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   1  <?php
   2  /**
   3   * Server-side rendering of the `core/comments-pagination-next` block.
   4   *
   5   * @package WordPress
   6   */
   7  
   8  /**
   9   * Renders the `core/comments-pagination-next` 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   *
  17   * @return string Returns the next comments link for the query pagination.
  18   */
  19  function render_block_core_comments_pagination_next( $attributes, $content, $block ) {
  20      // Bail out early if the post ID is not set for some reason.
  21      if ( empty( $block->context['postId'] ) ) {
  22          return '';
  23      }
  24  
  25      $comment_vars     = build_comment_query_vars_from_block( $block );
  26      $max_page         = ( new WP_Comment_Query( $comment_vars ) )->max_num_pages;
  27      $default_label    = __( 'Newer Comments' );
  28      $label            = isset( $attributes['label'] ) && ! empty( $attributes['label'] ) ? $attributes['label'] : $default_label;
  29      $pagination_arrow = get_comments_pagination_arrow( $block, 'next' );
  30  
  31      $filter_link_attributes = static function () {
  32          return get_block_wrapper_attributes();
  33      };
  34      add_filter( 'next_comments_link_attributes', $filter_link_attributes );
  35  
  36      if ( $pagination_arrow ) {
  37          $label .= $pagination_arrow;
  38      }
  39  
  40      $next_comments_link = get_next_comments_link( $label, $max_page, $comment_vars['paged'] ?? null );
  41  
  42      remove_filter( 'next_posts_link_attributes', $filter_link_attributes );
  43  
  44      if ( ! isset( $next_comments_link ) ) {
  45          return '';
  46      }
  47      return $next_comments_link;
  48  }
  49  
  50  
  51  /**
  52   * Registers the `core/comments-pagination-next` block on the server.
  53   *
  54   * @since 6.0.0
  55   */
  56  function register_block_core_comments_pagination_next() {
  57      register_block_type_from_metadata(
  58          __DIR__ . '/comments-pagination-next',
  59          array(
  60              'render_callback' => 'render_block_core_comments_pagination_next',
  61          )
  62      );
  63  }
  64  add_action( 'init', 'register_block_core_comments_pagination_next' );