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Edit File : class-wp-dependencies.php \| Size : 16.61 KB
<?php /** * Dependencies API: WP_Dependencies base class * * @since 2.6.0 * * @package WordPress * @subpackage Dependencies / /* * Core base class extended to register items. * * @since 2.6.0 * * @see _WP_Dependency / #[AllowDynamicProperties] class WP_Dependencies { /* * An array of all registered dependencies keyed by handle. * * @since 2.6.8 * * @var _WP_Dependency[] / public $registered = array(); /* * An array of handles of queued dependencies. * * @since 2.6.8 * * @var string[] / public $queue = array(); /* * An array of handles of dependencies to queue. * * @since 2.6.0 * * @var string[] / public $to_do = array(); /* * An array of handles of dependencies already queued. * * @since 2.6.0 * * @var string[] / public $done = array(); /* * An array of additional arguments passed when a handle is registered. * * Arguments are appended to the item query string. * * @since 2.6.0 * * @var array / public $args = array(); /* * An array of dependency groups to enqueue. * * Each entry is keyed by handle and represents the integer group level or boolean * false if the handle has no group. * * @since 2.8.0 * * @var (int\|false)[] / public $groups = array(); /* * A handle group to enqueue. * * @since 2.8.0 * * @deprecated 4.5.0 * @var int / public $group = 0; /* * Cached lookup array of flattened queued items and dependencies. * * @since 5.4.0 * * @var array / private $all_queued_deps; /* * List of assets enqueued before details were registered. * * @since 5.9.0 * * @var array / private $queued_before_register = array(); /* * List of handles for dependencies encountered which themselves have missing dependencies. * * A dependency handle is added to this list when it is discovered to have missing dependencies. At this time, a * warning is emitted with {@see _doing_it_wrong()}. The handle is then added to this list, so that duplicate * warnings don't occur. * * @since 6.9.1 * @var string[] / private $dependencies_with_missing_dependencies = array(); /* * Processes the items and dependencies. * * Processes the items passed to it or the queue, and their dependencies. * * @since 2.6.0 * @since 2.8.0 Added the `$group` parameter. * * @param string\|string[]\|false $handles Optional. Items to be processed: queue (false), * single item (string), or multiple items (array of strings). * Default false. * @param int\|false $group Optional. Group level: level (int), no group (false). * @return string[] Array of handles of items that have been processed. / public function do_items( $handles = false, $group = false ) { / * If nothing is passed, print the queue. If a string is passed, * print that item. If an array is passed, print those items. / $handles = false === $handles ? $this->queue : (array) $handles; $this->all_deps( $handles ); foreach ( $this->to_do as $key => $handle ) { if ( ! in_array( $handle, $this->done, true ) && isset( $this->registered[ $handle ] ) ) { / * Attempt to process the item. If successful, * add the handle to the done array. * * Unset the item from the to_do array. / if ( $this->do_item( $handle, $group ) ) { $this->done[] = $handle; } unset( $this->to_do[ $key ] ); } } return $this->done; } /* * Processes a dependency. * * @since 2.6.0 * @since 5.5.0 Added the `$group` parameter. * * @param string $handle Name of the item. Should be unique. * @param int\|false $group Optional. Group level: level (int), no group (false). * Default false. * @return bool True on success, false if not set. / public function do_item( $handle, $group = false ) { return isset( $this->registered[ $handle ] ); } /* * Determines dependencies. * * Recursively builds an array of items to process taking * dependencies into account. Does NOT catch infinite loops. * * @since 2.1.0 * @since 2.6.0 Moved from `WP_Scripts`. * @since 2.8.0 Added the `$group` parameter. * * @param string\|string[] $handles Item handle (string) or item handles (array of strings). * @param bool $recursion Optional. Internal flag that function is calling itself. * Default false. * @param int\|false $group Optional. Group level: level (int), no group (false). * Default false. * @return bool True on success, false on failure. / public function all_deps( $handles, $recursion = false, $group = false ) { $handles = (array) $handles; if ( ! $handles ) { return false; } foreach ( $handles as $handle ) { $handle_parts = explode( '?', $handle ); $handle = $handle_parts[0]; $queued = in_array( $handle, $this->to_do, true ); if ( in_array( $handle, $this->done, true ) ) { // Already done. continue; } $moved = $this->set_group( $handle, $recursion, $group ); $new_group = $this->groups[ $handle ]; if ( $queued && ! $moved ) { // Already queued and in the right group. continue; } $keep_going = true; $missing_dependencies = array(); if ( isset( $this->registered[ $handle ] ) && count( $this->registered[ $handle ]->deps ) > 0 ) { $missing_dependencies = array_diff( $this->registered[ $handle ]->deps, array_keys( $this->registered ) ); } if ( ! isset( $this->registered[ $handle ] ) ) { $keep_going = false; // Item doesn't exist. } elseif ( count( $missing_dependencies ) > 0 ) { if ( ! in_array( $handle, $this->dependencies_with_missing_dependencies, true ) ) { _doing_it_wrong( get_class( $this ) . '::add', $this->get_dependency_warning_message( $handle, $missing_dependencies ), '6.9.1' ); $this->dependencies_with_missing_dependencies[] = $handle; } $keep_going = false; // Item requires dependencies that don't exist. } elseif ( $this->registered[ $handle ]->deps && ! $this->all_deps( $this->registered[ $handle ]->deps, true, $new_group ) ) { $keep_going = false; // Item requires dependencies that don't exist. } if ( ! $keep_going ) { // Either item or its dependencies don't exist. if ( $recursion ) { return false; // Abort this branch. } else { continue; // We're at the top level. Move on to the next one. } } if ( $queued ) { // Already grabbed it and its dependencies. continue; } if ( isset( $handle_parts[1] ) ) { $this->args[ $handle ] = $handle_parts[1]; } $this->to_do[] = $handle; } return true; } /* * Register an item. * * Registers the item if no item of that name already exists. * * @since 2.1.0 * @since 2.6.0 Moved from `WP_Scripts`. * * @param string $handle Name of the item. Should be unique. * @param string\|false $src Full URL of the item, or path of the item relative * to the WordPress root directory. If source is set to false, * the item is an alias of other items it depends on. * @param string[] $deps Optional. An array of registered item handles this item depends on. * Default empty array. * @param string\|bool\|null $ver Optional. String specifying item version number, if it has one, * which is added to the URL as a query string for cache busting purposes. * If version is set to false, a version number is automatically added * equal to current installed WordPress version. * If set to null, no version is added. * @param mixed $args Optional. Custom property of the item. NOT the class property $args. * Examples: $media, $in_footer. * @return bool Whether the item has been registered. True on success, false on failure. / public function add( $handle, $src, $deps = array(), $ver = false, $args = null ) { if ( isset( $this->registered[ $handle ] ) ) { return false; } $this->registered[ $handle ] = new _WP_Dependency( $handle, $src, $deps, $ver, $args ); // If the item was enqueued before the details were registered, enqueue it now. if ( array_key_exists( $handle, $this->queued_before_register ) ) { if ( ! is_null( $this->queued_before_register[ $handle ] ) ) { $this->enqueue( $handle . '?' . $this->queued_before_register[ $handle ] ); } else { $this->enqueue( $handle ); } unset( $this->queued_before_register[ $handle ] ); } return true; } /* * Add extra item data. * * Adds data to a registered item. * * @since 2.6.0 * * @param string $handle Name of the item. Should be unique. * @param string $key The data key. * @param mixed $value The data value. * @return bool True on success, false on failure. / public function add_data( $handle, $key, $value ) { if ( ! isset( $this->registered[ $handle ] ) ) { return false; } if ( 'conditional' === $key && '_required-conditional-dependency_' !== $value ) { _deprecated_argument( 'WP_Dependencies->add_data()', '6.9.0', __( 'IE conditional comments are ignored by all supported browsers.' ) ); } return $this->registered[ $handle ]->add_data( $key, $value ); } /* * Get extra item data. * * Gets data associated with a registered item. * * @since 3.3.0 * * @param string $handle Name of the item. Should be unique. * @param string $key The data key. * @return mixed Extra item data (string), false otherwise. / public function get_data( $handle, $key ) { if ( ! isset( $this->registered[ $handle ] ) ) { return false; } if ( ! isset( $this->registered[ $handle ]->extra[ $key ] ) ) { return false; } return $this->registered[ $handle ]->extra[ $key ]; } /* * Un-register an item or items. * * @since 2.1.0 * @since 2.6.0 Moved from `WP_Scripts`. * * @param string\|string[] $handles Item handle (string) or item handles (array of strings). / public function remove( $handles ) { foreach ( (array) $handles as $handle ) { unset( $this->registered[ $handle ] ); } } /* * Queue an item or items. * * Decodes handles and arguments, then queues handles and stores * arguments in the class property $args. For example in extending * classes, $args is appended to the item url as a query string. * Note $args is NOT the $args property of items in the $registered array. * * @since 2.1.0 * @since 2.6.0 Moved from `WP_Scripts`. * * @param string\|string[] $handles Item handle (string) or item handles (array of strings). / public function enqueue( $handles ) { foreach ( (array) $handles as $handle ) { $handle = explode( '?', $handle ); if ( ! in_array( $handle[0], $this->queue, true ) && isset( $this->registered[ $handle[0] ] ) ) { $this->queue[] = $handle[0]; // Reset all dependencies so they must be recalculated in recurse_deps(). $this->all_queued_deps = null; if ( isset( $handle[1] ) ) { $this->args[ $handle[0] ] = $handle[1]; } } elseif ( ! isset( $this->registered[ $handle[0] ] ) ) { $this->queued_before_register[ $handle[0] ] = null; // $args if ( isset( $handle[1] ) ) { $this->queued_before_register[ $handle[0] ] = $handle[1]; } } } } /* * Dequeue an item or items. * * Decodes handles and arguments, then dequeues handles * and removes arguments from the class property $args. * * @since 2.1.0 * @since 2.6.0 Moved from `WP_Scripts`. * * @param string\|string[] $handles Item handle (string) or item handles (array of strings). / public function dequeue( $handles ) { foreach ( (array) $handles as $handle ) { $handle = explode( '?', $handle ); $key = array_search( $handle[0], $this->queue, true ); if ( false !