/// <summary>
/// Undo the last command that has been done
/// </summary>
/// <returns>The last command, null if there is none</returns>
public ICompensableCommand Undo()
{
if (_undoCommands.Count == 0)
{
return(null);
}
ICompensableCommand command = _undoCommands.Pop();
command.Compensate();
_redoCommands.Push(command);
return(command);
}
public void Compensate()
{
_kingCommand.Compensate();
_rookCommand.Compensate();
}
public void Compensate()
{
_secondMove.Compensate();
_firstMove.Compensate();
}
public void Compensate()
{
_board.SquareAt(Move.TargetCoordinate).Piece = _oldPawn;
_moveCommand.Compensate();
}