra_attr .= "fetchpriority='{$args['fetchpriority']}'";
		}

		if ( in_array( $args['decoding'], array( 'async', 'sync', 'auto' ), true )
			&& ! preg_match( '/\bdecoding\s*=/', $extra_attr )
		) {
			if ( ! empty( $extra_attr ) ) {
				$extra_attr .= ' ';
			}

			$extra_attr .= "decoding='{$args['decoding']}'";
		}

		$avatar = sprintf(
			"<img alt='%s' src='%s' srcset='%s' class='%s' height='%d' width='%d' %s/>",
			esc_attr( $args['alt'] ),
			esc_url( $url ),
			esc_url( $url2x ) . ' 2x',
			esc_attr( implode( ' ', $class ) ),
			(int) $args['height'],
			(int) $args['width'],
			$extra_attr
		);

		/**
		 * Filters the HTML for a user's avatar.
		 *
		 * @since 2.5.0
		 * @since 4.2.0 Added the `$args` parameter.
		 *
		 * @param string $avatar        HTML for the user's avatar.
		 * @param mixed  $id_or_email   The avatar to retrieve. Accepts a user ID, Gravatar MD5 hash,
		 *                              user email, WP_User object, WP_Post object, or WP_Comment object.
		 * @param int    $size          Height and width of the avatar in pixels.
		 * @param string $default_value URL for the default image or a default type. Accepts:
		 *                              - '404' (return a 404 instead of a default image)
		 *                              - 'retro' (a 8-bit arcade-style pixelated face)
		 *                              - 'robohash' (a robot)
		 *                              - 'monsterid' (a monster)
		 *                              - 'wavatar' (a cartoon face)
		 *                              - 'identicon' (the "quilt", a geometric pattern)
		 *                              - 'mystery', 'mm', or 'mysteryman' (The Oyster Man)
		 *                              - 'blank' (transparent GIF)
		 *                              - 'gravatar_default' (the Gravatar logo)
		 * @param string $alt           Alternative text to use in the avatar image tag.
		 * @param array  $args          Arguments passed to get_avatar_data(), after processing.
		 */
		return apply_filters( 'get_avatar', $avatar, $id_or_email, $args['size'], $args['default'], $args['alt'], $args );
	}
endif;

if ( ! function_exists( 'wp_text_diff' ) ) :
	/**
	 * Displays a human readable HTML representation of the difference between two strings.
	 *
	 * The Diff is available for getting the changes between versions. The output is
	 * HTML, so the primary use is for displaying the changes. If the two strings
	 * are equivalent, then an empty string will be returned.
	 *
	 * @since 2.6.0
	 *
	 * @see wp_parse_args() Used to change defaults to user defined settings.
	 * @uses Text_Diff
	 * @uses WP_Text_Diff_Renderer_Table
	 *
	 * @param string       $left_string  "old" (left) version of string.
	 * @param string       $right_string "new" (right) version of string.
	 * @param string|array $args {
	 *     Associative array of options to pass to WP_Text_Diff_Renderer_Table().
	 *
	 *     @type string $title           Titles the diff in a manner compatible
	 *                                   with the output. Default empty.
	 *     @type string $title_left      Change the HTML to the left of the title.
	 *                                   Default empty.
	 *     @type string $title_right     Change the HTML to the right of the title.
	 *                                   Default empty.
	 *     @type bool   $show_split_view True for split view (two columns), false for
	 *                                   un-split view (single column). Default true.
	 * }
	 * @return string Empty string if strings are equivalent or HTML with differences.
	 */
	function wp_text_diff( $left_string, $right_string, $args = null ) {
		$defaults = array(
			'title'           => '',
			'title_left'      => '',
			'title_right'     => '',
			'show_split_view' => true,
		);
		$args     = wp_parse_args( $args, $defaults );

		if ( ! class_exists( 'WP_Text_Diff_Renderer_Table', false ) ) {
			require ABSPATH . WPINC . '/wp-diff.php';
		}

		$left_string  = normalize_whitespace( $left_string );
		$right_string = normalize_whitespace( $right_string );

		$left_lines  = explode( "\n", $left_string );
		$right_lines = explode( "\n", $right_string );
		$text_diff   = new Text_Diff( $left_lines, $right_lines );
		$renderer    = new WP_Text_Diff_Renderer_Table( $args );
		$diff        = $renderer->render( $text_diff );

		if ( ! $diff ) {
			return '';
		}

		$is_split_view       = ! empty( $args['show_split_view'] );
		$is_split_view_class = $is_split_view ? ' is-split-view' : '';

		$r = "<table class='diff$is_split_view_class'>\n";

		if ( $args['title'] ) {
			$r .= "<caption class='diff-title'>$args[title]</caption>\n";
		}

		if ( $args['title_left'] || $args['title_right'] ) {
			$r .= '<thead>';
		}

		if ( $args['title_left'] || $args['title_right'] ) {
			$th_or_td_left  = empty( $args['title_left'] ) ? 'td' : 'th';
			$th_or_td_right = empty( $args['title_right'] ) ? 'td' : 'th';

			$r .= "<tr class='diff-sub-title'>\n";
			$r .= "\t<$th_or_td_left>$args[title_left]</$th_or_td_left>\n";
			if ( $is_split_view ) {
				$r .= "\t<$th_or_td_right>$args[title_right]</$th_or_td_right>\n";
			}
			$r .= "</tr>\n";
		}

		if ( $args['title_left'] || $args['title_right'] ) {
			$r .= "</thead>\n";
		}

		$r .= "<tbody>\n$diff\n</tbody>\n";
		$r .= '</table>';

		return $r;
	}
endif;
<?php
/**
 * Nav Menu API: Walker_Nav_Menu class
 *
 * @package WordPress
 * @subpackage Nav_Menus
 * @since 4.6.0
 */

/**
 * Core class used to implement an HTML list of nav menu items.
 *
 * @since 3.0.0
 *
 * @see Walker
 */
class Walker_Nav_Menu extends Walker {
	/**
	 * What the class handles.
	 *
	 * @since 3.0.0
	 * @var string
	 *
	 * @see Walker::$tree_type
	 */
	public $tree_type = array( 'post_type', 'taxonomy', 'custom' );

	/**
	 * Database fields to use.
	 *
	 * @since 3.0.0
	 * @todo Decouple this.
	 * @var string[]
	 *
	 * @see Walker::$db_fields
	 */
	public $db_fields = array(
		'parent' => 'menu_item_parent',
		'id'     => 'db_id',
	);

	/**
	 * The URL to the privacy policy page.
	 *
	 * @since 6.8.0
	 * @var string
	 */
	private $privacy_policy_url;

	/**
	 * Constructor.
	 *
	 * @since 6.8.0
	 */
	public function __construct() {
		$this->privacy_policy_url = get_privacy_policy_url();
	}

	/**
	 * Starts the list before the elements are added.
	 *
	 * @since 3.0.0
	 *
	 * @see Walker::start_lvl()
	 *
	 * @param string   $output Used to append additional content (passed by reference).
	 * @param int      $depth  Depth of menu item. Used for padding.
	 * @param stdClass $args   An object of wp_nav_menu() arguments.
	 */
	public function start_lvl( &$output, $depth = 0, $args = null ) {
		if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
			$t = '';
			$n = '';
		} else {
			$t = "\t";
			$n = "\n";
		}
		$indent = str_repeat( $t, $depth );

		// Default class.
		$classes = array( 'sub-menu' );

		/**
		 * Filters the CSS class(es) applied to a menu list element.
		 *
		 * @since 4.8.0
		 *
		 * @param string[] $classes Array of the CSS classes that are applied to the menu `<ul>` element.
		 * @param stdClass $args    An object of `wp_nav_menu()` arguments.
		 * @param int      $depth   Depth of menu item. Used for padding.
		 */
		$class_names = implode( ' ', apply_filters( 'nav_menu_submenu_css_class', $classes, $args, $depth ) );

		$atts          = array();
		$atts['class'] = ! empty( $class_names ) ? $class_names : '';

		/**
		 * Filters the HTML attributes applied to a menu list element.
		 *
		 * @since 6.3.0
		 *
		 * @param array $atts {
		 *     The HTML attributes applied to the `<ul>` element, empty strings are ignored.
		 *
		 *     @type string $class    HTML CSS class attribute.
		 * }
		 * @param stdClass $args      An object of `wp_nav_menu()` arguments.
		 * @param int      $depth     Depth of menu item. Used for padding.
		 */
		$atts       = apply_filters( 'nav_menu_submenu_attributes', $atts, $args, $depth );
		$attributes = $this->build_atts( $atts );

		$output .= "{$n}{$indent}<ul{$attributes}>{$n}";
	}

	/**
	 * Ends the list of after the elements are added.
	 *
	 * @since 3.0.0
	 *
	 * @see Walker::end_lvl()
	 *
	 * @param string   $output Used to append additional content (passed by reference).
	 * @param int      $depth  Depth of menu item. Used for padding.
	 * @param stdClass $args   An object of wp_nav_menu() arguments.
	 */
	public function end_lvl( &$output, $depth = 0, $args = null ) {
		if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
			$t = '';
			$n = '';
		} else {
			$t = "\t";
			$n = "\n";
		}
		$indent  = str_repeat( $t, $depth );
		$output .= "$indent</ul>{$n}";
	}

	/**
	 * Starts the element output.
	 *
	 * @since 3.0.0
	 * @since 4.4.0 The {@see 'nav_menu_item_args'} filter was added.
	 * @since 5.9.0 Renamed `$item` to `$data_object` and `$id` to `$current_object_id`
	 *              to match parent class for PHP 8 named parameter support.
	 * @since 6.7.0 Removed redundant title attributes.
	 *
	 * @see Walker::start_el()
	 *
	 * @param string   $output            Used to append additional content (passed by reference).
	 * @param WP_Post  $data_object       Menu item data object.
	 * @param int      $depth             Depth of menu item. Used for padding.
	 * @param stdClass $args              An object of wp_nav_menu() arguments.
	 * @param int      $current_object_id Optional. ID of the current menu item. Default 0.
	 */
	public function start_el( &$output, $data_object, $depth = 0, $args = null, $current_object_id = 0 ) {
		// Restores the more descriptive, specific name for use within this method.
		$menu_item = $data_object;

		if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
			$t = '';
			$n = '';
		} else {
			$t = "\t";
			$n = "\n";
		}
		$indent = ( $depth ) ? str_repeat( $t, $depth ) : '';

		$classes   = empty( $menu_item->classes ) ? array() : (array) $menu_item->classes;
		$classes[] = 'menu-item-' . $menu_item->ID;

		/**
		 * Filters the arguments for a single nav menu item.
		 *
		 * @since 4.4.0
		 *
		 * @param stdClass $args      An object of wp_nav_menu() arguments.
		 * @param WP_Post  $menu_item Menu item data object.
		 * @param int      $depth     Depth of menu item. Used for padding.
		 */
		$args = apply_filters( 'nav_menu_item_args', $args, $menu_item, $depth );

		/**
		 * Filters the CSS classes applied to a menu item's list item element.
		 *
		 * @since 3.0.0
		 * @since 4.1.0 The `$depth` parameter was added.
		 *
		 * @param string[] $classes   Array of the CSS classes that are applied to the menu item's `<li>` element.
		 * @param WP_Post  $menu_item The current menu item object.
		 * @param stdClass $args      An object of wp_nav_menu() arguments.
		 * @param int      $depth     Depth of menu item. Used for padding.
		 */
		$class_names = implode( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $menu_item, $args, $depth ) );

		/**
		 * Filters the ID attribute applied to a menu item's list item element.
		 *
		 * @since 3.0.1
		 * @since 4.1.0 The `$depth` parameter was added.
		 *
		 * @param string   $menu_item_id The ID attribute applied to the menu item's `<li>` element.
		 * @param WP_Post  $menu_item    The current menu item.
		 * @param stdClass $args         An object of wp_nav_menu() arguments.
		 * @param int      $depth        Depth of menu item. Used for padding.
		 */
		$id = apply_filters( 'nav_menu_item_id', 'menu-item-' . $menu_item->ID, $menu_item, $args, $depth );

		$li_atts          = array();
		$li_atts['id']    = ! empty( $id ) ? $id : '';
		$li_atts['class'] = ! empty( $class_names ) ? $class_names : '';

		/**
		 * Filters the HTML attributes applied to a menu's list item element.
		 *
		 * @since 6.3.0
		 *
		 * @param array $li_atts {
		 *     The HTML attributes applied to the menu item's `<li>` element, empty strings are ignored.
		 *
		 *     @type string $class        HTML CSS class attribute.
		 *     @type string $id           HTML id attribute.
		 * }
		 * @param WP_Post  $menu_item The current menu item object.
		 * @param stdClass $args      An object of wp_nav_menu() arguments.
		 * @param int      $depth     Depth of menu item. Used for padding.
		 */
		$li_atts       = apply_filters( 'nav_menu_item_attributes', $li_atts, $menu_item, $args, $depth );
		$li_attributes = $this->build_atts( $li_atts );

		$output .= $indent . '<li' . $li_attributes . '>';

		/** This filter is documented in wp-includes/post-template.php */
		$title = apply_filters( 'the_title', $menu_item->title, $menu_item->ID );

		// Save filtered value before filtering again.
		$the_title_filtered = $title;

		/**
		 * Filters a menu item's title.
		 *
		 * @since 4.4.0
		 *
		 * @param string   $title     The menu item's title.
		 * @param WP_Post  $menu_item The current menu item object.
		 * @param stdClass $args      An object of wp_nav_menu() arguments.
		 * @param int      $depth     Depth of menu item. Used for padding.
		 */
		$title = apply_filters( 'nav_menu_item_title', $title, $menu_item, $args, $depth );

		$atts           = array();
		$atts['target'] = ! empty( $menu_item->target ) ? $menu_item->target : '';
		$atts['rel']    = ! empty( $menu_item->xfn ) ? $menu_item->xfn : '';

		if ( ! empty( $menu_item->url ) ) {
			if ( $this->privacy_policy_url === $menu_item->url ) {
				$atts['rel'] = empty( $atts['rel'] ) ? 'privacy-policy' : $atts['rel'] . ' privacy-policy';
			}

			$atts['href'] = $menu_item->url;
		} else {
			$atts['href'] = '';
		}

		$atts['aria-current'] = $menu_item->current ? 'page' : '';