== $key ) { // Reset all dependencies so they must be recalculated in recurse_deps(). $this->all_queued_deps = null; unset( $this->queue[ $key ] ); unset( $this->args[ $handle[0] ] ); } elseif ( array_key_exists( $handle[0], $this->queued_before_register ) ) { unset( $this->queued_before_register[ $handle[0] ] ); } } } /* * Recursively search the passed dependency tree for a handle. * * @since 4.0.0 * * @param string[] $queue An array of queued _WP_Dependency handles. * @param string $handle Name of the item. Should be unique. * @return bool Whether the handle is found after recursively searching the dependency tree. / protected function recurse_deps( $queue, $handle ) { if ( isset( $this->all_queued_deps ) ) { return isset( $this->all_queued_deps[ $handle ] ); } $all_deps = array_fill_keys( $queue, true ); $queues = array(); $done = array(); while ( $queue ) { foreach ( $queue as $queued ) { if ( ! isset( $done[ $queued ] ) && isset( $this->registered[ $queued ] ) ) { $deps = $this->registered[ $queued ]->deps; if ( $deps ) { $all_deps += array_fill_keys( $deps, true ); array_push( $queues, $deps ); } $done[ $queued ] = true; } } $queue = array_pop( $queues ); } $this->all_queued_deps = $all_deps; return isset( $this->all_queued_deps[ $handle ] ); } /* * Query the list for an item. * * @since 2.1.0 * @since 2.6.0 Moved from `WP_Scripts`. * * @param string $handle Name of the item. Should be unique. * @param string $status Optional. Status of the item to query. Default 'registered'. * @return bool\|_WP_Dependency Found, or object Item data. / public function query( $handle, $status = 'registered' ) { switch ( $status ) { case 'registered': case 'scripts': // Back compat. if ( isset( $this->registered[ $handle ] ) ) { return $this->registered[ $handle ]; } return false; case 'enqueued': case 'queue': // Back compat. if ( in_array( $handle, $this->queue, true ) ) { return true; } return $this->recurse_deps( $this->queue, $handle ); case 'to_do': case 'to_print': // Back compat. return in_array( $handle, $this->to_do, true ); case 'done': case 'printed': // Back compat. return in_array( $handle, $this->done, true ); } return false; } /* * Set item group, unless already in a lower group. * * @since 2.8.0 * * @param string $handle Name of the item. Should be unique. * @param bool $recursion Internal flag that calling function was called recursively. * @param int\|false $group Group level: level (int), no group (false). * @return bool Not already in the group or a lower group. / public function set_group( $handle, $recursion, $group ) { $group = (int) $group; if ( isset( $this->groups[ $handle ] ) && $this->groups[ $handle ] <= $group ) { return false; } $this->groups[ $handle ] = $group; return true; } /* * Get etag header for cache validation. * * @since 6.7.0 * * @global string $wp_version The WordPress version string. * * @param string[] $load Array of script or style handles to load. * @return string Etag header. / public function get_etag( $load ) { / * Note: wp_get_wp_version() is not used here, as this file can be included * via wp-admin/load-scripts.php or wp-admin/load-styles.php, in which case * wp-includes/functions.php is not loaded. / global $wp_version; $etag = "WP:{$wp_version};"; foreach ( $load as $handle ) { if ( ! array_key_exists( $handle, $this->registered ) ) { continue; } $ver = $this->registered[ $handle ]->ver ?? $wp_version; $etag .= "{$handle}:{$ver};"; } / * This is not intended to be cryptographically secure, just a fast way to get * a fixed length string based on the script versions. As this file does not * load the full WordPress environment, it is not possible to use the salted * wp_hash() function. / return 'W/"' . md5( $etag ) . '"'; } /* * Gets a dependency warning message for a handle. * * @since 6.9.1 * * @param string $handle Handle with missing dependencies. * @param string[] $missing_dependency_handles Missing dependency handles. * @return string Formatted, localized warning message. / protected function get_dependency_warning_message( $handle, $missing_dependency_handles ) { return sprintf( / translators: 1: Handle, 2: List of missing dependency handles. */ __( 'The handle "%1$s" was enqueued with dependencies that are not registered: %2$s.' ), $handle, implode( wp_get_list_item_separator(), $missing_dependency_handles ) ); } } Back

