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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\EventSubscriber\PathRootsSubscriber. | |
| */ | |
| namespace Drupal\Core\EventSubscriber; | |
| use Drupal\Core\State\StateInterface; | |
| use Drupal\Core\Routing\RouteBuildEvent; | |
| use Drupal\Core\Routing\RoutingEvents; | |
| use Symfony\Component\EventDispatcher\EventSubscriberInterface; | |
| /** | |
| * Provides all available first bits of all route paths. | |
| */ | |
| class PathRootsSubscriber implements EventSubscriberInterface { | |
| /** | |
| * Stores the path roots available in the router. | |
| * | |
| * A path root is the first virtual directory of a path, like 'admin', 'node' | |
| * or 'user'. | |
| * | |
| * @var array | |
| */ | |
| protected $pathRoots; | |
| /** | |
| * The state key value store. | |
| * | |
| * @var \Drupal\Core\State\StateInterface | |
| */ | |
| protected $state; | |
| /** | |
| * Constructs a new PathRootsSubscriber instance. | |
| * | |
| * @param \Drupal\Core\State\StateInterface $state | |
| * The state key value store. | |
| */ | |
| public function __construct(StateInterface $state) { | |
| $this->state = $state; | |
| } | |
| /** | |
| * Collects all path roots. | |
| * | |
| * @param \Drupal\Core\Routing\RouteBuildEvent $event | |
| * The route build event. | |
| */ | |
| public function onRouteAlter(RouteBuildEvent $event) { | |
| $collection = $event->getRouteCollection(); | |
| foreach ($collection->all() as $route) { | |
| $bits = explode('/', ltrim($route->getPath(), '/')); | |
| $this->pathRoots[$bits[0]] = $bits[0]; | |
| } | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function onRouteFinished() { | |
| $this->state->set('router.path_roots', array_keys($this->pathRoots)); | |
| unset($this->pathRoots); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public static function getSubscribedEvents() { | |
| $events = array(); | |
| // Try to set a low priority to ensure that all routes are already added. | |
| $events[RoutingEvents::ALTER][] = array('onRouteAlter', -1024); | |
| $events[RoutingEvents::FINISHED][] = array('onRouteFinished'); | |
| return $events; | |
| } | |
| } |