CODEWITHSUNDEEP
firebasegoogle-cloud-functions
BIS Tech
BIS Tech

Reputation: 19514

how to send notification specified users on cloud function?

Is there any way to send a notification to specified users? 

const res = await db.collection('users')
    .where('businessDetails.serviceSubCategories','array-contains',subId)
    .where('businessDetails.isApplied','==','Y')
    .get();

    if(res.empty){
        return;
    }else{

     //send notification only response users

        const payload: admin.messaging.MessagingPayload = {
            notification:{
                title: `New Enquiry`,
                body:`${customerName} published to ${subName}`,
                badge: '1',
                sound: 'default'
            }
        }

        return fcm.sendToTopic('requirements',payload);
    }

Upvotes: 0

Views: 34

Answers (1)

oiawo
oiawo

Reputation: 145

Firebase has 2 different ways to send FCM messages :

  • Either by topic with is the way you are doing.
  • Or by registrationToken which targets one single user/device with a specific key.

link to FCM documentation The token is generated client-side and that you have to send very securely to the DB (if someone has access to that token he will be able to send notifications to your user).

Here comes the code to send the notification :


    // This registration token comes from the client FCM SDKs.
    var registrationToken = 'YOUR_REGISTRATION_TOKEN';

    var message = {
      data: {
        score: '850',
        time: '2:45'
      },
      token: registrationToken
    };

    // Send a message to the device corresponding to the provided
    // registration token.
    admin.messaging().send(message)
      .then((response) => {
        // Response is a message ID string.
        console.log('Successfully sent message:', response);
      })
      .catch((error) => {
        console.log('Error sending message:', error);
      });

Now begs the question on how to get the token from the user : More informations there

Here is the code for the WEB :

    // Get Instance ID token. Initially this makes a network call, once retrieved
    // subsequent calls to getToken will return from cache.
    messaging.getToken().then((currentToken) => {
      if (currentToken) {
        sendTokenToServer(currentToken);
        updateUIForPushEnabled(currentToken);
      } else {
        // Show permission request.
        console.log('No Instance ID token available. Request permission to generate one.');
        // Show permission UI.
        updateUIForPushPermissionRequired();
        setTokenSentToServer(false);
      }
    }).catch((err) => {
      console.log('An error occurred while retrieving token. ', err);
      showToken('Error retrieving Instance ID token. ', err);
      setTokenSentToServer(false);
    });

Upvotes: 1

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