		// Add title attribute only if it does not match the link text (before or after filtering).
		if ( ! empty( $menu_item->attr_title )
			&& trim( strtolower( $menu_item->attr_title ) ) !== trim( strtolower( $menu_item->title ) )
			&& trim( strtolower( $menu_item->attr_title ) ) !== trim( strtolower( $the_title_filtered ) )
			&& trim( strtolower( $menu_item->attr_title ) ) !== trim( strtolower( $title ) )
		) {
			$atts['title'] = $menu_item->attr_title;
		} else {
			$atts['title'] = '';
		}

		/**
		 * Filters the HTML attributes applied to a menu item's anchor element.
		 *
		 * @since 3.6.0
		 * @since 4.1.0 The `$depth` parameter was added.
		 *
		 * @param array $atts {
		 *     The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
		 *
		 *     @type string $title        Title attribute.
		 *     @type string $target       Target attribute.
		 *     @type string $rel          The rel attribute.
		 *     @type string $href         The href attribute.
		 *     @type string $aria-current The aria-current attribute.
		 * }
		 * @param WP_Post  $menu_item The current menu item object.
		 * @param stdClass $args      An object of wp_nav_menu() arguments.
		 * @param int      $depth     Depth of menu item. Used for padding.
		 */
		$atts       = apply_filters( 'nav_menu_link_attributes', $atts, $menu_item, $args, $depth );
		$attributes = $this->build_atts( $atts );

		$item_output  = $args->before;
		$item_output .= '<a' . $attributes . '>';
		$item_output .= $args->link_before . $title . $args->link_after;
		$item_output .= '</a>';
		$item_output .= $args->after;

		/**
		 * Filters a menu item's starting output.
		 *
		 * The menu item's starting output only includes `$args->before`, the opening `<a>`,
		 * the menu item's title, the closing `</a>`, and `$args->after`. Currently, there is
		 * no filter for modifying the opening and closing `<li>` for a menu item.
		 *
		 * @since 3.0.0
		 *
		 * @param string   $item_output The menu item's starting HTML output.
		 * @param WP_Post  $menu_item   Menu item data object.
		 * @param int      $depth       Depth of menu item. Used for padding.
		 * @param stdClass $args        An object of wp_nav_menu() arguments.
		 */
		$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $menu_item, $depth, $args );
	}

	/**
	 * Ends the element output, if needed.
	 *
	 * @since 3.0.0
	 * @since 5.9.0 Renamed `$item` to `$data_object` to match parent class for PHP 8 named parameter support.
	 *
	 * @see Walker::end_el()
	 *
	 * @param string   $output      Used to append additional content (passed by reference).
	 * @param WP_Post  $data_object Menu item data object. Not used.
	 * @param int      $depth       Depth of page. Not Used.
	 * @param stdClass $args        An object of wp_nav_menu() arguments.
	 */
	public function end_el( &$output, $data_object, $depth = 0, $args = null ) {
		if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
			$t = '';
			$n = '';
		} else {
			$t = "\t";
			$n = "\n";
		}
		$output .= "</li>{$n}";
	}

	/**
	 * Builds a string of HTML attributes from an array of key/value pairs.
	 * Empty values are ignored.
	 *
	 * @since 6.3.0
	 *
	 * @param  array $atts Optional. An array of HTML attribute key/value pairs. Default empty array.
	 * @return string A string of HTML attributes.
	 */
	protected function build_atts( $atts = array() ) {
		$attribute_string = '';
		foreach ( $atts as $attr => $value ) {
			if ( false !== $value && '' !== $value && is_scalar( $value ) ) {
				$value             = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
				$attribute_string .= ' ' . $attr . '="' . $value . '"';
			}
		}
		return $attribute_string;
	}
}
<?php
/**
 * Blocks API: WP_Block_Editor_Context class
 *
 * @package WordPress
 * @since 5.8.0
 */

/**
 * Contains information about a block editor being rendered.
 *
 * @since 5.8.0
 */
#[AllowDynamicProperties]
final class WP_Block_Editor_Context {
	/**
	 * String that identifies the block editor being rendered. Can be one of:
	 *
	 * - `'core/edit-post'`         - The post editor at `/wp-admin/edit.php`.
	 * - `'core/edit-widgets'`      - The widgets editor at `/wp-admin/widgets.php`.
	 * - `'core/customize-widgets'` - The widgets editor at `/wp-admin/customize.php`.
	 * - `'core/edit-site'`         - The site editor at `/wp-admin/site-editor.php`.
	 *
	 * Defaults to 'core/edit-post'.
	 *
	 * @since 6.0.0
	 *
	 * @var string
	 */
	public $name = 'core/edit-post';

	/**
	 * The post being edited by the block editor. Optional.
	 *
	 * @since 5.8.0
	 *
	 * @var WP_Post|null
	 */
	public $post = null;

	/**
	 * Constructor.
	 *
	 * Populates optional properties for a given block editor context.
	 *
	 * @since 5.8.0
	 *
	 * @param array $settings The list of optional settings to expose in a given context.
	 */
	public function __construct( array $settings = array() ) {
		if ( isset( $settings['name'] ) ) {
			$this->name = $settings['name'];
		}
		if ( isset( $settings['post'] ) ) {
			$this->post = $settings['post'];
		}
	}
}
<?php
/**
 * WordPress Customize Section classes
 *
 * @package WordPress
 * @subpackage Customize
 * @since 3.4.0
 */

/**
 * Customize Section class.
 *
 * A UI container for controls, managed by the WP_Customize_Manager class.
 *
 * @since 3.4.0
 *
 * @see WP_Customize_Manager
 */
#[AllowDynamicProperties]
class WP_Customize_Section {

	/**
	 * Incremented with each new class instantiation, then stored in $instance_number.
	 *
	 * Used when sorting two instances whose priorities are equal.
	 *
	 * @since 4.1.0
	 * @var int
	 */
	protected static $instance_count = 0;

	/**
	 * Order in which this instance was created in relation to other instances.
	 *
	 * @since 4.1.0
	 * @var int
	 */
	public $instance_number;

	/**
	 * WP_Customize_Manager instance.
	 *
	 * @since 3.4.0
	 * @var WP_Customize_Manager
	 */
	public $manager;

	/**
	 * Unique identifier.
	 *
	 * @since 3.4.0
	 * @var string
	 */
	public $id;

	/**
	 * Priority of the section which informs load order of sections.
	 *
	 * @since 3.4.0
	 * @var int
	 */
	public $priority = 160;

	/**
	 * Panel in which to show the section, making it a sub-section.
	 *
	 * @since 4.0.0
	 * @var string
	 */
	public $panel = '';

	/**
	 * Capability required for the section.
	 *
	 * @since 3.4.0
	 * @var string
	 */
	public $capability = 'edit_theme_options';

	/**
	 * Theme features required to support the section.
	 *
	 * @since 3.4.0
	 * @var string|string[]
	 */
	public $theme_supports = '';

	/**
	 * Title of the section to show in UI.
	 *
	 * @since 3.4.0
	 * @var string
	 */
	public $title = '';

	/**
	 * Description to show in the UI.
	 *
	 * @since 3.4.0
	 * @var string
	 */
	public $description = '';

	/**
	 * Customizer controls for this section.
	 *
	 * @since 3.4.0
	 * @var array
	 */
	public $controls;

	/**
	 * Type of this section.
	 *
	 * @since 4.1.0
	 * @var string
	 */
	public $type = 'default';

	/**
	 * Active callback.
	 *
	 * @since 4.1.0
	 *
	 * @see WP_Customize_Section::active()
	 *
	 * @var callable Callback is called with one argument, the instance of
	 *               WP_Customize_Section, and returns bool to indicate whether
	 *               the section is active (such as it relates to the URL currently
	 *               being previewed).
	 */
	public $active_callback = '';

	/**
	 * Show the description or hide it behind the help icon.
	 *
	 * @since 4.7.0
	 *
	 * @var bool Indicates whether the Section's description should be
	 *           hidden behind a help icon ("?") in the Section header,
	 *           similar to how help icons are displayed on Panels.
	 */
	public $description_hidden = false;

	/**
	 * Constructor.
	 *
	 * Any supplied $args override class property defaults.
	 *
	 * @since 3.4.0
	 *
	 * @param WP_Customize_Manager $manager Customizer bootstrap instance.
	 * @param string               $id      A specific ID of the section.
	 * @param array                $args    {
	 *     Optional. Array of properties for the new Section object. Default empty array.
	 *
	 *     @type int             $priority           Priority of the section, defining the display order
	 *                                               of panels and sections. Default 160.
	 *     @type string          $panel              The panel this section belongs to (if any).
	 *                                               Default empty.
	 *     @type string          $capability         Capability required for the section.
	 *                                               Default 'edit_theme_options'
	 *     @type string|string[] $theme_supports     Theme features required to support the section.
	 *     @type string          $title              Title of the section to show in UI.
	 *     @type string          $description        Description to show in the UI.
	 *     @type string          $type               Type of the section.
	 *     @type callable        $active_callback    Active callback.
	 *     @type bool            $description_hidden Hide the description behind a help icon,
	 *                                               instead of inline above the first control.
	 *                                               Default false.
	 * }
	 */
	public function __construct( $manager, $id, $args = array() ) {
		$keys = array_keys( get_object_vars( $this ) );
		foreach ( $keys as $key ) {
			if ( isset( $args[ $key ] ) ) {
				$this->$key = $args[ $key ];
			}
		}

		$this->manager = $manager;
		$this->id      = $id;
		if ( empty( $this->active_callback ) ) {
			$this->active_callback = array( $this, 'active_callback' );
		}
		self::$instance_count += 1;
		$this->instance_number = self::$instance_count;

		$this->controls = array(); // Users cannot customize the $controls array.
	}

	/**
	 * Check whether section is active to current Customizer preview.
	 *
	 * @since 4.1.0
	 *
	 * @return bool Whether the section is active to the current preview.
	 */
	final public function active() {
		$section = $this;
		$active  = call_user_func( $this->active_callback, $this );

		/**
		 * Filters response of WP_Customize_Section::active().
		 *
		 * @since 4.1.0
		 *
		 * @param bool                 $active  Whether the Customizer section is active.
		 * @param WP_Customize_Section $section WP_Customize_Section instance.
		 */
		$active = apply_filters( 'customize_section_active', $active, $section );

		return $active;
	}

	/**
	 * Default callback used when invoking WP_Customize_Section::active().
	 *
	 * Subclasses can override this with their specific logic, or they may provide
	 * an 'active_callback' argument to the constructor.
	 *
	 * @since 4.1.0
	 *
	 * @return true Always true.
	 */
	public function active_callback() {
		return true;
	}

	/**
	 * Gather the parameters passed to client JavaScript via JSON.
	 *
	 * @since 4.1.0
	 *
	 * @return array The array to be exported to the client as JSON.
	 */
	public function json() {
		$array                   = wp_array_slice_assoc( (array) $this, array( 'id', 'description', 'priority', 'panel', 'type', 'description_hidden' ) );
		$array['title']          = html_entity_decode( $this->title, ENT_QUOTES, get_bloginfo( 'charset' ) );
		$array['content']        = $this->get_content();
		$array['active']         = $this->active();
		$array['instanceNumber'] = $this->instance_number;

		if ( $this->panel ) {
			/* translators: &#9656; is the unicode right-pointing triangle. %s: Section title in the Customizer. */
			$array['customizeAction'] = sprintf( __( 'Customizing &#9656; %s' ), esc_html( $this->manager->get_panel( $this->panel )->title ) );
		} else {
			$array['customizeAction'] = __( 'Customizing' );
		}

		return $array;
	}

	/**
	 * Checks required user capabilities and whether the theme has the
	 * feature support required by the section.
	 *
	 * @since 3.4.0
	 *
	 * @return bool False if theme doesn't support the section or user doesn't have the capability.
	 */
	final public function check_capabilities() {
		if ( $this->capability && ! current_user_can( $this->capability ) ) {
			return false;
		}

		if ( $this->theme_supports && ! current_theme_supports( ...(array) $this->theme_supports ) ) {
			return false;
		}

		return true;
	}

	/**
	 * Get the section's content for insertion into the Customizer pane.
	 *
	 * @since 4.1.0
	 *
	 * @return string Contents of the section.
	 */
	final public function get_content() {
		ob_start();
		$this->maybe_render();
		return trim( ob_get_clean() );
	}

	/**
	 * Check capabilities and render the section.
	 *
	 * @since 3.4.0
	 */
	final public function maybe_render() {
		if ( ! $this->check_capabilities() ) {
			return;
		}

		/**
		 * Fires before rendering a Customizer section.
		 *
		 * @since 3.4.0
		 *
		 * @param WP_Customize_Section $section WP_Customize_Section instance.
		 */
		do_action( 'customize_render_section', $this );
		/**
		 * Fires before rendering a specific Customizer section.
		 *
		 * The dynamic portion of the hook name, `$this->id`, refers to the ID
		 * of the specific Customizer section to be rendered.
		 *
		 * @since 3.4.0
		 */
		do_action( "customize_render_section_{$this->id}" );

		$this->render();
	}

	/**
	 * Render the section UI in a subclass.
	 *
	 * Sections are now rendered in JS by default, see WP_Customize_Section::print_template().
	 *
	 * @since 3.4.0
	 */
	protected function render() {}

	/**
	 * Render the section's JS template.
	 *
	 * This function is only run for section types that have been registered with
	 * WP_Customize_Manager::register_section_type().
	 *
	 * @since 4.3.0
	 *
	 * @see WP_Customize_Manager::render_template()
	 */
	public function print_template() {
		?>
		<script type="text/html" id="tmpl-customize-section-<?php echo $this->type; ?>">
			<?php $this->render_template(); ?>
		</script>
		<?php
	}

	/**
	 * An Underscore (JS) template for rendering this section.
	 *
	 * Class variables for this section class are available in the `data` JS object;
	 * export custom variables by overriding WP_Customize_Section::json().
	 *
	 * @since 4.3.0
	 *
	 * @see WP_Customize_Section::print_template()
	 */
	protected function render_template() {
		?>
		<li id="accordion-section-{{ data.id }}" class="accordion-section control-section control-section-{{ data.type }}">
			<h3 class="accordion-section-title">
				<button type="button" class="accordion-trigger" aria-expanded="false" aria-controls="{{ data.id }}-content">
					{{ data.title }}
				</button>
			</h3>
			<ul class="accordion-section-content" id="{{ data.id }}-content">
				<li class="customize-section-description-container section-meta <# if ( data.description_hidden ) { #>customize-info<# } #>">
					<div class="customize-section-title">
						<button class="customize-section-back" tabindex="-1">
							<span class="screen-reader-text">
								<?php
								/* translators: Hidden accessibility text. */
								_e( 'Back' );
								?>
							</span>
						</button>
						<h3>
							<span class="customize-action">
								{{{ data.customizeAction }}}
							</span>
							{{ data.title }}
						</h3>
						<# if ( data.description && data.description_hidden ) { #>
							<button type="button" class="customize-help-toggle dashicons dashicons-editor-help" aria-expanded="false"><span class="screen-reader-text">
								<?php
								/* translators: Hidden accessibility text. */
								_e( 'Help' );
								?>
							</span></button>
							<div class="description customize-section-description">
								{{{ data.description }}}
							</div>
						<# } #>

						<div class="customize-control-notifications-container"></div>
					</div>

					<# if ( data.description && ! data.description_hidden ) { #>
						<div class="description customize-section-description">
							{{{ data.description }}}
						</div>
					<# } #>
				</li>
			</ul>
		</li>
		<?php
	}
}

/** WP_Customize_Themes_Section class */
require_once ABSPATH . WPINC . '/customize/class-wp-customize-themes-section.php';

/** WP_Customize_Sidebar_Section class */
require_once ABSPATH . WPINC . '/customize/class-wp-customize-sidebar-section.php';

/** WP_Customize_Nav_Menu_Section class */
require_once ABSPATH . WPINC . '/customize/class-wp-customize-nav-menu-section.php';
/**
 * @output wp-includes/js/wp-emoji-loader.js
 */

/* eslint-env es6 */

// Note: This is loaded as a script module, so there is no need for an IIFE to prevent pollution of the global scope.

