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<?php /** * Block Metadata Registry * * @package WordPress * @subpackage Blocks * @since 6.7.0 / /* * Class used for managing block metadata collections. * * The WP_Block_Metadata_Registry allows plugins to register metadata for large * collections of blocks (e.g., 50-100+) using a single PHP file. This approach * reduces the need to read and decode multiple `block.json` files, enhancing * performance through opcode caching. * * @since 6.7.0 / class WP_Block_Metadata_Registry { /* * Container for storing block metadata collections. * * Each entry maps a base path to its corresponding metadata and callback. * * @since 6.7.0 * @var array<string, array<string, mixed>> / private static $collections = array(); /* * Caches the last matched collection path for performance optimization. * * @since 6.7.0 * @var string\|null / private static $last_matched_collection = null; /* * Stores the default allowed collection root paths. * * @since 6.7.2 * @var string[]\|null / private static $default_collection_roots = null; /* * Registers a block metadata collection. * * This method allows registering a collection of block metadata from a single * manifest file, improving performance for large sets of blocks. * * The manifest file should be a PHP file that returns an associative array, where * the keys are the block identifiers (without their namespace) and the values are * the corresponding block metadata arrays. The block identifiers must match the * parent directory name for the respective `block.json` file. * * Example manifest file structure: * ``` * return array( * 'example-block' => array( * 'title' => 'Example Block', * 'category' => 'widgets', * 'icon' => 'smiley', * // ... other block metadata * ), * 'another-block' => array( * 'title' => 'Another Block', * 'category' => 'formatting', * 'icon' => 'star-filled', * // ... other block metadata * ), * // ... more block metadata entries * ); * ``` * * @since 6.7.0 * * @param string $path The absolute base path for the collection ( e.g., WP_PLUGIN_DIR . '/my-plugin/blocks/' ). * @param string $manifest The absolute path to the manifest file containing the metadata collection. * @return bool True if the collection was registered successfully, false otherwise. / public static function register_collection( $path, $manifest ) { $path = rtrim( wp_normalize_path( $path ), '/' ); $collection_roots = self::get_default_collection_roots(); /* * Filters the root directory paths for block metadata collections. * * Any block metadata collection that is registered must not use any of these paths, or any parent directory * path of them. Most commonly, block metadata collections should reside within one of these paths, though in * some scenarios they may also reside in entirely different directories (e.g. in case of symlinked plugins). * * Example: * * It is allowed to register a collection with path `WP_PLUGIN_DIR . '/my-plugin'`. * * It is not allowed to register a collection with path `WP_PLUGIN_DIR`. * * It is not allowed to register a collection with path `dirname( WP_PLUGIN_DIR )`. * * The default list encompasses the `wp-includes` directory, as well as the root directories for plugins, * must-use plugins, and themes. This filter can be used to expand the list, e.g. to custom directories that * contain symlinked plugins, so that these root directories cannot be used themselves for a block metadata * collection either. * * @since 6.7.2 * * @param string[] $collection_roots List of allowed metadata collection root paths. / $collection_roots = apply_filters( 'wp_allowed_block_metadata_collection_roots', $collection_roots ); $collection_roots = array_unique( array_map( static function ( $allowed_root ) { return rtrim( wp_normalize_path( $allowed_root ), '/' ); }, $collection_roots ) ); // Check if the path is valid: if ( ! self::is_valid_collection_path( $path, $collection_roots ) ) { _doing_it_wrong( __METHOD__, sprintf( / translators: %s: list of allowed collection roots / __( 'Block metadata collections cannot be registered as one of the following directories or their parent directories: %s' ), esc_html( implode( wp_get_list_item_separator(), $collection_roots ) ) ), '6.7.2' ); return false; } if ( ! file_exists( $manifest ) ) { _doing_it_wrong( __METHOD__, __( 'The specified manifest file does not exist.' ), '6.7.0' ); return false; } self::$collections[ $path ] = array( 'manifest' => $manifest, 'metadata' => null, ); return true; } /* * Retrieves block metadata for a given block within a specific collection. * * This method uses the registered collections to efficiently lookup * block metadata without reading individual `block.json` files. * * @since 6.7.0 * * @param string $file_or_folder The path to the file or folder containing the block. * @return array\|null The block metadata for the block, or null if not found. / public static function get_metadata( $file_or_folder ) { $file_or_folder = wp_normalize_path( $file_or_folder ); $path = self::find_collection_path( $file_or_folder ); if ( ! $path ) { return null; } $collection = &self::$collections[ $path ]; if ( null === $collection['metadata'] ) { // Load the manifest file if not already loaded $collection['metadata'] = require $collection['manifest']; } // Get the block name from the path. $block_name = self::default_identifier_callback( $file_or_folder ); return $collection['metadata'][ $block_name ] ?? null; } /* * Gets the list of absolute paths to all block metadata files that