neon,neon_notifications: Cleanup finding app implementation

packages/neon/neon/lib/src/app.dart

@@ -171,22 +171,18 @@ class _NeonAppState extends State<NeonApp> with WidgetsBindingObserver, tray.Tra
           if (account == null) {
             return;
           }
-          final appImplementation = Provider.of<List<AppImplementation>>(context, listen: false)
+          final app = Provider.of<List<AppImplementation>>(context, listen: false).find('notifications');
-              .singleWhere((final a) => a.id == 'notifications');
+          if (app != null) {
-          await _accountsBloc.getAppsBloc(account).getAppBloc<NotificationsBlocInterface>(appImplementation).refresh();
+            await _accountsBloc.getAppsBloc(account).getAppBloc<NotificationsBlocInterface>(app).refresh();
+          }
         };
         Global.onPushNotificationClicked = (final pushNotificationWithAccountID) async {
           final allAppImplementations = Provider.of<List<AppImplementation>>(context, listen: false);
 
-          final matchingAppImplementations =
+          final app = (pushNotificationWithAccountID.subject.app != null
-              allAppImplementations.where((final a) => a.id == pushNotificationWithAccountID.subject.app);
+                  ? allAppImplementations.find(pushNotificationWithAccountID.subject.app!)
-
+                  : null) ??
-          late AppImplementation appImplementation;
+              allAppImplementations.find('notifications');
-          if (matchingAppImplementations.isNotEmpty) {
-            appImplementation = matchingAppImplementations.single;
-          } else {
-            appImplementation = allAppImplementations.singleWhere((final a) => a.id == 'notifications');
-          }
 
           final account = _accountsBloc.accounts.value.find(pushNotificationWithAccountID.accountID);
           if (account == null) {
@@ -194,13 +190,15 @@ class _NeonAppState extends State<NeonApp> with WidgetsBindingObserver, tray.Tra
           }
 
           _accountsBloc.setActiveAccount(account);
-          if (appImplementation.id != 'notifications') {
+          if (app != null) {
+            if (app.id != 'notifications') {
               _accountsBloc
                   .getAppsBloc(account)
-                .getAppBloc<NotificationsBlocInterface>(appImplementation)
+                  .getAppBloc<NotificationsBlocInterface>(app)
                   .deleteNotification(pushNotificationWithAccountID.subject.nid!);
             }
-          await _openAppFromExternal(account, appImplementation.id);
+            await _openAppFromExternal(account, app.id);
+          }
         };
 
         final details = await localNotificationsPlugin.getNotificationAppLaunchDetails();

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

@@ -37,7 +37,7 @@ class AppsBloc extends InteractiveBloc implements AppsBlocEvents, AppsBlocStates
         unawaited(
           options.initialApp.stream.first.then((var initialApp) async {
             if (initialApp == null) {
-              if (result.data!.where((final a) => a.id == 'files').isNotEmpty) {
+              if (result.data!.find('files') != null) {
                 initialApp = 'files';
               } else if (result.data!.isNotEmpty) {
                 // This should never happen, because the files app is always installed and can not be removed, but just in
@@ -126,10 +126,7 @@ class AppsBloc extends InteractiveBloc implements AppsBlocEvents, AppsBlocStates
 
   @override
   Future setActiveApp(final String? appID) async {
-    if ((await appImplementations.firstWhere((final a) => a.data != null))
+    if (appID != null && (await appImplementations.firstWhere((final a) => a.data != null)).data!.find(appID) != null) {
-        .data!
-        .where((final app) => app.id == appID)
-        .isNotEmpty) {
       if (activeAppID.valueOrNull != appID) {
         activeAppID.add(appID);
       }

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

@@ -474,7 +474,7 @@ class _HomePageState extends State<HomePage> {
                                                 Flexible(
                                                   child: Text(
                                                     appImplementations.data!
-                                                        .singleWhere((final a) => a.id == activeAppIDSnapshot.data!)
+                                                        .find(activeAppIDSnapshot.data!)!
                                                         .name(context),
                                                   ),
                                                 ),
@@ -583,7 +583,7 @@ class _HomePageState extends State<HomePage> {
                                                   if (activeAppIDSnapshot.hasData) ...[
                                                     Expanded(
                                                       child: appImplementations.data!
-                                                          .singleWhere((final a) => a.id == activeAppIDSnapshot.data!)
+                                                          .find(activeAppIDSnapshot.data!)!
                                                           .buildPage(context, _appsBloc),
                                                     ),
                                                   ],

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

@@ -46,3 +46,15 @@ abstract class AppImplementation<T extends Bloc, R extends NextcloudAppSpecificO
     options.dispose();
   }
 }
+
+extension AppImplementationFind on List<AppImplementation> {
+  AppImplementation? find(final String appID) {
+    for (final app in this) {
+      if (app.id == appID) {
+        return app;
+      }
+    }
+
+    return null;
+  }
+}

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

@@ -20,13 +20,13 @@ class SettingsExportHelper {
 
     final appImplementationsData = data['apps'] as Map<String, dynamic>;
     for (final appId in appImplementationsData.keys) {
-      final matchingAppImplementations = appImplementations.where((final app) => app.id == appId).toList();
+      final app = appImplementations.find(appId);
-      if (matchingAppImplementations.length != 1) {
+      if (app == null) {
         return;
       }
       final appImplementationData = appImplementationsData[appId]! as Map<String, dynamic>;
       await _applyOptionsMapToOptions(
-        matchingAppImplementations[0].options.options,
+        app.options.options,
         appImplementationData,
       );
     }

packages/neon/neon_notifications/lib/pages/main.dart

@@ -50,9 +50,7 @@ class _NotificationsMainPageState extends State<NotificationsMainPage> {
     final BuildContext context,
     final NextcloudNotificationsNotification notification,
   ) {
-    final matchingAppImplementations = Provider.of<List<AppImplementation>>(context, listen: false)
+    final app = Provider.of<List<AppImplementation>>(context, listen: false).find(notification.app);
-        .where((final a) => a.id == notification.app)
-        .toList();
 
     return ListTile(
       title: Text(notification.subject),
@@ -73,8 +71,8 @@ class _NotificationsMainPageState extends State<NotificationsMainPage> {
           ),
         ],
       ),
-      leading: matchingAppImplementations.isNotEmpty
+      leading: app != null
-          ? matchingAppImplementations.single.buildIcon(
+          ? app.buildIcon(
               context,
               width: 40,
               height: 40,
@@ -93,11 +91,9 @@ class _NotificationsMainPageState extends State<NotificationsMainPage> {
         if (notification.app == 'notifications') {
           return;
         }
-        final allAppImplementations = Provider.of<List<AppImplementation>>(context, listen: false);
+        if (app != null) {
-        final matchingAppImplementations = allAppImplementations.where((final a) => a.id == notification.app);
-        if (matchingAppImplementations.isNotEmpty) {
           final accountsBloc = Provider.of<AccountsBloc>(context, listen: false);
-          await accountsBloc.getAppsBloc(accountsBloc.activeAccount.value!).setActiveApp(notification.app);
+          await accountsBloc.getAppsBloc(accountsBloc.activeAccount.value!).setActiveApp(app.id);
         } else {
           await showDialog(
             context: context,