clearChatCount function

Future<String?> clearChatCount()

Implementation

Future<String?> clearChatCount() async{
  var user = FirebaseAuth.instance.currentUser;
  if (user == null)
    return "not register";
  try{
    FirebaseFirestore.instance.collection("chat").doc(user.uid).set({
      "unread_chat": chatCount,
    }, SetOptions(merge: true));
  }catch(ex){
    return "clearChatCount " + ex.toString();
  }
  return null;
}