reInit webApi with webview and nodes if failed (#1262)

* reInit webApi with webview and nodes if failed
if user closes and reopens the app

* after code review changes made
organized imports

* fixed melos format-check failure

app/lib/main.dart

@@ -1,6 +1,7 @@
 import 'dart:io';
 
 import 'package:connectivity_plus/connectivity_plus.dart';
+import 'package:encointer_wallet/service/substrate_api/core/dart_api.dart';
 import 'package:ew_storage/ew_storage.dart';
 import 'package:ew_http/ew_http.dart';
 import 'package:flutter/cupertino.dart';
@@ -37,6 +38,7 @@ Future<void> main({AppConfig? appConfig, AppSettings? settings}) async {
       providers: [
         RepositoryProvider(create: (context) => EwHttp()),
         RepositoryProvider(create: (context) => appConfig ?? const AppConfig()),
+        RepositoryProvider(create: (context) => SubstrateDartApi()),
       ],
       child: MultiProvider(
         providers: [

app/lib/modules/account/view/create_pin_view.dart

@@ -11,7 +11,7 @@ import 'package:encointer_wallet/common/components/loading/centered_activity_ind
 import 'package:encointer_wallet/theme/theme.dart';
 import 'package:encointer_wallet/common/components/gradient_elements.dart';
 import 'package:encointer_wallet/page-encointer/common/community_chooser_on_map.dart';
-import 'package:encointer_wallet/page-encointer/home_page.dart';
+import 'package:encointer_wallet/presentation/home/views/home_page.dart';
 import 'package:encointer_wallet/service/substrate_api/api.dart';
 import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/format.dart';

app/lib/modules/login/logic/login_store.dart

@@ -6,7 +6,7 @@ import 'package:mobx/mobx.dart';
 import 'package:provider/provider.dart';
 
 import 'package:encointer_wallet/service/log/log_service.dart';
-import 'package:encointer_wallet/page-encointer/home_page.dart';
+import 'package:encointer_wallet/presentation/home/views/home_page.dart';
 import 'package:encointer_wallet/utils/snack_bar.dart';
 import 'package:encointer_wallet/store/app.dart';
 import 'package:encointer_wallet/utils/alerts/app_alert.dart';

app/lib/modules/splash/view/splash_view.dart

@@ -1,15 +1,9 @@
-import 'package:ew_http/ew_http.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
+import 'package:encointer_wallet/service/init_web_api/init_web_api.dart';
 import 'package:encointer_wallet/modules/modules.dart';
-import 'package:encointer_wallet/config.dart';
-import 'package:encointer_wallet/utils/repository_provider.dart';
 import 'package:encointer_wallet/gen/assets.gen.dart';
-import 'package:encointer_wallet/service/log/log_service.dart';
-import 'package:encointer_wallet/service/substrate_api/api.dart';
-import 'package:encointer_wallet/service/substrate_api/core/dart_api.dart';
-import 'package:encointer_wallet/service/substrate_api/core/js_api.dart';
 import 'package:encointer_wallet/common/components/logo/encointer_logo.dart';
 import 'package:encointer_wallet/store/app.dart';
 
@@ -61,19 +55,3 @@ class _SplashViewState extends State<SplashView> {
     );
   }
 }
-
-/// Initialize an the webApi instance.
-///
-/// Currently, `store.init()` must be called before it is passed into the api
-/// due to some cyclic dependencies between webApi <> AppStore.
-Future<void> initWebApi(BuildContext context, AppStore store) async {
-  final js = await DefaultAssetBundle.of(context).loadString(Assets.jsServiceEncointer.dist.main);
-  final ewHttp = RepositoryProvider.of<EwHttp>(context);
-  final appConfig = RepositoryProvider.of<AppConfig>(context);
-  webApi = Api.create(store, JSApi(), SubstrateDartApi(), ewHttp, js, isIntegrationTest: appConfig.isIntegrationTest);
-
-  await webApi.init().timeout(
-        const Duration(seconds: 20),
-        onTimeout: () => Log.d('webApi.init() has run into a timeout. We might be offline.'),
-      );
-}

