BUGFIX: Skip site node query in FusionView if node is already available

We use the existing method to get the site node and fall back to the query if necessary.

Author: Sebobo

Neos.Neos/Classes/View/FusionView.php

@@ -76,12 +76,7 @@ public function render(): ResponseInterface|StreamInterface
         $currentNode = $this->getCurrentNode();
 
         $subgraph = $this->contentRepositoryRegistry->subgraphForNode($currentNode);
-        $currentSiteNode = $subgraph->findClosestNode($currentNode->aggregateId, FindClosestNodeFilter::create(nodeTypes: NodeTypeNameFactory::NAME_SITE));
-
-        if (!$currentSiteNode) {
-            throw new \RuntimeException('No site node found!', 1697053346);
-        }
-
+        $currentSiteNode = $this->getCurrentSiteNode();
         $fusionRuntime = $this->getFusionRuntime($currentSiteNode);
 
         $this->setFallbackRuleFromDimension($currentNode->dimensionSpacePoint);
@@ -184,11 +179,20 @@ protected function getClosestDocumentNode(Node $node): ?Node
      */
     protected function getCurrentSiteNode(): Node
     {
-        $currentNode = $this->variables['site'] ?? null;
-        if (!$currentNode instanceof Node) {
-            throw new Exception('FusionView needs a variable \'site\' set with a Node object.', 1538996432);
+        $currentSiteNode = $this->variables['site'] ?? null;
+        if (!$currentSiteNode instanceof Node) {
+            $currentNode = $this->getCurrentNode();
+            $subgraph = $this->contentRepositoryRegistry->subgraphForNode($currentNode);
+            $currentSiteNode = $subgraph->findClosestNode(
+                $currentNode->aggregateId,
+                FindClosestNodeFilter::create(nodeTypes: NodeTypeNameFactory::NAME_SITE)
+            );
+            $this->assign('site', $currentSiteNode);
         }
-        return $currentNode;
+        if (!$currentSiteNode) {
+            throw new \RuntimeException('No site node found!', 1697053346);
+        }
+        return $currentSiteNode;
     }
 
     /**