/**
* @param BoardWalker $walker
* @param MoveInterface $lastMove
*/
private function walkEnPassant(BoardWalker $walker, MoveInterface $lastMove = null)
{
$lastEnemyPiece = $lastMove ? $walker->getBoard()->getSquare($lastMove->getTo())->getPiece() : null;
if ($lastMove === null || $lastEnemyPiece === null || $lastEnemyPiece->getType() !== PieceInterface::TYPE_PAWN) {
return;
}
$leftToPosition = $walker->peek(BoardWalker::DIRECTION_LEFT, 1, null, true, false);
$rightToPosition = $walker->peek(BoardWalker::DIRECTION_RIGHT, 1, null, true, false);
if ($leftToPosition !== null) {
if (abs(BoardHelper::getRowFromPosition($lastMove->getFrom()) - BoardHelper::getRowFromPosition($leftToPosition)) !== 2) {
return;
}
if ($lastMove->getTo() === $leftToPosition) {
// en passant left
$walker->forwardLeft(1, false)->restart();
}
}
if ($rightToPosition !== null) {
if (abs(BoardHelper::getRowFromPosition($lastMove->getFrom()) - BoardHelper::getRowFromPosition($rightToPosition)) !== 2) {
return;
}
if ($lastMove->getTo() === $rightToPosition) {
// en passant left
$walker->forwardRight(1, false)->restart();
}
}
}
public function testGetBoard()
{
$this->assertInstanceOf('CL\\Windmill\\Model\\Board\\Board', $this->boardWalker->getBoard());
}
