implemented other repos, services, objects ...

backend-dart/lib/application/repository/project_repository_impl.dart

@@ -0,0 +1,38 @@
+import 'package:backend_dart/domain/data/database.dart';
+import 'package:backend_dart/domain/entities/project.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/domain/repository/project_repository.dart';
+import 'package:fpdart/fpdart.dart';
+
+class ProjectRepositoryImpl implements ProjectRepository {
+  final IDatabase database;
+  ProjectRepositoryImpl(this.database);
+
+  @override
+  TaskEither<IError, Project> create(ProjectCreate project) {
+    return database.projects
+        .generateId()
+        .map((id) => project.copyWith(id: id))
+        .flatMap(database.projects.create);
+  }
+
+  @override
+  TaskEither<IError, Project> findById(String id) {
+    return database.projects.findById(id);
+  }
+
+  @override
+  TaskEither<IError, Project> update(ProjectUpdate project) {
+    return database.projects.update(project);
+  }
+
+  @override
+  TaskEither<IError, void> delete(String id) {
+    return database.projects.delete(id);
+  }
+
+  @override
+  TaskEither<IError, List<Project>> findAll() {
+    return database.projects.findAll();
+  }
+}

backend-dart/lib/application/repository/project_task_repository_impl.dart

@@ -0,0 +1,43 @@
+import 'package:backend_dart/domain/data/database.dart';
+import 'package:backend_dart/domain/entities/project_task.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/domain/repository/project_task_repository.dart';
+import 'package:fpdart/fpdart.dart';
+
+class ProjectTaskRepositoryImpl implements ProjectTaskRepository {
+  final IDatabase database;
+  ProjectTaskRepositoryImpl(this.database);
+
+  @override
+  TaskEither<IError, ProjectTask> create(ProjectTaskCreate task) {
+    return database.tasks
+        .generateId()
+        .map((id) => task.copyWith(id: id))
+        .flatMap(database.tasks.create);
+  }
+
+  @override
+  TaskEither<IError, ProjectTask> findById(String id) {
+    return database.tasks.findById(id);
+  }
+
+  @override
+  TaskEither<IError, List<ProjectTask>> findByProjectId(String projectId) {
+    return database.tasks.findByProjectId(projectId);
+  }
+
+  @override
+  TaskEither<IError, ProjectTask> update(ProjectTaskUpdate task) {
+    return database.tasks.update(task);
+  }
+
+  @override
+  TaskEither<IError, void> delete(String id) {
+    return database.tasks.delete(id);
+  }
+
+  @override
+  TaskEither<IError, List<ProjectTask>> findAll() {
+    return database.tasks.findAll();
+  }
+}

backend-dart/lib/application/repository/provider.dart

@@ -1,4 +1,10 @@
+import 'package:backend_dart/application/repository/project_repository_impl.dart';
+import 'package:backend_dart/application/repository/project_task_repository_impl.dart';
+import 'package:backend_dart/application/repository/time_entry_repository_impl.dart';
 import 'package:backend_dart/application/repository/user_repository_impl.dart';
+import 'package:backend_dart/domain/repository/project_repository.dart';
+import 'package:backend_dart/domain/repository/project_task_repository.dart';
+import 'package:backend_dart/domain/repository/time_entry_repository.dart';
 import 'package:backend_dart/domain/repository/user_repository.dart';
 import 'package:backend_dart/infrastructure/persistence/database_provider.dart';
 import 'package:riverpod/riverpod.dart';
@@ -7,3 +13,18 @@ final userRepoProvider = Provider<UserRepository>((ref) {
   final database = ref.read(databaseProvider);
   return UserRepositoryImpl(database);
 });
+
+final projectTaskProvider = Provider<ProjectTaskRepository>((ref) {
+  final database = ref.read(databaseProvider);
+  return ProjectTaskRepositoryImpl(database);
+});
+
+final projectProvider = Provider<ProjectRepository>((ref) {
+  final database = ref.read(databaseProvider);
+  return ProjectRepositoryImpl(database);
+});
+
+final timeEntryProvider = Provider<TimeEntryRepository>((ref) {
+  final database = ref.read(databaseProvider);
+  return TimeEntryRepositoryImpl(database);
+});

backend-dart/lib/application/repository/time_entry_repository_impl.dart

@@ -0,0 +1,48 @@
+import 'package:backend_dart/domain/data/database.dart';
+import 'package:backend_dart/domain/entities/time_entry.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/domain/repository/time_entry_repository.dart';
+import 'package:fpdart/fpdart.dart';
+
+class TimeEntryRepositoryImpl implements TimeEntryRepository {
+  final IDatabase database;
+  TimeEntryRepositoryImpl(this.database);
+
+  @override
+  TaskEither<IError, TimeEntry> create(TimeEntryCreate timeEntry) {
+    return database.timeEntries
+        .generateId()
+        .map((id) => timeEntry.copyWith(id: id))
+        .flatMap(database.timeEntries.create);
+  }
+
+  @override
+  TaskEither<IError, TimeEntry> findById(String id) {
+    return database.timeEntries.findById(id);
+  }
+
+  @override
+  TaskEither<IError, List<TimeEntry>> findByUserId(String userId) {
+    return database.timeEntries.findByUserId(userId);
+  }
+
+  @override
+  TaskEither<IError, List<TimeEntry>> findByProjectId(String projectId) {
+    return database.timeEntries.findByProjectId(projectId);
+  }
+
+  @override
+  TaskEither<IError, TimeEntry> update(TimeEntryUpdate timeEntry) {
+    return database.timeEntries.update(timeEntry);
+  }
+
+  @override
+  TaskEither<IError, void> delete(String id) {
+    return database.timeEntries.delete(id);
+  }
+
+  @override
+  TaskEither<IError, List<TimeEntry>> findAll() {
+    return database.timeEntries.findAll();
+  }
+}

backend-dart/lib/application/service/dto/project_dto.dart

@@ -0,0 +1,50 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'project_dto.freezed.dart';
+part 'project_dto.g.dart';
+
+@freezed
+class ProjectDto with _$ProjectDto {
+  const factory ProjectDto({
+    required String id,
+    required String name,
+    String? description,
+    String? clientId,
+    required String userId,
+    required DateTime createdAt,
+    required DateTime updatedAt,
+  }) = _ProjectDto;
+
+  /// JSON-Serialisierung
+  factory ProjectDto.fromJson(Map<String, dynamic> json) =>
+      _$ProjectDtoFromJson(json);
+}
+
+@freezed
+class ProjectCreateDto with _$ProjectCreateDto {
+  const factory ProjectCreateDto({
+    required String name,
+    String? description,
+    String? clientId,
+    required String userId,
+  }) = _ProjectCreateDto;
+
+  /// JSON-Serialisierung
+  factory ProjectCreateDto.fromJson(Map<String, dynamic> json) =>
+      _$ProjectCreateDtoFromJson(json);
+}
+
+@freezed
+class ProjectUpdateDto with _$ProjectUpdateDto {
+  const factory ProjectUpdateDto({
+    required String id,
+    String? name,
+    String? description,
+    String? clientId,
+    String? userId,
+  }) = _ProjectUpdateDto;
+
+  /// JSON-Serialisierung
+  factory ProjectUpdateDto.fromJson(Map<String, dynamic> json) =>
+      _$ProjectUpdateDtoFromJson(json);
+}

