Event driven menus

layout.html.twig

                    <div class="nav-collapse">
                        {{ knp_menu_render('navigation', {
                            'ancestorClass': 'active',
                            'currentClass': 'active'
                        }) }}

                        <form class="pull-right navbar-search action="{# todo search url #}">
                            <input id="quick-search" type="text" class="search-query span2" placeholder="Search" />
                        </form>

                        {{ knp_menu_render('right_navigation', {
                            'ancestorClass': 'active',
                            'currentClass': 'active'
                        }) }}
                    </div>

Menu.php

<?php

/*
 * TODO: Copyright notices on Infinite Networks files.
 *
 * (c) Infinite Networks Pty Ltd <http://www.infinite.net.au/>
 */

namespace Infinite\MenuBundle\Menu;

use Infinite\MenuBundle\Event\ConfigureMenuEvent;
use Infinite\MenuBundle\Events;
use Knp\Menu\FactoryInterface;
use Knp\Menu\ItemInterface;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\HttpFoundation\Request;

class Menu
{
    private $dispatcher;
    private $factory;

    public function __construct(EventDispatcherInterface $dispatcher, FactoryInterface $factory)
    {
        $this->dispatcher = $dispatcher;
        $this->factory = $factory;
    }

    public function navigation(Request $request)
    {
        $menu = $this->factory->createItem('root');
        $menu->setCurrentUri($request->getRequestUri());
        $menu->setChildrenAttribute('class', 'nav');

        $event = new ConfigureMenuEvent($this->factory, $menu);
        $this->dispatcher->dispatch(Events::CONFIGURE, $event);

        return $event->getMenu();
    }

    public function rightNavigation(Request $request)
    {
        $menu = $this->factory->createItem('root');
        $menu->setCurrentUri($request->getRequestUri());
        $menu->setChildrenAttribute('class', 'nav pull-right');

        $event = new ConfigureMenuEvent($this->factory, $menu);
        $this->dispatcher->dispatch(Events::CONFIGURE_RIGHT, $event);

        return $event->getMenu();
    }
}

MenuListener.php

<?php

namespace Ibms\CustomerBundle\EventListener;

use Infinite\MenuBundle\Event\ConfigureMenuEvent;
use Infinite\MenuBundle\Events;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

class MenuListener implements EventSubscriberInterface
{
    public function configureMenu(ConfigureMenuEvent $event)
    {
        $menu = $event->getMenu();

        $customers = $menu->addChild('Customers', array(
            'uri' => '#',
            'attributes' => array(
                'class' => 'dropdown'
            ),
            'linkAttributes' => array(
                'class' => 'dropdown-toggle',
                'data-toggle' => 'dropdown',
            ),
            'childrenAttributes' => array(
                'class' => 'dropdown-menu',
            ),
        ));

        $customers->addChild('Customers', array(
            'route' => 'ibms_customer_home',
        ));
        $customers->addChild('Groups', array(
            'route' => 'ibms_customer_group_home',
        ));
    }

    static function getSubscribedEvents()
    {
        return array(
            Events::CONFIGURE => array('configureMenu', 512),
        );
    }
}

services.xml

<?xml version="1.0" ?>

<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">

    <services>
        <service id="infinite_menu.builder" class="Infinite\MenuBundle\Menu\Menu">
            <argument type="service" id="event_dispatcher" />
            <argument type="service" id="knp_menu.factory" />
        </service>

        <service id="infinite_menu.menu.navigation" class="Knp\Menu\MenuItem" factory-service="infinite_menu.builder" factory-method="navigation" scope="request">
            <argument type="service" id="request" />

            <tag name="knp_menu.menu" alias="navigation" />
        </service>

        <service id="infinite_menu.menu.right_navigation" class="Knp\Menu\MenuItem" factory-service="infinite_menu.builder" factory-method="rightNavigation" scope="request">
            <argument type="service" id="request" />

            <tag name="knp_menu.menu" alias="right_navigation" />
        </service>

    </services>
</container>