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<?php |
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namespace Shlinkio\Shlink\Core\Action; |
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use Acelaya\ZsmAnnotatedServices\Annotation\Inject; |
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use Psr\Http\Message\ResponseInterface as Response; |
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use Psr\Http\Message\ServerRequestInterface as Request; |
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use Shlinkio\Shlink\Common\Exception\PreviewGenerationException; |
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use Shlinkio\Shlink\Common\Service\PreviewGenerator; |
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use Shlinkio\Shlink\Common\Service\PreviewGeneratorInterface; |
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use Shlinkio\Shlink\Common\Util\ResponseUtilsTrait; |
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use Shlinkio\Shlink\Core\Exception\InvalidShortCodeException; |
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use Shlinkio\Shlink\Core\Service\UrlShortener; |
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use Shlinkio\Shlink\Core\Service\UrlShortenerInterface; |
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use Zend\Stratigility\MiddlewareInterface; |
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class PreviewAction implements MiddlewareInterface |
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{ |
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use ResponseUtilsTrait; |
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/** |
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* @var PreviewGeneratorInterface |
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*/ |
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private $previewGenerator; |
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/** |
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* @var UrlShortenerInterface |
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*/ |
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private $urlShortener; |
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/** |
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* PreviewAction constructor. |
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* @param PreviewGeneratorInterface $previewGenerator |
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* @param UrlShortenerInterface $urlShortener |
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* |
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* @Inject({PreviewGenerator::class, UrlShortener::class}) |
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*/ |
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public function __construct(PreviewGeneratorInterface $previewGenerator, UrlShortenerInterface $urlShortener) |
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{ |
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$this->previewGenerator = $previewGenerator; |
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$this->urlShortener = $urlShortener; |
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} |
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/** |
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* Process an incoming request and/or response. |
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* |
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* Accepts a server-side request and a response instance, and does |
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* something with them. |
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* |
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* If the response is not complete and/or further processing would not |
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* interfere with the work done in the middleware, or if the middleware |
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* wants to delegate to another process, it can use the `$out` callable |
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* if present. |
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* |
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* If the middleware does not return a value, execution of the current |
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* request is considered complete, and the response instance provided will |
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* be considered the response to return. |
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* |
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* Alternately, the middleware may return a response instance. |
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* |
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* Often, middleware will `return $out();`, with the assumption that a |
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* later middleware will return a response. |
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* |
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* @param Request $request |
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* @param Response $response |
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* @param null|callable $out |
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* @return null|Response |
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*/ |
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public function __invoke(Request $request, Response $response, callable $out = null) |
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{ |
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$shortCode = $request->getAttribute('shortCode'); |
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try { |
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$url = $this->urlShortener->shortCodeToUrl($shortCode); |
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if (! isset($url)) { |
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return $out($request, $response->withStatus(404), 'Not found'); |
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} |
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$imagePath = $this->previewGenerator->generatePreview($url); |
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return $this->generateImageResponse($imagePath); |
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} catch (InvalidShortCodeException $e) { |
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return $out($request, $response->withStatus(404), 'Not found'); |
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} catch (PreviewGenerationException $e) { |
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return $out($request, $response->withStatus(500), 'Preview generation error'); |
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} |
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} |
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} |
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shlinkio /
shlink
