implemented auth repository and service in dart (JWT)

backend-dart/lib/domain/data/project_data_source.dart

@@ -1,5 +1,5 @@
 import 'package:backend_dart/domain/entities/project.dart';
-import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/domain/errors/error.dart';
 import 'package:fpdart/fpdart.dart';
 
 /// Interface for managing project data interactions.

backend-dart/lib/domain/data/project_task_data_source.dart

@@ -1,5 +1,5 @@
 import 'package:backend_dart/domain/entities/project_task.dart';
-import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/domain/errors/error.dart';
 import 'package:fpdart/fpdart.dart';
 
 /// Interface for managing task data interactions.

backend-dart/lib/domain/data/time_entry_data_source.dart

@@ -1,5 +1,5 @@
 import 'package:backend_dart/domain/entities/time_entry.dart';
-import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/domain/errors/error.dart';
 import 'package:fpdart/fpdart.dart';
 
 /// Interface for managing time entry data interactions.

backend-dart/lib/domain/data/user_data_source.dart

@@ -1,5 +1,5 @@
 import 'package:backend_dart/domain/entities/user.dart';
-import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/domain/errors/error.dart';
 import 'package:fpdart/fpdart.dart';
 
 abstract class UserDataSource {

backend-dart/lib/domain/errors/app_error.dart

@@ -1,4 +1,4 @@
-import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/domain/errors/error.dart';
 import 'package:freezed_annotation/freezed_annotation.dart';
 import 'error_code.dart';
 
@@ -48,4 +48,8 @@ class AppError with _$AppError implements IError {
   factory AppError.inputError({String? message}) {
     return AppError.fromErrorCode(ErrorCode.inputError, message: message);
   }
+
+  factory AppError.authenticationError({String? message}) {
+    return AppError.fromErrorCode(ErrorCode.authenticationError, message: message);
+  }
 }

backend-dart/lib/domain/errors/error_code.dart

@@ -3,6 +3,7 @@ enum ErrorCode {
   validationError, // Eingabevalidierungsfehler
   unexpectedError, // Unerwarteter Fehler
   authenticationError, // Authentifizierungsfehler
+  authorizationError, // Autorisierungsfehler
   permissionDenied, // Berechtigungsfehler
   notFound, // Ressource nicht gefunden
   exception, // Ausnahme

backend-dart/lib/domain/interface/mapper.dart

@@ -1,16 +0,0 @@
-import 'package:backend_dart/domain/interface/error.dart';
-import 'package:fpdart/fpdart.dart';
-
-abstract class IMapper<U, V> {
-  /// Konvertiert von Typ U (Origin) zu Typ V (Target)
-  TaskEither<IError, V> to(U origin);
-
-  /// Konvertiert von Typ V (Target) zu Typ U (Origin)
-  TaskEither<IError, U> from(V target);
-
-  /// Konvertiert eine Liste von Typ U (Origin) zu einer Liste von Typ V (Target)
-  TaskEither<IError, List<V>> listTo(Iterable<U> origins);
-
-  /// Konvertiert eine Liste von Typ V (Target) zu einer Liste von Typ U (Origin)
-  TaskEither<IError, List<U>> listFrom(Iterable<V> targets);
-}

backend-dart/lib/domain/repository/auth_repository.dart

@@ -0,0 +1,8 @@
+import 'package:backend_dart/domain/errors/error.dart';
+import 'package:fpdart/fpdart.dart';
+
+abstract class AuthRepository {
+  TaskEither<IError, String> generateToken(String userId);
+  TaskEither<IError, String> validateToken(String token);
+  TaskEither<IError, void> revokeToken(String token);
+}

backend-dart/lib/domain/repository/project_repository.dart

@@ -1,6 +1,6 @@
 import 'package:fpdart/fpdart.dart';
 import 'package:backend_dart/domain/entities/project.dart';
-import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/domain/errors/error.dart';
 
 abstract class ProjectRepository {
   /// Creates a new project.

backend-dart/lib/domain/repository/project_task_repository.dart

@@ -1,6 +1,6 @@
 import 'package:fpdart/fpdart.dart';
 import 'package:backend_dart/domain/entities/project_task.dart';
-import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/domain/errors/error.dart';
 
 abstract class ProjectTaskRepository {
   /// Creates a new project task.

backend-dart/lib/domain/repository/time_entry_repository.dart

@@ -1,6 +1,6 @@
 import 'package:fpdart/fpdart.dart';
 import 'package:backend_dart/domain/entities/time_entry.dart';
-import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/domain/errors/error.dart';
 
 abstract class TimeEntryRepository {
   /// Creates a new time entry.

backend-dart/lib/domain/repository/user_repository.dart

@@ -1,5 +1,5 @@
 import 'package:backend_dart/domain/entities/user.dart';
-import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/domain/errors/error.dart';
 import 'package:fpdart/fpdart.dart';
 
 abstract class UserRepository {