update

backend/src/controllers/events.controller.ts

@@ -118,6 +118,39 @@ class EventsController {
     }
   };
 
+  // -------------------------------------------------------------------------
+  // GET /api/events/conflicts?from=<ISO>&to=<ISO>&excludeId=<uuid>
+  // -------------------------------------------------------------------------
+  checkConflicts = async (req: Request, res: Response): Promise<void> => {
+    try {
+      const fromStr = req.query.from as string | undefined;
+      const toStr = req.query.to as string | undefined;
+      const excludeId = req.query.excludeId as string | undefined;
+
+      if (!fromStr || !toStr) {
+        res.status(400).json({
+          success: false,
+          message: 'Query-Parameter "from" und "to" sind erforderlich (ISO-8601)',
+        });
+        return;
+      }
+
+      const from = new Date(fromStr);
+      const to = new Date(toStr);
+
+      if (isNaN(from.getTime()) || isNaN(to.getTime())) {
+        res.status(400).json({ success: false, message: 'Ungültiges Datumsformat' });
+        return;
+      }
+
+      const data = await eventsService.checkConflicts(from, to, excludeId);
+      res.json({ success: true, data });
+    } catch (error) {
+      logger.error('checkConflicts error', { error });
+      res.status(500).json({ success: false, message: 'Fehler bei der Konfliktprüfung' });
+    }
+  };
+
   // -------------------------------------------------------------------------
   // GET /api/events/calendar?from=<ISO>&to=<ISO>
   // -------------------------------------------------------------------------