add_message

addMessage(Conversation _conversation, String text) {
    Chat _chat = new Chat(text, DateTime.now().toUtc().millisecondsSinceEpoch, currentUser.value.id);
    if (_conversation.id == null) {
      _conversation.id = UniqueKey().toString();
      createConversation(_conversation);
    }
    _conversation.lastMessage = text;
    _conversation.lastMessageTime = _chat.time;
    _conversation.readByUsers = [currentUser.value.id];
    _chatRepository.addMessage(_conversation, _chat).then((value) {
      _conversation.users.forEach((_user) {
        if (_user.id != currentUser.value.id) {
          sendNotification(text, S.of(state.context).newMessageFrom + " " + currentUser.value.name, _user);
        }
      });
    });
  }
  
  
  
  //chat repository function thats saves to firestore
  
  
  Future<void> addMessage(Conversation conversation, Chat chat) {
    return FirebaseFirestore.instance.collection("conversations").doc(conversation.id).collection("chats").add(chat.toMap()).whenComplete(() {
      updateConversation(conversation.id, conversation.toUpdatedMap());
    }).catchError((e) {
      print(e.toString());
    });
  }