backend-dart/lib/application/service/dto/project_dto.freezed.dart

@@ -0,0 +1,741 @@
+// coverage:ignore-file
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint
+// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides, invalid_annotation_target, unnecessary_question_mark
+
+part of 'project_dto.dart';
+
+// **************************************************************************
+// FreezedGenerator
+// **************************************************************************
+
+T _$identity<T>(T value) => value;
+
+final _privateConstructorUsedError = UnsupportedError(
+    'It seems like you constructed your class using `MyClass._()`. This constructor is only meant to be used by freezed and you are not supposed to need it nor use it.\nPlease check the documentation here for more information: https://github.com/rrousselGit/freezed#adding-getters-and-methods-to-our-models');
+
+ProjectDto _$ProjectDtoFromJson(Map<String, dynamic> json) {
+  return _ProjectDto.fromJson(json);
+}
+
+/// @nodoc
+mixin _$ProjectDto {
+  String get id => throw _privateConstructorUsedError;
+  String get name => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String? get clientId => throw _privateConstructorUsedError;
+  String get userId => throw _privateConstructorUsedError;
+  DateTime get createdAt => throw _privateConstructorUsedError;
+  DateTime get updatedAt => throw _privateConstructorUsedError;
+
+  /// Serializes this ProjectDto to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of ProjectDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $ProjectDtoCopyWith<ProjectDto> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $ProjectDtoCopyWith<$Res> {
+  factory $ProjectDtoCopyWith(
+          ProjectDto value, $Res Function(ProjectDto) then) =
+      _$ProjectDtoCopyWithImpl<$Res, ProjectDto>;
+  @useResult
+  $Res call(
+      {String id,
+      String name,
+      String? description,
+      String? clientId,
+      String userId,
+      DateTime createdAt,
+      DateTime updatedAt});
+}
+
+/// @nodoc
+class _$ProjectDtoCopyWithImpl<$Res, $Val extends ProjectDto>
+    implements $ProjectDtoCopyWith<$Res> {
+  _$ProjectDtoCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of ProjectDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? name = null,
+    Object? description = freezed,
+    Object? clientId = freezed,
+    Object? userId = null,
+    Object? createdAt = null,
+    Object? updatedAt = null,
+  }) {
+    return _then(_value.copyWith(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      name: null == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      clientId: freezed == clientId
+          ? _value.clientId
+          : clientId // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: null == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String,
+      createdAt: null == createdAt
+          ? _value.createdAt
+          : createdAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      updatedAt: null == updatedAt
+          ? _value.updatedAt
+          : updatedAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$ProjectDtoImplCopyWith<$Res>
+    implements $ProjectDtoCopyWith<$Res> {
+  factory _$$ProjectDtoImplCopyWith(
+          _$ProjectDtoImpl value, $Res Function(_$ProjectDtoImpl) then) =
+      __$$ProjectDtoImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call(
+      {String id,
+      String name,
+      String? description,
+      String? clientId,
+      String userId,
+      DateTime createdAt,
+      DateTime updatedAt});
+}
+
+/// @nodoc
+class __$$ProjectDtoImplCopyWithImpl<$Res>
+    extends _$ProjectDtoCopyWithImpl<$Res, _$ProjectDtoImpl>
+    implements _$$ProjectDtoImplCopyWith<$Res> {
+  __$$ProjectDtoImplCopyWithImpl(
+      _$ProjectDtoImpl _value, $Res Function(_$ProjectDtoImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of ProjectDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? name = null,
+    Object? description = freezed,
+    Object? clientId = freezed,
+    Object? userId = null,
+    Object? createdAt = null,
+    Object? updatedAt = null,
+  }) {
+    return _then(_$ProjectDtoImpl(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      name: null == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      clientId: freezed == clientId
+          ? _value.clientId
+          : clientId // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: null == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String,
+      createdAt: null == createdAt
+          ? _value.createdAt
+          : createdAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      updatedAt: null == updatedAt
+          ? _value.updatedAt
+          : updatedAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$ProjectDtoImpl implements _ProjectDto {
+  const _$ProjectDtoImpl(
+      {required this.id,
+      required this.name,
+      this.description,
+      this.clientId,
+      required this.userId,
+      required this.createdAt,
+      required this.updatedAt});
+
+  factory _$ProjectDtoImpl.fromJson(Map<String, dynamic> json) =>
+      _$$ProjectDtoImplFromJson(json);
+
+  @override
+  final String id;
+  @override
+  final String name;
+  @override
+  final String? description;
+  @override
+  final String? clientId;
+  @override
+  final String userId;
+  @override
+  final DateTime createdAt;
+  @override
+  final DateTime updatedAt;
+
+  @override
+  String toString() {
+    return 'ProjectDto(id: $id, name: $name, description: $description, clientId: $clientId, userId: $userId, createdAt: $createdAt, updatedAt: $updatedAt)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$ProjectDtoImpl &&
+            (identical(other.id, id) || other.id == id) &&
+            (identical(other.name, name) || other.name == name) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.clientId, clientId) ||
+                other.clientId == clientId) &&
+            (identical(other.userId, userId) || other.userId == userId) &&
+            (identical(other.createdAt, createdAt) ||
+                other.createdAt == createdAt) &&
+            (identical(other.updatedAt, updatedAt) ||
+                other.updatedAt == updatedAt));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode => Object.hash(runtimeType, id, name, description, clientId,
+      userId, createdAt, updatedAt);
+
+  /// Create a copy of ProjectDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$ProjectDtoImplCopyWith<_$ProjectDtoImpl> get copyWith =>
+      __$$ProjectDtoImplCopyWithImpl<_$ProjectDtoImpl>(this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$ProjectDtoImplToJson(
+      this,
+    );
+  }
+}
+
+abstract class _ProjectDto implements ProjectDto {
+  const factory _ProjectDto(
+      {required final String id,
+      required final String name,
+      final String? description,
+      final String? clientId,
+      required final String userId,
+      required final DateTime createdAt,
+      required final DateTime updatedAt}) = _$ProjectDtoImpl;
+
+  factory _ProjectDto.fromJson(Map<String, dynamic> json) =
+      _$ProjectDtoImpl.fromJson;
+
+  @override
+  String get id;
+  @override
+  String get name;
+  @override
+  String? get description;
+  @override
+  String? get clientId;
+  @override
+  String get userId;
+  @override
+  DateTime get createdAt;
+  @override
+  DateTime get updatedAt;
+
+  /// Create a copy of ProjectDto
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$ProjectDtoImplCopyWith<_$ProjectDtoImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+ProjectCreateDto _$ProjectCreateDtoFromJson(Map<String, dynamic> json) {
+  return _ProjectCreateDto.fromJson(json);
+}
+
+/// @nodoc
+mixin _$ProjectCreateDto {
+  String get name => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String? get clientId => throw _privateConstructorUsedError;
+  String get userId => throw _privateConstructorUsedError;
+
+  /// Serializes this ProjectCreateDto to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of ProjectCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $ProjectCreateDtoCopyWith<ProjectCreateDto> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $ProjectCreateDtoCopyWith<$Res> {
+  factory $ProjectCreateDtoCopyWith(
+          ProjectCreateDto value, $Res Function(ProjectCreateDto) then) =
+      _$ProjectCreateDtoCopyWithImpl<$Res, ProjectCreateDto>;
+  @useResult
+  $Res call(
+      {String name, String? description, String? clientId, String userId});
+}
+
+/// @nodoc
+class _$ProjectCreateDtoCopyWithImpl<$Res, $Val extends ProjectCreateDto>
+    implements $ProjectCreateDtoCopyWith<$Res> {
+  _$ProjectCreateDtoCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of ProjectCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? name = null,
+    Object? description = freezed,
+    Object? clientId = freezed,
+    Object? userId = null,
+  }) {
+    return _then(_value.copyWith(
+      name: null == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      clientId: freezed == clientId
+          ? _value.clientId
+          : clientId // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: null == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$ProjectCreateDtoImplCopyWith<$Res>
+    implements $ProjectCreateDtoCopyWith<$Res> {
+  factory _$$ProjectCreateDtoImplCopyWith(_$ProjectCreateDtoImpl value,
+          $Res Function(_$ProjectCreateDtoImpl) then) =
+      __$$ProjectCreateDtoImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call(
+      {String name, String? description, String? clientId, String userId});
+}
+
+/// @nodoc
+class __$$ProjectCreateDtoImplCopyWithImpl<$Res>
+    extends _$ProjectCreateDtoCopyWithImpl<$Res, _$ProjectCreateDtoImpl>
+    implements _$$ProjectCreateDtoImplCopyWith<$Res> {
+  __$$ProjectCreateDtoImplCopyWithImpl(_$ProjectCreateDtoImpl _value,
+      $Res Function(_$ProjectCreateDtoImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of ProjectCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? name = null,
+    Object? description = freezed,
+    Object? clientId = freezed,
+    Object? userId = null,
+  }) {
+    return _then(_$ProjectCreateDtoImpl(
+      name: null == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      clientId: freezed == clientId
+          ? _value.clientId
+          : clientId // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: null == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$ProjectCreateDtoImpl implements _ProjectCreateDto {
+  const _$ProjectCreateDtoImpl(
+      {required this.name,
+      this.description,
+      this.clientId,
+      required this.userId});
+
+  factory _$ProjectCreateDtoImpl.fromJson(Map<String, dynamic> json) =>
+      _$$ProjectCreateDtoImplFromJson(json);
+
+  @override
+  final String name;
+  @override
+  final String? description;
+  @override
+  final String? clientId;
+  @override
+  final String userId;
+
+  @override
+  String toString() {
+    return 'ProjectCreateDto(name: $name, description: $description, clientId: $clientId, userId: $userId)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$ProjectCreateDtoImpl &&
+            (identical(other.name, name) || other.name == name) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.clientId, clientId) ||
+                other.clientId == clientId) &&
+            (identical(other.userId, userId) || other.userId == userId));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode =>
+      Object.hash(runtimeType, name, description, clientId, userId);
+
+  /// Create a copy of ProjectCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$ProjectCreateDtoImplCopyWith<_$ProjectCreateDtoImpl> get copyWith =>
+      __$$ProjectCreateDtoImplCopyWithImpl<_$ProjectCreateDtoImpl>(
+          this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$ProjectCreateDtoImplToJson(
+      this,
+    );
+  }
+}
+
+abstract class _ProjectCreateDto implements ProjectCreateDto {
+  const factory _ProjectCreateDto(
+      {required final String name,
+      final String? description,
+      final String? clientId,
+      required final String userId}) = _$ProjectCreateDtoImpl;
+
+  factory _ProjectCreateDto.fromJson(Map<String, dynamic> json) =
+      _$ProjectCreateDtoImpl.fromJson;
+
+  @override
+  String get name;
+  @override
+  String? get description;
+  @override
+  String? get clientId;
+  @override
+  String get userId;
+
+  /// Create a copy of ProjectCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$ProjectCreateDtoImplCopyWith<_$ProjectCreateDtoImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+ProjectUpdateDto _$ProjectUpdateDtoFromJson(Map<String, dynamic> json) {
+  return _ProjectUpdateDto.fromJson(json);
+}
+
+/// @nodoc
+mixin _$ProjectUpdateDto {
+  String get id => throw _privateConstructorUsedError;
+  String? get name => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String? get clientId => throw _privateConstructorUsedError;
+  String? get userId => throw _privateConstructorUsedError;
+
+  /// Serializes this ProjectUpdateDto to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of ProjectUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $ProjectUpdateDtoCopyWith<ProjectUpdateDto> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $ProjectUpdateDtoCopyWith<$Res> {
+  factory $ProjectUpdateDtoCopyWith(
+          ProjectUpdateDto value, $Res Function(ProjectUpdateDto) then) =
+      _$ProjectUpdateDtoCopyWithImpl<$Res, ProjectUpdateDto>;
+  @useResult
+  $Res call(
+      {String id,
+      String? name,
+      String? description,
+      String? clientId,
+      String? userId});
+}
+
+/// @nodoc
+class _$ProjectUpdateDtoCopyWithImpl<$Res, $Val extends ProjectUpdateDto>
+    implements $ProjectUpdateDtoCopyWith<$Res> {
+  _$ProjectUpdateDtoCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of ProjectUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? name = freezed,
+    Object? description = freezed,
+    Object? clientId = freezed,
+    Object? userId = freezed,
+  }) {
+    return _then(_value.copyWith(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      name: freezed == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String?,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      clientId: freezed == clientId
+          ? _value.clientId
+          : clientId // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: freezed == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String?,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$ProjectUpdateDtoImplCopyWith<$Res>
+    implements $ProjectUpdateDtoCopyWith<$Res> {
+  factory _$$ProjectUpdateDtoImplCopyWith(_$ProjectUpdateDtoImpl value,
+          $Res Function(_$ProjectUpdateDtoImpl) then) =
+      __$$ProjectUpdateDtoImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call(
+      {String id,
+      String? name,
+      String? description,
+      String? clientId,
+      String? userId});
+}
+
+/// @nodoc
+class __$$ProjectUpdateDtoImplCopyWithImpl<$Res>
+    extends _$ProjectUpdateDtoCopyWithImpl<$Res, _$ProjectUpdateDtoImpl>
+    implements _$$ProjectUpdateDtoImplCopyWith<$Res> {
+  __$$ProjectUpdateDtoImplCopyWithImpl(_$ProjectUpdateDtoImpl _value,
+      $Res Function(_$ProjectUpdateDtoImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of ProjectUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? name = freezed,
+    Object? description = freezed,
+    Object? clientId = freezed,
+    Object? userId = freezed,
+  }) {
+    return _then(_$ProjectUpdateDtoImpl(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      name: freezed == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String?,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      clientId: freezed == clientId
+          ? _value.clientId
+          : clientId // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: freezed == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String?,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$ProjectUpdateDtoImpl implements _ProjectUpdateDto {
+  const _$ProjectUpdateDtoImpl(
+      {required this.id,
+      this.name,
+      this.description,
+      this.clientId,
+      this.userId});
+
+  factory _$ProjectUpdateDtoImpl.fromJson(Map<String, dynamic> json) =>
+      _$$ProjectUpdateDtoImplFromJson(json);
+
+  @override
+  final String id;
+  @override
+  final String? name;
+  @override
+  final String? description;
+  @override
+  final String? clientId;
+  @override
+  final String? userId;
+
+  @override
+  String toString() {
+    return 'ProjectUpdateDto(id: $id, name: $name, description: $description, clientId: $clientId, userId: $userId)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$ProjectUpdateDtoImpl &&
+            (identical(other.id, id) || other.id == id) &&
+            (identical(other.name, name) || other.name == name) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.clientId, clientId) ||
+                other.clientId == clientId) &&
+            (identical(other.userId, userId) || other.userId == userId));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode =>
+      Object.hash(runtimeType, id, name, description, clientId, userId);
+
+  /// Create a copy of ProjectUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$ProjectUpdateDtoImplCopyWith<_$ProjectUpdateDtoImpl> get copyWith =>
+      __$$ProjectUpdateDtoImplCopyWithImpl<_$ProjectUpdateDtoImpl>(
+          this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$ProjectUpdateDtoImplToJson(
+      this,
+    );
+  }
+}
+
+abstract class _ProjectUpdateDto implements ProjectUpdateDto {
+  const factory _ProjectUpdateDto(
+      {required final String id,
+      final String? name,
+      final String? description,
+      final String? clientId,
+      final String? userId}) = _$ProjectUpdateDtoImpl;
+
+  factory _ProjectUpdateDto.fromJson(Map<String, dynamic> json) =
+      _$ProjectUpdateDtoImpl.fromJson;
+
+  @override
+  String get id;
+  @override
+  String? get name;
+  @override
+  String? get description;
+  @override
+  String? get clientId;
+  @override
+  String? get userId;
+
+  /// Create a copy of ProjectUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$ProjectUpdateDtoImplCopyWith<_$ProjectUpdateDtoImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}

backend-dart/lib/application/service/dto/project_dto.g.dart

@@ -0,0 +1,67 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'project_dto.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_$ProjectDtoImpl _$$ProjectDtoImplFromJson(Map<String, dynamic> json) =>
+    _$ProjectDtoImpl(
+      id: json['id'] as String,
+      name: json['name'] as String,
+      description: json['description'] as String?,
+      clientId: json['clientId'] as String?,
+      userId: json['userId'] as String,
+      createdAt: DateTime.parse(json['createdAt'] as String),
+      updatedAt: DateTime.parse(json['updatedAt'] as String),
+    );
+
+Map<String, dynamic> _$$ProjectDtoImplToJson(_$ProjectDtoImpl instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'name': instance.name,
+      'description': instance.description,
+      'clientId': instance.clientId,
+      'userId': instance.userId,
+      'createdAt': instance.createdAt.toIso8601String(),
+      'updatedAt': instance.updatedAt.toIso8601String(),
+    };
+
+_$ProjectCreateDtoImpl _$$ProjectCreateDtoImplFromJson(
+        Map<String, dynamic> json) =>
+    _$ProjectCreateDtoImpl(
+      name: json['name'] as String,
+      description: json['description'] as String?,
+      clientId: json['clientId'] as String?,
+      userId: json['userId'] as String,
+    );
+
+Map<String, dynamic> _$$ProjectCreateDtoImplToJson(
+        _$ProjectCreateDtoImpl instance) =>
+    <String, dynamic>{
+      'name': instance.name,
+      'description': instance.description,
+      'clientId': instance.clientId,
+      'userId': instance.userId,
+    };
+
+_$ProjectUpdateDtoImpl _$$ProjectUpdateDtoImplFromJson(
+        Map<String, dynamic> json) =>
+    _$ProjectUpdateDtoImpl(
+      id: json['id'] as String,
+      name: json['name'] as String?,
+      description: json['description'] as String?,
+      clientId: json['clientId'] as String?,
+      userId: json['userId'] as String?,
+    );
+
+Map<String, dynamic> _$$ProjectUpdateDtoImplToJson(
+        _$ProjectUpdateDtoImpl instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'name': instance.name,
+      'description': instance.description,
+      'clientId': instance.clientId,
+      'userId': instance.userId,
+    };

