1<?php
2/**
3 * Server-side rendering of the `core/post-comments-form` block.
4 *
5 * @package WordPress
6 */
7
8/**
9 * Renders the `core/post-comments-form` block on the server.
10 *
11 * @since 6.0.0
12 *
13 * @param array $attributes Block attributes.
14 * @param string $content Block default content.
15 * @param WP_Block $block Block instance.
16 * @return string Returns the filtered post comments form for the current post.
17 */
18function render_block_core_post_comments_form( $attributes, $content, $block ) {
19 if ( ! isset( $block->context['postId'] ) ) {
20 return '';
21 }
22
23 if ( post_password_required( $block->context['postId'] ) ) {
24 return;
25 }
26
27 $classes = array( 'comment-respond' ); // See comment further below.
28 if ( isset( $attributes['textAlign'] ) ) {
29 $classes[] = 'has-text-align-' . $attributes['textAlign'];
30 }
31 if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
32 $classes[] = 'has-link-color';
33 }
34 $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ) ) );
35
36 add_filter( 'comment_form_defaults', 'post_comments_form_block_form_defaults' );
37
38 ob_start();
39 comment_form( array(), $block->context['postId'] );
40 $form = ob_get_clean();
41
42 remove_filter( 'comment_form_defaults', 'post_comments_form_block_form_defaults' );
43
44 // We use the outermost wrapping `<div />` returned by `comment_form()`
45 // which is identified by its default classname `comment-respond` to inject
46 // our wrapper attributes. This way, it is guaranteed that all styling applied
47 // to the block is carried along when the comment form is moved to the location
48 // of the 'Reply' link that the user clicked by Core's `comment-reply.js` script.
49 $form = str_replace( 'class="comment-respond"', $wrapper_attributes, $form );
50
51 // Enqueue the comment-reply script.
52 wp_enqueue_script( 'comment-reply' );
53
54 return $form;
55}
56
57/**
58 * Registers the `core/post-comments-form` block on the server.
59 *
60 * @since 6.0.0
61 */
62function register_block_core_post_comments_form() {
63 register_block_type_from_metadata(
64 __DIR__ . '/post-comments-form',
65 array(
66 'render_callback' => 'render_block_core_post_comments_form',
67 )
68 );
69}
70add_action( 'init', 'register_block_core_post_comments_form' );
71
72/**
73 * Use the button block classes for the form-submit button.
74 *
75 * @since 6.0.0
76 *
77 * @param array $fields The default comment form arguments.
78 *
79 * @return array Returns the modified fields.
80 */
81function post_comments_form_block_form_defaults( $fields ) {
82 if ( wp_is_block_theme() ) {
83 $fields['submit_button'] = '<input name="%1$s" type="submit" id="%2$s" class="wp-block-button__link ' . wp_theme_get_element_class_name( 'button' ) . '" value="%4$s" />';
84 $fields['submit_field'] = '<p class="form-submit wp-block-button">%1$s %2$s</p>';
85 }
86
87 return $fields;
88}
89