I implemented google signIn in Provider pattern, the signIn, signOut and isSignedIn work perfectly but currentUser is always null. Why?
class LoginController with ChangeNotifier {
var _googleSignIn = GoogleSignIn(scopes: [
'email'
]);
GoogleSignInAccount? get currentUser {
return _googleSignIn.currentUser;
}
Future<GoogleSignInAccount?> signIn() async {
try {
_googleSignIn.signIn();
} catch (e) {
print(e);
}
}
And in UI I use:
var user = Provider.of<LoginController>(context, listen: false).currentUser;
bool isSignedIn = await Provider.of<LoginController>(context,listen: false).isSignedIn();
Try setting listen: true to enable a rebuild on the widget when currentUser is set:
var user = Provider.of<LoginController>(context, listen: true).currentUser;
print("user is " + (user == null ? "not set" : "set"));
Related
I built the google signin and email password signup app using flutter,
I want when user log to application then user's "uid" and "email" save in shared preference.
In google login I built when login then pass the boolean value and pass uid and email to shared preference. Then when users close app and when reopen then login in home screen and can get uid and email.
But when user signup or login using email password then can not pass the boolean value and uid and email to google login shared preference. In below I'll mentioned google login method and email password method.
googlelogin method
// handling google sigin in
Future handleGoogleSignIn() async {
final sp = context.read<SignInProvider>();
final ip = context.read<InternetProvider>();
await ip.checkInternetConnection();
if (ip.hasInternet == false) {
openSnackbar(context, 'Check your Internet connection', Colors.red);
googleController.reset();
} else {
await sp.signInWithGoogle().then((value) {
if (sp.hasError == true) {
openSnackbar(context, sp.errorCode.toString(), Colors.white);
googleController.reset();
} else {
// checking whether user exists or not
sp.checkUserExists().then((value) async {
if (value == true) {
// user exists
await sp.getUserDataFromFirestore(sp.uid).then((value) => sp
.saveDataToSharedPreferences()
.then((value) => sp.setSignIn().then((value) {
googleController.success();
handleAfterSignIn();
})));
} else {
// user does not exist
sp.saveDataToFirestore().then((value) => sp
.saveDataToSharedPreferences()
.then((value) => sp.setSignIn().then((value) {
googleController.success();
handleAfterSignIn();
})));
}
});
}
});
}
//login function
}
saveDataToSharedPreferences method and setSignIn boolean value (it has in a siginprovider class in another file)
class SignInProvider extends ChangeNotifier {
//instantiate of firebaseAuth, facebook and google
final FirebaseAuth firebaseAuth = FirebaseAuth.instance;
final GoogleSignIn googleSignIn = GoogleSignIn();
bool _isSignedIn = false;
bool get isSignedIn => _isSignedIn;
//hasError, errorCode, provider,uid,email,name,imageUrl
bool _hasError = false;
bool get hasError => _hasError;
String? _errorCode;
String? get errorCode => _errorCode;
String? _uid;
String? get uid => _uid;
String? _email;
String? get email => _email;
SignInProvider() {
checkSignInUser();
}
Future checkSignInUser() async {
final SharedPreferences s = await SharedPreferences.getInstance();
_isSignedIn = s.getBool('signed_in') ?? false;
notifyListeners();
}
Future setSignIn() async {
final SharedPreferences s = await SharedPreferences.getInstance();
s.setBool('signed_in', true);
_isSignedIn = true;
notifyListeners();
}
Future saveDataToSharedPreferences() async {
final SharedPreferences s = await SharedPreferences.getInstance();
await s.setString('email', _email!);
await s.setString('uid', _uid!);
notifyListeners();
}
Future getDataFromSharedPreferences() async {
final SharedPreferences s = await SharedPreferences.getInstance();
_email = s.getString('email');
_uid = s.getString('uid');
notifyListeners();
}
}
**email password signup**
void signUp(String email, String password) async {
if (_formkey.currentState!.validate()) {
await _auth
.createUserWithEmailAndPassword(email: email, password: password)
.saveDataToSharedPreferences()
.sp.setSignIn()
.then((value) => {postDetailsToFirestore()})
.catchError((e) {
Fluttertoast.showToast(msg: e!.message);
});
}
}
in email password signup has postDetailsToFirestore method
postDetailsToFirestore() async {
// calling our fireStore
//calling our user model
// sending these values
FirebaseFirestore firebaseFirestore = FirebaseFirestore.instance;
User? user = _auth.currentUser;
UserModel userModel = UserModel();
if (user != null) {
//writing all the values
userModel.email = user?.email;
userModel.uid = user?.uid;
await firebaseFirestore
.collection("users")
.doc(user?.uid)
.set(userModel.toMap());
Fluttertoast.showToast(msg: "Account created successfully ");
Navigator.pushAndRemoveUntil(
(context),
MaterialPageRoute(builder: (context) => HomeScreen()),
(route) => false);
}
}
in email password signup I called
these 2 methods but show this error
when signup how to pass uid and emaill to saveDataToSharedPreferences method and pass sp.setSignIn() boolean like as in google signing?
