76 lines
2.3 KiB
Java
76 lines
2.3 KiB
Java
package dev.kske.chess.board;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Project: <strong>Chess</strong><br>
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* File: <strong>King.java</strong><br>
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* Created: <strong>01.07.2019</strong><br>
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* Author: <strong>Kai S. K. Engelbart</strong>
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*/
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public class King extends Piece {
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public King(Color color, Board board) {
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super(color, board);
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}
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@Override
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public boolean isValidMove(Move move) {
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// Castling
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if (move.xDist == 2 && move.yDist == 0) {
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if (canCastleKingside()) {
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move.type = Move.Type.CASTLING;
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return true;
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}
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if (canCastleQueenside()) {
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move.type = Move.Type.CASTLING;
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return true;
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}
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}
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return move.xDist <= 1 && move.yDist <= 1 && checkDestination(move);
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}
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public boolean canCastleKingside() {
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if (getMoveCounter() == 0) {
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int y = getColor() == Color.WHITE ? 7 : 0;
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Position rookPos = new Position(7, y);
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Piece rook = board.get(rookPos);
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return rook != null && rook.getType() == Type.ROOK && rook.getMoveCounter() == 0
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&& isFreePath(new Move(new Position(4, y), new Position(6, y)));
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} else return false;
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}
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public boolean canCastleQueenside() {
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if (getMoveCounter() == 0) {
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int y = getColor() == Color.WHITE ? 7 : 0;
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Position rookPos = new Position(0, y);
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Piece rook = board.get(rookPos);
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return rook != null && rook.getType() == Type.ROOK && rook.getMoveCounter() == 0
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&& isFreePath(new Move(new Position(4, y), new Position(1, y)));
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} else return false;
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}
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@Override
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protected List<Move> getPseudolegalMoves(Position pos) {
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List<Move> moves = new ArrayList<>();
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for (int i = Math.max(0, pos.x - 1); i < Math.min(8, pos.x + 2); i++)
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for (int j = Math.max(0, pos.y - 1); j < Math.min(8, pos.y + 2); j++)
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if (i != pos.x || j != pos.y) {
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Move move = new Move(pos, new Position(i, j));
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if (board.getDest(move) == null || board.getDest(move).getColor() != getColor()) moves.add(move);
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}
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// Castling
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// TODO: Condition: cannot castle out of, through or into check
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if (canCastleKingside()) moves.add(new Move(pos, new Position(6, pos.y), Move.Type.CASTLING));
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if (canCastleQueenside()) moves.add(new Move(pos, new Position(2, pos.y), Move.Type.CASTLING));
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return moves;
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}
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@Override
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public Type getType() { return Type.KING; }
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}
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