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<?php |
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namespace Shetabit\Multipay\Drivers\Jibit; |
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/** |
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* Simple Cache class |
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* API Documentation: https://github.com/cosenary/Simple-PHP-Cache |
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* |
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* @author Christian Metz |
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* @since 22.12.2011 |
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* @copyright Christian Metz - MetzWeb Networks |
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* @version 1.6 |
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* @license BSD http://www.opensource.org/licenses/bsd-license.php |
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*/ |
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class JibitCache |
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{ |
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/** |
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* The path to the cache file folder |
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* |
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* @var string |
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*/ |
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private $_cachepath = 'cache/'; |
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/** |
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* The name of the default cache file |
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* |
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* @var string |
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*/ |
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private $_cachename = 'default'; |
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/** |
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* The cache file extension |
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* |
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* @var string |
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*/ |
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private $_extension = '.cache'; |
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/** |
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* Default constructor |
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* |
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* @param string|array [optional] $config |
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* @return void |
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*/ |
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public function __construct($config = null) |
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{ |
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if (true === isset($config)) { |
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if (is_string($config)) { |
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$this->setCache($config); |
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} else if (is_array($config)) { |
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$this->setCache($config['name']); |
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$this->setCachePath($config['path']); |
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$this->setExtension($config['extension']); |
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} |
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} |
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} |
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/** |
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* Cache name Setter |
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* |
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* @param string $name |
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* @return object |
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*/ |
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public function setCache($name) |
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{ |
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$this->_cachename = $name; |
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return $this; |
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} |
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/** |
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* Check whether data accociated with a key |
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* |
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* @param string $key |
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* @return boolean |
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*/ |
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public function isCached($key) |
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{ |
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if (false != $this->_loadCache()) { |
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$cachedData = $this->_loadCache(); |
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return isset($cachedData[$key]['data']); |
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} |
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} |
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/** |
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* Load appointed cache |
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* |
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* @return mixed |
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*/ |
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private function _loadCache() |
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{ |
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if (true === file_exists($this->getCacheDir())) { |
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$file = file_get_contents($this->getCacheDir()); |
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return json_decode($file, true); |
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} else { |
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return false; |
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} |
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} |
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/** |
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* Get the cache directory path |
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* |
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* @return string |
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*/ |
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public function getCacheDir() |
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{ |
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if (true === $this->_checkCacheDir()) { |
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$filename = $this->getCache(); |
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$filename = preg_replace('/[^0-9a-z\.\_\-]/i', '', strtolower($filename)); |
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return $this->getCachePath() . $this->_getHash($filename) . $this->getExtension(); |
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} |
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} |
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/** |
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* Check if a writable cache directory exists and if not create a new one |
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* |
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* @return boolean |
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*/ |
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private function _checkCacheDir() |
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{ |
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if (!is_dir($this->getCachePath()) && !mkdir($this->getCachePath(), 0775, true)) { |
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throw new \Exception('Unable to create cache directory ' . $this->getCachePath()); |
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} elseif (!is_readable($this->getCachePath()) || !is_writable($this->getCachePath())) { |
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if (!chmod($this->getCachePath(), 0775)) { |
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throw new \Exception($this->getCachePath() . ' must be readable and writeable'); |
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} |
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} |
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return true; |
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} |
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/** |
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* Cache path Getter |
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* |
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* @return string |
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*/ |
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public function getCachePath() |
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{ |
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return $this->_cachepath; |
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} |
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/** |
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* Cache path Setter |
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* |
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* @param string $path |
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* @return object |
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*/ |
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public function setCachePath($path) |
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{ |
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$this->_cachepath = $path; |
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return $this; |
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} |
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/** |
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* Cache name Getter |
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* |
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* @return void |
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*/ |
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public function getCache() |
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{ |
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return $this->_cachename; |
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} |
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/** |
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* Get the filename hash |
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* |
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* @return string |
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*/ |
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private function _getHash($filename) |
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{ |
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return sha1($filename); |
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} |
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/** |
