B2B-2258: Add caching capability to the storeConfig GraphQl query

Author: joanhe

app/code/Magento/StoreGraphQl/Model/Cache/Tag/Strategy/StoreConfig.php

@@ -7,9 +7,9 @@
 
 namespace Magento\StoreGraphQl\Model\Cache\Tag\Strategy;
 
-use Magento\Config\App\Config\Type\System;
 use Magento\Framework\App\Cache\Tag\StrategyInterface;
 use Magento\Framework\App\Config\ValueInterface;
+use Magento\StoreGraphQl\Model\Resolver\Store\ConfigIdentity;
 
 /**
  * Produce cache tags for store config.
@@ -26,7 +26,7 @@ public function getTags($object): array
         }
 
         if ($object instanceof ValueInterface && $object->isValueChanged()) {
-            return [System::CACHE_TAG];
+            return [ConfigIdentity::CACHE_TAG];
         }
 
         return [];

app/code/Magento/StoreGraphQl/Model/Resolver/Store/Identity.php renamed to app/code/Magento/StoreGraphQl/Model/Resolver/Store/ConfigIdentity.php

@@ -7,23 +7,20 @@
 
 namespace Magento\StoreGraphQl\Model\Resolver\Store;
 
-use Magento\Config\App\Config\Type\System;
 use Magento\Framework\GraphQl\Query\Resolver\IdentityInterface;
 
-class Identity implements IdentityInterface
+class ConfigIdentity implements IdentityInterface
 {
     /**
      * @var string
      */
-    private $cacheTag = System::CACHE_TAG;
+    const CACHE_TAG = 'gql_store_config';
 
     /**
      * @inheritDoc
      */
     public function getIdentities(array $resolvedData): array
     {
-        $ids =  empty($resolvedData) ?
-            [] : [$this->cacheTag];
-        return $ids;
+        return empty($resolvedData) ? [] : [self::CACHE_TAG];
     }
 }