A lot of things.

Service/Club/EditorService.php

@@ -0,0 +1,73 @@
+<?php
+
+namespace RomhackPlaza\Master\Service\Club;
+
+use RomhackPlaza\Master\Entity\Club;
+use XF\App;
+use XF\Entity\Forum;
+use XF\Entity\Node;
+use XF\Http\Upload;
+use XF\Service\AbstractService;
+use XF\Service\ValidateAndSavableTrait;
+use XF\Util\File;
+
+class EditorService extends AbstractService
+{
+    use ValidateAndSavableTrait;
+
+    /**
+     * @var Club
+     */
+    protected $club;
+
+    public function __construct(App $app, Club $club)
+    {
+        parent::__construct($app);
+
+        $this->club = $club;
+    }
+
+    public function setContent(string $title, string $description)
+    {
+        $this->club->title = $title;
+        $this->club->description = $description;
+    }
+
+    public function setBannerUpload(?Upload $upload = null)
+    {
+        if( $upload ){
+            $upload->requireImage();
+            if( $upload->isValid() ){
+                $path = 'data://club_banners/' . $this->club->club_id . '.jpg';
+                if(File::copyFileToAbstractedPath($upload->getFileWrapper()->getFilePath(), $path)){
+                    $this->club->banner_date = \XF::$time;
+                }
+            }
+        }
+    }
+
+    protected function syncForumNode()
+    {
+        if( $this->club->Forum && $this->club->Forum->Node )
+        {
+            $node = $this->club->Forum->Node;
+            $node->title = $this->club->title;
+            $node->description = $this->club->description;
+            $node->save();
+        }
+    }
+
+    protected function _validate()
+    {
+        $this->club->preSave();
+        return $this->club->getErrors();
+    }
+
+    protected function _save()
+    {
+        $this->club->save();
+        $this->syncForumNode();
+
+        return $this->club;
+    }
+}