1<?php
2
3/**
4 * Server-side rendering of the `core/accordion-item` block.
5 *
6 * @package WordPress
7 * @since 6.9.0
8 *
9 * @param array $attributes The block attributes.
10 * @param string $content The block content.
11 *
12 * @return string Returns the updated markup.
13 */
14function block_core_accordion_item_render( $attributes, $content ) {
15 if ( ! $content ) {
16 return $content;
17 }
18
19 $p = new WP_HTML_Tag_Processor( $content );
20 $unique_id = wp_unique_id( 'accordion-item-' );
21
22 // Initialize the state of the item on the server using a closure,
23 // since we need to get derived state based on the current context.
24 wp_interactivity_state(
25 'core/accordion',
26 array(
27 'isOpen' => function () {
28 $context = wp_interactivity_get_context();
29 return $context['openByDefault'];
30 },
31 )
32 );
33
34 if ( $p->next_tag( array( 'class_name' => 'wp-block-accordion-item' ) ) ) {
35 $open_by_default = $attributes['openByDefault'] ? 'true' : 'false';
36 $p->set_attribute( 'data-wp-context', '{ "id": "' . $unique_id . '", "openByDefault": ' . $open_by_default . ' }' );
37 $p->set_attribute( 'data-wp-class--is-open', 'state.isOpen' );
38 $p->set_attribute( 'data-wp-init', 'callbacks.initAccordionItems' );
39 $p->set_attribute( 'data-wp-on-window--hashchange', 'callbacks.hashChange' );
40
41 if ( $p->next_tag( array( 'class_name' => 'wp-block-accordion-heading__toggle' ) ) ) {
42 $p->set_attribute( 'data-wp-on--click', 'actions.toggle' );
43 $p->set_attribute( 'data-wp-on--keydown', 'actions.handleKeyDown' );
44 $p->set_attribute( 'id', $unique_id );
45 $p->set_attribute( 'aria-controls', $unique_id . '-panel' );
46 $p->set_attribute( 'data-wp-bind--aria-expanded', 'state.isOpen' );
47
48 if ( $p->next_tag( array( 'class_name' => 'wp-block-accordion-panel' ) ) ) {
49 $p->set_attribute( 'id', $unique_id . '-panel' );
50 $p->set_attribute( 'aria-labelledby', $unique_id );
51 $p->set_attribute( 'data-wp-bind--inert', '!state.isOpen' );
52
53 // Only modify content if all directives have been set.
54 $content = $p->get_updated_html();
55 }
56 }
57 }
58
59 return $content;
60}
61
62/**
63 * Registers the `core/accordion-item` block on server.
64 *
65 * @since 6.9.0
66 */
67function register_block_core_accordion_item() {
68 register_block_type_from_metadata(
69 __DIR__ . '/accordion-item',
70 array(
71 'render_callback' => 'block_core_accordion_item_render',
72 )
73 );
74}
75add_action( 'init', 'register_block_core_accordion_item' );
76