wetterApp/lib/main.dart

import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:wetter/components/compact_weather_data.dart';
import 'package:wetter/components/main_menu.dart';
import 'package:wetter/models/daily_weather_model.dart';
import 'package:wetter/services/brightsky_api_service.dart';

void main() => runApp(const MyApp());

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  SharedPreferences? prefs;
  int _daysToLoad = 7;
  late Future<List<DailyWeatherModel>> dailyWeather;

  @override
  void initState() {
    super.initState();
    initializePreferences();
    dailyWeather =
        BrightSkyAPI.fetchForecastForTimeRange(DateTime.now(), _daysToLoad);
  }

  Future<void> initializePreferences() async {
    prefs = await SharedPreferences.getInstance();
    setState(() {
      _daysToLoad = prefs!.getInt("daysToLoad") ?? 7;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Wetter',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        textTheme: const TextTheme(
          headline1: TextStyle(fontSize: 72.0, fontWeight: FontWeight.bold),
          headline6: TextStyle(fontSize: 36.0, fontStyle: FontStyle.italic),
          bodyText2: TextStyle(fontSize: 14.0, fontFamily: 'Hind'),
        ),
      ),
      home: Scaffold(
          appBar: AppBar(
            title: const Text('Wetter in Harburg'),
          ),
          drawer: const NavBar(),
          body: RefreshIndicator(
              onRefresh: () {
                return Future(() {
                  setState(() {
                    _daysToLoad = prefs?.getInt("daysToLoad") ?? 7;
                    dailyWeather = BrightSkyAPI.fetchForecastForTimeRange(
                        DateTime.now(), _daysToLoad);
                  });
                });
              },
              child: SingleChildScrollView(
                physics: const AlwaysScrollableScrollPhysics(),
                child: Center(
                  child: FutureBuilder<List<DailyWeatherModel>>(
                    future: BrightSkyAPI.fetchForecastForTimeRange(
                        DateTime.now(), _daysToLoad),
                    builder: (context, snapshot) {
                      if (snapshot.hasData) {
                        return Column(
                            children: snapshot.data!
                                .map((e) => CompactWeatherData(e))
                                .toList());
                      } else if (snapshot.hasError) {
                        return Text('${snapshot.error}');
                      }

                      // By default, show a loading spinner.
                      return const CircularProgressIndicator();
                    },
                  ),
                ),
              ))),
    );
  }
}