private CheckersMove IsMoveValidCore(CheckersPiece piece, Point[] path)
{
// Failsafe .. be sure piece is valid
if (piece == null)
{
throw new ArgumentNullException("piece");
}
if (!pieces.Contains(piece))
{
throw new ArgumentException("Argument 'piece' must be a piece in play to the current game.");
}
// Be sure piece can be moved
if (!CanMovePiece(piece))
{
throw new ArgumentException("Checkers piece cannot be moved on this turn.", "piece");
}
CheckersMove move = CheckersMove.FromPath(this, piece, path);
if (!move.Moved)
{
return(null); // No movement
}
if (move.MustMove)
{
return(null); // A move must yet be made
}
// Success
return(move);
}
/// <summary>Creates a duplicate Checkers game object.</summary>
/// <returns>The new Checkers move object.</returns>
public CheckersGame Clone()
{
CheckersGame game = new CheckersGame(optionalJumping);
game.isReadOnly = isReadOnly;
game.isPlaying = isPlaying;
game.firstMove = firstMove;
game.turn = turn;
game.winner = winner;
game.pieces = new CheckersPieceCollection();
game.board = new CheckersPiece[BoardSize.Width, BoardSize.Height];
foreach (CheckersPiece piece in pieces)
{
CheckersPiece newPiece = new CheckersPiece(game, piece.Player, piece.Rank, piece.Location, piece.InPlay);
game.board[newPiece.Location.X, newPiece.Location.Y] = newPiece;
game.pieces.Add(newPiece);
}
int lastMovePieceIndex = ((lastMove != null) ? (pieces.IndexOf(lastMove.Piece)) : (-1));
game.lastMove = ((lastMovePieceIndex != -1) ? (CheckersMove.FromPath(game, game.pieces[lastMovePieceIndex], lastMove.Path)) : (null));
return(game);
}