/**
 * Emoji Settings as exported in PHP via _print_emoji_detection_script().
 * @typedef WPEmojiSettings
 * @type {object}
 * @property {?object} source
 * @property {?string} source.concatemoji
 * @property {?string} source.twemoji
 * @property {?string} source.wpemoji
 */

const settings = /** @type {WPEmojiSettings} */ (
	JSON.parse( document.getElementById( 'wp-emoji-settings' ).textContent )
);

// For compatibility with other scripts that read from this global, in particular wp-includes/js/wp-emoji.js (source file: js/_enqueues/wp/emoji.js).
window._wpemojiSettings = settings;

/**
 * Support tests.
 * @typedef SupportTests
 * @type {object}
 * @property {?boolean} flag
 * @property {?boolean} emoji
 */

const sessionStorageKey = 'wpEmojiSettingsSupports';
const tests = [ 'flag', 'emoji' ];

/**
 * Checks whether the browser supports offloading to a Worker.
 *
 * @since 6.3.0
 *
 * @private
 *
 * @returns {boolean}
 */
function supportsWorkerOffloading() {
	return (
		typeof Worker !== 'undefined' &&
		typeof OffscreenCanvas !== 'undefined' &&
		typeof URL !== 'undefined' &&
		URL.createObjectURL &&
		typeof Blob !== 'undefined'
	);
}

/**
 * @typedef SessionSupportTests
 * @type {object}
 * @property {number} timestamp
 * @property {SupportTests} supportTests
 */

/**
 * Get support tests from session.
 *
 * @since 6.3.0
 *
 * @private
 *
 * @returns {?SupportTests} Support tests, or null if not set or older than 1 week.
 */
function getSessionSupportTests() {
	try {
		/** @type {SessionSupportTests} */
		const item = JSON.parse(
			sessionStorage.getItem( sessionStorageKey )
		);
		if (
			typeof item === 'object' &&
			typeof item.timestamp === 'number' &&
			new Date().valueOf() < item.timestamp + 604800 && // Note: Number is a week in seconds.
			typeof item.supportTests === 'object'
		) {
			return item.supportTests;
		}
	} catch ( e ) {}
	return null;
}

/**
 * Persist the supports in session storage.
 *
 * @since 6.3.0
 *
 * @private
 *
 * @param {SupportTests} supportTests Support tests.
 */
function setSessionSupportTests( supportTests ) {
	try {
		/** @type {SessionSupportTests} */
		const item = {
			supportTests: supportTests,
			timestamp: new Date().valueOf()
		};

		sessionStorage.setItem(
			sessionStorageKey,
			JSON.stringify( item )
		);
	} catch ( e ) {}
}

/**
 * Checks if two sets of Emoji characters render the same visually.
 *
 * This is used to determine if the browser is rendering an emoji with multiple data points
 * correctly. set1 is the emoji in the correct form, using a zero-width joiner. set2 is the emoji
 * in the incorrect form, using a zero-width space. If the two sets render the same, then the browser
 * does not support the emoji correctly.
 *
 * This function may be serialized to run in a Worker. Therefore, it cannot refer to variables from the containing
 * scope. Everything must be passed by parameters.
 *
 * @since 4.9.0
 *
 * @private
 *
 * @param {CanvasRenderingContext2D} context 2D Context.
 * @param {string} set1 Set of Emoji to test.
 * @param {string} set2 Set of Emoji to test.
 *
 * @return {boolean} True if the two sets render the same.
 */
function emojiSetsRenderIdentically( context, set1, set2 ) {
	// Cleanup from previous test.
	context.clearRect( 0, 0, context.canvas.width, context.canvas.height );
	context.fillText( set1, 0, 0 );
	const rendered1 = new Uint32Array(
		context.getImageData(
			0,
			0,
			context.canvas.width,
			context.canvas.height
		).data
	);

	// Cleanup from previous test.
	context.clearRect( 0, 0, context.canvas.width, context.canvas.height );
	context.fillText( set2, 0, 0 );
	const rendered2 = new Uint32Array(
		context.getImageData(
			0,
			0,
			context.canvas.width,
			context.canvas.height
		).data
	);

	return rendered1.every( ( rendered2Data, index ) => {
		return rendered2Data === rendered2[ index ];
	} );
}

/**
 * Checks if the center point of a single emoji is empty.
 *
 * This is used to determine if the browser is rendering an emoji with a single data point
 * correctly. The center point of an incorrectly rendered emoji will be empty. A correctly
 * rendered emoji will have a non-zero value at the center point.
 *
 * This function may be serialized to run in a Worker. Therefore, it cannot refer to variables from the containing
 * scope. Everything must be passed by parameters.
 *
 * @since 6.8.2
 *
 * @private
 *
 * @param {CanvasRenderingContext2D} context 2D Context.
 * @param {string} emoji Emoji to test.
 *
 * @return {boolean} True if the center point is empty.
 */
function emojiRendersEmptyCenterPoint( context, emoji ) {
	// Cleanup from previous test.
	context.clearRect( 0, 0, context.canvas.width, context.canvas.height );
	context.fillText( emoji, 0, 0 );

	// Test if the center point (16, 16) is empty (0,0,0,0).
	const centerPoint = context.getImageData(16, 16, 1, 1);
	for ( let i = 0; i < centerPoint.data.length; i++ ) {
		if ( centerPoint.data[ i ] !== 0 ) {
			// Stop checking the moment it's known not to be empty.
			return false;
		}
	}

	return true;
}

/**
 * Determines if the browser properly renders Emoji that Twemoji can supplement.
 *
 * This function may be serialized to run in a Worker. Therefore, it cannot refer to variables from the containing
 * scope. Everything must be passed by parameters.
 *
 * @since 4.2.0
 *
 * @private
 *
 * @param {CanvasRenderingContext2D} context 2D Context.
 * @param {string} type Whether to test for support of "flag" or "emoji".
 * @param {Function} emojiSetsRenderIdentically Reference to emojiSetsRenderIdentically function, needed due to minification.
 * @param {Function} emojiRendersEmptyCenterPoint Reference to emojiRendersEmptyCenterPoint function, needed due to minification.
 *
 * @return {boolean} True if the browser can render emoji, false if it cannot.
 */
function browserSupportsEmoji( context, type, emojiSetsRenderIdentically, emojiRendersEmptyCenterPoint ) {
	let isIdentical;

	switch ( type ) {
		case 'flag':
			/*
			 * Test for Transgender flag compatibility. Added in Unicode 13.
			 *
			 * To test for support, we try to render it, and compare the rendering to how it would look if
			 * the browser doesn't render it correctly (white flag emoji + transgender symbol).
			 */
			isIdentical = emojiSetsRenderIdentically(
				context,
				'\uD83C\uDFF3\uFE0F\u200D\u26A7\uFE0F', // as a zero-width joiner sequence
				'\uD83C\uDFF3\uFE0F\u200B\u26A7\uFE0F' // separated by a zero-width space
			);

			if ( isIdentical ) {
				return false;
			}

			/*
			 * Test for Sark flag compatibility. This is the least supported of the letter locale flags,
			 * so gives us an easy test for full support.
			 *
			 * To test for support, we try to render it, and compare the rendering to how it would look if
			 * the browser doesn't render it correctly ([C] + [Q]).
			 */
			isIdentical = emojiSetsRenderIdentically(
				context,
				'\uD83C\uDDE8\uD83C\uDDF6', // as the sequence of two code points
				'\uD83C\uDDE8\u200B\uD83C\uDDF6' // as the two code points separated by a zero-width space
			);

			if ( isIdentical ) {
				return false;
			}

			/*
			 * Test for English flag compatibility. England is a country in the United Kingdom, it
			 * does not have a two letter locale code but rather a five letter sub-division code.
			 *
			 * To test for support, we try to render it, and compare the rendering to how it would look if
			 * the browser doesn't render it correctly (black flag emoji + [G] + [B] + [E] + [N] + [G]).
			 */
			isIdentical = emojiSetsRenderIdentically(
				context,
				// as the flag sequence
				'\uD83C\uDFF4\uDB40\uDC67\uDB40\uDC62\uDB40\uDC65\uDB40\uDC6E\uDB40\uDC67\uDB40\uDC7F',
				// with each code point separated by a zero-width space
				'\uD83C\uDFF4\u200B\uDB40\uDC67\u200B\uDB40\uDC62\u200B\uDB40\uDC65\u200B\uDB40\uDC6E\u200B\uDB40\uDC67\u200B\uDB40\uDC7F'
			);

			return ! isIdentical;
		case 'emoji':
			/*
			 * Is there a large, hairy, humanoid mythical creature living in the browser?
			 *
			 * To test for Emoji 17.0 support, try to render a new emoji: Hairy Creature.
			 *
			 * The hairy creature emoji is a single code point emoji. Testing for browser
			 * support required testing the center point of the emoji to see if it is empty.
			 *
			 * 0xD83E 0x1FAC8 (\uD83E\u1FAC8) == 🫈 Hairy creature.
			 *
			 * When updating this test, please ensure that the emoji is either a single code point
			 * or switch to using the emojiSetsRenderIdentically function and testing with a zero-width
			 * joiner vs a zero-width space.
			 */
			const notSupported = emojiRendersEmptyCenterPoint( context, '\uD83E\u1FAC8' );
			return ! notSupported;
	}

	return false;
}

/**
 * Checks emoji support tests.
 *
 * This function may be serialized to run in a Worker. Therefore, it cannot refer to variables from the containing
 * scope. Everything must be passed by parameters.
 *
 * @since 6.3.0
 *
 * @private
 *
 * @param {string[]} tests Tests.
 * @param {Function} browserSupportsEmoji Reference to browserSupportsEmoji function, needed due to minification.
 * @param {Function} emojiSetsRenderIdentically Reference to emojiSetsRenderIdentically function, needed due to minification.
 * @param {Function} emojiRendersEmptyCenterPoint Reference to emojiRendersEmptyCenterPoint function, needed due to minification.
 *
 * @return {SupportTests} Support tests.
 */
function testEmojiSupports( tests, browserSupportsEmoji, emojiSetsRenderIdentically, emojiRendersEmptyCenterPoint ) {
	let canvas;
	if (
		typeof WorkerGlobalScope !== 'undefined' &&
		self instanceof WorkerGlobalScope
	) {
		canvas = new OffscreenCanvas( 300, 150 ); // Dimensions are default for HTMLCanvasElement.
	} else {
		canvas = document.createElement( 'canvas' );
	}

	const context = canvas.getContext( '2d', { willReadFrequently: true } );

	/*
	 * Chrome on OS X added native emoji rendering in M41. Unfortunately,
	 * it doesn't work when the font is bolder than 500 weight. So, we
	 * check for bold rendering support to avoid invisible emoji in Chrome.
	 */
	context.textBaseline = 'top';
	context.font = '600 32px Arial';

	const supports = {};
	tests.forEach( ( test ) => {
		supports[ test ] = browserSupportsEmoji( context, test, emojiSetsRenderIdentically, emojiRendersEmptyCenterPoint );
	} );
	return supports;
}

/**
 * Adds a script to the head of the document.
 *
 * @ignore
 *
 * @since 4.2.0
 *
 * @param {string} src The url where the script is located.
 *
 * @return {void}
 */
function addScript( src ) {
	const script = document.createElement( 'script' );
	script.src = src;
	script.defer = true;
	document.head.appendChild( script );
}

settings.supports = {
	everything: true,
	everythingExceptFlag: true
};

// Obtain the emoji support from the browser, asynchronously when possible.
new Promise( ( resolve ) => {
	let supportTests = getSessionSupportTests();
	if ( supportTests ) {
		resolve( supportTests );
		return;
	}

	if ( supportsWorkerOffloading() ) {
		try {
			// Note that the functions are being passed as arguments due to minification.
			const workerScript =
				'postMessage(' +
				testEmojiSupports.toString() +
				'(' +
				[
					JSON.stringify( tests ),
					browserSupportsEmoji.toString(),
					emojiSetsRenderIdentically.toString(),
					emojiRendersEmptyCenterPoint.toString()
				].join( ',' ) +
				'));';
			const blob = new Blob( [ workerScript ], {
				type: 'text/javascript'
			} );
			const worker = new Worker( URL.createObjectURL( blob ), { name: 'wpTestEmojiSupports' } );
			worker.onmessage = ( event ) => {
				supportTests = event.data;
				setSessionSupportTests( supportTests );
				worker.terminate();
				resolve( supportTests );
			};
			return;
		} catch ( e ) {}
	}

	supportTests = testEmojiSupports( tests, browserSupportsEmoji, emojiSetsRenderIdentically, emojiRendersEmptyCenterPoint );
	setSessionSupportTests( supportTests );
	resolve( supportTests );
} )
	// Once the browser emoji support has been obtained from the session, finalize the settings.
	.then( ( supportTests ) => {
		/*
		 * Tests the browser support for flag emojis and other emojis, and adjusts the
		 * support settings accordingly.
		 */
		for ( const test in supportTests ) {
			settings.supports[ test ] = supportTests[ test ];

			settings.supports.everything =
				settings.supports.everything && settings.supports[ test ];

			if ( 'flag' !== test ) {
				settings.supports.everythingExceptFlag =
					settings.supports.everythingExceptFlag &&
					settings.supports[ test ];
			}
		}

		settings.supports.everythingExceptFlag =
			settings.supports.everythingExceptFlag &&
			! settings.supports.flag;

