Is there a way to instantiate a new client on server side by firebase cloud function? - getstream-io

Question

I am developing an app and trying to implement news feed by getstream.io using react native and firebase.
Is there a way to generate user token by using firebase cloud function. If there is, would you please give me a pointer how i can do so? (the snippet of codes in cloud function side and client side would be super helpful..)
I have seen similar questions, only to find out no specific tutorial.. any help is appreciated!

Answer 1

For the cloud function side you need to create a https.onRequest endpoint that calls createUserToken like so:
const functions = require('firebase-functions');
const stream = require('getstream');
const client = stream.connect('YOUR_STREAM_KEY', 'YOUR_STREAM_SECRET', 'YOUR_STREAM_ID');
exports.getStreamToken = functions.https.onRequest((req, res) => {
const token = client.createUserToken(req.body.userId);
return { token };
});
After that, deploy with firebase deploy --only functions in the terminal & get the url for the function from your firebase dashboard.
Then you can use the url in a POST request with axios or fetch or whatever like this:
const { data } = axios({
data: {
userId: 'lukesmetham', // Pass the user id for the user you want to generate the token for here.
},
method: 'POST',
url: 'CLOUD_FUNC_URL_HERE',
});
Now, data.token will be the returned stream token and you can save it to AsyncStorage or wherever you want to store it. Are you keeping your user data in firebase/firestore or stream itself? With a bit more background I can add to the above code for you depending on your setup! 😊 Hopefully this helps!
UPDATE:
const functions = require('firebase-functions');
const stream = require('getstream');
const client = stream.connect('YOUR_STREAM_KEY', 'YOUR_STREAM_SECRET', 'YOUR_STREAM_ID');
// The onCreate listener will listen to any NEW documents created
// in the user collection and will only run when it is created for the first time.
// We then use the {userId} wildcard (you can call this whatever you like.) Which will
// be filled with the document's key at runtime through the context object below.
exports.onCreateUser = functions.firestore.document('user/{userId}').onCreate((snapshot, context) => {
// Snapshot is the newly created user data.
const { avatar, email, name } = snapshot.val();
const { userId } = context.params; // this is the wildcard from the document param above.
// you can then pass this to the createUserToken function
// and do whatever you like with it from here
const streamToken = client.createUserToken(userId);
});
Let me know if that needs clearing up, these docs are super helpful for this topic too 😊
https://firebase.google.com/docs/functions/firestore-events