UserSettingDataMapper.php

<?php

namespace AppBundle\Form\DataMapper;

use Symfony\Component\Form\DataMapperInterface;
use Symfony\Component\Form\Exception\UnexpectedTypeException;
use Symfony\Component\Security\Core\User\UserInterface;
class UserSettingDataMapper implements DataMapperInterface
{
    public function mapDataToForms($data, $forms)
    {
        if (!$data instanceof UserInterface) {
            throw new UnexpectedTypeException($data, 'must be instance of Symfony\Component\Security\Core\User\UserInterface');
        }
        
        foreach ($forms as $form) {
            /** @var string */
            $key = $form->getName();
            /** @var \Symfony\Component\Form\FormConfigInterface */
            $config = $form->getConfig();
            /** @var boolean */
            $hasSetting = $data->hasSetting($key);
            /** @var \AppBundle\Entity\UserSetting */
            $setting = $data->getSetting($key);
            
            if ($hasSetting && $config->getMapped()) {
                $form->setData($setting->getValue());
            } else {
                $form->setData($config->setData());
            }
        }
    }

    public function mapFormsToData($forms, $data)
    {
        if (null === $data) {
            return;
        }
        
        if (!$data instanceof UserInterface) {
            throw new UnexpectedTypeException($data, 'must be instance of Symfony\Component\Security\Core\User\UserInterface');
        }
        
        foreach ($forms as $form) {
            /** @var string */
            $key = $form->getName();
            /** @var \Symfony\Component\Form\FormConfigInterface */
            $config = $form->getConfig();
            /** @var boolean */
            $hasSetting = $data->hasSetting($key);
            /** @var \AppBundle\Entity\UserSetting */
            $setting = $data->getSetting($key);
            
            if ($config->getMapped() && $form->isSubmitted() && $form->isSynchronized() && !$form->isDisabled()) {
                if (null === $form->getData()) {
                    $data->removeSetting($setting);
                } else {
                    $setting->setValue($form->getData());
                    $data->addSetting($setting);
                }
            }
        }
    }
}