public static boolean isLineAvailableBetweenBoxes(Board board, Box box1, Box box2) {
if (!areNeighborBoxes(box1, box2)) return false;
int x = (box1.getColumn() + box2.getColumn()) / 2;
int y = (box1.getRow() + box2.getRow()) / 2;
Line line = board.getLineByCoordinate(x, y);
return line != null && line.getOwner() == null;
}
public static List<Box> getSurroundingBoxes(Board board, Box box) {
int x = box.getColumn();
int y = box.getRow();
int surroundingBoxes[][] = {
{x - 2, y},
{x + 2, y},
{x, y - 2},
{x, y + 2}
};
return Arrays.stream(surroundingBoxes)
.map(coords -> board.getBoxByCoordinate(coords[0], coords[1]))
.filter(b -> b != null)
.collect(Collectors.toList());
}
public static List<Line> getLinesSurroundingBox(Board board, Box box) {
int x = box.getColumn();
int y = box.getRow();
int surroundingLines[][] = {
{x - 1, y},
{x + 1, y},
{x, y - 1},
{x, y + 1}
};
return Arrays.stream(surroundingLines)
.map(coords -> board.getLineByCoordinate(coords[0], coords[1]))
.filter(line -> line != null)
.collect(Collectors.toList());
}
public static boolean areNeighborBoxes(Box box1, Box box2) {
return (box1.getRow() == box2.getRow() && Math.abs(box1.getColumn() - box2.getColumn()) == 2)
|| (box1.getColumn() == box2.getColumn() && Math.abs(box1.getRow() - box2.getRow()) == 2);
}