You are trying to use method saveDataToSharedPreferences from Future class, not from auth. For fix this issue, call prefs from main object:
final result = await _auth.createUserWithEmailAndPassword(
email: email,
password: password,
);
result.saveDataToSharedPreferences()
.sp.setSignIn()
// etc.
I'm flutter beginner. I'm using local-auth for making Bio auth function. but error like below, I don't get the error why it occurs. Could you advice for this? why is it doesn't work in authenticate(), useErrorDialogs, stickyAuth, biometricOnly those three objects occurs error?
class AuthService {
static Future<bool> authenticate({
String localizedReason,
bool useErrorDialogs,
bool stickyAuth,
bool biometricOnly ,
}) {
// TODO: implement authenticate
throw UnimplementedError();
}
static Future<bool> authenticateUser() async {
//initialize Local Authentication plugin.
final LocalAuthentication _localAuthentication = LocalAuthentication();
//status of authentication.
bool isAuthenticated = false;
//check if device supports biometrics authentication.
bool isBiometricSupported = await _localAuthentication.isDeviceSupported();
//check if user has enabled biometrics.
//check
bool canCheckBiometrics = await _localAuthentication.canCheckBiometrics;
//if device supports biometrics and user has enabled biometrics, then authenticate.
if (isBiometricSupported && canCheckBiometrics) {
try {
isAuthenticated = await _localAuthentication.authenticate(
localizedReason: 'Scan your fingerprint to authenticate',
useErrorDialogs: true,
stickyAuth: true,
biometricOnly: true,
);
} on PlatformException catch (e) {
print(e);
}
}
return isAuthenticated;
}
}
I am trying to login with google and have the data mapped to a firebase user. I'm using getX. So far this works HOWEVER it automatically logs me back in as the same user if I logout and then try to log back in again. I'll send the code for my login page and the page where the logout button is if needed, but I suspect this may have to do with my AuthController which I've included here
class AuthController extends GetxController {
static AuthController instance = Get.find();
GoogleSignIn googleSignIn = GoogleSignIn();
Rxn<User> firebaseUser = Rxn<User>();
Rxn<UserModel> firestoreUser = Rxn<UserModel>();
final RxBool admin = false.obs;
String usersCollection = "users";
#override
void onReady() async {
//run every time auth state changes
ever(firebaseUser, handleAuthChanged);
firebaseUser.bindStream(user);
super.onReady();
}
handleAuthChanged(firebaseUser) async {
//get user data from firestore
if (firebaseUser?.uid != null) {
firestoreUser.bindStream(streamFirestoreUser());
print("You are logged in as ${firebaseUser.email}");
await isAdmin();
}
//this is for new users
if (firebaseUser == null) {
print('Send to signin');
Get.offAll(LoginPage());
} else {
Get.offAll(AppSetup());
}
}
// Firebase user one-time fetch
Future<User> get getUser async => auth.currentUser!;
// Firebase user a realtime stream
Stream<User?> get user => auth.authStateChanges();
//Streams the firestore user from the firestore collection
Stream<UserModel> streamFirestoreUser() {
print('streamFirestoreUser()');
return firebaseFirestore
.doc('/users/${firebaseUser.value!.uid}')
.snapshots()
.map((snapshot) => UserModel.fromSnapshot(snapshot));
}
//get the firestore user from the firestore collection
Future<UserModel> getFirestoreUser() {
return firebaseFirestore
.doc('/users/${firebaseUser.value!.uid}')
.get()
.then((documentSnapshot) => UserModel.fromSnapshot(documentSnapshot));
}
//Method to handle user sign in using email and password
// User registration using email and password
googleLogin(BuildContext context) async {
final GoogleSignInAccount? googleUser = await googleSignIn.signIn();
