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| <?php | |
| /* | |
| * This file is part of the Shieldon Simple Cache package. | |
| * | |
| * (c) Terry L. <contact@terryl.in> | |
| * | |
| * For the full copyright and license information, please view the LICENSE | |
| * file that was distributed with this source code. | |
| */ | |
| declare(strict_types=1); | |
| namespace Shieldon\SimpleCache\Driver; | |
| use Shieldon\SimpleCache\CacheProvider; | |
| use Shieldon\SimpleCache\Exception\CacheException; | |
| use DirectoryIterator; | |
| use function chmod; | |
| use function file_exists; | |
| use function file_get_contents; | |
| use function file_put_contents; | |
| use function is_file; | |
| use function rtrim; | |
| use function serialize; | |
| use function unlink; | |
| use function unserialize; | |
| /** | |
| * A cache driver class provided by local file system. | |
| */ | |
| class File extends CacheProvider | |
| { | |
| /** | |
| * The absolute path of the storage's directory. | |
| * It must be writable. | |
| * | |
| * @var string | |
| */ | |
| protected $storage = '/tmp/simple-cache'; | |
| /** | |
| * Constructor. | |
| * | |
| * @param array $setting The settings. | |
| * | |
| * @throws CacheException | |
| */ | |
| public function __construct(array $setting = []) | |
| { | |
| if (isset($setting['storage'])) { | |
| $this->storage = rtrim($setting['storage'], '/'); | |
| } | |
| $this->assertDirectoryWritable($this->storage); | |
| } | |
| /** | |
| * Fetch a cache by an extended Cache Driver. | |
| * | |
| * @param string $key The key of a cache. | |
| * | |
| * @return array | |
| */ | |
| protected function doGet(string $key): array | |
| { | |
| $filePath = $this->getFilePath($key); | |
| if (!is_file($filePath)) { | |
| return []; | |
| } | |
| $data = unserialize(file_get_contents($filePath)); | |
| return $data; | |
| } | |
| /** | |
| * Set a cache by an extended Cache Driver. | |
| * | |
| * @param string $key The key of a cache. | |
| * @param mixed $value The value of a cache. (serialized) | |
| * @param int $ttl The time to live for a cache. | |
| * @param int $timestamp The time to store a cache. | |
| * | |
| * @return bool | |
| */ | |
| protected function doSet(string $key, $value, int $ttl, int $timestamp): bool | |
| { | |
| $contents = [ | |
| 'timestamp' => $timestamp, | |
| 'ttl' => $ttl, | |
| 'value' => $value | |
| ]; | |
| $filePath = $this->getFilePath($key); | |
| if (file_put_contents($filePath, serialize($contents))) { | |
| chmod($filePath, 0640); | |
| return true; | |
| } | |
| return false; | |
| } | |
| /** | |
| * Delete a cache by an extended Cache Driver. | |
| * | |
| * @param string $key The key of a cache. | |
| * | |
| * @return bool | |
| */ | |
| protected function doDelete(string $key): bool | |
| { | |
| $filePath = $this->getFilePath($key); | |
| return is_file($filePath) ? unlink($filePath) : false; | |
| } | |
| /** | |
| * Delete all caches by an extended Cache Driver. | |
| * | |
| * @return bool | |
| */ | |
| protected function doClear(): bool | |
| { | |
| $directory = new DirectoryIterator($this->storage); | |
| foreach ($directory as $file) { | |
| if ($file->isFile() && $file->getExtension() === 'cache') { | |
| unlink($file->getRealPath()); | |
| } | |
| } | |
| return true; | |
| } | |
| /** | |
| * Check if the cache exists or not. | |
| * | |
| * @param string $key The key of a cache. | |
| * | |
| * @return bool | |
| */ | |
| protected function doHas(string $key): bool | |
| { | |
| return file_exists($this->getFilePath($key)); | |
| } | |
| /** | |
| * Get the path of a cache file. | |
| * | |
| * @param string $key The key of a cache. | |
| * | |
| * @return string | |
| */ | |
| private function getFilePath(string $key): string | |
| { | |
| return $this->storage . '/' . $key . '.cache'; | |
| } | |
| } |