info_tren/lib/api/station_data.dart

import 'dart:convert';

import 'package:http/http.dart' as http;
import 'package:info_tren/api/common.dart';
import 'package:info_tren/models.dart';

Future<StationData> getStationData(String stationName, [DateTime? date]) async {
  final uri = Uri.https(authority, 'v3/stations/$stationName');
  if (date != null) {
    uri.queryParameters['date'] = date.toIso8601String();
  }
  final response = await http.get(uri);
  return StationData.fromJson(jsonDecode(response.body));
}