Chris@17: <?php
Chris@17: 
Chris@17: namespace Drupal\media\OEmbed;
Chris@17: 
Chris@17: use Drupal\Component\Datetime\TimeInterface;
Chris@17: use Drupal\Component\Serialization\Json;
Chris@17: use Drupal\Core\Cache\CacheBackendInterface;
Chris@17: use Drupal\Core\Cache\UseCacheBackendTrait;
Chris@17: use Drupal\Core\Config\ConfigFactoryInterface;
Chris@17: use GuzzleHttp\ClientInterface;
Chris@17: use GuzzleHttp\Exception\RequestException;
Chris@17: 
Chris@17: /**
Chris@17:  * Retrieves and caches information about oEmbed providers.
Chris@17:  */
Chris@17: class ProviderRepository implements ProviderRepositoryInterface {
Chris@17: 
Chris@17:   use UseCacheBackendTrait;
Chris@17: 
Chris@17:   /**
Chris@17:    * How long the provider data should be cached, in seconds.
Chris@17:    *
Chris@17:    * @var int
Chris@17:    */
Chris@17:   protected $maxAge;
Chris@17: 
Chris@17:   /**
Chris@17:    * The HTTP client.
Chris@17:    *
Chris@17:    * @var \GuzzleHttp\Client
Chris@17:    */
Chris@17:   protected $httpClient;
Chris@17: 
Chris@17:   /**
Chris@17:    * URL of a JSON document which contains a database of oEmbed providers.
Chris@17:    *
Chris@17:    * @var string
Chris@17:    */
Chris@17:   protected $providersUrl;
Chris@17: 
Chris@17:   /**
Chris@17:    * The time service.
Chris@17:    *
Chris@17:    * @var \Drupal\Component\Datetime\TimeInterface
Chris@17:    */
Chris@17:   protected $time;
Chris@17: 
Chris@17:   /**
Chris@17:    * Constructs a ProviderRepository instance.
Chris@17:    *
Chris@17:    * @param \GuzzleHttp\ClientInterface $http_client
Chris@17:    *   The HTTP client.
Chris@17:    * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
Chris@17:    *   The config factory service.
Chris@17:    * @param \Drupal\Component\Datetime\TimeInterface $time
Chris@17:    *   The time service.
Chris@17:    * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
Chris@17:    *   (optional) The cache backend.
Chris@17:    * @param int $max_age
Chris@17:    *   (optional) How long the cache data should be kept. Defaults to a week.
Chris@17:    */
Chris@17:   public function __construct(ClientInterface $http_client, ConfigFactoryInterface $config_factory, TimeInterface $time, CacheBackendInterface $cache_backend = NULL, $max_age = 604800) {
Chris@17:     $this->httpClient = $http_client;
Chris@17:     $this->providersUrl = $config_factory->get('media.settings')->get('oembed_providers_url');
Chris@17:     $this->time = $time;
Chris@17:     $this->cacheBackend = $cache_backend;
Chris@17:     $this->maxAge = (int) $max_age;
Chris@17:   }
Chris@17: 
Chris@17:   /**
Chris@17:    * {@inheritdoc}
Chris@17:    */
Chris@17:   public function getAll() {
Chris@17:     $cache_id = 'media:oembed_providers';
Chris@17: 
Chris@17:     $cached = $this->cacheGet($cache_id);
Chris@17:     if ($cached) {
Chris@17:       return $cached->data;
Chris@17:     }
Chris@17: 
Chris@17:     try {
Chris@17:       $response = $this->httpClient->request('GET', $this->providersUrl);
Chris@17:     }
Chris@17:     catch (RequestException $e) {
Chris@17:       throw new ProviderException("Could not retrieve the oEmbed provider database from $this->providersUrl", NULL, $e);
Chris@17:     }
Chris@17: 
Chris@17:     $providers = Json::decode((string) $response->getBody());
Chris@17: 
Chris@17:     if (!is_array($providers) || empty($providers)) {
Chris@17:       throw new ProviderException('Remote oEmbed providers database returned invalid or empty list.');
Chris@17:     }
Chris@17: 
Chris@17:     $keyed_providers = [];
Chris@17:     foreach ($providers as $provider) {
Chris@17:       try {
Chris@17:         $name = (string) $provider['provider_name'];
Chris@17:         $keyed_providers[$name] = new Provider($provider['provider_name'], $provider['provider_url'], $provider['endpoints']);
Chris@17:       }
Chris@17:       catch (ProviderException $e) {
Chris@17:         // Just skip all the invalid providers.
Chris@17:         // @todo Log the exception message to help with debugging.
Chris@17:       }
Chris@17:     }
Chris@17: 
Chris@17:     $this->cacheSet($cache_id, $keyed_providers, $this->time->getCurrentTime() + $this->maxAge);
Chris@17:     return $keyed_providers;
Chris@17:   }
Chris@17: 
Chris@17:   /**
Chris@17:    * {@inheritdoc}
Chris@17:    */
Chris@17:   public function get($provider_name) {
Chris@17:     $providers = $this->getAll();
Chris@17: 
Chris@17:     if (!isset($providers[$provider_name])) {
Chris@17:       throw new \InvalidArgumentException("Unknown provider '$provider_name'");
Chris@17:     }
Chris@17:     return $providers[$provider_name];
Chris@17:   }
Chris@17: 
Chris@17: }