public ulong WhoseTurn(ChessMatchStatusModel match)
{
if (match.Game == null)
{
match.Game = match.Match.HistoryList.Count == 0
? new ChessGame()
: new ChessGame(match.Match.HistoryList.Select(x => x.Move), true);
}
return(match.Game.WhoseTurn != Player.White ? match.Match.ChallengeeId : match.Match.ChallengerId);
}
public async Task <ChessMatchStatusModel> Move(ulong guildId, ulong channelId, IUser player, string rawMove)
{
var rankToRowMap = new Dictionary <int, int>
{
{ 1, 7 },
{ 2, 6 },
{ 3, 5 },
{ 4, 4 },
{ 5, 3 },
{ 6, 2 },
{ 7, 1 },
{ 8, 0 }
};
var moveInput = rawMove.Replace(" ", "").ToUpper();
if (!Regex.IsMatch(moveInput, "^[A-H][1-8][A-H][1-8][Q|N|B|R]?$"))
{
throw new ChessException("Error parsing move. Example move: a2a4");
}
var match = _chessHelper.GetMatch(guildId, channelId, player.Id);
if (match == null)
{
throw new ChessException("You are not currently in a game");
}
var moves = match.HistoryList.Select(x => x.Move).ToList();
var game = moves.Count != 0
? new ChessGame(moves, true)
: new ChessGame();
var whoseTurn = game.WhoseTurn;
var otherPlayer = whoseTurn == Player.White ? Player.Black : Player.White;
if (whoseTurn == Player.White && player.Id != match.ChallengerId ||
whoseTurn == Player.Black && player.Id != match.ChallengeeId)
{
throw new ChessException("It's not your turn.");
}
var sourceX = moveInput[0].ToString();
var sourceY = moveInput[1].ToString();
var destX = moveInput[2].ToString();
var destY = moveInput[3].ToString();
var positionEnumValues = (IEnumerable <File>)Enum.GetValues(typeof(File));
var enumValues = positionEnumValues.ToList();
var sourcePositionX = enumValues.Single(x => x.ToString("g") == sourceX);
var destPositionX = enumValues.Single(x => x.ToString("g") == destX);
var originalPosition = new Position(sourcePositionX, int.Parse(sourceY));
var newPosition = new Position(destPositionX, int.Parse(destY));
var board = game.GetBoard();
var file = int.Parse(sourcePositionX.ToString("d"));
var collumn = rankToRowMap[int.Parse(sourceY)];
if (board[collumn][file] == null)
{
throw new ChessException("Invalid move.");
}
var pieceChar = board[collumn][file].GetFenCharacter();
var isPawn = pieceChar.ToString().ToLower() == "p";
char?promotion;
if (destY != "1" && destY != "8" || !isPawn)
{
promotion = null;
}
else
{
promotion = moveInput[4].ToString().ToLower()[0];
}
var move = new Move(originalPosition, newPosition, whoseTurn, promotion);
if (!game.IsValidMove(move))
{
throw new ChessException("Invalid move.");
}
var chessMove = new ChessMoveModel
{
Move = move,
MovedfenChar = pieceChar,
MoveDate = DateTime.Now,
Player = whoseTurn
};
game.ApplyMove(move, true);
match.HistoryList.Add(chessMove);
var endCause = Cause.OnGoing;
if (game.IsStalemated(otherPlayer))
{
endCause = Cause.Stalemate;
}
else if (game.IsCheckmated(otherPlayer))
{
endCause = Cause.Checkmate;
}
var imageLinkValues = await DrawBoard(match);
var status = new ChessMatchStatusModel
{
Game = game,
ImageLink = imageLinkValues.ImageLink,
Status = endCause,
WinnerId = endCause == Cause.Checkmate ? (ulong?)player.Id : null,
IsCheck = game.IsInCheck(otherPlayer),
IsCheckmated = game.IsCheckmated(otherPlayer),
Match = match
};
_chessHelper.UpdateChessGame(status);
return(await Task.FromResult(status));
}
