public static IEnumerable <Tuple <ViewerBoard, BoardHistoryItem> > EnumerateWithBoard(this BoardHistory boardHistory, ViewerBoard currentBoard)
{
// Create a copy of the current board
ViewerBoard board = new ViewerBoard(currentBoard.ToString());
List <BoardHistoryItem> reversedHistory = new List <BoardHistoryItem>(boardHistory);
reversedHistory.Reverse();
// "Undo" moves in the boardHistory
foreach (BoardHistoryItem item in reversedHistory)
{
board.SimulateUndo(item);
}
// "Play" forward returning the board state along the way
foreach (BoardHistoryItem item in boardHistory)
{
yield return(new Tuple <ViewerBoard, BoardHistoryItem>(board, item));
board.SimulatePlay(item.Move);
}
}
public static string ToBoardSpaceMoveString(ViewerBoard board, Move move)
{
if (null == board)
{
throw new ArgumentNullException("board");
}
if (null == move)
{
throw new ArgumentNullException("move");
}
if (move.IsPass)
{
return("pass");
}
if (move.Color != board.CurrentTurnColor)
{
return(null);
}
string startPiece = ToBoardSpacePieceName(move.PieceName);
if (board.CurrentTurn == 0)
{
return(startPiece);
}
else
{
string endPiece = "";
if (move.Position.Stack > 0)
{
// On top of board
PieceName pieceBelow = board.GetPiece(move.Position.GetBelow());
endPiece = ToBoardSpacePieceName(pieceBelow);
}
else
{
// Find neighbor to move.Position
foreach (Direction dir in EnumUtils.Directions)
{
// Found a neighbor!
Position pos = move.Position.NeighborAt(dir);
PieceName neighbor = board.GetPieceOnTop(pos);
if (neighbor == move.PieceName)
{
Position posBelow = board.GetPiecePosition(neighbor).GetBelow();
neighbor = null != posBelow?board.GetPiece(posBelow) : PieceName.INVALID;
}
if (neighbor != PieceName.INVALID)
{
endPiece = ToBoardSpacePieceName(neighbor);
switch (dir)
{
case Direction.Up:
endPiece = endPiece + @"\";
break;
case Direction.UpRight:
endPiece = @"/" + endPiece;
break;
case Direction.DownRight:
endPiece = @"-" + endPiece;
break;
case Direction.Down:
endPiece = @"\" + endPiece;
break;
case Direction.DownLeft:
endPiece = endPiece + @"/";
break;
case Direction.UpLeft:
endPiece = endPiece + @"-";
break;
}
break;
}
}
}
return(string.IsNullOrWhiteSpace(endPiece) ? startPiece : string.Format("{0} {1}", startPiece, endPiece));
}
}