		// When the browser can not render everything we need to load a polyfill.
		if ( ! settings.supports.everything ) {
			const src = settings.source || {};

			if ( src.concatemoji ) {
				addScript( src.concatemoji );
			} else if ( src.wpemoji && src.twemoji ) {
				addScript( src.twemoji );
				addScript( src.wpemoji );
			}
		}
	} );
/*! This file is auto-generated */
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document.getElementById?t=isNaN(window.screenX)?(e=F.x-document.body.scrollLeft+window.screenLeft,F.y-document.body.scrollTop+window.screenTop):(e=F.x+window.screenX+(window.outerWidth-window.innerWidth)-window.pageXOffset,F.y+window.screenY+(window.outerHeight-24-window.innerHeight)-window.pageYOffset):document.all?(e=F.x-document.body.scrollLeft+window.screenLeft,t=F.y-document.body.scrollTop+window.screenTop):document.layers&&(e=F.x+window.screenX+(window.outerWidth-window.innerWidth)-window.pageXOffset,t=F.y+window.screenY+(window.outerHeight-24-window.innerHeight)-window.pageYOffset),F.x=e,F.y=t,F}function AnchorPosition_getPageOffsetLeft(F){for(var e=F.offsetLeft;null!=(F=F.offsetParent);)e+=F.offsetLeft;return e}function AnchorPosition_getWindowOffsetLeft(F){return AnchorPosition_getPageOffsetLeft(F)-document.body.scrollLeft}function AnchorPosition_getPageOffsetTop(F){for(var e=F.offsetTop;null!=(F=F.offsetParent);)e+=F.offsetTop;return e}function AnchorPosition_getWindowOffsetTop(F){return AnchorPosition_getPageOffsetTop(F)-document.body.scrollTop}function PopupWindow_getXYPosition(F){F=("WINDOW"==this.type?getAnchorWindowPosition:getAnchorPosition)(F);this.x=F.x,this.y=F.y}function PopupWindow_setSize(F,e){this.width=F,this.height=e}function PopupWindow_populate(F){this.contents=F,this.populated=!1}function PopupWindow_setUrl(F){this.url=F}function PopupWindow_setWindowProperties(F){this.windowProperties=F}function PopupWindow_refresh(){var F;null!=this.divName?this.use_gebi?document.getElementById(this.divName).innerHTML=this.contents:this.use_css?document.all[this.divName].innerHTML=this.contents:this.use_layers&&((F=document.layers[this.divName]).document.open(),F.document.writeln(this.contents),F.document.close()):null==this.popupWindow||this.popupWindow.closed||(""!=this.url?this.popupWindow.location.href=this.url:(this.popupWindow.document.open(),this.popupWindow.document.writeln(this.contents),this.popupWindow.document.close()),this.popupWindow.focus())}function PopupWindow_showPopup(F){var e;this.getXYPosition(F),this.x+=this.offsetX,this.y+=this.offsetY,this.populated||""==this.contents||(this.populated=!0,this.refresh()),null!=this.divName?this.use_gebi?(document.getElementById(this.divName).style.left=this.x+"px",document.getElementById(this.divName).style.top=this.y,document.getElementById(this.divName).style.visibility="visible"):this.use_css?(document.all[this.divName].style.left=this.x,document.all[this.divName].style.top=this.y,document.all[this.divName].style.visibility="visible"):this.use_layers&&(document.layers[this.divName].left=this.x,document.layers[this.divName].top=this.y,document.layers[this.divName].visibility="visible"):(null!=this.popupWindow&&!this.popupWindow.closed||(this.x<0&&(this.x=0),this.y<0&&(this.y=0),screen&&screen.availHeight&&this.y+this.height>screen.availHeight&&(this.y=screen.availHeight-this.height),screen&&screen.availWidth&&this.x+this.width>screen.availWidth&&(this.x=screen.availWidth-this.width),e=window.opera||document.layers&&!navigator.mimeTypes["*"]||"KDE"==navigator.vendor||document.childNodes&&!document.all&&!navigator.taintEnabled,this.popupWindow=window.open(e?"":"about:blank","window_"+F,this.windowProperties+",width="+this.width+",height="+this.height+",screenX="+this.x+",left="+this.x+",screenY="+this.y+",top="+this.y)),this.refresh())}function 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PopupWindow_hidePopupWindows(F){for(var e=0;e<popupWindowObjects.length;e++)null!=popupWindowObjects[e]&&popupWindowObjects[e].hideIfNotClicked(F)}function PopupWindow_attachListener(){document.layers&&document.captureEvents(Event.MOUSEUP),window.popupWindowOldEventListener=document.onmouseup,document.onmouseup=null!=window.popupWindowOldEventListener?new Function("window.popupWindowOldEventListener(); PopupWindow_hidePopupWindows();"):PopupWindow_hidePopupWindows}function PopupWindow(){window.popupWindowIndex||(window.popupWindowIndex=0),window.popupWindowObjects||(window.popupWindowObjects=new 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Color</title></head><body marginwidth=0 marginheight=0 leftmargin=0 topmargin=0><span style='text-align: center;'>"),d+="<table style='border: none;' cellspacing=0 cellpadding=0>",!(!document.getElementById&&!document.all)),r=0;r<n;r++)r%s==0&&(d+="<tr>"),t=l?'onMouseOver="'+C+"ColorPicker_highlightColor('"+o[r]+"',window.document)\"":"",d+='<td style="background-color: '+o[r]+';"><a href="javascript:void()" onclick="'+C+"ColorPicker_pickColor('"+o[r]+"',"+C+"window.popupWindowObjects["+e.index+']);return false;" '+t+">&nbsp;</a></td>",(n<=r+1||(r+1)%s==0)&&(d+="</tr>");return document.getElementById&&(d+="<tr><td colspan='"+(s=Math.floor(s/2))+"' style='background-color: #FFF;' ID='colorPickerSelectedColor'>&nbsp;</td><td colspan='"+s+"' style='text-align: center;' id='colorPickerSelectedColorValue'>#FFFFFF</td></tr>"),d+="</table>",i&&(d+="</span></body></html>"),e.populate(d+"\n"),e.offsetY=25,e.autoHide(),e}ColorPicker_targetInput=null;// ===================================================================
// Author: Matt Kruse <matt@mattkruse.com>
// WWW: http://www.mattkruse.com/
//
// NOTICE: You may use this code for any purpose, commercial or
// private, without any further permission from the author. You may
// remove this notice from your final code if you wish, however it is
// appreciated by the author if at least my web site address is kept.
//
// You may *NOT* re-distribute this code in any way except through its
// use. That means, you can include it in your product, or your web
// site, or any other form where the code is actually being used. You
// may not put the plain javascript up on your site for download or
// include it in your javascript libraries for download.
// If you wish to share this code with others, please just point them
// to the URL instead.
// Please DO NOT link directly to my .js files from your site. Copy
// the files to your server and use them there. Thank you.
// ===================================================================


/* SOURCE FILE: AnchorPosition.js */

/*
AnchorPosition.js
Author: Matt Kruse
Last modified: 10/11/02

DESCRIPTION: These functions find the position of an <A> tag in a document,
so other elements can be positioned relative to it.

COMPATABILITY: Netscape 4.x,6.x,Mozilla, IE 5.x,6.x on Windows. Some small
positioning errors - usually with Window positioning - occur on the
Macintosh platform.

FUNCTIONS:
getAnchorPosition(anchorname)
  Returns an Object() having .x and .y properties of the pixel coordinates
  of the upper-left corner of the anchor. Position is relative to the PAGE.

getAnchorWindowPosition(anchorname)
  Returns an Object() having .x and .y properties of the pixel coordinates
  of the upper-left corner of the anchor, relative to the WHOLE SCREEN.

NOTES:

1) For popping up separate browser windows, use getAnchorWindowPosition.
   Otherwise, use getAnchorPosition

2) Your anchor tag MUST contain both NAME and ID attributes which are the
   same. For example:
   <A NAME="test" ID="test"> </A>

3) There must be at least a space between <A> </A> for IE5.5 to see the
   anchor tag correctly. Do not do <A></A> with no space.
*/

// getAnchorPosition(anchorname)
//   This function returns an object having .x and .y properties which are the coordinates
//   of the named anchor, relative to the page.
function getAnchorPosition(anchorname) {
	// This function will return an Object with x and y properties
	var useWindow=false;
	var coordinates=new Object();
	var x=0,y=0;
	// Browser capability sniffing
	var use_gebi=false, use_css=false, use_layers=false;
	if (document.getElementById) { use_gebi=true; }
	else if (document.all) { use_css=true; }
	else if (document.layers) { use_layers=true; }
	// Logic to find position
 	if (use_gebi && document.all) {
		x=AnchorPosition_getPageOffsetLeft(document.all[anchorname]);
		y=AnchorPosition_getPageOffsetTop(document.all[anchorname]);
		}
	else if (use_gebi) {
		var o=document.getElementById(anchorname);
		x=AnchorPosition_getPageOffsetLeft(o);
		y=AnchorPosition_getPageOffsetTop(o);
		}
 	else if (use_css) {
		x=AnchorPosition_getPageOffsetLeft(document.all[anchorname]);
		y=AnchorPosition_getPageOffsetTop(document.all[anchorname]);
		}
	else if (use_layers) {
		var found=0;
		for (var i=0; i<document.anchors.length; i++) {
			if (document.anchors[i].name==anchorname) { found=1; break; }
			}
		if (found==0) {
			coordinates.x=0; coordinates.y=0; return coordinates;
			}
		x=document.anchors[i].x;
		y=document.anchors[i].y;
		}
	else {
		coordinates.x=0; coordinates.y=0; return coordinates;
		}
	coordinates.x=x;
	coordinates.y=y;
	return coordinates;
	}

// getAnchorWindowPosition(anchorname)
//   This function returns an object having .x and .y properties which are the coordinates
//   of the named anchor, relative to the window
function getAnchorWindowPosition(anchorname) {
	var coordinates=getAnchorPosition(anchorname);
	var x=0;
	var y=0;
	if (document.getElementById) {
		if (isNaN(window.screenX)) {
			x=coordinates.x-document.body.scrollLeft+window.screenLeft;
			y=coordinates.y-document.body.scrollTop+window.screenTop;
			}
		else {
			x=coordinates.x+window.screenX+(window.outerWidth-window.innerWidth)-window.pageXOffset;
			y=coordinates.y+window.screenY+(window.outerHeight-24-window.innerHeight)-window.pageYOffset;
			}
		}
	else if (document.all) {
		x=coordinates.x-document.body.scrollLeft+window.screenLeft;
		y=coordinates.y-document.body.scrollTop+window.screenTop;
		}
	else if (document.layers) {
		x=coordinates.x+window.screenX+(window.outerWidth-window.innerWidth)-window.pageXOffset;
		y=coordinates.y+window.screenY+(window.outerHeight-24-window.innerHeight)-window.pageYOffset;
		}
	coordinates.x=x;
	coordinates.y=y;
	return coordinates;
	}

// Functions for IE to get position of an object
function AnchorPosition_getPageOffsetLeft (el) {
	var ol=el.offsetLeft;
	while ((el=el.offsetParent) != null) { ol += el.offsetLeft; }
	return ol;
	}
function AnchorPosition_getWindowOffsetLeft (el) {
	return AnchorPosition_getPageOffsetLeft(el)-document.body.scrollLeft;
	}
function AnchorPosition_getPageOffsetTop (el) {
	var ot=el.offsetTop;
	while((el=el.offsetParent) != null) { ot += el.offsetTop; }
	return ot;
	}
function AnchorPosition_getWindowOffsetTop (el) {
	return AnchorPosition_getPageOffsetTop(el)-document.body.scrollTop;
	}

/* SOURCE FILE: PopupWindow.js */

/*
PopupWindow.js
Author: Matt Kruse
Last modified: 02/16/04

DESCRIPTION: This object allows you to easily and quickly popup a window
in a certain place. The window can either be a DIV or a separate browser
window.

COMPATABILITY: Works with Netscape 4.x, 6.x, IE 5.x on Windows. Some small
positioning errors - usually with Window positioning - occur on the
Macintosh platform. Due to bugs in Netscape 4.x, populating the popup
window with <STYLE> tags may cause errors.

USAGE:
// Create an object for a WINDOW popup
var win = new PopupWindow();

// Create an object for a DIV window using the DIV named 'mydiv'
var win = new PopupWindow('mydiv');

// Set the window to automatically hide itself when the user clicks
// anywhere else on the page except the popup
win.autoHide();

// Show the window relative to the anchor name passed in
win.showPopup(anchorname);

// Hide the popup
win.hidePopup();

// Set the size of the popup window (only applies to WINDOW popups
win.setSize(width,height);

// Populate the contents of the popup window that will be shown. If you
// change the contents while it is displayed, you will need to refresh()
win.populate(string);

// set the URL of the window, rather than populating its contents
// manually
win.setUrl("http://www.site.com/");

// Refresh the contents of the popup
win.refresh();

// Specify how many pixels to the right of the anchor the popup will appear
win.offsetX = 50;

// Specify how many pixels below the anchor the popup will appear
win.offsetY = 100;

NOTES:
1) Requires the functions in AnchorPosition.js

2) Your anchor tag MUST contain both NAME and ID attributes which are the
   same. For example:
   <A NAME="test" ID="test"> </A>

3) There must be at least a space between <A> </A> for IE5.5 to see the
   anchor tag correctly. Do not do <A></A> with no space.

