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<?php
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namespace Kevinrob\GuzzleCache\Storage;
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use Kevinrob\GuzzleCache\CacheEntry;
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use Psr\SimpleCache\CacheInterface;
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class Psr16CacheStorage implements CacheStorageInterface
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{
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    /**
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     * @var CacheInterface
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     */
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    private $cache;
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    public function __construct(CacheInterface $cache)
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    {
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        $this->cache = $cache;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function fetch($key)
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    {
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        $data = $this->cache->get($key);
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        if ($data instanceof CacheEntry) {
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            return $data;
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        }
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        return null;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function save($key, CacheEntry $data)
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    {
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        $ttl = $data->getTTL();
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        if ($ttl === 0) {
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        return $this->cache->set($key, $data);
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        }
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        return $this->cache->set($key, $data, $data->getTTL());
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function delete($key)
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    {
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        return $this->cache->delete($key);
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    }
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}