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<?php |
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namespace Chadicus\Marvel\Api\Cache; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Zend\Diactoros\Response; |
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use Zend\Diactoros\Stream; |
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use MongoDB\BSON\UTCDateTime; |
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use MongoDB\Collection; |
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use MongoDB\Model\BSONArray; |
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/** |
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* Concrete implementation of Cache using an array. |
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*/ |
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final class MongoCache extends AbstractCache implements CacheInterface |
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{ |
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/** |
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* MongoDB collection containing the cached responses. |
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* |
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* @var Collection |
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*/ |
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private $collection; |
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/** |
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* Construct a new instance of MongoCache. |
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* |
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* @param Collection $collection The collection containing the cached data. |
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* @param integer $defaultTimeToLive The default time to live in seconds. |
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*/ |
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public function __construct(Collection $collection, int $defaultTimeToLive = CacheInterface::MAX_TTL) |
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{ |
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$this->setDefaultTTL($defaultTimeToLive); |
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$this->collection = $collection; |
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$this->collection->createIndex(['expires' => 1], ['expireAfterSeconds' => 0, 'background' => true]); |
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} |
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/** |
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* Store the api $response as the cached result of the api $request. |
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* |
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* @param RequestInterface $request The request for which the response will be cached. |
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* @param ResponseInterface $response The reponse to cache. |
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* @param integer $timeToLive The time in seconds that the cache should live. |
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* |
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* @return void |
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* |
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* @throws \InvalidArgumentException Throw if $timeToLive is not an integer between 0 and 86400. |
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*/ |
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public function set(RequestInterface $request, ResponseInterface $response, int $timeToLive = null) |
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{ |
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$timeToLive = self::ensureTTL($timeToLive ?: $this->getDefaultTTL()); |
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$id = (string)$request->getUri(); |
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$cache = [ |
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'httpCode' => $response->getStatusCode(), |
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'body' => (string)$response->getBody(), |
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'headers' => $response->getHeaders(), |
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'expires' => new UTCDateTime(time() + $timeToLive), |
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]; |
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$this->collection->updateOne(['_id' => $id], ['$set' => $cache], ['upsert' => true]); |
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} |
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/** |
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* Retrieve the cached results of the api $request. |
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* |
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* @param RequestInterface $request A request for which the response may be cached. |
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* |
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* @return ResponseInterface|null |
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*/ |
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public function get(RequestInterface $request) |
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{ |
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$cached = $this->collection->findOne(['_id' => (string)$request->getUri()]); |
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if ($cached === null) { |
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return null; |
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} |
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$headers = $cached['headers']; |
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if ($headers instanceof BSONArray) { |
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$headers = $headers->getArrayCopy(); |
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} |
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$body = $cached['body']; |
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$stream = fopen('php://temp', 'r+'); |
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fwrite($stream, $body); |
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rewind($stream); |
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return new Response(new Stream($stream), $cached['httpCode'], $headers); |
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} |
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} |
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chadicus /
marvel-api-client
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