4) When a PopupWindow object is created, a handler for 'onmouseup' is
   attached to any event handler you may have already defined. Do NOT define
   an event handler for 'onmouseup' after you define a PopupWindow object or
   the autoHide() will not work correctly.
*/

// Set the position of the popup window based on the anchor
function PopupWindow_getXYPosition(anchorname) {
	var coordinates;
	if (this.type == "WINDOW") {
		coordinates = getAnchorWindowPosition(anchorname);
		}
	else {
		coordinates = getAnchorPosition(anchorname);
		}
	this.x = coordinates.x;
	this.y = coordinates.y;
	}
// Set width/height of DIV/popup window
function PopupWindow_setSize(width,height) {
	this.width = width;
	this.height = height;
	}
// Fill the window with contents
function PopupWindow_populate(contents) {
	this.contents = contents;
	this.populated = false;
	}
// Set the URL to go to
function PopupWindow_setUrl(url) {
	this.url = url;
	}
// Set the window popup properties
function PopupWindow_setWindowProperties(props) {
	this.windowProperties = props;
	}
// Refresh the displayed contents of the popup
function PopupWindow_refresh() {
	if (this.divName != null) {
		// refresh the DIV object
		if (this.use_gebi) {
			document.getElementById(this.divName).innerHTML = this.contents;
			}
		else if (this.use_css) {
			document.all[this.divName].innerHTML = this.contents;
			}
		else if (this.use_layers) {
			var d = document.layers[this.divName];
			d.document.open();
			d.document.writeln(this.contents);
			d.document.close();
			}
		}
	else {
		if (this.popupWindow != null && !this.popupWindow.closed) {
			if (this.url!="") {
				this.popupWindow.location.href=this.url;
				}
			else {
				this.popupWindow.document.open();
				this.popupWindow.document.writeln(this.contents);
				this.popupWindow.document.close();
			}
			this.popupWindow.focus();
			}
		}
	}
// Position and show the popup, relative to an anchor object
function PopupWindow_showPopup(anchorname) {
	this.getXYPosition(anchorname);
	this.x += this.offsetX;
	this.y += this.offsetY;
	if (!this.populated && (this.contents != "")) {
		this.populated = true;
		this.refresh();
		}
	if (this.divName != null) {
		// Show the DIV object
		if (this.use_gebi) {
			document.getElementById(this.divName).style.left = this.x + "px";
			document.getElementById(this.divName).style.top = this.y;
			document.getElementById(this.divName).style.visibility = "visible";
			}
		else if (this.use_css) {
			document.all[this.divName].style.left = this.x;
			document.all[this.divName].style.top = this.y;
			document.all[this.divName].style.visibility = "visible";
			}
		else if (this.use_layers) {
			document.layers[this.divName].left = this.x;
			document.layers[this.divName].top = this.y;
			document.layers[this.divName].visibility = "visible";
			}
		}
	else {
		if (this.popupWindow == null || this.popupWindow.closed) {
			// If the popup window will go off-screen, move it so it doesn't
			if (this.x<0) { this.x=0; }
			if (this.y<0) { this.y=0; }
			if (screen && screen.availHeight) {
				if ((this.y + this.height) > screen.availHeight) {
					this.y = screen.availHeight - this.height;
					}
				}
			if (screen && screen.availWidth) {
				if ((this.x + this.width) > screen.availWidth) {
					this.x = screen.availWidth - this.width;
					}
				}
			var avoidAboutBlank = window.opera || ( document.layers && !navigator.mimeTypes['*'] ) || navigator.vendor == 'KDE' || ( document.childNodes && !document.all && !navigator.taintEnabled );
			this.popupWindow = window.open(avoidAboutBlank?"":"about:blank","window_"+anchorname,this.windowProperties+",width="+this.width+",height="+this.height+",screenX="+this.x+",left="+this.x+",screenY="+this.y+",top="+this.y+"");
			}
		this.refresh();
		}
	}
// Hide the popup
function PopupWindow_hidePopup() {
	if (this.divName != null) {
		if (this.use_gebi) {
			document.getElementById(this.divName).style.visibility = "hidden";
			}
		else if (this.use_css) {
			document.all[this.divName].style.visibility = "hidden";
			}
		else if (this.use_layers) {
			document.layers[this.divName].visibility = "hidden";
			}
		}
	else {
		if (this.popupWindow && !this.popupWindow.closed) {
			this.popupWindow.close();
			this.popupWindow = null;
			}
		}
	}
// Pass an event and return whether or not it was the popup DIV that was clicked
function PopupWindow_isClicked(e) {
	if (this.divName != null) {
		if (this.use_layers) {
			var clickX = e.pageX;
			var clickY = e.pageY;
			var t = document.layers[this.divName];
			if ((clickX > t.left) && (clickX < t.left+t.clip.width) && (clickY > t.top) && (clickY < t.top+t.clip.height)) {
				return true;
				}
			else { return false; }
			}
		else if (document.all) { // Need to hard-code this to trap IE for error-handling
			var t = window.event.srcElement;
			while (t.parentElement != null) {
				if (t.id==this.divName) {
					return true;
					}
				t = t.parentElement;
				}
			return false;
			}
		else if (this.use_gebi && e) {
			var t = e.originalTarget;
			while (t.parentNode != null) {
				if (t.id==this.divName) {
					return true;
					}
				t = t.parentNode;
				}
			return false;
			}
		return false;
		}
	return false;
	}

// Check an onMouseDown event to see if we should hide
function PopupWindow_hideIfNotClicked(e) {
	if (this.autoHideEnabled && !this.isClicked(e)) {
		this.hidePopup();
		}
	}
// Call this to make the DIV disable automatically when mouse is clicked outside it
function PopupWindow_autoHide() {
	this.autoHideEnabled = true;
	}
// This global function checks all PopupWindow objects onmouseup to see if they should be hidden
function PopupWindow_hidePopupWindows(e) {
	for (var i=0; i<popupWindowObjects.length; i++) {
		if (popupWindowObjects[i] != null) {
			var p = popupWindowObjects[i];
			p.hideIfNotClicked(e);
			}
		}
	}
// Run this immediately to attach the event listener
function PopupWindow_attachListener() {
	if (document.layers) {
		document.captureEvents(Event.MOUSEUP);
		}
	window.popupWindowOldEventListener = document.onmouseup;
	if (window.popupWindowOldEventListener != null) {
		document.onmouseup = new Function("window.popupWindowOldEventListener(); PopupWindow_hidePopupWindows();");
		}
	else {
		document.onmouseup = PopupWindow_hidePopupWindows;
		}
	}
// CONSTRUCTOR for the PopupWindow object
// Pass it a DIV name to use a DHTML popup, otherwise will default to window popup
function PopupWindow() {
	if (!window.popupWindowIndex) { window.popupWindowIndex = 0; }
	if (!window.popupWindowObjects) { window.popupWindowObjects = new Array(); }
	if (!window.listenerAttached) {
		window.listenerAttached = true;
		PopupWindow_attachListener();
		}
	this.index = popupWindowIndex++;
	popupWindowObjects[this.index] = this;
	this.divName = null;
	this.popupWindow = null;
	this.width=0;
	this.height=0;
	this.populated = false;
	this.visible = false;
	this.autoHideEnabled = false;

	this.contents = "";
	this.url="";
	this.windowProperties="toolbar=no,location=no,status=no,menubar=no,scrollbars=auto,resizable,alwaysRaised,dependent,titlebar=no";
	if (arguments.length>0) {
		this.type="DIV";
		this.divName = arguments[0];
		}
	else {
		this.type="WINDOW";
		}
	this.use_gebi = false;
	this.use_css = false;
	this.use_layers = false;
	if (document.getElementById) { this.use_gebi = true; }
	else if (document.all) { this.use_css = true; }
	else if (document.layers) { this.use_layers = true; }
	else { this.type = "WINDOW"; }
	this.offsetX = 0;
	this.offsetY = 0;
	// Method mappings
	this.getXYPosition = PopupWindow_getXYPosition;
	this.populate = PopupWindow_populate;
	this.setUrl = PopupWindow_setUrl;
	this.setWindowProperties = PopupWindow_setWindowProperties;
	this.refresh = PopupWindow_refresh;
	this.showPopup = PopupWindow_showPopup;
	this.hidePopup = PopupWindow_hidePopup;
	this.setSize = PopupWindow_setSize;
	this.isClicked = PopupWindow_isClicked;
	this.autoHide = PopupWindow_autoHide;
	this.hideIfNotClicked = PopupWindow_hideIfNotClicked;
	}

/* SOURCE FILE: ColorPicker2.js */

/*
Last modified: 02/24/2003

DESCRIPTION: This widget is used to select a color, in hexadecimal #RRGGBB
form. It uses a color "swatch" to display the standard 216-color web-safe
palette. The user can then click on a color to select it.

COMPATABILITY: See notes in AnchorPosition.js and PopupWindow.js.
Only the latest DHTML-capable browsers will show the color and hex values
at the bottom as your mouse goes over them.

USAGE:
// Create a new ColorPicker object using DHTML popup
var cp = new ColorPicker();

// Create a new ColorPicker object using Window Popup
var cp = new ColorPicker('window');

// Add a link in your page to trigger the popup. For example:
<A HREF="#" onClick="cp.show('pick');return false;" NAME="pick" ID="pick">Pick</A>

// Or use the built-in "select" function to do the dirty work for you:
<A HREF="#" onClick="cp.select(document.forms[0].color,'pick');return false;" NAME="pick" ID="pick">Pick</A>

// If using DHTML popup, write out the required DIV tag near the bottom
// of your page.
<SCRIPT LANGUAGE="JavaScript">cp.writeDiv()</SCRIPT>

// Write the 'pickColor' function that will be called when the user clicks
// a color and do something with the value. This is only required if you
// want to do something other than simply populate a form field, which is
// what the 'select' function will give you.
function pickColor(color) {
	field.value = color;
	}

NOTES:
1) Requires the functions in AnchorPosition.js and PopupWindow.js

2) Your anchor tag MUST contain both NAME and ID attributes which are the
   same. For example:
   <A NAME="test" ID="test"> </A>

3) There must be at least a space between <A> </A> for IE5.5 to see the
   anchor tag correctly. Do not do <A></A> with no space.

4) When a ColorPicker object is created, a handler for 'onmouseup' is
   attached to any event handler you may have already defined. Do NOT define
   an event handler for 'onmouseup' after you define a ColorPicker object or
   the color picker will not hide itself correctly.
*/
ColorPicker_targetInput = null;
function ColorPicker_writeDiv() {
	document.writeln("<DIV ID=\"colorPickerDiv\" STYLE=\"position:absolute;visibility:hidden;\"> </DIV>");
	}

function ColorPicker_show(anchorname) {
	this.showPopup(anchorname);
	}

function ColorPicker_pickColor(color,obj) {
	obj.hidePopup();
	pickColor(color);
	}

// A Default "pickColor" function to accept the color passed back from popup.
// User can over-ride this with their own function.
function pickColor(color) {
	if (ColorPicker_targetInput==null) {
		alert("Target Input is null, which means you either didn't use the 'select' function or you have no defined your own 'pickColor' function to handle the picked color!");
		return;
		}
	ColorPicker_targetInput.value = color;
	}

// This function is the easiest way to popup the window, select a color, and
// have the value populate a form field, which is what most people want to do.
function ColorPicker_select(inputobj,linkname) {
	if (inputobj.type!="text" && inputobj.type!="hidden" && inputobj.type!="textarea") {
		alert("colorpicker.select: Input object passed is not a valid form input object");
		window.ColorPicker_targetInput=null;
		return;
		}
	window.ColorPicker_targetInput = inputobj;
	this.show(linkname);
	}

// This function runs when you move your mouse over a color block, if you have a newer browser
function ColorPicker_highlightColor(c) {
	var thedoc = (arguments.length>1)?arguments[1]:window.document;
	var d = thedoc.getElementById("colorPickerSelectedColor");
	d.style.backgroundColor = c;
	d = thedoc.getElementById("colorPickerSelectedColorValue");
	d.innerHTML = c;
	}

function ColorPicker() {
	var windowMode = false;
	// Create a new PopupWindow object
	if (arguments.length==0) {
		var divname = "colorPickerDiv";
		}
	else if (arguments[0] == "window") {
		var divname = '';
		windowMode = true;
		}
	else {
		var divname = arguments[0];
		}

	if (divname != "") {
		var cp = new PopupWindow(divname);
		}
	else {
		var cp = new PopupWindow();
		cp.setSize(225,250);
		}

	// Object variables
	cp.currentValue = "#FFFFFF";

	// Method Mappings
	cp.writeDiv = ColorPicker_writeDiv;
	cp.highlightColor = ColorPicker_highlightColor;
	cp.show = ColorPicker_show;
	cp.select = ColorPicker_select;

	// Code to populate color picker window
	var colors = new Array(	"#4180B6","#69AEE7","#000000","#000033","#000066","#000099","#0000CC","#0000FF","#330000","#330033","#330066","#330099",
							"#3300CC","#3300FF","#660000","#660033","#660066","#660099","#6600CC","#6600FF","#990000","#990033","#990066","#990099",
							"#9900CC","#9900FF","#CC0000","#CC0033","#CC0066","#CC0099","#CC00CC","#CC00FF","#FF0000","#FF0033","#FF0066","#FF0099",
							"#FF00CC","#FF00FF","#7FFFFF","#7FFFFF","#7FF7F7","#7FEFEF","#7FE7E7","#7FDFDF","#7FD7D7","#7FCFCF","#7FC7C7","#7FBFBF",
							"#7FB7B7","#7FAFAF","#7FA7A7","#7F9F9F","#7F9797","#7F8F8F","#7F8787","#7F7F7F","#7F7777","#7F6F6F","#7F6767","#7F5F5F",
							"#7F5757","#7F4F4F","#7F4747","#7F3F3F","#7F3737","#7F2F2F","#7F2727","#7F1F1F","#7F1717","#7F0F0F","#7F0707","#7F0000",

