neon,neon_files,neon_news,neon_notes,neon_notifications: Use Result helper methods

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

@@ -34,17 +34,17 @@ class AppsBloc extends InteractiveBloc implements AppsBlocEvents, AppsBlocStates
     });
 
     appImplementations.listen((final result) {
-      if (result.data != null) {
+      if (result.hasData) {
         final options = _accountsBloc.getOptionsFor(_account);
         unawaited(
           options.initialApp.stream.first.then((var initialApp) async {
             if (initialApp == null) {
-              if (result.data!.find('files') != null) {
+              if (result.requireData.find('files') != null) {
                 initialApp = 'files';
-              } else if (result.data!.isNotEmpty) {
+              } else if (result.requireData.isNotEmpty) {
                 // This should never happen, because the files app is always installed and can not be removed, but just in
                 // case this changes at a later point.
-                initialApp = result.data!.first.id;
+                initialApp = result.requireData.first.id;
               }
             }
             if (!activeAppID.hasValue) {
@@ -176,7 +176,8 @@ class AppsBloc extends InteractiveBloc implements AppsBlocEvents, AppsBlocStates
 
   @override
   Future setActiveApp(final String? appID) async {
-    if (appID != null && (await appImplementations.firstWhere((final a) => a.data != null)).data!.find(appID) != null) {
+    if (appID != null &&
+        (await appImplementations.firstWhere((final a) => a.hasData)).requireData.find(appID) != null) {
       if (activeAppID.valueOrNull != appID) {
         activeAppID.add(appID);
       }

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

@@ -71,9 +71,9 @@ class AccountSettingsPage extends StatelessWidget {
                     title: Column(
                       crossAxisAlignment: CrossAxisAlignment.start,
                       children: [
-                        if (userDetails.data != null) ...[
+                        if (userDetails.hasData) ...[
                           LinearProgressIndicator(
-                            value: userDetails.data!.quota.relative / 100,
+                            value: userDetails.requireData.quota.relative / 100,
                             backgroundColor: Theme.of(context).colorScheme.primary.withOpacity(0.3),
                           ),
                           const SizedBox(
@@ -81,9 +81,9 @@ class AccountSettingsPage extends StatelessWidget {
                           ),
                           Text(
                             AppLocalizations.of(context).accountOptionsQuotaUsedOf(
-                              filesize(userDetails.data!.quota.used, 1),
-                              filesize(userDetails.data!.quota.total, 1),
-                              userDetails.data!.quota.relative.toString(),
+                              filesize(userDetails.requireData.quota.used, 1),
+                              filesize(userDetails.requireData.quota.total, 1),
+                              userDetails.requireData.quota.relative.toString(),
                             ),
                           ),
                         ],

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

@@ -109,8 +109,8 @@ class _HomePageState extends State<HomePage> {
               Widget body = Builder(
                 builder: (final context) => Column(
                   children: [
-                    if (appImplementations.data != null) ...[
-                      if (appImplementations.data!.isEmpty) ...[
+                    if (appImplementations.hasData) ...[
+                      if (appImplementations.requireData.isEmpty) ...[
                         Expanded(
                           child: Center(
                             child: Text(

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

@@ -137,7 +137,7 @@ class _LoginPageState extends State<LoginPage> {
                           },
                         ),
                         actions: [
-                          if (serverConnectionStateSnapshot.data != null) ...[
+                          if (serverConnectionStateSnapshot.hasData) ...[
                             IconButton(
                               onPressed: _loginBloc.refresh,
                               tooltip: AppLocalizations.of(context).loginRestart,

