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