redirect home page by permission

src/EventSubscriber/OpencaseSubscriber.php

@@ -0,0 +1,59 @@
+<?php
+
+namespace Drupal\opencase\EventSubscriber;
+ 
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpFoundation\RedirectResponse;
+use Symfony\Component\HttpKernel\Event\GetResponseEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
+use Drupal\Core\Url;
+ 
+/**
+ * Class OpencaseSubscriber.
+ *
+ * @package Drupal\opencase\EventSubscriber
+ */
+class OpencaseSubscriber implements EventSubscriberInterface {
+
+    private $alternativeHomePage = '/opencase/actors/client';
+
+  /**
+   * Registers the methods in this class that should be listeners.
+   *
+   * @return array
+   *   An array of event listener definitions.
+   */
+  public static function getSubscribedEvents() {
+    $events[KernelEvents::REQUEST][] = ['onRequest'];
+    return $events;
+  }
+
+  /**
+   * Manipulates the request object.
+   *
+   * @param \Symfony\Component\HttpKernel\Event\GetResponseEvent $event
+   *   The Event to process.
+   */
+  public function onRequest(GetResponseEvent $event): void {
+    if ($this->requestIsForHomePage($event) && $this->currentUserShouldBeDirectedToAlternativeHomePage()){
+        $this->redirectToAlternativeHomePage($event);
+    }
+  }
+
+  private function requestIsForHomePage($event):bool {
+    return $event->getRequest()->getRequestUri() == '/';
+  }
+  
+  private function currentUserShouldBeDirectedToAlternativeHomePage():bool {
+    return $this->currentUserCanSeeAllCases();
+  }
+  private function currentUserCanSeeAllCases():bool {
+    return \Drupal::currentUser()->hasPermission('view all published case entities');
+  }
+
+  private function redirectToAlternativeHomePage(GetResponseEvent $event):void {
+    $redirect_target_url = Url::fromUserInput($this->alternativeHomePage);
+    $response = new RedirectResponse($redirect_target_url->setAbsolute()->toString());
+    $event->setResponse($response);
+  }
+}