Add required normalizers

src/bundle/Resources/config/serializer.yaml

@@ -29,6 +29,14 @@ services:
         tags:
             - { name: ibexa.rest.serializer.normalizer, priority: -400 }
 
+    Ibexa\Rest\Output\Normalizer\NativeArrayObjectNormalizer:
+        tags:
+            - { name: ibexa.rest.serializer.normalizer, priority: -500 }
+
+    Ibexa\Rest\Output\Normalizer\JsonSerializableNormalizer:
+        tags:
+            - { name: ibexa.rest.serializer.normalizer, priority: -500 }
+
     ibexa.rest.serializer.object_normalizer:
         class: Symfony\Component\Serializer\Normalizer\ObjectNormalizer
         tags:

src/lib/Output/Generator/Json.php

@@ -99,7 +99,9 @@ public function getData(): DataObjectInterface
     #[\Override]
     public function getEncoderContext(array $data): array
     {
-        return [];
+        return [
+            'json_encode_options' => JSON_PRETTY_PRINT,
+        ];
     }
 
     /**

src/lib/Output/Normalizer/JsonSerializableNormalizer.php

@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * @copyright Copyright (C) Ibexa AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+declare(strict_types=1);
+
+namespace Ibexa\Rest\Output\Normalizer;
+
+use JsonSerializable;
+use Symfony\Component\Serializer\Normalizer\NormalizerAwareInterface;
+use Symfony\Component\Serializer\Normalizer\NormalizerAwareTrait;
+use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
+
+final class JsonSerializableNormalizer implements NormalizerInterface, NormalizerAwareInterface
+{
+    use NormalizerAwareTrait;
+
+    /**
+     * @param array<mixed> $context
+     *
+     * {@inheritDoc}
+     */
+    public function normalize($object, ?string $format = null, array $context = []): string
+    {
+        assert($object instanceof JsonSerializable);
+
+        return $object->jsonSerialize();
+    }
+
+    public function supportsNormalization($data, ?string $format = null): bool
+    {
+        return $data instanceof JsonSerializable;
+    }
+}

src/lib/Output/Normalizer/NativeArrayObjectNormalizer.php

@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * @copyright Copyright (C) Ibexa AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+declare(strict_types=1);
+
+namespace Ibexa\Rest\Output\Normalizer;
+
+use ArrayObject as NativeArrayObject;
+use Symfony\Component\Serializer\Normalizer\NormalizerAwareInterface;
+use Symfony\Component\Serializer\Normalizer\NormalizerAwareTrait;
+use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
+
+final class NativeArrayObjectNormalizer implements NormalizerInterface, NormalizerAwareInterface
+{
+    use NormalizerAwareTrait;
+
+    /**
+     * @param array<mixed> $context
+     *
+     * {@inheritDoc}
+     */
+    public function normalize($object, ?string $format = null, array $context = []): mixed
+    {
+        assert($object instanceof NativeArrayObject);
+
+        return $object->count() === 0 ? $object : $this->normalizer->normalize($object, $format, $context);
+    }
+
+    public function supportsNormalization($data, ?string $format = null): bool
+    {
+        return $data instanceof NativeArrayObject;
+    }
+}