fix backend error of data transformer

src/Bundle/ChillMainBundle/Form/Type/DataTransformer/EntityToJsonTransformer.php

@@ -12,11 +12,16 @@ declare(strict_types=1);
 namespace Chill\MainBundle\Form\Type\DataTransformer;
 
 use Chill\MainBundle\Entity\User;
+use Chill\PersonBundle\Entity\Person;
+use Chill\ThirdPartyBundle\Entity\ThirdParty;
 use Symfony\Component\Form\DataTransformerInterface;
 use Symfony\Component\Form\Exception\TransformationFailedException;
+use Symfony\Component\Serializer\Exception\UnexpectedValueException as ExceptionUnexpectedValueException;
 use Symfony\Component\Serializer\Normalizer\AbstractNormalizer;
 use Symfony\Component\Serializer\Normalizer\DenormalizerInterface;
 use Symfony\Component\Serializer\SerializerInterface;
+use UnexpectedValueException;
+
 use function array_key_exists;
 
 class EntityToJsonTransformer implements DataTransformerInterface
@@ -41,6 +46,8 @@ class EntityToJsonTransformer implements DataTransformerInterface
     {
         $denormalized = json_decode($value, true);
 
+        dump($value);
+
         if ($this->multiple) {
             if (null === $denormalized) {
                 return [];
@@ -52,6 +59,10 @@ class EntityToJsonTransformer implements DataTransformerInterface
             );
         }
 
+        if ($value === '') {
+            return null;
+        }
+
         return $this->denormalizeOne($denormalized);
     }
 
@@ -69,7 +80,7 @@ class EntityToJsonTransformer implements DataTransformerInterface
         ]);
     }
 
-    private function denormalizeOne(array $item): User
+    private function denormalizeOne(array $item)
     {
         if (!array_key_exists('type', $item)) {
             throw new TransformationFailedException('the key "type" is missing on element');
@@ -79,10 +90,24 @@ class EntityToJsonTransformer implements DataTransformerInterface
             throw new TransformationFailedException('the key "id" is missing on element');
         }
 
+        switch ($this->type) {
+            case 'user':
+                $class = User::class;
+                break;
+            case 'person':
+                $class = Person::class;
+                break;
+            case 'thirdparty':
+                $class = ThirdParty::class;
+                break;
+            default:
+                throw new \UnexpectedValueException('This type is not supported');
+        }
+
         return
             $this->denormalizer->denormalize(
                 ['type' => $item['type'], 'id' => $item['id']],
-                $this->type,
+                $class,
                 'json',
                 [AbstractNormalizer::GROUPS => ['read']],
             );