Added an ImageVariationIdentifier enum with the variations list (#38)

Author: Bertrand Dunogier

Resources/config/domain_content.yml

@@ -48,3 +48,5 @@ services:
     BD\EzPlatformGraphQLBundle\DomainContent\FieldValueBuilder\SelectionFieldValueBuilder:
         tags:
             - {name: ezplatform_graphql.field_value_builder, type: 'ezselection'}
+
+    BD\EzPlatformGraphQLBundle\Schema\ImagesVariationsBuilder: ~

Schema/ImagesVariationsBuilder.php

@@ -0,0 +1,36 @@
+<?php
+namespace BD\EzPlatformGraphQLBundle\Schema;
+
+use eZ\Bundle\EzPublishCoreBundle\DependencyInjection\Configuration\ConfigResolver;
+
+/**
+ * Generates the ImageVariationIdentifier enum that indexes images variations identifiers.
+ */
+class ImagesVariationsBuilder implements SchemaBuilder
+{
+    /**
+     * @var ConfigResolver
+     */
+    private $configResolver;
+
+    public function __construct(ConfigResolver $configResolver)
+    {
+        $this->configResolver = $configResolver;
+    }
+
+    public function build(array &$schema)
+    {
+        $schema['ImageVariationIdentifier'] = [
+            'type' => 'enum',
+            'config' => [
+                'values' => []
+            ]
+        ];
+
+        $values =& $schema['ImageVariationIdentifier']['config']['values'];
+
+        foreach (array_keys($this->configResolver->getParameter('image_variations')) as $variationIdentifier) {
+            $values[$variationIdentifier] = [];
+        }
+    }
+}