backend-dart/lib/application/service/dto/project_task_dto.dart

@@ -0,0 +1,46 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'project_task_dto.freezed.dart';
+part 'project_task_dto.g.dart';
+
+@freezed
+class ProjectTaskDto with _$ProjectTaskDto {
+  const factory ProjectTaskDto({
+    required String id,
+    required String name,
+    String? description,
+    required String projectId,
+    required DateTime createdAt,
+    required DateTime updatedAt,
+  }) = _ProjectTaskDto;
+
+  /// JSON-Serialisierung
+  factory ProjectTaskDto.fromJson(Map<String, dynamic> json) =>
+      _$ProjectTaskDtoFromJson(json);
+}
+
+@freezed
+class ProjectTaskCreateDto with _$ProjectTaskCreateDto {
+  const factory ProjectTaskCreateDto({
+    required String name,
+    String? description,
+    required String projectId,
+  }) = _ProjectTaskCreateDto;
+
+  /// JSON-Serialisierung
+  factory ProjectTaskCreateDto.fromJson(Map<String, dynamic> json) =>
+      _$ProjectTaskCreateDtoFromJson(json);
+}
+
+@freezed
+class ProjectTaskUpdateDto with _$ProjectTaskUpdateDto {
+  const factory ProjectTaskUpdateDto({
+    String? name,
+    String? description,
+    String? projectId,
+  }) = _ProjectTaskUpdateDto;
+
+  /// JSON-Serialisierung
+  factory ProjectTaskUpdateDto.fromJson(Map<String, dynamic> json) =>
+      _$ProjectTaskUpdateDtoFromJson(json);
+}

backend-dart/lib/application/service/dto/project_task_dto.freezed.dart

@@ -0,0 +1,654 @@
+// coverage:ignore-file
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint
+// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides, invalid_annotation_target, unnecessary_question_mark
+
+part of 'project_task_dto.dart';
+
+// **************************************************************************
+// FreezedGenerator
+// **************************************************************************
+
+T _$identity<T>(T value) => value;
+
+final _privateConstructorUsedError = UnsupportedError(
+    'It seems like you constructed your class using `MyClass._()`. This constructor is only meant to be used by freezed and you are not supposed to need it nor use it.\nPlease check the documentation here for more information: https://github.com/rrousselGit/freezed#adding-getters-and-methods-to-our-models');
+
+ProjectTaskDto _$ProjectTaskDtoFromJson(Map<String, dynamic> json) {
+  return _ProjectTaskDto.fromJson(json);
+}
+
+/// @nodoc
+mixin _$ProjectTaskDto {
+  String get id => throw _privateConstructorUsedError;
+  String get name => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String get projectId => throw _privateConstructorUsedError;
+  DateTime get createdAt => throw _privateConstructorUsedError;
+  DateTime get updatedAt => throw _privateConstructorUsedError;
+
+  /// Serializes this ProjectTaskDto to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of ProjectTaskDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $ProjectTaskDtoCopyWith<ProjectTaskDto> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $ProjectTaskDtoCopyWith<$Res> {
+  factory $ProjectTaskDtoCopyWith(
+          ProjectTaskDto value, $Res Function(ProjectTaskDto) then) =
+      _$ProjectTaskDtoCopyWithImpl<$Res, ProjectTaskDto>;
+  @useResult
+  $Res call(
+      {String id,
+      String name,
+      String? description,
+      String projectId,
+      DateTime createdAt,
+      DateTime updatedAt});
+}
+
+/// @nodoc
+class _$ProjectTaskDtoCopyWithImpl<$Res, $Val extends ProjectTaskDto>
+    implements $ProjectTaskDtoCopyWith<$Res> {
+  _$ProjectTaskDtoCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of ProjectTaskDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? name = null,
+    Object? description = freezed,
+    Object? projectId = null,
+    Object? createdAt = null,
+    Object? updatedAt = null,
+  }) {
+    return _then(_value.copyWith(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      name: null == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+      createdAt: null == createdAt
+          ? _value.createdAt
+          : createdAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      updatedAt: null == updatedAt
+          ? _value.updatedAt
+          : updatedAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$ProjectTaskDtoImplCopyWith<$Res>
+    implements $ProjectTaskDtoCopyWith<$Res> {
+  factory _$$ProjectTaskDtoImplCopyWith(_$ProjectTaskDtoImpl value,
+          $Res Function(_$ProjectTaskDtoImpl) then) =
+      __$$ProjectTaskDtoImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call(
+      {String id,
+      String name,
+      String? description,
+      String projectId,
+      DateTime createdAt,
+      DateTime updatedAt});
+}
+
+/// @nodoc
+class __$$ProjectTaskDtoImplCopyWithImpl<$Res>
+    extends _$ProjectTaskDtoCopyWithImpl<$Res, _$ProjectTaskDtoImpl>
+    implements _$$ProjectTaskDtoImplCopyWith<$Res> {
+  __$$ProjectTaskDtoImplCopyWithImpl(
+      _$ProjectTaskDtoImpl _value, $Res Function(_$ProjectTaskDtoImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of ProjectTaskDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? name = null,
+    Object? description = freezed,
+    Object? projectId = null,
+    Object? createdAt = null,
+    Object? updatedAt = null,
+  }) {
+    return _then(_$ProjectTaskDtoImpl(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      name: null == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+      createdAt: null == createdAt
+          ? _value.createdAt
+          : createdAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      updatedAt: null == updatedAt
+          ? _value.updatedAt
+          : updatedAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$ProjectTaskDtoImpl implements _ProjectTaskDto {
+  const _$ProjectTaskDtoImpl(
+      {required this.id,
+      required this.name,
+      this.description,
+      required this.projectId,
+      required this.createdAt,
+      required this.updatedAt});
+
+  factory _$ProjectTaskDtoImpl.fromJson(Map<String, dynamic> json) =>
+      _$$ProjectTaskDtoImplFromJson(json);
+
+  @override
+  final String id;
+  @override
+  final String name;
+  @override
+  final String? description;
+  @override
+  final String projectId;
+  @override
+  final DateTime createdAt;
+  @override
+  final DateTime updatedAt;
+
+  @override
+  String toString() {
+    return 'ProjectTaskDto(id: $id, name: $name, description: $description, projectId: $projectId, createdAt: $createdAt, updatedAt: $updatedAt)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$ProjectTaskDtoImpl &&
+            (identical(other.id, id) || other.id == id) &&
+            (identical(other.name, name) || other.name == name) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.projectId, projectId) ||
+                other.projectId == projectId) &&
+            (identical(other.createdAt, createdAt) ||
+                other.createdAt == createdAt) &&
+            (identical(other.updatedAt, updatedAt) ||
+                other.updatedAt == updatedAt));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode => Object.hash(
+      runtimeType, id, name, description, projectId, createdAt, updatedAt);
+
+  /// Create a copy of ProjectTaskDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$ProjectTaskDtoImplCopyWith<_$ProjectTaskDtoImpl> get copyWith =>
+      __$$ProjectTaskDtoImplCopyWithImpl<_$ProjectTaskDtoImpl>(
+          this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$ProjectTaskDtoImplToJson(
+      this,
+    );
+  }
+}
+
+abstract class _ProjectTaskDto implements ProjectTaskDto {
+  const factory _ProjectTaskDto(
+      {required final String id,
+      required final String name,
+      final String? description,
+      required final String projectId,
+      required final DateTime createdAt,
+      required final DateTime updatedAt}) = _$ProjectTaskDtoImpl;
+
+  factory _ProjectTaskDto.fromJson(Map<String, dynamic> json) =
+      _$ProjectTaskDtoImpl.fromJson;
+
+  @override
+  String get id;
+  @override
+  String get name;
+  @override
+  String? get description;
+  @override
+  String get projectId;
+  @override
+  DateTime get createdAt;
+  @override
+  DateTime get updatedAt;
+
+  /// Create a copy of ProjectTaskDto
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$ProjectTaskDtoImplCopyWith<_$ProjectTaskDtoImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+ProjectTaskCreateDto _$ProjectTaskCreateDtoFromJson(Map<String, dynamic> json) {
+  return _ProjectTaskCreateDto.fromJson(json);
+}
+
+/// @nodoc
+mixin _$ProjectTaskCreateDto {
+  String get name => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String get projectId => throw _privateConstructorUsedError;
+
+  /// Serializes this ProjectTaskCreateDto to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of ProjectTaskCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $ProjectTaskCreateDtoCopyWith<ProjectTaskCreateDto> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $ProjectTaskCreateDtoCopyWith<$Res> {
+  factory $ProjectTaskCreateDtoCopyWith(ProjectTaskCreateDto value,
+          $Res Function(ProjectTaskCreateDto) then) =
+      _$ProjectTaskCreateDtoCopyWithImpl<$Res, ProjectTaskCreateDto>;
+  @useResult
+  $Res call({String name, String? description, String projectId});
+}
+
+/// @nodoc
+class _$ProjectTaskCreateDtoCopyWithImpl<$Res,
+        $Val extends ProjectTaskCreateDto>
+    implements $ProjectTaskCreateDtoCopyWith<$Res> {
+  _$ProjectTaskCreateDtoCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of ProjectTaskCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? name = null,
+    Object? description = freezed,
+    Object? projectId = null,
+  }) {
+    return _then(_value.copyWith(
+      name: null == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$ProjectTaskCreateDtoImplCopyWith<$Res>
+    implements $ProjectTaskCreateDtoCopyWith<$Res> {
+  factory _$$ProjectTaskCreateDtoImplCopyWith(_$ProjectTaskCreateDtoImpl value,
+          $Res Function(_$ProjectTaskCreateDtoImpl) then) =
+      __$$ProjectTaskCreateDtoImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call({String name, String? description, String projectId});
+}
+
+/// @nodoc
+class __$$ProjectTaskCreateDtoImplCopyWithImpl<$Res>
+    extends _$ProjectTaskCreateDtoCopyWithImpl<$Res, _$ProjectTaskCreateDtoImpl>
+    implements _$$ProjectTaskCreateDtoImplCopyWith<$Res> {
+  __$$ProjectTaskCreateDtoImplCopyWithImpl(_$ProjectTaskCreateDtoImpl _value,
+      $Res Function(_$ProjectTaskCreateDtoImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of ProjectTaskCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? name = null,
+    Object? description = freezed,
+    Object? projectId = null,
+  }) {
+    return _then(_$ProjectTaskCreateDtoImpl(
+      name: null == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$ProjectTaskCreateDtoImpl implements _ProjectTaskCreateDto {
+  const _$ProjectTaskCreateDtoImpl(
+      {required this.name, this.description, required this.projectId});
+
+  factory _$ProjectTaskCreateDtoImpl.fromJson(Map<String, dynamic> json) =>
+      _$$ProjectTaskCreateDtoImplFromJson(json);
+
+  @override
+  final String name;
+  @override
+  final String? description;
+  @override
+  final String projectId;
+
+  @override
+  String toString() {
+    return 'ProjectTaskCreateDto(name: $name, description: $description, projectId: $projectId)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$ProjectTaskCreateDtoImpl &&
+            (identical(other.name, name) || other.name == name) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.projectId, projectId) ||
+                other.projectId == projectId));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode => Object.hash(runtimeType, name, description, projectId);
+
+  /// Create a copy of ProjectTaskCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$ProjectTaskCreateDtoImplCopyWith<_$ProjectTaskCreateDtoImpl>
+      get copyWith =>
+          __$$ProjectTaskCreateDtoImplCopyWithImpl<_$ProjectTaskCreateDtoImpl>(
+              this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$ProjectTaskCreateDtoImplToJson(
+      this,
+    );
+  }
+}
+
+abstract class _ProjectTaskCreateDto implements ProjectTaskCreateDto {
+  const factory _ProjectTaskCreateDto(
+      {required final String name,
+      final String? description,
+      required final String projectId}) = _$ProjectTaskCreateDtoImpl;
+
+  factory _ProjectTaskCreateDto.fromJson(Map<String, dynamic> json) =
+      _$ProjectTaskCreateDtoImpl.fromJson;
+
+  @override
+  String get name;
+  @override
+  String? get description;
+  @override
+  String get projectId;
+
+  /// Create a copy of ProjectTaskCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$ProjectTaskCreateDtoImplCopyWith<_$ProjectTaskCreateDtoImpl>
+      get copyWith => throw _privateConstructorUsedError;
+}
+
+ProjectTaskUpdateDto _$ProjectTaskUpdateDtoFromJson(Map<String, dynamic> json) {
+  return _ProjectTaskUpdateDto.fromJson(json);
+}
+
+/// @nodoc
+mixin _$ProjectTaskUpdateDto {
+  String? get name => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String? get projectId => throw _privateConstructorUsedError;
+
+  /// Serializes this ProjectTaskUpdateDto to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of ProjectTaskUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $ProjectTaskUpdateDtoCopyWith<ProjectTaskUpdateDto> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $ProjectTaskUpdateDtoCopyWith<$Res> {
+  factory $ProjectTaskUpdateDtoCopyWith(ProjectTaskUpdateDto value,
+          $Res Function(ProjectTaskUpdateDto) then) =
+      _$ProjectTaskUpdateDtoCopyWithImpl<$Res, ProjectTaskUpdateDto>;
+  @useResult
+  $Res call({String? name, String? description, String? projectId});
+}
+
+/// @nodoc
+class _$ProjectTaskUpdateDtoCopyWithImpl<$Res,
+        $Val extends ProjectTaskUpdateDto>
+    implements $ProjectTaskUpdateDtoCopyWith<$Res> {
+  _$ProjectTaskUpdateDtoCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of ProjectTaskUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? name = freezed,
+    Object? description = freezed,
+    Object? projectId = freezed,
+  }) {
+    return _then(_value.copyWith(
+      name: freezed == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String?,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: freezed == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String?,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$ProjectTaskUpdateDtoImplCopyWith<$Res>
+    implements $ProjectTaskUpdateDtoCopyWith<$Res> {
+  factory _$$ProjectTaskUpdateDtoImplCopyWith(_$ProjectTaskUpdateDtoImpl value,
+          $Res Function(_$ProjectTaskUpdateDtoImpl) then) =
+      __$$ProjectTaskUpdateDtoImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call({String? name, String? description, String? projectId});
+}
+
+/// @nodoc
+class __$$ProjectTaskUpdateDtoImplCopyWithImpl<$Res>
+    extends _$ProjectTaskUpdateDtoCopyWithImpl<$Res, _$ProjectTaskUpdateDtoImpl>
+    implements _$$ProjectTaskUpdateDtoImplCopyWith<$Res> {
+  __$$ProjectTaskUpdateDtoImplCopyWithImpl(_$ProjectTaskUpdateDtoImpl _value,
+      $Res Function(_$ProjectTaskUpdateDtoImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of ProjectTaskUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? name = freezed,
+    Object? description = freezed,
+    Object? projectId = freezed,
+  }) {
+    return _then(_$ProjectTaskUpdateDtoImpl(
+      name: freezed == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String?,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: freezed == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String?,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$ProjectTaskUpdateDtoImpl implements _ProjectTaskUpdateDto {
+  const _$ProjectTaskUpdateDtoImpl(
+      {this.name, this.description, this.projectId});
+
+  factory _$ProjectTaskUpdateDtoImpl.fromJson(Map<String, dynamic> json) =>
+      _$$ProjectTaskUpdateDtoImplFromJson(json);
+
+  @override
+  final String? name;
+  @override
+  final String? description;
+  @override
+  final String? projectId;
+
+  @override
+  String toString() {
+    return 'ProjectTaskUpdateDto(name: $name, description: $description, projectId: $projectId)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$ProjectTaskUpdateDtoImpl &&
+            (identical(other.name, name) || other.name == name) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.projectId, projectId) ||
+                other.projectId == projectId));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode => Object.hash(runtimeType, name, description, projectId);
+
+  /// Create a copy of ProjectTaskUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$ProjectTaskUpdateDtoImplCopyWith<_$ProjectTaskUpdateDtoImpl>
+      get copyWith =>
+          __$$ProjectTaskUpdateDtoImplCopyWithImpl<_$ProjectTaskUpdateDtoImpl>(
+              this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$ProjectTaskUpdateDtoImplToJson(
+      this,
+    );
+  }
+}
+
+abstract class _ProjectTaskUpdateDto implements ProjectTaskUpdateDto {
+  const factory _ProjectTaskUpdateDto(
+      {final String? name,
+      final String? description,
+      final String? projectId}) = _$ProjectTaskUpdateDtoImpl;
+
+  factory _ProjectTaskUpdateDto.fromJson(Map<String, dynamic> json) =
+      _$ProjectTaskUpdateDtoImpl.fromJson;
+
+  @override
+  String? get name;
+  @override
+  String? get description;
+  @override
+  String? get projectId;
+
+  /// Create a copy of ProjectTaskUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$ProjectTaskUpdateDtoImplCopyWith<_$ProjectTaskUpdateDtoImpl>
+      get copyWith => throw _privateConstructorUsedError;
+}