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* Cache file extension Getter |
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* |
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* @return string |
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*/ |
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public function getExtension() |
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{ |
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return $this->_extension; |
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} |
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/** |
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* Cache file extension Setter |
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* |
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* @param string $ext |
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* @return object |
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*/ |
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public function setExtension($ext) |
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{ |
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$this->_extension = $ext; |
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return $this; |
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} |
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/** |
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* Store data in the cache |
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* |
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* @param string $key |
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* @param mixed $data |
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* @param integer [optional] $expiration |
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* @return object |
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*/ |
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public function store($key, $data, $expiration = 0) |
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{ |
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$storeData = array( |
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'time' => time(), |
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'expire' => $expiration, |
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'data' => serialize($data) |
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); |
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$dataArray = $this->_loadCache(); |
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if (true === is_array($dataArray)) { |
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$dataArray[$key] = $storeData; |
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} else { |
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$dataArray = array($key => $storeData); |
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} |
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$cacheData = json_encode($dataArray); |
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file_put_contents($this->getCacheDir(), $cacheData); |
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return $this; |
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} |
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/** |
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* Retrieve cached data by its key |
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* |
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* @param string $key |
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* @param boolean [optional] $timestamp |
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* @return string |
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*/ |
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public function retrieve($key, $timestamp = false) |
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{ |
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$cachedData = $this->_loadCache(); |
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(false === $timestamp) ? $type = 'data' : $type = 'time'; |
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if (!isset($cachedData[$key][$type])) return null; |
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return unserialize($cachedData[$key][$type]); |
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} |
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/** |
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* Retrieve all cached data |
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* |
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* @param boolean [optional] $meta |
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* @return array |
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*/ |
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public function retrieveAll($meta = false) |
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{ |
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if ($meta === false) { |
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$results = array(); |
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$cachedData = $this->_loadCache(); |
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if ($cachedData) { |
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foreach ($cachedData as $k => $v) { |
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$results[$k] = unserialize($v['data']); |
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} |
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} |
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return $results; |
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} else { |
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return $this->_loadCache(); |
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} |
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} |
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/** |
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* Erase cached entry by its key |
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* |
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* @param string $key |
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* @return object |
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*/ |
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public function erase($key) |
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{ |
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$cacheData = $this->_loadCache(); |
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if (true === is_array($cacheData)) { |
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if (true === isset($cacheData[$key])) { |
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unset($cacheData[$key]); |
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$cacheData = json_encode($cacheData); |
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file_put_contents($this->getCacheDir(), $cacheData); |
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} else { |
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throw new \Exception("Error: erase() - Key '{$key}' not found."); |
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} |
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} |
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return $this; |
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} |
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/** |
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* Erase all expired entries |
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* |
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* @return integer |
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*/ |
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public function eraseExpired() |
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{ |
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$cacheData = $this->_loadCache(); |
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if (true === is_array($cacheData)) { |
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$counter = 0; |
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foreach ($cacheData as $key => $entry) { |
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if (true === $this->_checkExpired($entry['time'], $entry['expire'])) { |
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unset($cacheData[$key]); |
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$counter++; |
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} |
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} |
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if ($counter > 0) { |
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$cacheData = json_encode($cacheData); |
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file_put_contents($this->getCacheDir(), $cacheData); |
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} |
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return $counter; |
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} |
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} |
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/** |
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* Check whether a timestamp is still in the duration |
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* |
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* @param integer $timestamp |
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* @param integer $expiration |
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* @return boolean |
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*/ |
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private function _checkExpired($timestamp, $expiration) |
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{ |
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$result = false; |
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if ($expiration !== 0) { |
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$timeDiff = time() - $timestamp; |
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($timeDiff > $expiration) ? $result = true : $result = false; |
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} |
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return $result; |
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} |
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/** |
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* Erase all cached entries |
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* |
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* @return object |
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*/ |
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public function eraseAll() |
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{ |
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$cacheDir = $this->getCacheDir(); |
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if (true === file_exists($cacheDir)) { |
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$cacheFile = fopen($cacheDir, 'w'); |
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fclose($cacheFile); |
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} |
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return $this; |
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} |
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} |
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