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<?php |
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namespace Genkgo\Cache\Adapter; |
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use Genkgo\Cache\CacheAdapterInterface; |
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use Genkgo\Cache\SerializerInterface; |
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/** |
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* Class FileAdapter |
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* @package Genkgo\Cache\Adapter |
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*/ |
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class FileAdapter implements CacheAdapterInterface |
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{ |
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/** |
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* @var string |
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*/ |
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private $directory; |
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/** |
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* @var null|int |
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*/ |
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private $chmod; |
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/** |
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* @var null|string |
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*/ |
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private $directorySeparator; |
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/** |
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* @var null|int |
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*/ |
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private $ttl; |
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/** |
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* @var SerializerInterface |
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*/ |
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private $serializer; |
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/** |
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* @param $directory |
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* @param SerializerInterface $serializer |
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* @param null $chmod |
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* @param null $directorySeparator |
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* @param null $ttl |
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*/ |
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public function __construct( |
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$directory, |
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SerializerInterface $serializer, |
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$chmod = null, |
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$directorySeparator = null, |
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$ttl = null |
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) { |
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$this->directory = $directory; |
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$this->chmod = $chmod; |
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$this->directorySeparator = $directorySeparator; |
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$this->ttl = $ttl; |
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$this->serializer = $serializer; |
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} |
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/** |
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* @param $key |
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* @param $value |
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*/ |
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public function set($key, $value) |
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{ |
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$file = $this->getFilename($key); |
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file_put_contents($file, $this->serializer->serialize($value)); |
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if ($this->chmod !== null) { |
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chmod($file, $this->chmod); |
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} |
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} |
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/** |
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* @param $key |
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* @return null|mixed |
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*/ |
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public function get($key) |
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{ |
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$file = $this->getFilename($key); |
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if ($this->exists($file) && $this->valid($file)) { |
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return $this->serializer->deserialize(file_get_contents($file)); |
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} |
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return null; |
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} |
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/** |
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* @param $key |
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*/ |
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public function delete($key) |
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{ |
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if (strpos($key, '*') !== false) { |
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$this->deleteGlob($key); |
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return; |
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} |
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$file = $this->getFilename($key); |
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if ($this->exists($file)) { |
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unlink($file); |
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} |
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} |
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/** |
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* @param $pattern |
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*/ |
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private function deleteGlob($pattern) |
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{ |
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list($directory, $file) = $this->getDirectoryAndFile($pattern); |
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$list = new \GlobIterator($directory . '/' . $file); |
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foreach ($list as $cacheItem) { |
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if ($cacheItem->isDir()) { |
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continue; |
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} |
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unlink($cacheItem->getPathName()); |
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} |
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} |
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/** |
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* @param $file |
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* @return bool |
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*/ |
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private function exists($file) |
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{ |
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return file_exists($file); |
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} |
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/** |
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* @param $file |
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* @return bool |
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*/ |
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private function valid($file) |
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{ |
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return $this->ttl === null || (filemtime($file) + $this->ttl > time()); |
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} |
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/** |
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* @param $key |
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* @return string |
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*/ |
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private function getFilename($key) |
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{ |
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list($directory, $file) = $this->getDirectoryAndFile($key); |
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return $directory . '/' . md5($file); |
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} |
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/** |
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* @param $key |
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* @return array |
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*/ |
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private function getDirectoryAndFile($key) |
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{ |
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$directory = $this->directory; |
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if ($this->directorySeparator !== null) { |
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while (($position = strpos($key, $this->directorySeparator)) !== false) { |
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$dirName = md5(substr($key, 0, $position)); |
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$directory = $directory . '/' . $dirName; |
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$this->createSubDirectoryIfNotExists($directory); |
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$key = substr($key, $position + 1); |
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} |
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} |
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return [$directory, $key]; |
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} |
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/** |
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* @param $directory |
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*/ |
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private function createSubDirectoryIfNotExists($directory) |
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{ |
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if (file_exists($directory) === false) { |
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mkdir($directory); |
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if ($this->chmod !== null) { |
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chmod($directory, $this->chmod); |
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} |
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} |
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} |
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} |
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