gutenberg / build / scripts / block-library / comments.php

comments.php in Gutenberg 22.9.0, at build/scripts/block-library/comments.php

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1	<?php
2	/**
3	* Server-side rendering of the `core/comments` block.
4	*
5	* @package WordPress
6	*/
7
8	/**
9	* Renders the `core/comments` block on the server.
10	*
11	* This render callback is mainly for rendering a dynamic, legacy version of
12	* this block (the old `core/post-comments`). It uses the `comments_template()`
13	* function to generate the output, in the same way as classic PHP themes.
14	*
15	* As this callback will always run during SSR, first we need to check whether
16	* the block is in legacy mode. If not, the HTML generated in the editor is
17	* returned instead.
18	*
19	* @since 6.1.0
20	*
21	* @global WP_Post $post Global post object.
22	*
23	* @param array $attributes Block attributes.
24	* @param string $content Block default content.
25	* @param WP_Block $block Block instance.
26	* @return string Returns the filtered post comments for the current post wrapped inside "p" tags.
27	*/
28	function gutenberg_render_block_core_comments( $attributes, $content, $block ) {
29	global $post;
30
31	if ( ! isset( $block->context['postId'] ) ) {
32	return '';
33	}
34
35	$post_id = $block->context['postId'];
36	// Return early if there are no comments and comments are closed.
37	if ( ! comments_open( $post_id ) && (int) get_comments_number( $post_id ) === 0 ) {
38	return '';
39	}
40
41	// If this isn't the legacy block, we need to render the static version of this block.
42	$is_legacy = 'core/post-comments' === $block->name \|\| ! empty( $attributes['legacy'] );
43	if ( ! $is_legacy ) {
44	return $block->render( array( 'dynamic' => false ) );
45	}
46
47	$post_before = $post;
48	$post = get_post( $post_id );
49	setup_postdata( $post );
50
51	ob_start();
52
53	/*
54	* There's a deprecation warning generated by WP Core.
55	* Ideally this deprecation is removed from Core.
56	* In the meantime, this removes it from the output.
57	*/
58	add_filter( 'deprecated_file_trigger_error', '__return_false' );
59	comments_template();
60	remove_filter( 'deprecated_file_trigger_error', '__return_false' );
61
62	$output = ob_get_clean();
63	$post = $post_before;
64
65	$classnames = array();
66	// Adds the old class name for styles' backwards compatibility.
67	if ( isset( $attributes['legacy'] ) ) {
68	$classnames[] = 'wp-block-post-comments';
69	}
70	if ( isset( $attributes['textAlign'] ) ) {
71	$classnames[] = 'has-text-align-' . $attributes['textAlign'];
72	}
73
74	$wrapper_attributes = get_block_wrapper_attributes(
75	array( 'class' => implode( ' ', $classnames ) )
76	);
77
78	/*
79	* Enqueues scripts and styles required only for the legacy version. That is
80	* why they are not defined in `block.json`.
81	*/
82	wp_enqueue_script( 'comment-reply' );
83	gutenberg_enqueue_legacy_post_comments_block_styles( $block->name );
84
85	return sprintf( '<div %1$s>%2$s</div>', $wrapper_attributes, $output );
86	}
87
88	/**
89	* Registers the `core/comments` block on the server.
90	*
91	* @since 6.1.0
92	*/
93	function gutenberg_register_block_core_comments() {
94	register_block_type_from_metadata(
95	__DIR__ . '/comments',
96	array(
97	'render_callback' => 'gutenberg_render_block_core_comments',
98	'skip_inner_blocks' => true,
99	)
100	);
101	}
102	add_action( 'init', 'gutenberg_register_block_core_comments', 20 );
103
104	/**
105	* Use the button block classes for the form-submit button.
106	*
107	* @since 6.1.0
108	*
109	* @param array $fields The default comment form arguments.
110	*
111	* @return array Returns the modified fields.
