<?php

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/**

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* Server-side rendering of the `core/latest-comments` block.

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*

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* @package WordPress

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*/

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/**

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* Get the post title.

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*

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* The post title is fetched and if it is blank then a default string is

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* returned.

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*

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* Copied from `wp-admin/includes/template.php`, but we can't include that

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* file because:

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*

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* 1. It causes bugs with test fixture generation and strange Docker 255 error

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* codes.

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* 2. It's in the admin; ideally we *shouldn't* be including files from the

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* admin for a block's output. It's a very small/simple function as well,

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* so duplicating it isn't too terrible.

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*

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* @since 3.3.0

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*

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* @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post.

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* @return string The post title if set; "(no title)" if no title is set.

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*/

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function wp_latest_comments_draft_or_post_title( $post = 0 ) {

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$title = get_the_title( $post );

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if ( empty( $title ) ) {

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$title = __( '(no title)' );

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}

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return esc_html( $title );

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}

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/**

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* Renders the `core/latest-comments` block on server.

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*

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* @param array $attributes The block attributes.

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*

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* @return string Returns the post content with latest comments added.

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*/

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function render_block_core_latest_comments( $attributes = array() ) {

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$comments = get_comments(

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// This filter is documented in wp-includes/widgets/class-wp-widget-recent-comments.php.

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apply_filters(

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'widget_comments_args',

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array(

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'number' => $attributes['commentsToShow'],

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'status' => 'approve',

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'post_status' => 'publish',

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)

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)

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);

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$list_items_markup = '';

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if ( ! empty( $comments ) ) {

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// Prime the cache for associated posts. This is copied from \WP_Widget_Recent_Comments::widget().

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$post_ids = array_unique( wp_list_pluck( $comments, 'comment_post_ID' ) );

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_prime_post_caches( $post_ids, strpos( get_option( 'permalink_structure' ), '%category%' ), false );

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foreach ( $comments as $comment ) {

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$list_items_markup .= '<li class="wp-block-latest-comments__comment">';

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if ( $attributes['displayAvatar'] ) {

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$avatar = get_avatar(

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$comment,

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48,

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'',

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'',

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array(

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'class' => 'wp-block-latest-comments__comment-avatar',

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)

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);

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if ( $avatar ) {

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$list_items_markup .= $avatar;

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}

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}

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$list_items_markup .= '<article>';

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$list_items_markup .= '<footer class="wp-block-latest-comments__comment-meta">';

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$author_url = get_comment_author_url( $comment );

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if ( empty( $author_url ) && ! empty( $comment->user_id ) ) {

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$author_url = get_author_posts_url( $comment->user_id );

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}

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$author_markup = '';

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if ( $author_url ) {

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$author_markup .= '<a class="wp-block-latest-comments__comment-author" href="' . esc_url( $author_url ) . '">' . get_comment_author( $comment ) . '</a>';

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} else {

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$author_markup .= '<span class="wp-block-latest-comments__comment-author">' . get_comment_author( $comment ) . '</span>';

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}

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// `_draft_or_post_title` calls `esc_html()` so we don't need to wrap that call in

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// `esc_html`.

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$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>';

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$list_items_markup .= sprintf(

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/* translators: 1: author name (inside <a> or <span> tag, based on if they have a URL), 2: post title related to this comment */

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__( '%1$s on %2$s' ),

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$author_markup,

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$post_title

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);

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if ( $attributes['displayDate'] ) {

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$list_items_markup .= sprintf(

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'<time datetime="%1$s" class="wp-block-latest-comments__comment-date">%2$s</time>',

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esc_attr( get_comment_date( 'c', $comment ) ),

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date_i18n( get_option( 'date_format' ), get_comment_date( 'U', $comment ) )

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);

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}

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$list_items_markup .= '</footer>';

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if ( $attributes['displayExcerpt'] ) {

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$list_items_markup .= '<div class="wp-block-latest-comments__comment-excerpt">' . wpautop( get_comment_excerpt( $comment ) ) . '</div>';

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}

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$list_items_markup .= '</article></li>';

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}

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}

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$classnames = array();

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if ( $attributes['displayAvatar'] ) {

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$classnames[] = 'has-avatars';

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}

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if ( $attributes['displayDate'] ) {

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$classnames[] = 'has-dates';

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}

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if ( $attributes['displayExcerpt'] ) {

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$classnames[] = 'has-excerpts';

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}

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if ( empty( $comments ) ) {

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$classnames[] = 'no-comments';

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}

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$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classnames ) ) );

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return ! empty( $comments ) ? sprintf(

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'<ol %1$s>%2$s</ol>',

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$wrapper_attributes,

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$list_items_markup

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) : sprintf(

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'<div %1$s>%2$s</div>',

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$wrapper_attributes,

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__( 'No comments to show.' )

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);

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}

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/**

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* Registers the `core/latest-comments` block.

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*/

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function register_block_core_latest_comments() {

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register_block_type_from_metadata(

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__DIR__ . '/latest-comments',

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array(

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'render_callback' => 'render_block_core_latest_comments',

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)

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);

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}

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add_action( 'init', 'register_block_core_latest_comments' );

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