Nested menu with parameters in Symfony and KNPmenu - symfony

Question

I am struggling with Symfony2 and Knpmenu to build a menu that handles:
breadcrumbs
routing with dynamic parameters
rendering of separate menus starting with different children
My Menu/Builder.php file looks like this (the extra bits like navbar, pull-nav etc are part of the mopa_bootstrap extension that handles the rendering using bootstrap classes):
namespace My\AppBundle\Menu;
use Knp\Menu\FactoryInterface;
class Builder
{
public function mainMenu(FactoryInterface $factory, array $options)
{
$menu = $factory->createItem(
'root', array(
'navbar' => true,
'pull-right' => true,
)
);
// Main Menu -> Config
// no link here, it's just a placeholder
$dropdown = $menu->addChild(
'Config', array(
'dropdown' => true,
'caret' => true,
)
);
// Menu -> Config -> User
$dropdown2 = $dropdown ->addChild(
'User', array(
'route' => 'user',
)
);
// Secondary Menu -> Edit (but child of Menu -> Config -> User)
$dropdown2->addChild(
'Edit',
array(
'route' => 'user_edit',
'routeParameters' => array('name' => $options['id']),
)
);
The idea is to have a main menu that prints the first two levels only, and a separate menu that gets rendered somewhere else to allow users moving between the edit/delete/whatever views of that specific element being viewed.
What I am trying to achieve, is to have a single structure thus to handle the parenting structure, not only to have sign parents as active in the menu, but also to be able to handle a working breadcrumb structure.
InResources/views/base.html.twig I am calling the main menu like this:
{{ mopa_bootstrap_menu('MyAppBundle:Builder:mainMenu', {depth: 2}) }}
And ideally the sub menu like this:
{% set id = app.request.attributes.get('id') %}
{% if app.request.attributes.get('_route') starts with 'user_' %}
{% set menu = knp_menu_get('MyAppBundle:Builder:mainMenu', ['User'], {'id': id }) %}
{{ knp_menu_render(menu) }}
{% endif %}
However:
knpmenu returns error when rendering the main menu, as $options['id'] isn't defined
I still can't render the secondary menu (therefore by passing the parameter 'User') - the page just returns a black output in that block
Is this approach correct?
I'm using "knplabs/knp-menu": "2.0.*#dev" and "symfony/symfony": "2.5.*"

Answer 1

As it turns out, using this method allowed to access effectively $request and add the conditional in the MenuBuilder.php file to prompt the sub-sub-items only under certain conditions.
The final code looks like this:
// Menu/MenuBuilder.php
namespace My\AppBundle\Menu;
use Knp\Menu\FactoryInterface;
use Symfony\Component\HttpFoundation\Request;
class MenuBuilder
{
private $factory;
/**
* #param FactoryInterface $factory
*/
public function __construct(FactoryInterface $factory)
{
$this->factory = $factory;
}
public function createMainMenu(Request $request)
{
$menu = $this->factory->createItem(
'root', array(
'navbar' => true,
'pull-right' => true,
)
);
// Main Menu -> Config
// no link here, it's just a placeholder
$dropdown = $menu->addChild(
'Config', array(
'dropdown' => true,
'caret' => true,
)
);
// Menu -> Config -> User
$dropdown2 = $dropdown ->addChild(
'User', array(
'route' => 'user',
)
);
// Secondary Menu -> Edit (but child of Menu -> Config -> User)
// Skip this part if we are not in the relevant page, thus to avoid errors
if (false !== strpos($request->get('_route'), 'user_') && $request->get('id')):
$dropdown2->addChild(
'Edit',
array(
'route' => 'user_edit',
'routeParameters' => array('id' => $request->get('id')),
)
);
endif;
And the services configuration file:
// Resources/config/services.yml
services:
my_app.menu_builder:
class: My\AppBundle\Menu\MenuBuilder
arguments: ["#knp_menu.factory"]
my_app.menu.main:
class: Knp\Menu\MenuItem
factory_service: my_app.menu_builder
factory_method: createMainMenu
arguments: ["#request"]
scope: request
tags:
- { name: knp_menu.menu, alias: main }
And then the Resources/views/base.html.twig template:
// Main menu
{% set menu = knp_menu_get('main', ['Config', 'Users'], {'id': id }) %}
{{ knp_menu_render(menu) }}
// Secondary menu
{% if app.request.attributes.get('_route') starts with 'user_' %}
{% set menu = knp_menu_get('main', ['Config', 'Users'], {'id': id }) %}
{{ mopa_bootstrap_menu(menu, {'automenu': 'navbar'}) }}
{% endif %}
The solution seems to work, but if you have a better approach please do let me know!