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

@@ -51,7 +51,7 @@ class _SettingsPageState extends State<SettingsPage> {
             appImplementations: appImplementations,
             accountSpecificOptions: {
               if (accountsSnapshot.hasData) ...{
-                for (final account in accountsSnapshot.data!) ...{
+                for (final account in accountsSnapshot.requireData) ...{
                   account: accountsBloc.getOptionsFor(account).options,
                 },
               },
@@ -114,8 +114,8 @@ class _SettingsPageState extends State<SettingsPage> {
                     SettingsCategory(
                       title: Text(AppLocalizations.of(context).optionsCategoryPushNotifications),
                       tiles: [
-                        if (pushNotificationsEnabledEnabledSnapshot.data != null &&
-                            !pushNotificationsEnabledEnabledSnapshot.data!) ...[
+                        if (pushNotificationsEnabledEnabledSnapshot.hasData &&
+                            !pushNotificationsEnabledEnabledSnapshot.requireData) ...[
                           NeonTextSettingsTile(
                             text: AppLocalizations.of(context).globalOptionsPushNotificationsEnabledDisabledNotice,
                             style: const TextStyle(
@@ -164,7 +164,7 @@ class _SettingsPageState extends State<SettingsPage> {
                     SettingsCategory(
                       title: Text(AppLocalizations.of(context).optionsCategoryAccounts),
                       tiles: [
-                        if (accountsSnapshot.data!.length > 1) ...[
+                        if (accountsSnapshot.requireData.length > 1) ...[
                           CheckBoxSettingsTile(
                             option: globalOptions.rememberLastUsedAccount,
                           ),
@@ -172,7 +172,7 @@ class _SettingsPageState extends State<SettingsPage> {
                             option: globalOptions.initialAccount,
                           ),
                         ],
-                        for (final account in accountsSnapshot.data!) ...[
+                        for (final account in accountsSnapshot.requireData) ...[
                           NeonAccountSettingsTile(
                             account: account,
                             onTap: () {

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

@@ -6,10 +6,10 @@ class AccountSpecificOptions {
     this._appsBloc,
   ) {
     _appsBloc.appImplementations.listen((final result) {
-      if (result.data != null) {
+      if (result.hasData) {
         _appIDsSubject.add({
           null: (final context) => AppLocalizations.of(context).accountOptionsAutomatic,
-          for (final app in result.data!) ...{
+          for (final app in result.requireData) ...{
             app.id: app.name,
           },
         });

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

@@ -63,7 +63,7 @@ class RequestManager {
     final bool emitEmptyCache,
     final int retries,
   ) async {
-    if (subject.valueOrNull?.data != null) {
+    if (subject.valueOrNull?.hasData ?? false) {
       subject.add(
         Result(
           subject.value.data,

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

@@ -36,7 +36,7 @@ class Result<T> {
   final bool isCached;
 
   Result<R> transform<R>(final R? Function(T data) call) => Result(
-        data != null ? call(data as T) : null,
+        hasData ? call(data as T) : null,
         error,
         isLoading: isLoading,
         isCached: isCached,

packages/neon/neon/lib/src/widgets/account_tile.dart

@@ -40,10 +40,10 @@ class NeonAccountTile extends StatelessWidget {
         stream: userDetailsBloc.userDetails,
         builder: (final context, final userDetails) => Row(
           children: [
-            if (userDetails.data != null) ...[
+            if (userDetails.hasData) ...[
               Flexible(
                 child: Text(
-                  userDetails.data!.displayname,
+                  userDetails.requireData.displayname,
                   style: Theme.of(context).textTheme.bodyLarge!.copyWith(
                         color: textColor,
                       ),

packages/neon/neon/lib/src/widgets/cached_image.dart

@@ -35,7 +35,7 @@ class _NeonCachedImageState extends State<NeonCachedImage> {
           future: future,
           builder: (final context, final fileSnapshot) {
             if (fileSnapshot.hasData) {
-              final content = fileSnapshot.data!.readAsBytesSync();
+              final content = fileSnapshot.requireData.readAsBytesSync();
 
               try {
                 // TODO: Is this safe enough?

packages/neon/neon/lib/src/widgets/drawer_destination.dart

@@ -35,7 +35,7 @@ extension NavigationRailDestinationExtension on NavigationRailDestination {
       builder: (final context, final snapshot) {
         final colorScheme = Theme.of(context).colorScheme;
 
