1<?php
  2/**
  3 * Server-side rendering of the `core/latest-comments` block.
  4 *
  5 * @package WordPress
  6 */
  7
  8/**
  9 * Get the post title.
 10 *
 11 * The post title is fetched and if it is blank then a default string is
 12 * returned.
 13 *
 14 * Copied from `wp-admin/includes/template.php`, but we can't include that
 15 * file because:
 16 *
 17 * 1. It causes bugs with test fixture generation and strange Docker 255 error
 18 *    codes.
 19 * 2. It's in the admin; ideally we *shouldn't* be including files from the
 20 *    admin for a block's output. It's a very small/simple function as well,
 21 *    so duplicating it isn't too terrible.
 22 *
 23 * @since 3.3.0
 24 *
 25 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
 26 * @return string The post title if set; "(no title)" if no title is set.
 27 */
 28function wp_latest_comments_draft_or_post_title( $post = 0 ) {
 29	$title = get_the_title( $post );
 30	if ( empty( $title ) ) {
 31		$title = __( '(no title)' );
 32	}
 33	return $title;
 34}
 35
 36/**
 37 * Renders the `core/latest-comments` block on server.
 38 *
 39 * @since 5.1.0
 40 *
 41 * @param array $attributes The block attributes.
 42 *
 43 * @return string Returns the post content with latest comments added.
 44 */
 45function render_block_core_latest_comments( $attributes ) {
 46	$comments = get_comments(
 47		/** This filter is documented in wp-includes/widgets/class-wp-widget-recent-comments.php */
 48		apply_filters(
 49			'widget_comments_args',
 50			array(
 51				'number'      => $attributes['commentsToShow'],
 52				'status'      => 'approve',
 53				'post_status' => 'publish',
 54			),
 55			array()
 56		)
 57	);
 58
 59	$list_items_markup = '';
 60	if ( ! empty( $comments ) ) {
 61		// Prime the cache for associated posts. This is copied from \WP_Widget_Recent_Comments::widget().
 62		$post_ids = array_unique( wp_list_pluck( $comments, 'comment_post_ID' ) );
 63		_prime_post_caches( $post_ids, strpos( get_option( 'permalink_structure' ), '%category%' ), false );
 64
 65		foreach ( $comments as $comment ) {
 66			$list_items_markup .= '<li class="wp-block-latest-comments__comment">';
 67			if ( $attributes['displayAvatar'] ) {
 68				$avatar = get_avatar(
 69					$comment,
 70					48,
 71					'',
 72					'',
 73					array(
 74						'class' => 'wp-block-latest-comments__comment-avatar',
 75					)
 76				);
 77				if ( $avatar ) {
 78					$list_items_markup .= $avatar;
 79				}
 80			}
 81
 82			$list_items_markup .= '<article>';
 83			$list_items_markup .= '<footer class="wp-block-latest-comments__comment-meta">';
 84			$author_url         = get_comment_author_url( $comment );
 85			if ( empty( $author_url ) && ! empty( $comment->user_id ) ) {
 86				$author_url = get_author_posts_url( $comment->user_id );
 87			}
 88
 89			$author_markup = '';
 90			if ( $author_url ) {
 91				$author_markup .= '<a class="wp-block-latest-comments__comment-author" href="' . esc_url( $author_url ) . '">' . get_comment_author( $comment ) . '</a>';
 92			} else {
 93				$author_markup .= '<span class="wp-block-latest-comments__comment-author">' . get_comment_author( $comment ) . '</span>';
 94			}
 95
 96			// `_draft_or_post_title` calls `esc_html()` so we don't need to wrap that call in
 97			// `esc_html`.
 98			$post_title = '<a class="wp-block-latest-comments__comment-link" href="' . esc_url( get_comment_link( $comment ) ) . '">' . wp_latest_comments_draft_or_post_title( $comment->comment_post_ID ) . '</a>';
 99
100			$list_items_markup .= sprintf(
101				/* translators: 1: author name (inside <a> or <span> tag, based on if they have a URL), 2: post title related to this comment */
102				__( '%1$s on %2$s' ),
103				$author_markup,
104				$post_title
105			);
106
107			if ( $attributes['displayDate'] ) {
108				$list_items_markup .= sprintf(
109					'<time datetime="%1$s" class="wp-block-latest-comments__comment-date">%2$s</time>',
110					esc_attr( get_comment_date( 'c', $comment ) ),
111					date_i18n( get_option( 'date_format' ), get_comment_date( 'U', $comment ) )
112				);
113			}
114			$list_items_markup .= '</footer>';
115			if ( $attributes['displayExcerpt'] ) {
116				$list_items_markup .= '<div class="wp-block-latest-comments__comment-excerpt">' . wpautop( get_comment_excerpt( $comment ) ) . '</div>';
117			}
118			$list_items_markup .= '</article></li>';
119		}
120	}
121
122	$classnames = array();
123	if ( $attributes['displayAvatar'] ) {
124		$classnames[] = 'has-avatars';
125	}
126	if ( $attributes['displayDate'] ) {
127		$classnames[] = 'has-dates';
128	}
129	if ( $attributes['displayExcerpt'] ) {
130		$classnames[] = 'has-excerpts';
131	}
132	if ( empty( $comments ) ) {
133		$classnames[] = 'no-comments';
134	}
135	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classnames ) ) );
136
137	return ! empty( $comments ) ? sprintf(
138		'<ol %1$s>%2$s</ol>',
139		$wrapper_attributes,
140		$list_items_markup
141	) : sprintf(
142		'<div %1$s>%2$s</div>',
143		$wrapper_attributes,
144		__( 'No comments to show.' )
145	);
146}
147
148/**
149 * Registers the `core/latest-comments` block.
150 *
151 * @since 5.3.0
152 */
153function register_block_core_latest_comments() {
154	register_block_type_from_metadata(
155		__DIR__ . '/latest-comments',
156		array(
157			'render_callback' => 'render_block_core_latest_comments',
158		)
159	);
160}
161
162add_action( 'init', 'register_block_core_latest_comments' );
163