/// <summary>
/// Sends an undo request to the server, after undo button is clicked.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void UndoButton_Click(object sender, EventArgs e)
{
// Sending undo request to server via JSon
UndoRequest r = new UndoRequest("undo");
string request = JsonConvert.SerializeObject(r) + "\n";
NC.SendData(request);
}
public async Task <UndoRequest> UndoRequest(ulong channel, ulong player, int amount, Stream stream, Action <ChessMatch> onTimeout = null)
{
return(await Task.Run(async() =>
{
var match = await GetMatch(channel, player);
if (match == null)
{
throw new ChessException("You are not in a game.");
}
var historyCount = match.History.Count();
if (historyCount < amount)
{
amount = historyCount;
}
var moveToRevert = match.History.OrderByDescending(x => x.MoveDate).Skip(amount - 1).FirstOrDefault();
if (moveToRevert == null)
{
throw new ChessException("Nothing to undo.");
}
var userWhoseTurn = match.Game.WhoseTurn == Player.White ? match.Challenged : match.Challenger;
if (userWhoseTurn != player)
{
throw new ChessException("You can't undo another players turn.");
}
if (match.UndoRequest != null)
{
throw new ChessException("Undo request is already in process.");
}
var undoRequest = new UndoRequest {
CreatedDate = DateTime.UtcNow, CreatedBy = player, Amount = amount
};
match.UndoRequest = undoRequest;
RemoveUndoRequest(match, onTimeout);
var previousMove = match.History.OrderByDescending(x => x.MoveDate).Skip(amount).FirstOrDefault();
await WriteBoard(previousMove, new ChessGame(new GameCreationData {
Board = moveToRevert.PreviousBoardState, WhoseTurn = moveToRevert.PreviousWhoseTurn
}), stream);
return await Task.FromResult(undoRequest);
}));
}
public async Task <UndoRequest> UndoRequest(ulong channel, ulong player, Action <ChessMatch> onTimeout = null)
{
var match = await GetMatch(channel, player);
if (match == null)
{
throw new ChessException("You are not in a game.");
}
if (!match.History.Any())
{
throw new ChessException("Nothing to undo.");
}
var userWhoseTurn = match.Game.WhoseTurn == Player.White ? match.Challenged : match.Challenger;
if (userWhoseTurn != player)
{
throw new ChessException("You can't undo another players turn.");
}
if (match.UndoRequest != null)
{
throw new ChessException("Undo request is already in process.");
}
var undoRequest = new UndoRequest {
CreatedDate = DateTime.UtcNow, CreatedBy = player
};
match.UndoRequest = undoRequest;
RemoveUndoRequest(match, onTimeout);
return(await Task.FromResult(undoRequest));
}
