feat(main): Make groups reorderable

src/Form/DataHandler/CustomHtmlGroupDataHandler.php

@@ -5,6 +5,7 @@ namespace Websmid\CustomHtml\Form\DataHandler;
 use PrestaShop\PrestaShop\Core\Form\IdentifiableObject\DataHandler\FormDataHandlerInterface;
 use Websmid\CustomHtml\Model\CustomHtmlGroup;
 use Context;
+use Db;
 use Hook;
 use Module;
 use Validate;
@@ -17,7 +18,7 @@ final class CustomHtmlGroupDataHandler implements FormDataHandlerInterface
         $group->title     = (string) $formData['title'];
         $group->hook_name = (string) $formData['hook_name'];
         $group->active    = (int) $formData['active'];
-        $group->ordering  = 0;
+        $group->ordering  = $this->getNextOrdering();
 
         if (!$group->add()) {
             return false;
@@ -28,6 +29,15 @@ final class CustomHtmlGroupDataHandler implements FormDataHandlerInterface
         return $group->id;
     }
 
+    private function getNextOrdering(): int
+    {
+        $maxOrdering = Db::getInstance()->getValue(
+            'SELECT MAX(`ordering`) FROM `' . _DB_PREFIX_ . 'ws_customhtml_group`'
+        );
+
+        return $maxOrdering !== false ? ((int) $maxOrdering + 1) : 0;
+    }
+
     public function update($id, array $formData)
     {
         $group = new CustomHtmlGroup((int) $id);