112	*/
113	function gutenberg_comments_block_form_defaults( $fields ) {
114	if ( wp_is_block_theme() ) {
115	$fields['submit_button'] = '<input name="%1$s" type="submit" id="%2$s" class="%3$s wp-block-button__link ' . wp_theme_get_element_class_name( 'button' ) . '" value="%4$s" />';
116	$fields['submit_field'] = '<p class="form-submit wp-block-button">%1$s %2$s</p>';
117	}
118
119	return $fields;
120	}
121	add_filter( 'comment_form_defaults', 'gutenberg_comments_block_form_defaults' );
122
123	/**
124	* Enqueues styles from the legacy `core/post-comments` block. These styles are
125	* required only by the block's fallback.
126	*
127	* @since 6.1.0
128	*
129	* @param string $block_name Name of the new block type.
130	*/
131	function gutenberg_enqueue_legacy_post_comments_block_styles( $block_name ) {
132	static $are_styles_enqueued = false;
133
134	if ( ! $are_styles_enqueued ) {
135	$handles = array(
136	'wp-block-post-comments',
137	'wp-block-buttons',
138	'wp-block-button',
139	);
140	foreach ( $handles as $handle ) {
141	wp_enqueue_block_style( $block_name, array( 'handle' => $handle ) );
142	}
143	$are_styles_enqueued = true;
144	}
145	}
146
147	/**
148	* Ensures backwards compatibility for any users running the Gutenberg plugin
149	* who have used Post Comments before it was merged into Comments Query Loop.
150	*
151	* The same approach was followed when core/query-loop was renamed to
152	* core/post-template.
153	*
154	* @since 6.1.0
155	*
156	* @see https://github.com/WordPress/gutenberg/pull/41807
157	* @see https://github.com/WordPress/gutenberg/pull/32514
158	*/
159	function gutenberg_register_legacy_post_comments_block() {
160	$registry = WP_Block_Type_Registry::get_instance();
161
162	/*
163	* Remove the old `post-comments` block if it was already registered, as it
164	* is about to be replaced by the type defined below.
165	*/
166	if ( $registry->is_registered( 'core/post-comments' ) ) {
167	unregister_block_type( 'core/post-comments' );
168	}
169
170	// Recreate the legacy block metadata.
171	$metadata = array(
172	'name' => 'core/post-comments',
173	'category' => 'theme',
174	'attributes' => array(
175	'textAlign' => array(
176	'type' => 'string',
177	),
178	),
179	'uses_context' => array(
180	'postId',
181	'postType',
182	),
183	'supports' => array(
184	'html' => false,
185	'align' => array( 'wide', 'full' ),
186	'typography' => array(
187	'fontSize' => true,
188	'lineHeight' => true,
189	'__experimentalFontStyle' => true,
190	'__experimentalFontWeight' => true,
191	'__experimentalLetterSpacing' => true,
192	'__experimentalTextTransform' => true,
193	'__experimentalDefaultControls' => array(
194	'fontSize' => true,
195	),
196	),
197	'color' => array(
198	'gradients' => true,
199	'link' => true,
200	'__experimentalDefaultControls' => array(
201	'background' => true,
202	'text' => true,
203	),
204	),
205	'inserter' => false,
206	),
207	'style' => array(
208	'wp-block-post-comments',
209	'wp-block-buttons',
210	'wp-block-button',
211	),
212	'render_callback' => 'gutenberg_render_block_core_comments',
213	'skip_inner_blocks' => true,
214	);
215
216	/*
217	* Filters the metadata object, the same way it's done inside
218	* `register_block_type_from_metadata()`. This applies some default filters,
219	* like `_wp_multiple_block_styles`, which is required in this case because
220	* the block has multiple styles.
221	*/
222	/** This filter is documented in wp-includes/blocks.php */
223	$metadata = apply_filters( 'block_type_metadata', $metadata );
224
225	register_block_type( 'core/post-comments', $metadata );
226	}
227	add_action( 'init', 'gutenberg_register_legacy_post_comments_block', 21 );
228