Refactoring: replace tuple with actual class

lib/bloc/list_album.dart

@@ -8,11 +8,11 @@ import 'package:nc_photos/entity/share.dart';
 import 'package:nc_photos/entity/share/data_source.dart';
 import 'package:nc_photos/event/event.dart';
 import 'package:nc_photos/exception.dart';
+import 'package:nc_photos/exception_event.dart';
 import 'package:nc_photos/remote_storage_util.dart' as remote_storage_util;
 import 'package:nc_photos/string_extension.dart';
 import 'package:nc_photos/throttler.dart';
 import 'package:nc_photos/use_case/list_album.dart';
-import 'package:tuple/tuple.dart';
 
 class ListAlbumBlocItem {
   ListAlbumBlocItem(this.album, this.isSharedByMe, this.isSharedToMe);
@@ -232,15 +232,15 @@ class ListAlbumBloc extends Bloc<ListAlbumBlocEvent, ListAlbumBlocState> {
       final errors = <dynamic>[];
       await for (final result in ListAlbum(
           FileRepo(fileDataSource), AlbumRepo(albumDataSrc))(ev.account)) {
-        if (result is Tuple2) {
+        if (result is ExceptionEvent) {
-          if (result.item1 is CacheNotFoundException) {
+          if (result.error is CacheNotFoundException) {
             _log.info(
-                "[_queryWithAlbumDataSource] Cache not found", result.item1);
+                "[_queryWithAlbumDataSource] Cache not found", result.error);
           } else {
             _log.shout("[_queryWithAlbumDataSource] Exception while ListAlbum",
-                result.item1, result.item2);
+                result.error, result.stackTrace);
           }
-          errors.add(result.item1);
+          errors.add(result.error);
         } else if (result is Album) {
           albums.add(result);
         }

lib/bloc/list_pending_shared_album.dart

@@ -5,6 +5,7 @@ import 'package:nc_photos/entity/album.dart';
 import 'package:nc_photos/entity/file.dart';
 import 'package:nc_photos/entity/file/data_source.dart';
 import 'package:nc_photos/event/event.dart';
+import 'package:nc_photos/exception_event.dart';
 import 'package:nc_photos/remote_storage_util.dart' as remote_storage_util;
 import 'package:nc_photos/use_case/list_pending_shared_album.dart';
 import 'package:tuple/tuple.dart';
@@ -138,10 +139,10 @@ class ListPendingSharedAlbumBloc extends Bloc<
       final errors = <dynamic>[];
       await for (final result
           in ListPendingSharedAlbum(fileRepo, albumRepo)(ev.account)) {
-        if (result is Tuple2) {
+        if (result is ExceptionEvent) {
           _log.severe("[_onEventQuery] Exception while ListPendingSharedAlbum",
-              result.item1, result.item2);
+              result.error, result.stackTrace);
-          errors.add(result.item1);
+          errors.add(result.error);
         } else if (result is Album) {
           albums.add(result);
         }

lib/exception_event.dart

@@ -0,0 +1,9 @@
+class ExceptionEvent {
+  const ExceptionEvent(
+    this.error, [
+    this.stackTrace,
+  ]);
+
+  final dynamic error;
+  final StackTrace? stackTrace;
+}

lib/use_case/list_album.dart

@@ -3,11 +3,11 @@ import 'package:nc_photos/account.dart';
 import 'package:nc_photos/entity/album.dart';
 import 'package:nc_photos/entity/file.dart';
 import 'package:nc_photos/exception.dart';
+import 'package:nc_photos/exception_event.dart';
 import 'package:nc_photos/remote_storage_util.dart' as remote_storage_util;
 import 'package:nc_photos/use_case/compat/v15.dart';
 import 'package:nc_photos/use_case/compat/v25.dart';
 import 'package:nc_photos/use_case/ls.dart';
-import 'package:tuple/tuple.dart';
 
 class ListAlbum {
   ListAlbum(this.fileRepo, this.albumRepo);
@@ -38,12 +38,12 @@ class ListAlbum {
           File(
             path: remote_storage_util.getRemoteAlbumsDir(account),
           ));
-    } catch (e, stacktrace) {
+    } catch (e, stackTrace) {
       if (e is ApiException && e.response.statusCode == 404) {
         // no albums
         return;
       }
-      yield Tuple2(e, stacktrace);
+      yield ExceptionEvent(e, stackTrace);
       return;
     }
     final albumFiles =
@@ -56,8 +56,8 @@ class ListAlbum {
         }
         albumFiles[i] = f;
         yield await albumRepo.get(account, f);
-      } catch (e, stacktrace) {
+      } catch (e, stackTrace) {
-        yield Tuple2(e, stacktrace);
+        yield ExceptionEvent(e, stackTrace);
       }
     }
     try {

lib/use_case/list_pending_shared_album.dart

@@ -3,9 +3,9 @@ import 'package:nc_photos/account.dart';
 import 'package:nc_photos/entity/album.dart';
 import 'package:nc_photos/entity/file.dart';
 import 'package:nc_photos/exception.dart';
+import 'package:nc_photos/exception_event.dart';
 import 'package:nc_photos/remote_storage_util.dart' as remote_storage_util;
 import 'package:nc_photos/use_case/ls.dart';
-import 'package:tuple/tuple.dart';
 
 class ListPendingSharedAlbum {
   ListPendingSharedAlbum(this.fileRepo, this.albumRepo);
@@ -23,12 +23,12 @@ class ListPendingSharedAlbum {
           File(
             path: remote_storage_util.getRemotePendingSharedAlbumsDir(account),
           ));
-    } catch (e, stacktrace) {
+    } catch (e, stackTrace) {
       if (e is ApiException && e.response.statusCode == 404) {
         // no albums
         return;
       }
-      yield Tuple2(e, stacktrace);
+      yield ExceptionEvent(e, stackTrace);
       return;
     }
     final albumFiles =
@@ -36,8 +36,8 @@ class ListPendingSharedAlbum {
     for (final f in albumFiles) {
       try {
         yield await albumRepo.get(account, f);
-      } catch (e, stacktrace) {
+      } catch (e, stackTrace) {
-        yield Tuple2(e, stacktrace);
+        yield ExceptionEvent(e, stackTrace);
       }
     }
     try {