are part of the given collection. * * For instance, if a block metadata collection is registered with path `WP_PLUGIN_DIR . '/my-plugin/blocks/'`, * and the manifest file includes metadata for two blocks `'block-a'` and `'block-b'`, the result of this method * will be an array containing: * * `WP_PLUGIN_DIR . '/my-plugin/blocks/block-a/block.json'` * * `WP_PLUGIN_DIR . '/my-plugin/blocks/block-b/block.json'` * * @since 6.8.0 * * @param string $path The absolute base path for a previously registered collection. * @return string[] List of block metadata file paths, or an empty array if the given `$path` is invalid. / public static function get_collection_block_metadata_files( $path ) { $path = rtrim( wp_normalize_path( $path ), '/' ); if ( ! isset( self::$collections[ $path ] ) ) { _doing_it_wrong( __METHOD__, __( 'No registered block metadata collection was found for the provided path.' ), '6.8.0' ); return array(); } $collection = &self::$collections[ $path ]; if ( null === $collection['metadata'] ) { // Load the manifest file if not already loaded. $collection['metadata'] = require $collection['manifest']; } return array_map( // No normalization necessary since `$path` is already normalized and `$block_name` is just a folder name. static function ( $block_name ) use ( $path ) { return "{$path}/{$block_name}/block.json"; }, array_keys( $collection['metadata'] ) ); } /* * Finds the collection path for a given file or folder. * * @since 6.7.0 * * @param string $file_or_folder The normalized path to the file or folder. * @return string\|null The normalized collection path if found, or null if not found. / private static function find_collection_path( $file_or_folder ) { if ( empty( $file_or_folder ) ) { return null; } // Check the last matched collection first, since block registration usually happens in batches per plugin or theme. $path = rtrim( $file_or_folder, '/' ); if ( self::$last_matched_collection && str_starts_with( $path, self::$last_matched_collection ) ) { return self::$last_matched_collection; } $collection_paths = array_keys( self::$collections ); foreach ( $collection_paths as $collection_path ) { if ( str_starts_with( $path, $collection_path ) ) { self::$last_matched_collection = $collection_path; return $collection_path; } } return null; } /* * Checks if metadata exists for a given block name in a specific collection. * * @since 6.7.0 * * @param string $file_or_folder The path to the file or folder containing the block metadata. * @return bool True if metadata exists for the block, false otherwise. / public static function has_metadata( $file_or_folder ) { return null !== self::get_metadata( $file_or_folder ); } /* * Default identifier function to determine the block identifier from a given path. * * This function extracts the block identifier from the path: * - For 'block.json' files, it uses the parent directory name. * - For directories, it uses the directory name itself. * - For empty paths, it returns an empty string. * * For example: * - Path: '/wp-content/plugins/my-plugin/blocks/example/block.json' * Identifier: 'example' * - Path: '/wp-content/plugins/my-plugin/blocks/another-block' * Identifier: 'another-block' * * This default behavior matches the standard WordPress block structure. * * @since 6.7.0 * * @param string $path The normalized file or folder path to determine the block identifier from. * @return string The block identifier, or an empty string if the path is empty. / private static function default_identifier_callback( $path ) { // Ensure $path is not empty to prevent unexpected behavior. if ( empty( $path ) ) { return ''; } if ( str_ends_with( $path, 'block.json' ) ) { // Return the parent directory name if it's a block.json file. return basename( dirname( $path ) ); } // Otherwise, assume it's a directory and return its name. return basename( $path ); } /* * Checks whether the given block metadata collection path is valid against the list of collection roots. * * @since 6.7.2 * * @param string $path Normalized block metadata collection path, without trailing slash. * @param string[] $collection_roots List of normalized collection root paths, without trailing slashes. * @return bool True if the path is allowed, false otherwise. / private static function is_valid_collection_path( $path, $collection_roots ) { foreach ( $collection_roots as $allowed_root ) { // If the path matches any root exactly, it is invalid. if ( $allowed_root === $path ) { return false; } // If the path is a parent path of any of the roots, it is invalid. if ( str_starts_with( $allowed_root, $path ) ) { return false; } } return true; } /* * Gets the default collection root directory paths. * * @since 6.7.2 * * @return string[] List of directory paths within which metadata collections are allowed. */ private static function get_default_collection_roots() { if ( isset( self::$default_collection_roots ) ) { return self::$default_collection_roots; } $collection_roots = array( wp_normalize_path( ABSPATH . WPINC ), wp_normalize_path( WP_CONTENT_DIR ), wp_normalize_path( WPMU_PLUGIN_DIR ), wp_normalize_path( WP_PLUGIN_DIR ), ); $theme_roots = get_theme_roots(); if ( ! is_array( $theme_roots ) ) { $theme_roots = array( $theme_roots ); } foreach ( $theme_roots as $theme_root ) { $collection_roots[] = trailingslashit( wp_normalize_path( WP_CONTENT_DIR ) ) . ltrim( wp_normalize_path( $theme_root ), '/' ); } self::$default_collection_roots = array_unique( $collection_roots ); return self::$default_collection_roots; } }