/**
* {@inheritdoc}
*/
public function configureWalker(BoardWalker $walker, GameInterface $game)
{
$walker->omnidirectional(1);
$kingPosition = BoardHelper::getKingPosition($game->getBoard(), $game->getCurrentColor());
$kingColumn = BoardHelper::getColumnFromPosition($kingPosition);
$kingRow = BoardHelper::getRowFromPosition($kingPosition);
$board = $game->getBoard();
$king = $board->getSquare($kingPosition)->getPiece();
$track = $kingPosition === SquareInterface::POSITION_E1;
// check for possible castle move
if (empty($game->getMovesByPiece($king->getId()))) {
// see if one of the rooks did not make any moves
$rookCriteria = ['piece_type' => PieceInterface::TYPE_ROOK, 'piece_color' => $game->getCurrentColor()];
foreach ($board->getPiecesBy($rookCriteria) as $rookPosition => $rook) {
if (empty($game->getMovesByPiece($rook->getId()))) {
// see if there are no pieces between the king and this rook
$rookColumn = BoardHelper::getColumnFromPosition($rookPosition);
$columnDiff = abs($kingColumn - $rookColumn) - 1;
$track = $track === true && $columnDiff === 3;
if ($columnDiff > 1) {
$skip = false;
for ($x = 1; $x <= $columnDiff; $x++) {
if ($rookColumn > $kingColumn) {
$cursor = $rookColumn - $x . $kingRow;
} else {
$cursor = $rookColumn + $x . $kingRow;
}
if (null !== ($piece = $board->getSquare($cursor)->getPiece())) {
$skip = true;
break;
}
}
if ($skip) {
continue;
}
if ($kingColumn > $rookColumn) {
if ($game->getCurrentColor() === Color::WHITE) {
$walker->jump(BoardWalker::DIRECTION_LEFT, 2);
} else {
$walker->jump(BoardWalker::DIRECTION_RIGHT, 2);
}
} else {
if ($game->getCurrentColor() === Color::WHITE) {
$walker->jump(BoardWalker::DIRECTION_RIGHT, 2);
} else {
$walker->jump(BoardWalker::DIRECTION_LEFT, 2);
}
}
}
}
}
}
}
/**
* {@inheritdoc}
*/
public function configureWalker(BoardWalker $walker, GameInterface $game)
{
$pawnMoves = $game->getMovesByPiece($game->getBoard()->getSquare($walker->getStartingPosition())->getPiece()->getId());
if (empty($pawnMoves)) {
if ($game->getCurrentColor() === Color::WHITE && $walker->getRow() == 2 || $game->getCurrentColor() === Color::BLACK && $walker->getRow() == 7) {
$newPosition = $walker->peek(BoardWalker::DIRECTION_FORWARD, 1);
// allowed to make two steps forward
if ($newPosition && !$game->getBoard()->getSquare($newPosition)->getPiece()) {
$newPosition = $walker->peek(BoardWalker::DIRECTION_FORWARD, 2);
if ($newPosition && !$game->getBoard()->getSquare($newPosition)->getPiece()) {
// temporary check because walker does not seem to consider obstructing pieces of own color
$walker->jump(BoardWalker::DIRECTION_FORWARD, 2)->restart();
}
}
}
}
$walker->forward(1, false)->restart();
$forwardLeftCapture = $walker->peek(BoardWalker::DIRECTION_FORWARDLEFT, 1, null, false, true);
$forwardRightCapture = $walker->peek(BoardWalker::DIRECTION_FORWARDRIGHT, 1, null, false, true);
if ($forwardLeftCapture !== null) {
$walker->forwardLeft(1)->restart();
}
if ($forwardRightCapture !== null) {
$walker->forwardRight(1)->restart();
}
$this->walkEnPassant($walker, $game->getLastMove(false));
}