//
// Summary:
// Removes a username id from a given chat room by updating the chat room's active connection pool.
//
// Returns:
// ChatRoomConnectionPool - an updated chat room connection pool without the user connection.
//
// Raises:
// ObjectDoesNotExistException - the chat room or the user was not found.
public async Task <Tuple <ChatRoomConnectionPool, string> > RemoveUserFromChatRoomConnectionPool(string chatRoomName, string userName)
{
var chatRoomConnectionPool = await GetChatRoomConnectionPool(chatRoomName);
var user = await _userService.GetUser(userName);
var chatRoomId = chatRoomConnectionPool.ChatRoomId;
var serverInstanceId = GlobalState.ServerInstanceId;
var removedConnectionId = ChatRoomLogic.GetConnectionIdFromChatRoomConnectionPool(user.Id, chatRoomConnectionPool);
var updatedChatRoomConnectionPool = ChatRoomLogic.DecrementChatRoomConnectionPool(serverInstanceId, user.Id, chatRoomConnectionPool);
await _redis.SetKey(chatRoomId, updatedChatRoomConnectionPool, null);
return(new Tuple <ChatRoomConnectionPool, string>(updatedChatRoomConnectionPool, removedConnectionId));
}
