trip destination from current location

frontend/lib/modules/new_trip_location_search.dart

@@ -6,6 +6,7 @@ import 'dart:developer';
 
 import 'package:anyway/structs/trip.dart';
 import 'package:flutter/material.dart';
+import 'package:geolocator/geolocator.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 class NewTripLocationSearch extends StatefulWidget {
@@ -66,7 +67,17 @@ class _NewTripLocationSearchState extends State<NewTripLocationSearch> {
 
   late Widget useCurrentLocationButton = ElevatedButton(
     onPressed: () async {
-      
+      // this widget is only shown if the user has already granted location permissions
+      Position position = await Geolocator.getCurrentPosition();
+      widget.trip.landmarks.clear();
+      widget.trip.addLandmark(
+        Landmark(
+          uuid: 'pending',
+          name: 'start',
+          location: [position.latitude, position.longitude],
+          type: typeStart
+        )
+      );
     },
     child: Text('Use current location'),
   );