IBX-2870: Implemented ImageAssetMapper strategy needed for DAM and GraphQL synchronization (#126)

* IBX-2870: Implemented ImageAssetMapper strategy

* IBX-2870: Removed the strategy interface

* IBX-2870: Moved Mapper to GraphQL bundle

* IBX-2870: CS

* IBX-2870: Applied review remarks

Author: barw4

src/GraphQL/Mapper/ContentImageAssetMapperStrategy.php

@@ -0,0 +1,52 @@
+<?php
+
+/**
+ * @copyright Copyright (C) eZ Systems AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+namespace Ibexa\GraphQL\GraphQL\Mapper;
+
+use eZ\Publish\API\Repository\Values\Content\Field;
+use eZ\Publish\API\Repository\Values\Content\Query\Criterion;
+use eZ\Publish\Core\FieldType\ImageAsset;
+use EzSystems\EzPlatformGraphQL\GraphQL\DataLoader\ContentLoader;
+
+final class ContentImageAssetMapperStrategy implements ImageAssetMapperStrategyInterface
+{
+    /* @var \eZ\Publish\Core\FieldType\ImageAsset\AssetMapper */
+    private $assetMapper;
+
+    /** @var \EzSystems\EzPlatformGraphQL\GraphQL\DataLoader\ContentLoader */
+    private $contentLoader;
+
+    public function __construct(
+        ImageAsset\AssetMapper $assetMapper,
+        ContentLoader $contentLoader
+    ) {
+        $this->assetMapper = $assetMapper;
+        $this->contentLoader = $contentLoader;
+    }
+
+    public function canProcess(ImageAsset\Value $value): bool
+    {
+        return $value->source === null;
+    }
+
+    /**
+     * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException
+     * @throws \eZ\Publish\API\Repository\Exceptions\InvalidArgumentException|
+     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException
+     */
+    public function process(ImageAsset\Value $value): Field
+    {
+        $assetField = $this->assetMapper->getAssetField(
+            $this->contentLoader->findSingle(new Criterion\ContentId($value->destinationContentId))
+        );
+
+        if (empty($assetField->value->alternativeText)) {
+            $assetField->value->alternativeText = $value->alternativeText;
+        }
+
+        return $assetField;
+    }
+}

src/GraphQL/Mapper/ImageAssetMapperStrategyInterface.php

@@ -0,0 +1,17 @@
+<?php
+
+/**
+ * @copyright Copyright (C) eZ Systems AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+namespace Ibexa\GraphQL\GraphQL\Mapper;
+
+use eZ\Publish\API\Repository\Values\Content\Field;
+use eZ\Publish\Core\FieldType\ImageAsset;
+
+interface ImageAssetMapperStrategyInterface
+{
+    public function canProcess(ImageAsset\Value $value): bool;
+
+    public function process(ImageAsset\Value $value): Field;
+}

src/GraphQL/Resolver/ImageAssetFieldResolver.php

@@ -6,52 +6,45 @@
  */
 namespace EzSystems\EzPlatformGraphQL\GraphQL\Resolver;
 
-use eZ\Publish\API\Repository\Values\Content\Query\Criterion;
-use eZ\Publish\Core\FieldType\ImageAsset\AssetMapper;
-use EzSystems\EzPlatformGraphQL\GraphQL\DataLoader\ContentLoader;
 use EzSystems\EzPlatformGraphQL\GraphQL\Value\Field;
+use Ibexa\GraphQL\GraphQL\Mapper\ImageAssetMapperStrategyInterface;
 
 /**
  * @internal
  */
 class ImageAssetFieldResolver
 {
+    /* @var array<\Ibexa\Core\FieldType\ImageAsset\ImageAssetMapperStrategyInterface> */
+    private $strategies;
+
     /**
-     * @var DomainContentResolver
-     */
-    private $domainContentResolver;
-    /**
-     * @var ContentLoader
-     */
-    private $contentLoader;
-    /**
-     * @var AssetMapper
+     * @param iterable<\Ibexa\Core\FieldType\ImageAsset\ImageAssetMapperStrategyInterface> $strategies
      */
-    private $assetMapper;
-
-    public function __construct(ContentLoader $contentLoader, DomainContentResolver $domainContentResolver, AssetMapper $assetMapper)
+    public function __construct(iterable $strategies)
     {
-        $this->domainContentResolver = $domainContentResolver;
-        $this->contentLoader = $contentLoader;
-        $this->assetMapper = $assetMapper;
+        foreach ($strategies as $strategy) {
+            if ($strategy instanceof ImageAssetMapperStrategyInterface) {
+                $this->strategies[] = $strategy;
+            }
+        }
     }
 
-    public function resolveDomainImageAssetFieldValue(Field $field)
+    public function resolveDomainImageAssetFieldValue(Field $field): ?Field
     {
         $destinationContentId = $field->value->destinationContentId;
 
         if ($destinationContentId === null) {
             return null;
         }
 
-        $assetField = $this->assetMapper->getAssetField(
-            $this->contentLoader->findSingle(new Criterion\ContentId($destinationContentId))
-        );
+        foreach ($this->strategies as $strategy) {
+            if ($strategy->canProcess($field->value)) {
+                $assetField = $strategy->process($field->value);
 
-        if (empty($assetField->value->alternativeText)) {
-            $assetField->value->alternativeText = $field->value->alternativeText;
+                return Field::fromField($assetField);
+            }
         }
 
-        return Field::fromField($assetField);
+        return null;
     }
 }

src/Resources/config/services/resolvers.yaml

@@ -126,6 +126,8 @@ services:
             - { name: overblog_graphql.resolver, alias: "DateTimeFormat", method: "resolveDateToFormat"}
 
     EzSystems\EzPlatformGraphQL\GraphQL\Resolver\ImageAssetFieldResolver:
+        arguments:
+            $strategies: !tagged_iterator ibexa.field_type.image_asset.mapper.strategy
         tags:
             - { name: overblog_graphql.resolver, alias: "DomainImageAssetFieldValue", method: "resolveDomainImageAssetFieldValue"}
 

src/Resources/config/services/services.yaml

@@ -21,3 +21,10 @@ services:
     EzSystems\EzPlatformGraphQL\Schema\Domain\Content\NameHelper:
         arguments:
             $fieldNameOverrides: '%ezplatform_graphql.schema.content.field_name.override%'
+
+    Ibexa\GraphQL\GraphQL\Mapper\ContentImageAssetMapperStrategy:
+        arguments:
+            $assetMapper: '@eZ\Publish\Core\FieldType\ImageAsset\AssetMapper'
+            $contentLoader: '@EzSystems\EzPlatformGraphQL\GraphQL\DataLoader\ContentLoader'
+        tags:
+            - { name: ibexa.field_type.image_asset.mapper.strategy, priority: 0 }