How to use Firebase trigger to send push notification with an atomic update
I'm going to send notifications to devices in a trigger.
The trigger is triggered when an object under "/chats/{chatId}" was created.
The chat object has a structure like:
{
members: {
0: "userId1",
1: "userId2"
},
...
}
The logic behind my code is to read userToken (proprierty of each user) forEach members; send notification (payload) to every token.
The code below works.
exports.onChatCreate = functions.database
.ref("/chats/{chatId}")
.onCreate((chatSnap, context) => {
// const members = chatSnap.val().members; // works?!
let database = admin.database();
let messaging = admin.messaging();
const chatId = context.params.chatId;
let tokens = ;
let notifications = ;
const payload = {
notification: {
title: "MyTitle",
body: "Notification description"
}
};
chatSnap.val().members.forEach(function(m) {
database
.ref("users")
.child(m)
.once("value")
.then(function(snapshot) {
let fcmToken = snapshot.val().FCMToken;
if (fcmToken) {
tokens.push(fcmToken);
messaging.sendToDevice(fcmToken, payload);
}
});
});
return Promise.all(notifications);
});
Now, I want to send notifications with an atomic update, after push every token in tokens array. I prepare this code, but it doesn't work.
return loadUsers().then(users => {
let tokens = ;
for (let user of users) {
tokens.push(user.pushToken);
}
let payload = {
notification: {
title: 'Title',
body: 'Notification description'
}
};
return admin.messaging().sendToDevice(tokens, payload);
});
Where am I wrong?!
node.js
firebase firebase-cloud-messaging google-cloud-functions asked Nov 20 at 14:34
barracus
13519
add a comment |
I'm going to send notifications to devices in a trigger.
The trigger is triggered when an object under "/chats/{chatId}" was created.
The chat object has a structure like:
{
members: {
0: "userId1",
1: "userId2"
},
...
}
The logic behind my code is to read userToken (proprierty of each user) forEach members; send notification (payload) to every token.
The code below works.
exports.onChatCreate = functions.database
.ref("/chats/{chatId}")
.onCreate((chatSnap, context) => {
// const members = chatSnap.val().members; // works?!
let database = admin.database();
let messaging = admin.messaging();
const chatId = context.params.chatId;
let tokens = ;
let notifications = ;
const payload = {
notification: {
title: "MyTitle",
body: "Notification description"
}
};
chatSnap.val().members.forEach(function(m) {
database
.ref("users")
.child(m)
.once("value")
.then(function(snapshot) {
let fcmToken = snapshot.val().FCMToken;
if (fcmToken) {
tokens.push(fcmToken);
messaging.sendToDevice(fcmToken, payload);
}
});
});
return Promise.all(notifications);
});
Now, I want to send notifications with an atomic update, after push every token in tokens array. I prepare this code, but it doesn't work.
return loadUsers().then(users => {
let tokens = ;
for (let user of users) {
tokens.push(user.pushToken);
}
let payload = {
notification: {
title: 'Title',
body: 'Notification description'
}
};
return admin.messaging().sendToDevice(tokens, payload);
});
Where am I wrong?!
node.js
firebase firebase-cloud-messaging google-cloud-functions asked Nov 20 at 14:34
barracus
13519
add a comment |
I'm going to send notifications to devices in a trigger.
The trigger is triggered when an object under "/chats/{chatId}" was created.
The chat object has a structure like:
{
members: {
0: "userId1",
1: "userId2"
},
...
}
The logic behind my code is to read userToken (proprierty of each user) forEach members; send notification (payload) to every token.
The code below works.
exports.onChatCreate = functions.database
.ref("/chats/{chatId}")
.onCreate((chatSnap, context) => {
// const members = chatSnap.val().members; // works?!
let database = admin.database();
let messaging = admin.messaging();
const chatId = context.params.chatId;
let tokens = ;
let notifications = ;
const payload = {
notification: {
title: "MyTitle",
body: "Notification description"
}
};
chatSnap.val().members.forEach(function(m) {
database
.ref("users")
.child(m)
.once("value")
.then(function(snapshot) {
let fcmToken = snapshot.val().FCMToken;
if (fcmToken) {
tokens.push(fcmToken);
messaging.sendToDevice(fcmToken, payload);
}
});
});
return Promise.all(notifications);
});
Now, I want to send notifications with an atomic update, after push every token in tokens array. I prepare this code, but it doesn't work.
return loadUsers().then(users => {
let tokens = ;
for (let user of users) {
tokens.push(user.pushToken);
}
let payload = {
notification: {
title: 'Title',
body: 'Notification description'
}
};
return admin.messaging().sendToDevice(tokens, payload);
});
Where am I wrong?!
node.js
firebase firebase-cloud-messaging google-cloud-functions asked Nov 20 at 14:34
barracus
13519
I'm going to send notifications to devices in a trigger.
The trigger is triggered when an object under "/chats/{chatId}" was created.
The chat object has a structure like:
{
members: {
0: "userId1",
1: "userId2"
},
...
}
The logic behind my code is to read userToken (proprierty of each user) forEach members; send notification (payload) to every token.
The code below works.
exports.onChatCreate = functions.database
.ref("/chats/{chatId}")
.onCreate((chatSnap, context) => {
// const members = chatSnap.val().members; // works?!
let database = admin.database();
let messaging = admin.messaging();
const chatId = context.params.chatId;
let tokens = ;
let notifications = ;
const payload = {
notification: {
title: "MyTitle",
body: "Notification description"
}
};
chatSnap.val().members.forEach(function(m) {
database
.ref("users")
.child(m)
.once("value")
.then(function(snapshot) {
let fcmToken = snapshot.val().FCMToken;
if (fcmToken) {
tokens.push(fcmToken);
messaging.sendToDevice(fcmToken, payload);
}
});
});
return Promise.all(notifications);
});
Now, I want to send notifications with an atomic update, after push every token in tokens array. I prepare this code, but it doesn't work.
return loadUsers().then(users => {
let tokens = ;
for (let user of users) {
tokens.push(user.pushToken);
}
let payload = {
notification: {
title: 'Title',
body: 'Notification description'
}
};
return admin.messaging().sendToDevice(tokens, payload);
});
Where am I wrong?!
node.js
firebase firebase-cloud-messaging google-cloud-functions node.js
firebase firebase-cloud-messaging google-cloud-functions asked Nov 20 at 14:34
barracus
13519
asked Nov 20 at 14:34
barracus
13519
asked Nov 20 at 14:34
barracus
13519
asked Nov 20 at 14:34
barracus
13519
asked Nov 20 at 14:34
barracus
13519
13519
add a comment |
add a comment |
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