class ProductTypeExtension extends AbstractTypeExtension
{
    public $app;

    public function __construct($app)
    {
        $this->app = $app;
    }

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $app = $this->app;
        if (!$app->isGranted('ROLE_ADMIN')) {
            return;
        }

        $product_id = $options['data']->getId();
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setRequired('data');
    }

    public function getExtendedType()
    {
        return 'admin_product';
    }
}