CacheManager.php

<?php

namespace Avalanche\Bundle\ImagineBundle\Imagine;

use Symfony\Component\DependencyInjection\ContainerAware;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

/**
 * Imagine cache manager.
 *
 * @author Саша Стаменковић <[email protected]>
 */
class CacheManager extends ContainerAware
{
    /**
     * Forces image caching and returns path to cached image.
     *
     * @param string $path
     * @param string $filter
     *
     * @return string
     */
    public function cacheImage($path, $filter)
    {
        $sourcePath = $this->container->getParameter('imagine.root_path').$path;
        if (null === $filter) {
            return $sourcePath;
        }

        //TODO: find out why I need double urldecode to get a valid path
        $browserPath = urldecode(urldecode($this->container->get('imagine.cache.path.resolver')->getBrowserPath($path, $filter)));
        $basePath = $this->container->get('request')->getBaseUrl();

        if (!empty($basePath) && 0 === strpos($browserPath, $basePath)) {
             $browserPath = substr($browserPath, strlen($basePath));
        }

         // if cache path cannot be determined, return 404
        if (null === $browserPath) {
            throw new NotFoundHttpException('Image doesn\'t exist');
        }

        $cachedPath = $this->container->getParameter('imagine.root_path').$browserPath;

        // if the file has already been cached, we're probably not rewriting
        // correctly, hence make a 301 to proper location, so browser remembers
        if (file_exists($cachedPath)) {
            return $cachedPath;
        }

        if (!file_exists($sourcePath)) {
            throw new NotFoundHttpException(sprintf(
                'Source image not found in "%s"', $sourcePath
            ));
        }

        $dir = pathinfo($cachedPath, PATHINFO_DIRNAME);

        if (!is_dir($dir)) {
            if (false === $this->container->get('filesystem')->mkdir($dir)) {
                throw new \RuntimeException(sprintf(
                    'Could not create directory %s', $dir
                ));
            }
        }

        // TODO: get rid of hard-coded quality and format
        $this->container->get('imagine.filter.manager')->get($filter)
            ->apply($this->container->get('imagine')->open($sourcePath))
            ->save($cachedPath, array('quality' => $this->container->get('imagine.filter.manager')->getOption($filter, 'quality', 100)))
        ;

        return $cachedPath;
    }
}