handler method

Implementation

@override
Future<Response> handler() async {
  final camelCountryCodes = _prepareCountryCodes();
  if (camelCountryCodes is Response) {
    return camelCountryCodes;
  }

  try {
    final listAvailableDistricts =
        await dataLinkRepository.getAvailableDistricts(camelCountryCodes);

    return Response.ok(
      json.encode({'availableDistricts': listAvailableDistricts}),
      headers: {'Content-Type': 'application/json'},
    );
  } catch (e) {
    return Response.internalServerError(
      body: json.encode({'Error in ListAvailableDistrictsController: $e'}),
    );
  }
}