Hide media and members tabs on non-Islandora objects. (#160 An error occurred )

* Use custom access to test type of node

* Also hide Members tab

* Separate permission for node fields

* Check for correct field

* Add phpdoc and make both fields required.

* Remove whitespace

src/Controller/ManageMediaController.php

@@ -2,6 +2,9 @@
 
 namespace Drupal\islandora\Controller;
 
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Routing\RouteMatch;
+use Drupal\node\Entity\Node;
 use Drupal\node\NodeInterface;
 
 /**
@@ -14,6 +17,9 @@ class ManageMediaController extends ManageMembersController {
    *
    * @param \Drupal\node\NodeInterface $node
    *   Node you want to add a media to.
+   *
+   * @return array
+   *   Array of media types to add.
    */
   public function addToNodePage(NodeInterface $node) {
     return $this->generateTypeList(
@@ -26,4 +32,26 @@ class ManageMediaController extends ManageMembersController {
     );
   }
 
+  /**
+   * Check if the object being displayed "is Islandora".
+   *
+   * @param \Drupal\Core\Routing\RouteMatch $route_match
+   *   The current routing match.
+   *
+   * @return \Drupal\Core\Access\AccessResultAllowed|\Drupal\Core\Access\AccessResultForbidden
+   *   Whether we can or can't show the "thing".
+   */
+  public function access(RouteMatch $route_match) {
+    if ($route_match->getParameters()->has('node')) {
+      $node = $route_match->getParameter('node');
+      if (!$node instanceof NodeInterface) {
+        $node = Node::load($node);
+      }
+      if ($node->hasField('field_model') && $node->hasField('field_member_of')) {
+        return AccessResult::allowed();
+      }
+    }
+    return AccessResult::forbidden();
+  }
+
 }

src/EventSubscriber/AdminViewsRouteSubscriber.php

@@ -16,9 +16,13 @@ class AdminViewsRouteSubscriber extends RouteSubscriberBase {
   protected function alterRoutes(RouteCollection $collection) {
     if ($route = $collection->get('view.media_of.page_1')) {
       $route->setOption('_admin_route', 'TRUE');
+      $route->setRequirement('_permission', 'manage media');
+      $route->setRequirement('_custom_access', '\Drupal\islandora\Controller\ManageMediaController::access');
     }
     if ($route = $collection->get('view.manage_members.page_1')) {
       $route->setOption('_admin_route', 'TRUE');
+      $route->setRequirement('_permission', 'manage members');
+      $route->setRequirement('_custom_access', '\Drupal\islandora\Controller\ManageMediaController::access');
     }
   }