I have created a function that sets the user ID in the firestore database based on the email adress in the authentication tab of firebase. However, I need it to be a cloud function that triggers upon the first login. I have found documentation that mentioned this functionality, but I can't figure out how I have it trigger only on the first login, not when the user logs in for the second time and also not upon user creation. I have also provided the code below, perhaps it gives a better idea of what I need. Some lines are commented out, so I could test the rest of the code. I have found multiple threads about this topic, but I cant figure out how to exactly manage this.
https://firebase.google.com/docs/functions/auth-events#trigger_a_function_on_user_creation
//Detect first login from user
//if(firebase.auth.UserCredential.isNewUser()){
if(true){
//User is logged in for the first time
//const userID = firebase.auth().currentUser.UID;
//const userEmail = firebase.auth().currentUser.email;
const userID = '1234567890';
const userEmail = 'example#example.com';
var docFound = false;
//Get email, either personal or work
console.log('Taking a snapshot...');
//Test for work email
const snapshot = db.collectionGroup('people').where('email.work', '==', userEmail).get()
.then(function(querySnapshot){
querySnapshot.forEach(function(doc){
//work email found
console.log('work email found');
console.log(doc.data());
docFound = true;
const organisationID = doc.ref.parent.parent.id;
writeUID(doc.id, userID, organisationID);
});
});
if(!docFound){
//Test for personal email
const snapshot = db.collectionGroup('people').where('email.personal', '==', userEmail).get()
.then(function(querySnapshot){
querySnapshot.forEach(function(doc){
//personal email found
console.log('personal email found');
console.log(doc.data());
const organisationID = doc.ref.parent.parent.id;
writeUID(doc.id, userID, organisationID);
});
});
}
}
async function writeUID(doc, uid, organisationID){
const res = db.collection(`organisations/${organisationID}/people`).doc(doc).set({
userId: uid
}, { merge: true });
}
/*
TODO: Detect first login
TODO: Get correct user values
Rest of the function works
*/
Thanks in advance for your help.
I can't figure out how I have it trigger only on the first login, not when the user logs in for the second time and also not upon user creation
What you're trying to do is not possible with Cloud Functions auth triggers.
Auth triggers only work when a user account is created or deleted. They don't trigger when a user signs in. Only your app knows when a user signs in or out - neither Firebase Auth nor Cloud Functions understands your specific definition of what a "first sign in" actually means. What you will have to do is detect your "first sign in" in your app code, then possibly call a function (HTTP or callable) to do some work on behalf of the user.
Related
I'm new to next-auth, and I'm looking for some help.
I have added the Google OAuth provider, and now when I run signIn("google") function on the frontend, it automatically takes me to the google's login page, and logs me in, somehow, without ever touching my database.
When the google authentication is complete, I need to be able to create a new user in my database, or retrieve the existing one if they have already signed up before (because I need to store all kinds of custom information about the user, not just their email).
And I want to make user's information available on the session object from useSession()hook. Right now I'm seeing some kind of default user info (with name, email, and image field which I didn't define).
When I was using a regular Express server and Passport, the code looked kinda like this:
const googleAuth = new GoogleStrategy(
{
clientID: process.env.GOOGLE_CLIENT_ID,
clientSecret: process.env.GOOGLE_CLIENT_SECRET,
callbackURL: "/api/v1/profiles/google/callback",
},
async (req, accessToken, refreshToken, profile, done) => {
const existingProfile = await Profile.findOne({ email: profile.emails[0].value })
/* Found user, return him and move along. */
if (existingProfile) return done(null, existingProfile)
/* Haven't found profile with this googleId, create a new one. */
const newProfile = await new Profile({
googleId: profile.id,
email: profile.emails[0].value,
})
newProfile.save()
done(null, newProfile)
}
)
So I would still be creating the users in my database, and retrieving their information on log in, so that I could send it to the client.
Where does this kind of code supposed to go when I'm using the serverless next-auth?
And a second, but kind of related question - what's that default user object that gets provided to me in the session object? The one with the name, email, and image fields that next-auth seems to create for me? How can I make it use the user object I'm returning from my database instead?
(I've done my best to look through the tutorials and examples, but couldn't find one that explains this clearly.)
I don't know if you still need this, but I hope it helps someone:
Oauth kinda mixes up Sign In and Sign Up, so if you want to have Google authentication what you probably want to do is create a callback of the Sign In function in /api/auth/[...nextauth].js, then get the account and profile as parameters and access to its provider.
async signIn({account, profile}) {
if(account.provider === 'google') {
//check if user is in your database
if(user NOT in DB) {
//add your user in DB here with profile data (profile.email, profile.name)
}
return true
}
You always want to return true since you always want to log in independently if it is in your DB or not.
