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<?php declare(strict_types=1);
namespace Stratadox\PuzzleSolver\Puzzle\SlidingPuzzle;
use Stratadox\PuzzleSolver\Puzzle;
use Stratadox\PuzzleSolver\PuzzleFactory;
use function explode;
use function preg_split;
use function str_replace;
final class SlidingPuzzleFactory implements PuzzleFactory
{
/** @var string */
private $separator;
public function __construct(string $separator)
$this->separator = $separator;
}
public static function make(): PuzzleFactory
return new self(',');
public function fromString(string $puzzle): Puzzle
$pieces = [];
$puzzle = str_replace(' ', '', $puzzle);
foreach (preg_split("/(\n)|(\r)/", $puzzle) as $line) {
if (empty($line)) {
continue;
$row = [];
foreach (explode($this->separator, $line) as $value) {
$row[] = (int) $value;
$pieces[] = $row;
return SlidingPuzzle::withPieces(...$pieces);
Stratadox /
PuzzleSolver
