class ShortcutSetController

class ShortcutSetController extends ControllerBase {
  
  /**
   * The path validator.
   *
   * @var \Drupal\Core\Path\PathValidatorInterface
   */
  protected $pathValidator;
  
  /**
   * Creates a new ShortcutSetController instance.
   *
   * @param \Drupal\Core\Path\PathValidatorInterface $path_validator
   *   The path validator.
   */
  public function __construct(PathValidatorInterface $path_validator) {
    $this->pathValidator = $path_validator;
  }
  
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container->get('path.validator'));
  }
  
  /**
   * Creates a new link in the provided shortcut set.
   *
   * @param \Drupal\shortcut\ShortcutSetInterface $shortcut_set
   *   The shortcut set to add a link to.
   * @param \Symfony\Component\HttpFoundation\Request $request
   *   The request object.
   *
   * @return \Symfony\Component\HttpFoundation\RedirectResponse
   *   A redirect response to the front page, or the previous location.
   *
   * @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
   */
  public function addShortcutLinkInline(ShortcutSetInterface $shortcut_set, Request $request) {
    $link = $request->query
      ->get('link');
    $name = $request->query
      ->get('name');
    if (parse_url($link, PHP_URL_SCHEME) === NULL && $this->pathValidator
      ->isValid($link)) {
      $shortcut = $this->entityTypeManager()
        ->getStorage('shortcut')
        ->create([
        'title' => $name,
        'shortcut_set' => $shortcut_set->id(),
        'link' => [
          'uri' => 'internal:/' . $link,
        ],
      ]);
      try {
        $shortcut->save();
        $this->messenger()
          ->addStatus($this->t('Added a shortcut for %title.', [
          '%title' => $shortcut->label(),
        ]));
      } catch (\Exception $e) {
        $this->messenger()
          ->addError($this->t('Unable to add a shortcut for %title.', [
          '%title' => $shortcut->label(),
        ]));
      }
      return $this->redirect('<front>');
    }
    throw new AccessDeniedHttpException();
  }

}