<?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 esc_html( $title );

}

/**

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

 *

 * @param array $attributes The block attributes.

 *

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

 */

function render_block_core_latest_comments( $attributes = array() ) {

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

	$comments = get_comments(

		apply_filters(

			'widget_comments_args',

			array(

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

				'status'      => 'approve',

				'post_status' => 'publish',

			)

		)

	);

	$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>';

		}

	}

	$class = 'wp-block-latest-comments';

	if ( ! empty( $attributes['className'] ) ) {

		$class .= ' ' . $attributes['className'];

	}

	if ( isset( $attributes['align'] ) ) {

		$class .= " align{$attributes['align']}";

	}

	if ( $attributes['displayAvatar'] ) {

		$class .= ' has-avatars';

	}

	if ( $attributes['displayDate'] ) {

		$class .= ' has-dates';

	}

	if ( $attributes['displayExcerpt'] ) {

		$class .= ' has-excerpts';

	}

	if ( empty( $comments ) ) {

		$class .= ' no-comments';

	}

	$classnames = esc_attr( $class );

	$block_content = ! empty( $comments ) ? sprintf(

		'<ol class="%1$s">%2$s</ol>',

		$classnames,

		$list_items_markup

	) : sprintf(

		'<div class="%1$s">%2$s</div>',

		$classnames,

		__( 'No comments to show.' )

	);

	return $block_content;

}

register_block_type(

	'core/latest-comments',

	array(

		'attributes'      => array(

			'align'          => array(

				'type' => 'string',

				'enum' => array( 'left', 'center', 'right', 'wide', 'full' ),

			),

			'className'      => array(

				'type' => 'string',

			),

			'commentsToShow' => array(

				'type'    => 'number',

				'default' => 5,

				'minimum' => 1,

				'maximum' => 100,

			),

			'displayAvatar'  => array(

				'type'    => 'boolean',

				'default' => true,

			),

			'displayDate'    => array(

				'type'    => 'boolean',

				'default' => true,

			),

			'displayExcerpt' => array(

				'type'    => 'boolean',

				'default' => true,

			),

		),

		'render_callback' => 'render_block_core_latest_comments',

	)

);