PhysiGo/app/lib/challenges/challenge.dart

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';
import 'package:latlong2/latlong.dart';

import '../navigation/navigation_page.dart';

Widget buildChallenge(DocumentSnapshot<Map<String, dynamic>> data, BuildContext context) {
  final LatLng coordinates =
      LatLng(data.get('location')['geopoint'].latitude, data.get('location')['geopoint'].longitude);
  return Center(
    child: Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        const Text('Your challenge for this week:'),
        Text(data.get('name')),
        TextButton(
            onPressed: () {
              Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) => NavigationPage(
                    destination: coordinates,
                  ),
                ),
              );
            },
            child: const Text('Navigate me'))
      ],
    ),
  );
}