Implement a mechanism to register all block types from a block metadata collection

src/wp-includes/blocks.php

@@ -375,6 +375,32 @@ function get_block_metadata_i18n_schema() {
 	return $i18n_block_schema;
 }
 
+/**
+ * Registers all block types from a block metadata collection.
+ *
+ * This can either reference a previously registered metadata collection or, if the `$manifest` parameter is provided,
+ * register the metadata collection directly within the same function call.
+ *
+ * @since 6.8.0
+ * @see wp_register_block_metadata_collection()
+ * @see register_block_type_from_metadata()
+ *
+ * @param string $path     The absolute base path for the collection ( e.g., WP_PLUGIN_DIR . '/my-plugin/blocks/' ).
+ * @param string $manifest Optional. The absolute path to the manifest file containing the metadata collection, in
+ *                         order to register the collection. If this parameter is not provided, the `$path` parameter
+ *                         must reference a previously registered block metadata collection.
+ */
+function wp_register_block_types_from_metadata_collection( $path, $manifest = '' ) {
+	if ( $manifest ) {
+		wp_register_block_metadata_collection( $path, $manifest );
+	}
+
+	$block_metadata_files = WP_Block_Metadata_Registry::get_collection_block_metadata_files( $path );
+	foreach ( $block_metadata_files as $block_metadata_file ) {
+		register_block_type_from_metadata( $block_metadata_file );
+	}
+}
+
 /**
  * Registers a block metadata collection.
  *

src/wp-includes/class-wp-block-metadata-registry.php

@@ -166,6 +166,47 @@ public static function get_metadata( $file_or_folder ) {
 		return isset( $collection['metadata'][ $block_name ] ) ? $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 = wp_normalize_path( rtrim( $path, '/' ) );
+
+		if ( ! isset( self::$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(
+			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.
 	 *

tests/phpunit/tests/blocks/wpBlockMetadataRegistry.php

@@ -4,6 +4,7 @@
  * Tests for WP_Block_Metadata_Registry class.
  *
  * @group blocks
+ * @coversDefaultClass WP_Block_Metadata_Registry
  */
 class Tests_Blocks_WpBlockMetadataRegistry extends WP_UnitTestCase {
 
@@ -88,4 +89,35 @@ public function test_register_collection_with_non_existent_path() {
 		$result = WP_Block_Metadata_Registry::register_collection( $non_existent_path, $this->temp_manifest_file );
 		$this->assertFalse( $result, 'Non-existent path should not be registered' );
 	}
+
+	/**
+	 * Tests that the `get_collection_block_metadata_files()` method returns the expected list of block metadata files.
+	 *
+	 * @ticket 62267
+	 * @covers ::get_collection_block_metadata_files
+	 */
+	public function test_get_collection_block_metadata_files() {
+		$path          = WP_PLUGIN_DIR . '/test-plugin/data/block-types';
+		$manifest_data = array(
+			'a-block'       => array(
+				'name'  => 'a-block',
+				'title' => 'A Block',
+			),
+			'another-block' => array(
+				'name'  => 'another-block',
+				'title' => 'Another Block',
+			),
+		);
+
+		file_put_contents( $this->temp_manifest_file, '<?php return ' . var_export( $manifest_data, true ) . ';' );
+
+		$this->assertTrue( WP_Block_Metadata_Registry::register_collection( $path, $this->temp_manifest_file ) );
+		$this->assertSame(
+			array(
+				WP_PLUGIN_DIR . '/test-plugin/data/block-types/a-block/block.json',
+				WP_PLUGIN_DIR . '/test-plugin/data/block-types/another-block/block.json',
+			),
+			WP_Block_Metadata_Registry::get_collection_block_metadata_files( $path )
+		);
+	}
 }