Create and register a page sidebar event handler

Modules/Page/Sidebar/SidebarExtender.php → Modules/Page/Events/Handlers/AddPageSidebar.php

 <?php
 
-namespace Modules\Page\Sidebar;
+namespace Modules\Page\Events\Handlers;
 
 use Maatwebsite\Sidebar\Group;
 use Maatwebsite\Sidebar\Item;
 use Maatwebsite\Sidebar\Menu;
+use Modules\Core\Events\BuildingSidebar;
 use Modules\User\Contracts\Authentication;
 
-class SidebarExtender implements \Maatwebsite\Sidebar\SidebarExtender
+class AddPageSidebar implements \Maatwebsite\Sidebar\SidebarExtender
 {
     /**
      * @var Authentication
@@ -24,9 +25,15 @@ class SidebarExtender implements \Maatwebsite\Sidebar\SidebarExtender
         $this->auth = $auth;
     }
 
+    public function handle(BuildingSidebar $sidebar)
+    {
+        $menu = $sidebar->getMenu();
+        $menu1 = $this->extendWith($menu);
+        $sidebar->add($menu1);
+    }
+
     /**
      * @param Menu $menu
-     *
      * @return Menu
      */
     public function extendWith(Menu $menu)

Modules/Page/Providers/PageServiceProvider.php

@@ -4,9 +4,12 @@ namespace Modules\Page\Providers;
 
 use Illuminate\Support\Facades\Config;
 use Illuminate\Support\ServiceProvider;
+use Modules\Core\Events\BuildingSidebar;
 use Modules\Core\Events\CollectingAssets;
+use Modules\Core\Traits\CanGetSidebarClassForModule;
 use Modules\Core\Traits\CanPublishConfiguration;
 use Modules\Page\Entities\Page;
+use Modules\Page\Events\Handlers\AddPageSidebar;
 use Modules\Page\Repositories\Cache\CachePageDecorator;
 use Modules\Page\Repositories\Eloquent\EloquentPageRepository;
 use Modules\Page\Repositories\PageRepository;
@@ -15,7 +18,7 @@ use Modules\Tag\Repositories\TagManager;
 
 class PageServiceProvider extends ServiceProvider
 {
-    use CanPublishConfiguration;
+    use CanPublishConfiguration, CanGetSidebarClassForModule;
     /**
      * Indicates if loading of the provider is deferred.
      *
@@ -31,6 +34,11 @@ class PageServiceProvider extends ServiceProvider
     public function register()
     {
         $this->registerBindings();
+
+        $this->app['events']->listen(
+            BuildingSidebar::class,
+            $this->getSidebarClassForModule('page', AddPageSidebar::class)
+        );
     }
 
     public function boot()