Edit File : class-wp-dependencies.php | Size : 16.61 KB

<?php
/**
 * Dependencies API: WP_Dependencies base class
 *
 * @since 2.6.0
 *
 * @package WordPress
 * @subpackage Dependencies
 */

/**
 * Core base class extended to register items.
 *
 * @since 2.6.0
 *
 * @see _WP_Dependency
 */
#[AllowDynamicProperties]
class WP_Dependencies {
	/**
	 * An array of all registered dependencies keyed by handle.
	 *
	 * @since 2.6.8
	 *
	 * @var _WP_Dependency[]
	 */
	public $registered = array();

/**
	 * An array of handles of queued dependencies.
	 *
	 * @since 2.6.8
	 *
	 * @var string[]
	 */
	public $queue = array();

/**
	 * An array of handles of dependencies to queue.
	 *
	 * @since 2.6.0
	 *
	 * @var string[]
	 */
	public $to_do = array();

/**
	 * An array of handles of dependencies already queued.
	 *
	 * @since 2.6.0
	 *
	 * @var string[]
	 */
	public $done = array();

/**
	 * An array of additional arguments passed when a handle is registered.
	 *
	 * Arguments are appended to the item query string.
	 *
	 * @since 2.6.0
	 *
	 * @var array
	 */
	public $args = array();

/**
	 * An array of dependency groups to enqueue.
	 *
	 * Each entry is keyed by handle and represents the integer group level or boolean
	 * false if the handle has no group.
	 *
	 * @since 2.8.0
	 *
	 * @var (int|false)[]
	 */
	public $groups = array();

