info_tren/lib/api/train_data.dart

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Dart

import 'package:http/http.dart' as http;
import 'package:info_tren/api/common.dart';
import 'package:info_tren/models.dart';
Future<TrainData> getTrain(String trainNumber, {DateTime? date}) async {
date ??= DateTime.now();
final response = await http.get(Uri.https(authority, 'v2/train/$trainNumber', {
'date': date.toUtc().toIso8601String(),
}),);
return trainDataFromJson(response.body);
}