CODEWITHSUNDEEP
angularfirebaseoauthobservableangularfire2
FiringBlanks
FiringBlanks

Reputation: 2084

How to get the Observables value?

I'm following along with the AngularFire tutorial here: https://angularfirebase.com/lessons/google-user-auth-with-firestore-custom-data/. My question is: How would I fetch the currently signed in user's UID and displayName in a different component? I'm already importing and injecting AuthService (the service below), but how do I access those fields in Firestore? Below is the relevant code. 

@Injectable()
export class AuthService {
  user: Observable<User>;
  constructor(private afAuth: AngularFireAuth,
              private afs: AngularFirestore,
              private router: Router) {
      //// Get auth data, then get firestore user document || null
      this.user = this.afAuth.authState
        .switchMap(user => {
          if (user) {
            return this.afs.doc<User>(`users/${user.uid}`).valueChanges()
          } else {
            return Observable.of(null)
          }
        })
  }

  googleLogin() {
    const provider = new firebase.auth.GoogleAuthProvider()
    return this.oAuthLogin(provider);
  }

  private oAuthLogin(provider) {
    return this.afAuth.auth.signInWithPopup(provider)
      .then((credential) => {
        this.updateUserData(credential.user)
      })
  }

  private updateUserData(user) {
    // Sets user data to firestore on login
    const userRef: AngularFirestoreDocument<any> = this.afs.doc(`users/${user.uid}`);
    const data: User = {
      uid: user.uid,
      email: user.email,
      displayName: user.displayName,
      photoURL: user.photoURL
    }
    return userRef.set(data)
  }

  signOut() {
    this.afAuth.auth.signOut().then(() => {
        this.router.navigate(['/']);
    });
  }
}

Upvotes: 1

Views: 1049

Answers (1)

Fetrarij
Fetrarij

Reputation: 7326

My question is: How would I fetch the currently signed in user's UID and displayName in a different component?

In a different component, you can inject this authService and can use the user property which is an observable.

if you want to use it in component only:

user: User;
constructor(public auth: AuthService) { }

now you can subscribe on auth.user eg:

ngOnInit() {
  this.auth.user.subscribe((user) => {
    this.user = user;
    console.log(user)
    /* user.uid => user id */
    /* user.displayName => user displayName */
  })
}

or just in html:

 <div *ngIf="auth.user | async as user">
    <h3>Howdy, {{ user.displayName }}</h3>
    <img  [src]="user.photoURL">
    <p>UID: {{ user.uid }}</p>
    <p>Favorite Color: {{ user?.favoriteColor }} </p>
</div>

Upvotes: 1

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