DX: Create a RollingDate data transfer object and Form type

src/Bundle/ChillMainBundle/Form/DataMapper/RollingDateDataMapper.php

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\MainBundle\Form\DataMapper;
+
+use Chill\MainBundle\Service\RollingDate\RollingDate;
+use Symfony\Component\Form\DataMapperInterface;
+use Symfony\Component\Form\Exception;
+
+class RollingDateDataMapper implements DataMapperInterface
+{
+    public function mapDataToForms($viewData, $forms)
+    {
+        if (null === $viewData) {
+            return;
+        }
+
+        if (!$viewData instanceof RollingDate) {
+            throw new Exception\UnexpectedTypeException($viewData, RollingDate::class);
+        }
+
+        $forms = iterator_to_array($forms);
+
+        $forms['roll']->setData($viewData->getRoll());
+        $forms['fixedDate']->setData($viewData->getFixedDate());
+    }
+
+    public function mapFormsToData($forms, &$viewData): void
+    {
+        $forms = iterator_to_array($forms);
+
+        $viewData = new RollingDate(
+            $forms['roll']->getData(),
+            $forms['fixedDate']->getData()
+        );
+    }
+}