MWClash/lib/state.dart

import 'dart:async';
import 'package:animations/animations.dart';
import 'package:dynamic_color/dynamic_color.dart';
import 'package:fl_clash/clash/clash.dart';
import 'package:fl_clash/common/theme.dart';
import 'package:fl_clash/enum/enum.dart';
import 'package:fl_clash/l10n/l10n.dart';
import 'package:fl_clash/plugins/service.dart';
import 'package:fl_clash/widgets/dialog.dart';
import 'package:fl_clash/widgets/scaffold.dart';
import 'package:flutter/material.dart';
import 'package:material_color_utilities/palettes/core_palette.dart';
import 'package:package_info_plus/package_info_plus.dart';
import 'package:url_launcher/url_launcher.dart';

import 'common/common.dart';
import 'controller.dart';
import 'models/models.dart';

typedef UpdateTasks = List<FutureOr Function()>;

class GlobalState {
  static GlobalState? _instance;
  Map<CacheTag, double> cacheScrollPosition = {};
  Map<CacheTag, FixedMap<String, double>> cacheHeightMap = {};
  bool isService = false;
  Timer? timer;
  Timer? groupsUpdateTimer;
  late Config config;
  late AppState appState;
  bool isPre = true;
  String? coreSHA256;
  late PackageInfo packageInfo;
  Function? updateCurrentDelayDebounce;
  late Measure measure;
  late CommonTheme theme;
  late Color accentColor;
  CorePalette? corePalette;
  DateTime? startTime;
  UpdateTasks tasks = [];
  final navigatorKey = GlobalKey<NavigatorState>();
  late AppController appController;
  GlobalKey<CommonScaffoldState> homeScaffoldKey = GlobalKey();

  bool get isStart => startTime != null && startTime!.isBeforeNow;

  GlobalState._internal();

  factory GlobalState() {
    _instance ??= GlobalState._internal();
    return _instance!;
  }

  initApp(int version) async {
    appState = AppState(
      version: version,
      viewSize: Size.zero,
      requests: FixedList(maxLength),
      logs: FixedList(maxLength),
      traffics: FixedList(30),
      totalTraffic: Traffic(),
    );
    await _initDynamicColor();
    await init();
  }

  _initDynamicColor() async {
    try {
      corePalette = await DynamicColorPlugin.getCorePalette();
      accentColor = await DynamicColorPlugin.getAccentColor() ??
          Color(defaultPrimaryColor);
    } catch (_) {}
  }

  init() async {
    packageInfo = await PackageInfo.fromPlatform();
    config = await preferences.getConfig() ??
        Config(
          themeProps: defaultThemeProps,
        );
    await globalState.migrateOldData(config);
    await AppLocalizations.load(
      utils.getLocaleForString(config.appSetting.locale) ??
          WidgetsBinding.instance.platformDispatcher.locale,
    );
  }

  String get ua => config.patchClashConfig.globalUa ?? packageInfo.ua;

  startUpdateTasks([UpdateTasks? tasks]) async {
    if (timer != null && timer!.isActive == true) return;
    if (tasks != null) {
      this.tasks = tasks;
    }
    await executorUpdateTask();
    timer = Timer(const Duration(seconds: 1), () async {
      startUpdateTasks();
    });
  }

  executorUpdateTask() async {
    for (final task in tasks) {
      await task();
    }
    timer = null;
  }

  stopUpdateTasks() {
    if (timer == null || timer?.isActive == false) return;
    timer?.cancel();
    timer = null;
  }

  handleStart([UpdateTasks? tasks]) async {
    startTime ??= DateTime.now();
    await clashCore.startListener();
    await service?.startVpn();
    startUpdateTasks(tasks);
  }

  Future updateStartTime() async {
    startTime = await clashLib?.getRunTime();
  }

  Future handleStop() async {
    startTime = null;
    await clashCore.stopListener();
    await service?.stopVpn();
    stopUpdateTasks();
  }

