Fix

controller/WebhookController.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace OCA\Deckflow\Controller;
+
+use OCP\AppFramework\Controller;
+use OCP\IRequest;
+use OCA\Deckflow\Service\WorkflowService;
+
+class WebhookController extends Controller {
+
+    private $workflowService;
+
+    public function __construct(IRequest $request, WorkflowService $workflowService) {
+        parent::__construct('deckflow', $request);
+        $this->workflowService = $workflowService;
+    }
+
+    public function moveCards() {
+        $deckId = $_POST['deckId'];
+        $sourceStackId = $_POST['sourceStackId'];
+        $targetStackId = $_POST['targetStackId'];
+
+        $this->workflowService->moveOverdueCards($deckId, $sourceStackId, $targetStackId);
+    }
+}