Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\Core\EventSubscriber;
Chris@0: 
Chris@0: use Drupal\Core\Database\Connection;
Chris@0: use Drupal\Core\Installer\InstallerRedirectTrait;
Chris@0: use Symfony\Component\EventDispatcher\EventSubscriberInterface;
Chris@0: use Symfony\Component\HttpFoundation\RedirectResponse;
Chris@0: use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
Chris@0: use Symfony\Component\HttpKernel\KernelEvents;
Chris@0: 
Chris@0: /**
Chris@0:  * Exception handler to determine if an exception indicates an uninstalled site.
Chris@0:  */
Chris@0: class ExceptionDetectNeedsInstallSubscriber implements EventSubscriberInterface {
Chris@0:   use InstallerRedirectTrait;
Chris@0: 
Chris@0:   /**
Chris@0:    * The default database connection.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Database\Connection
Chris@0:    */
Chris@0:   protected $connection;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a new ExceptionDetectNeedsInstallSubscriber.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Database\Connection $connection
Chris@0:    *   The default database connection.
Chris@0:    */
Chris@0:   public function __construct(Connection $connection) {
Chris@0:     $this->connection = $connection;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Handles errors for this subscriber.
Chris@0:    *
Chris@0:    * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event
Chris@0:    *   The event to process.
Chris@0:    */
Chris@0:   public function onException(GetResponseForExceptionEvent $event) {
Chris@0:     $exception = $event->getException();
Chris@0:     if ($this->shouldRedirectToInstaller($exception, $this->connection)) {
Chris@0:       // Only redirect if this is an HTML response (i.e., a user trying to view
Chris@0:       // the site in a web browser before installing it).
Chris@0:       $request = $event->getRequest();
Chris@0:       $format = $request->query->get(MainContentViewSubscriber::WRAPPER_FORMAT, $request->getRequestFormat());
Chris@0:       if ($format == 'html') {
Chris@0:         $event->setResponse(new RedirectResponse($request->getBasePath() . '/core/install.php', 302, ['Cache-Control' => 'no-cache']));
Chris@0:       }
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Registers the methods in this class that should be listeners.
Chris@0:    *
Chris@0:    * @return array
Chris@0:    *   An array of event listener definitions.
Chris@0:    */
Chris@0:   public static function getSubscribedEvents() {
Chris@0:     $events[KernelEvents::EXCEPTION][] = ['onException', 100];
Chris@0:     return $events;
Chris@0:   }
Chris@0: 
Chris@0: }