/**
	 * A handle group to enqueue.
	 *
	 * @since 2.8.0
	 *
	 * @deprecated 4.5.0
	 * @var int
	 */
	public $group = 0;

/**
	 * Cached lookup array of flattened queued items and dependencies.
	 *
	 * @since 5.4.0
	 *
	 * @var array
	 */
	private $all_queued_deps;

/**
	 * List of assets enqueued before details were registered.
	 *
	 * @since 5.9.0
	 *
	 * @var array
	 */
	private $queued_before_register = array();

/**
	 * List of handles for dependencies encountered which themselves have missing dependencies.
	 *
	 * A dependency handle is added to this list when it is discovered to have missing dependencies. At this time, a
	 * warning is emitted with {@see _doing_it_wrong()}. The handle is then added to this list, so that duplicate
	 * warnings don't occur.
	 *
	 * @since 6.9.1
	 * @var string[]
	 */
	private $dependencies_with_missing_dependencies = array();

/**
	 * Processes the items and dependencies.
	 *
	 * Processes the items passed to it or the queue, and their dependencies.
	 *
	 * @since 2.6.0
	 * @since 2.8.0 Added the `$group` parameter.
	 *
	 * @param string|string[]|false $handles Optional. Items to be processed: queue (false),
	 *                                       single item (string), or multiple items (array of strings).
	 *                                       Default false.
	 * @param int|false             $group   Optional. Group level: level (int), no group (false).
	 * @return string[] Array of handles of items that have been processed.
	 */
	public function do_items( $handles = false, $group = false ) {
		/*
		 * If nothing is passed, print the queue. If a string is passed,
		 * print that item. If an array is passed, print those items.
		 */
		$handles = false === $handles ? $this->queue : (array) $handles;
		$this->all_deps( $handles );

foreach ( $this->to_do as $key => $handle ) {
			if ( ! in_array( $handle, $this->done, true ) && isset( $this->registered[ $handle ] ) ) {
				/*
				 * Attempt to process the item. If successful,
				 * add the handle to the done array.
				 *
				 * Unset the item from the to_do array.
				 */
				if ( $this->do_item( $handle, $group ) ) {
					$this->done[] = $handle;
				}

unset( $this->to_do[ $key ] );
			}
		}

return $this->done;
	}

/**
	 * Processes a dependency.
	 *
	 * @since 2.6.0
	 * @since 5.5.0 Added the `$group` parameter.
	 *
	 * @param string    $handle Name of the item. Should be unique.
	 * @param int|false $group  Optional. Group level: level (int), no group (false).
	 *                          Default false.
	 * @return bool True on success, false if not set.
	 */
	public function do_item( $handle, $group = false ) {
		return isset( $this->registered[ $handle ] );
	}

/**
	 * Determines dependencies.
	 *
	 * Recursively builds an array of items to process taking
	 * dependencies into account. Does NOT catch infinite loops.
	 *
	 * @since 2.1.0
	 * @since 2.6.0 Moved from `WP_Scripts`.
	 * @since 2.8.0 Added the `$group` parameter.
	 *
	 * @param string|string[] $handles   Item handle (string) or item handles (array of strings).
	 * @param bool            $recursion Optional. Internal flag that function is calling itself.
	 *                                   Default false.
	 * @param int|false       $group     Optional. Group level: level (int), no group (false).
	 *                                   Default false.
	 * @return bool True on success, false on failure.
	 */
	public function all_deps( $handles, $recursion = false, $group = false ) {
		$handles = (array) $handles;
		if ( ! $handles ) {
			return false;
		}

foreach ( $handles as $handle ) {
			$handle_parts = explode( '?', $handle );
			$handle       = $handle_parts[0];
			$queued       = in_array( $handle, $this->to_do, true );

if ( in_array( $handle, $this->done, true ) ) { // Already done.
				continue;
			}

$moved     = $this->set_group( $handle, $recursion, $group );
			$new_group = $this->groups[ $handle ];

if ( $queued && ! $moved ) { // Already queued and in the right group.
				continue;
			}

