test deep clone

Author: DavidBadura

composer.json

@@ -24,6 +24,7 @@
     "psr/cache": "^2.0.0 || ^3.0.0",
     "psr/simple-cache": "^2.0.0 || ^3.0.0",
     "symfony/event-dispatcher": "^5.4.29 || ^6.4.0 || ^7.0.0 || ^8.0.0",
+    "symfony/polyfill-deepclone": "^1.37",
     "symfony/type-info": "^7.3.0 || ^8.0.0"
   },
   "require-dev": {

composer.lock

@@ -5,14 +5,15 @@
 namespace Patchlevel\Hydrator;
 
 use Patchlevel\Hydrator\Guesser\BuiltInGuesser;
+use Patchlevel\Hydrator\Middleware\SymfonyTransformMiddleware;
 use Patchlevel\Hydrator\Middleware\TransformMiddleware;
 
 /** @experimental */
 final class CoreExtension implements Extension
 {
     public function configure(StackHydratorBuilder $builder): void
     {
-        $builder->addMiddleware(new TransformMiddleware(), -64);
+        $builder->addMiddleware(new SymfonyTransformMiddleware(), -64);
         $builder->addGuesser(new BuiltInGuesser(), -64);
     }
 }

src/CoreExtension.php

@@ -0,0 +1,148 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Patchlevel\Hydrator\Middleware;
+
+use Patchlevel\Hydrator\CircularReference;
+use Patchlevel\Hydrator\DenormalizationFailure;
+use Patchlevel\Hydrator\HydratorWithContext;
+use Patchlevel\Hydrator\Metadata\ClassMetadata;
+use Patchlevel\Hydrator\NormalizationFailure;
+use Patchlevel\Hydrator\Normalizer\NormalizerWithContext;
+use Throwable;
+
+use function array_key_exists;
+use function array_values;
+use function spl_object_id;
+
+/** @experimental */
+final class SymfonyTransformMiddleware implements Middleware
+{
+    /** @var array<int, class-string> */
+    private array $callStack = [];
+
+    /**
+     * @param ClassMetadata<T>     $metadata
+     * @param array<string, mixed> $data
+     * @param array<string, mixed> $context
+     *
+     * @return T
+     *
+     * @template T of object
+     */
+    public function hydrate(ClassMetadata $metadata, array $data, array $context, Stack $stack): object
+    {
+        $constructorParameters = null;
+
+        $vars = [];
+
+        foreach ($metadata->properties() as $propertyMetadata) {
+            /*
+            if (!array_key_exists($propertyMetadata->fieldName(), $data)) {
+                if (!$propertyMetadata->reflection->isPromoted()) {
+                    continue;
+                }
+
+                $constructorParameters ??= $metadata->promotedConstructorDefaults();
+
+                if (!array_key_exists($propertyMetadata->propertyName, $constructorParameters)) {
+                    continue;
+                }
+
+                $vars[$propertyMetadata->propertyName] = $constructorParameters[$propertyMetadata->propertyName]->getDefaultValue();
+
+                $propertyMetadata->setValue(
+                    $object,
+                    $constructorParameters[$propertyMetadata->propertyName]->getDefaultValue(),
+                );
+
+                continue;
+            }
+            */
+
+            if ($propertyMetadata->normalizer) {
+                try {
+                    if ($propertyMetadata->normalizer instanceof NormalizerWithContext) {
+                        /** @psalm-suppress MixedAssignment */
+                        $vars[$propertyMetadata->propertyName] = $propertyMetadata->normalizer->denormalize($data[$propertyMetadata->fieldName], $context);
+                    } else {
+                        /** @psalm-suppress MixedAssignment */
+                        $vars[$propertyMetadata->propertyName] = $propertyMetadata->normalizer->denormalize($data[$propertyMetadata->fieldName]);
+                    }
+                } catch (Throwable $e) {
+                    throw new DenormalizationFailure(
+                        $metadata->className,
+                        $propertyMetadata->propertyName,
+                        $propertyMetadata->normalizer::class,
+                        $e,
+                    );
+                }
+            } else {
+                $vars[$propertyMetadata->propertyName] = $data[$propertyMetadata->fieldName];
+            }
+        }
+
+        return deepclone_hydrate(
+            $context[HydratorWithContext::OBJECT_TO_POPULATE] ?? $metadata->className(),
+            $vars,
+        );
+    }
+
+    /**
+     * @param array<string, mixed> $context
+     *
+     * @return array<string, mixed>
+     */
+    public function extract(ClassMetadata $metadata, object $object, array $context, Stack $stack): array
+    {
+        $objectId = spl_object_id($object);
+
+        if (array_key_exists($objectId, $this->callStack)) {
+            $references = array_values($this->callStack);
+            $references[] = $object::class;
+
+            throw new CircularReference($references);
+        }
+
+        $this->callStack[$objectId] = $object::class;
+
+        try {
+            $data = [];
+
+            foreach ($metadata->properties as $propertyMetadata) {
+                if ($propertyMetadata->normalizer) {
+                    try {
+                        if ($propertyMetadata->normalizer instanceof NormalizerWithContext) {
+                            /** @psalm-suppress MixedAssignment */
+                            $data[$propertyMetadata->fieldName] = $propertyMetadata->normalizer->normalize(
+                                $propertyMetadata->getValue($object),
+                                $context,
+                            );
+                        } else {
+                            /** @psalm-suppress MixedAssignment */
+                            $data[$propertyMetadata->fieldName] = $propertyMetadata->normalizer->normalize(
+                                $propertyMetadata->getValue($object),
+                            );
+                        }
+                    } catch (CircularReference $e) {
+                        throw $e;
+                    } catch (Throwable $e) {
+                        throw new NormalizationFailure(
+                            $object::class,
+                            $propertyMetadata->propertyName,
+                            $propertyMetadata->normalizer::class,
+                            $e,
+                        );
+                    }
+                } else {
+                    $data[$propertyMetadata->fieldName] = $propertyMetadata->getValue($object);
+                }
+            }
+        } finally {
+            unset($this->callStack[$objectId]);
+        }
+
+        return $data;
+    }
+}

src/Middleware/SymfonyTransformMiddleware.php

@@ -10,6 +10,7 @@
 use Patchlevel\Hydrator\Metadata\MetadataFactory;
 use Patchlevel\Hydrator\Middleware\Middleware;
 use Patchlevel\Hydrator\Middleware\Stack;
+use Patchlevel\Hydrator\Middleware\SymfonyTransformMiddleware;
 use Patchlevel\Hydrator\Middleware\TransformMiddleware;
 use Patchlevel\Hydrator\Normalizer\HydratorAwareNormalizer;
 use ReflectionClass;
@@ -27,7 +28,7 @@ final class StackHydrator implements HydratorWithContext
     /** @param list<Middleware> $middlewares */
     public function __construct(
         private readonly MetadataFactory $metadataFactory = new AttributeMetadataFactory(),
-        private readonly array $middlewares = [new TransformMiddleware()],
+        private readonly array $middlewares = [new SymfonyTransformMiddleware()],
         private readonly bool $defaultLazy = false,
     ) {
         if ($middlewares === []) {