AuthProvider class - core library

AuthProvider must be supplied to NxFit.build and it is used to indicate the current authentication state. Only two states are possible: Authenticated and Unauthenticated. When the user is authenticated, the AuthState will be set to Authenticated with an appropriate accessToken and userId. Whenever the access token changes, the AuthState will be updated with a new instance of Authenticated. This will be used by the NxFit SDK when making HTTP calls to the server.

The same AuthState must be provided in two ways:

currentAuthState property getter which always returns the most recent AuthState.
authState stream, which NxFit will listen for changes to the AuthState.

The currentAuthState is used while initializing NxFit and will be referenced before it has a chance to listen for changes. Since a Stream may or may not replay the most recent emitted value, the current AuthState value provided as a property getter is also required.

Example implementation of an AuthManager that emits Authenticated when the user logs in:

class AuthManager extends AuthProvider {
  final BehaviorSubject<AuthState> _authState = BehaviorSubject<AuthState>.seeded(Unauthenticated());

  @override
  Stream<AuthState> get authState => _authState.stream.asBroadcastStream();

  @override
  AuthState get currentAuthState => _authState.value;

  login() {
    // Do login stuff and then emit the new AuthState:
    _authState.value = Authenticated(accessToken, userId);
  }

AuthProvider class abstract

Constructors

Properties

Methods

Operators

core library