feat: add a hook for doctrine entity or document to api resource transformation

Author: mrossard

features/doctrine/transform_model.feature

@@ -0,0 +1,64 @@
+Feature: Use an entity or document transformer to return the correct ressource
+
+  @createSchema
+  @!mongodb
+  Scenario: Get transformed collection from entities
+    Given there is a TransformedDummy for date '2025-01-01'
+    When I send a "GET" request to "/transformed_dummy_entity_ressources"
+    Then the response status code should be 200
+    And the response should be in JSON
+    And the JSON node "hydra:totalItems" should be equal to 1
+
+  @!mongodb
+  Scenario: Get transform item from entity
+    Given there is a TransformedDummy for date '2025-01-01'
+    When I send a "GET" request to "/transformed_dummy_entity_ressources/1"
+    Then the response status code should be 200
+    And the response should be in JSON
+    And the JSON node "year" should exist
+    And the JSON node year should be equal to "2025"
+
+  @!mongodb
+  Scenario: Post new entity from transformed resource
+    Given I add "Content-type" header equal to "application/ld+json"
+    When I send a "POST" request to "/transformed_dummy_entity_ressources" with body:
+    """
+      {
+        "year" : 2020
+      }
+    """
+    Then the response status code should be 201
+    And the response should be in JSON
+    And the JSON node "year" should be equal to "2020"
+
+  @!mongodb
+  Scenario: Patch entity from transformed resource
+    Given there is a TransformedDummy for date '2025-01-01'
+    And I add "Content-type" header equal to "application/merge-patch+json"
+    When I send a "PATCH" request to "/transformed_dummy_entity_ressources/1" with body:
+    """
+      {
+        "year" : 2020
+      }
+    """
+    Then the response status code should be 200
+    And the response should be in JSON
+    And the JSON node "year" should be equal to "2020"
+
+  @createSchema
+  @mongodb
+  Scenario: Get collection from documents
+    Given there is a TransformedDummy for date '2025-01-01'
+    When I send a "GET" request to "/transformed_dummy_document_ressources"
+    Then the response status code should be 200
+    And the response should be in JSON
+    And the JSON node "hydra:totalItems" should be equal to 1
+
+  @mongodb
+  Scenario: Get item from document
+    Given there is a TransformedDummy for date '2025-01-01'
+    When I send a "GET" request to "/transformed_dummy_document_ressources/1"
+    Then the response status code should be 200
+    And the response should be in JSON
+    And the JSON node "year" should exist
+    And the JSON node year should be equal to "2025"

features/hydra/error.feature

@@ -16,7 +16,7 @@ Feature: Error handling
     And the header "Content-Type" should be equal to "application/problem+json; charset=utf-8"
     And the header "Link" should contain '<http://www.w3.org/ns/hydra/error>; rel="http://www.w3.org/ns/json-ld#error"'
     And the JSON node "type" should exist
-    And the JSON node "title" should not exists
+    And the JSON node "title" should not exist
     And the JSON node "hydra:title" should be equal to "An error occurred"
     And the JSON node "detail" should exist
     And the JSON node "description" should not exist

src/Doctrine/Common/State/Options.php

@@ -18,10 +18,14 @@
 class Options implements OptionsInterface
 {
     /**
-     * @param mixed $handleLinks experimental callable, typed mixed as we may want a service name in the future
+     * @param mixed $handleLinks             experimental callable, typed mixed as we may want a service name in the future
+     * @param mixed $toResourceTransformer   experimental callable, typed mixed as we may want a service name in the future
+     * @param mixed $fromResourceTransformer experimental callable, typed mixed as we may want a service name in the future
      */
     public function __construct(
         protected mixed $handleLinks = null,
+        protected mixed $toResourceTransformer = null,
+        protected mixed $fromResourceTransformer = null,
     ) {
     }
 