Regarding the session object, you can also add a callback and access to the default session (that you can modify), token and user. Here you can retrieve all information you want from your database, add it to the session object and return it.
async session({ session, token, user }) {
const newData = DB.find(...).data
session.newfield = newInfo
return session
}
My use case is that I want to ask newly signed up users to enrich basic info like their names.
So I was hoping to do it like:
firebase.auth().onAuthStateChanged(function(user) {
if (user) {
// User is signed in.
if (some indicator tells me it is newly signed up user)
{redirect to a form to fill in more info}
} else {
// No user is signed in.
}
});
I checked the doc, and could not find anything related to this...
Thanks for the help in advance.
Since version 4.6.0: https://firebase.google.com/support/release-notes/js#4.6.0
You can get if a user is new or existing in 2 ways:
If you are getting back a UserCredential result, check result.additionalUserInfo.isNewUser
Check firebase.auth().currentUser.metadata.creationTime === firebase.auth().currentUser.metadata.lastSignInTime
Previously you had to do that on your own and keep track of the user using Firebase Realtime Database. When a user signs in, you check if a user with the specified uid exists in the database or not. If the user was not found, it is a new user, you can then add the user to the database. If the user is already in the database then this is a returning existing user. Here is an example in iOS.
Handing Firebase + Facebook login process
Example for using result.additionalUserInfo.isNewUser:
firebase.auth().signInWithPopup(provider).then((result) => {
console.log(result.additionalUserInfo.isNewUser);
});
One thing you can do is do things in the callback function of the signup function, the signup function do return a promise. You can do something like this:
firebase.auth().createUserWithEmailAndPassword(email, password)
.then(function(user) {
//I believe the user variable here is the same as firebase.auth().currentUser
//take the user to some form you want them to fill
})
.catch(function(error) {
// Handle Errors here.
var errorCode = error.code;
var errorMessage = error.message;
// ...
});
However, I don't really recommend doing it this way because the client side code can be unreliable. Think about what if a user suddenly disconnect before they can fill the form. Their data will be incomplete in your database. So if you do it this way, do set a flag in your user's profile when they submit the form so that you know who filled detailed information and who didn't.
Another better way to do this is using firebase cloud functions. You can have code like this in your cloud functions. Cloud functions are written in node.js so you don't need to spend time on another language.
exports.someoneSignedUp = functions.auth.user().onCreate(event => {
// you can send them a cloud function to lead them to the detail information form
//or you can send them an welcome email which will also lead them to where you want them to fill detailed information
});
This way is much better because you can safely assume that your cloud functions server will never be down or compromised. For more information about cloud functions you can refer to their doc: https://firebase.google.com/docs/functions/auth-events
You can check the sign-in methods the user has (if any). If there are none, it is a new user.
// Fetch sign in methods (if any)
Auth.auth().fetchSignInMethods(forEmail: userEmail!) { [self] signInMethodsArray, error in
// Check for error and alert user accordingly
if let error = error {
// handle errors
}
// Email accepted.
// Check if new or returning user.
else {
if (signInMethodsArray == nil) {
// New User
}
else {
// Returning User
}
}
}
This is Swift (iOS) code, but the concept is the same across languages.
I'm trying to create a simple Crud app with Flutter and Firebase which the records (documents created in FireStore) are related to the user who has been Authenticated. Therefore the Crud functions will only be performed by the user who created the record. IE a user will only be able able to edit/update/delete the records they added in the first place.
I have the firebase_auth and crud functions working nicely with firestore. the issues i'm have is with relating the two. I have chosen to use the users email and the unique identifier (i'm not sure if it's better to use the auto generated user id or not). I have created a separate function for simply returning the current user's email as it's being added to the firestore document. The problem is the first time i add a record the user email returns null, If i submit the form again it starts working fine.
String _userEmail;
_getUserAuthEmail() {
FirebaseAuth.instance.currentUser().then((user){
setState((){this._userEmail = user.email;});
});
return this._userEmail;
}
Which is being called from the onPressed event
onPressed: () {
crudObj.addData({
'itemName': this.itemName,
'userEmail': _getUserAuthEmail(),
}).then((result) {
dialogTrigger(context);
}).catchError((e) {
print(e);
});
},
As i'm just starting out please let me know if there is a better approach. Cheers.
You are getting null because you are not waiting for the currentUser method to settle. Change the _getUserEmail method like this:
String _userEmail;
_getUserAuthEmail() async {
FirebaseUser user = await FirebaseAuth.instance.currentUser();
setState(() {
_userEmail = user.email;
});
return this._userEmail;
}
Also, about this
"I have chosen to use the users email and the unique identifier (i'm not sure if it's better to use the auto generated user id or not)."