$keep_going           = true;
			$missing_dependencies = array();
			if ( isset( $this->registered[ $handle ] ) && count( $this->registered[ $handle ]->deps ) > 0 ) {
				$missing_dependencies = array_diff( $this->registered[ $handle ]->deps, array_keys( $this->registered ) );
			}
			if ( ! isset( $this->registered[ $handle ] ) ) {
				$keep_going = false; // Item doesn't exist.
			} elseif ( count( $missing_dependencies ) > 0 ) {
				if ( ! in_array( $handle, $this->dependencies_with_missing_dependencies, true ) ) {
					_doing_it_wrong(
						get_class( $this ) . '::add',
						$this->get_dependency_warning_message( $handle, $missing_dependencies ),
						'6.9.1'
					);
					$this->dependencies_with_missing_dependencies[] = $handle;
				}
				$keep_going = false; // Item requires dependencies that don't exist.
			} elseif ( $this->registered[ $handle ]->deps && ! $this->all_deps( $this->registered[ $handle ]->deps, true, $new_group ) ) {
				$keep_going = false; // Item requires dependencies that don't exist.
			}

if ( ! $keep_going ) { // Either item or its dependencies don't exist.
				if ( $recursion ) {
					return false; // Abort this branch.
				} else {
					continue; // We're at the top level. Move on to the next one.
				}
			}

if ( $queued ) { // Already grabbed it and its dependencies.
				continue;
			}

if ( isset( $handle_parts[1] ) ) {
				$this->args[ $handle ] = $handle_parts[1];
			}

$this->to_do[] = $handle;
		}

return true;
	}

/**
	 * Register an item.
	 *
	 * Registers the item if no item of that name already exists.
	 *
	 * @since 2.1.0
	 * @since 2.6.0 Moved from `WP_Scripts`.
	 *
	 * @param string           $handle Name of the item. Should be unique.
	 * @param string|false     $src    Full URL of the item, or path of the item relative
	 *                                 to the WordPress root directory. If source is set to false,
	 *                                 the item is an alias of other items it depends on.
	 * @param string[]         $deps   Optional. An array of registered item handles this item depends on.
	 *                                 Default empty array.
	 * @param string|bool|null $ver    Optional. String specifying item version number, if it has one,
	 *                                 which is added to the URL as a query string for cache busting purposes.
	 *                                 If version is set to false, a version number is automatically added
	 *                                 equal to current installed WordPress version.
	 *                                 If set to null, no version is added.
	 * @param mixed            $args   Optional. Custom property of the item. NOT the class property $args.
	 *                                 Examples: $media, $in_footer.
	 * @return bool Whether the item has been registered. True on success, false on failure.
	 */
	public function add( $handle, $src, $deps = array(), $ver = false, $args = null ) {
		if ( isset( $this->registered[ $handle ] ) ) {
			return false;
		}
		$this->registered[ $handle ] = new _WP_Dependency( $handle, $src, $deps, $ver, $args );

// If the item was enqueued before the details were registered, enqueue it now.
		if ( array_key_exists( $handle, $this->queued_before_register ) ) {
			if ( ! is_null( $this->queued_before_register[ $handle ] ) ) {
				$this->enqueue( $handle . '?' . $this->queued_before_register[ $handle ] );
			} else {
				$this->enqueue( $handle );
			}

unset( $this->queued_before_register[ $handle ] );
		}

return true;
	}

/**
	 * Add extra item data.
	 *
	 * Adds data to a registered item.
	 *
	 * @since 2.6.0
	 *
	 * @param string $handle Name of the item. Should be unique.
	 * @param string $key    The data key.
	 * @param mixed  $value  The data value.
	 * @return bool True on success, false on failure.
	 */
	public function add_data( $handle, $key, $value ) {
		if ( ! isset( $this->registered[ $handle ] ) ) {
			return false;
		}
		if ( 'conditional' === $key && '_required-conditional-dependency_' !== $value ) {
			_deprecated_argument(
				'WP_Dependencies->add_data()',
				'6.9.0',
				__( 'IE conditional comments are ignored by all supported browsers.' )
			);
		}

