Cant send push in firebase .sendToDevice() - javascript

I'm simply trying to make a web push notifications work but I cant seem to get past the .sendToDevice() method, it runs but I dont receive any push notifications. Can someone please tell/show me what im doing wrong here...
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
exports.sendNotifications = functions.database.ref('/notifications/{notificationId}')
.onWrite((change, context) => {
console.info("Running..");
// Only edit data when it is first created.
if (change.before.exists()) {
return null;
}
// Exit when the data is deleted.
if (!change.after.exists()) {
return null;
}
// Grab the current value of what was written to the Realtime Database.
const NOTIFICATION_KEY = context.params.notificationId
const NOTIFICATION_DATA = change.after.val();
const payload = {
notification: {
title: `New Message from ${NOTIFICATION_DATA.user}!`,
body: NOTIFICATION_DATA.message,
icon: NOTIFICATION_DATA.userProfileImg,
click_action: `https://google.com`
}
};
return admin.database().ref('/tokens').once('value').then((data) => {
if ( !data.val( ) ) return;
const snapshot = data.val();
const tokens = [];
for(let key in snapshot) {
tokens.push( snapshot[key].token);
}
console.info(tokens);
console.info(snapshot);
return admin.messaging().sendToDevice(tokens, payload);
})
});

Related

How can i send different type of Notificaton with FirebaseCloud sendNotification Function

I have this function which sends notification once there is certain change in my Db node. but i want to send multiple type of notifications for different actions. but when i deploy my function it overrides prior one and then i have tried all functions in single script but its not working properly
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
exports.sendNotification = functions.database.ref('/All_Users/{reciever_user_id}/CouponsUsedNotifications/{notification_id}')
.onWrite((data, context ) => {
const reciever_user_id = context.params.reciever_user_id;
const notification_id = context.params.notification_id;
console.log('Notification sent to : ', reciever_user_id)
if(!data.after.val()){
console.log('Notification Deleted : ', notification_id)
return null;
}
const deviceToken = admin.database().ref(`/All_Users/${reciever_user_id}/Credentials/device_token`).once('value');
return deviceToken.then(result =>
{
const token_id = result.val()
const payload = {
notification:
{
title: "Coupon Used",
body: `Your Coupon has been used..!!`,
icon: "default"
}
}
return admin.messaging().sendToDevice(token_id, payload).then(
Response => {
console.log('Notification Sent')
}
)
})})
exports.sendNotification = functions.database.ref('/All_Users/{reciever_user_id}/UserApprovalNotifications/{notification_id}')
.onWrite((data, context ) => {
const reciever_user_id = context.params.reciever_user_id;
const notification_id = context.params.notification_id;
console.log('Notification sent to : ', reciever_user_id)
if(!data.after.val()){
console.log('Notification Deleted : ', notification_id)
return null;
}
const deviceToken = admin.database().ref(`/All_Users/${reciever_user_id}/Credentials/device_token`).once('value');
return deviceToken.then(result =>
{
const token_id = result.val()
const payload = {
notification:
{
title: "Profile Approved",
body: `Your Profile has been Approved..!!`,
icon: "default"
}
}
return admin.messaging().sendToDevice(token_id, payload).then(
Response => {
console.log('Notification Sent')
}
)
})})
Found the solution...as i am not javascript developer thats why i was struggling but the solution i found is pretty simple. just install the files to new folder.
exports.sendNotification = function.
the sendNotification is the name of function just change it and deploy it

Firebase database ref on not updating at first

I'm building a chat app with react native and firebase.
When the user sign in, previous messages have to load at first launch but it provides empty arrays to promise at first then when I connect again, it shows up...
I'm using snack and I have to change code to see the chat histroy(In order to update the device).
How can I load at first launch?
edit:
firebase structure
userName:
-rooms:
-otherUser:
-messages
-name
Code:
firebase.database().ref(`userName/rooms`).on('child_added', snapshot => callback(parse(snapshot)));;
const parse = snapshot => {
//console.log(snapshot);
const { name } = snapshot.val();
const { key: _id } = snapshot;
const rooms = {
_id,
name
};
return rooms;
};
And this is happening in my useEffect:
const loadRequiredMaterials = async () => {
return new Promise(async (resolve, reject) => {
//var loadedRooms = [...rooms]
var loadedRooms = []
await on(oldRooms => {
loadedRooms = [oldRooms, ...loadedRooms]
});
await resolve([loadedRooms]);
})
}
if (firebase.auth().currentUser) {
console.log(firebase.auth().currentUser)
loadRequiredMaterials()
.then((result)=> {
console.log(result)
setRooms(result[0]);
})
}

On Deploying the Firebase Cloud Function getting an error of "Each then should return a value or throw"

