function system_js_settings_alter in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/system/system.module \system_js_settings_alter()

Implements hook_js_settings_alter().

Sets values which depend on the current request, like core/drupalSettings as well as theme_token ajax state.

File

core/modules/system/system.module, line 728

Configuration system that lets administrators modify the workings of the site.

Code

function system_js_settings_alter(&$settings, AttachedAssetsInterface $assets) {

  // As this is being output in the final response always use the master
  // request.
  $request = \Drupal::requestStack()
    ->getMasterRequest();
  $current_query = $request->query
    ->all();

  // Let output path processors set a prefix.

  /** @var \Drupal\Core\PathProcessor\OutboundPathProcessorInterface $path_processor */
  $path_processor = \Drupal::service('path_processor_manager');
  $options = [
    'prefix' => '',
  ];
  $path_processor
    ->processOutbound('/', $options);
  $pathPrefix = $options['prefix'];
  $route_match = \Drupal::routeMatch();
  if ($route_match instanceof StackedRouteMatchInterface) {
    $route_match = $route_match
      ->getMasterRouteMatch();
  }
  $current_path = $route_match
    ->getRouteName() ? Url::fromRouteMatch($route_match)
    ->getInternalPath() : '';
  $current_path_is_admin = \Drupal::service('router.admin_context')
    ->isAdminRoute($route_match
    ->getRouteObject());
  $path_settings = [
    'baseUrl' => $request
      ->getBaseUrl() . '/',
    'pathPrefix' => $pathPrefix,
    'currentPath' => $current_path,
    'currentPathIsAdmin' => $current_path_is_admin,
    'isFront' => \Drupal::service('path.matcher')
      ->isFrontPage(),
    'currentLanguage' => \Drupal::languageManager()
      ->getCurrentLanguage(LanguageInterface::TYPE_URL)
      ->getId(),
  ];
  if (!empty($current_query)) {
    ksort($current_query);
    $path_settings['currentQuery'] = (object) $current_query;
  }

  // Only set core/drupalSettings values that haven't been set already.
  foreach ($path_settings as $key => $value) {
    if (!isset($settings['path'][$key])) {
      $settings['path'][$key] = $value;
    }
  }
  if (!isset($settings['pluralDelimiter'])) {
    $settings['pluralDelimiter'] = PoItem::DELIMITER;
  }

  // Add the theme token to ajaxPageState, ensuring the database is available
  // before doing so. Also add the loaded libraries to ajaxPageState.

  /** @var \Drupal\Core\Asset\LibraryDependencyResolver $library_dependency_resolver */
  $library_dependency_resolver = \Drupal::service('library.dependency_resolver');
  if (isset($settings['ajaxPageState']) || in_array('core/drupal.ajax', $library_dependency_resolver
    ->getLibrariesWithDependencies($assets
    ->getAlreadyLoadedLibraries()))) {
    if (!defined('MAINTENANCE_MODE')) {

      // The theme token is only validated when the theme requested is not the
      // default, so don't generate it unless necessary.
      // @see \Drupal\Core\Theme\AjaxBasePageNegotiator::determineActiveTheme()
      $active_theme_key = \Drupal::theme()
        ->getActiveTheme()
        ->getName();
      if ($active_theme_key !== \Drupal::service('theme_handler')
        ->getDefault()) {
        $settings['ajaxPageState']['theme_token'] = \Drupal::csrfToken()
          ->get($active_theme_key);
      }
    }

    // Provide the page with information about the individual asset libraries
    // used, information not otherwise available when aggregation is enabled.
    $minimal_libraries = $library_dependency_resolver
      ->getMinimalRepresentativeSubset(array_unique(array_merge($assets
      ->getLibraries(), $assets
      ->getAlreadyLoadedLibraries())));
    sort($minimal_libraries);
    $settings['ajaxPageState']['libraries'] = implode(',', $minimal_libraries);
  }
}