Client/lib/app.dart

import 'dart:async';
import 'dart:developer';

import 'package:easy_debounce/easy_throttle.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';
import 'state/app/modules/app_modules.dart';
import 'package:persistent_bottom_nav_bar_v2/persistent_bottom_nav_bar_v2.dart';
import 'package:provider/provider.dart';
import 'package:badges/badges.dart' as badges;

import 'api/mhsl/breaker/getBreakers/getBreakersResponse.dart';
import 'api/mhsl/server/userIndex/update/updateUserindex.dart';
import 'model/breakers/Breaker.dart';
import 'model/breakers/BreakerProps.dart';
import 'model/chatList/chatListProps.dart';
import 'model/dataCleaner.dart';
import 'model/timetable/timetableProps.dart';
import 'notification/notificationController.dart';
import 'notification/notificationTasks.dart';
import 'notification/notifyUpdater.dart';
import 'storage/base/settingsProvider.dart';
import 'view/pages/overhang.dart';

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

  static PersistentTabController bottomNavigator = PersistentTabController(initialIndex: 0);

  @override
  State<App> createState() => _AppState();
}

class _AppState extends State<App> with WidgetsBindingObserver {
  late Timer refetchChats;
  late Timer updateTimings;

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    log('AppLifecycle: ${state.toString()}');

    if(state == AppLifecycleState.resumed) {
      EasyThrottle.throttle(
        'appLifecycleState',
        const Duration(seconds: 10),
        () {
          log('Refreshing due to LifecycleChange');
          NotificationTasks.updateProviders(context);
          Provider.of<TimetableProps>(context, listen: false).run();
        }
      );
    }
  }


  @override
  void initState() {
    WidgetsBinding.instance.addObserver(this);
    WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
      Provider.of<BreakerProps>(context, listen: false).run();
      Provider.of<ChatListProps>(context, listen: false).run();
    });

    updateTimings = Timer.periodic(const Duration(seconds: 30), (Timer t) => setState((){}));

    refetchChats = Timer.periodic(const Duration(seconds: 60), (timer) {
      WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
        Provider.of<ChatListProps>(context, listen: false).run();
      });
    });

    // User index
    UpdateUserIndex.index();

    // User Notifications
    if(Provider.of<SettingsProvider>(context, listen: false).val().notificationSettings.enabled) {
      update() => NotifyUpdater.registerToServer();
      FirebaseMessaging.instance.onTokenRefresh.listen((event) => update());
      update();
    }
    
    FirebaseMessaging.onMessage.listen((message) => NotificationController.onForegroundMessageHandler(message, context));
    FirebaseMessaging.onBackgroundMessage(NotificationController.onBackgroundMessageHandler);

    FirebaseMessaging.onMessageOpenedApp.listen((message) => NotificationController.onAppOpenedByNotification(message, context));
    FirebaseMessaging.instance.getInitialMessage().then((message) => message == null ? null : NotificationController.onAppOpenedByNotification(message, context));

    DataCleaner.cleanOldCache();

    super.initState();
  }

  @override
  Widget build(BuildContext context) => PersistentTabView(
      controller: App.bottomNavigator,
      navBarOverlap: const NavBarOverlap.none(),
      backgroundColor: Theme.of(context).colorScheme.primary,
      handleAndroidBackButtonPress: false,

      screenTransitionAnimation: const ScreenTransitionAnimation(curve: Curves.easeOutQuad, duration: Duration(milliseconds: 200)),
      tabs: [
        AppModule.getModule(Modules.timetable).toBottomTab(context),
        AppModule.getModule(Modules.talk).toBottomTab(
          context,
          itemBuilder: (icon) => Consumer<ChatListProps>(
            builder: (context, value, child) {
              if(value.primaryLoading()) return Icon(icon);
              var messages = value.getRoomsResponse.data.map((e) => e.unreadMessages).reduce((a, b) => a+b);
              return badges.Badge(
                showBadge: messages > 0,
                position: badges.BadgePosition.topEnd(top: -3, end: -3),
                stackFit: StackFit.loose,
                badgeStyle: badges.BadgeStyle(
                  padding: const EdgeInsets.all(3),
                  badgeColor: Theme.of(context).primaryColor,
                  elevation: 1,
                ),
                badgeContent: Text('$messages', style: const TextStyle(color: Colors.white, fontSize: 10, fontWeight: FontWeight.bold)),
                child: Icon(icon),
              );
            },
          ),
        ),
        AppModule.getModule(Modules.files).toBottomTab(context),

        PersistentTabConfig(
          screen: const Breaker(breaker: BreakerArea.more, child: Overhang()),
          item: ItemConfig(
              activeForegroundColor: Theme.of(context).primaryColor,
              inactiveForegroundColor: Theme.of(context).colorScheme.secondary,
              icon: const Icon(Icons.apps),
              title: 'Mehr'
          ),
        ),
      ],
      navBarBuilder: (config) => Style6BottomNavBar(
        navBarConfig: config,
        navBarDecoration: NavBarDecoration(
          border: const Border(top: BorderSide(width: 1, color: Colors.grey)),
          color: Theme.of(context).colorScheme.surface,
        ),
      ),
    );

  @override
  void dispose() {
    refetchChats.cancel();
    updateTimings.cancel();
    WidgetsBinding.instance.removeObserver(this);
    super.dispose();
  }
}