vendor/kriswallsmith/assetic/src/Assetic/Asset/AssetCache.php

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<?php

/*
 * This file is part of the Assetic package, an OpenSky project.
 *
 * (c) 2010-2014 OpenSky Project Inc
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Assetic\Asset;

use Assetic\Cache\CacheInterface;
use Assetic\Filter\FilterInterface;
use Assetic\Filter\HashableInterface;

/**
 * Caches an asset to avoid the cost of loading and dumping.
 *
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 */
class AssetCache implements AssetInterface
{
    private $asset;
    private $cache;

    public function __construct(AssetInterface $asset, CacheInterface $cache)
    {
        $this->asset = $asset;
        $this->cache = $cache;
    }

    public function ensureFilter(FilterInterface $filter)
    {
        $this->asset->ensureFilter($filter);
    }

    public function getFilters()
    {
        return $this->asset->getFilters();
    }

    public function clearFilters()
    {
        $this->asset->clearFilters();
    }

    public function load(FilterInterface $additionalFilter = null)
    {
        $cacheKey = self::getCacheKey($this->asset, $additionalFilter, 'load');
        if ($this->cache->has($cacheKey)) {
            $this->asset->setContent($this->cache->get($cacheKey));

            return;
        }

        $this->asset->load($additionalFilter);
        $this->cache->set($cacheKey, $this->asset->getContent());
    }