/// <summary>
/// Calls play game of model. draw player in opponent board,
/// and check if player reached the end.
/// </summary>
/// <param name="direction"></param>
public void Play(string direction)
{
ServerModel model = ServerModel.GetInstance();
string playerId = Context.ConnectionId;
string gameName = model.Play(ToDirectionStr(direction), playerId);
string opponentId = model.GetCompetitorOf(playerId);
// draw new player location in opponent board.
Clients.Client(opponentId).moveOtherPlayer(direction);
// check if player reached goal position.
if (model.IsPlayerReachedExit(playerId))
{
Close(gameName, playerId);
}
}