LoginFormAuthenticator

LoginFormAuthenticator.php

<?php

namespace AppBundle\Security;

use AppBundle\Form\LoginForm;
use Doctrine\ORM\EntityManager;
use Symfony\Component\Form\FormFactoryInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\Routing\RouterInterface;
use Symfony\Component\Security\Core\Security;
use Symfony\Component\Security\Core\User\UserInterface;
use Symfony\Component\Security\Core\User\UserProviderInterface;
use Symfony\Component\Security\Guard\Authenticator\AbstractFormLoginAuthenticator;

/**
 * This services intercepts login form submission and handles it.
 */
class LoginFormAuthenticator extends AbstractFormLoginAuthenticator
{
    /**
     * @var FormFactoryInterface
     */
    private $form_factory;

    /**
     * @var EntityManager
     */
    private $em;

    /**
     * @var RouterInterface
     */
    private $router;

    /**
     * @var RequestStack
     */
    private $request_stack;

    /**
     * @param FormFactoryInterface $form_factory
     * @param EntityManager $em
     * @param RouterInterface $router
     * @param RequestStack $request_stack
     */
    public function __construct(
        FormFactoryInterface $form_factory,
        EntityManager        $em,
        RouterInterface      $router,
        RequestStack         $request_stack
    )
    {
        $this->form_factory  = $form_factory;
        $this->em            = $em;
        $this->router        = $router;
        $this->request_stack = $request_stack;
    }

    /**
     * This method gets the credentials that have put into the login form.
     *
     * @inheritDoc
     */
    public function getCredentials(Request $request)
    {
        if (!$request->getPathInfo() == '/login' && !$request->isMethod('POST')) {
            return;
        }

        $form = $this->form_factory->create(LoginForm::class);
        $form->handleRequest($request);
        $data = $form->getData();

        return $data;
    }

    /**
     * Symfony calls getUser() and has the value from getCredentials() passed in as value for
     * $credentials.
     *
     * @inheritDoc
     */
    public function getUser($credentials, UserProviderInterface $userProvider)
    {
        $username = $credentials['_username'];
        $request  = $this->request_stack->getCurrentRequest();
        
        $request->getSession()->set(
            Security::LAST_USERNAME,
            $username
        );

        return $this->em->getRepository('AppBundle:User')->findOneBy(['email' => $username]);
    }

    /**
     * Symfony Guard calls checkCredentials() as soon as getUser() returns something
     *
     * @inheritDoc
     */
    public function checkCredentials($credentials, UserInterface $user)
    {
        return 'Welkom01!' == $credentials['_password'];
    }

    /**
     * @inheritDoc
     */
    protected function getLoginUrl()
    {
        return $this->router->generate('security_login');  
    }

    /**
     * {@inheritdoc}
     */
    protected function getDefaultSuccessRedirectUrl()
    {
        return $this->router->generate('homepage');
    }
}