I am new to Cloud Functions so I having issues with below code, the error is in the last part where the console.log is mentioned, please assist what shall I been done to deploy the Function successfully, as I am following a tutorial there is no such error for the name.
'use-strict'
const functions = require('firebase-functions');
const admin = require("firebase-admin");
admin.initializeApp(functions.config().firebase);
exports.sendNotifications = functions.firestore.document("users/{user_id}/notifications/{notification_id}").onWrite(event => {
const user_id = event.params.user_id;
const notification_id = event.params.notification_id;
return admin.firestore().collection("users").doc(user_id).collection("notifications").doc(notification_id).get().then(queryResult => {
const from_user_id = queryResult.data().from;
const message = queryResult.data().message;
const from_data = admin.firestore().collection("users").doc(from_user_id).get();
const to_data = admin.firestore().collection("user").doc(user_id).get();
return Promise.all([from_data, to_data]).then(result => {
const from_name = result[0].data().name;
const to_name = result[1].data().name;
const token_id = result[1].data().token_id;
const payload = {
notification: {
title: "Notification from:" + from_name,
body: message,
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload).then(result =>{
console.log("notifcation sent");
});
});
});
});
By chaining your Promises and returning null in the last then(), as follows, you should solve your problem:
exports.sendNotifications = functions.firestore.document("users/{user_id}/notifications/{notification_id}").onWrite(event => {
const user_id = event.params.user_id;
const notification_id = event.params.notification_id;
return admin.firestore().collection("users").doc(user_id).collection("notifications").doc(notification_id).get()
.then(queryResult => {
const from_user_id = queryResult.data().from;
const message = queryResult.data().message;
const from_data = admin.firestore().collection("users").doc(from_user_id).get();
const to_data = admin.firestore().collection("user").doc(user_id).get();
return Promise.all([from_data, to_data]);
})
.then(result => {
const from_name = result[0].data().name;
const to_name = result[1].data().name;
const token_id = result[1].data().token_id;
const payload = {
notification: {
title: "Notification from:" + from_name,
body: message,
icon: "default"
}
};
return admin.messaging().sendToDevice(token_id, payload)
})
.then(messagingResponse => {
console.log("notification sent");
return null; //Note the return null here, watch the 3 videos about "JavaScript Promises" from the Firebase video series: https://firebase.google.com/docs/functions/video-series/
});
});
You may have a look at the corresponding MDN documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_promises#Chaining
Also, note that, in your code, it seems that you are not using the to_name constant.

firebase cloud function snapshot undefined

Im trying to write a function with firebase cloud function which will send an email as soon as a new message is added to my "contactMessages" realtime database. so i did this but here i got an undefined snapshot :
const functions = require("firebase-functions");
const nodemailer = require("nodemailer");
const gmailEmail =
encodeURIComponent(functions.config().gmail.email);
const gmailPassword =
encodeURIComponent(functions.config().gmail.password);
const mailTransport = nodemailer.createTransport(
`smtps://${gmailEmail}:${gmailPassword}#smtp.gmail.com`
);
exports.sendContactMessage = functions.database
.ref("/contactMessages/{pushKey}")
.onWrite((change, context) => {
// Only send email for new messages.
if (snapshot.previous.val() || !snapshot.val().name) {
return;
}
const val = snapshot.val();
const mailOptions = {
to: "test#example.com",
subject: `Information Request from ${val.name}`,
html: val.html
};
return mailTransport.sendMail(mailOptions).then(() => {
return console.log("Mail sent to: test#example.com");
});
});
Change this:
exports.sendContactMessage = functions.database
.ref("/contactMessages/{pushKey}")
.onWrite((change, context) => {
// Only send email for new messages.
if (snapshot.previous.val() || !snapshot.val().name) {
return;
}
into this:
exports.sendContactMessage = functions.database
.ref("/contactMessages/{pushKey}")
.onWrite((change, context) => {
// Only send email for new messages.
if (change.before.val() || !change.after.val().name) {
return;
}
From the docs:
For onWrite and onUpdate events, the change parameter has before and after fields. Each of these is a DataSnapshot with the same methods available in admin.database.DataSnapshot.

How to access user profile information in firebase through getUser()

I am using cloud functions as a means to send users push notifications for my app. I am following the template set by google Here. The problem I have is that I dont really understand Javascript well and I have my user profile data stored within a profile node. When I call the getUser() function I am not able to access the user info within the profile node. How can I access the data within the users profile node so that I can display their "username" and "profileImage" in the push notifications.
Data Structure
users/uid/profile/Dictionary(key/val pairings here for data).
Google Data Structure
users/uid/displayName
Cloud Function:
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();
exports.sendPushNotificationRep = functions.database.ref('/recieved-friend-requests/{userId}/{friendId}').onWrite(event => {
const userID = event.params.userId;
const friendID = event.params.friendId;
if (!event.data.val()) {
return;
}
const getDeviceTokensPromise = admin.database().ref(`/users/${userID}/fcmToken`).once('value');
// Get the follower profile.
const getRepProfilePromise = admin.auth().getUser(friendID);
return Promise.all([getDeviceTokensPromise, getRepProfilePromise]).then(results => {
const tokensSnapshot = results[0];
const friend = results[1];
if (!tokensSnapshot.hasChildren()) {
return console.log('There are no notification tokens to send to.');
}
const payload = {
notification: {
title: 'Rep Request!',
body: `${friend.username} sent you a request`,
badge: '1',
sound: 'default',
icon: 'logo3'
}
};
const tokens = Object.keys(tokensSnapshot.val());
// Send notifications to all tokens.
return admin.messaging().sendToDevice(tokens, payload).then(response => {
// For each message check if there was an error.
const tokensToRemove = [];
response.results.forEach((result, index) => {
const error = result.error;
if (error) {
console.error('Failure sending notification to', tokens[index], error);
// Cleanup the tokens who are not registered anymore.
if (error.code === 'messaging/invalid-registration-token' ||
error.code === 'messaging/registration-token-not-registered') {
tokensToRemove.push(tokensSnapshot.ref.child(tokens[index]).remove());
}
}
});
return Promise.all(tokensToRemove);
});
});
});

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