Autologin URL with random hash for FOSUserBundle

LoginController.php

<?php

namespace AppBundle\Controller;

use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\EventDispatcher\EventDispatcher;
use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Http\Event\InteractiveLoginEvent;
use Symfony\Component\Security\Core\Exception\AccessDeniedException;

class LoginController extends Controller
{
    /**
     * @Route("/login_hash/{login_hash}", name="login_hash")
     * @param Request $request
     * @param String $login_hash
     * @return Response
     * @throws AccessDeniedException
     */
    public function loginAction(Request $request, $login_hash)
    {
        /** @var \AppBundle\Entity\User $user */
        $user = $this->container->get('security.token_storage')->getToken()->getUser();
        if (is_object($user)) {
            throw new AccessDeniedException();
        }

        if ($login_hash) {
            /** @var \FOS\UserBundle\Doctrine\UserManager $userManager */
            $userManager = $this->get('fos_user.user_manager');
            $user = $userManager->findUserBy(array('loginHash' => $login_hash));
            if ($user) {
                // Here, "main" is the name of the firewall in your security.yml
                $token = new UsernamePasswordToken($user, $user->getPassword(), 'main', $user->getRoles());
                $this->get('security.token_storage')->setToken($token);

                // Fire the login event and logging the user (setToken doesn't do this automatically)
                $event = new InteractiveLoginEvent($request, $token);
                $this->get('event_dispatcher')->dispatch('security.interactive_login', $event);

                // Remove the login hash
                $user->setLoginHash(null);
                $userManager->updateUser($user);

                // Redirect to the home page
                return $this->redirect($this->generateUrl('homepage'));
            }
        }

        throw new AccessDeniedException();
    }
}

services.yml

services:
    sonata.admin.user:
        class: AppBundle\Admin\UserAdmin
        tags:
            - { name: sonata.admin, manager_type: orm, group: "Content", label: "User" }
        arguments:
            - ~
            - AppBundle\Entity\User
            - ~
        calls:
            - [ setTranslationDomain, [AppBundle]]
            - [ setUserManager, ["@fos_user.user_manager"]]

UsedAdmin.php

<?php

namespace AppBundle\Admin;

use Symfony\Component\Security\Core\Role\RoleHierarchy;
use Symfony\Component\Security\Core\Role\Role;
use Sonata\AdminBundle\Admin\Admin;
use Sonata\AdminBundle\Datagrid\ListMapper;
use Sonata\AdminBundle\Datagrid\DatagridMapper;
use Sonata\AdminBundle\Datagrid\ProxyQueryInterface;
use Sonata\AdminBundle\Form\FormMapper;
use Sonata\AdminBundle\Route\RouteCollection;
use FOS\UserBundle\Model\UserManagerInterface;

class UserAdmin extends Admin
{
    protected $userManager;

    public function setUserManager(UserManagerInterface $userManager)
    {
        $this->userManager = $userManager;
    }
    
    /**
     * @return UserManagerInterface
     */
    public function getUserManager()
    {
        return $this->userManager;
    }
    
    ...
    
    public function prePersist($user)
    {
        // Create the first login hash value
        $loginHash = $this->container->get('app.service.random_generator')->randomString(64);
        $user->setLoginHash($loginHash);
        $this->getUserManager()->updateUser($user);
    }
}

User.php

<?php

namespace AppBundle\Entity;

use FOS\UserBundle\Model\User as BaseUser;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;

/**
 * @ORM\Entity
 * @ORM\Table(name="users")
 */
class User extends BaseUser
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;
    
    /**
     * @ORM\Column(type="string", length=64, nullable=true)
     */
    protected $loginHash;
    
    public function __construct()
    {
        parent::__construct();
    }

    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }
    
    /**
     * Set loginHash
     *
     * @param string $loginHash
     * @return User
     */
    public function setLoginHash($loginHash)
    {
        $this->loginHash = $loginHash;

        return $this;
    }

    /**
     * Get loginHash
     *
     * @return string
     */
    public function getLoginHash()
    {
        return $this->loginHash;
    }
}