added plugin screen (#671)

src/Event/ConfigureMainMenuEvent.php

@@ -10,6 +10,7 @@
 namespace App\Event;
 
 use KevinPapst\AdminLTEBundle\Event\SidebarMenuEvent;
+use KevinPapst\AdminLTEBundle\Model\MenuItemModel;
 use Symfony\Component\EventDispatcher\Event;
 use Symfony\Component\HttpFoundation\Request;
 
@@ -28,17 +29,27 @@ class ConfigureMainMenuEvent extends Event
      * @var SidebarMenuEvent
      */
     private $event;
+    /**
+     * @var MenuItemModel
+     */
+    private $admin;
+    /**
+     * @var MenuItemModel
+     */
+    private $system;
 
     /**
      * @param Request $request
      * @param SidebarMenuEvent $event
+     * @param MenuItemModel $admin
+     * @param MenuItemModel $system
      */
-    public function __construct(
-        Request $request,
-        SidebarMenuEvent $event
-    ) {
+    public function __construct(Request $request, SidebarMenuEvent $event, MenuItemModel $admin, MenuItemModel $system)
+    {
         $this->request = $request;
         $this->event = $event;
+        $this->admin = $admin;
+        $this->system = $system;
     }
 
     /**
@@ -56,4 +67,20 @@ class ConfigureMainMenuEvent extends Event
     {
         return $this->event;
     }
+
+    /**
+     * @return MenuItemModel
+     */
+    public function getAdminMenu()
+    {
+        return $this->admin;
+    }
+
+    /**
+     * @return MenuItemModel
+     */
+    public function getSystemMenu()
+    {
+        return $this->system;
+    }
 }

src/Event/ThemeEvent.php

@@ -17,6 +17,10 @@ class ThemeEvent extends Event
     public const JAVASCRIPT = 'app.theme.javascript';
     public const STYLESHEET = 'app.theme.css';
     public const HTML_HEAD = 'app.theme.html_head';
+    public const CONTENT_BEFORE = 'app.theme.content_before';
+    public const CONTENT_START = 'app.theme.content_start';
+    public const CONTENT_END = 'app.theme.content_end';
+    public const CONTENT_AFTER = 'app.theme.content_after';
 
     /**
      * @var User