backend-dart/lib/application/service/dto/project_task_dto.g.dart

@@ -0,0 +1,60 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'project_task_dto.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_$ProjectTaskDtoImpl _$$ProjectTaskDtoImplFromJson(Map<String, dynamic> json) =>
+    _$ProjectTaskDtoImpl(
+      id: json['id'] as String,
+      name: json['name'] as String,
+      description: json['description'] as String?,
+      projectId: json['projectId'] as String,
+      createdAt: DateTime.parse(json['createdAt'] as String),
+      updatedAt: DateTime.parse(json['updatedAt'] as String),
+    );
+
+Map<String, dynamic> _$$ProjectTaskDtoImplToJson(
+        _$ProjectTaskDtoImpl instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'name': instance.name,
+      'description': instance.description,
+      'projectId': instance.projectId,
+      'createdAt': instance.createdAt.toIso8601String(),
+      'updatedAt': instance.updatedAt.toIso8601String(),
+    };
+
+_$ProjectTaskCreateDtoImpl _$$ProjectTaskCreateDtoImplFromJson(
+        Map<String, dynamic> json) =>
+    _$ProjectTaskCreateDtoImpl(
+      name: json['name'] as String,
+      description: json['description'] as String?,
+      projectId: json['projectId'] as String,
+    );
+
+Map<String, dynamic> _$$ProjectTaskCreateDtoImplToJson(
+        _$ProjectTaskCreateDtoImpl instance) =>
+    <String, dynamic>{
+      'name': instance.name,
+      'description': instance.description,
+      'projectId': instance.projectId,
+    };
+
+_$ProjectTaskUpdateDtoImpl _$$ProjectTaskUpdateDtoImplFromJson(
+        Map<String, dynamic> json) =>
+    _$ProjectTaskUpdateDtoImpl(
+      name: json['name'] as String?,
+      description: json['description'] as String?,
+      projectId: json['projectId'] as String?,
+    );
+
+Map<String, dynamic> _$$ProjectTaskUpdateDtoImplToJson(
+        _$ProjectTaskUpdateDtoImpl instance) =>
+    <String, dynamic>{
+      'name': instance.name,
+      'description': instance.description,
+      'projectId': instance.projectId,
+    };

backend-dart/lib/application/service/dto/time_entry_dto.dart

@@ -0,0 +1,52 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'time_entry_dto.freezed.dart';
+part 'time_entry_dto.g.dart';
+
+@freezed
+class TimeEntryDto with _$TimeEntryDto {
+  const factory TimeEntryDto({
+    required String id,
+    required DateTime startTime,
+    required DateTime endTime,
+    String? description,
+    required String userId,
+    required String projectId,
+    required DateTime createdAt,
+    required DateTime updatedAt,
+  }) = _TimeEntryDto;
+
+  /// JSON-Serialisierung
+  factory TimeEntryDto.fromJson(Map<String, dynamic> json) =>
+      _$TimeEntryDtoFromJson(json);
+}
+
+@freezed
+class TimeEntryCreateDto with _$TimeEntryCreateDto {
+  const factory TimeEntryCreateDto({
+    required DateTime startTime,
+    required DateTime endTime,
+    String? description,
+    required String userId,
+    required String projectId,
+  }) = _TimeEntryCreateDto;
+
+  /// JSON-Serialisierung
+  factory TimeEntryCreateDto.fromJson(Map<String, dynamic> json) =>
+      _$TimeEntryCreateDtoFromJson(json);
+}
+
+@freezed
+class TimeEntryUpdateDto with _$TimeEntryUpdateDto {
+  const factory TimeEntryUpdateDto({
+    DateTime? startTime,
+    DateTime? endTime,
+    String? description,
+    String? userId,
+    String? projectId,
+  }) = _TimeEntryUpdateDto;
+
+  /// JSON-Serialisierung
+  factory TimeEntryUpdateDto.fromJson(Map<String, dynamic> json) =>
+      _$TimeEntryUpdateDtoFromJson(json);
+}

