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<?php declare(strict_types=1);
namespace Stratadox\PuzzleSolver\Renderer;
use Stratadox\PuzzleSolver\Solution;
use Stratadox\PuzzleSolver\SolutionRenderer;
use function assert;
use function fopen;
use function fwrite;
use function is_resource;
use function usleep;
/**
* PuzzleStates-to-file Renderer
*
* Renders each of the in-between states on the path that led to the final
* solution to a file.
* @author Stratadox
*/
final class PuzzleStatesToFileRenderer implements SolutionRenderer
{
/** @var resource */
private $output;
/** @var string */
private $separator;
/** @var int */
private $timeout;
private function __construct($outputStream, string $separator, int $timeout)
$this->output = $outputStream;
$this->separator = $separator;
$this->timeout = $timeout;
assert(is_resource($outputStream));
}
public static function fromFilenameAndSeparator(
string $fileName,
string $separator,
int $timeout = 0
): SolutionRenderer {
return new self(fopen($fileName, 'wb'), $separator, $timeout);
public function render(Solution $solution): void
$puzzle = $solution->original();
$this->log($puzzle->representation());
usleep($this->timeout);
foreach ($solution->moves() as $move) {
$puzzle = $puzzle->afterMaking($move);
$this->log($this->separator);
private function log(string $entry): void
fwrite($this->output, $entry);
Stratadox /
PuzzleSolver
