<?php 
 
/* 
 * This file is part of the `liip/LiipImagineBundle` project. 
 * 
 * (c) https://github.com/liip/LiipImagineBundle/graphs/contributors 
 * 
 * For the full copyright and license information, please view the LICENSE.md 
 * file that was distributed with this source code. 
 */ 
 
namespace Liip\ImagineBundle\Controller; 
 
use Imagine\Exception\RuntimeException; 
use Liip\ImagineBundle\Config\Controller\ControllerConfig; 
use Liip\ImagineBundle\Exception\Binary\Loader\NotLoadableException; 
use Liip\ImagineBundle\Exception\Imagine\Filter\NonExistingFilterException; 
use Liip\ImagineBundle\Imagine\Cache\Helper\PathHelper; 
use Liip\ImagineBundle\Imagine\Cache\SignerInterface; 
use Liip\ImagineBundle\Imagine\Data\DataManager; 
use Liip\ImagineBundle\Service\FilterService; 
use Symfony\Component\HttpFoundation\Exception\BadRequestException; 
use Symfony\Component\HttpFoundation\RedirectResponse; 
use Symfony\Component\HttpFoundation\Request; 
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException; 
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException; 
use Symfony\Component\HttpKernel\Kernel; 
 
class ImagineController 
{ 
    /** 
     * @var FilterService 
     */ 
    private $filterService; 
 
    /** 
     * @var DataManager 
     */ 
    private $dataManager; 
 
    /** 
     * @var SignerInterface 
     */ 
    private $signer; 
 
    /** 
     * @var ControllerConfig 
     */ 
    private $controllerConfig; 
 
    public function __construct( 
        FilterService $filterService, 
        DataManager $dataManager, 
        SignerInterface $signer, 
        ?ControllerConfig $controllerConfig = null 
    ) { 
        $this->filterService = $filterService; 
        $this->dataManager = $dataManager; 
        $this->signer = $signer; 
 
        if (null === $controllerConfig) { 
            @trigger_error(\sprintf( 
                'Instantiating "%s" without a forth argument of type "%s" is deprecated since 2.2.0 and will be required in 3.0.', self::class, ControllerConfig::class 
            ), E_USER_DEPRECATED); 
        } 
 
        $this->controllerConfig = $controllerConfig ?? new ControllerConfig(301); 
    } 
 
    /** 
     * This action applies a given filter to a given image, saves the image and redirects the browser to the stored 
     * image. 
     * 
     * The resulting image is cached so subsequent requests will redirect to the cached image instead applying the 
     * filter and storing the image again. 
     * 
     * @param string $path 
     * @param string $filter 
     * 
     * @throws RuntimeException 
     * @throws NotFoundHttpException 
     * 
     * @return RedirectResponse 
     */ 
    public function filterAction(Request $request, $path, $filter) 
    { 
        $path = PathHelper::urlPathToFilePath($path); 
        // TODO once we limit `symfony/http-foundation` to 6.4 or newer, use `$request->query->getString()` 
        $resolver = $request->query->has('resolver') ? (string) $request->query->get('resolver') : null; 
 
        return $this->createRedirectResponse(function () use ($path, $filter, $resolver, $request) { 
            return $this->filterService->getUrlOfFilteredImage( 
                $path, 
                $filter, 
                $resolver, 
                $this->isWebpSupported($request) 
            ); 
        }, $path, $filter); 
    } 
 
    /** 
     * This action applies a given filter -merged with additional runtime filters- to a given image, saves the image and 
     * redirects the browser to the stored image. 
     * 
     * The resulting image is cached so subsequent requests will redirect to the cached image instead applying the 
     * filter and storing the image again. 
     * 
     * @param string $hash 
     * @param string $path 
     * @param string $filter 
     * 
     * @throws RuntimeException 
     * @throws BadRequestHttpException 
     * @throws NotFoundHttpException 
     * 
     * @return RedirectResponse 
     */ 
    public function filterRuntimeAction(Request $request, $hash, $path, $filter) 
    { 
        $resolver = $request->query->has('resolver') ? (string) $request->query->get('resolver') : null; 
        $path = PathHelper::urlPathToFilePath($path); 
        $runtimeConfig = $this->getFiltersBc($request); 
 
        if (true !== $this->signer->check($hash, $path, $runtimeConfig)) { 
            throw new BadRequestHttpException(\sprintf('Signed url does not pass the sign check for path "%s" and filter "%s" and runtime config %s', $path, $filter, json_encode($runtimeConfig))); 
        } 
 
        return $this->createRedirectResponse(function () use ($path, $filter, $runtimeConfig, $resolver, $request) { 
            return $this->filterService->getUrlOfFilteredImageWithRuntimeFilters( 
                $path, 
                $filter, 
                $runtimeConfig, 
                $resolver, 
                $this->isWebpSupported($request) 
            ); 
        }, $path, $filter, $hash); 
    } 
 
    private function getFiltersBc(Request $request): array 
    { 
        if (version_compare(Kernel::VERSION, '5.1', '>=')) { 
            try { 
                return $request->query->all('filters'); 
            } catch (BadRequestException $e) { 
                // for strict BC - BadRequestException seems more suited to this situation. 
                // remove the try-catch in version 3 
                throw new NotFoundHttpException(\sprintf('Filters must be an array. Value was "%s"', $request->query->get('filters'))); 
            } 
        } 
 
        $runtimeConfig = $request->query->get('filters', []); 
 
        if (!\is_array($runtimeConfig)) { 
            throw new NotFoundHttpException(\sprintf('Filters must be an array. Value was "%s"', $runtimeConfig)); 
        } 
 
        return $runtimeConfig; 
    } 
 
    private function createRedirectResponse(\Closure $url, string $path, string $filter, ?string $hash = null): RedirectResponse 
    { 
        try { 
            return new RedirectResponse($url(), $this->controllerConfig->getRedirectResponseCode()); 
        } catch (NotLoadableException $exception) { 
            if (null !== $this->dataManager->getDefaultImageUrl($filter)) { 
                return new RedirectResponse($this->dataManager->getDefaultImageUrl($filter)); 
            } 
 
            throw new NotFoundHttpException(\sprintf('Source image for path "%s" could not be found', $path), $exception); 
        } catch (NonExistingFilterException $exception) { 
            throw new NotFoundHttpException(\sprintf('Requested non-existing filter "%s"', $filter), $exception); 
        } catch (RuntimeException $exception) { 
            throw new \RuntimeException(vsprintf('Unable to create image for path "%s" and filter "%s". Message was "%s"', [$hash ? \sprintf('%s/%s', $hash, $path) : $path, $filter, $exception->getMessage()]), 0, $exception); 
        } 
    } 
 
    private function isWebpSupported(Request $request): bool 
    { 
        return false !== mb_stripos($request->headers->get('accept', ''), 'image/webp'); 
    } 
}