How to Detect If User First Time in Firebase

How can I detect if user first time in Firebase

How can I detect if user first time in Firebase?

If you want to check if the user logs in for the first time, it's the same thing if you check if a user is new. So to solve this, you can simply call AdditionalUserInfo's isNewUser() method:

Returns whether the user is new or existing

In the OnCompleteListener.onComplete callback like this:

OnCompleteListener<AuthResult> completeListener = new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
boolean isNewUser = task.getResult().getAdditionalUserInfo().isNewUser();
if (isNewUser) {
Log.d("TAG", "Is New User!");
} else {
Log.d("TAG", "Is Old User!");
}
}
}
};

For more informations, please see the official documentation.

Edit: In order to make it work, you need to add a complete listener. Please see the code below:

mAuth.signInWithCredential(credential).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
boolean isNewUser = task.getResult().getAdditionalUserInfo().isNewUser();
if (isNewUser) {
Log.d(TAG, "Is New User!");
} else {
Log.d(TAG, "Is Old User!");
}
}
});

Or even simpler:

mAuth.signInWithCredential(credential).addOnCompleteListener(this, completeListener);

In which, the completeListener object is the object that was defined first.

Check if user is authenticated for the first time in Firebase Google Authentication in Android

To check if it's the first time user logs in, simply call the AdditionalUserInfo.isNewUser() method in the OnCompleteListener.onComplete callback.

Example code below, be sure to check for null.

OnCompleteListener<AuthResult> completeListener = new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
boolean isNew = task.getResult().getAdditionalUserInfo().isNewUser();
Log.d("MyTAG", "onComplete: " + (isNew ? "new user" : "old user"));
}
}
};

Check the docs for more reference AdditionalUserInfo

How to Check is the user is for the first time in google sign in android

It sounds like you're trying to store some profile information about your users in Firestore.

In that case, once the user is signed in, you should check if you already have a profile document for that user in the database. This is easiest if you use the ID of the user as the document ID in Firestore, for example Firebase Authentication's UID, or (if you're not using Firebase Authentication) Google's sign-in's account ID.

If the document exits, you know about the user already. If it doesn't exist, you'll want to send them to the profile screen to enter their bio.

How to Detect User First Time Logging in Firebase on Web App Javascript

When you call signInWithCredential() in your web app, it resolves to a UserCredential object.

This has an additionalUserInfo property, which contains a isNewUser value.

Check if the Firebase user is authenticated for the first time using google in Flutter

If the user is signing in for the first time, the AdditionalUserInfo.isNewUser property will be true.

Note that this property can be a bit finicky in my experience as "first" is a bit too strict. If that is the case for you, you might want to instead compare the creationTime and lastSigninTime in the FirebaseUserMetaData object explicitly to determine whether the user is "new enough".

How to find if the user is signing in for the first time in react firebase-ui?

When user first register, you can check user.additionalUserInfo.isNewUser in your sign in method where user is the sign in credentials

You can also check ( self explanatory )

firebase.auth().currentUser.metadata.creationTime === firebase.auth().currentUser.metadata.lastSignInTime

I believe it will also be available in your user object in onAuthStateChanged

user.metadata.creationTime === user.metadata.lastSignInTime

Firebase - Check if it's the first time signing in

Solution

I decided to just go my own way with this:

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

private oAuthLogin(provider) {

return this.afAuth.auth.signInWithPopup(provider).then((credential) => {

const userRef: AngularFirestoreDocument<User> = this.afs.doc(`Users/${credential.user.uid}`);

userRef.ref.get().then((doc) => {
if(doc.exists){
console.log('User exists!');
this.updateUserData(credential.user);
} else {
console.log('User doesnt exist. Creating...');
this.createUserData(credential.user);
}
})

})

}


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