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<?php/**
 * Server-side rendering of the `core/latest-comments` block.
 *
 * @package WordPress
 */
 
 /**
 * Get the post title.
 *
 * The post title is fetched and if it is blank then a default string is
 * returned.
 *
 * Copied from `wp-admin/includes/template.php`, but we can't include that
 * file because:
 *
 * 1. It causes bugs with test fixture generation and strange Docker 255 error
 *    codes.
 * 2. It's in the admin; ideally we *shouldn't* be including files from the
 *    admin for a block's output. It's a very small/simple function as well,
 *    so duplicating it isn't too terrible.
 *
 * @since 3.3.0
 *
 * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.
 * @return string The post title if set; "(no title)" if no title is set.
 */
 function wp_latest_comments_draft_or_post_title( $post = 0 ) {
 $title = get_the_title( $post );
 if ( empty( $title ) ) {
 $title = __( '(no title)' );
 }
 return $title;
 }
 
 /**
 * Renders the `core/latest-comments` block on server.
 *
 * @since 5.1.0
 *
 * @param array $attributes The block attributes.
 *
 * @return string Returns the post content with latest comments added.
 */
 function render_block_core_latest_comments( $attributes = array() ) {
 $comments = get_comments(
 /** This filter is documented in wp-includes/widgets/class-wp-widget-recent-comments.php */
 apply_filters(
 'widget_comments_args',
 array(
 'number'      => $attributes['commentsToShow'],
 'status'      => 'approve',
 'post_status' => 'publish',
 ),
 array()
 )
 );
 
 $list_items_markup = '';
 if ( ! empty( $comments ) ) {
 // Prime the cache for associated posts. This is copied from \WP_Widget_Recent_Comments::widget().
 $post_ids = array_unique( wp_list_pluck( $comments, 'comment_post_ID' ) );
 _prime_post_caches( $post_ids, strpos( get_option( 'permalink_structure' ), '%category%' ), false );
 
 foreach ( $comments as $comment ) {
 $list_items_markup .= '<li class="wp-block-latest-comments__comment">';
 if ( $attributes['displayAvatar'] ) {
 $avatar = get_avatar(
 $comment,
 48,
 '',
 '',
 array(
 'class' => 'wp-block-latest-comments__comment-avatar',
 )
 );
 if ( $avatar ) {
 $list_items_markup .= $avatar;
 }
 }
 
 $list_items_markup .= '<article>';
 $list_items_markup .= '<footer class="wp-block-latest-comments__comment-meta">';
 $author_url         = get_comment_author_url( $comment );
 if ( empty( $author_url ) && ! empty( $comment->user_id ) ) {
 $author_url = get_author_posts_url( $comment->user_id );
 }
 
 $author_markup = '';
 if ( $author_url ) {
 $author_markup .= '<a class="wp-block-latest-comments__comment-author" href="' . esc_url( $author_url ) . '">' . get_comment_author( $comment ) . '</a>';
 } else {
 $author_markup .= '<span class="wp-block-latest-comments__comment-author">' . get_comment_author( $comment ) . '</span>';
 }
 
 // `_draft_or_post_title` calls `esc_html()` so we don't need to wrap that call in
 // `esc_html`.
 $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>';
 
 $list_items_markup .= sprintf(
 /* translators: 1: author name (inside <a> or <span> tag, based on if they have a URL), 2: post title related to this comment */
 __( '%1$s on %2$s' ),
 $author_markup,
 $post_title
 );
 
 if ( $attributes['displayDate'] ) {
 $list_items_markup .= sprintf(
 '<time datetime="%1$s" class="wp-block-latest-comments__comment-date">%2$s</time>',
 esc_attr( get_comment_date( 'c', $comment ) ),
 date_i18n( get_option( 'date_format' ), get_comment_date( 'U', $comment ) )
 );
 }
 $list_items_markup .= '</footer>';
 if ( $attributes['displayExcerpt'] ) {
 $list_items_markup .= '<div class="wp-block-latest-comments__comment-excerpt">' . wpautop( get_comment_excerpt( $comment ) ) . '</div>';
 }
 $list_items_markup .= '</article></li>';
 }
 }
 
 $classnames = array();
 if ( $attributes['displayAvatar'] ) {
 $classnames[] = 'has-avatars';
 }
 if ( $attributes['displayDate'] ) {
 $classnames[] = 'has-dates';
 }
 if ( $attributes['displayExcerpt'] ) {
 $classnames[] = 'has-excerpts';
 }
 if ( empty( $comments ) ) {
 $classnames[] = 'no-comments';
 }
 $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classnames ) ) );
 
 return ! empty( $comments ) ? sprintf(
 '<ol %1$s>%2$s</ol>',
 $wrapper_attributes,
 $list_items_markup
 ) : sprintf(
 '<div %1$s>%2$s</div>',
 $wrapper_attributes,
 __( 'No comments to show.' )
 );
 }
 
 /**
 * Registers the `core/latest-comments` block.
 *
 * @since 5.3.0
 */
 function register_block_core_latest_comments() {
 register_block_type_from_metadata(
 __DIR__ . '/latest-comments',
 array(
 'render_callback' => 'render_block_core_latest_comments',
 )
 );
 }
 
 add_action( 'init', 'register_block_core_latest_comments' );
 
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