getUser method

Implementation

@override
Future<ChatUserModel?> getUser(String id) async {
  if (_users.containsKey(id)) {
    return _users[id]!;
  }

  return _userCollection.doc(id).get().then((response) {
    var data = response.data();

    var user = data == null
        ? ChatUserModel(id: id)
        : ChatUserModel(
            id: id,
            firstName: data.firstName,
            lastName: data.lastName,
            imageUrl: data.imageUrl,
          );

    _users[id] = user;

    return user;
  });
}