return $this->registered[ $handle ]->add_data( $key, $value );
	}

/**
	 * Get extra item data.
	 *
	 * Gets data associated with a registered item.
	 *
	 * @since 3.3.0
	 *
	 * @param string $handle Name of the item. Should be unique.
	 * @param string $key    The data key.
	 * @return mixed Extra item data (string), false otherwise.
	 */
	public function get_data( $handle, $key ) {
		if ( ! isset( $this->registered[ $handle ] ) ) {
			return false;
		}

if ( ! isset( $this->registered[ $handle ]->extra[ $key ] ) ) {
			return false;
		}

return $this->registered[ $handle ]->extra[ $key ];
	}

/**
	 * Un-register an item or items.
	 *
	 * @since 2.1.0
	 * @since 2.6.0 Moved from `WP_Scripts`.
	 *
	 * @param string|string[] $handles Item handle (string) or item handles (array of strings).
	 */
	public function remove( $handles ) {
		foreach ( (array) $handles as $handle ) {
			unset( $this->registered[ $handle ] );
		}
	}

/**
	 * Queue an item or items.
	 *
	 * Decodes handles and arguments, then queues handles and stores
	 * arguments in the class property $args. For example in extending
	 * classes, $args is appended to the item url as a query string.
	 * Note $args is NOT the $args property of items in the $registered array.
	 *
	 * @since 2.1.0
	 * @since 2.6.0 Moved from `WP_Scripts`.
	 *
	 * @param string|string[] $handles Item handle (string) or item handles (array of strings).
	 */
	public function enqueue( $handles ) {
		foreach ( (array) $handles as $handle ) {
			$handle = explode( '?', $handle );

if ( ! in_array( $handle[0], $this->queue, true ) && isset( $this->registered[ $handle[0] ] ) ) {
				$this->queue[] = $handle[0];

// Reset all dependencies so they must be recalculated in recurse_deps().
				$this->all_queued_deps = null;

if ( isset( $handle[1] ) ) {
					$this->args[ $handle[0] ] = $handle[1];
				}
			} elseif ( ! isset( $this->registered[ $handle[0] ] ) ) {
				$this->queued_before_register[ $handle[0] ] = null; // $args

if ( isset( $handle[1] ) ) {
					$this->queued_before_register[ $handle[0] ] = $handle[1];
				}
			}
		}
	}

/**
	 * Dequeue an item or items.
	 *
	 * Decodes handles and arguments, then dequeues handles
	 * and removes arguments from the class property $args.
	 *
	 * @since 2.1.0
	 * @since 2.6.0 Moved from `WP_Scripts`.
	 *
	 * @param string|string[] $handles Item handle (string) or item handles (array of strings).
	 */
	public function dequeue( $handles ) {
		foreach ( (array) $handles as $handle ) {
			$handle = explode( '?', $handle );
			$key    = array_search( $handle[0], $this->queue, true );

if ( false !== $key ) {
				// Reset all dependencies so they must be recalculated in recurse_deps().
				$this->all_queued_deps = null;

unset( $this->queue[ $key ] );
				unset( $this->args[ $handle[0] ] );
			} elseif ( array_key_exists( $handle[0], $this->queued_before_register ) ) {
				unset( $this->queued_before_register[ $handle[0] ] );
			}
		}
	}

/**
	 * Recursively search the passed dependency tree for a handle.
	 *
	 * @since 4.0.0
	 *
	 * @param string[] $queue  An array of queued _WP_Dependency handles.
	 * @param string   $handle Name of the item. Should be unique.
	 * @return bool Whether the handle is found after recursively searching the dependency tree.
	 */
	protected function recurse_deps( $queue, $handle ) {
		if ( isset( $this->all_queued_deps ) ) {
			return isset( $this->all_queued_deps[ $handle ] );
		}

