connect method

Implementation

Future connect(NsgBaseController controller) async {
  if (!_initialized) await initialize();
  var onRetry = controller.onRetry;

  if (useNsgAuthorization && allowConnect && serverUri.isNotEmpty) {
    var checkResult = await _checkVersion(onRetry);
    if (checkResult == 2) {
      NsgBaseController.showErrorByString('Application update required');
      //TODO: сменить на диалог и запретить работу при наличии обязательного обновления
    } else if (checkResult == 1) {
      NsgBaseController.showErrorByString('A newer version is available. It is recommended to update the application');
    }
    if (token == '') {
      await _anonymousLogin(onRetry);
    } else {
      try {
        var result = await _checkToken(onRetry);
        if (!result) {
          debugPrint('CheckToken - Сервер отверг токен');
          await _anonymousLogin(onRetry);
        }
      } on NsgApiException catch (e) {
        if (e.error.errorType == null) {
        } else {
          rethrow;
        }
        await _anonymousLogin(onRetry);
      }
    }
  }
  await setLocale(languageCode: languageCode);
  if (allowConnect && isAnonymous && loginRequired && serverUri.isNotEmpty) {
    await openLoginPage().then((value) => controller.loadProviderData());
  } else {
    await controller.loadProviderData();
  }
}