-        final color = snapshot.data! > 0 ? colorScheme.primary : colorScheme.onBackground;
+        final color = snapshot.requireData > 0 ? colorScheme.primary : colorScheme.onBackground;
         const size = Size.square(kAvatarSize * 2 / 3);
 
         final icon = Container(
@@ -43,7 +43,7 @@ extension NavigationRailDestinationExtension on NavigationRailDestination {
           child: neonDestination.icon(size: size, color: color),
         );
 
-        if (snapshot.data! <= 0) {
+        if (snapshot.requireData <= 0) {
           return icon;
         }
 
@@ -55,7 +55,7 @@ extension NavigationRailDestinationExtension on NavigationRailDestination {
             );
 
             return Text(
-              snapshot.data!.toString(),
+              snapshot.requireData.toString(),
               style: style,
             );
           },
@@ -87,7 +87,7 @@ extension NavigationDrawerDestinationExtension on NavigationDrawerDestination {
       builder: (final context, final snapshot) {
         final label = Text(neonDestination.label);
 
-        if (snapshot.data! <= 0) {
+        if (snapshot.requireData <= 0) {
           return label;
         }
 
@@ -102,7 +102,7 @@ extension NavigationDrawerDestinationExtension on NavigationDrawerDestination {
               );
 
               return Text(
-                snapshot.data!.toString(),
+                snapshot.requireData.toString(),
                 style: style,
               );
             },

packages/neon/neon/lib/src/widgets/user_avatar.dart

@@ -107,7 +107,7 @@ class _UserAvatarState extends State<NeonUserAvatar> {
           fontSize: 16,
         ),
       );
-    } else if (result.data != null) {
+    } else if (result.hasData) {
       decoration = BoxDecoration(
         shape: BoxShape.circle,
         color: _userStatusToColor(result.data!.status),

packages/neon/neon_files/lib/dialogs/choose_folder.dart

@@ -44,7 +44,7 @@ class FilesChooseFolderDialog extends StatelessWidget {
                                   builder: (final context) => const FilesCreateFolderDialog(),
                                 );
                                 if (result != null) {
-                                  bloc.createFolder([...pathSnapshot.data!, ...result]);
+                                  bloc.createFolder([...pathSnapshot.requireData, ...result]);
                                 }
                               },
                               child: Text(AppLocalizations.of(context).folderCreate),

packages/neon/neon_files/lib/widgets/browser_view.dart

@@ -46,7 +46,7 @@ class _FilesBrowserViewState extends State<FilesBrowserView> {
                   ? Container()
                   : BackButtonListener(
                       onBackButtonPressed: () async {
-                        final path = pathSnapshot.data!;
+                        final path = pathSnapshot.requireData;
                         if (path.isNotEmpty) {
                           widget.bloc.setPath(path.sublist(0, path.length - 1));
                           return true;
@@ -59,12 +59,12 @@ class _FilesBrowserViewState extends State<FilesBrowserView> {
                         sortBoxOrderOption: widget.bloc.options.filesSortBoxOrderOption,
                         input: files.data,
                         builder: (final context, final sorted) => NeonListView<Widget>(
-                          scrollKey: 'files-${pathSnapshot.data!.join('/')}',
+                          scrollKey: 'files-${pathSnapshot.requireData.join('/')}',
                           withFloatingActionButton: true,
                           items: [
                             for (final uploadTask in sorted == null
                                 ? <UploadTask>[]
-                                : uploadTasksSnapshot.data!.where(
+                                : uploadTasksSnapshot.requireData.where(
                                     (final task) =>
                                         sorted.where((final file) => _pathMatchesFile(task.path, file.name)).isEmpty,
                                   )) ...[
@@ -95,9 +95,9 @@ class _FilesBrowserViewState extends State<FilesBrowserView> {
                                 if (!widget.onlyShowDirectories || file.isDirectory) ...[
                                   Builder(
                                     builder: (final context) {
-                                      final matchingUploadTasks = uploadTasksSnapshot.data!
+                                      final matchingUploadTasks = uploadTasksSnapshot.requireData
                                           .where((final task) => _pathMatchesFile(task.path, file.name));
-                                      final matchingDownloadTasks = downloadTasksSnapshot.data!
+                                      final matchingDownloadTasks = downloadTasksSnapshot.requireData
                                           .where((final task) => _pathMatchesFile(task.path, file.name));
 
