Set state inside auth class? - firebase

Question

I have the following problem. I want the message to be the correct exception type. i can only use set state within my sign in (because my auth class is not a statlesswidget)class and pass a message there with set state(), but the same for all errors. I've been trying for 9 hours and I can't figure it out. Please help. so I just want the correct exception to be displayed.Something like „The Email adress is badly formated“.the problem is i it dont let me to set the error message be the real error message and i dont know how to fix it
Widget _buildLoginBtn() {
return Container(
padding: EdgeInsets.symmetric(vertical: 25.0),
width: double.infinity,
child: RawMaterialButton(
elevation: 5.0,
padding: EdgeInsets.all(15.0),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(30.0),
),
fillColor: Colors.white,
child: Text(
'LOGIN',
style: TextStyle(
color: Color(0xFF527DAA),
letterSpacing: 1.5,
fontSize: 18.0,
fontWeight: FontWeight.bold,
fontFamily: 'OpenSans',
),
),
onPressed: () async {
if (_formKey.currentState.validate()) {
print('valid');
setState(() => loading = false);
dynamic result =
await _auth.signIN(email, password);
if (result == null) {
setState(() => error = 'Check your Input');
loading= false;
}
}
}),
);
}
Future<String> signIN(String email, String password) async {
try {
FirebaseUser user = (await _auth.signInWithEmailAndPassword(
email: email.trim(), password: password)).user;
} catch (e) {
return null;
}
if (user != null) {
print(user);
}
return null;
}
So after im following # Gerpea advice I Get the following error when im just trying to catch the error without the statement on FIREBASEAUTHERROR and when im trying with the statement. When im trying to update my auth and cloud and core it gets me another error.And I can really say if the he ignored the catch block because it don't starts actually when im starting I get as I said before the error in console Im using:
cupertino_icons: ^1.0.2
firebase_auth: ^0.14.0+5
cloud_firestore: ^0.12.9+4
firebase_core_web: ^0.2.1+3
provider: ^4.3.3
flutter_svg: ^0.19.2+1
flutter_spinkit: "^4.1.2"
auto_size_text: ^2.1.0
firebase_core: ^0.4.0
get_it: ^5.0.6
The error ist this:
Invalid depfile: /Users/MYUSERNAME/Desktop/project neu2/flutter_application_2/.dart_tool/flutter_build/7e96e6ced6aa40f9bcd60c2328bbea3e/kernel_snapshot.d
^
../../../flutter/.pub-cache/hosted/pub.dartlang.org/js-0.6.3/lib/js.dart:8:1: Error: Not found: 'dart:js'
export 'dart:js' show allowInterop, allowInteropCaptureThis;
^
../../../flutter/.pub-cache/hosted/pub.dartlang.org/js-0.6.3/lib/js_util.dart:8:1: Error: Not found: 'dart:js_util'
export 'dart:js_util';
^
../../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-0.2.1+3/lib/src/interop/utils/js_interop.dart:24:7: Error: Method not found: 'hasProperty'.
if (util.hasProperty(jsObject, 'toDateString')) {
../../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-0.2.1+3/lib/src/interop/utils/utils.dart:39:26: Error: Method not found: 'getProperty'.
map[key] = dartify(util.getProperty(jsObject, key), customDartify);
^^^^^^^^^^^
../../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-0.2.1+3/lib/src/interop/utils/utils.dart:65:17: Error: Method not found: 'newObject'.
var jsMap = util.newObject();
../../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-0.2.1+3/lib/src/interop/utils/utils.dart:67:7: Error: Method not found: 'setProperty'.
util.setProperty(jsMap, key, jsify(value, customJsify));
../../../flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-0.2.1+3/lib/src/interop/utils/utils.dart:73:12: Error: Method not found: 'allowInterop'.
OKafter trying the second correction that #Gerpea send I get the same error so I decide to update to the newest versions go auth.
No I got some problems but I think that's maybe be easyler to correct
but don't really how maybe you know?
import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core_web/firebase_core_web_interop.dart';
import 'package:flutter_application_2/models/user.dart';
class AuthService {
final FirebaseAuth _auth = FirebaseAuth.instance;
String error;
//create user obj based on FirebasedUser
User _userFromFirebaseUser(FirebaseUser user) {
return user != null ? User(uid: user.uid) : null;
}
//auth change user stream
Stream<User> get user {
return _auth.onAuthStateChanged.map(_userFromFirebaseUser);
}
//sign in anon
Future signInAnon() async {
try {
AuthResult result = await _auth.signInAnonymously();
FirebaseUser user = result.user;
return _userFromFirebaseUser(user);
} catch (e) {
print(e.toString());
return null;
}
}
//sign in with passwort and email
Future<String> signIN(String email, String password) async {
try {
FirebaseUser user = (await _auth.signInWithEmailAndPassword(
email: email.trim(),
password: password,
)).user;
} on FirebaseAuthException catch (e) {
switch(e.code) {
case 'user-not-found': {
return 'No user found';
}
default: {
return 'Unexpected error!';
}
}
}
return null;
}
//register with passwort an email
Future<String> signUp(String email, String password) async {
FirebaseUser user = (await _auth.createUserWithEmailAndPassword(
email: email, password: password)) .user;
try {
await user.sendEmailVerification();
return user.uid;
} catch (e) {
print(e.toString);
return null;
}
}
//sign out
Future signOut() async {
try {
return await _auth.signOut();
} catch (e) {
print(e.toString());
return null;
}
}
//resetpassword
Future<void> sendPasswordResetEmail(String email) async {
try {
return await _auth.sendPasswordResetEmail(email: email);
} catch (e) {
print(e.toString());
return null;
}
}
}
that's the exceptions
enter image description here
OK now it logs very good I just have 2 exceptions. Code looks like that:
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter_application_2/models/user.dart' as Model;
class AuthService {
final FirebaseAuth _auth = FirebaseAuth.instance;
String error;
//create user obj based on FirebasedUser
Model.User _userFromFirebaseUser(Model.User user) {
return user != null ? Model.User(uid: user.uid) : null;
}
//auth change user stream
Stream<Model.User> get user {
return _auth.onAuthStateChanged.map(_userFromFirebaseUser);
}
//sign in anon
Future signInAnon() async {
try {
UserCredential result = await _auth.signInAnonymously();
User user = result.user;
return _userFromFirebaseUser(user);
} catch (e) {
print(e.toString());
return null;
}
}
//sign in with passwort and email
Future<String> signIN(String email, String password) async {
try {
User user = (await _auth.signInWithEmailAndPassword(
email: email.trim(),
password: password,
)).user;
} on FirebaseAuthException catch (e) {
switch(e.code) {
case 'user-not-found': {
return 'No user found';
}
default: {
return 'Unexpected error!';
}
}
}
return null;
}
//register with passwort an email
Future<String> signUp(String email, String password) async {
User user = (await _auth.createUserWithEmailAndPassword(
email: email, password: password)) .user;
try {
await user.sendEmailVerification();
return user.uid;
} catch (e) {
print(e.toString);
return null;
}
}
//sign out
Future signOut() async {
try {
return await _auth.signOut();
} catch (e) {
print(e.toString());
return null;
}
}
//resetpassword
Future<void> sendPasswordResetEmail(String email) async {
try {
return await _auth.sendPasswordResetEmail(email: email);
} catch (e) {
print(e.toString());
return null;
}
}
}
And EXCEptions like that:
enter image description here
#Gerpea
So here's my code
Future<String> signUp(String email, String password, String fullname,String user) async {
try {
( await _auth.createUserWithEmailAndPassword(
email: email.trim(), password: password,)).user.sendEmailVerification();
await DatbaseService(uid: user.uid).updateUserData('username', 'fullname', 'Passwort', 'Email');
} on FirebaseAuthException catch (e) {
And the method from YouTube:
Future registerWithEmailAndAPassword(String email, String,Passwort)async {
try{
AuthResult result = await.createUserWithEmailAndPassowrd(email:email,password:password);
FirebaseUser user =result.user;
await DatabaseService(uid:user.uid).updateUserData('0','new crew member',100);
return _userFromFirebaseUser(user);
}catch (e){

