274 lines
8.2 KiB
PHP
274 lines
8.2 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 WordPress 'wp-includes' directory path.
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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 $wpinc_dir = null;
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/**
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* Stores the normalized WordPress plugin directory path.
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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 $plugin_dir = 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 = wp_normalize_path( rtrim( $path, '/' ) );
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$wpinc_dir = self::get_wpinc_dir();
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$plugin_dir = self::get_plugin_dir();
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// Check if the path is valid:
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if ( str_starts_with( $path, $plugin_dir ) ) {
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// For plugins, ensure the path is within a specific plugin directory and not the base plugin directory.
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$relative_path = substr( $path, strlen( $plugin_dir ) + 1 );
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$plugin_name = strtok( $relative_path, '/' );
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if ( empty( $plugin_name ) || $plugin_name === $relative_path ) {
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_doing_it_wrong(
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__METHOD__,
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__( 'Block metadata collections can only be registered for a specific plugin. The provided path is neither a core path nor a valid plugin path.' ),
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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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} elseif ( ! str_starts_with( $path, $wpinc_dir ) ) {
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// If it's neither a plugin directory path nor within 'wp-includes', the path is invalid.
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_doing_it_wrong(
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__METHOD__,
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__( 'Block metadata collections can only be registered for a specific plugin. The provided path is neither a core path nor a valid plugin path.' ),
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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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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( $file_or_folder ) {
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$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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* 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 path to the file or folder.
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* @return string|null The 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 = wp_normalize_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 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( $path );
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}
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/**
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* Gets the WordPress 'wp-includes' directory path.
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*
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* @since 6.7.0
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*
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* @return string The WordPress 'wp-includes' directory path.
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*/
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private static function get_wpinc_dir() {
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if ( ! isset( self::$wpinc_dir ) ) {
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self::$wpinc_dir = wp_normalize_path( ABSPATH . WPINC );
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}
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return self::$wpinc_dir;
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}
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/**
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* Gets the normalized WordPress plugin directory path.
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*
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* @since 6.7.0
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*
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* @return string The normalized WordPress plugin directory path.
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*/
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private static function get_plugin_dir() {
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if ( ! isset( self::$plugin_dir ) ) {
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self::$plugin_dir = wp_normalize_path( WP_PLUGIN_DIR );
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}
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return self::$plugin_dir;
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}
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}
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