							"#4180B6","#69AEE7","#003300","#003333","#003366","#003399","#0033CC","#0033FF","#333300","#333333","#333366","#333399",
							"#3333CC","#3333FF","#663300","#663333","#663366","#663399","#6633CC","#6633FF","#993300","#993333","#993366","#993399",
							"#9933CC","#9933FF","#CC3300","#CC3333","#CC3366","#CC3399","#CC33CC","#CC33FF","#FF3300","#FF3333","#FF3366","#FF3399",
							"#FF33CC","#FF33FF","#FF7FFF","#FF7FFF","#F77FF7","#EF7FEF","#E77FE7","#DF7FDF","#D77FD7","#CF7FCF","#C77FC7","#BF7FBF",
							"#B77FB7","#AF7FAF","#A77FA7","#9F7F9F","#977F97","#8F7F8F","#877F87","#7F7F7F","#777F77","#6F7F6F","#677F67","#5F7F5F",
							"#577F57","#4F7F4F","#477F47","#3F7F3F","#377F37","#2F7F2F","#277F27","#1F7F1F","#177F17","#0F7F0F","#077F07","#007F00",

							"#4180B6","#69AEE7","#006600","#006633","#006666","#006699","#0066CC","#0066FF","#336600","#336633","#336666","#336699",
							"#3366CC","#3366FF","#666600","#666633","#666666","#666699","#6666CC","#6666FF","#996600","#996633","#996666","#996699",
							"#9966CC","#9966FF","#CC6600","#CC6633","#CC6666","#CC6699","#CC66CC","#CC66FF","#FF6600","#FF6633","#FF6666","#FF6699",
							"#FF66CC","#FF66FF","#FFFF7F","#FFFF7F","#F7F77F","#EFEF7F","#E7E77F","#DFDF7F","#D7D77F","#CFCF7F","#C7C77F","#BFBF7F",
							"#B7B77F","#AFAF7F","#A7A77F","#9F9F7F","#97977F","#8F8F7F","#87877F","#7F7F7F","#77777F","#6F6F7F","#67677F","#5F5F7F",
							"#57577F","#4F4F7F","#47477F","#3F3F7F","#37377F","#2F2F7F","#27277F","#1F1F7F","#17177F","#0F0F7F","#07077F","#00007F",

							"#4180B6","#69AEE7","#009900","#009933","#009966","#009999","#0099CC","#0099FF","#339900","#339933","#339966","#339999",
							"#3399CC","#3399FF","#669900","#669933","#669966","#669999","#6699CC","#6699FF","#999900","#999933","#999966","#999999",
							"#9999CC","#9999FF","#CC9900","#CC9933","#CC9966","#CC9999","#CC99CC","#CC99FF","#FF9900","#FF9933","#FF9966","#FF9999",
							"#FF99CC","#FF99FF","#3FFFFF","#3FFFFF","#3FF7F7","#3FEFEF","#3FE7E7","#3FDFDF","#3FD7D7","#3FCFCF","#3FC7C7","#3FBFBF",
							"#3FB7B7","#3FAFAF","#3FA7A7","#3F9F9F","#3F9797","#3F8F8F","#3F8787","#3F7F7F","#3F7777","#3F6F6F","#3F6767","#3F5F5F",
							"#3F5757","#3F4F4F","#3F4747","#3F3F3F","#3F3737","#3F2F2F","#3F2727","#3F1F1F","#3F1717","#3F0F0F","#3F0707","#3F0000",

							"#4180B6","#69AEE7","#00CC00","#00CC33","#00CC66","#00CC99","#00CCCC","#00CCFF","#33CC00","#33CC33","#33CC66","#33CC99",
							"#33CCCC","#33CCFF","#66CC00","#66CC33","#66CC66","#66CC99","#66CCCC","#66CCFF","#99CC00","#99CC33","#99CC66","#99CC99",
							"#99CCCC","#99CCFF","#CCCC00","#CCCC33","#CCCC66","#CCCC99","#CCCCCC","#CCCCFF","#FFCC00","#FFCC33","#FFCC66","#FFCC99",
							"#FFCCCC","#FFCCFF","#FF3FFF","#FF3FFF","#F73FF7","#EF3FEF","#E73FE7","#DF3FDF","#D73FD7","#CF3FCF","#C73FC7","#BF3FBF",
							"#B73FB7","#AF3FAF","#A73FA7","#9F3F9F","#973F97","#8F3F8F","#873F87","#7F3F7F","#773F77","#6F3F6F","#673F67","#5F3F5F",
							"#573F57","#4F3F4F","#473F47","#3F3F3F","#373F37","#2F3F2F","#273F27","#1F3F1F","#173F17","#0F3F0F","#073F07","#003F00",

							"#4180B6","#69AEE7","#00FF00","#00FF33","#00FF66","#00FF99","#00FFCC","#00FFFF","#33FF00","#33FF33","#33FF66","#33FF99",
							"#33FFCC","#33FFFF","#66FF00","#66FF33","#66FF66","#66FF99","#66FFCC","#66FFFF","#99FF00","#99FF33","#99FF66","#99FF99",
							"#99FFCC","#99FFFF","#CCFF00","#CCFF33","#CCFF66","#CCFF99","#CCFFCC","#CCFFFF","#FFFF00","#FFFF33","#FFFF66","#FFFF99",
							"#FFFFCC","#FFFFFF","#FFFF3F","#FFFF3F","#F7F73F","#EFEF3F","#E7E73F","#DFDF3F","#D7D73F","#CFCF3F","#C7C73F","#BFBF3F",
							"#B7B73F","#AFAF3F","#A7A73F","#9F9F3F","#97973F","#8F8F3F","#87873F","#7F7F3F","#77773F","#6F6F3F","#67673F","#5F5F3F",
							"#57573F","#4F4F3F","#47473F","#3F3F3F","#37373F","#2F2F3F","#27273F","#1F1F3F","#17173F","#0F0F3F","#07073F","#00003F",

							"#4180B6","#69AEE7","#FFFFFF","#FFEEEE","#FFDDDD","#FFCCCC","#FFBBBB","#FFAAAA","#FF9999","#FF8888","#FF7777","#FF6666",
							"#FF5555","#FF4444","#FF3333","#FF2222","#FF1111","#FF0000","#FF0000","#FF0000","#FF0000","#EE0000","#DD0000","#CC0000",
							"#BB0000","#AA0000","#990000","#880000","#770000","#660000","#550000","#440000","#330000","#220000","#110000","#000000",
							"#000000","#000000","#000000","#001111","#002222","#003333","#004444","#005555","#006666","#007777","#008888","#009999",
							"#00AAAA","#00BBBB","#00CCCC","#00DDDD","#00EEEE","#00FFFF","#00FFFF","#00FFFF","#00FFFF","#11FFFF","#22FFFF","#33FFFF",
							"#44FFFF","#55FFFF","#66FFFF","#77FFFF","#88FFFF","#99FFFF","#AAFFFF","#BBFFFF","#CCFFFF","#DDFFFF","#EEFFFF","#FFFFFF",

							"#4180B6","#69AEE7","#FFFFFF","#EEFFEE","#DDFFDD","#CCFFCC","#BBFFBB","#AAFFAA","#99FF99","#88FF88","#77FF77","#66FF66",
							"#55FF55","#44FF44","#33FF33","#22FF22","#11FF11","#00FF00","#00FF00","#00FF00","#00FF00","#00EE00","#00DD00","#00CC00",
							"#00BB00","#00AA00","#009900","#008800","#007700","#006600","#005500","#004400","#003300","#002200","#001100","#000000",
							"#000000","#000000","#000000","#110011","#220022","#330033","#440044","#550055","#660066","#770077","#880088","#990099",
							"#AA00AA","#BB00BB","#CC00CC","#DD00DD","#EE00EE","#FF00FF","#FF00FF","#FF00FF","#FF00FF","#FF11FF","#FF22FF","#FF33FF",
							"#FF44FF","#FF55FF","#FF66FF","#FF77FF","#FF88FF","#FF99FF","#FFAAFF","#FFBBFF","#FFCCFF","#FFDDFF","#FFEEFF","#FFFFFF",

							"#4180B6","#69AEE7","#FFFFFF","#EEEEFF","#DDDDFF","#CCCCFF","#BBBBFF","#AAAAFF","#9999FF","#8888FF","#7777FF","#6666FF",
							"#5555FF","#4444FF","#3333FF","#2222FF","#1111FF","#0000FF","#0000FF","#0000FF","#0000FF","#0000EE","#0000DD","#0000CC",
							"#0000BB","#0000AA","#000099","#000088","#000077","#000066","#000055","#000044","#000033","#000022","#000011","#000000",
							"#000000","#000000","#000000","#111100","#222200","#333300","#444400","#555500","#666600","#777700","#888800","#999900",
							"#AAAA00","#BBBB00","#CCCC00","#DDDD00","#EEEE00","#FFFF00","#FFFF00","#FFFF00","#FFFF00","#FFFF11","#FFFF22","#FFFF33",
							"#FFFF44","#FFFF55","#FFFF66","#FFFF77","#FFFF88","#FFFF99","#FFFFAA","#FFFFBB","#FFFFCC","#FFFFDD","#FFFFEE","#FFFFFF",

							"#4180B6","#69AEE7","#FFFFFF","#FFFFFF","#FBFBFB","#F7F7F7","#F3F3F3","#EFEFEF","#EBEBEB","#E7E7E7","#E3E3E3","#DFDFDF",
							"#DBDBDB","#D7D7D7","#D3D3D3","#CFCFCF","#CBCBCB","#C7C7C7","#C3C3C3","#BFBFBF","#BBBBBB","#B7B7B7","#B3B3B3","#AFAFAF",
							"#ABABAB","#A7A7A7","#A3A3A3","#9F9F9F","#9B9B9B","#979797","#939393","#8F8F8F","#8B8B8B","#878787","#838383","#7F7F7F",
							"#7B7B7B","#777777","#737373","#6F6F6F","#6B6B6B","#676767","#636363","#5F5F5F","#5B5B5B","#575757","#535353","#4F4F4F",
							"#4B4B4B","#474747","#434343","#3F3F3F","#3B3B3B","#373737","#333333","#2F2F2F","#2B2B2B","#272727","#232323","#1F1F1F",
							"#1B1B1B","#171717","#131313","#0F0F0F","#0B0B0B","#070707","#030303","#000000","#000000","#000000","#000000","#000000");
	var total = colors.length;
	var width = 72;
	var cp_contents = "";
	var windowRef = (windowMode)?"window.opener.":"";
	if (windowMode) {
		cp_contents += "<html><head><title>Select Color</title></head>";
		cp_contents += "<body marginwidth=0 marginheight=0 leftmargin=0 topmargin=0><span style='text-align: center;'>";
		}
	cp_contents += "<table style='border: none;' cellspacing=0 cellpadding=0>";
	var use_highlight = (document.getElementById || document.all)?true:false;
	for (var i=0; i<total; i++) {
		if ((i % width) == 0) { cp_contents += "<tr>"; }
		if (use_highlight) { var mo = 'onMouseOver="'+windowRef+'ColorPicker_highlightColor(\''+colors[i]+'\',window.document)"'; }
		else { mo = ""; }
		cp_contents += '<td style="background-color: '+colors[i]+';"><a href="javascript:void()" onclick="'+windowRef+'ColorPicker_pickColor(\''+colors[i]+'\','+windowRef+'window.popupWindowObjects['+cp.index+']);return false;" '+mo+'>&nbsp;</a></td>';
		if ( ((i+1)>=total) || (((i+1) % width) == 0)) {
			cp_contents += "</tr>";
			}
		}
	// If the browser supports dynamically changing TD cells, add the fancy stuff
	if (document.getElementById) {
		var width1 = Math.floor(width/2);
		var width2 = width = width1;
		cp_contents += "<tr><td colspan='"+width1+"' style='background-color: #FFF;' ID='colorPickerSelectedColor'>&nbsp;</td><td colspan='"+width2+"' style='text-align: center;' id='colorPickerSelectedColorValue'>#FFFFFF</td></tr>";
		}
	cp_contents += "</table>";
	if (windowMode) {
		cp_contents += "</span></body></html>";
		}
	// end populate code

	// Write the contents to the popup object
	cp.populate(cp_contents+"\n");
	// Move the table down a bit so you can see it
	cp.offsetY = 25;
	cp.autoHide();
	return cp;
	}
/**
 * @output wp-includes/js/wp-sanitize.js
 */

/* eslint-env es6 */

( function () {

	window.wp = window.wp || {};

	/**
	 * wp.sanitize
	 *
	 * Helper functions to sanitize strings.
	 */
	wp.sanitize = {

		/**
		 * Strip HTML tags.
		 *
		 * @param {string} text - Text to strip the HTML tags from.
		 *
		 * @return {string} Stripped text.
		 */
		stripTags: function( text ) {
			let _text = text || '';

			// Do the search-replace until there is nothing to be replaced.
			do {
				// Keep pre-replace text for comparison.
				text = _text;

				// Do the replacement.
				_text = text
					.replace( /<!--[\s\S]*?(-->|$)/g, '' )
					.replace( /<(script|style)[^>]*>[\s\S]*?(<\/\1>|$)/ig, '' )
					.replace( /<\/?[a-z][\s\S]*?(>|$)/ig, '' );
			} while ( _text !== text );

			// Return the text with stripped tags.
			return _text;
		},

		/**
		 * Strip HTML tags and convert HTML entities.
		 *
		 * @param {string} text - Text to strip tags and convert HTML entities.
		 *
		 * @return {string} Sanitized text.
		 */
		stripTagsAndEncodeText: function( text ) {
			let _text = wp.sanitize.stripTags( text ),
				textarea = document.createElement( 'textarea' );

			try {
				textarea.textContent = _text;
				_text = wp.sanitize.stripTags( textarea.value );
			} catch ( er ) {}

			return _text;
		}
	};
}() );
/**
 * @output wp-includes/js/media-editor.js
 */

/* global getUserSetting, tinymce, QTags */

// WordPress, TinyMCE, and Media
// -----------------------------
(function($, _){
	/**
	 * Stores the editors' `wp.media.controller.Frame` instances.
	 *
	 * @static
	 */
	var workflows = {};

	/**
	 * A helper mixin function to avoid truthy and falsey values being
	 *   passed as an input that expects booleans. If key is undefined in the map,
	 *   but has a default value, set it.
	 *
	 * @param {Object} attrs Map of props from a shortcode or settings.
	 * @param {string} key The key within the passed map to check for a value.
	 * @return {mixed|undefined} The original or coerced value of key within attrs.
	 */
	wp.media.coerce = function ( attrs, key ) {
		if ( _.isUndefined( attrs[ key ] ) && ! _.isUndefined( this.defaults[ key ] ) ) {
			attrs[ key ] = this.defaults[ key ];
		} else if ( 'true' === attrs[ key ] ) {
			attrs[ key ] = true;
		} else if ( 'false' === attrs[ key ] ) {
			attrs[ key ] = false;
		}
		return attrs[ key ];
	};