backend-dart/lib/application/service/dto/time_entry_dto.freezed.dart

@@ -0,0 +1,790 @@
+// coverage:ignore-file
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint
+// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides, invalid_annotation_target, unnecessary_question_mark
+
+part of 'time_entry_dto.dart';
+
+// **************************************************************************
+// FreezedGenerator
+// **************************************************************************
+
+T _$identity<T>(T value) => value;
+
+final _privateConstructorUsedError = UnsupportedError(
+    'It seems like you constructed your class using `MyClass._()`. This constructor is only meant to be used by freezed and you are not supposed to need it nor use it.\nPlease check the documentation here for more information: https://github.com/rrousselGit/freezed#adding-getters-and-methods-to-our-models');
+
+TimeEntryDto _$TimeEntryDtoFromJson(Map<String, dynamic> json) {
+  return _TimeEntryDto.fromJson(json);
+}
+
+/// @nodoc
+mixin _$TimeEntryDto {
+  String get id => throw _privateConstructorUsedError;
+  DateTime get startTime => throw _privateConstructorUsedError;
+  DateTime get endTime => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String get userId => throw _privateConstructorUsedError;
+  String get projectId => throw _privateConstructorUsedError;
+  DateTime get createdAt => throw _privateConstructorUsedError;
+  DateTime get updatedAt => throw _privateConstructorUsedError;
+
+  /// Serializes this TimeEntryDto to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of TimeEntryDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $TimeEntryDtoCopyWith<TimeEntryDto> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $TimeEntryDtoCopyWith<$Res> {
+  factory $TimeEntryDtoCopyWith(
+          TimeEntryDto value, $Res Function(TimeEntryDto) then) =
+      _$TimeEntryDtoCopyWithImpl<$Res, TimeEntryDto>;
+  @useResult
+  $Res call(
+      {String id,
+      DateTime startTime,
+      DateTime endTime,
+      String? description,
+      String userId,
+      String projectId,
+      DateTime createdAt,
+      DateTime updatedAt});
+}
+
+/// @nodoc
+class _$TimeEntryDtoCopyWithImpl<$Res, $Val extends TimeEntryDto>
+    implements $TimeEntryDtoCopyWith<$Res> {
+  _$TimeEntryDtoCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of TimeEntryDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? startTime = null,
+    Object? endTime = null,
+    Object? description = freezed,
+    Object? userId = null,
+    Object? projectId = null,
+    Object? createdAt = null,
+    Object? updatedAt = null,
+  }) {
+    return _then(_value.copyWith(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      startTime: null == startTime
+          ? _value.startTime
+          : startTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      endTime: null == endTime
+          ? _value.endTime
+          : endTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: null == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+      createdAt: null == createdAt
+          ? _value.createdAt
+          : createdAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      updatedAt: null == updatedAt
+          ? _value.updatedAt
+          : updatedAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$TimeEntryDtoImplCopyWith<$Res>
+    implements $TimeEntryDtoCopyWith<$Res> {
+  factory _$$TimeEntryDtoImplCopyWith(
+          _$TimeEntryDtoImpl value, $Res Function(_$TimeEntryDtoImpl) then) =
+      __$$TimeEntryDtoImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call(
+      {String id,
+      DateTime startTime,
+      DateTime endTime,
+      String? description,
+      String userId,
+      String projectId,
+      DateTime createdAt,
+      DateTime updatedAt});
+}
+
+/// @nodoc
+class __$$TimeEntryDtoImplCopyWithImpl<$Res>
+    extends _$TimeEntryDtoCopyWithImpl<$Res, _$TimeEntryDtoImpl>
+    implements _$$TimeEntryDtoImplCopyWith<$Res> {
+  __$$TimeEntryDtoImplCopyWithImpl(
+      _$TimeEntryDtoImpl _value, $Res Function(_$TimeEntryDtoImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of TimeEntryDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? startTime = null,
+    Object? endTime = null,
+    Object? description = freezed,
+    Object? userId = null,
+    Object? projectId = null,
+    Object? createdAt = null,
+    Object? updatedAt = null,
+  }) {
+    return _then(_$TimeEntryDtoImpl(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      startTime: null == startTime
+          ? _value.startTime
+          : startTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      endTime: null == endTime
+          ? _value.endTime
+          : endTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: null == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+      createdAt: null == createdAt
+          ? _value.createdAt
+          : createdAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      updatedAt: null == updatedAt
+          ? _value.updatedAt
+          : updatedAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$TimeEntryDtoImpl implements _TimeEntryDto {
+  const _$TimeEntryDtoImpl(
+      {required this.id,
+      required this.startTime,
+      required this.endTime,
+      this.description,
+      required this.userId,
+      required this.projectId,
+      required this.createdAt,
+      required this.updatedAt});
+
+  factory _$TimeEntryDtoImpl.fromJson(Map<String, dynamic> json) =>
+      _$$TimeEntryDtoImplFromJson(json);
+
+  @override
+  final String id;
+  @override
+  final DateTime startTime;
+  @override
+  final DateTime endTime;
+  @override
+  final String? description;
+  @override
+  final String userId;
+  @override
+  final String projectId;
+  @override
+  final DateTime createdAt;
+  @override
+  final DateTime updatedAt;
+
+  @override
+  String toString() {
+    return 'TimeEntryDto(id: $id, startTime: $startTime, endTime: $endTime, description: $description, userId: $userId, projectId: $projectId, createdAt: $createdAt, updatedAt: $updatedAt)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$TimeEntryDtoImpl &&
+            (identical(other.id, id) || other.id == id) &&
+            (identical(other.startTime, startTime) ||
+                other.startTime == startTime) &&
+            (identical(other.endTime, endTime) || other.endTime == endTime) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.userId, userId) || other.userId == userId) &&
+            (identical(other.projectId, projectId) ||
+                other.projectId == projectId) &&
+            (identical(other.createdAt, createdAt) ||
+                other.createdAt == createdAt) &&
+            (identical(other.updatedAt, updatedAt) ||
+                other.updatedAt == updatedAt));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode => Object.hash(runtimeType, id, startTime, endTime,
+      description, userId, projectId, createdAt, updatedAt);
+
+  /// Create a copy of TimeEntryDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$TimeEntryDtoImplCopyWith<_$TimeEntryDtoImpl> get copyWith =>
+      __$$TimeEntryDtoImplCopyWithImpl<_$TimeEntryDtoImpl>(this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$TimeEntryDtoImplToJson(
+      this,
+    );
+  }
+}
+
+abstract class _TimeEntryDto implements TimeEntryDto {
+  const factory _TimeEntryDto(
+      {required final String id,
+      required final DateTime startTime,
+      required final DateTime endTime,
+      final String? description,
+      required final String userId,
+      required final String projectId,
+      required final DateTime createdAt,
+      required final DateTime updatedAt}) = _$TimeEntryDtoImpl;
+
+  factory _TimeEntryDto.fromJson(Map<String, dynamic> json) =
+      _$TimeEntryDtoImpl.fromJson;
+
+  @override
+  String get id;
+  @override
+  DateTime get startTime;
+  @override
+  DateTime get endTime;
+  @override
+  String? get description;
+  @override
+  String get userId;
+  @override
+  String get projectId;
+  @override
+  DateTime get createdAt;
+  @override
+  DateTime get updatedAt;
+
+  /// Create a copy of TimeEntryDto
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$TimeEntryDtoImplCopyWith<_$TimeEntryDtoImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+TimeEntryCreateDto _$TimeEntryCreateDtoFromJson(Map<String, dynamic> json) {
+  return _TimeEntryCreateDto.fromJson(json);
+}
+
+/// @nodoc
+mixin _$TimeEntryCreateDto {
+  DateTime get startTime => throw _privateConstructorUsedError;
+  DateTime get endTime => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String get userId => throw _privateConstructorUsedError;
+  String get projectId => throw _privateConstructorUsedError;
+
+  /// Serializes this TimeEntryCreateDto to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of TimeEntryCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $TimeEntryCreateDtoCopyWith<TimeEntryCreateDto> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $TimeEntryCreateDtoCopyWith<$Res> {
+  factory $TimeEntryCreateDtoCopyWith(
+          TimeEntryCreateDto value, $Res Function(TimeEntryCreateDto) then) =
+      _$TimeEntryCreateDtoCopyWithImpl<$Res, TimeEntryCreateDto>;
+  @useResult
+  $Res call(
+      {DateTime startTime,
+      DateTime endTime,
+      String? description,
+      String userId,
+      String projectId});
+}
+
+/// @nodoc
+class _$TimeEntryCreateDtoCopyWithImpl<$Res, $Val extends TimeEntryCreateDto>
+    implements $TimeEntryCreateDtoCopyWith<$Res> {
+  _$TimeEntryCreateDtoCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of TimeEntryCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? startTime = null,
+    Object? endTime = null,
+    Object? description = freezed,
+    Object? userId = null,
+    Object? projectId = null,
+  }) {
+    return _then(_value.copyWith(
+      startTime: null == startTime
+          ? _value.startTime
+          : startTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      endTime: null == endTime
+          ? _value.endTime
+          : endTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: null == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$TimeEntryCreateDtoImplCopyWith<$Res>
+    implements $TimeEntryCreateDtoCopyWith<$Res> {
+  factory _$$TimeEntryCreateDtoImplCopyWith(_$TimeEntryCreateDtoImpl value,
+          $Res Function(_$TimeEntryCreateDtoImpl) then) =
+      __$$TimeEntryCreateDtoImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call(
+      {DateTime startTime,
+      DateTime endTime,
+      String? description,
+      String userId,
+      String projectId});
+}
+
+/// @nodoc
+class __$$TimeEntryCreateDtoImplCopyWithImpl<$Res>
+    extends _$TimeEntryCreateDtoCopyWithImpl<$Res, _$TimeEntryCreateDtoImpl>
+    implements _$$TimeEntryCreateDtoImplCopyWith<$Res> {
+  __$$TimeEntryCreateDtoImplCopyWithImpl(_$TimeEntryCreateDtoImpl _value,
+      $Res Function(_$TimeEntryCreateDtoImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of TimeEntryCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? startTime = null,
+    Object? endTime = null,
+    Object? description = freezed,
+    Object? userId = null,
+    Object? projectId = null,
+  }) {
+    return _then(_$TimeEntryCreateDtoImpl(
+      startTime: null == startTime
+          ? _value.startTime
+          : startTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      endTime: null == endTime
+          ? _value.endTime
+          : endTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: null == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$TimeEntryCreateDtoImpl implements _TimeEntryCreateDto {
+  const _$TimeEntryCreateDtoImpl(
+      {required this.startTime,
+      required this.endTime,
+      this.description,
+      required this.userId,
+      required this.projectId});
+
+  factory _$TimeEntryCreateDtoImpl.fromJson(Map<String, dynamic> json) =>
+      _$$TimeEntryCreateDtoImplFromJson(json);
+
+  @override
+  final DateTime startTime;
+  @override
+  final DateTime endTime;
+  @override
+  final String? description;
+  @override
+  final String userId;
+  @override
+  final String projectId;
+
+  @override
+  String toString() {
+    return 'TimeEntryCreateDto(startTime: $startTime, endTime: $endTime, description: $description, userId: $userId, projectId: $projectId)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$TimeEntryCreateDtoImpl &&
+            (identical(other.startTime, startTime) ||
+                other.startTime == startTime) &&
+            (identical(other.endTime, endTime) || other.endTime == endTime) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.userId, userId) || other.userId == userId) &&
+            (identical(other.projectId, projectId) ||
+                other.projectId == projectId));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode => Object.hash(
+      runtimeType, startTime, endTime, description, userId, projectId);
+
+  /// Create a copy of TimeEntryCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$TimeEntryCreateDtoImplCopyWith<_$TimeEntryCreateDtoImpl> get copyWith =>
+      __$$TimeEntryCreateDtoImplCopyWithImpl<_$TimeEntryCreateDtoImpl>(
+          this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$TimeEntryCreateDtoImplToJson(
+      this,
+    );
+  }
+}
+
+abstract class _TimeEntryCreateDto implements TimeEntryCreateDto {
+  const factory _TimeEntryCreateDto(
+      {required final DateTime startTime,
+      required final DateTime endTime,
+      final String? description,
+      required final String userId,
+      required final String projectId}) = _$TimeEntryCreateDtoImpl;
+
+  factory _TimeEntryCreateDto.fromJson(Map<String, dynamic> json) =
+      _$TimeEntryCreateDtoImpl.fromJson;
+
+  @override
+  DateTime get startTime;
+  @override
+  DateTime get endTime;
+  @override
+  String? get description;
+  @override
+  String get userId;
+  @override
+  String get projectId;
+
+  /// Create a copy of TimeEntryCreateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$TimeEntryCreateDtoImplCopyWith<_$TimeEntryCreateDtoImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+TimeEntryUpdateDto _$TimeEntryUpdateDtoFromJson(Map<String, dynamic> json) {
+  return _TimeEntryUpdateDto.fromJson(json);
+}
+
+/// @nodoc
+mixin _$TimeEntryUpdateDto {
+  DateTime? get startTime => throw _privateConstructorUsedError;
+  DateTime? get endTime => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String? get userId => throw _privateConstructorUsedError;
+  String? get projectId => throw _privateConstructorUsedError;
+
+  /// Serializes this TimeEntryUpdateDto to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of TimeEntryUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $TimeEntryUpdateDtoCopyWith<TimeEntryUpdateDto> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $TimeEntryUpdateDtoCopyWith<$Res> {
+  factory $TimeEntryUpdateDtoCopyWith(
+          TimeEntryUpdateDto value, $Res Function(TimeEntryUpdateDto) then) =
+      _$TimeEntryUpdateDtoCopyWithImpl<$Res, TimeEntryUpdateDto>;
+  @useResult
+  $Res call(
+      {DateTime? startTime,
+      DateTime? endTime,
+      String? description,
+      String? userId,
+      String? projectId});
+}
+
+/// @nodoc
+class _$TimeEntryUpdateDtoCopyWithImpl<$Res, $Val extends TimeEntryUpdateDto>
+    implements $TimeEntryUpdateDtoCopyWith<$Res> {
+  _$TimeEntryUpdateDtoCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of TimeEntryUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? startTime = freezed,
+    Object? endTime = freezed,
+    Object? description = freezed,
+    Object? userId = freezed,
+    Object? projectId = freezed,
+  }) {
+    return _then(_value.copyWith(
+      startTime: freezed == startTime
+          ? _value.startTime
+          : startTime // ignore: cast_nullable_to_non_nullable
+              as DateTime?,
+      endTime: freezed == endTime
+          ? _value.endTime
+          : endTime // ignore: cast_nullable_to_non_nullable
+              as DateTime?,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: freezed == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: freezed == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String?,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$TimeEntryUpdateDtoImplCopyWith<$Res>
+    implements $TimeEntryUpdateDtoCopyWith<$Res> {
+  factory _$$TimeEntryUpdateDtoImplCopyWith(_$TimeEntryUpdateDtoImpl value,
+          $Res Function(_$TimeEntryUpdateDtoImpl) then) =
+      __$$TimeEntryUpdateDtoImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call(
+      {DateTime? startTime,
+      DateTime? endTime,
+      String? description,
+      String? userId,
+      String? projectId});
+}
+
+/// @nodoc
+class __$$TimeEntryUpdateDtoImplCopyWithImpl<$Res>
+    extends _$TimeEntryUpdateDtoCopyWithImpl<$Res, _$TimeEntryUpdateDtoImpl>
+    implements _$$TimeEntryUpdateDtoImplCopyWith<$Res> {
+  __$$TimeEntryUpdateDtoImplCopyWithImpl(_$TimeEntryUpdateDtoImpl _value,
+      $Res Function(_$TimeEntryUpdateDtoImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of TimeEntryUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? startTime = freezed,
+    Object? endTime = freezed,
+    Object? description = freezed,
+    Object? userId = freezed,
+    Object? projectId = freezed,
+  }) {
+    return _then(_$TimeEntryUpdateDtoImpl(
+      startTime: freezed == startTime
+          ? _value.startTime
+          : startTime // ignore: cast_nullable_to_non_nullable
+              as DateTime?,
+      endTime: freezed == endTime
+          ? _value.endTime
+          : endTime // ignore: cast_nullable_to_non_nullable
+              as DateTime?,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: freezed == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: freezed == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String?,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$TimeEntryUpdateDtoImpl implements _TimeEntryUpdateDto {
+  const _$TimeEntryUpdateDtoImpl(
+      {this.startTime,
+      this.endTime,
+      this.description,
+      this.userId,
+      this.projectId});
+
+  factory _$TimeEntryUpdateDtoImpl.fromJson(Map<String, dynamic> json) =>
+      _$$TimeEntryUpdateDtoImplFromJson(json);
+
+  @override
+  final DateTime? startTime;
+  @override
+  final DateTime? endTime;
+  @override
+  final String? description;
+  @override
+  final String? userId;
+  @override
+  final String? projectId;
+
+  @override
+  String toString() {
+    return 'TimeEntryUpdateDto(startTime: $startTime, endTime: $endTime, description: $description, userId: $userId, projectId: $projectId)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$TimeEntryUpdateDtoImpl &&
+            (identical(other.startTime, startTime) ||
+                other.startTime == startTime) &&
+            (identical(other.endTime, endTime) || other.endTime == endTime) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.userId, userId) || other.userId == userId) &&
+            (identical(other.projectId, projectId) ||
+                other.projectId == projectId));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode => Object.hash(
+      runtimeType, startTime, endTime, description, userId, projectId);
+
+  /// Create a copy of TimeEntryUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$TimeEntryUpdateDtoImplCopyWith<_$TimeEntryUpdateDtoImpl> get copyWith =>
+      __$$TimeEntryUpdateDtoImplCopyWithImpl<_$TimeEntryUpdateDtoImpl>(
+          this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$TimeEntryUpdateDtoImplToJson(
+      this,
+    );
+  }
+}
+
+abstract class _TimeEntryUpdateDto implements TimeEntryUpdateDto {
+  const factory _TimeEntryUpdateDto(
+      {final DateTime? startTime,
+      final DateTime? endTime,
+      final String? description,
+      final String? userId,
+      final String? projectId}) = _$TimeEntryUpdateDtoImpl;
+
+  factory _TimeEntryUpdateDto.fromJson(Map<String, dynamic> json) =
+      _$TimeEntryUpdateDtoImpl.fromJson;
+
+  @override
+  DateTime? get startTime;
+  @override
+  DateTime? get endTime;
+  @override
+  String? get description;
+  @override
+  String? get userId;
+  @override
+  String? get projectId;
+
+  /// Create a copy of TimeEntryUpdateDto
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$TimeEntryUpdateDtoImplCopyWith<_$TimeEntryUpdateDtoImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}

