lupus_decoupled-1.x-dev/modules/lupus_decoupled_schema_metatag/lupus_decoupled_schema_metatag.module

<?php

/**
 * @file
 * General functions and hook implementations.
 */

use Drupal\Core\Render\BubbleableMetadata;
use Drupal\Core\Routing\RouteMatchInterface;
use Symfony\Component\HttpFoundation\Request;

/**
 * Implements hook_lupus_ce_renderer_response_alter().
 *
 * Add jsonld to response.
 */
function lupus_decoupled_schema_metatag_lupus_ce_renderer_response_alter(array &$data, BubbleableMetadata $bubbleable_metadata, Request $request, ?RouteMatchInterface $route_match = NULL) {
  if (isset($data['metatags']['meta'])) {
    // Schema metatags are added to metatags meta attribute of response in the
    // same way as other metatags are. We have to filter them out and process
    // them to create jsonld.
    $metatags = &$data['metatags']['meta'];
    $schema_metatag_items = _lupus_decoupled_schema_metatag_parse_json_ld($metatags);
    if (!empty($schema_metatag_items)) {
      $data['metatags']['jsonld'] = $schema_metatag_items;
    }
  }
}

/**
 * Helper function that parses schema metatags.
 *
 * Adjust data structure to fit in
 * \Drupal\schema_metatag\SchemaMetatagManager::parseJsonld. This functions
 * also filters schema_metatags from normal metatags in response.
 *
 * @param array $metatags
 *   Metatags of current response.
 *
 * @return array
 *   Parsed schema metatag items.
 */
function _lupus_decoupled_schema_metatag_parse_json_ld(array &$metatags) {
  $schema_metatags = [];
  foreach ($metatags as $key => $item) {
    if (!empty($item['schema_metatag'])) {
      $schema_metatags[$key][]['#attributes'] = $item;
      unset($metatags[$key]);
    }
  }
  // Re-order non-schema metatags.
  $metatags = array_values($metatags);
  if (!empty($schema_metatags)) {
    $schema_metatag_manager = \Drupal::service('schema_metatag.schema_metatag_manager');
    $items = $schema_metatag_manager->parseJsonld($schema_metatags);
  }
  return $items ?? [];
}