public string Join(string user, string connectionId)
{
var existing = Players.Concat(WaitingRoom).FirstOrDefault(t => t.Name == user);
if (existing != null)
{
if (existing.ConnectionId != connectionId)
{
existing.ConnectionId = connectionId;
Message(user, $"re-joined the game");
}
}
else if (string.IsNullOrEmpty(Owner))
{
Owner = user;
Players.Add(CreatePlayer(user, connectionId));
}
else
{
if (Players.Count >= MaxPlayers)
{
return($"Game already has maximum number of players");
}
WaitingRoom.Add(CreatePlayer(user, connectionId));
Message(user, $"requested to join the game");
}
return(null);
}