public void AddChessChange(ChessChange chessChange)
{
this.Availability = false;
try
{
PerformChessChange(chessChange);
if (chessChange.NewChess == null)
{
// remove key-value
if (this.LocationChess.ContainsKey(chessChange.Position))
{
this.LocationChess.Remove(chessChange.Position);
}
}
else
{
// change value
this.LocationChess[chessChange.Position] = chessChange.NewChess;
}
this.NewChessLocation = chessChange.Position;
}
finally
{
this.Availability = true;
}
}
public void AddChessChange(ChessChange chessChange)
{
lock (this)
{
SaveHistory();
try
{
this.Board.AddChessChange(chessChange);
// we are in the new branch of history, the old history should be removed
this.BoardRedo.Clear();
}
catch (InvalidChessOperation)
{
UndoHistory();
}
}
}
private void PerformChessChange(ChessChange instruction)
{
// chess if there has a chess
if (instruction.NewChess == null)
{
throw new InvalidChessOperation();
}
// check who's turn
if (instruction.NewChess?.Side != this.WhosTurn)
{
throw new InvalidChessOperation();
}
// check chess type
ChessType[] validChessType = new ChessType[]
{
ChessType.Bishop, ChessType.Knight, ChessType.Queen, ChessType.Rook
};
if (!validChessType.Contains(instruction.NewChess.Type))
{
throw new InvalidChessOperation();
}
// promotion
if (instruction.Position.Y == 0 && instruction.NewChess?.Side == PlayerSide.White ||
instruction.Position.Y == 7 && instruction.NewChess?.Side == PlayerSide.Black)
{
}
else
{
throw new InvalidChessOperation();
}
// switch turn
this.WhosTurn = GetOppositeSide(instruction.NewChess.Side);
this.IsDuringPromotion = false;
// ~~mark check~~
}