	/** @namespace wp.media.string */
	wp.media.string = {
		/**
		 * Joins the `props` and `attachment` objects,
		 * outputting the proper object format based on the
		 * attachment's type.
		 *
		 * @param {Object} [props={}] Attachment details (align, link, size, etc).
		 * @param {Object} attachment The attachment object, media version of Post.
		 * @return {Object} Joined props
		 */
		props: function( props, attachment ) {
			var link, linkUrl, size, sizes,
				defaultProps = wp.media.view.settings.defaultProps;

			props = props ? _.clone( props ) : {};

			if ( attachment && attachment.type ) {
				props.type = attachment.type;
			}

			if ( 'image' === props.type ) {
				props = _.defaults( props || {}, {
					align:   defaultProps.align || getUserSetting( 'align', 'none' ),
					size:    defaultProps.size  || getUserSetting( 'imgsize', 'medium' ),
					url:     '',
					classes: []
				});
			}

			// All attachment-specific settings follow.
			if ( ! attachment ) {
				return props;
			}

			props.title = props.title || attachment.title;

			link = props.link || defaultProps.link || getUserSetting( 'urlbutton', 'file' );
			if ( 'file' === link || 'embed' === link ) {
				linkUrl = attachment.url;
			} else if ( 'post' === link ) {
				linkUrl = attachment.link;
			} else if ( 'custom' === link ) {
				linkUrl = props.linkUrl;
			}
			props.linkUrl = linkUrl || '';

			// Format properties for images.
			if ( 'image' === attachment.type ) {
				props.classes.push( 'wp-image-' + attachment.id );

				sizes = attachment.sizes;
				size = sizes && sizes[ props.size ] ? sizes[ props.size ] : attachment;

				_.extend( props, _.pick( attachment, 'align', 'caption', 'alt' ), {
					width:     size.width,
					height:    size.height,
					src:       size.url,
					captionId: 'attachment_' + attachment.id
				});
			} else if ( 'video' === attachment.type || 'audio' === attachment.type ) {
				_.extend( props, _.pick( attachment, 'title', 'type', 'icon', 'mime' ) );
			// Format properties for non-images.
			} else {
				props.title = props.title || attachment.filename;
				props.rel = props.rel || 'attachment wp-att-' + attachment.id;
			}

			return props;
		},
		/**
		 * Create link markup that is suitable for passing to the editor
		 *
		 * @param {Object} props Attachment details (align, link, size, etc).
		 * @param {Object} attachment The attachment object, media version of Post.
		 * @return {string} The link markup
		 */
		link: function( props, attachment ) {
			var options;

			props = wp.media.string.props( props, attachment );

			options = {
				tag:     'a',
				content: props.title,
				attrs:   {
					href: props.linkUrl
				}
			};

			if ( props.rel ) {
				options.attrs.rel = props.rel;
			}

			return wp.html.string( options );
		},
		/**
		 * Create an Audio shortcode string that is suitable for passing to the editor
		 *
		 * @param {Object} props Attachment details (align, link, size, etc).
		 * @param {Object} attachment The attachment object, media version of Post.
		 * @return {string} The audio shortcode
		 */
		audio: function( props, attachment ) {
			return wp.media.string._audioVideo( 'audio', props, attachment );
		},
		/**
		 * Create a Video shortcode string that is suitable for passing to the editor
		 *
		 * @param {Object} props Attachment details (align, link, size, etc).
		 * @param {Object} attachment The attachment object, media version of Post.
		 * @return {string} The video shortcode
		 */
		video: function( props, attachment ) {
			return wp.media.string._audioVideo( 'video', props, attachment );
		},
		/**
		 * Helper function to create a media shortcode string
		 *
		 * @access private
		 *
		 * @param {string} type The shortcode tag name: 'audio' or 'video'.
		 * @param {Object} props Attachment details (align, link, size, etc).
		 * @param {Object} attachment The attachment object, media version of Post.
		 * @return {string} The media shortcode
		 */
		_audioVideo: function( type, props, attachment ) {
			var shortcode, html, extension;

			props = wp.media.string.props( props, attachment );
			if ( props.link !== 'embed' ) {
				return wp.media.string.link( props );
			}

			shortcode = {};

			if ( 'video' === type ) {
				if ( attachment.image && -1 === attachment.image.src.indexOf( attachment.icon ) ) {
					shortcode.poster = attachment.image.src;
				}

				if ( attachment.width ) {
					shortcode.width = attachment.width;
				}

				if ( attachment.height ) {
					shortcode.height = attachment.height;
				}
			}

			extension = attachment.filename.split('.').pop();

			if ( _.contains( wp.media.view.settings.embedExts, extension ) ) {
				shortcode[extension] = attachment.url;
			} else {
				// Render unsupported audio and video files as links.
				return wp.media.string.link( props );
			}

			html = wp.shortcode.string({
				tag:     type,
				attrs:   shortcode
			});

			return html;
		},
		/**
		 * Create image markup, optionally with a link and/or wrapped in a caption shortcode,
		 *  that is suitable for passing to the editor
		 *
		 * @param {Object} props Attachment details (align, link, size, etc).
		 * @param {Object} attachment The attachment object, media version of Post.
		 * @return {string}
		 */
		image: function( props, attachment ) {
			var img = {},
				options, classes, shortcode, html;

			props.type = 'image';
			props = wp.media.string.props( props, attachment );
			classes = props.classes || [];

			img.src = ! _.isUndefined( attachment ) ? attachment.url : props.url;
			_.extend( img, _.pick( props, 'width', 'height', 'alt' ) );

			// Only assign the align class to the image if we're not printing
			// a caption, since the alignment is sent to the shortcode.
			if ( props.align && ! props.caption ) {
				classes.push( 'align' + props.align );
			}

			if ( props.size ) {
				classes.push( 'size-' + props.size );
			}

			img['class'] = _.compact( classes ).join(' ');

			// Generate `img` tag options.
			options = {
				tag:    'img',
				attrs:  img,
				single: true
			};

			// Generate the `a` element options, if they exist.
			if ( props.linkUrl ) {
				options = {
					tag:   'a',
					attrs: {
						href: props.linkUrl
					},
					content: options
				};
			}

			html = wp.html.string( options );

			// Generate the caption shortcode.
			if ( props.caption ) {
				shortcode = {};

				if ( img.width ) {
					shortcode.width = img.width;
				}

				if ( props.captionId ) {
					shortcode.id = props.captionId;
				}

				if ( props.align ) {
					shortcode.align = 'align' + props.align;
				}

				html = wp.shortcode.string({
					tag:     'caption',
					attrs:   shortcode,
					content: html + ' ' + props.caption
				});
			}

			return html;
		}
	};

	wp.media.embed = {
		coerce : wp.media.coerce,

		defaults : {
			url : '',
			width: '',
			height: ''
		},

		edit : function( data, isURL ) {
			var frame, props = {}, shortcode;

			if ( isURL ) {
				props.url = data.replace(/<[^>]+>/g, '');
			} else {
				shortcode = wp.shortcode.next( 'embed', data ).shortcode;

				props = _.defaults( shortcode.attrs.named, this.defaults );
				if ( shortcode.content ) {
					props.url = shortcode.content;
				}
			}

			frame = wp.media({
				frame: 'post',
				state: 'embed',
				metadata: props
			});

			return frame;
		},

		shortcode : function( model ) {
			var self = this, content;

			_.each( this.defaults, function( value, key ) {
				model[ key ] = self.coerce( model, key );

				if ( value === model[ key ] ) {
					delete model[ key ];
				}
			});

			content = model.url;
			delete model.url;

			return new wp.shortcode({
				tag: 'embed',
				attrs: model,
				content: content
			});
		}
	};

	/**
	 * @class wp.media.collection
	 *
	 * @param {Object} attributes
	 */
	wp.media.collection = function(attributes) {
		var collections = {};

		return _.extend(/** @lends wp.media.collection.prototype */{
			coerce : wp.media.coerce,
			/**
			 * Retrieve attachments based on the properties of the passed shortcode
			 *
			 * @param {wp.shortcode} shortcode An instance of wp.shortcode().
			 * @return {wp.media.model.Attachments} A Backbone.Collection containing
			 *                                      the media items belonging to a collection.
			 *                                      The query[ this.tag ] property is a Backbone.Model
			 *                                      containing the 'props' for the collection.
			 */
			attachments: function( shortcode ) {
				var shortcodeString = shortcode.string(),
					result = collections[ shortcodeString ],
					attrs, args, query, others, self = this;

				delete collections[ shortcodeString ];
				if ( result ) {
					return result;
				}
				// Fill the default shortcode attributes.
				attrs = _.defaults( shortcode.attrs.named, this.defaults );
				args  = _.pick( attrs, 'orderby', 'order' );

				args.type    = this.type;
				args.perPage = -1;

				// Mark the `orderby` override attribute.
				if ( undefined !== attrs.orderby ) {
					attrs._orderByField = attrs.orderby;
				}

				if ( 'rand' === attrs.orderby ) {
					attrs._orderbyRandom = true;
				}

				// Map the `orderby` attribute to the corresponding model property.
				if ( ! attrs.orderby || /^menu_order(?: ID)?$/i.test( attrs.orderby ) ) {
					args.orderby = 'menuOrder';
				}

				// Map the `ids` param to the correct query args.
				if ( attrs.ids ) {
					args.post__in = attrs.ids.split(',');
					args.orderby  = 'post__in';
				} else if ( attrs.include ) {
					args.post__in = attrs.include.split(',');
				}

				if ( attrs.exclude ) {
					args.post__not_in = attrs.exclude.split(',');
				}

				if ( ! args.post__in ) {
					args.uploadedTo = attrs.id;
				}

				// Collect the attributes that were not included in `args`.
				others = _.omit( attrs, 'id', 'ids', 'include', 'exclude', 'orderby', 'order' );

				_.each( this.defaults, function( value, key ) {
					others[ key ] = self.coerce( others, key );
				});

				query = wp.media.query( args );
				query[ this.tag ] = new Backbone.Model( others );
				return query;
			},
			/**
			 * Triggered when clicking 'Insert {label}' or 'Update {label}'
			 *
			 * @param {wp.media.model.Attachments} attachments A Backbone.Collection containing
			 *      the media items belonging to a collection.
			 *      The query[ this.tag ] property is a Backbone.Model
			 *          containing the 'props' for the collection.
			 * @return {wp.shortcode}
			 */
			shortcode: function( attachments ) {
				var props = attachments.props.toJSON(),
					attrs = _.pick( props, 'orderby', 'order' ),
					shortcode, clone;

				if ( attachments.type ) {
					attrs.type = attachments.type;
					delete attachments.type;
				}

				if ( attachments[this.tag] ) {
					_.extend( attrs, attachments[this.tag].toJSON() );
				}

				/*
				 * Convert all gallery shortcodes to use the `ids` property.
				 * Ignore `post__in` and `post__not_in`; the attachments in
				 * the collection will already reflect those properties.
				 */
				attrs.ids = attachments.pluck('id');

				// Copy the `uploadedTo` post ID.
				if ( props.uploadedTo ) {
					attrs.id = props.uploadedTo;
				}
				// Check if the gallery is randomly ordered.
				delete attrs.orderby;

				if ( attrs._orderbyRandom ) {
					attrs.orderby = 'rand';
				} else if ( attrs._orderByField && 'rand' !== attrs._orderByField ) {
					attrs.orderby = attrs._orderByField;
				}

				delete attrs._orderbyRandom;
				delete attrs._orderByField;

				// If the `ids` attribute is set and `orderby` attribute
				// is the default value, clear it for cleaner output.
				if ( attrs.ids && 'post__in' === attrs.orderby ) {
					delete attrs.orderby;
				}

				attrs = this.setDefaults( attrs );

				shortcode = new wp.shortcode({
					tag:    this.tag,
					attrs:  attrs,
					type:   'single'
				});

				// Use a cloned version of the gallery.
				clone = new wp.media.model.Attachments( attachments.models, {
					props: props
				});
				clone[ this.tag ] = attachments[ this.tag ];
				collections[ shortcode.string() ] = clone;

				return shortcode;
			},
			/**
			 * Triggered when double-clicking a collection shortcode placeholder
			 *   in the editor
			 *
			 * @param {string} content Content that is searched for possible
			 *    shortcode markup matching the passed tag name,
			 *
			 * @this wp.media.{prop}
			 *
			 * @return {wp.media.view.MediaFrame.Select} A media workflow.
			 */
			edit: function( content ) {
				var shortcode = wp.shortcode.next( this.tag, content ),
					defaultPostId = this.defaults.id,
					attachments, selection, state;

				// Bail if we didn't match the shortcode or all of the content.
				if ( ! shortcode || shortcode.content !== content ) {
					return;
				}

				// Ignore the rest of the match object.
				shortcode = shortcode.shortcode;

				if ( _.isUndefined( shortcode.get('id') ) && ! _.isUndefined( defaultPostId ) ) {
					shortcode.set( 'id', defaultPostId );
				}

				attachments = this.attachments( shortcode );

				selection = new wp.media.model.Selection( attachments.models, {
					props:    attachments.props.toJSON(),
					multiple: true
				});

				selection[ this.tag ] = attachments[ this.tag ];

				// Fetch the query's attachments, and then break ties from the
				// query to allow for sorting.
				selection.more().done( function() {
					// Break ties with the query.
					selection.props.set({ query: false });
					selection.unmirror();
					selection.props.unset('orderby');
				});

				// Destroy the previous gallery frame.
				if ( this.frame ) {
					this.frame.dispose();
				}

				if ( shortcode.attrs.named.type && 'video' === shortcode.attrs.named.type ) {
					state = 'video-' + this.tag + '-edit';
				} else {
					state = this.tag + '-edit';
				}

