Correctif frontend

ShopBundle/Twig/FrontendTwigExtension.php

 use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
 use Symfony\Component\Form\FormFactoryInterface;
 use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\HttpKernel\KernelInterface;
 use Symfony\Component\Security\Core\Security;
 use Twig\Extension\AbstractExtension;
 use Twig\TwigFilter;
         protected $productFamilyRepository;
         protected $liipCacheHelper;
         protected $parameterBag;
+        protected $kernel;
 
         public function __construct(EntityManagerInterface $em, Security $security, MerchantUtilsInterface $merchantUtils,
                                     FormFactoryInterface $formFactory, RequestStack $requestStack, CacheManager $liipCacheHelper,
-                                    ParameterBagInterface $parameterBag)
+                                    ParameterBagInterface $parameterBag, KernelInterface $kernel)
         {
                 $this->em = $em;
                 $this->security = $security;
                 $this->productFamilyRepository = $this->em->getRepository($this->em->getClassMetadata(ProductFamilyInterface::class)->getName());
                 $this->liipCacheHelper = $liipCacheHelper;
                 $this->parameterBag = $parameterBag;
+                $this->kernel = $kernel;
         }
 
         public function getFunctions()
                 return [
                         new TwigFilter('format_price', [$this, 'formatPrice']),
                         new TwigFilter('lc_liip', [$this, 'lcLiip']),
+                        new TwigFilter('lc_cache', [$this, 'lcCache']),
                 ];
         }
 
+        public function lcCache($file){
+                $cacheTime = filemtime($this->kernel->getProjectDir().'/public'.$file);
+                if($cacheTime){
+                        return $file.'?c='.$cacheTime;
+                }else{
+                        return $file."?c=0";
+                }
+        }
+
+
         public function lcLiip($path, $thumb = 'tile', $default = 'default.jpg')
         {
                 if (substr($path, 0, 1) === '/') $path = substr($path, 1);