  Future<bool?> showMessage({
    String? title,
    required InlineSpan message,
    String? confirmText,
    bool cancelable = true,
  }) async {
    return await showCommonDialog<bool>(
      child: Builder(
        builder: (context) {
          return CommonDialog(
            title: title ?? appLocalizations.tip,
            actions: [
              if (cancelable)
                TextButton(
                  onPressed: () {
                    Navigator.of(context).pop(false);
                  },
                  child: Text(appLocalizations.cancel),
                ),
              TextButton(
                onPressed: () {
                  Navigator.of(context).pop(true);
                },
                child: Text(confirmText ?? appLocalizations.confirm),
              )
            ],
            child: Container(
              width: 300,
              constraints: const BoxConstraints(maxHeight: 200),
              child: SingleChildScrollView(
                child: SelectableText.rich(
                  TextSpan(
                    style: Theme.of(context).textTheme.labelLarge,
                    children: [message],
                  ),
                  style: const TextStyle(
                    overflow: TextOverflow.visible,
                  ),
                ),
              ),
            ),
          );
        },
      ),
    );
  }

  Future<T?> showCommonDialog<T>({
    required Widget child,
    bool dismissible = true,
  }) async {
    return await showModal<T>(
      context: navigatorKey.currentState!.context,
      configuration: FadeScaleTransitionConfiguration(
        barrierColor: Colors.black38,
        barrierDismissible: dismissible,
      ),
      builder: (_) => child,
      filter: commonFilter,
    );
  }

  Future<T?> safeRun<T>(
    FutureOr<T> Function() futureFunction, {
    String? title,
    bool silence = true,
  }) async {
    try {
      final res = await futureFunction();
      return res;
    } catch (e) {
      commonPrint.log("$e");
      if (silence) {
        showNotifier(e.toString());
      } else {
        showMessage(
          title: title ?? appLocalizations.tip,
          message: TextSpan(
            text: e.toString(),
          ),
        );
      }
      return null;
    }
  }

  showNotifier(String text) {
    if (text.isEmpty) {
      return;
    }
    navigatorKey.currentContext?.showNotifier(text);
  }

  openUrl(String url) async {
    final res = await showMessage(
      message: TextSpan(text: url),
      title: appLocalizations.externalLink,
      confirmText: appLocalizations.go,
    );
    if (res != true) {
      return;
    }
    launchUrl(Uri.parse(url));
  }

  Future<void> migrateOldData(Config config) async {
    final clashConfig = await preferences.getClashConfig();
    if (clashConfig != null) {
      config = config.copyWith(
        patchClashConfig: clashConfig,
      );
      preferences.clearClashConfig();
      preferences.saveConfig(config);
    }
  }

  CoreState getCoreState() {
    final currentProfile = config.currentProfile;
    return CoreState(
      vpnProps: config.vpnProps,
      onlyStatisticsProxy: config.appSetting.onlyStatisticsProxy,
      currentProfileName: currentProfile?.label ?? currentProfile?.id ?? "",
      bypassDomain: config.networkProps.bypassDomain,
    );
  }

  getUpdateConfigParams([bool? isPatch]) {
    final currentProfile = config.currentProfile;
    final clashConfig = config.patchClashConfig;
    final routeAddress =
        config.networkProps.routeMode == RouteMode.bypassPrivate
            ? defaultBypassPrivateRouteAddress
            : clashConfig.tun.routeAddress;
    return UpdateConfigParams(
      profileId: config.currentProfileId ?? "",
      config: clashConfig.copyWith(
        globalUa: ua,
        tun: clashConfig.tun.copyWith(
          autoRoute: routeAddress.isEmpty ? true : false,
          routeAddress: routeAddress,
        ),
        rule: currentProfile?.overrideData.runningRule ?? [],
      ),
      params: ConfigExtendedParams(
        isPatch: isPatch ?? false,
        selectedMap: currentProfile?.selectedMap ?? {},
        overrideDns: config.overrideDns,
        testUrl: config.appSetting.testUrl,
        overrideRule:
            currentProfile?.overrideData.rule.type == OverrideRuleType.override
                ? true
                : false,
      ),
    );
  }
}

final globalState = GlobalState();