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dcfea21e26
Props flixos90, gziolo, joemcgill. Fixes #63027. Built from https://develop.svn.wordpress.org/trunk@59938 git-svn-id: http://core.svn.wordpress.org/trunk@59280 1a063a9b-81f0-0310-95a4-ce76da25c4cd
359 lines
12 KiB
PHP
359 lines
12 KiB
PHP
<?php
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/**
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* Block Metadata Registry
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*
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* @package WordPress
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* @subpackage Blocks
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* @since 6.7.0
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*/
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/**
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* Class used for managing block metadata collections.
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*
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* The WP_Block_Metadata_Registry allows plugins to register metadata for large
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* collections of blocks (e.g., 50-100+) using a single PHP file. This approach
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* reduces the need to read and decode multiple `block.json` files, enhancing
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* performance through opcode caching.
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*
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* @since 6.7.0
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*/
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class WP_Block_Metadata_Registry {
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/**
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* Container for storing block metadata collections.
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*
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* Each entry maps a base path to its corresponding metadata and callback.
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*
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* @since 6.7.0
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* @var array<string, array<string, mixed>>
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*/
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private static $collections = array();
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/**
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* Caches the last matched collection path for performance optimization.
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*
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* @since 6.7.0
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* @var string|null
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*/
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private static $last_matched_collection = null;
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/**
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* Stores the default allowed collection root paths.
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*
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* @since 6.7.2
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* @var string[]|null
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*/
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private static $default_collection_roots = null;
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/**
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* Registers a block metadata collection.
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*
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* This method allows registering a collection of block metadata from a single
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* manifest file, improving performance for large sets of blocks.
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*
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* The manifest file should be a PHP file that returns an associative array, where
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* the keys are the block identifiers (without their namespace) and the values are
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* the corresponding block metadata arrays. The block identifiers must match the
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* parent directory name for the respective `block.json` file.
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*
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* Example manifest file structure:
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* ```
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* return array(
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* 'example-block' => array(
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* 'title' => 'Example Block',
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* 'category' => 'widgets',
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* 'icon' => 'smiley',
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* // ... other block metadata
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* ),
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* 'another-block' => array(
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* 'title' => 'Another Block',
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* 'category' => 'formatting',
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* 'icon' => 'star-filled',
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* // ... other block metadata
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* ),
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* // ... more block metadata entries
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* );
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* ```
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*
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* @since 6.7.0
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*
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* @param string $path The absolute base path for the collection ( e.g., WP_PLUGIN_DIR . '/my-plugin/blocks/' ).
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* @param string $manifest The absolute path to the manifest file containing the metadata collection.
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* @return bool True if the collection was registered successfully, false otherwise.
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*/
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public static function register_collection( $path, $manifest ) {
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$path = rtrim( wp_normalize_path( $path ), '/' );
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$collection_roots = self::get_default_collection_roots();
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/**
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* Filters the root directory paths for block metadata collections.
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*
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* Any block metadata collection that is registered must not use any of these paths, or any parent directory
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* path of them. Most commonly, block metadata collections should reside within one of these paths, though in
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* some scenarios they may also reside in entirely different directories (e.g. in case of symlinked plugins).
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*
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* Example:
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* * It is allowed to register a collection with path `WP_PLUGIN_DIR . '/my-plugin'`.
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* * It is not allowed to register a collection with path `WP_PLUGIN_DIR`.
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* * It is not allowed to register a collection with path `dirname( WP_PLUGIN_DIR )`.
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*
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* The default list encompasses the `wp-includes` directory, as well as the root directories for plugins,
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* must-use plugins, and themes. This filter can be used to expand the list, e.g. to custom directories that
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* contain symlinked plugins, so that these root directories cannot be used themselves for a block metadata
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* collection either.
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*
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* @since 6.7.2
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*
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* @param string[] $collection_roots List of allowed metadata collection root paths.
