D1APP-22 new url & update token storing

lib/services/network/request.dart

@@ -6,7 +6,7 @@ import 'package:http/http.dart' as http;
 class RequestService {
   static late String _token;
 
-  static set token(value) => _token = value;
+  static set token(String value) => _token = value;
 
   Map get result => _body['result'] ?? const {};
   Map get errors => _body['errors'] ?? const {};

lib/services/network/request_helper.dart

@@ -3,4 +3,36 @@ class RequestHelper {
 
   static const String confirmUsername = _baseUrl + '/user/confirmUsername';
   static const String login = _baseUrl + '/user/login';
+
+  static String getRadarOverviews({
+    required int page,
+    int? radarId,
+    String? startDate,
+    String? endDate,
+    String? search,
+  }) =>
+      _baseUrl +
+      '/radar' +
+      _urlConcatGenerator([
+        MapEntry('page', page.toString()),
+        MapEntry('start', startDate),
+        MapEntry('end', endDate),
+        MapEntry('search', search),
+        MapEntry('radar', radarId?.toString()),
+      ]);
+
+  static String _urlConcatGenerator(List<MapEntry<String, String?>> additions) {
+    String result = '';
+    additions.removeWhere((element) => element.value == null);
+    if (additions.isNotEmpty) {
+      result += '?';
+      for (var i = 0; i < additions.length; i++) {
+        result += (additions[i].key + additions[i].value!);
+        if (i != additions.length) {
+          result += '&';
+        }
+      }
+    }
+    return result;
+  }
 }