Symfony URL Redirection

Some time is very needy to redirect URL base on different conditional behaviour. This example presents how to check locale and redirect to locale

namespace Chorke\Bundle\WebappBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
use Symfony\Component\HttpFoundation\Response;

/**
 * @Template
 * @Route("/home")
 */
class HomeController extends Controller
{
    private $lingos;
    private $locals;
    
    public function __construct()
    {
        $lingos = "ar|bn|en|fr|tk|zz";
        $this->lingos = str_replace("|zz", "", $lingos);
        $this->locals = explode('|', $this->lingos);
    }

    /**
     * @Route("/{_locale}",
     *  name="home_index", defaults={"_locale"="zz"},
     *  requirements={"_locale"="ar|bn|en|fr|tk|zz"})
     */
    public function indexAction($_locale)
    {
        if(!$this->hasLocal($_locale))
        {
            return $this->redirectToLocal('home_index');
        }
        $parameters = array('locale' => $_locale);
        return $parameters;
    }

    private function hasLocal($locale)
    {
        return in_array($locale, $this->locals);
    }

    private function redirectToLocal($route)
    {
        $parameters = array('_locale' => 'en');
        return $this->redirectToRoute($route, $parameters, Response::HTTP_TEMPORARY_REDIRECT);
    }

}