/**
* Do the Jump, removing the piece from x1, y1 and setting the piece in x2, y2. Remove the piece
* from captureX, captureY as well. If the piece is now on their "King's Row", then promote the
* piece should be promoted to a King
*/
public void execute(final Jump jump) {
// CHECK IF ALL OF THEM ON BOARD
if (isOnBoard(jump.getX1(), jump.getX2())
&& isOnBoard(jump.getY1(), jump.getY2())
&& isOnBoard(jump.getCaptureX(), jump.getCaptureY())) {
// check if landing square is empty
if (isEmptySquare(jump.getY1(), jump.getY2())) {
Piece piece = getPiece(jump.getY1(), jump.getX1());
// check if capture piece is enemy color
if (getPiece(jump.getCaptureY(), jump.getCaptureX()).isEnemyColor(piece.getColor())) {
if (Piece.WHITE_MAN.equals(piece)) {
if (jump.getY2() == 7) {
piece = Piece.WHITE_KING;
}
} else if (Piece.RED_MAN.equals(piece)) {
if (jump.getY2() == 0) {
piece = Piece.RED_KING;
}
}
setPiece(jump.getY2(), jump.getX2(), piece);
removePiece(jump.getCaptureY(), jump.getCaptureX());
removePiece(jump.getY1(), jump.getX1());
}
}
}
}
/**
* Returns a list of all possible moves from the piece at (x,y). If there is no piece on that
* square, or the piece cannot make a legal move then return an empty list
*/
public List<Move> getMoves(final int x, final int y) {
Piece piece = getPiece(y, x);
if (piece == null) {
return new ArrayList<Move>(0);
} else {
List<Move> moves = new ArrayList<Move>(4);
if (Piece.WHITE_MAN.equals(piece)) {
if (isOnBoard(x - 1, y + 1) && isEmptySquare(x - 1, y + 1)) {
moves.add(new Move(x, y, x - 1, y + 1));
}
if (isOnBoard(x + 1, y + 1) && isEmptySquare(x + 1, y + 1)) {
moves.add(new Move(x, y, x + 1, y + 1));
}
} else if (Piece.RED_MAN.equals(piece)) {
if (isOnBoard(x - 1, y - 1) && isEmptySquare(x - 1, y - 1)) {
moves.add(new Move(x, y, x - 1, y - 1));
}
if (isOnBoard(x + 1, y - 1) && isEmptySquare(x + 1, y - 1)) {
moves.add(new Move(x, y, x + 1, y - 1));
}
} else {
if (isOnBoard(x - 1, y - 1) && isEmptySquare(x - 1, y - 1)) {
moves.add(new Move(x, y, x - 1, y - 1));
}
if (isOnBoard(x + 1, y - 1) && isEmptySquare(x + 1, y - 1)) {
moves.add(new Move(x, y, x + 1, y - 1));
}
if (isOnBoard(x - 1, y + 1) && isEmptySquare(x - 1, y + 1)) {
moves.add(new Move(x, y, x - 1, y + 1));
}
if (isOnBoard(x + 1, y + 1) && isEmptySquare(x + 1, y + 1)) {
moves.add(new Move(x, y, x + 1, y + 1));
}
}
return moves;
}
}
/**
* Returns a list of all possible jumps from the piece at (x,y). If there is no piece on that
* square, or the piece cannot make a legal jump then return an empty list
*/
public List<Jump> getJumps(final int x, final int y) {
Piece piece = getPiece(y, x);
if (piece == null) {
return new ArrayList<Jump>(0);
} else {
List<Jump> jumps = new ArrayList<Jump>();
if (Piece.WHITE_MAN.equals(piece)) {
if (isOnBoard(x - 1, y + 1)
&& isOnBoard(x - 2, y + 2)
&& !isEmptySquare(x - 1, y + 1)
&& getPiece(y + 1, x - 1).isEnemyColor(piece.getColor())
&& isEmptySquare(x - 2, y + 2)) {
jumps.add(new Jump(y, x, x - 1, y + 1, x - 2, y + 2));
}
if (isOnBoard(x + 1, y + 1)
&& isOnBoard(x + 2, y + 2)
&& !isEmptySquare(x + 1, y + 1)
&& getPiece(y + 1, x + 1).isEnemyColor(piece.getColor())
&& isEmptySquare(x + 2, y + 2)) {
jumps.add(new Jump(y, x, x + 1, y + 1, x + 2, y + 2));
}
} else if (Piece.RED_MAN.equals(piece)) {
if (isOnBoard(x - 1, y - 1)
&& isOnBoard(x - 2, y - 2)
&& !isEmptySquare(x - 1, y - 1)
&& getPiece(y - 1, x - 1).isEnemyColor(piece.getColor())
&& isEmptySquare(x - 2, y - 2)) {
jumps.add(new Jump(y, x, x - 1, y - 1, x - 2, y - 2));
}
if (isOnBoard(x + 1, y - 1)
&& isOnBoard(x + 2, y - 2)
&& !isEmptySquare(x + 1, y - 1)
&& getPiece(y - 1, x + 1).isEnemyColor(piece.getColor())
&& isEmptySquare(x + 2, y - 2)) {
jumps.add(new Jump(y, x, x + 1, y - 1, x + 2, y - 2));
}
} else {
if (isOnBoard(x - 1, y - 1)
&& isOnBoard(x - 2, y - 2)
&& !isEmptySquare(x - 1, y - 1)
&& getPiece(y - 1, x - 1).isEnemyColor(piece.getColor())
&& isEmptySquare(x - 2, y - 2)) {
jumps.add(new Jump(y, x, x - 1, y - 1, x - 2, y - 2));
}
if (isOnBoard(x + 1, y - 1)
&& isOnBoard(x + 2, y - 2)
&& !isEmptySquare(x + 1, y - 1)
&& getPiece(y - 1, x + 1).isEnemyColor(piece.getColor())
&& isEmptySquare(x + 2, y - 2)) {
jumps.add(new Jump(y, x, x + 1, y - 1, x + 2, y - 2));
}
if (isOnBoard(x - 1, y + 1)
&& isOnBoard(x - 2, y + 2)
&& !isEmptySquare(x - 1, y + 1)
&& getPiece(y + 1, x - 1).isEnemyColor(piece.getColor())
&& isEmptySquare(x - 2, y + 2)) {
jumps.add(new Jump(y, x, x - 1, y + 1, x - 2, y + 2));
}
if (isOnBoard(x + 1, y + 1)
&& isOnBoard(x + 2, y + 2)
&& !isEmptySquare(x + 1, y + 1)
&& getPiece(y + 1, x + 1).isEnemyColor(piece.getColor())
&& isEmptySquare(x + 2, y + 2)) {
jumps.add(new Jump(y, x, x + 1, y + 1, x + 2, y + 2));
}
}
return jumps;
}
}
