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Piece.java
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206 lines (165 loc) · 5.92 KB
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import java.util.ArrayList;
public abstract class Piece implements Comparable<Piece> {
private Square position;
private int color;
public Piece(Square position, int color) {
this.position = position;
this.color = color;
this.position.setPiece(this);
}
public abstract ArrayList<Square> getValidSquares();
public ArrayList<Square> getAtackSquares() {
ArrayList<Square> result = new ArrayList<Square>();
ArrayList<Square> validSquares = this.getValidSquares();
int opponentColor = (this.color == PieceColor.BLACK) ? PieceColor.WHITE : PieceColor.BLACK;
for(Square square : validSquares)
if(square.getPiece() != null && square.getPiece().getColor() == opponentColor)
result.add(square);
return result;
}
public ArrayList<Square> getCaptureFreeSquares() {
ArrayList<Square> result = new ArrayList<Square>();
ArrayList<Square> validSquares = this.getValidSquares();
int opponentColor = (this.color == PieceColor.BLACK) ? PieceColor.WHITE : PieceColor.BLACK;
for(Square square : validSquares) {
if(Piece.canBeCaptured(this, square, opponentColor) == null)
result.add(square);
}
return result;
}
public static Square checkDirection(Piece piece, Square square, int letter, int number,
int opponentColor, int... opponents) {
Square intermediate = square;
while(Board.isSquareValid(intermediate.getLetter() + letter,
intermediate.getNumber() + number)) {
intermediate = Board.translate(intermediate.getLetter() + letter,
intermediate.getNumber() + number);
if(intermediate.getPiece() != null) {
if(intermediate.getPiece().getColor() == opponentColor) {
for(int opponent : opponents) {
if(PieceType.getType(intermediate.getPiece()) == opponent)
return intermediate;
}
break;
}
if(intermediate.getPiece() == piece)
continue;
break;
}
}
intermediate = square;
while(Board.isSquareValid(intermediate.getLetter() - letter,
intermediate.getNumber() - number)) {
intermediate = Board.translate(intermediate.getLetter() - letter,
intermediate.getNumber() - number);
if(intermediate.getPiece() != null) {
if(intermediate.getPiece().getColor() == opponentColor) {
for(int opponent : opponents) {
if(PieceType.getType(intermediate.getPiece()) == opponent)
return intermediate;
}
break;
}
if(intermediate.getPiece() == piece)
continue;
break;
}
}
return null;
}
public static Square canBeCaptured(Piece piece, Square square, int opponentColor) {
int k = 0;
int number = square.getNumber();
int letter = square.getLetter();
int myColor = (opponentColor == PieceColor.BLACK) ? PieceColor.WHITE : PieceColor.BLACK;
Square intermediate;
if(myColor == PieceColor.WHITE) {
if(Board.isSquareValid(letter + 1, number + 1)) {
intermediate = Board.translate(letter + 1, number + 1);
if(intermediate.getPiece() != null
&& intermediate.getPiece().getColor() == opponentColor
&& PieceType.getType(intermediate.getPiece()) == PieceType.PAWN)
return intermediate;
}
if(Board.isSquareValid(letter - 1, number + 1)) {
intermediate = Board.translate(letter - 1, number + 1);
if(intermediate.getPiece() != null
&& intermediate.getPiece().getColor() == opponentColor
&& PieceType.getType(intermediate.getPiece()) == PieceType.PAWN)
return intermediate;
}
}
else {
if(Board.isSquareValid(letter + 1, number - 1)) {
intermediate = Board.translate(letter + 1, number - 1);
if(intermediate.getPiece() != null
&& intermediate.getPiece().getColor() == opponentColor
&& PieceType.getType(intermediate.getPiece()) == PieceType.PAWN)
return intermediate;
}
if(Board.isSquareValid(letter - 1, number - 1)) {
intermediate = Board.translate(letter - 1, number - 1);
if(intermediate.getPiece() != null
&& intermediate.getPiece().getColor() == opponentColor
&& PieceType.getType(intermediate.getPiece()) == PieceType.PAWN)
return intermediate;
}
}
for(int i = -1; i <= 1; i++) {
for(int j = -1; j <= 1; j++) {
if(!(i == 0 && j == 0)) {
if(Board.isSquareValid(letter + i, number + j)) {
intermediate = Board.translate(letter + i, number + j);
if(intermediate.getPiece() != null
&& intermediate.getPiece().getColor() == opponentColor
&& PieceType.getType(intermediate.getPiece()) == PieceType.KING)
return intermediate;
}
if(k < 4) {
Square s = null;
if(Math.abs(i) == Math.abs(j)) {
s = Piece.checkDirection(piece, square, i, j, opponentColor, PieceType.QUEEN, PieceType.BISHOP);
if(s != null)
return s;
}
else {
s = Piece.checkDirection(piece, square, i, j, opponentColor, PieceType.QUEEN, PieceType.ROOK);
if(s != null)
return s;
}
}
k++;
}
}
}
for(int i = -2; i <= 2; i++) {
for(int j = -2; j <= 2; j++) {
if(Math.abs(i) != Math.abs(j) && i != 0 && j != 0) {
if(Board.isSquareValid(letter + i, number + j)) {
intermediate = Board.translate(letter + i, number + j);
if(intermediate.getPiece() != null
&& intermediate.getPiece().getColor() == opponentColor
&& PieceType.getType(intermediate.getPiece()) == PieceType.KNIGHT)
return intermediate;
}
}
}
}
return null;
}
public Square getPosition() {
return this.position;
}
public void setPosition(Square position) {
this.position = position;
}
public int getColor() {
return this.color;
}
@Override
public int compareTo(Piece piece) {
if(this.position.compareTo(piece.getPosition()) == 0 && this.color == piece.color)
return 0;
return -1;
}
}