app/lib/page/page.dart

@@ -0,0 +1,5 @@
+///TODO(Azamat): Add other exports here
+export 'assets/index.dart';
+export 'profile/contacts/contacts_page.dart';
+export 'profile/index.dart';
+export 'qr_scan/qr_scan_page.dart';

app/lib/presentation/home/store/home_page_store.dart

@@ -0,0 +1,98 @@
+import 'package:flutter/cupertino.dart';
+import 'package:ew_http/ew_http.dart';
+import 'package:mobx/mobx.dart';
+import 'package:provider/provider.dart';
+import 'package:timezone/timezone.dart' as tz;
+
+import 'package:encointer_wallet/service/service.dart';
+import 'package:encointer_wallet/config.dart';
+import 'package:encointer_wallet/modules/settings/logic/app_settings_store.dart';
+import 'package:encointer_wallet/store/app.dart';
+import 'package:encointer_wallet/utils/utils.dart';
+
+part 'home_page_store.g.dart';
+
+const _logTarget = 'HomePageStore';
+// ignore: library_private_types_in_public_api
+class HomePageStore = _HomePageStoreBase with _$HomePageStore;
+
+abstract class _HomePageStoreBase with Store, WidgetsBindingObserver {
+  _HomePageStoreBase(this.appStore, this.buildContext) {
+    _init();
+  }
+
+  @observable
+  late AppStore appStore;
+
+  @observable
+  late BuildContext buildContext;
+
+  @action
+  void _init() {
+    Log.d(_logTarget, '_init');
+    WidgetsBinding.instance.addObserver(this);
+    if (!RepositoryProvider.of<AppConfig>(buildContext).isIntegrationTest) NotificationPlugin.init(buildContext);
+  }
+
+  @action
+  Future<void> postFrameCallbacks() async {
+    Log.d(_logTarget, 'postFrameCallbacks');
+    final encointer = buildContext.read<AppStore>().encointer;
+    final cid = encointer.community?.cid.toFmtString();
+    await initialDeepLinks(buildContext);
+    await NotificationHandler.fetchMessagesAndScheduleNotifications(
+      tz.local,
+      NotificationPlugin.scheduleNotification,
+      langCode: Localizations.localeOf(buildContext).languageCode,
+      cid: cid,
+      ewHttp: RepositoryProvider.of<EwHttp>(buildContext),
+      devMode: buildContext.read<AppSettings>().developerMode,
+    );
+
+    // Should never be null, we either come from the splash screen, and hence we had
+    // enough time to connect to the blockchain or we already have a populated store.
+    //
+    // Hence, can only be null if someone uses the app for the first time and is offline.
+    if (encointer.nextRegisteringPhaseStart != null &&
+        encointer.currentCeremonyIndex != null &&
+        encointer.ceremonyCycleDuration != null) {
+      await CeremonyNotifications.scheduleRegisteringStartsReminders(
+        encointer.nextRegisteringPhaseStart!,
+        encointer.currentCeremonyIndex!,
+        encointer.ceremonyCycleDuration!,
+        I18n.of(buildContext)!.translationsForLocale().encointer,
+        cid: cid,
+      );
+
+      await CeremonyNotifications.scheduleLastDayOfRegisteringReminders(
+        encointer.assigningPhaseStart!,
+        encointer.currentCeremonyIndex!,
+        encointer.ceremonyCycleDuration!,
+        I18n.of(buildContext)!.translationsForLocale().encointer,
+        cid: cid,
+      );
+    }
+  }
+
+  @action
+  @override
+  Future<void> didChangeAppLifecycleState(AppLifecycleState state) async {
+    Log.d(_logTarget, 'Change lifecycle to $state');
+
+    if (state == AppLifecycleState.resumed) {
+      final connected = await webApi.isConnected();
+      Log.d(_logTarget, 'webApi.isConnected() = $connected');
+      if (!connected) {
+        /// initialize webApi again if it's failed after
+        /// user closes the app and reopens it
+        await initWebApi(buildContext, appStore);
+      }
+    }
+    super.didChangeAppLifecycleState(state);
+  }
+
+  @action
+  void dispose() {
+    WidgetsBinding.instance.removeObserver(this);
+  }
+}