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*/
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$collection_roots = apply_filters( 'wp_allowed_block_metadata_collection_roots', $collection_roots );
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$collection_roots = array_unique(
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array_map(
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static function ( $allowed_root ) {
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return rtrim( wp_normalize_path( $allowed_root ), '/' );
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},
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$collection_roots
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)
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);
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// Check if the path is valid:
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if ( ! self::is_valid_collection_path( $path, $collection_roots ) ) {
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_doing_it_wrong(
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__METHOD__,
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sprintf(
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/* translators: %s: list of allowed collection roots */
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__( 'Block metadata collections cannot be registered as one of the following directories or their parent directories: %s' ),
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esc_html( implode( wp_get_list_item_separator(), $collection_roots ) )
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),
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'6.7.2'
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);
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return false;
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}
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if ( ! file_exists( $manifest ) ) {
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_doing_it_wrong(
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__METHOD__,
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__( 'The specified manifest file does not exist.' ),
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'6.7.0'
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);
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return false;
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}
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self::$collections[ $path ] = array(
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'manifest' => $manifest,
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'metadata' => null,
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);
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return true;
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}
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/**
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* Retrieves block metadata for a given block within a specific collection.
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*
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* This method uses the registered collections to efficiently lookup
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* block metadata without reading individual `block.json` files.
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*
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* @since 6.7.0
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*
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* @param string $file_or_folder The path to the file or folder containing the block.
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* @return array|null The block metadata for the block, or null if not found.
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*/
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public static function get_metadata( $file_or_folder ) {
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$file_or_folder = wp_normalize_path( $file_or_folder );
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$path = self::find_collection_path( $file_or_folder );
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if ( ! $path ) {
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return null;
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}
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$collection = &self::$collections[ $path ];
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if ( null === $collection['metadata'] ) {
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// Load the manifest file if not already loaded
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$collection['metadata'] = require $collection['manifest'];
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}
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// Get the block name from the path.
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$block_name = self::default_identifier_callback( $file_or_folder );
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return isset( $collection['metadata'][ $block_name ] ) ? $collection['metadata'][ $block_name ] : null;
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}
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/**
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* Gets the list of absolute paths to all block metadata files that are part of the given collection.
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*
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* For instance, if a block metadata collection is registered with path `WP_PLUGIN_DIR . '/my-plugin/blocks/'`,
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* and the manifest file includes metadata for two blocks `'block-a'` and `'block-b'`, the result of this method
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* will be an array containing:
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* * `WP_PLUGIN_DIR . '/my-plugin/blocks/block-a/block.json'`
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* * `WP_PLUGIN_DIR . '/my-plugin/blocks/block-b/block.json'`
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*
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* @since 6.8.0
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*
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* @param string $path The absolute base path for a previously registered collection.
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* @return string[] List of block metadata file paths, or an empty array if the given `$path` is invalid.
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*/
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public static function get_collection_block_metadata_files( $path ) {
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$path = rtrim( wp_normalize_path( $path ), '/' );
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if ( ! isset( self::$collections[ $path ] ) ) {
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_doing_it_wrong(
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__METHOD__,
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__( 'No registered block metadata collection was found for the provided path.' ),
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'6.8.0'
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);
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return array();
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}
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$collection = &self::$collections[ $path ];
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if ( null === $collection['metadata'] ) {
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// Load the manifest file if not already loaded.
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$collection['metadata'] = require $collection['manifest'];
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}
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return array_map(
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// No normalization necessary since `$path` is already normalized and `$block_name` is just a folder name.
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static function ( $block_name ) use ( $path ) {
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return "{$path}/{$block_name}/block.json";
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},
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array_keys( $collection['metadata'] )
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);
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}
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/**
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* Finds the collection path for a given file or folder.
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*
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* @since 6.7.0
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*
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* @param string $file_or_folder The normalized path to the file or folder.
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* @return string|null The normalized collection path if found, or null if not found.
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*/
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private static function find_collection_path( $file_or_folder ) {
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if ( empty( $file_or_folder ) ) {
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return null;
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}
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// Check the last matched collection first, since block registration usually happens in batches per plugin or theme.
