neon: Show suggestion to install NextPush if supported

packages/neon/integration_test/screenshot_test.dart

@@ -132,6 +132,11 @@ Future pumpAppPage(
     sharedPreferences,
     disabled: true,
   );
+  final nextPushBloc = NextPushBloc(
+    accountsBloc,
+    globalOptions,
+    disabled: true,
+  );
 
   // ignore: close_sinks
   final userThemeStream = BehaviorSubject<NextcloudTheme?>();
@@ -163,6 +168,9 @@ Future pumpAppPage(
         Provider<FirstLaunchBloc>(
           create: (final _) => firstLaunchBloc,
         ),
+        Provider<NextPushBloc>(
+          create: (final _) => nextPushBloc,
+        ),
         Provider<List<AppImplementation>>(
           create: (final _) => allAppImplementations,
         ),

packages/neon/lib/l10n/en.arb

@@ -51,6 +51,10 @@
   "showSlashHide": "Show/Hide",
   "exit": "Exit",
   "disabled": "Disabled",
+  "firstLaunchGoToSettingsToEnablePushNotifications": "Go to the settings to enable push notifications",
+  "nextPushSupported": "NextPush is supported!",
+  "nextPushSupportedText": "NextPush is a FOSS way of receiving push notifications using the UnifiedPush protocol via a Nextcloud instance.\nYou can install NextPush from the F-Droid app store.",
+  "nextPushSupportedInstall": "Install NextPush",
   "settings": "Settings",
   "settingsApps": "Apps",
   "settingsExport": "Export settings",
@@ -65,7 +69,6 @@
       }
     }
   },
-  "settingsGoToSettingsToEnablePushNotifications": "Go to the settings to enable push notifications",
   "optionsCategoryGeneral": "General",
   "optionsCategoryTheme": "Theme",
   "optionsCategoryPushNotifications": "Push notifications",

packages/neon/lib/l10n/localizations.dart

@@ -269,6 +269,30 @@ abstract class AppLocalizations {
   /// **'Disabled'**
   String get disabled;
 
+  /// No description provided for @firstLaunchGoToSettingsToEnablePushNotifications.
+  ///
+  /// In en, this message translates to:
+  /// **'Go to the settings to enable push notifications'**
+  String get firstLaunchGoToSettingsToEnablePushNotifications;
+
+  /// No description provided for @nextPushSupported.
+  ///
+  /// In en, this message translates to:
+  /// **'NextPush is supported!'**
+  String get nextPushSupported;
+
+  /// No description provided for @nextPushSupportedText.
+  ///
+  /// In en, this message translates to:
+  /// **'NextPush is a FOSS way of receiving push notifications using the UnifiedPush protocol via a Nextcloud instance.\nYou can install NextPush from the F-Droid app store.'**
+  String get nextPushSupportedText;
+
+  /// No description provided for @nextPushSupportedInstall.
+  ///
+  /// In en, this message translates to:
+  /// **'Install NextPush'**
+  String get nextPushSupportedInstall;
+
   /// No description provided for @settings.
   ///
   /// In en, this message translates to:
@@ -311,12 +335,6 @@ abstract class AppLocalizations {
   /// **'Do you want to reset all settings for {name}?'**
   String settingsResetForConfirmation(String name);
 
-  /// No description provided for @settingsGoToSettingsToEnablePushNotifications.
-  ///
-  /// In en, this message translates to:
-  /// **'Go to the settings to enable push notifications'**
-  String get settingsGoToSettingsToEnablePushNotifications;
-
   /// No description provided for @optionsCategoryGeneral.
   ///
   /// In en, this message translates to:

packages/neon/lib/l10n/localizations_en.dart

@@ -103,6 +103,19 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get disabled => 'Disabled';
 
