class SearchPageRoutes

class SearchPageRoutes implements ContainerInjectionInterface {

  /**
   * The search page repository.
   *
   * @var \Drupal\search\SearchPageRepositoryInterface
   */
  protected $searchPageRepository;

  /**
   * Constructs a new search route subscriber.
   *
   * @param \Drupal\search\SearchPageRepositoryInterface $search_page_repository
   *   The search page repository.
   */
  public function __construct(SearchPageRepositoryInterface $search_page_repository) {
    $this->searchPageRepository = $search_page_repository;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container
      ->get('search.search_page_repository'));
  }

  /**
   * Returns an array of route objects.
   *
   * @return \Symfony\Component\Routing\Route[]
   *   An array of route objects.
   */
  public function routes() {
    $routes = [];

    // @todo Decide if /search should continue to redirect to /search/$default,
    //   or just perform the appropriate search.
    if ($default_page = $this->searchPageRepository
      ->getDefaultSearchPage()) {
      $routes['search.view'] = new Route('/search', [
        '_controller' => 'Drupal\\search\\Controller\\SearchController::redirectSearchPage',
        '_title' => 'Search',
        'entity' => $default_page,
      ], [
        '_entity_access' => 'entity.view',
        '_permission' => 'search content',
      ], [
        'parameters' => [
          'entity' => [
            'type' => 'entity:search_page',
          ],
        ],
      ]);
    }
    $active_pages = $this->searchPageRepository
      ->getActiveSearchPages();
    foreach ($active_pages as $entity_id => $entity) {
      $routes["search.view_{$entity_id}"] = new Route('/search/' . $entity
        ->getPath(), [
        '_controller' => 'Drupal\\search\\Controller\\SearchController::view',
        '_title' => 'Search',
        'entity' => $entity_id,
      ], [
        '_entity_access' => 'entity.view',
        '_permission' => 'search content',
      ], [
        'parameters' => [
          'entity' => [
            'type' => 'entity:search_page',
          ],
        ],
      ]);
      $routes["search.help_{$entity_id}"] = new Route('/search/' . $entity
        ->getPath() . '/help', [
        '_controller' => 'Drupal\\search\\Controller\\SearchController::searchHelp',
        '_title' => 'About searching',
        'entity' => $entity_id,
      ], [
        '_entity_access' => 'entity.view',
        '_permission' => 'search content',
      ], [
        'parameters' => [
          'entity' => [
            'type' => 'entity:search_page',
          ],
        ],
      ]);
      if ($entity
        ->getPlugin()
        ->usesAdminTheme()) {
        $routes["search.view_{$entity_id}"]
          ->setOption('_admin_route', TRUE);
        $routes["search.help_{$entity_id}"]
          ->setOption('_admin_route', TRUE);
      }
    }
    return $routes;
  }

}