@@ -37,4 +41,30 @@ public function withHandleLinks(mixed $handleLinks): self
 
         return $self;
     }
+
+    public function getToResourceTransformer(): mixed
+    {
+        return $this->toResourceTransformer;
+    }
+
+    public function withToResourceTransformer(mixed $toResourceTransformer): self
+    {
+        $self = clone $this;
+        $self->toResourceTransformer = $toResourceTransformer;
+
+        return $self;
+    }
+
+    public function getFromResourceTransformer(): mixed
+    {
+        return $this->fromResourceTransformer;
+    }
+
+    public function withFromResourceTransformer(mixed $fromResourceTransformer): self
+    {
+        $self = clone $this;
+        $self->fromResourceTransformer = $fromResourceTransformer;
+
+        return $self;
+    }
 }

src/Doctrine/Common/State/PersistProcessor.php

@@ -19,14 +19,18 @@
 use ApiPlatform\State\ProcessorInterface;
 use Doctrine\Persistence\ManagerRegistry;
 use Doctrine\Persistence\ObjectManager as DoctrineObjectManager;
+use Psr\Container\ContainerInterface;
 
 final class PersistProcessor implements ProcessorInterface
 {
     use ClassInfoTrait;
     use LinksHandlerTrait;
+    use ResourceTransformerLocatorTrait;
 
-    public function __construct(private readonly ManagerRegistry $managerRegistry)
+    public function __construct(private readonly ManagerRegistry $managerRegistry,
+        ?ContainerInterface $resourceTransformerLocator = null)
     {
+        $this->resourceTransformerLocator = $resourceTransformerLocator;
     }
 
     /**
@@ -38,6 +42,12 @@ public function __construct(private readonly ManagerRegistry $managerRegistry)
      */
     public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): mixed
     {
+        // if a transformer is defined, start with that
+        $data = match ($transformer = $this->getFromResourceTransformer($operation)) {
+            null => $data,
+            default => $transformer($data, $this->getManager($operation, $this->managerRegistry)),
+        };
+
         if (
             !\is_object($data)
             || !$manager = $this->managerRegistry->getManagerForClass($class = $this->getObjectClass($data))
@@ -104,7 +114,10 @@ public function process(mixed $data, Operation $operation, array $uriVariables =
         $manager->flush();
         $manager->refresh($data);
 
-        return $data;
+        return match ($transformer = $this->getToResourceTransformer($operation)) {
+            null => $data,
+            default => $transformer($data, $operation, $uriVariables, $context),
+        };
     }
 
     /**

src/Doctrine/Common/State/ResourceTransformerInterface.php

@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Doctrine\Common\State;
+
+use Doctrine\Persistence\ObjectManager;
+
+interface ResourceTransformerInterface
+{
+    /**
+     * @param object $entityOrDocument the doctrine entity or document to make a resource from
+     *
+     * @return object the resulting ApiResource
+     */
+    public function toResource(object $entityOrDocument): object;
+
+    /**
+     * @param object        $resource      the resource you want to persist
+     * @param ObjectManager $objectManager the object manager to handle this kind of resources
+     *
+     * @return object the existing or new entity or document
+     */
+    public function fromResource(object $resource, ObjectManager $objectManager): object;
+}

src/Doctrine/Common/State/ResourceTransformerLocatorTrait.php

@@ -0,0 +1,79 @@
+<?php
+
+/*
+ * This file is part of the API Platform project.
+ *
+ * (c) Kévin Dunglas <dunglas@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ApiPlatform\Doctrine\Common\State;
+
+use ApiPlatform\Metadata\Operation;
+use Doctrine\Persistence\ManagerRegistry;
+use Doctrine\Persistence\ObjectManager;
+use Psr\Container\ContainerInterface;
+
+/**
+ * Maybe merge this and LinksHandlerLocatorTrait into a OptionsHooksLocatorTrait or something similar?
+ */
+trait ResourceTransformerLocatorTrait
+{
+    private ?ContainerInterface $resourceTransformerLocator;
+
+    protected function getToResourceTransformer(Operation $operation): ?callable
+    {
+        if (!($options = $operation->getStateOptions()) || !$options instanceof Options) {
+            return null;
+        }
+
+        $transformer = $options->getToResourceTransformer();
+        if (\is_callable($transformer)) {
+            return $transformer;
+        }
+
+        if ($this->resourceTransformerLocator && \is_string($transformer) && $this->resourceTransformerLocator->has($transformer)) {
+            return [$this->resourceTransformerLocator->get($transformer), 'toResource'];
+        }
+
+        return null;
+    }
+
+    protected function getFromResourceTransformer(Operation $operation): ?callable
+    {
+        if (!($options = $operation->getStateOptions()) || !$options instanceof Options) {
+            return null;
+        }
+
+        $transformer = $options->getFromResourceTransformer();
+        if (\is_callable($transformer)) {
+            return $transformer;
+        }
+
+        if ($this->resourceTransformerLocator && \is_string($transformer) && $this->resourceTransformerLocator->has($transformer)) {
+            return [$this->resourceTransformerLocator->get($transformer), 'fromResource'];
+        }
+
+        return null;
+    }
+
+    protected function getManager(Operation $operation, ManagerRegistry $managerRegistry): ObjectManager
+    {
+        $options = $operation->getStateOptions();
+        $entityClass = match (true) {
+            $options instanceof \ApiPlatform\Doctrine\Orm\State\Options => $options->getEntityClass(),
+            $options instanceof \ApiPlatform\Doctrine\Odm\State\Options => $options->getDocumentClass(),
+            default => null,
+        };
+
+        if ($entityClass) {
+            return $managerRegistry->getManagerForClass($entityClass);
+        }
+
+        throw new \RuntimeException('This should not be called on an operation without StateOptions');
+    }
+}

src/Doctrine/Odm/State/CollectionProvider.php

@@ -14,6 +14,7 @@
 namespace ApiPlatform\Doctrine\Odm\State;
 
 use ApiPlatform\Doctrine\Common\State\LinksHandlerLocatorTrait;
+use ApiPlatform\Doctrine\Common\State\ResourceTransformerLocatorTrait;
 use ApiPlatform\Doctrine\Odm\Extension\AggregationCollectionExtensionInterface;
 use ApiPlatform\Doctrine\Odm\Extension\AggregationResultCollectionExtensionInterface;
 use ApiPlatform\Metadata\Exception\RuntimeException;
@@ -33,15 +34,20 @@ final class CollectionProvider implements ProviderInterface
 {
     use LinksHandlerLocatorTrait;
     use LinksHandlerTrait;
+    use ResourceTransformerLocatorTrait;
     use StateOptionsTrait;
 
     /**
      * @param AggregationCollectionExtensionInterface[] $collectionExtensions
      */
-    public function __construct(ResourceMetadataCollectionFactoryInterface $resourceMetadataCollectionFactory, ManagerRegistry $managerRegistry, private readonly iterable $collectionExtensions = [], ?ContainerInterface $handleLinksLocator = null)
-    {
+    public function __construct(ResourceMetadataCollectionFactoryInterface $resourceMetadataCollectionFactory, ManagerRegistry $managerRegistry,
+        private readonly iterable $collectionExtensions = [],
+        ?ContainerInterface $handleLinksLocator = null,
+        ?ContainerInterface $resourceTransformerLocator = null,
+    ) {
         $this->resourceMetadataCollectionFactory = $resourceMetadataCollectionFactory;
         $this->handleLinksLocator = $handleLinksLocator;
+        $this->resourceTransformerLocator = $resourceTransformerLocator;
         $this->managerRegistry = $managerRegistry;
     }
 
