Firebase Cloud Messaging Send Click_Action

Firebase FCM notifications click_action payload

If your app is in background, Firebase will not trigger onMessageReceived(). Why.....? I have no idea. In this situation, I do not see any point in implementing FirebaseMessagingService.

According to docs, if you want to process background message arrival, you have to send 'click_action' with your message.
But it is not possible if you send message from Firebase console, only via Firebase API.
It means you will have to build your own "console" in order to enable marketing people to use it. So, this makes Firebase console also quite useless!

There is really good, promising, idea behind this new tool, but executed badly.

I suppose we will have to wait for new versions and improvements/fixes!

How to specify sound and click_action in firebase cloud function

Ok, I finally managed to gather bits and pieces here and there to make it work. Don't understand why the docs do not have a clear and direct path to such a common requirement.

exports.sendComNotification = functions.firestore  .document('Comunicados/{comID}')  .onCreate((snap, context) => {    const doc = snap.data();    const msg = doc.title;    var message = {      notification: {        title: 'Comunicado da Diretoria!',        body: msg      },      data: {        title: 'Comunicado',        body: msg      },      android: {        notification: {          sound: 'default',          click_action: 'FLUTTER_NOTIFICATION_CLICK',        },      },      apns: {        payload: {          aps: {            badge: 1,            sound: 'default'          },        },      },      topic: "Comunicados"    };

    return admin.messaging().send(message)      .then((response) => {
        console.log('Successfully sent message:', response);        return      })      .catch((error) => {        console.log('Error sending message:', error);        return      });
  });

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