When language service is not being called make sure to use the route object

Author: robertragas

modules/custom/social_language/src/Access.php

@@ -7,6 +7,7 @@
 use Drupal\Core\Routing\Access\AccessInterface;
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\Core\Session\AccountInterface;
+use Symfony\Component\Routing\Route;
 
 /**
  * Class Access.
@@ -49,12 +50,22 @@ public function __construct(LanguageManagerInterface $language_manager) {
    */
   public function access(RouteMatchInterface $route_match, AccountInterface $account, $permission = NULL) {
     if (count($this->languageManager->getLanguages()) > 1) {
-      if (!empty($permission)) {
-        return AccessResult::allowedIfHasPermission($account, $permission);
+      // If the permission is null the service was not called,
+      // and we should get it from the route object.
+      if (is_null($permission)) {
+        // Get route object.
+        $route = $route_match->getRouteObject();
+        assert($route instanceof Route);
+
+        // Get defined permission on _social_language_access.
+        $permission = $route->getRequirements()['_social_language_access'];
       }
-      else {
-        return AccessResult::allowed();
+
+      if (is_string($permission)) {
+        return AccessResult::allowedIfHasPermission($account, $permission);
       }
+
+      return AccessResult::neutral();
     }
 
     return AccessResult::forbidden();