backend-dart/lib/application/service/dto/time_entry_dto.g.dart

@@ -0,0 +1,75 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'time_entry_dto.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_$TimeEntryDtoImpl _$$TimeEntryDtoImplFromJson(Map<String, dynamic> json) =>
+    _$TimeEntryDtoImpl(
+      id: json['id'] as String,
+      startTime: DateTime.parse(json['startTime'] as String),
+      endTime: DateTime.parse(json['endTime'] as String),
+      description: json['description'] as String?,
+      userId: json['userId'] as String,
+      projectId: json['projectId'] as String,
+      createdAt: DateTime.parse(json['createdAt'] as String),
+      updatedAt: DateTime.parse(json['updatedAt'] as String),
+    );
+
+Map<String, dynamic> _$$TimeEntryDtoImplToJson(_$TimeEntryDtoImpl instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'startTime': instance.startTime.toIso8601String(),
+      'endTime': instance.endTime.toIso8601String(),
+      'description': instance.description,
+      'userId': instance.userId,
+      'projectId': instance.projectId,
+      'createdAt': instance.createdAt.toIso8601String(),
+      'updatedAt': instance.updatedAt.toIso8601String(),
+    };
+
+_$TimeEntryCreateDtoImpl _$$TimeEntryCreateDtoImplFromJson(
+        Map<String, dynamic> json) =>
+    _$TimeEntryCreateDtoImpl(
+      startTime: DateTime.parse(json['startTime'] as String),
+      endTime: DateTime.parse(json['endTime'] as String),
+      description: json['description'] as String?,
+      userId: json['userId'] as String,
+      projectId: json['projectId'] as String,
+    );
+
+Map<String, dynamic> _$$TimeEntryCreateDtoImplToJson(
+        _$TimeEntryCreateDtoImpl instance) =>
+    <String, dynamic>{
+      'startTime': instance.startTime.toIso8601String(),
+      'endTime': instance.endTime.toIso8601String(),
+      'description': instance.description,
+      'userId': instance.userId,
+      'projectId': instance.projectId,
+    };
+
+_$TimeEntryUpdateDtoImpl _$$TimeEntryUpdateDtoImplFromJson(
+        Map<String, dynamic> json) =>
+    _$TimeEntryUpdateDtoImpl(
+      startTime: json['startTime'] == null
+          ? null
+          : DateTime.parse(json['startTime'] as String),
+      endTime: json['endTime'] == null
+          ? null
+          : DateTime.parse(json['endTime'] as String),
+      description: json['description'] as String?,
+      userId: json['userId'] as String?,
+      projectId: json['projectId'] as String?,
+    );
+
+Map<String, dynamic> _$$TimeEntryUpdateDtoImplToJson(
+        _$TimeEntryUpdateDtoImpl instance) =>
+    <String, dynamic>{
+      'startTime': instance.startTime?.toIso8601String(),
+      'endTime': instance.endTime?.toIso8601String(),
+      'description': instance.description,
+      'userId': instance.userId,
+      'projectId': instance.projectId,
+    };

backend-dart/lib/application/service/mapper/project_dto_mapper.dart

@@ -0,0 +1,38 @@
+import 'package:backend_dart/application/service/dto/project_dto.dart';
+import 'package:backend_dart/domain/entities/project.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+import 'package:fpdart/fpdart.dart';
+
+class ProjectDtoMapper {
+  TaskEither<IError, ProjectDto> to(Project entity) => TaskEither.of(ProjectDto(
+        id: entity.id,
+        name: entity.name,
+        description: entity.description,
+        clientId: entity.clientId,
+        userId: entity.userId,
+        createdAt: entity.createdAt,
+        updatedAt: entity.updatedAt,
+      ));
+
+  TaskEither<IError, List<ProjectDto>> listTo(Iterable<Project> origins) {
+    return TaskEither.traverseList(origins.toList(), to);
+  }
+
+  TaskEither<IError, ProjectCreate> fromCreateTo(ProjectCreateDto origin) =>
+      TaskEither.of(ProjectCreate(
+        name: origin.name,
+        description: origin.description,
+        clientId: origin.clientId,
+        userId: origin.userId,
+      ));
+
+  TaskEither<IError, ProjectUpdate> fromUpdateTo(
+          ProjectUpdateDto origin, String id) =>
+      TaskEither.of(ProjectUpdate(
+        id: id,
+        name: origin.name,
+        description: origin.description,
+        clientId: origin.clientId,
+        userId: origin.userId,
+      ));
+}

backend-dart/lib/application/service/mapper/project_task_dto_mapper.dart

@@ -0,0 +1,38 @@
+import 'package:backend_dart/application/service/dto/project_task_dto.dart';
+import 'package:backend_dart/domain/entities/project_task.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+import 'package:fpdart/fpdart.dart';
+
+class ProjectTaskDtoMapper {
+  TaskEither<IError, ProjectTaskDto> to(ProjectTask entity) =>
+      TaskEither.of(ProjectTaskDto(
+        id: entity.id,
+        name: entity.name,
+        description: entity.description,
+        projectId: entity.projectId,
+        createdAt: entity.createdAt,
+        updatedAt: entity.updatedAt,
+      ));
+
+  TaskEither<IError, List<ProjectTaskDto>> listTo(
+      Iterable<ProjectTask> origins) {
+    return TaskEither.traverseList(origins.toList(), to);
+  }
+
+  TaskEither<IError, ProjectTaskCreate> fromCreateTo(
+          ProjectTaskCreateDto origin) =>
+      TaskEither.of(ProjectTaskCreate(
+        name: origin.name,
+        description: origin.description,
+        projectId: origin.projectId,
+      ));
+
+  TaskEither<IError, ProjectTaskUpdate> fromUpdateTo(
+      ProjectTaskUpdateDto origin, String id) =>
+      TaskEither.of(ProjectTaskUpdate(
+        id: id,
+        name: origin.name,
+        description: origin.description,
+        projectId: origin.projectId,
+      ));
+}

backend-dart/lib/application/service/mapper/time_entry_dto_mapper.dart

@@ -0,0 +1,43 @@
+import 'package:backend_dart/application/service/dto/time_entry_dto.dart';
+import 'package:backend_dart/domain/entities/time_entry.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+import 'package:fpdart/fpdart.dart';
+
+class TimeEntryDtoMapper {
+  TaskEither<IError, TimeEntryDto> to(TimeEntry entity) => TaskEither.of(
+        TimeEntryDto(
+          id: entity.id,
+          startTime: entity.startTime,
+          endTime: entity.endTime,
+          description: entity.description,
+          userId: entity.userId,
+          projectId: entity.projectId,
+          createdAt: entity.createdAt,
+          updatedAt: entity.updatedAt,
+        ),
+      );
+
+  TaskEither<IError, List<TimeEntryDto>> listTo(Iterable<TimeEntry> origins) {
+    return TaskEither.traverseList(origins.toList(), to);
+  }
+
+  TaskEither<IError, TimeEntryCreate> fromCreateTo(TimeEntryCreateDto origin) =>
+      TaskEither.of(TimeEntryCreate(
+        startTime: origin.startTime,
+        endTime: origin.endTime,
+        description: origin.description,
+        userId: origin.userId,
+        projectId: origin.projectId,
+      ));
+
+  TaskEither<IError, TimeEntryUpdate> fromUpdateTo(
+          TimeEntryUpdateDto origin, String id) =>
+      TaskEither.of(TimeEntryUpdate(
+        id: id,
+        startTime: origin.startTime,
+        endTime: origin.endTime,
+        description: origin.description,
+        userId: origin.userId,
+        projectId: origin.projectId,
+      ));
+}

backend-dart/lib/application/service/mapper/user_dto_mapper.dart

@@ -1,11 +1,9 @@
 import 'package:backend_dart/application/service/dto/user_dto.dart';
 import 'package:backend_dart/domain/entities/user.dart';
 import 'package:backend_dart/domain/interface/error.dart';
-import 'package:backend_dart/domain/interface/mapper.dart';
 import 'package:fpdart/fpdart.dart';
 
-class UserDtoMapper implements IMapper<User, UserDto> {
+class UserDtoMapper {
-  @override
   TaskEither<IError, UserDto> to(User entity) => TaskEither.of(UserDto(
         id: entity.id,
         name: entity.name,
@@ -13,21 +11,7 @@ class UserDtoMapper implements IMapper<User, UserDto> {
         createdAt: entity.createdAt,
         updatedAt: entity.updatedAt,
       ));
-  @override
-  TaskEither<IError, User> from(UserDto dto) => TaskEither.of(User(
-        id: dto.id,
-        name: dto.name,
-        email: dto.email,
-        createdAt: dto.createdAt,
-        updatedAt: dto.updatedAt,
-      ));
 