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$path = rtrim( $file_or_folder, '/' );
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if ( self::$last_matched_collection && str_starts_with( $path, self::$last_matched_collection ) ) {
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return self::$last_matched_collection;
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}
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$collection_paths = array_keys( self::$collections );
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foreach ( $collection_paths as $collection_path ) {
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if ( str_starts_with( $path, $collection_path ) ) {
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self::$last_matched_collection = $collection_path;
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return $collection_path;
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}
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}
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return null;
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}
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/**
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* Checks if metadata exists for a given block name in a specific collection.
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*
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* @since 6.7.0
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*
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* @param string $file_or_folder The path to the file or folder containing the block metadata.
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* @return bool True if metadata exists for the block, false otherwise.
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*/
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public static function has_metadata( $file_or_folder ) {
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return null !== self::get_metadata( $file_or_folder );
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}
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/**
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* Default identifier function to determine the block identifier from a given path.
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*
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* This function extracts the block identifier from the path:
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* - For 'block.json' files, it uses the parent directory name.
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* - For directories, it uses the directory name itself.
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* - For empty paths, it returns an empty string.
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*
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* For example:
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* - Path: '/wp-content/plugins/my-plugin/blocks/example/block.json'
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* Identifier: 'example'
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* - Path: '/wp-content/plugins/my-plugin/blocks/another-block'
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* Identifier: 'another-block'
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*
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* This default behavior matches the standard WordPress block structure.
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*
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* @since 6.7.0
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*
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* @param string $path The normalized file or folder path to determine the block identifier from.
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* @return string The block identifier, or an empty string if the path is empty.
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*/
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private static function default_identifier_callback( $path ) {
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// Ensure $path is not empty to prevent unexpected behavior.
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if ( empty( $path ) ) {
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return '';
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}
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if ( str_ends_with( $path, 'block.json' ) ) {
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// Return the parent directory name if it's a block.json file.
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return basename( dirname( $path ) );
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}
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// Otherwise, assume it's a directory and return its name.
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return basename( $path );
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}
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/**
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* Checks whether the given block metadata collection path is valid against the list of collection roots.
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*
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* @since 6.7.2
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*
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* @param string $path Normalized block metadata collection path, without trailing slash.
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* @param string[] $collection_roots List of normalized collection root paths, without trailing slashes.
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* @return bool True if the path is allowed, false otherwise.
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*/
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private static function is_valid_collection_path( $path, $collection_roots ) {
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foreach ( $collection_roots as $allowed_root ) {
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// If the path matches any root exactly, it is invalid.
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if ( $allowed_root === $path ) {
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return false;
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}
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// If the path is a parent path of any of the roots, it is invalid.
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if ( str_starts_with( $allowed_root, $path ) ) {
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return false;
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}
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}
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return true;
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}
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/**
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* Gets the default collection root directory paths.
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*
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* @since 6.7.2
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*
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* @return string[] List of directory paths within which metadata collections are allowed.
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*/
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private static function get_default_collection_roots() {
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if ( isset( self::$default_collection_roots ) ) {
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return self::$default_collection_roots;
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}
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$collection_roots = array(
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wp_normalize_path( ABSPATH . WPINC ),
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wp_normalize_path( WP_CONTENT_DIR ),
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wp_normalize_path( WPMU_PLUGIN_DIR ),
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wp_normalize_path( WP_PLUGIN_DIR ),
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);
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$theme_roots = get_theme_roots();
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if ( ! is_array( $theme_roots ) ) {
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$theme_roots = array( $theme_roots );
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}
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foreach ( $theme_roots as $theme_root ) {
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$collection_roots[] = trailingslashit( wp_normalize_path( WP_CONTENT_DIR ) ) . ltrim( wp_normalize_path( $theme_root ), '/' );
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}
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self::$default_collection_roots = array_unique( $collection_roots );
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return self::$default_collection_roots;
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}
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}
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