$all_deps = array_fill_keys( $queue, true );
		$queues   = array();
		$done     = array();

while ( $queue ) {
			foreach ( $queue as $queued ) {
				if ( ! isset( $done[ $queued ] ) && isset( $this->registered[ $queued ] ) ) {
					$deps = $this->registered[ $queued ]->deps;
					if ( $deps ) {
						$all_deps += array_fill_keys( $deps, true );
						array_push( $queues, $deps );
					}
					$done[ $queued ] = true;
				}
			}
			$queue = array_pop( $queues );
		}

$this->all_queued_deps = $all_deps;

return isset( $this->all_queued_deps[ $handle ] );
	}

/**
	 * Query the list for an item.
	 *
	 * @since 2.1.0
	 * @since 2.6.0 Moved from `WP_Scripts`.
	 *
	 * @param string $handle Name of the item. Should be unique.
	 * @param string $status Optional. Status of the item to query. Default 'registered'.
	 * @return bool|_WP_Dependency Found, or object Item data.
	 */
	public function query( $handle, $status = 'registered' ) {
		switch ( $status ) {
			case 'registered':
			case 'scripts': // Back compat.
				if ( isset( $this->registered[ $handle ] ) ) {
					return $this->registered[ $handle ];
				}
				return false;

case 'enqueued':
			case 'queue': // Back compat.
				if ( in_array( $handle, $this->queue, true ) ) {
					return true;
				}
				return $this->recurse_deps( $this->queue, $handle );

case 'to_do':
			case 'to_print': // Back compat.
				return in_array( $handle, $this->to_do, true );

case 'done':
			case 'printed': // Back compat.
				return in_array( $handle, $this->done, true );
		}

return false;
	}

/**
	 * Set item group, unless already in a lower group.
	 *
	 * @since 2.8.0
	 *
	 * @param string    $handle    Name of the item. Should be unique.
	 * @param bool      $recursion Internal flag that calling function was called recursively.
	 * @param int|false $group     Group level: level (int), no group (false).
	 * @return bool Not already in the group or a lower group.
	 */
	public function set_group( $handle, $recursion, $group ) {
		$group = (int) $group;

if ( isset( $this->groups[ $handle ] ) && $this->groups[ $handle ] <= $group ) {
			return false;
		}

$this->groups[ $handle ] = $group;

return true;
	}

/**
	 * Get etag header for cache validation.
	 *
	 * @since 6.7.0
	 *
	 * @global string $wp_version The WordPress version string.
	 *
	 * @param string[] $load Array of script or style handles to load.
	 * @return string Etag header.
	 */
	public function get_etag( $load ) {
		/*
		 * Note: wp_get_wp_version() is not used here, as this file can be included
		 * via wp-admin/load-scripts.php or wp-admin/load-styles.php, in which case
		 * wp-includes/functions.php is not loaded.
		 */
		global $wp_version;

$etag = "WP:{$wp_version};";

foreach ( $load as $handle ) {
			if ( ! array_key_exists( $handle, $this->registered ) ) {
				continue;
			}

$ver   = $this->registered[ $handle ]->ver ?? $wp_version;
			$etag .= "{$handle}:{$ver};";
		}

/*
		 * This is not intended to be cryptographically secure, just a fast way to get
		 * a fixed length string based on the script versions. As this file does not
		 * load the full WordPress environment, it is not possible to use the salted
		 * wp_hash() function.
		 */
		return 'W/"' . md5( $etag ) . '"';
	}

/**
	 * Gets a dependency warning message for a handle.
	 *
	 * @since 6.9.1
	 *
	 * @param string   $handle                     Handle with missing dependencies.
	 * @param string[] $missing_dependency_handles Missing dependency handles.
	 * @return string Formatted, localized warning message.
	 */
	protected function get_dependency_warning_message( $handle, $missing_dependency_handles ) {
		return sprintf(
			/* translators: 1: Handle, 2: List of missing dependency handles. */
			__( 'The handle "%1$s" was enqueued with dependencies that are not registered: %2$s.' ),
			$handle,
			implode( wp_get_list_item_separator(), $missing_dependency_handles )
		);
	}
}

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