if (googleUser != null) {
final googleAuth = await googleUser.authentication;
if (googleAuth.accessToken != null && googleAuth.idToken != null) {
try {
await auth
.signInWithCredential(
GoogleAuthProvider.credential(
idToken: googleAuth.idToken,
accessToken: googleAuth.accessToken),
)
.then((firebaseUser) async {
print('uid: ' + firebaseUser.user!.uid.toString());
print('email: ' + firebaseUser.user!.email.toString());
//create the new user object from the login modelled data
UserModel _newUser = UserModel(
id: firebaseUser.user!.uid,
email: firebaseUser.user!.email!,
name: firebaseUser.user!.email!,
photoURL: firebaseUser.user!.photoURL,
cart: [],
);
//create the user in firestore here with the _addUserToFirestore function
_updateUserFirestore(_newUser, firebaseUser.user!);
});
} on FirebaseAuthException catch (error) {
Get.snackbar('auth.signUpErrorTitle'.tr, error.message!,
snackPosition: SnackPosition.BOTTOM,
duration: Duration(seconds: 10),
backgroundColor: Get.theme.snackBarTheme.backgroundColor,
colorText: Get.theme.snackBarTheme.actionTextColor);
}
}
}
}
void _updateUserFirestore(UserModel user, User _firebaseUser) {
firebaseFirestore.doc('/users/${_firebaseUser.uid}').update(user.toJson());
update();
}
updateUserData(Map<String, dynamic> data) {
logger.i("UPDATED");
firebaseFirestore
.collection(usersCollection)
.doc(firebaseUser.value!.uid)
.update(data);
}
//check if user is an admin user
isAdmin() async {
await getUser.then((user) async {
DocumentSnapshot adminRef =
await firebaseFirestore.collection('admin').doc(user.uid).get();
if (adminRef.exists) {
admin.value = true;
} else {
admin.value = false;
}
update();
});
}
// This is the proper sign out method!
Future<void> signOut() {
return auth.signOut();
}
}
Simply add this line of code into your logout function
> await googleSignIn.signOut()
When I hit "Sign in with Google", it does let me choose the account although somehow, the previous user gets loaded.
class GoogleSignInProvider extends ChangeNotifier {
GoogleSignIn? _googleSignIn;
GoogleSignInAccount? _user;
GoogleSignInAccount get user => _user!;
bool _isGoogleLogin = false;
final _auth = FirebaseAuth.instance;
Future signInWithGoogle(context) async {
try {
_googleSignIn = GoogleSignIn();
final googleUser = await _googleSignIn!.signIn();
if (googleUser == null) {
return;
}
_user = googleUser;
final googleAuth = await googleUser.authentication;
final AuthCredential credential = GoogleAuthProvider.credential(
accessToken: googleAuth.accessToken,
idToken: googleAuth.idToken,
);
var authCredential = await _auth.signInWithCredential(credential);
_isGoogleLogin = true;
if (authCredential.user != null) {
final snapshot = await FirebaseFirestore.instance
.collection('users')
.doc(authCredential.user!.uid)
.get();
if (!snapshot.exists) {
var userId = authCredential.user!.uid;
FirebaseFirestore.instance.collection('users').doc(userId).set({
"email": googleUser.email,
"workoutsCount": 0,
"lastWorkoutDate": null
});
}
}
notifyListeners();
Navigator.of(context).pushNamed('/dashboard');
} on FirebaseAuthException catch (e) {
showSnackBar(context, e);
} catch (e) {
print('ERROR = ');
print(e);
}
}
Future<void> signOut(context) async {
try {
if (_isGoogleLogin) {
final googleCurrentUser =
GoogleSignIn().currentUser ?? await GoogleSignIn().signIn();
if (googleCurrentUser != null) {
await GoogleSignIn().disconnect().catchError((e, stack) {
FirebaseCrashlytics.instance.recordError(e, stack);
});
}
}
await _auth.signOut();
} catch (e) {
showSnackBar(context, e);
} finally {
_isGoogleLogin = false;
Navigator.of(context).pushNamedAndRemoveUntil(
'/register_login', (Route<dynamic> route) => false);
}
}
Is there something wrong with this code??