-  @override
-  TaskEither<IError, List<User>> listFrom(Iterable<UserDto> targets) {
-    return TaskEither.traverseList(targets.toList(), from);
-  }
-
-  @override
   TaskEither<IError, List<UserDto>> listTo(Iterable<User> origins) {
     return TaskEither.traverseList(origins.toList(), to);
   }

backend-dart/lib/application/service/project_service.dart

@@ -0,0 +1,78 @@
+import 'dart:convert';
+
+import 'package:backend_dart/application/service/dto/project_dto.dart';
+import 'package:backend_dart/application/service/mapper/project_dto_mapper.dart';
+import 'package:backend_dart/common/request_helper.dart';
+import 'package:backend_dart/common/response_helpers.dart';
+import 'package:backend_dart/common/validation.dart';
+import 'package:backend_dart/domain/repository/project_repository.dart';
+import 'package:shelf/shelf.dart';
+import 'package:shelf_router/shelf_router.dart';
+
+part 'project_service.g.dart'; // generated with 'pub run build_runner build'
+
+class ProjectService {
+  final ProjectRepository projects;
+  final ProjectDtoMapper mapper = ProjectDtoMapper();
+  ProjectService(this.projects);
+
+  @Route.get('/')
+  Future<Response> listProjects(Request request) async {
+    return projects
+        .findAll()
+        .flatMap(mapper.listTo)
+        .map((projects) => projects.map((project) => project.toJson()).toList())
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => Response.ok(jsonEncode(right)))
+        .run();
+  }
+
+  @Route.get('/<projectId>')
+  Future<Response> fetchProject(Request request, String projectId) async {
+    return projects
+        .findById(projectId)
+        .flatMap(mapper.to)
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => ResponseHelpers.jsonOk(right.toJson()))
+        .run();
+  }
+
+  @Route.post('/')
+  Future<Response> createProject(Request request) async {
+    return requestToJson(request)
+        .flatMap((json) =>
+            validateJsonKeys(json, ['name', 'userId'])) // Add required fields
+        .flatMap((json) => decodeJson(json, ProjectCreateDto.fromJson))
+        .flatMap(mapper.fromCreateTo)
+        .flatMap(projects.create)
+        .flatMap(mapper.to)
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => ResponseHelpers.jsonOk(right.toJson()))
+        .run();
+  }
+
+  @Route.put('/<projectId>')
+  Future<Response> updateProject(Request request, String projectId) async {
+    return requestToJson(request)
+        .flatMap((json) => validateJsonKeys(json, []))
+        .flatMap((json) => decodeJson(json, ProjectUpdateDto.fromJson))
+        .flatMap((dto) => mapper.fromUpdateTo(dto, projectId))
+        .flatMap(projects.update)
+        .flatMap(mapper.to)
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => ResponseHelpers.jsonOk(right.toJson()))
+        .run();
+  }
+
+  @Route.delete('/<projectId>')
+  Future<Response> deleteProject(Request request, String projectId) async {
+    return projects
+        .delete(projectId)
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => Response.ok('project deleted'))
+        .run();
+  }
+
+  // Create router using the generate function defined in 'project_service.g.dart'.
+  Router get router => _$ProjectServiceRouter(this);
+}

backend-dart/lib/application/service/project_service.g.dart

@@ -0,0 +1,37 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'project_service.dart';
+
+// **************************************************************************
+// ShelfRouterGenerator
+// **************************************************************************
+
+Router _$ProjectServiceRouter(ProjectService service) {
+  final router = Router();
+  router.add(
+    'GET',
+    r'/',
+    service.listProjects,
+  );
+  router.add(
+    'GET',
+    r'/<projectId>',
+    service.fetchProject,
+  );
+  router.add(
+    'POST',
+    r'/',
+    service.createProject,
+  );
+  router.add(
+    'PUT',
+    r'/<projectId>',
+    service.updateProject,
+  );
+  router.add(
+    'DELETE',
+    r'/<projectId>',
+    service.deleteProject,
+  );
+  return router;
+}

backend-dart/lib/application/service/project_task_service.dart

@@ -0,0 +1,77 @@
+import 'dart:convert';
+
+import 'package:backend_dart/application/service/dto/project_task_dto.dart';
+import 'package:backend_dart/application/service/mapper/project_task_dto_mapper.dart';
+import 'package:backend_dart/common/request_helper.dart';
+import 'package:backend_dart/common/response_helpers.dart';
+import 'package:backend_dart/common/validation.dart';
+import 'package:backend_dart/domain/repository/project_task_repository.dart';
+import 'package:shelf/shelf.dart';
+import 'package:shelf_router/shelf_router.dart';
+
+part 'project_task_service.g.dart'; // Generated with 'pub run build_runner build'
+
+class ProjectTaskService {
+  final ProjectTaskRepository tasks;
+  final ProjectTaskDtoMapper mapper = ProjectTaskDtoMapper();
+  ProjectTaskService(this.tasks);
+
+  @Route.get('/')
+  Future<Response> listTasks(Request request) async {
+    return tasks
+        .findAll()
+        .flatMap(mapper.listTo)
+        .map((tasks) => tasks.map((task) => task.toJson()).toList())
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => Response.ok(jsonEncode(right)))
+        .run();
+  }
+
+  @Route.get('/<taskId>')
+  Future<Response> fetchTask(Request request, String taskId) async {
+    return tasks
+        .findById(taskId)
+        .flatMap(mapper.to)
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => ResponseHelpers.jsonOk(right.toJson()))
+        .run();
+  }
+
+  @Route.post('/')
+  Future<Response> createTask(Request request) async {
+    return requestToJson(request)
+        .flatMap((json) =>
+            validateJsonKeys(json, ['name', 'projectId'])) // Add required fields
+        .flatMap((json) => decodeJson(json, ProjectTaskCreateDto.fromJson))
+        .flatMap(mapper.fromCreateTo)
+        .flatMap(tasks.create)
+        .flatMap(mapper.to)
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => ResponseHelpers.jsonOk(right.toJson()))
+        .run();
+  }
+
+  @Route.put('/<taskId>')
+  Future<Response> updateTask(Request request, String taskId) async {
+    return requestToJson(request)
+        .flatMap((json) => validateJsonKeys(json, []))
+        .flatMap((json) => decodeJson(json, ProjectTaskUpdateDto.fromJson))
+        .flatMap((dto) => mapper.fromUpdateTo(dto, taskId))
+        .flatMap(tasks.update)
+        .flatMap(mapper.to)
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => ResponseHelpers.jsonOk(right.toJson()))
+        .run();
+  }
+
+  @Route.delete('/<taskId>')
+  Future<Response> deleteTask(Request request, String taskId) async {
+    return tasks
+        .delete(taskId)
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => Response.ok('Task deleted'))
+        .run();
+  }
+
+  Router get router => _$ProjectTaskServiceRouter(this);
+}

backend-dart/lib/application/service/project_task_service.g.dart

@@ -0,0 +1,37 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'project_task_service.dart';
+
+// **************************************************************************
+// ShelfRouterGenerator
+// **************************************************************************
+
+Router _$ProjectTaskServiceRouter(ProjectTaskService service) {
+  final router = Router();
+  router.add(
+    'GET',
+    r'/',
+    service.listTasks,
+  );
+  router.add(
+    'GET',
+    r'/<taskId>',
+    service.fetchTask,
+  );
+  router.add(
+    'POST',
+    r'/',
+    service.createTask,
+  );
+  router.add(
+    'PUT',
+    r'/<taskId>',
+    service.updateTask,
+  );
+  router.add(
+    'DELETE',
+    r'/<taskId>',
+    service.deleteTask,
+  );
+  return router;
+}

backend-dart/lib/application/service/service_provider.dart

@@ -0,0 +1,26 @@
+import 'package:backend_dart/application/repository/provider.dart';
+import 'package:backend_dart/application/service/project_service.dart';
+import 'package:backend_dart/application/service/project_task_service.dart';
+import 'package:backend_dart/application/service/time_entry_service.dart';
+import 'package:backend_dart/application/service/user_service.dart';
+import 'package:riverpod/riverpod.dart';
+
+final userServiceProvider = Provider<UserService>((ref) {
+  final database = ref.read(userRepoProvider);
+  return UserService(database);
+});
+
+final projectServiceProvider = Provider<ProjectService>((ref) {
+  final database = ref.read(projectProvider);
+  return ProjectService(database);
+});
+
+final projectTaskServiceProvider = Provider<ProjectTaskService>((ref) {
+  final database = ref.read(projectTaskProvider);
+  return ProjectTaskService(database);
+});
+
+final timeEntryServiceProvider = Provider<TimeEntryService>((ref) {
+  final database = ref.read(timeEntryProvider);
+  return TimeEntryService(database);
+});

backend-dart/lib/application/service/time_entry_service.dart

@@ -0,0 +1,77 @@
+import 'dart:convert';
+
+import 'package:backend_dart/application/service/dto/time_entry_dto.dart';
+import 'package:backend_dart/application/service/mapper/time_entry_dto_mapper.dart';
+import 'package:backend_dart/common/request_helper.dart';
+import 'package:backend_dart/common/response_helpers.dart';
+import 'package:backend_dart/common/validation.dart';
+import 'package:backend_dart/domain/repository/time_entry_repository.dart';
+import 'package:shelf/shelf.dart';
+import 'package:shelf_router/shelf_router.dart';
+
+part 'time_entry_service.g.dart'; // Generated with 'pub run build_runner build'
+
+class TimeEntryService {
+  final TimeEntryRepository entries;
+  final TimeEntryDtoMapper mapper = TimeEntryDtoMapper();
+  TimeEntryService(this.entries);
+
+  @Route.get('/')
+  Future<Response> listEntries(Request request) async {
+    return entries
+        .findAll()
+        .flatMap(mapper.listTo)
+        .map((entries) => entries.map((entry) => entry.toJson()).toList())
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => Response.ok(jsonEncode(right)))
+        .run();
+  }
+
+  @Route.get('/<entryId>')
+  Future<Response> fetchEntry(Request request, String entryId) async {
+    return entries
+        .findById(entryId)
+        .flatMap(mapper.to)
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => ResponseHelpers.jsonOk(right.toJson()))
+        .run();
+  }
+
+  @Route.post('/')
+  Future<Response> createEntry(Request request) async {
+    return requestToJson(request)
+        .flatMap((json) => validateJsonKeys(
+            json, ['startTime', 'endTime', 'userId', 'projectId']))
+        .flatMap((json) => decodeJson(json, TimeEntryCreateDto.fromJson))
+        .flatMap(mapper.fromCreateTo)
+        .flatMap(entries.create)
+        .flatMap(mapper.to)
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => ResponseHelpers.jsonOk(right.toJson()))
+        .run();
+  }
+
+  @Route.put('/<entryId>')
+  Future<Response> updateEntry(Request request, String entryId) async {
+    return requestToJson(request)
+        .flatMap((json) => validateJsonKeys(json, []))
+        .flatMap((json) => decodeJson(json, TimeEntryUpdateDto.fromJson))
+        .flatMap((dto) => mapper.fromUpdateTo(dto, entryId))
+        .flatMap(entries.update)
+        .flatMap(mapper.to)
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => ResponseHelpers.jsonOk(right.toJson()))
+        .run();
+  }
+
+  @Route.delete('/<entryId>')
+  Future<Response> deleteEntry(Request request, String entryId) async {
+    return entries
+        .delete(entryId)
+        .match((left) => ResponseHelpers.fromError(left),
+            (right) => Response.ok('Entry deleted'))
+        .run();
+  }
+
+  Router get router => _$TimeEntryServiceRouter(this);
+}

backend-dart/lib/application/service/time_entry_service.g.dart

@@ -0,0 +1,37 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'time_entry_service.dart';
+
+// **************************************************************************
+// ShelfRouterGenerator
+// **************************************************************************
+
+Router _$TimeEntryServiceRouter(TimeEntryService service) {
+  final router = Router();
+  router.add(
+    'GET',
+    r'/',
+    service.listEntries,
+  );
+  router.add(
+    'GET',
+    r'/<entryId>',
+    service.fetchEntry,
+  );
+  router.add(
+    'POST',
+    r'/',
+    service.createEntry,
+  );
+  router.add(
+    'PUT',
+    r'/<entryId>',
+    service.updateEntry,
+  );
+  router.add(
+    'DELETE',
+    r'/<entryId>',
+    service.deleteEntry,
+  );
+  return router;
+}

backend-dart/lib/application/service/user_service_provider.dart

@@ -1,8 +0,0 @@
-import 'package:backend_dart/application/repository/provider.dart';
-import 'package:backend_dart/application/service/user_service.dart';
-import 'package:riverpod/riverpod.dart';
-
-final userServiceProvider = Provider<UserService>((ref) {
-  final database = ref.read(userRepoProvider);
-  return UserService(database);
-});

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

@@ -1,6 +1,13 @@
+import 'package:backend_dart/domain/data/project_data_source.dart';
+import 'package:backend_dart/domain/data/project_task_data_source.dart';
+import 'package:backend_dart/domain/data/time_entry_data_source.dart';
 import 'package:backend_dart/domain/data/user_data_source.dart';
 
 abstract class IDatabase {
   UserDataSource get users;
+  TimeEntryDataSource get timeEntries;
+  ProjectTaskDataSource get tasks;
+  ProjectDataSource get projects;
+
   Future<void> close();
 }

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

@@ -7,30 +7,33 @@ abstract class ProjectDataSource {
   /// Creates a new project in the data source.
   ///
   /// Throws an error if the creation fails.
-  TaskEither<IError, Project> createProject(ProjectCreate project);
+  TaskEither<IError, Project> create(ProjectCreate project);
 
   /// Retrieves a project by its unique ID.
   ///
   /// Returns `null` if no project is found.
-  TaskEither<IError, Project>  findProjectById(String id);
+  TaskEither<IError, Project> findById(String id);
 
