[firebase_messaging] dynamically handle foreground messages

[SimonVillage]

I tried something like this in the on message listener on iOS:

    FirebaseMessaging.onMessage.listen((RemoteMessage message) async {
      if (message.data["should_show"] == "false") {
        FirebaseMessaging.instance.setForegroundNotificationPresentationOptions(
          alert: false,
          sound: false,
        );
      } else {
        FirebaseMessaging.instance.setForegroundNotificationPresentationOptions(
          alert: true,
          sound: true,
        );
      }
    }

But this doesn't seem to work. Is there any way to conditionally show or not show notifications?

We have notifications which should only show when the app is in background or closed but if in foreground they should not show.