LcShopBundle/ShopBundle/Form/DataTransformer/NewsletterSignupToBooleanTransformer.php

<?php

namespace Lc\ShopBundle\Form\DataTransformer;

use Lc\ShopBundle\Context\ProductInterface;
use Doctrine\ORM\EntityManagerInterface;
use Lc\ShopBundle\Services\UtilsManager;
use Symfony\Component\Form\DataTransformerInterface;
use Symfony\Component\Form\Exception\TransformationFailedException;
use Symfony\Component\Security\Core\Security;

class NewsletterSignupToBooleanTransformer implements DataTransformerInterface
{
        private $security ;
        private $userUtils ;

        public function __construct(Security $security, UtilsManager $utilsManager)
        {
                $this->security = $security;
                $this->userUtils = $utilsManager->getUserUtils() ;
        }

        public function transform($newsletter)
        {
                $user = $this->security->getUser() ;

                if($user && $newsletter) {
                    return $this->userUtils->isSubscribedToNewsletter($user, $newsletter) ;
                }

                return false ;
        }

        public function reverseTransform($isSubscribed)
        {
            // Impossible de retrouver la newsletter depuis sa valeur booléenne.
            //throw new TransformationFailedException('Impossible de retrouver la newsletter depuis sa valeur booléenne.') ;

            return false ;
        }
}