New Listings view (#192)

* completing found listings

---------

Co-authored-by: Christian Kellner <Christian.Kellner1@ibm.com>

lib/api/routes/listingsRouter.js

@@ -0,0 +1,23 @@
+import restana from 'restana';
+import * as listingStorage from '../../services/storage/listingsStorage.js';
+import { isAdmin as isAdminFn } from '../security.js';
+const service = restana();
+
+const listingsRouter = service.newRouter();
+
+listingsRouter.get('/table', async (req, res) => {
+  const { page, pageSize = 50, filter, sortfield = null, sortdir = 'asc' } = req.query || {};
+
+  const result = listingStorage.queryListings({
+    page: page ? parseInt(page, 10) : 1,
+    pageSize: pageSize ? parseInt(pageSize, 10) : 50,
+    filter: filter || undefined,
+    sortField: sortfield || null,
+    sortDir: sortdir === 'desc' ? 'desc' : 'asc',
+    userId: req.session.currentUser,
+    isAdmin: isAdminFn(req),
+  });
+  res.body = result;
+  res.send();
+});
+export { listingsRouter };