				// Store the current frame.
				this.frame = wp.media({
					frame:     'post',
					state:     state,
					title:     this.editTitle,
					editing:   true,
					multiple:  true,
					selection: selection
				}).open();

				return this.frame;
			},

			setDefaults: function( attrs ) {
				var self = this;
				// Remove default attributes from the shortcode.
				_.each( this.defaults, function( value, key ) {
					attrs[ key ] = self.coerce( attrs, key );
					if ( value === attrs[ key ] ) {
						delete attrs[ key ];
					}
				});

				return attrs;
			}
		}, attributes );
	};

	wp.media._galleryDefaults = {
		itemtag: 'dl',
		icontag: 'dt',
		captiontag: 'dd',
		columns: '3',
		link: 'post',
		size: 'thumbnail',
		order: 'ASC',
		id: wp.media.view.settings.post && wp.media.view.settings.post.id,
		orderby : 'menu_order ID'
	};

	if ( wp.media.view.settings.galleryDefaults ) {
		wp.media.galleryDefaults = _.extend( {}, wp.media._galleryDefaults, wp.media.view.settings.galleryDefaults );
	} else {
		wp.media.galleryDefaults = wp.media._galleryDefaults;
	}

	wp.media.gallery = new wp.media.collection({
		tag: 'gallery',
		type : 'image',
		editTitle : wp.media.view.l10n.editGalleryTitle,
		defaults : wp.media.galleryDefaults,

		setDefaults: function( attrs ) {
			var self = this, changed = ! _.isEqual( wp.media.galleryDefaults, wp.media._galleryDefaults );
			_.each( this.defaults, function( value, key ) {
				attrs[ key ] = self.coerce( attrs, key );
				if ( value === attrs[ key ] && ( ! changed || value === wp.media._galleryDefaults[ key ] ) ) {
					delete attrs[ key ];
				}
			} );
			return attrs;
		}
	});

	/**
	 * @namespace wp.media.featuredImage
	 * @memberOf wp.media
	 */
	wp.media.featuredImage = {
		/**
		 * Get the featured image post ID
		 *
		 * @return {wp.media.view.settings.post.featuredImageId|number}
		 */
		get: function() {
			return wp.media.view.settings.post.featuredImageId;
		},
		/**
		 * Sets the featured image ID property and sets the HTML in the post meta box to the new featured image.
		 *
		 * @param {number} id The post ID of the featured image, or -1 to unset it.
		 */
		set: function( id ) {
			var settings = wp.media.view.settings;

			settings.post.featuredImageId = id;

			wp.media.post( 'get-post-thumbnail-html', {
				post_id:      settings.post.id,
				thumbnail_id: settings.post.featuredImageId,
				_wpnonce:     settings.post.nonce
			}).done( function( html ) {
				if ( '0' === html ) {
					window.alert( wp.i18n.__( 'Could not set that as the thumbnail image. Try a different attachment.' ) );
					return;
				}
				$( '.inside', '#postimagediv' ).html( html );
			});
		},
		/**
		 * Remove the featured image id, save the post thumbnail data and
		 * set the HTML in the post meta box to no featured image.
		 */
		remove: function() {
			wp.media.featuredImage.set( -1 );
		},
		/**
		 * The Featured Image workflow
		 *
		 * @this wp.media.featuredImage
		 *
		 * @return {wp.media.view.MediaFrame.Select} A media workflow.
		 */
		frame: function() {
			if ( this._frame ) {
				wp.media.frame = this._frame;
				return this._frame;
			}

			this._frame = wp.media({
				state: 'featured-image',
				states: [ new wp.media.controller.FeaturedImage() , new wp.media.controller.EditImage() ]
			});

			this._frame.on( 'toolbar:create:featured-image', function( toolbar ) {
				/**
				 * @this wp.media.view.MediaFrame.Select
				 */
				this.createSelectToolbar( toolbar, {
					text: wp.media.view.l10n.setFeaturedImage
				});
			}, this._frame );

			this._frame.on( 'content:render:edit-image', function() {
				var selection = this.state('featured-image').get('selection'),
					view = new wp.media.view.EditImage( { model: selection.single(), controller: this } ).render();

				this.content.set( view );

				// After bringing in the frame, load the actual editor via an Ajax call.
				view.loadEditor();

			}, this._frame );

			this._frame.state('featured-image').on( 'select', this.select );
			return this._frame;
		},
		/**
		 * 'select' callback for Featured Image workflow, triggered when
		 *  the 'Set Featured Image' button is clicked in the media modal.
		 *
		 * @this wp.media.controller.FeaturedImage
		 */
		select: function() {
			var selection = this.get('selection').single();

			if ( ! wp.media.view.settings.post.featuredImageId ) {
				return;
			}

			wp.media.featuredImage.set( selection ? selection.id : -1 );
		},
		/**
		 * Open the content media manager to the 'featured image' tab when
		 * the post thumbnail is clicked.
		 *
		 * Update the featured image id when the 'remove' link is clicked.
		 */
		init: function() {
			$('#postimagediv').on( 'click', '#set-post-thumbnail', function( event ) {
				event.preventDefault();
				// Stop propagation to prevent thickbox from activating.
				event.stopPropagation();

				wp.media.featuredImage.frame().open();
			}).on( 'click', '#remove-post-thumbnail', function() {
				wp.media.featuredImage.remove();
				return false;
			});
		}
	};

	$( wp.media.featuredImage.init );

	/** @namespace wp.media.editor */
	wp.media.editor = {
		/**
		 * Send content to the editor
		 *
		 * @param {string} html Content to send to the editor
		 */
		insert: function( html ) {
			var editor, wpActiveEditor,
				hasTinymce = ! _.isUndefined( window.tinymce ),
				hasQuicktags = ! _.isUndefined( window.QTags );

			if ( this.activeEditor ) {
				wpActiveEditor = window.wpActiveEditor = this.activeEditor;
			} else {
				wpActiveEditor = window.wpActiveEditor;
			}

			/*
			 * Delegate to the global `send_to_editor` if it exists.
			 * This attempts to play nice with any themes/plugins
			 * that have overridden the insert functionality.
			 */
			if ( window.send_to_editor ) {
				return window.send_to_editor.apply( this, arguments );
			}

			if ( ! wpActiveEditor ) {
				if ( hasTinymce && tinymce.activeEditor ) {
					editor = tinymce.activeEditor;
					wpActiveEditor = window.wpActiveEditor = editor.id;
				} else if ( ! hasQuicktags ) {
					return false;
				}
			} else if ( hasTinymce ) {
				editor = tinymce.get( wpActiveEditor );
			}

			if ( editor && ! editor.isHidden() ) {
				editor.execCommand( 'mceInsertContent', false, html );
			} else if ( hasQuicktags ) {
				QTags.insertContent( html );
			} else {
				document.getElementById( wpActiveEditor ).value += html;
			}

			// If the old thickbox remove function exists, call it in case
			// a theme/plugin overloaded it.
			if ( window.tb_remove ) {
				try { window.tb_remove(); } catch( e ) {}
			}
		},

		/**
		 * Setup 'workflow' and add to the 'workflows' cache. 'open' can
		 *  subsequently be called upon it.
		 *
		 * @param {string} id A slug used to identify the workflow.
		 * @param {Object} [options={}]
		 *
		 * @this wp.media.editor
		 *
		 * @return {wp.media.view.MediaFrame.Select} A media workflow.
		 */
		add: function( id, options ) {
			var workflow = this.get( id );

			// Only add once: if exists return existing.
			if ( workflow ) {
				return workflow;
			}

			workflow = workflows[ id ] = wp.media( _.defaults( options || {}, {
				frame:    'post',
				state:    'insert',
				title:    wp.media.view.l10n.addMedia,
				multiple: true
			} ) );

			workflow.on( 'insert', function( selection ) {
				var state = workflow.state();

				selection = selection || state.get('selection');

				if ( ! selection ) {
					return;
				}

				$.when.apply( $, selection.map( function( attachment ) {
					var display = state.display( attachment ).toJSON();
					/**
					 * @this wp.media.editor
					 */
					return this.send.attachment( display, attachment.toJSON() );
				}, this ) ).done( function() {
					wp.media.editor.insert( _.toArray( arguments ).join('\n\n') );
				});
			}, this );

			workflow.state('gallery-edit').on( 'update', function( selection ) {
				/**
				 * @this wp.media.editor
				 */
				this.insert( wp.media.gallery.shortcode( selection ).string() );
			}, this );

			workflow.state('playlist-edit').on( 'update', function( selection ) {
				/**
				 * @this wp.media.editor
				 */
				this.insert( wp.media.playlist.shortcode( selection ).string() );
			}, this );

			workflow.state('video-playlist-edit').on( 'update', function( selection ) {
				/**
				 * @this wp.media.editor
				 */
				this.insert( wp.media.playlist.shortcode( selection ).string() );
			}, this );

			workflow.state('embed').on( 'select', function() {
				/**
				 * @this wp.media.editor
				 */
				var state = workflow.state(),
					type = state.get('type'),
					embed = state.props.toJSON();

				embed.url = embed.url || '';

				if ( 'link' === type ) {
					_.defaults( embed, {
						linkText: embed.url,
						linkUrl: embed.url
					});

					this.send.link( embed ).done( function( resp ) {
						wp.media.editor.insert( resp );
					});

				} else if ( 'image' === type ) {
					_.defaults( embed, {
						title:   embed.url,
						linkUrl: '',
						align:   'none',
						link:    'none'
					});

					if ( 'none' === embed.link ) {
						embed.linkUrl = '';
					} else if ( 'file' === embed.link ) {
						embed.linkUrl = embed.url;
					}

					this.insert( wp.media.string.image( embed ) );
				}
			}, this );

			workflow.state('featured-image').on( 'select', wp.media.featuredImage.select );
			workflow.setState( workflow.options.state );
			return workflow;
		},
		/**
		 * Determines the proper current workflow id
		 *
		 * @param {string} [id=''] A slug used to identify the workflow.
		 *
		 * @return {wpActiveEditor|string|tinymce.activeEditor.id}
		 */
		id: function( id ) {
			if ( id ) {
				return id;
			}

			// If an empty `id` is provided, default to `wpActiveEditor`.
			id = window.wpActiveEditor;

			// If that doesn't work, fall back to `tinymce.activeEditor.id`.
			if ( ! id && ! _.isUndefined( window.tinymce ) && tinymce.activeEditor ) {
				id = tinymce.activeEditor.id;
			}

			// Last but not least, fall back to the empty string.
			id = id || '';
			return id;
		},
		/**
		 * Return the workflow specified by id
		 *
		 * @param {string} id A slug used to identify the workflow.
		 *
		 * @this wp.media.editor
		 *
		 * @return {wp.media.view.MediaFrame} A media workflow.
		 */
		get: function( id ) {
			id = this.id( id );
			return workflows[ id ];
		},
		/**
		 * Remove the workflow represented by id from the workflow cache
		 *
		 * @param {string} id A slug used to identify the workflow.
		 *
		 * @this wp.media.editor
		 */
		remove: function( id ) {
			id = this.id( id );
			delete workflows[ id ];
		},
		/** @namespace wp.media.editor.send */
		send: {
			/**
			 * Called when sending an attachment to the editor
			 *   from the medial modal.
			 *
			 * @param {Object} props Attachment details (align, link, size, etc).
			 * @param {Object} attachment The attachment object, media version of Post.
			 * @return {Promise}
			 */
			attachment: function( props, attachment ) {
				var caption = attachment.caption,
					options, html;

				// If captions are disabled, clear the caption.
				if ( ! wp.media.view.settings.captions ) {
					delete attachment.caption;
				}

				props = wp.media.string.props( props, attachment );

				options = {
					id:           attachment.id,
					post_content: attachment.description,
					post_excerpt: caption
				};

				if ( props.linkUrl ) {
					options.url = props.linkUrl;
				}

				if ( 'image' === attachment.type ) {
					html = wp.media.string.image( props );

					_.each({
						align: 'align',
						size:  'image-size',
						alt:   'image_alt'
					}, function( option, prop ) {
						if ( props[ prop ] ) {
							options[ option ] = props[ prop ];
						}
					});
				} else if ( 'video' === attachment.type ) {
					html = wp.media.string.video( props, attachment );
				} else if ( 'audio' === attachment.type ) {
					html = wp.media.string.audio( props, attachment );
				} else {
					html = wp.media.string.link( props );
					options.post_title = props.title;
				}

				return wp.media.post( 'send-attachment-to-editor', {
					nonce:      wp.media.view.settings.nonce.sendToEditor,
					attachment: options,
					html:       html,
					post_id:    wp.media.view.settings.post.id
				});
			},
			/**
			 * Called when 'Insert From URL' source is not an image. Example: YouTube url.
			 *
			 * @param {Object} embed
			 * @return {Promise}
			 */
			link: function( embed ) {
				return wp.media.post( 'send-link-to-editor', {
					nonce:     wp.media.view.settings.nonce.sendToEditor,
					src:       embed.linkUrl,
					link_text: embed.linkText,
					html:      wp.media.string.link( embed ),
					post_id:   wp.media.view.settings.post.id
				});
			}
		},
		/**
		 * Open a workflow
		 *
		 * @param {string} [id=undefined] Optional. A slug used to identify the workflow.
		 * @param {Object} [options={}]
		 *
		 * @this wp.media.editor
		 *
		 * @return {wp.media.view.MediaFrame}
		 */
		open: function( id, options ) {
			var workflow;

			options = options || {};

			id = this.id( id );
			this.activeEditor = id;

			workflow = this.get( id );

			// Redo workflow if state has changed.
			if ( ! workflow || ( workflow.options && options.state !== workflow.options.state ) ) {
				workflow = this.add( id, options );
			}

			wp.media.frame = workflow;

			return workflow.open();
		},

		/**
		 * Bind click event for .insert-media using event delegation
		 */
		init: function() {
			$(document.body)
				.on( 'click.add-media-button', '.insert-media', function( event ) {
					var elem = $( event.currentTarget ),
						editor = elem.data('editor'),
						options = {
							frame:    'post',
							state:    'insert',
							title:    wp.media.view.l10n.addMedia,
							multiple: true
						};

					event.preventDefault();

					if ( elem.hasClass( 'gallery' ) ) {
						options.state = 'gallery';
						options.title = wp.media.view.l10n.createGalleryTitle;
					}

					wp.media.editor.open( editor, options );
				});

			// Initialize and render the Editor drag-and-drop uploader.
			new wp.media.view.EditorUploader().render();
		}
	};

	_.bindAll( wp.media.editor, 'open' );
	$( wp.media.editor.init );
}(jQuery, _));

F1le Man4ger