TF-239 Empty trash folder

lib/features/thread/domain/repository/thread_repository.dart

@@ -64,4 +64,6 @@ abstract class ThreadRepository {
       Properties? properties,
     }
   );
+
+  Future<bool> emptyTrashFolder(AccountId accountId, MailboxId trashMailboxId);
 }

lib/features/thread/domain/state/empty_trash_folder_state.dart

@@ -0,0 +1,18 @@
+import 'package:core/core.dart';
+
+class EmptyTrashFolderSuccess extends UIState {
+
+  EmptyTrashFolderSuccess();
+
+  @override
+  List<Object?> get props => [];
+}
+
+class EmptyTrashFolderFailure extends FeatureFailure {
+  final exception;
+
+  EmptyTrashFolderFailure(this.exception);
+
+  @override
+  List<Object> get props => [exception];
+}

lib/features/thread/domain/usecases/empty_trash_folder_interactor.dart

@@ -0,0 +1,27 @@
+import 'package:core/core.dart';
+import 'package:dartz/dartz.dart';
+import 'package:jmap_dart_client/jmap/account_id.dart';
+import 'package:jmap_dart_client/jmap/mail/mailbox/mailbox.dart';
+import 'package:tmail_ui_user/features/thread/domain/repository/thread_repository.dart';
+import 'package:tmail_ui_user/features/thread/domain/state/empty_trash_folder_state.dart';
+
+class EmptyTrashFolderInteractor {
+  final ThreadRepository threadRepository;
+
+  EmptyTrashFolderInteractor(this.threadRepository);
+
+  Stream<Either<Failure, Success>> execute(AccountId accountId, MailboxId trashMailboxId) async* {
+    try {
+      yield Right<Failure, Success>(LoadingState());
+
+      final result = await threadRepository.emptyTrashFolder(accountId, trashMailboxId);
+      if (result) {
+        yield Right<Failure, Success>(EmptyTrashFolderSuccess());
+      } else {
+        yield Left<Failure, Success>(EmptyTrashFolderFailure(null));
+      }
+    } catch (e) {
+      yield Left<Failure, Success>(EmptyTrashFolderFailure(e));
+    }
+  }
+}