Add data transformation interface for filters

Introduced a new DataTransformerFilterInterface that allows transforming filter's form data before it is processed. Updated the FilterType file to add a view transformer if the filter implements this new interface. This new transformation process caters to transforming existing data in saved exports and replacing it with default values.

src/Bundle/ChillMainBundle/Form/Type/Export/FilterType.php

@@ -11,8 +11,10 @@ declare(strict_types=1);
 
 namespace Chill\MainBundle\Form\Type\Export;
 
+use Chill\MainBundle\Export\DataTransformerFilterInterface;
 use Chill\MainBundle\Export\FilterInterface;
 use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\CallbackTransformer;
 use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
 use Symfony\Component\Form\Extension\Core\Type\FormType;
 use Symfony\Component\Form\FormBuilderInterface;
@@ -43,6 +45,15 @@ class FilterType extends AbstractType
         ]);
         $filter->buildForm($filterFormBuilder);
 
+        if ($filter instanceof DataTransformerFilterInterface) {
+            $filterFormBuilder->addViewTransformer(new CallbackTransformer(
+                fn (?array $data) => $data,
+                function (?array $data) use ($filter) {
+                    return $filter->transformData($data);
+                },
+            ));
+        }
+
         $builder->add($filterFormBuilder);
     }