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   1  <?php
   2  /**
   3   * Server-side rendering of the `core/query-no-results` block.
   4   *
   5   * @package WordPress
   6   */
   7  
   8  /**
   9   * Renders the `core/query-no-results` block on the server.
  10   *
  11   * @since 6.0.0
  12   *
  13   * @global WP_Query $wp_query WordPress Query object.
  14   *
  15   * @param array    $attributes Block attributes.
  16   * @param string   $content    Block default content.
  17   * @param WP_Block $block      Block instance.
  18   *
  19   * @return string Returns the wrapper for the no results block.
  20   */
  21  function render_block_core_query_no_results( $attributes, $content, $block ) {
  22      if ( empty( trim( $content ) ) ) {
  23          return '';
  24      }
  25  
  26      $page_key = isset( $block->context['queryId'] ) ? 'query-' . $block->context['queryId'] . '-page' : 'query-page';
  27      $page     = empty( $_GET[ $page_key ] ) ? 1 : (int) $_GET[ $page_key ];
  28  
  29      // Override the custom query with the global query if needed.
  30      $use_global_query = ( isset( $block->context['query']['inherit'] ) && $block->context['query']['inherit'] );
  31      if ( $use_global_query ) {
  32          global $wp_query;
  33          $query = $wp_query;
  34      } else {
  35          $query_args = build_query_vars_from_query_block( $block, $page );
  36          $query      = new WP_Query( $query_args );
  37      }
  38  
  39      if ( $query->post_count > 0 ) {
  40          return '';
  41      }
  42  
  43      $classes            = ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) ? 'has-link-color' : '';
  44      $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $classes ) );
  45      return sprintf(
  46          '<div %1$s>%2$s</div>',
  47          $wrapper_attributes,
  48          $content
  49      );
  50  }
  51  
  52  /**
  53   * Registers the `core/query-no-results` block on the server.
  54   *
  55   * @since 6.0.0
  56   */
  57  function register_block_core_query_no_results() {
  58      register_block_type_from_metadata(
  59          __DIR__ . '/query-no-results',
  60          array(
  61              'render_callback' => 'render_block_core_query_no_results',
  62          )
  63      );
  64  }
  65  add_action( 'init', 'register_block_core_query_no_results' );