Question

我的应用中有谷歌注册功能。我的注册区有一个这样的活动

if (event is GoogleSubmitted) {
      try {
        final credential = await authenticationRepository.getGoogleCredential();
        final user = await _firebaseAuth.signInWithCredential(credential);
        if (user.additionalUserInfo.isNewUser) {
          await authenticationRepository.persistUser(prefs);
          yield* createUser(user);
        } else {
          yield* subscribeUser(user);
        }
      } catch (exception) {
        yield* _errors(exception);
      }
    }

和创建用户方法：

Stream<SignUpState> createUser(UserCredential user) async* {
    await PraxApiClient().createUser(email: user.user.email);
    var localUser =
        PraxUser(email: user.user.email, id: user.user.uid, name: user.user.displayName, photo: user.user.photoURL, isNewUser: true);
    yield SignUpSuccess(localUser, true);
  }

然后我的注册页面中有一个 BlocListener：

else if (state is SignUpSuccess) {
                    Navigator.of(context).popUntil((route) => route.isFirst);
                    BlocProvider.of<AuthenticationBloc>(context).add(AuthenticationUserChanged(state.user, true));
                  }

布尔值 true（保存在 SharedPreferences 中）然后传递给我的身份验证块。

class AuthenticationBloc extends Bloc<AuthenticationEvent, AuthenticationState> {
  AuthenticationBloc({
    @required AuthenticationRepository authenticationRepository,
  })  : assert(authenticationRepository != null),
        _authenticationRepository = authenticationRepository,
        super(const AuthenticationState.unknown()) {
    _userSubscription = _authenticationRepository.user.listen(
      (user) => add(AuthenticationUserChanged(user, user.isNewUser)),
    );
  }

  final AuthenticationRepository _authenticationRepository;
  StreamSubscription<PraxUser> _userSubscription;

  @override
  Stream<AuthenticationState> mapEventToState(
    AuthenticationEvent event,
  ) async* {
    if (event is AuthenticationUserChanged) {
      var userRepository = UserRepository();
      final DeviceInfoPlugin deviceInfoPlugin = new DeviceInfoPlugin();

      SharedPreferences prefs = await SharedPreferences.getInstance();
      bool isNewUser = (prefs.getBool('is_new_user') ?? false);

然后我根据用户新注册的天气对我的路由进行排序。

if (event.user != PraxUser.empty) {
      if (isNewUser) {
        return AuthenticationState.signedUp(event.user);
      } else {
        return AuthenticationState.authenticated(event.user);
      }
    } else {
      return AuthenticationState.unauthenticated();
    }

我的问题是，一旦我进入 google 注册流程，侦听器就会从 final user = await _firebaseAuth.signInWithCredential(credential); 调用中过快地触发，并且布尔值从未保存到存储中，因此我的路由是错误的。我想知道解决这个问题的最佳方法是什么..

检查用户是否第一次使用 bloc 进行身份验证

0 个答案: