IBX-8534: Added relationList helper

src/bundle/Core/Resources/config/helpers.yml

@@ -65,3 +65,7 @@ services:
     Ibexa\Bundle\Core\SiteAccess\Config\IOConfigResolver:
         arguments:
             $complexConfigProcessor: '@Ibexa\Bundle\Core\SiteAccess\Config\ComplexConfigProcessor'
+
+    Ibexa\Core\Helper\RelationListHelper:
+        arguments:
+            $contentService: '@ibexa.api.service.content'

src/lib/Helper/RelationListHelper.php

@@ -0,0 +1,47 @@
+<?php
+
+/**
+ * @copyright Copyright (C) Ibexa AS. All rights reserved.
+ * @license For full copyright and license information view LICENSE file distributed with this source code.
+ */
+declare(strict_types=1);
+
+namespace Ibexa\Core\Helper;
+
+use Ibexa\Contracts\Core\Repository\ContentService;
+use Ibexa\Contracts\Core\Repository\Iterator\BatchIterator;
+use Ibexa\Contracts\Core\Repository\Iterator\BatchIteratorAdapter\RelationListIteratorAdapter;
+use Ibexa\Contracts\Core\Repository\Values\Content\VersionInfo;
+
+final class RelationListHelper
+{
+    public function __construct(
+        private readonly ContentService $contentService
+    ) {
+    }
+
+    /**
+     * @return \Ibexa\Core\Repository\Values\Content\Relation[]
+     */
+    public function getRelations(VersionInfo $versionInfo): array
+    {
+        $relationListIterator = new BatchIterator(
+            new RelationListIteratorAdapter(
+                $this->contentService,
+                $versionInfo
+            )
+        );
+
+        $relations = [];
+        /** @var \Ibexa\Contracts\Core\Repository\Values\Content\RelationList\RelationListItemInterface $relationListItem */
+        foreach ($relationListIterator as $relationListItem) {
+            if ($relationListItem->hasRelation()) {
+                /** @var \Ibexa\Core\Repository\Values\Content\Relation $relation */
+                $relation = $relationListItem->getRelation();
+                $relations[] = $relation;
+            }
+        }
+
+        return $relations;
+    }
+}