1<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName // Needed for WP_Block_Cloner helper class.
  2/**
  3 * Server-side rendering of the `core/block` block.
  4 *
  5 * @package WordPress
  6 */
  7
  8/**
  9 * Renders the `core/block` block on server.
 10 *
 11 * @since 5.0.0
 12 *
 13 * @global WP_Embed $wp_embed
 14 *
 15 * @param array $attributes The block attributes.
 16 *
 17 * @return string Rendered HTML of the referenced block.
 18 */
 19function render_block_core_block( $attributes, $content, $block_instance ) {
 20	static $seen_refs = array();
 21
 22	if ( empty( $attributes['ref'] ) ) {
 23		return '';
 24	}
 25
 26	$reusable_block = get_post( $attributes['ref'] );
 27	if ( ! $reusable_block || 'wp_block' !== $reusable_block->post_type ) {
 28		return '';
 29	}
 30
 31	if ( isset( $seen_refs[ $attributes['ref'] ] ) ) {
 32		// WP_DEBUG_DISPLAY must only be honored when WP_DEBUG. This precedent
 33		// is set in `wp_debug_mode()`.
 34		$is_debug = WP_DEBUG && WP_DEBUG_DISPLAY;
 35
 36		return $is_debug ?
 37			// translators: Visible only in the front end, this warning takes the place of a faulty block.
 38			__( '[block rendering halted]' ) :
 39			'';
 40	}
 41
 42	if ( 'publish' !== $reusable_block->post_status || ! empty( $reusable_block->post_password ) ) {
 43		return '';
 44	}
 45
 46	$seen_refs[ $attributes['ref'] ] = true;
 47
 48	// Handle embeds for reusable blocks.
 49	global $wp_embed;
 50	$content = $wp_embed->run_shortcode( $reusable_block->post_content );
 51	$content = $wp_embed->autoembed( $content );
 52
 53	// Back compat.
 54	// For blocks that have not been migrated in the editor, add some back compat
 55	// so that front-end rendering continues to work.
 56
 57	// This matches the `v2` deprecation. Removes the inner `values` property
 58	// from every item.
 59	if ( isset( $attributes['content'] ) ) {
 60		foreach ( $attributes['content'] as &$content_data ) {
 61			if ( isset( $content_data['values'] ) ) {
 62				$is_assoc_array = is_array( $content_data['values'] ) && ! wp_is_numeric_array( $content_data['values'] );
 63
 64				if ( $is_assoc_array ) {
 65					$content_data = $content_data['values'];
 66				}
 67			}
 68		}
 69	}
 70
 71	// This matches the `v1` deprecation. Rename `overrides` to `content`.
 72	if ( isset( $attributes['overrides'] ) && ! isset( $attributes['content'] ) ) {
 73		$attributes['content'] = $attributes['overrides'];
 74	}
 75
 76	// Apply Block Hooks.
 77	$content = apply_block_hooks_to_content_from_post_object( $content, $reusable_block );
 78
 79	/**
 80	 * We attach the blocks from $content as inner blocks to the Synced Pattern block instance.
 81	 * This ensures that block context available to the Synced Pattern block instance is provided to
 82	 * those blocks.
 83	 */
 84	$block_instance->parsed_block['innerBlocks']  = parse_blocks( $content );
 85	$block_instance->parsed_block['innerContent'] = array_fill( 0, count( $block_instance->parsed_block['innerBlocks'] ), null );
 86	if ( method_exists( $block_instance, 'refresh_context_dependents' ) ) {
 87		// WP_Block::refresh_context_dependents() was introduced in WordPress 6.8.
 88		$block_instance->refresh_context_dependents();
 89	} else {
 90		// This branch can be removed once Gutenberg requires WordPress 6.8 or later.
 91		if ( ! class_exists( 'WP_Block_Cloner' ) ) {
 92			// phpcs:ignore Gutenberg.Commenting.SinceTag.MissingClassSinceTag
 93			class WP_Block_Cloner extends WP_Block {
 94				/**
 95				 * Static methods of subclasses have access to protected properties
 96				 * of instances of the parent class.
 97				 * In this case, this gives us access to `available_context` and `registry`.
 98				 */
 99				// phpcs:ignore Gutenberg.Commenting.SinceTag.MissingMethodSinceTag
100				public static function clone_instance( $instance ) {
101					return new WP_Block(
102						$instance->parsed_block,
103						$instance->available_context,
104						$instance->registry
105					);
106				}
107			}
108		}
109		$block_instance = WP_Block_Cloner::clone_instance( $block_instance );
110	}
111
112	$content = $block_instance->render( array( 'dynamic' => false ) );
113	unset( $seen_refs[ $attributes['ref'] ] );
114
115	return $content;
116}
117
118/**
119 * Registers the `core/block` block.
120 *
121 * @since 5.3.0
122 */
123function register_block_core_block() {
124	register_block_type_from_metadata(
125		__DIR__ . '/block',
126		array(
127			'render_callback' => 'render_block_core_block',
128		)
129	);
130}
131add_action( 'init', 'register_block_core_block' );
132