+  @override
+  String get firstLaunchGoToSettingsToEnablePushNotifications => 'Go to the settings to enable push notifications';
+
+  @override
+  String get nextPushSupported => 'NextPush is supported!';
+
+  @override
+  String get nextPushSupportedText =>
+      'NextPush is a FOSS way of receiving push notifications using the UnifiedPush protocol via a Nextcloud instance.\nYou can install NextPush from the F-Droid app store.';
+
+  @override
+  String get nextPushSupportedInstall => 'Install NextPush';
+
   @override
   String get settings => 'Settings';
 
@@ -126,9 +139,6 @@ class AppLocalizationsEn extends AppLocalizations {
     return 'Do you want to reset all settings for $name?';
   }
 
-  @override
-  String get settingsGoToSettingsToEnablePushNotifications => 'Go to the settings to enable push notifications';
-
   @override
   String get optionsCategoryGeneral => 'General';
 

packages/neon/lib/main.dart

@@ -55,6 +55,7 @@ Future main() async {
     platform,
   );
   final firstLaunchBloc = FirstLaunchBloc(sharedPreferences);
+  final nextPushBloc = NextPushBloc(accountsBloc, globalOptions);
 
   runApp(
     MultiProvider(
@@ -83,6 +84,9 @@ Future main() async {
         Provider<FirstLaunchBloc>(
           create: (final _) => firstLaunchBloc,
         ),
+        Provider<NextPushBloc>(
+          create: (final _) => nextPushBloc,
+        ),
         Provider<List<AppImplementation>>(
           create: (final _) => allAppImplementations,
         ),

packages/neon/lib/src/blocs/next_push.dart

@@ -0,0 +1,77 @@
+part of '../neon.dart';
+
+abstract class NextPushBlocEvents {}
+
+abstract class NextPushBlocStates {
+  BehaviorSubject get onNextPushSupported;
+}
+
+class NextPushBloc extends Bloc implements NextPushBlocEvents, NextPushBlocStates {
+  NextPushBloc(
+    this._accountsBloc,
+    this._globalOptions, {
+    final bool disabled = false,
+  }) {
+    if (disabled) {
+      return;
+    }
+    Rx.merge([
+      _globalOptions.pushNotificationsEnabled.stream,
+      _globalOptions.pushNotificationsDistributor.stream,
+      _globalOptions.pushNotificationsDistributor.values,
+      _accountsBloc.accounts,
+    ]).debounceTime(const Duration(milliseconds: 100)).listen((final _) async {
+      if (!_globalOptions.pushNotificationsEnabled.enabled.hasValue ||
+          !_globalOptions.pushNotificationsEnabled.enabled.value ||
+          !_globalOptions.pushNotificationsEnabled.hasValue ||
+          !_globalOptions.pushNotificationsEnabled.value) {
+        return;
+      }
+      if (_globalOptions.pushNotificationsDistributor.value != null) {
+        return;
+      }
+      if (_globalOptions.pushNotificationsDistributor.values.value.containsKey(unifiedPushNextPushID)) {
+        // NextPush is already installed
+        return;
+      }
+
+      var supported = false;
+      for (final account in _accountsBloc.accounts.value) {
+        if (!_supported.containsKey(account)) {
+          try {
+            _supported[account] = (await account.client.unifiedPushProvider.check()).success;
+          } catch (e, s) {
+            debugPrint(e.toString());
+            debugPrint(s.toString());
+            _supported[account] = false;
+          }
+        }
+        if (_supported[account]!) {
+          supported = true;
+          break;
+        }
+      }
+
+      if (!supported) {
+        return;
+      }
+
+      if (onNextPushSupported.hasValue) {
+        return;
+      }
+      onNextPushSupported.add(null);
+    });
+  }
+
+  final AccountsBloc _accountsBloc;
+  final GlobalOptions _globalOptions;
+  final _supported = <Account, bool>{};
+
+  @override
+  void dispose() {
+    unawaited(onNextPushSupported.close());
+  }
+
+  @override
+  BehaviorSubject onNextPushSupported = BehaviorSubject();
+}

