private bool IsSquareEmpty(Square square)
{
return Board[square.X][square.Y] == null;
}
private bool PlayerHasCheckerOnSquare(Player player, Square square)
{
var checker = Board[square.X][square.Y];
return checker != null && (player != null ? checker.Player == player : checker.Player != null);
}
public MoveValidation IsValidMove(Move move)
{
var result = new MoveValidation();
if (!move.From.IsValidSquare() || !move.To.IsValidSquare()) return result;
if (!PlayerHasCheckerOnSquare(move.Player, move.From)) return result;
if (!IsSquareEmpty(move.To)) return result;
// Check if an actual move was sent
var deltaX = move.From.X - move.To.X;
var deltaY = move.From.Y - move.To.Y;
if (deltaX == 0 || deltaY == 0) return result;
if (Math.Abs(deltaX) != Math.Abs(deltaY)) return result;
if (Math.Abs(deltaX) == 2)
{
// Attempted a jump
var jumpedSquare = new Square((move.From.X + move.To.X)/2, (move.From.Y + move.To.Y)/2);
var jumpedChecker = Board[jumpedSquare.X][jumpedSquare.Y];
if (jumpedChecker == null) return result;
if (jumpedChecker.Player == move.Player) return result;
result.JumpedChecker = jumpedChecker;
result.JumpedSquare = jumpedSquare;
}
else if (Math.Abs(deltaX) != 1) return result;
else if (PlayerHasJumpAvailable(move.Player)) return result;
var checker = Board[move.From.X][move.From.Y];
if (!checker.IsKinged)
{
if (move.Player == Player.PlayerOne && deltaY > 0) return result;
if (move.Player == Player.PlayerTwo && deltaY < 0) return result;
}
result.IsValid = true;
return result;
}