<?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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