Add endpoint to deleting labels

Author: Cyperghost

wcfsetup/install/files/lib/bootstrap/com.woltlab.wcf.php

@@ -188,6 +188,7 @@ static function (\wcf\event\endpoint\ControllerCollecting $event) {
             $event->register(new \wcf\system\endpoint\controller\core\languages\EnableLanguage());
             $event->register(new \wcf\system\endpoint\controller\core\languages\SetAsDefaultLanguage());
             $event->register(new \wcf\system\endpoint\controller\core\languages\items\DeleteItem());
+            $event->register(new \wcf\system\endpoint\controller\core\labels\DeleteLabel());
             $event->register(new \wcf\system\endpoint\controller\core\labels\groups\ChangeLabelShowOrder());
             $event->register(new \wcf\system\endpoint\controller\core\labels\groups\ChangeShowOrder());
             $event->register(new \wcf\system\endpoint\controller\core\labels\groups\DeleteGroup());

wcfsetup/install/files/lib/system/endpoint/controller/core/labels/DeleteLabel.class.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace wcf\system\endpoint\controller\core\labels;
+
+use Laminas\Diactoros\Response\JsonResponse;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use wcf\data\label\Label;
+use wcf\data\label\LabelAction;
+use wcf\http\Helper;
+use wcf\system\endpoint\DeleteRequest;
+use wcf\system\endpoint\IController;
+use wcf\system\WCF;
+
+/**
+ * API endpoint for deleting label.
+ *
+ * @author Olaf Braun
+ * @copyright 2001-2025 WoltLab GmbH
+ * @license GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since 6.2
+ */
+#[DeleteRequest("/core/labels/{id:\d+}")]
+final class DeleteLabel implements IController
+{
+    #[\Override]
+    public function __invoke(ServerRequestInterface $request, array $variables): ResponseInterface
+    {
+        $label = Helper::fetchObjectFromRequestParameter($variables['id'], Label::class);
+
+        $this->assertLabelCanBeDeleted();
+
+        (new LabelAction([$label], 'delete'))->executeAction();
+
+        return new JsonResponse([]);
+    }
+
+    private function assertLabelCanBeDeleted(): void
+    {
+        WCF::getSession()->checkPermissions(['admin.content.label.canManageLabel']);
+    }
+}