                                       return StreamBuilder<int?>(
@@ -165,10 +165,10 @@ class _FilesBrowserViewState extends State<FilesBrowserView> {
                                         widget.bloc.setPath([]);
                                       },
                                     ),
-                                    for (var i = 0; i < pathSnapshot.data!.length; i++) ...[
+                                    for (var i = 0; i < pathSnapshot.requireData.length; i++) ...[
                                       Builder(
                                         builder: (final context) {
-                                          final path = pathSnapshot.data!.sublist(0, i + 1);
+                                          final path = pathSnapshot.requireData.sublist(0, i + 1);
                                           return Tooltip(
                                             message: AppLocalizations.of(context).goToPath(path.join('/')),
                                             excludeFromSemantics: true,
@@ -177,7 +177,7 @@ class _FilesBrowserViewState extends State<FilesBrowserView> {
                                                 widget.bloc.setPath(path);
                                               },
                                               child: Text(
-                                                pathSnapshot.data![i],
+                                                pathSnapshot.requireData[i],
                                                 semanticsLabel: AppLocalizations.of(context).goToPath(path.join('/')),
                                               ),
                                             ),

packages/neon/neon_news/lib/blocs/news.dart

@@ -35,9 +35,10 @@ class NewsBloc extends InteractiveBloc implements NewsBlocEvents, NewsBlocStates
     this.client,
   ) {
     mainArticlesBloc.articles.listen((final result) {
-      if (result.data != null) {
+      if (result.hasData) {
         final type = mainArticlesBloc.filterType.valueOrNull;
-        unreadCounter.add(result.data!.where((final a) => type == FilterType.starred ? a.starred : a.unread).length);
+        unreadCounter
+            .add(result.requireData.where((final a) => type == FilterType.starred ? a.starred : a.unread).length);
       }
     });
 

packages/neon/neon_news/lib/dialogs/add_feed.dart

@@ -77,9 +77,9 @@ class _NewsAddFeedDialogState extends State<NewsAddFeedDialog> {
                         visible: folders.isLoading,
                       ),
                     ),
-                    if (folders.data != null) ...[
+                    if (folders.hasData) ...[
                       NewsFolderSelect(
-                        folders: folders.data!,
+                        folders: folders.requireData,
                         value: folder,
                         onChanged: (final f) {
                           setState(() {
@@ -90,7 +90,7 @@ class _NewsAddFeedDialogState extends State<NewsAddFeedDialog> {
                     ],
                   ],
                   ElevatedButton(
-                    onPressed: folders.data != null ? submit : null,
+                    onPressed: folders.hasData ? submit : null,
                     child: Text(AppLocalizations.of(context).feedAdd),
                   ),
                 ],

packages/neon/neon_news/lib/widgets/articles_view.dart

@@ -36,7 +36,7 @@ class _NewsArticlesViewState extends State<NewsArticlesView> {
             input: articles.data,
             builder: (final context, final sorted) => NeonListView<NextcloudNewsArticle>(
               scrollKey: 'news-articles',
-              items: feeds.data == null ? null : sorted,
+              items: feeds.hasData ? sorted : null,
               isLoading: articles.isLoading || feeds.isLoading,
               error: articles.error ?? feeds.error,
               onRefresh: () async {
@@ -48,7 +48,7 @@ class _NewsArticlesViewState extends State<NewsArticlesView> {
               builder: (final context, final article) => _buildArticle(
                 context,
                 article,
-                feeds.data!.singleWhere((final feed) => feed.id == article.feedId),
+                feeds.requireData.singleWhere((final feed) => feed.id == article.feedId),
               ),
               topFixedChildren: [
                 StreamBuilder<FilterType>(

