join method

Implementation

Future<void> join(Doc<PlayRoomEntity> playRoomDoc) async {
  final user = await _auth.currentUser;
  final userDocRef = _store.docRef<UserEntity>(user.uid);
  // 既に参加済みの場合
  if (playRoomDoc.entity.humans.contains(userDocRef.ref)) {
    value.haveJoinedPlayRoom = playRoomDoc;
    return notifyListeners();
  }

  final roomDocRef = _store.collectionRef<PlayRoomEntity>().docRef(playRoomDoc.id);
  final batch = _store.firestore.batch();
  await userDocRef.updateData(<String, dynamic>{
    UserEntityField.joinPlayRoom.name: playRoomDoc.ref,
    TimestampField.updatedAt: FieldValue.serverTimestamp(),
  }, batch: batch);
  await roomDocRef.updateData(<String, dynamic>{
    PlayRoomEntityField.humans.name: FieldValue.arrayUnion(<DocumentReference>[userDocRef.ref]),
    TimestampField.updatedAt: FieldValue.serverTimestamp(),
  }, batch: batch);
  await batch.commit();
  value.haveJoinedPlayRoom = playRoomDoc;
  notifyListeners();
}