shlink/module/Core/src/Action/QrCodeAction.php
2019-08-01 19:49:54 +02:00

90 lines
2.9 KiB
PHP

<?php
declare(strict_types=1);
namespace Shlinkio\Shlink\Core\Action;
use Endroid\QrCode\QrCode;
use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;
use Shlinkio\Shlink\Common\Response\QrCodeResponse;
use Shlinkio\Shlink\Core\Action\Util\ErrorResponseBuilderTrait;
use Shlinkio\Shlink\Core\Exception\EntityDoesNotExistException;
use Shlinkio\Shlink\Core\Exception\InvalidShortCodeException;
use Shlinkio\Shlink\Core\Service\UrlShortenerInterface;
use Zend\Expressive\Router\Exception\RuntimeException;
use Zend\Expressive\Router\RouterInterface;
class QrCodeAction implements MiddlewareInterface
{
use ErrorResponseBuilderTrait;
private const DEFAULT_SIZE = 300;
private const MIN_SIZE = 50;
private const MAX_SIZE = 1000;
/** @var RouterInterface */
private $router;
/** @var UrlShortenerInterface */
private $urlShortener;
/** @var LoggerInterface */
private $logger;
public function __construct(
RouterInterface $router,
UrlShortenerInterface $urlShortener,
?LoggerInterface $logger = null
) {
$this->router = $router;
$this->urlShortener = $urlShortener;
$this->logger = $logger ?: new NullLogger();
}
/**
* Process an incoming server request and return a response, optionally delegating
* to the next middleware component to create the response.
*
* @param Request $request
* @param RequestHandlerInterface $handler
*
* @return Response
* @throws \InvalidArgumentException
* @throws RuntimeException
*/
public function process(Request $request, RequestHandlerInterface $handler): Response
{
// Make sure the short URL exists for this short code
$shortCode = $request->getAttribute('shortCode');
try {
$this->urlShortener->shortCodeToUrl($shortCode);
} catch (InvalidShortCodeException | EntityDoesNotExistException $e) {
$this->logger->warning('An error occurred while creating QR code. {e}', ['e' => $e]);
return $this->buildErrorResponse($request, $handler);
}
$path = $this->router->generateUri('long-url-redirect', ['shortCode' => $shortCode]);
$size = $this->getSizeParam($request);
$qrCode = new QrCode((string) $request->getUri()->withPath($path)->withQuery(''));
$qrCode->setSize($size)
->setPadding(0);
return new QrCodeResponse($qrCode);
}
/**
* @param Request $request
* @return int
*/
private function getSizeParam(Request $request): int
{
$size = (int) $request->getAttribute('size', self::DEFAULT_SIZE);
if ($size < self::MIN_SIZE) {
return self::MIN_SIZE;
}
return $size > self::MAX_SIZE ? self::MAX_SIZE : $size;
}
}