class TranslatorAccessControlHandler

class TranslatorAccessControlHandler extends EntityAccessControlHandler implements EntityHandlerInterface {

  /**
   * The translator manager which knows about installed translator plugins.
   *
   * @var \Drupal\tmgmt\TranslatorManager $translatorManager
   */
  protected $translatorManager;

  /**
   * Constructs a TranslatorAccessControlHandler object.
   *
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The entity type definition.
   * @param \Drupal\tmgmt\TranslatorManager $translator_manager
   *   The translator manager.
   */
  public function __construct(EntityTypeInterface $entity_type, TranslatorManager $translator_manager) {
    parent::__construct($entity_type);
    $this->translatorManager = $translator_manager;
  }

  /**
   * {@inheritdoc}
   */
  public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
    return new static($entity_type, $container
      ->get('plugin.manager.tmgmt.translator'));
  }

  /**
   * {@inheritdoc}
   */
  protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account) {

    // Don't allow delete access for busy translators.
    if (!$entity
      ->hasPlugin() && $operation != 'delete' || $operation == 'delete' && tmgmt_translator_busy($entity
      ->id())) {
      return AccessResult::forbidden();
    }
    return AccessResult::allowedIfHasPermission($account, 'administer tmgmt');
  }

  /**
   * {@inheritdoc}
   */
  protected function checkCreateAccess(AccountInterface $account, array $context, $entity_bundle = NULL) {
    $installed_translators = $this->translatorManager
      ->getLabels();
    if (empty($installed_translators)) {
      return AccessResult::forbidden();
    }
    return AccessResult::allowedIfHasPermission($account, 'administer tmgmt');
  }

}