@@ -69,13 +75,19 @@ public function provide(Operation $operation, array $uriVariables = [], array $c
             $extension->applyToCollection($aggregationBuilder, $documentClass, $operation, $context);
 
             if ($extension instanceof AggregationResultCollectionExtensionInterface && $extension->supportsResult($documentClass, $operation, $context)) {
-                return $extension->getResult($aggregationBuilder, $documentClass, $operation, $context);
+                $result = $extension->getResult($aggregationBuilder, $documentClass, $operation, $context);
+                break;
             }
         }
 
         $attribute = $operation->getExtraProperties()['doctrine_mongodb'] ?? [];
         $executeOptions = $attribute['execute_options'] ?? [];
 
-        return $aggregationBuilder->hydrate($documentClass)->getAggregation($executeOptions)->getIterator();
+        $result = $result ?? $aggregationBuilder->hydrate($documentClass)->getAggregation($executeOptions)->getIterator();
+
+        return match ($transformer = $this->getToResourceTransformer($operation)) {
+            null => $result,
+            default => array_map($transformer, iterator_to_array($result)),
+        };
     }
 }

src/Doctrine/Odm/State/ItemProvider.php

@@ -14,6 +14,7 @@
 namespace ApiPlatform\Doctrine\Odm\State;
 
 use ApiPlatform\Doctrine\Common\State\LinksHandlerLocatorTrait;
+use ApiPlatform\Doctrine\Common\State\ResourceTransformerLocatorTrait;
 use ApiPlatform\Doctrine\Odm\Extension\AggregationItemExtensionInterface;
 use ApiPlatform\Doctrine\Odm\Extension\AggregationResultItemExtensionInterface;
 use ApiPlatform\Metadata\Exception\RuntimeException;
@@ -36,15 +37,20 @@ final class ItemProvider implements ProviderInterface
 {
     use LinksHandlerLocatorTrait;
     use LinksHandlerTrait;
+    use ResourceTransformerLocatorTrait;
     use StateOptionsTrait;
 
     /**
      * @param AggregationItemExtensionInterface[] $itemExtensions
      */
-    public function __construct(ResourceMetadataCollectionFactoryInterface $resourceMetadataCollectionFactory, ManagerRegistry $managerRegistry, private readonly iterable $itemExtensions = [], ?ContainerInterface $handleLinksLocator = null)
+    public function __construct(ResourceMetadataCollectionFactoryInterface $resourceMetadataCollectionFactory, ManagerRegistry $managerRegistry,
+        private readonly iterable $itemExtensions = [],
+        ?ContainerInterface $handleLinksLocator = null,
+        ?ContainerInterface $resourceTransformerLocator = null)
     {
         $this->resourceMetadataCollectionFactory = $resourceMetadataCollectionFactory;
         $this->handleLinksLocator = $handleLinksLocator;
+        $this->resourceTransformerLocator = $resourceTransformerLocator;
         $this->managerRegistry = $managerRegistry;
     }
 
@@ -77,12 +83,18 @@ public function provide(Operation $operation, array $uriVariables = [], array $c
             $extension->applyToItem($aggregationBuilder, $documentClass, $uriVariables, $operation, $context);
 
             if ($extension instanceof AggregationResultItemExtensionInterface && $extension->supportsResult($documentClass, $operation, $context)) {
-                return $extension->getResult($aggregationBuilder, $documentClass, $operation, $context);
+                $result = $extension->getResult($aggregationBuilder, $documentClass, $operation, $context);
+                break;
             }
         }
 
         $executeOptions = $operation->getExtraProperties()['doctrine_mongodb']['execute_options'] ?? [];
 
-        return $aggregationBuilder->hydrate($documentClass)->getAggregation($executeOptions)->getIterator()->current() ?: null;
+        $result = $result ?? ($aggregationBuilder->hydrate($documentClass)->getAggregation($executeOptions)->getIterator()->current() ?: null);
+
+        return match ($transformer = $this->getToResourceTransformer($operation)) {
+            null => $result,
+            default => (null !== $result) ? $transformer($result) : null,
+        };
     }
 }