packages/neon/neon_news/lib/widgets/feeds_view.dart

@@ -19,9 +19,9 @@ class NewsFeedsView extends StatelessWidget {
             sortBox: feedsSortBox,
             sortPropertyOption: bloc.options.feedsSortPropertyOption,
             sortBoxOrderOption: bloc.options.feedsSortBoxOrderOption,
-            input: folders.data == null
-                ? null
-                : feeds.data?.where((final f) => folderID == null || f.folderId == folderID).toList(),
+            input: folders.hasData
+                ? feeds.data?.where((final f) => folderID == null || f.folderId == folderID).toList()
+                : null,
             builder: (final context, final sorted) => NeonListView<NextcloudNewsFeed>(
               scrollKey: 'news-feeds',
               withFloatingActionButton: true,
@@ -32,7 +32,7 @@ class NewsFeedsView extends StatelessWidget {
               builder: (final context, final feed) => _buildFeed(
                 context,
                 feed,
-                folders.data!,
+                folders.requireData,
               ),
             ),
           ),

packages/neon/neon_news/lib/widgets/folders_view.dart

@@ -17,15 +17,15 @@ class NewsFoldersView extends StatelessWidget {
             sortBox: foldersSortBox,
             sortPropertyOption: bloc.options.foldersSortPropertyOption,
             sortBoxOrderOption: bloc.options.foldersSortBoxOrderOption,
-            input: feeds.data == null
-                ? null
-                : folders.data?.map((final folder) {
-                    final feedsInFolder = feeds.data!.where((final feed) => feed.folderId == folder.id);
+            input: feeds.hasData
+                ? folders.data?.map((final folder) {
+                    final feedsInFolder = feeds.requireData.where((final feed) => feed.folderId == folder.id);
                     final feedCount = feedsInFolder.length;
                     final unreadCount = feedsInFolder.fold(0, (final a, final b) => a + b.unreadCount!);
 
                     return (folder, feedCount, unreadCount);
-                  }).toList(),
+                  }).toList()
+                : null,
             builder: (final context, final sorted) => NeonListView<FolderFeedsWrapper>(
               scrollKey: 'news-folders',
               withFloatingActionButton: true,

packages/neon/neon_notes/lib/dialogs/create_note.dart

@@ -59,9 +59,9 @@ class _NotesCreateNoteDialogState extends State<NotesCreateNoteDialog> {
                         visible: notes.isLoading,
                       ),
                     ),
-                    if (notes.data != null) ...[
+                    if (notes.hasData) ...[
                       NotesCategorySelect(
-                        categories: notes.data!.map((final note) => note.category).toSet().toList(),
+                        categories: notes.requireData.map((final note) => note.category).toSet().toList(),
                         onChanged: (final category) {
                           selectedCategory = category;
                         },

packages/neon/neon_notes/lib/dialogs/select_category.dart

@@ -47,9 +47,9 @@ class _NotesSelectCategoryDialogState extends State<NotesSelectCategoryDialog> {
                       visible: notes.isLoading,
                     ),
                   ),
-                  if (notes.data != null) ...[
+                  if (notes.hasData) ...[
                     NotesCategorySelect(
-                      categories: notes.data!.map((final note) => note.category).toSet().toList(),
+                      categories: notes.requireData.map((final note) => note.category).toSet().toList(),
                       initialValue: widget.initialCategory,
                       onChanged: (final category) {
                         selectedCategory = category;

packages/neon/neon_notes/lib/widgets/categories_view.dart

@@ -21,7 +21,7 @@ class NotesCategoriesView extends StatelessWidget {
               .map(
                 (final category) => NoteCategory(
                   category,
-                  notes.data!.where((final note) => note.category == category).length,
+                  notes.requireData.where((final note) => note.category == category).length,
                 ),
               )
               .toList(),

packages/neon/neon_notifications/lib/blocs/notifications.dart

@@ -20,8 +20,8 @@ class NotificationsBloc extends InteractiveBloc
     this._client,
   ) {
     notifications.listen((final result) {
-      if (result.data != null) {
-        unreadCounter.add(result.data!.length);
+      if (result.hasData) {
+        unreadCounter.add(result.requireData.length);
       }
     });