I suggest you using the user's uid for saving user related stuff.
I'm currently working with Firebase and React Native I have come to a slight problem.
Reading the documentation for the: createUserWithEmailAndPassword:
On successful creation of the user account, this user will also be signed in to your application.
I was trying to work with the promise as follows:
firebase.auth().createUserWithEmailAndPassword(this.state.email, this.state.password)
.then(function(authData){
this.writeUserData(authData.uid);
}).catch(function(error){
console.warn(error)
});
And my writeUserData() method:
writeUserData(the_uid) {
console.warn("Writting data ")
var today = new Date();
firebase.database().ref('users/' + authData.uid + '/').set({
name: this.state.name,
birthday: this.state.date,
email: this.state.email,
registered: today
});
}
In the function however the console.warn is never fired hence the event isn't fired since the user is automatically logged in.
Problem: The .then isn't executed since user is logged in straight away.
Goal: Be able to add the user information (name, birthday, etc) after user creation before sign in.
Okay understood you, the problem seems to be how you define a function in your .then statement. You should be using an Arrow function, like so -
firebase.auth().createUserWithEmailAndPassword(this.state.email, this.state.password)
.then((authData) => {
this.writeUserData(authData.uid);
}).catch(function(error){
console.warn(error)
});
what i have understand is that you are trying to push (name ,birthday , etc ) to firebase , well with my little experience using firebase , you have to call {firebase.database().ref().child('your path')} to create a path first , then use the push() , exemple :
{ var ref = firebaseRef.database().ref().child('Clients');
var ref = ref.push(this.state.username); }
well i m newbie , but this worked for me , hope it help you
My use case is that I want to ask newly signed up users to enrich basic info like their names.
So I was hoping to do it like:
firebase.auth().onAuthStateChanged(function(user) {
if (user) {
// User is signed in.
if (some indicator tells me it is newly signed up user)
{redirect to a form to fill in more info}
} else {
// No user is signed in.
}
});
I checked the doc, and could not find anything related to this...
Thanks for the help in advance.
Since version 4.6.0: https://firebase.google.com/support/release-notes/js#4.6.0
You can get if a user is new or existing in 2 ways:
If you are getting back a UserCredential result, check result.additionalUserInfo.isNewUser
Check firebase.auth().currentUser.metadata.creationTime === firebase.auth().currentUser.metadata.lastSignInTime
Previously you had to do that on your own and keep track of the user using Firebase Realtime Database. When a user signs in, you check if a user with the specified uid exists in the database or not. If the user was not found, it is a new user, you can then add the user to the database. If the user is already in the database then this is a returning existing user. Here is an example in iOS.
Handing Firebase + Facebook login process
Example for using result.additionalUserInfo.isNewUser:
firebase.auth().signInWithPopup(provider).then((result) => {
console.log(result.additionalUserInfo.isNewUser);
});
One thing you can do is do things in the callback function of the signup function, the signup function do return a promise. You can do something like this:
firebase.auth().createUserWithEmailAndPassword(email, password)
.then(function(user) {
//I believe the user variable here is the same as firebase.auth().currentUser
//take the user to some form you want them to fill
})
.catch(function(error) {
// Handle Errors here.
var errorCode = error.code;
var errorMessage = error.message;
// ...
});
However, I don't really recommend doing it this way because the client side code can be unreliable. Think about what if a user suddenly disconnect before they can fill the form. Their data will be incomplete in your database. So if you do it this way, do set a flag in your user's profile when they submit the form so that you know who filled detailed information and who didn't.
Another better way to do this is using firebase cloud functions. You can have code like this in your cloud functions. Cloud functions are written in node.js so you don't need to spend time on another language.
exports.someoneSignedUp = functions.auth.user().onCreate(event => {
// you can send them a cloud function to lead them to the detail information form
//or you can send them an welcome email which will also lead them to where you want them to fill detailed information
});
This way is much better because you can safely assume that your cloud functions server will never be down or compromised. For more information about cloud functions you can refer to their doc: https://firebase.google.com/docs/functions/auth-events
You can check the sign-in methods the user has (if any). If there are none, it is a new user.
// Fetch sign in methods (if any)
Auth.auth().fetchSignInMethods(forEmail: userEmail!) { [self] signInMethodsArray, error in
// Check for error and alert user accordingly
if let error = error {
// handle errors
}
// Email accepted.
// Check if new or returning user.
else {
if (signInMethodsArray == nil) {
// New User
}
else {
// Returning User
}
}
}
This is Swift (iOS) code, but the concept is the same across languages.