Lets say you currently have Apps: A, B, C All registered to:
- A: registered to FUN topic
- B: registered to FUN topic
- C: registered to FUN topic
All you need to do is to register them to another topic individualy for identifying them, like this:
- A: registered to FUN topic and to APPA topic
- B: registered to FUN topic and to APPB topic
- C: registered to FUN topic and to APPC topic
Now you can target the notification to be sent with a condition causing the notification to be targeted specifically to whatever you want, the following example targets notifications to whoever is subscribed to topic: FUN and APPB:
https://fcm.googleapis.com/fcm/send
Content-Type:application/json
Authorization:key=AIzaSyZ-1u...0GBYzPu7Udno5aA
{
"condition": "'FUN' in topics && 'APPB' in topics",
"data": {
"message": "This is a Firebase Cloud Messaging Topic Message!",
}
}
more on this can be found in this Firebase documentation page