feat: implement notification system with polling and event handling; add device ID middleware and cleanup logic

CollabTableServer/src/routes/notificationRoutes.ts

@@ -0,0 +1,44 @@
+import { Router, Request, Response } from 'express';
+import { dbAdapter } from '../db';
+
+const router = Router();
+
+// GET /api/notifications/poll?since=timestampMs
+router.get('/notifications/poll', async (req: Request, res: Response) => {
+  try {
+    const sinceRaw = (req.query.since as string) || '0';
+    const since = Number(sinceRaw);
+    const deviceId = (req as any).deviceId as string | undefined;
+
+    const params: any[] = [isFinite(since) && since > 0 ? since : 0];
+    let sql = 'SELECT * FROM notifications WHERE createdAt > ?';
+
+    if (deviceId && deviceId.length > 0) {
+      sql += ' AND (deviceIdOrigin IS NULL OR deviceIdOrigin <> ?)';
+      params.push(deviceId);
+    }
+
+    sql += ' ORDER BY createdAt ASC LIMIT 500';
+
+    const rows = await dbAdapter.queryAll(sql, params);
+
+    // Normalize keys in case of differing DB casing
+    const pick = (obj: any, a: string, b: string) => obj[a] ?? obj[b];
+    const events = (rows as any[]).map(r => ({
+      id: r.id,
+      deviceIdOrigin: pick(r, 'deviceIdOrigin', 'deviceidorigin') || undefined,
+      eventType: pick(r, 'eventType', 'eventtype'),
+      entityType: pick(r, 'entityType', 'entitytype'),
+      entityId: pick(r, 'entityId', 'entityid') || undefined,
+      listId: pick(r, 'listId', 'listid') || undefined,
+      createdAt: pick(r, 'createdAt', 'createdat')
+    }));
+
+    res.json({ notifications: events, serverTimestamp: Date.now() });
+  } catch (e) {
+    console.error('[NOTIF] Poll failed:', e);
+    res.status(500).json({ error: 'Failed to poll notifications' });
+  }
+});
+
+export default router;