public Move Parse(string algebraicMove)
{
var match = _regex.Match(algebraicMove);
var move = new Move();
if (match.Length == 0)
{
move.HasError = true;
move.ErrorMessage = "Failed to match expected structure";
return move;
}
move.CastleType = CastleType.GetFor(match.Groups[Castle].Value);
move.IsCastle = move.CastleType != null;
if (!move.IsCastle)
{
move.PieceType = PieceType.GetFor(match.Groups[Piece].Value);
move.SourceFile = match.Groups[SourceFile].Value.Length == 0 ? null : File.GetFor(match.Groups[SourceFile].Value[0]);
move.SourceRow = Row.GetFor(match.Groups[SourceRow].Value);
move.IsCapture = !match.Groups[Capture].Value.IsNullOrEmpty();
move.DestinationFile = match.Groups[DestinationFile].Value.Length == 0 ? null : File.GetFor(match.Groups[DestinationFile].Value[0]);
move.DestinationRow = Row.GetFor(match.Groups[Destinationrow].Value);
if (move.PieceType == PieceType.Pawn)
{
move.PromotionPiece = match.Groups[Promotionpiece].Value.Length == 0 ? null : PieceType.GetFor(match.Groups[Promotionpiece].Value[0]);
move.IsPromotion = move.PromotionPiece != null;
}
if (move.IsCapture)
{
move.IsEnPassantCapture = !match.Groups[EnPassant].Value.IsNullOrEmpty();
}
if (!move.PieceType.IsLegal(new Position
{
File = move.SourceFile,
Row = move.SourceRow
}, move.IsCapture, new Position
{
File = move.DestinationFile,
Row = move.DestinationRow
}))
{
move.HasError = true;
move.ErrorMessage = "The source and destination are illegal for this piece type";
}
}
move.IsCheck = !match.Groups[Check].Value.IsNullOrEmpty();
if (move.IsCheck)
{
move.IsDoubleCheck = !match.Groups[DoubleCheck].Value.IsNullOrEmpty();
}
else
{
move.IsMate = !match.Groups[Mate].Value.IsNullOrEmpty();
}
return move;
}
private static void Verify(Move move, Move expected)
{
move.HasError.ShouldBeEqualTo(expected.HasError, "has error");
move.PieceType.ShouldBeEqualTo(expected.PieceType, "piece type");
move.SourceFile.ShouldBeEqualTo(expected.SourceFile, "source file");
move.SourceRow.ShouldBeEqualTo(expected.SourceRow, "source row");
move.DestinationFile.ShouldBeEqualTo(expected.DestinationFile, "destination file");
move.DestinationRow.ShouldBeEqualTo(expected.DestinationRow, "destination row");
move.IsCapture.ShouldBeEqualTo(expected.IsCapture, "is capture");
move.IsEnPassantCapture.ShouldBeEqualTo(expected.IsEnPassantCapture, "is en passant capture");
move.IsPromotion.ShouldBeEqualTo(expected.IsPromotion, "is promotion");
move.PromotionPiece.ShouldBeEqualTo(expected.PromotionPiece, "promotion piece");
move.IsCastle.ShouldBeEqualTo(expected.IsCastle, "is castle");
move.CastleType.ShouldBeEqualTo(expected.CastleType, "castle type");
move.IsCheck.ShouldBeEqualTo(expected.IsCheck, "is check");
move.IsDoubleCheck.ShouldBeEqualTo(expected.IsDoubleCheck, "is double check");
move.IsMate.ShouldBeEqualTo(expected.IsMate, "is mate");
}