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<?php |
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/** |
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* This file is part of the SVN-Buddy library. |
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* For the full copyright and license information, please view |
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* the LICENSE file that was distributed with this source code. |
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* |
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* @copyright Alexander Obuhovich <[email protected]> |
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* @link https://github.com/console-helpers/svn-buddy |
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*/ |
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namespace ConsoleHelpers\SVNBuddy\Cache; |
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use ConsoleHelpers\ConsoleKit\ConsoleIO; |
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use ConsoleHelpers\SVNBuddy\Helper\SizeHelper; |
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class CacheManager |
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{ |
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/** |
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* Working directory. |
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* |
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* @var string |
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*/ |
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private $_workingDirectory; |
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/** |
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* Console IO. |
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* |
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* @var ConsoleIO |
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*/ |
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private $_io; |
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/** |
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* Size helper. |
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* |
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* @var SizeHelper |
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*/ |
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private $_sizeHelper; |
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/** |
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* Create cache manager. |
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* |
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* @param string $working_directory Working directory. |
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* @param SizeHelper $size_helper Size helper. |
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* @param ConsoleIO $io Console IO. |
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*/ |
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public function __construct($working_directory, SizeHelper $size_helper, ConsoleIO $io = null) |
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{ |
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$this->_workingDirectory = $working_directory; |
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$this->_sizeHelper = $size_helper; |
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$this->_io = $io; |
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} |
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/** |
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* Sets value in cache. |
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* |
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* @param string $name Name. |
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* @param mixed $value Value. |
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* @param mixed $invalidator Invalidator. |
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* @param integer $duration Duration in seconds. |
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* |
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* @return void |
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*/ |
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public function setCache($name, $value, $invalidator = null, $duration = null) |
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{ |
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$duration = $this->durationIntoSeconds($duration); |
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$storage = $this->_getStorage($name, $duration); |
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$storage->set(array( |
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'name' => $name, |
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'invalidator' => $invalidator, |
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'duration' => $duration, |
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'expiration' => $duration ? time() + $duration : null, |
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'data' => $value, |
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)); |
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} |
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/** |
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* Gets value from cache. |
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* |
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* @param string $name Name. |
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* @param mixed $invalidator Invalidator. |
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* @param integer $duration Duration in seconds. |
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* |
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* @return mixed |
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*/ |
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public function getCache($name, $invalidator = null, $duration = null) |
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{ |
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$storage = $this->_getStorage($name, $this->durationIntoSeconds($duration)); |
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$cache = $storage->get(); |
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if ( !is_array($cache) || $cache['invalidator'] !== $invalidator ) { |
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$storage->invalidate(); |
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return null; |
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} |
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if ( $cache['expiration'] && $cache['expiration'] < time() ) { |
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$storage->invalidate(); |
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return null; |
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} |
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return $cache['data']; |
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} |
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/** |
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* Converts duration into seconds. |
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* |
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* @param integer $duration Duration in seconds. |
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* |
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* @return integer|null |
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*/ |
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protected function durationIntoSeconds($duration = null) |
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{ |
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if ( !isset($duration) ) { |
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return null; |
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} |
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if ( is_numeric($duration) ) { |
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$duration .= ' seconds'; |
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} |
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$now = time(); |
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return strtotime('+' . $duration, $now) - $now; |
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} |
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/** |
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* Returns file-based cache storage. |
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* |
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* @param string $name Cache name. |
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* @param integer $duration Duration in seconds. |
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* |
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* @return ICacheStorage |
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* @throws \InvalidArgumentException When namespace is missing in the name. |
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*/ |
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private function _getStorage($name, $duration = null) |
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{ |
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$name_parts = explode(':', $name, 2); |
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if ( count($name_parts) != 2 ) { |
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throw new \InvalidArgumentException('The $name parameter must be in "namespace:name" format.'); |
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} |
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$filename_parts = array( |
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$name_parts[0], |
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substr(hash_hmac('sha1', $name_parts[1], 'svn-buddy'), 0, 8), |
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'D' . (isset($duration) ? $duration : 'INF'), |
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); |
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$cache_filename = $this->_workingDirectory . DIRECTORY_SEPARATOR . implode('_', $filename_parts) . '.cache'; |
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if ( isset($this->_io) && $this->_io->isVerbose() ) { |
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$message = $cache_filename; |
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if ( file_exists($cache_filename) ) { |
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$message .= ' (hit: ' . $this->_sizeHelper->formatSize(filesize($cache_filename)) . ')'; |
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} |
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else { |
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$message .= ' (miss)'; |
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} |
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$this->_io->writeln(array( |
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'', |
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'<debug>[cache]: ' . $message . '</debug>', |
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)); |
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} |
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return new FileCacheStorage($cache_filename); |
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} |
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} |
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console-helpers /
svn-buddy