packages/neon/lib/src/neon.dart

@@ -52,6 +52,7 @@ part 'blocs/apps.dart';
 part 'blocs/capabilities.dart';
 part 'blocs/first_launch.dart';
 part 'blocs/login.dart';
+part 'blocs/next_push.dart';
 part 'blocs/push_notifications.dart';
 part 'blocs/user_details.dart';
 part 'blocs/user_status.dart';

packages/neon/lib/src/pages/home.dart

@@ -25,6 +25,7 @@ class _HomePageState extends State<HomePage> {
   late AppsBloc _appsBloc;
   late CapabilitiesBloc _capabilitiesBloc;
   late FirstLaunchBloc _firstLaunchBloc;
+  late NextPushBloc _nextPushBloc;
 
   @override
   void initState() {
@@ -35,6 +36,7 @@ class _HomePageState extends State<HomePage> {
     _appsBloc = _accountsBloc.getAppsBloc(widget.account);
     _capabilitiesBloc = _accountsBloc.getCapabilitiesBloc(widget.account);
     _firstLaunchBloc = Provider.of<FirstLaunchBloc>(context, listen: false);
+    _nextPushBloc = Provider.of<NextPushBloc>(context, listen: false);
 
     _appsBloc.openNotifications.listen((final _) async {
       final notificationsAppImplementation = _appsBloc.notificationsAppImplementation.valueOrNull;
@@ -101,7 +103,7 @@ class _HomePageState extends State<HomePage> {
     _firstLaunchBloc.onFirstLaunch.listen((final _) {
       ScaffoldMessenger.of(context).showSnackBar(
         SnackBar(
-          content: Text(AppLocalizations.of(context).settingsGoToSettingsToEnablePushNotifications),
+          content: Text(AppLocalizations.of(context).firstLaunchGoToSettingsToEnablePushNotifications),
           action: SnackBarAction(
             label: AppLocalizations.of(context).settings,
             onPressed: () async {
@@ -116,6 +118,34 @@ class _HomePageState extends State<HomePage> {
       );
     });
 
+    _nextPushBloc.onNextPushSupported.listen((final _) async {
+      await showDialog(
+        context: context,
+        builder: (final context) => AlertDialog(
+          title: Text(AppLocalizations.of(context).nextPushSupported),
+          content: Text(AppLocalizations.of(context).nextPushSupportedText),
+          actions: [
+            OutlinedButton(
+              onPressed: () {
+                Navigator.of(context).pop();
+              },
+              child: Text(AppLocalizations.of(context).no),
+            ),
+            ElevatedButton(
+              onPressed: () {
+                Navigator.of(context).pop();
+                launchUrlString(
+                  'https://f-droid.org/packages/$unifiedPushNextPushID',
+                  mode: LaunchMode.externalApplication,
+                );
+              },
+              child: Text(AppLocalizations.of(context).nextPushSupportedInstall),
+            ),
+          ],
+        ),
+      );
+    });
+
     unawaited(_checkMaintenanceMode());
   }
 

packages/neon/lib/src/utils/global_options.dart

@@ -1,5 +1,7 @@
 part of '../neon.dart';
 
+const unifiedPushNextPushID = 'org.unifiedpush.distributor.nextpush';
+
 class GlobalOptions {
   GlobalOptions(
     this._storage,
@@ -63,7 +65,7 @@ class GlobalOptions {
     'io.heckel.ntfy': (final context) => AppLocalizations.of(context).globalOptionsPushNotificationsDistributorNtfy,
     'org.unifiedpush.distributor.fcm': (final context) =>
         AppLocalizations.of(context).globalOptionsPushNotificationsDistributorFCMUP,
-    'org.unifiedpush.distributor.nextpush': (final context) =>
+    unifiedPushNextPushID: (final context) =>
         AppLocalizations.of(context).globalOptionsPushNotificationsDistributorNextPush,
     'org.unifiedpush.distributor.noprovider2push': (final context) =>
         AppLocalizations.of(context).globalOptionsPushNotificationsDistributorNoProvider2Push,