rog_app/lib/services/reacking_service.dart

import 'dart:convert';

import 'package:http/http.dart' as http;
import 'package:rogapp/utils/const.dart';

class TrackingService {
  static Future<Map<String, dynamic>> addTrack(
      String userId, double lat, double lon) async {
    Map<String, dynamic> cats = {};
    String serverUrl = ConstValues.currentServer();
    String url = '$serverUrl/api/track/';
    //print('++++++++$url');
    final geom = '{"type": "MULTIPOINT", "coordinates": [[$lon, $lat]]}';
    final http.Response response = await http.post(
      Uri.parse(url),
      headers: <String, String>{
        'Content-Type': 'application/json; charset=UTF-8',
      },
      body: jsonEncode(<String, String>{'user_id': userId, 'geom': geom}),
    );

    if (response.statusCode == 200) {
      cats = json.decode(utf8.decode(response.bodyBytes));
    }
    return cats;
  }
}