Can you try to disconnect the account before signing out:
GoogleSignIn _googleSignIn = GoogleSignIn();
await _googleSignIn.disconnect();
await FirebaseAuth.instance.signOut();
You are using firebase auth then please use thsi for signout user :
How to Signout a user in Flutter with Firebase authentication
Remove if (_isGoogleLogin) from your signOut function. googleCurrentUser will check the consitionn and responses based on the result.
First Create a Global variable
FirebaseAuth firebaseAuth = FirebaseAuth.instance;
GoogleSignIn googleSignIn = GoogleSignIn();
Make sure you are using the above variable for login and logout
final googleCurrentUser = firebaseAuth.currentUser;
if (googleCurrentUser != null) {
googleSignIn.signOut();
await firebaseAuth.signOut();
}
User above code for signout user
I have an app contain login and register system ,the system is working correctly.
the problem is I want to keep user logged in by using flutter_session package but don't work.
first I have preloading page contain checking if user is logged in by using functions below :
void gotoTabPae() {
print('ok');
Future.delayed(const Duration(milliseconds: 3000), () {
Navigator.of(context).pushReplacementNamed('tabs');
});
}
void gotoLoginPage() {
print('no');
Future.delayed(const Duration(milliseconds: 3000), () {
Navigator.of(context).pushReplacementNamed('login');
});
}
getuser() async {
var loginedUser;
SharedPreferences preferences = await SharedPreferences.getInstance();
setState(() {
loginedUser= preferences.getString('username');
});
loginedUser != null ? gotoTabPae() : gotoLoginPage();
}
#override
void initState() {
getuser();
super.initState();
}
when I run the app and login then when I restart the app it must go to 'tabs' page ,but the value of username is always null therefore it load login page ,the login function is :
login() async {
var formdata = formLoginKey.currentState;
if (formdata.validate()) {
formdata.save();
var data = {'username': username.text, 'password': password.text};
var url =xxxx/api/controller/users/login_user.php";
var response = await http.post(url, body: data);
var responsebody = jsonDecode(response.body);
if (responsebody['status'] == 'success') {
SharedPreferences pref = await SharedPreferences.getInstance();
pref.setString('username', username.text);
Navigator.of(context).pushReplacementNamed('tabs');
} else {
_showDialog(context, responsebody['status']);
}
} else {
}
}
But in tabs page it is load the session username corret :
getuser() async {
SharedPreferences preferences = await SharedPreferences.getInstance();
var logineduser = preferences.getString('username');
}
#override
void initState() {
getuser();
super.initState();
}
How can I solve this? where is my mistake ?
Your code is running the getuser() method in the initSate() method that too even before the super.initState();. That is the reason the value is no able to load which makes it null. You should use it in the build function.
Your code might look like this:
#override
Widget build(BuildContext context) {
var loginedUser;
loginedUser = await FlutterSession().get('username');
loginedUser != null ? return ClassName()(tabs.dart) : return ClassName()(login.dart);
}
I think that in your login function, pref.setString('username', username.text) is run before the response is received. Can you try this:
http.post(url, body: data).then((response) {
var responsebody = jsonDecode(response.body);
if (responsebody['status'] == 'success') {
SharedPreferences pref = await SharedPreferences.getInstance();
pref.setString('username', username.text);
Navigator.of(context).pushReplacementNamed('tabs');
}
});
and let me know the result?