DX: Add validation to PickRolingDateType

It is not possible to pick a fixed date when not setting a fixed date

src/Bundle/ChillMainBundle/Form/Type/PickRollingDateType.php

@@ -17,6 +17,8 @@ use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
+use Symfony\Component\Validator\Constraints\Callback;
+use Symfony\Component\Validator\Context\ExecutionContextInterface;
 
 class PickRollingDateType extends AbstractType
 {
@@ -45,6 +47,21 @@ class PickRollingDateType extends AbstractType
         $resolver->setDefaults([
             'class' => RollingDate::class,
             'empty_data' => new RollingDate(RollingDate::T_TODAY),
+            'constraints' => [
+                new Callback([$this, 'validate'])
+            ]
         ]);
     }
+
+    public function validate($data, ExecutionContextInterface $context, $payload): void
+    {
+        /** @var RollingDate $data */
+        if (RollingDate::T_FIXED_DATE === $data->getRoll() && null === $data->getFixedDate()) {
+            $context
+                ->buildViolation('rolling_date.When fixed date is selected, you must provide a date')
+                ->atPath('roll')
+                ->addViolation()
+            ;
+        }
+    }
 }

src/Bundle/ChillMainBundle/Service/RollingDate/RollingDate.php

@@ -84,12 +84,12 @@ class RollingDate
         $this->fixedDate = $fixedDate;
     }
 
-    public function getFixedDate(): DateTimeImmutable
+    public function getFixedDate(): ?DateTimeImmutable
     {
         return $this->fixedDate;
     }
 
-    public function getPivotDate(): ?DateTimeImmutable
+    public function getPivotDate(): DateTimeImmutable
     {
         return $this->pivotDate;
     }