Fix md5 class messed up with new block key

lib/experimental/interactivity-api/class-wp-directive-processor.php

@@ -17,6 +17,37 @@
  * to improve this code.
  */
 class WP_Directive_Processor extends WP_HTML_Tag_Processor {
+
+	/**
+	 * An array of root blocks.
+	 *
+	 * @var array
+	 */
+	static $root_blocks = array();
+
+	/**
+	 * Add a root block to the list.
+	 *
+	 * @param array $block The block to add.
+	 *
+	 * @return void
+	 */
+	public static function add_root_block( $block ) {
+			self::$root_blocks[] = md5( serialize( $block ) );
+	}
+
+	/**
+	 * Check if block is a root block.
+	 *
+	 * @param array $block The block to check.
+	 *
+	 * @return bool True if block is a root block, false otherwise.
+	 */
+	public static function is_root_block( $block ) {
+			return in_array( md5( serialize( $block ) ), self::$root_blocks, true );
+	}
+
+
 	/**
 	 * Find the matching closing tag for an opening tag.
 	 *

lib/experimental/interactivity-api/directive-processing.php

@@ -17,7 +17,7 @@
  */
 function gutenberg_interactivity_process_directives_in_root_blocks( $block_content, $block ) {
 	// Don't process inner blocks or root blocks that don't contain directives.
-	if ( isset( $block['is_inner_block'] ) || strpos( $block_content, 'data-wp-' ) === false ) {
+	if ( ! WP_Directive_Processor::is_root_block( $block ) || strpos( $block_content, 'data-wp-' ) === false ) {
 		return $block_content;
 	}
 
@@ -47,8 +47,8 @@ function gutenberg_interactivity_process_directives_in_root_blocks( $block_conte
  * @return array The parsed block.
  */
 function gutenberg_interactivity_mark_inner_blocks( $parsed_block, $source_block, $parent_block ) {
-	if ( isset( $parent_block ) ) {
-		$parsed_block['is_inner_block'] = true;
+	if ( ! isset( $parent_block ) ) {
+		WP_Directive_Processor::add_root_block( $parsed_block );
 	}
 	return $parsed_block;
 }