Answer 1

signInWithEmailAndPassword() method in case of error will throw a FirebaseAuthException which contain code field with error code.
The full list of errors for this method can be found here.
So you can rewrite you method a bit, to return an error message instead just null.
Future<String> signIN(String email, String password) async {
try {
User user = (await _auth.signInWithEmailAndPassword(
email: email.trim(),
password: password,
)).user;
} on FirebaseAuthException catch (e) {
switch(e.code) {
case 'user-not-found': {
return 'No user found';
}
default: {
return 'Unexpected error!';
}
}
}
return null;
}
Now this method return null if there is no error and String if some error occurs.
Use this in onPressed callback.
onPressed: () async {
if (_formKey.currentState.validate()) {
print('valid');
String authError = await _auth.signIN(email, password);
if (authError != null) {
setState(() => error = authError);
}
setState(() => loading = false);
}
}
firebase_auth: ^0.14.0+5
This is a bit outdated and has some problems, so it will be better if you
will upgrade your dependencies.
But if you can't upgrade. This should work.
Future<String> signIN(String email, String password) async {
try {
FirebaseUser user = (await _auth.signInWithEmailAndPassword(
email: email.trim(),
password: password,
)).user;
} on AuthException catch (e) {
switch(e.code) {
case 'ERROR_USER_NOT_FOUND': {
return 'No user found';
}
default: {
return 'Unexpected error!';
}
}
} catch(e) {
return 'Some error that FirebaseAuth do not catch'!;
}
return null;
}
List of error codes can be found here.