1<?php
  2/**
  3 * Server-side rendering of the `core/comment-reply-link` block.
  4 *
  5 * @package WordPress
  6 */
  7
  8/**
  9 * Renders the `core/comment-reply-link` block on the server.
 10 *
 11 * @since 6.0.0
 12 *
 13 * @param array    $attributes Block attributes.
 14 * @param string   $content    Block default content.
 15 * @param WP_Block $block      Block instance.
 16 * @return string Return the post comment's reply link.
 17 */
 18function render_block_core_comment_reply_link( $attributes, $content, $block ) {
 19	if ( ! isset( $block->context['commentId'] ) ) {
 20		return '';
 21	}
 22
 23	$thread_comments = get_option( 'thread_comments' );
 24	if ( ! $thread_comments ) {
 25		return '';
 26	}
 27
 28	$comment = get_comment( $block->context['commentId'] );
 29	if ( empty( $comment ) ) {
 30		return '';
 31	}
 32
 33	$depth     = 1;
 34	$max_depth = get_option( 'thread_comments_depth' );
 35	$parent_id = $comment->comment_parent;
 36
 37	// Compute comment's depth iterating over its ancestors.
 38	while ( ! empty( $parent_id ) ) {
 39		++$depth;
 40		$parent_id = get_comment( $parent_id )->comment_parent;
 41	}
 42
 43	$comment_reply_link = get_comment_reply_link(
 44		array(
 45			'depth'     => $depth,
 46			'max_depth' => $max_depth,
 47		),
 48		$comment
 49	);
 50
 51	// Render nothing if the generated reply link is empty.
 52	if ( empty( $comment_reply_link ) ) {
 53		return;
 54	}
 55
 56	$classes = array();
 57	if ( isset( $attributes['textAlign'] ) ) {
 58		$classes[] = 'has-text-align-' . $attributes['textAlign'];
 59	}
 60	if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
 61		$classes[] = 'has-link-color';
 62	}
 63
 64	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ) ) );
 65
 66	return sprintf(
 67		'<div %1$s>%2$s</div>',
 68		$wrapper_attributes,
 69		$comment_reply_link
 70	);
 71}
 72
 73/**
 74 * Registers the `core/comment-reply-link` block on the server.
 75 *
 76 * @since 6.0.0
 77 */
 78function register_block_core_comment_reply_link() {
 79	register_block_type_from_metadata(
 80		__DIR__ . '/comment-reply-link',
 81		array(
 82			'render_callback' => 'render_block_core_comment_reply_link',
 83		)
 84	);
 85}
 86
 87add_action( 'init', 'register_block_core_comment_reply_link' );
 88