fix normalization for docgen

src/Bundle/ChillMainBundle/Serializer/Normalizer/PhonenumberNormalizer.php

@@ -16,10 +16,11 @@ use libphonenumber\PhoneNumber;
 use libphonenumber\PhoneNumberUtil;
 use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
 use Symfony\Component\Serializer\Exception\UnexpectedValueException;
+use Symfony\Component\Serializer\Normalizer\ContextAwareNormalizerInterface;
 use Symfony\Component\Serializer\Normalizer\DenormalizerInterface;
 use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
 
-class PhonenumberNormalizer implements NormalizerInterface, DenormalizerInterface
+class PhonenumberNormalizer implements ContextAwareNormalizerInterface, DenormalizerInterface
 {
     private string $defaultCarrierCode;
 
@@ -53,6 +54,10 @@ class PhonenumberNormalizer implements NormalizerInterface, DenormalizerInterfac
 
     public function normalize($object, ?string $format = null, array $context = []): string
     {
+        if ($format === 'docgen' && null === $object) {
+            return '';
+        }
+
         return $this->phoneNumberUtil->formatOutOfCountryCallingNumber($object, $this->defaultCarrierCode);
     }
 
@@ -61,8 +66,18 @@ class PhonenumberNormalizer implements NormalizerInterface, DenormalizerInterfac
         return 'libphonenumber\PhoneNumber' === $type;
     }
 
-    public function supportsNormalization($data, ?string $format = null)
+    public function supportsNormalization($data, ?string $format = null, array $context = []): bool
     {
-        return $data instanceof PhoneNumber;
+        if ($data instanceof PhoneNumber && $format === 'json') {
+            return true;
+        }
+
+        if ($format === 'docgen' && (
+            $data instanceof PhoneNumber || PhoneNumber::class === ($context['docgen:expects'] ?? null)
+            )) {
+            return true;
+        }
+
+        return false;
     }
 }