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<?php |
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/** |
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* AnimeDb package. |
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* |
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* @author Peter Gribanov <[email protected]> |
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* @copyright Copyright (c) 2014, Peter Gribanov |
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* @license http://opensource.org/licenses/MIT |
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*/ |
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namespace AnimeDb\Bundle\CacheTimeKeeperBundle\Service; |
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use AnimeDb\Bundle\CacheTimeKeeperBundle\Exception\NotModifiedException; |
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use AnimeDb\Bundle\CacheTimeKeeperBundle\Service\Driver\DriverInterface; |
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use Symfony\Component\HttpFoundation\Request; |
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use Symfony\Component\HttpFoundation\Response; |
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class Keeper |
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{ |
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/** |
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* Key for last update of the project. |
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* |
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* @var string |
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*/ |
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const LAST_UPDATE_KEY = 'last-update'; |
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/** |
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* @var string |
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*/ |
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const IDENTIFIER_SEPARATOR = CacheKeyBuilder::IDENTIFIER_SEPARATOR; |
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/** |
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* @var string |
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*/ |
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const IDENTIFIER_PREFIX = CacheKeyBuilder::IDENTIFIER_PREFIX; |
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/** |
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* @var DriverInterface |
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*/ |
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protected $driver; |
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/** |
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* @var ResponseConfigurator |
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*/ |
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protected $configurator; |
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/** |
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* @var bool |
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*/ |
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protected $enable = true; |
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/** |
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* @param DriverInterface $driver |
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* @param ResponseConfigurator $configurator |
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* @param bool $enable |
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*/ |
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public function __construct(DriverInterface $driver, ResponseConfigurator $configurator, $enable) |
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{ |
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$this->driver = $driver; |
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$this->configurator = $configurator; |
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$this->enable = $enable; |
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} |
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/** |
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* Get time for key. |
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* |
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* @param string $key |
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* |
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* @return \DateTime |
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*/ |
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public function get($key) |
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{ |
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if (!($time = $this->driver->get($key))) { |
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if ($key == self::LAST_UPDATE_KEY) { |
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$time = $this->reset(); |
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} else { |
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$time = $this->get(self::LAST_UPDATE_KEY); |
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} |
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} |
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return $time; |
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} |
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/** |
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* Set time for key. |
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* |
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* @param string $key |
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* @param \DateTime $time |
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* |
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* @return bool |
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*/ |
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public function set($key, \DateTime $time) |
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{ |
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return $this->driver->set($key, $time); |
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} |
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/** |
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* Remove time for key. |
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* |
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* @param string $key |
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* |
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* @return bool |
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*/ |
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public function remove($key) |
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{ |
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return $this->driver->remove($key); |
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} |
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/** |
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* Get a list of keys or dates and chooses the max date. |
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* |
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* @param mixed $params |
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* |
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* @return \DateTime |
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*/ |
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public function getMax($params = []) |
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{ |
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if (!$this->enable) { |
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return new \DateTime(); |
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} |
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$params = (array) $params; |
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// always check the date of the last update of the project |
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if (!in_array(self::LAST_UPDATE_KEY, $params)) { |
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$params[] = self::LAST_UPDATE_KEY; |
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} |
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if (!($time = $this->driver->getMax($params))) { |
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$time = $this->reset(); |
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} |
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return $time; |
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} |
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/** |
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* Get cache response. |
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* |
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* Set $lifetime as < 0 for not set max-age |
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* |
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* @param mixed $params |
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* @param int $lifetime |
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* @param Response|null $response |
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* |
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* @return Response |
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*/ |
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public function getResponse($params = [], $lifetime = -1, Response $response = null) |
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{ |
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if (!$response) { |
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$response = new Response(); |
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} |
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if (!$this->enable) { |
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return $response; |
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} |
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return $this->configurator->configure($response, $this->getMax($params), $lifetime); |
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} |
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/** |
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* Get only modified response. |
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* |
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* Throw exception if response was not modified for this request |
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* |
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* Set $lifetime as < 0 for not set max-age |
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* |
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* @throws NotModifiedException |
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* |
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* @param Request $request |
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* @param mixed $params |
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* @param int $lifetime |
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* @param Response|null $response |
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* |
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* @return Response |
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*/ |
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public function getModifiedResponse(Request $request, $params = [], $lifetime = -1, Response $response = null) |
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{ |
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$response = $this->getResponse($params, $lifetime, $response); |
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if ($response->isNotModified($request)) { |
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throw new NotModifiedException($response); |
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} |
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return $response; |
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} |
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/** |
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* Reset last update date. |
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* |
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* @return \DateTime |
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*/ |
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private function reset() |
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{ |
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$time = new \DateTime(); |
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$this->driver->set(self::LAST_UPDATE_KEY, $time); |
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return $time; |
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} |
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} |
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