core/lib/Drupal/Core/EventSubscriber/DrunkControllerSubscriber.php

   1 <?php
   2
   3 /**
   4  * @file
   5  * Definition of Drupal\Core\EventSubscriber\DrunkControllerSubscriber.
   6  */
   7
   8 namespace Drupal\Core\EventSubscriber;
   9
  10 use Symfony\Component\HttpKernel\KernelEvents;
  11 use Symfony\Component\HttpKernel\Event\FilterControllerEvent;
  12 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  13
  14 use Drupal\Core\Config\Entity\Display;
  15
  16 /**
  17  * Controller injector for text/html responses.
  18  */
  19 class DrunkControllerSubscriber implements EventSubscriberInterface {
  20
  21   /**
  22    * Attaches a controller for blocks-driven HTML rendering, if appropriate.
  23    *
  24    * This determines if the Request and Route are appropriate candidates for
  25    * passing through block-driven rendering, and if so, attaches a controller
  26    * to do so.
  27    *
  28    * This is more or less the default case; we only don't take over if Drupal
  29    * is doing things like form processing, returning JSON or other things that
  30    * (generally) do not involve composing HTML.
  31    *
  32    */
  33   public function onDrunkenKernelController(FilterControllerEvent $event) {
  34     $request = $event->getRequest();
  35     // @todo implement a separate flag and remove this hardmapping
  36     if ('\Drupal\Core\Booze\DrunkController::respond' !== $request->attributes->get('_controller')) {
  37       return;
  38     }
  39
  40     $route = $request->attributes->get('_route');
  41
  42     if (!empty($route)) {
  43       $display = entity_load('booze_display', $route);
  44     }
  45
  46     if (empty($display)) {
  47       // @todo put a real, meaningful exception here. and/or figure out fallback behavior.
  48       // throw new \Exception('no display');
  49       // $display = new Display(array('id' => 'new'));
  50       return;
  51     }
  52
  53     $display->setMainContent($request->attributes->get('_content'));
  54
  55     $request->attributes->set('_display', $display);
  56   }
  57
  58   /**
  59    * Registers the methods in this class that should be listeners.
  60    *
  61    * @return array
  62    *   An array of event listener definitions.
  63    */
  64   public static function getSubscribedEvents() {
  65     $events[KernelEvents::CONTROLLER][] = array('onDrunkenKernelController', 100);
  66
  67     return $events;
  68   }
  69 }