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<?php |
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/** |
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* Phossa Project |
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* |
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* PHP version 5.4 |
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* |
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* @category Library |
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* @package Phossa2\Cache |
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* @copyright Copyright (c) 2016 phossa.com |
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* @license http://mit-license.org/ MIT License |
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* @link http://www.phossa.com/ |
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*/ |
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/*# declare(strict_types=1); */ |
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namespace Phossa2\Cache\Driver; |
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use Phossa2\Storage\Storage; |
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use Psr\Cache\CacheItemInterface; |
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use Phossa2\Cache\Interfaces\CacheItemExtendedInterface; |
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/** |
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* StorageDriver |
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* |
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* Driver using Phossa2\Storage library |
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* |
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* @package Phossa2\Cache |
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* @author Hong Zhang <[email protected]> |
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* @see DriverAbstract |
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* @version 2.0.0 |
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* @since 2.0.0 added |
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*/ |
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class StorageDriver extends DriverAbstract |
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{ |
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/** |
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* Storage backend |
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* |
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* @var Storage |
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* @access protected |
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*/ |
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protected $storage; |
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/** |
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* Cache directory in storage |
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* |
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* @var string |
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* @access protected |
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*/ |
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protected $cache_dir; |
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/** |
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* Inject storage object |
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* |
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* @param Storage $storage |
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* @param string $cacheDir |
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* @param array $properties |
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* @access public |
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*/ |
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public function __construct( |
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Storage $storage, |
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/*# string */ $cacheDir = '/cache', |
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array $properties = [] |
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) { |
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$this->storage = $storage; |
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$this->cache_dir = rtrim($cacheDir, '/'); |
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parent::__construct($properties); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function save(CacheItemInterface $item)/*# : bool */ |
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{ |
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if ($item instanceof CacheItemExtendedInterface) { |
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$key = $item->getKey(); |
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$exp = $item->getExpiration()->getTimestamp(); |
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$res = $this->storage->put( |
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$this->getPath($key), |
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(string) $item, |
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['mtime' => $exp] |
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); |
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return $res ?: $this->resetError(); |
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} |
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return false; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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protected function driverHas(/*# string */ $key)/*# : array */ |
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{ |
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$path = $this->getPath($key); |
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// not found |
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if (!$this->storage->has($path)) { |
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return []; |
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} |
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// translate 'mtime' to 'expire' |
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$meta = $this->storage->meta($path); |
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if (isset($meta['mtime'])) { |
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$meta['expire'] = (int) $meta['mtime']; |
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} |
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return $meta; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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protected function driverGet(/*# string */ $key) |
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{ |
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$res = $this->storage->get($this->getPath($key)); |
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$this->resetError(); |
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return is_string($res) ? $res : null; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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protected function driverDelete(CacheItemInterface $item)/*# : bool */ |
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{ |
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$key = $item->getKey(); |
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$res = $this->storage->del($this->getPath($key)); |
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return $res ?: $this->resetError(); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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protected function driverClear()/*# : bool */ |
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{ |
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$res = $this->storage->del($this->cache_dir); |
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return $res ?: $this->resetError(); |
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} |
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/** |
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* Generate full path in storage base on the given key |
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* |
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* @param string $key |
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* @access protected |
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*/ |
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protected function getPath(/*# string */ $key)/*# : string */ |
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{ |
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return $this->cache_dir . '/' . $key; |
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} |
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/** |
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* Reset to storage error |
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* |
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* @return false |
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* @access protected |
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*/ |
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protected function resetError()/*# : bool */ |
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{ |
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$this->copyError($this->storage); |
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return false; |
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} |
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} |
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phossa2 /
libs
