Create Menu annotation and listener #222

catalyst/menu-bundle/Annotation/Menu.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Catalyst\MenuBundle\Annotation;
+
+use Annotation;
+
+/**
+ * @Annotation
+ */
+class Menu
+{
+    public $selected;
+}

catalyst/menu-bundle/Listener/MenuAnnotationListener.php

@@ -0,0 +1,77 @@
+<?php
+
+namespace Catalyst\MenuBundle\Listener;
+
+use Doctrine\Common\Annotations\Reader;
+use ReflectionClass;
+use ReflectionException;
+use RuntimeException;
+use Symfony\Component\HttpKernel\Event\FilterControllerEvent;
+use Catalyst\MenuBundle\Annotation\Menu as MenuAnnotation;
+use Twig\Environment as TwigEnvironment;
+
+// TODO: put the generator in our bundle
+use App\Menu\Generator as MenuGenerator;
+
+class MenuAnnotationListener
+{
+    protected $annot_reader;
+    protected $menu_gen;
+	protected $twig;
+    protected $menu_name;
+
+    public function __construct(Reader $annot_reader, MenuGenerator $menu_gen, TwigEnvironment $twig, $menu_name)
+    {
+        $this->annot_reader = $annot_reader;
+        $this->menu_gen = $menu_gen;
+	    $this->twig = $twig;
+        $this->menu_name = $menu_name;
+    }
+
+    public function onKernelController(FilterControllerEvent $event)
+    {
+        if (!$event->isMasterRequest())
+            return;
+
+        // get controller
+        $event_controller = $event->getController();
+        if (!is_array($event_controller))
+            return;
+
+        list($controller, $method_name) = $event_controller;
+
+        // get reflection class
+        try
+        {
+            $ref_controller = new ReflectionClass($controller);
+        }
+        catch (ReflectionException $e)
+        {
+            throw new RuntimeException('Cannot read menu annotation.');
+        }
+
+        // get method annotations
+        $ref_method = $ref_controller->getMethod($method_name);
+        $annotation = $this->annot_reader->getMethodAnnotation($ref_method, MenuAnnotation::class);
+        
+        // check if we get anything
+        if ($annotation == null)
+            return;
+
+        $this->selectMenu($annotation->selected);
+    }
+
+    protected function selectMenu($selected)
+    {
+        // get menu
+        $menu = $this->menu_gen->getMenu($this->menu_name);
+
+        // set menu selected
+        $sel = $menu['index']->get($selected);
+        if ($sel != null)
+            $sel->setSelected();
+
+        // create twig global variable
+        $this->twig->addGlobal($this->menu_name, $menu);
+    }
+}

config/services.yaml

@@ -119,3 +119,9 @@ services:
             $config_dir: "%kernel.root_dir%/../config"
             $acl_file: "%api_acl_file%"
 
+    Catalyst\MenuBundle\Listener\MenuAnnotationListener:
+        arguments:
+            $menu_name: "main_menu"
+        tags:
+            - { name: kernel.event_listener, event: kernel.controller, method: onKernelController }
+