1<?php
2/**
3 * Server-side rendering of the `core/pattern` block.
4 *
5 * @package WordPress
6 */
7
8/**
9 * Registers the `core/pattern` block on the server.
10 *
11 * @since 5.9.0
12 */
13function register_block_core_pattern() {
14 register_block_type_from_metadata(
15 __DIR__ . '/pattern',
16 array(
17 'render_callback' => 'render_block_core_pattern',
18 )
19 );
20}
21
22/**
23 * Renders the `core/pattern` block on the server.
24 *
25 * @since 6.3.0 Backwards compatibility: blocks with no `syncStatus` attribute do not receive block wrapper.
26 *
27 * @global WP_Embed $wp_embed Used to process embedded content within patterns
28 *
29 * @param array $attributes Block attributes.
30 *
31 * @return string Returns the output of the pattern.
32 */
33function render_block_core_pattern( $attributes ) {
34 static $seen_refs = array();
35
36 if ( empty( $attributes['slug'] ) ) {
37 return '';
38 }
39
40 $slug = $attributes['slug'];
41 $registry = WP_Block_Patterns_Registry::get_instance();
42
43 if ( ! $registry->is_registered( $slug ) ) {
44 return '';
45 }
46
47 if ( isset( $seen_refs[ $attributes['slug'] ] ) ) {
48 // WP_DEBUG_DISPLAY must only be honored when WP_DEBUG. This precedent
49 // is set in `wp_debug_mode()`.
50 $is_debug = WP_DEBUG && WP_DEBUG_DISPLAY;
51
52 return $is_debug ?
53 // translators: Visible only in the front end, this warning takes the place of a faulty block. %s represents a pattern's slug.
54 sprintf( __( '[block rendering halted for pattern "%s"]' ), $slug ) :
55 '';
56 }
57
58 $pattern = $registry->get_registered( $slug );
59 $content = $pattern['content'];
60
61 $seen_refs[ $attributes['slug'] ] = true;
62
63 $content = do_blocks( $content );
64
65 global $wp_embed;
66 $content = $wp_embed->autoembed( $content );
67
68 unset( $seen_refs[ $attributes['slug'] ] );
69 return $content;
70}
71
72add_action( 'init', 'register_block_core_pattern' );
73