   /// Retrieves all projects associated with a specific user.
   ///
   /// Returns an empty list if no projects are found.
-  TaskEither<IError,List<Project>> findProjectsByUserId(String userId);
+  TaskEither<IError, List<Project>> findByUserId(String userId);
 
   /// Updates an existing project in the data source.
   ///
   /// Throws an error if the update fails.
-  TaskEither<IError, Project> updateProject(ProjectUpdate project);
+  TaskEither<IError, Project> update(ProjectUpdate project);
 
   /// Deletes a project by its unique ID.
   ///
   /// Throws an error if the deletion fails.
-  TaskEither<IError, Project>  deleteProject(String id);
+  TaskEither<IError, Project> delete(String id);
 
   /// Retrieves all projects in the data source.
   ///
   /// Returns an empty list if no projects exist.
-  TaskEither<IError, List<Project>> findAllProjects();
+  TaskEither<IError, List<Project>> findAll();
+
+  /// Generates a new unique ID for a task.
+  TaskEither<IError, String> generateId();
 }

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

@@ -0,0 +1,39 @@
+import 'package:backend_dart/domain/entities/project_task.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+import 'package:fpdart/fpdart.dart';
+
+/// Interface for managing task data interactions.
+abstract class ProjectTaskDataSource {
+  /// Creates a new task in the data source.
+  ///
+  /// Throws an error if the creation fails.
+  TaskEither<IError, ProjectTask> create(ProjectTaskCreate task);
+
+  /// Retrieves a task by its unique ID.
+  ///
+  /// Returns `null` if no task is found.
+  TaskEither<IError, ProjectTask> findById(String id);
+
+  /// Retrieves all tasks for a specific project.
+  ///
+  /// Returns an empty list if no tasks are found.
+  TaskEither<IError, List<ProjectTask>> findByProjectId(String projectId);
+
+  /// Updates an existing task in the data source.
+  ///
+  /// Throws an error if the update fails.
+  TaskEither<IError, ProjectTask> update(ProjectTaskUpdate task);
+
+  /// Deletes a task by its unique ID.
+  ///
+  /// Throws an error if the deletion fails.
+  TaskEither<IError, ProjectTask> delete(String id);
+
+  /// Retrieves all tasks in the data source.
+  ///
+  /// Returns an empty list if no tasks exist.
+  TaskEither<IError, List<ProjectTask>> findAll();
+
+  /// Generates a new unique ID for a task.
+  TaskEither<IError, String> generateId();
+}

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

@@ -0,0 +1,44 @@
+import 'package:backend_dart/domain/entities/time_entry.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+import 'package:fpdart/fpdart.dart';
+
+/// Interface for managing time entry data interactions.
+abstract class TimeEntryDataSource {
+  /// Creates a new time entry in the data source.
+  ///
+  /// Throws an error if the creation fails.
+  TaskEither<IError, TimeEntry> create(TimeEntryCreate timeEntry);
+
+  /// Retrieves a time entry by its unique ID.
+  ///
+  /// Returns `null` if no time entry is found.
+  TaskEither<IError, TimeEntry> findById(String id);
+
+  /// Retrieves all time entries for a specific user.
+  ///
+  /// Returns an empty list if no time entries are found.
+  TaskEither<IError, List<TimeEntry>> findByUserId(String userId);
+
+  /// Retrieves all time entries for a specific project.
+  ///
+  /// Returns an empty list if no time entries are found.
+  TaskEither<IError, List<TimeEntry>> findByProjectId(String projectId);
+
+  /// Updates an existing time entry in the data source.
+  ///
+  /// Throws an error if the update fails.
+  TaskEither<IError, TimeEntry> update(TimeEntryUpdate timeEntry);
+
+  /// Deletes a time entry by its unique ID.
+  ///
+  /// Throws an error if the deletion fails.
+  TaskEither<IError, TimeEntry> delete(String id);
+
+  /// Retrieves all time entries in the data source.
+  ///
+  /// Returns an empty list if no time entries exist.
+  TaskEither<IError, List<TimeEntry>> findAll();
+
+  /// Generates a new unique ID for a time entry.
+  TaskEither<IError, String> generateId();
+}

backend-dart/lib/domain/entities/project.dart

@@ -5,6 +5,7 @@ part 'project.freezed.dart';
 @freezed
 class ProjectCreate with _$ProjectCreate {
   const factory ProjectCreate({
+    String? id,
     required String name,
     String? description,
     String? clientId,

backend-dart/lib/domain/entities/project.freezed.dart

@@ -16,6 +16,7 @@ final _privateConstructorUsedError = UnsupportedError(
 
 /// @nodoc
 mixin _$ProjectCreate {
+  String? get id => throw _privateConstructorUsedError;
   String get name => throw _privateConstructorUsedError;
   String? get description => throw _privateConstructorUsedError;
   String? get clientId => throw _privateConstructorUsedError;
@@ -35,7 +36,11 @@ abstract class $ProjectCreateCopyWith<$Res> {
       _$ProjectCreateCopyWithImpl<$Res, ProjectCreate>;
   @useResult
   $Res call(
-      {String name, String? description, String? clientId, String userId});
+      {String? id,
+      String name,
+      String? description,
+      String? clientId,
+      String userId});
 }
 
 /// @nodoc
@@ -53,12 +58,17 @@ class _$ProjectCreateCopyWithImpl<$Res, $Val extends ProjectCreate>
   @pragma('vm:prefer-inline')
   @override
   $Res call({
+    Object? id = freezed,
     Object? name = null,
     Object? description = freezed,
     Object? clientId = freezed,
     Object? userId = null,
   }) {
     return _then(_value.copyWith(
+      id: freezed == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String?,
       name: null == name
           ? _value.name
           : name // ignore: cast_nullable_to_non_nullable
@@ -88,7 +98,11 @@ abstract class _$$ProjectCreateImplCopyWith<$Res>
   @override
   @useResult
   $Res call(
-      {String name, String? description, String? clientId, String userId});
+      {String? id,
+      String name,
+      String? description,
+      String? clientId,
+      String userId});
 }
 
 /// @nodoc
@@ -104,12 +118,17 @@ class __$$ProjectCreateImplCopyWithImpl<$Res>
   @pragma('vm:prefer-inline')
   @override
   $Res call({
+    Object? id = freezed,
     Object? name = null,
     Object? description = freezed,
     Object? clientId = freezed,
     Object? userId = null,
   }) {
     return _then(_$ProjectCreateImpl(
+      id: freezed == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String?,
       name: null == name
           ? _value.name
           : name // ignore: cast_nullable_to_non_nullable
@@ -134,11 +153,14 @@ class __$$ProjectCreateImplCopyWithImpl<$Res>
 
 class _$ProjectCreateImpl implements _ProjectCreate {
   const _$ProjectCreateImpl(
-      {required this.name,
+      {this.id,
+      required this.name,
       this.description,
       this.clientId,
       required this.userId});
 
+  @override
+  final String? id;
   @override
   final String name;
   @override
@@ -150,7 +172,7 @@ class _$ProjectCreateImpl implements _ProjectCreate {
 
   @override
   String toString() {
-    return 'ProjectCreate(name: $name, description: $description, clientId: $clientId, userId: $userId)';
+    return 'ProjectCreate(id: $id, name: $name, description: $description, clientId: $clientId, userId: $userId)';
   }
 
   @override
@@ -158,6 +180,7 @@ class _$ProjectCreateImpl implements _ProjectCreate {
     return identical(this, other) ||
         (other.runtimeType == runtimeType &&
             other is _$ProjectCreateImpl &&
+            (identical(other.id, id) || other.id == id) &&
             (identical(other.name, name) || other.name == name) &&
             (identical(other.description, description) ||
                 other.description == description) &&
@@ -168,7 +191,7 @@ class _$ProjectCreateImpl implements _ProjectCreate {
 
   @override
   int get hashCode =>
-      Object.hash(runtimeType, name, description, clientId, userId);
+      Object.hash(runtimeType, id, name, description, clientId, userId);
 
   /// Create a copy of ProjectCreate
   /// with the given fields replaced by the non-null parameter values.
@@ -181,11 +204,14 @@ class _$ProjectCreateImpl implements _ProjectCreate {
 
 abstract class _ProjectCreate implements ProjectCreate {
   const factory _ProjectCreate(
-      {required final String name,
+      {final String? id,
+      required final String name,
       final String? description,
       final String? clientId,
       required final String userId}) = _$ProjectCreateImpl;
 
+  @override
+  String? get id;
   @override
   String get name;
   @override

backend-dart/lib/domain/entities/project_task.dart

@@ -0,0 +1,35 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'project_task.freezed.dart';
+
+@freezed
+class ProjectTask with _$ProjectTask {
+  const factory ProjectTask({
+    required String id,
+    required String name,
+    String? description,
+    required String projectId,
+    required DateTime createdAt,
+    required DateTime updatedAt,
+  }) = _ProjectTask;
+}
+
+@freezed
+class ProjectTaskCreate with _$ProjectTaskCreate {
+  const factory ProjectTaskCreate({
+    String? id,
+    required String name,
+    String? description,
+    required String projectId,
+  }) = _ProjectTaskCreate;
+}
+
+@freezed
+class ProjectTaskUpdate with _$ProjectTaskUpdate {
+  const factory ProjectTaskUpdate({
+    required String id,
+    String? name,
+    String? description,
+    String? projectId,
+  }) = _ProjectTaskUpdate;
+}

backend-dart/lib/domain/entities/project_task.freezed.dart

@@ -0,0 +1,622 @@
+// coverage:ignore-file
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint
+// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides, invalid_annotation_target, unnecessary_question_mark
+
+part of 'project_task.dart';
+
+// **************************************************************************
+// FreezedGenerator
+// **************************************************************************
+
+T _$identity<T>(T value) => value;
+
+final _privateConstructorUsedError = UnsupportedError(
+    'It seems like you constructed your class using `MyClass._()`. This constructor is only meant to be used by freezed and you are not supposed to need it nor use it.\nPlease check the documentation here for more information: https://github.com/rrousselGit/freezed#adding-getters-and-methods-to-our-models');
+
+/// @nodoc
+mixin _$ProjectTask {
+  String get id => throw _privateConstructorUsedError;
+  String get name => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String get projectId => throw _privateConstructorUsedError;
+  DateTime get createdAt => throw _privateConstructorUsedError;
+  DateTime get updatedAt => throw _privateConstructorUsedError;
+
+  /// Create a copy of ProjectTask
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $ProjectTaskCopyWith<ProjectTask> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $ProjectTaskCopyWith<$Res> {
+  factory $ProjectTaskCopyWith(
+          ProjectTask value, $Res Function(ProjectTask) then) =
+      _$ProjectTaskCopyWithImpl<$Res, ProjectTask>;
+  @useResult
+  $Res call(
+      {String id,
+      String name,
+      String? description,
+      String projectId,
+      DateTime createdAt,
+      DateTime updatedAt});
+}
+
+/// @nodoc
+class _$ProjectTaskCopyWithImpl<$Res, $Val extends ProjectTask>
+    implements $ProjectTaskCopyWith<$Res> {
+  _$ProjectTaskCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of ProjectTask
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? name = null,
+    Object? description = freezed,
+    Object? projectId = null,
+    Object? createdAt = null,
+    Object? updatedAt = null,
+  }) {
+    return _then(_value.copyWith(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      name: null == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+      createdAt: null == createdAt
+          ? _value.createdAt
+          : createdAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      updatedAt: null == updatedAt
+          ? _value.updatedAt
+          : updatedAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$ProjectTaskImplCopyWith<$Res>
+    implements $ProjectTaskCopyWith<$Res> {
+  factory _$$ProjectTaskImplCopyWith(
+          _$ProjectTaskImpl value, $Res Function(_$ProjectTaskImpl) then) =
+      __$$ProjectTaskImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call(
+      {String id,
+      String name,
+      String? description,
+      String projectId,
+      DateTime createdAt,
+      DateTime updatedAt});
+}
+
+/// @nodoc
+class __$$ProjectTaskImplCopyWithImpl<$Res>
+    extends _$ProjectTaskCopyWithImpl<$Res, _$ProjectTaskImpl>
+    implements _$$ProjectTaskImplCopyWith<$Res> {
+  __$$ProjectTaskImplCopyWithImpl(
+      _$ProjectTaskImpl _value, $Res Function(_$ProjectTaskImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of ProjectTask
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? name = null,
+    Object? description = freezed,
+    Object? projectId = null,
+    Object? createdAt = null,
+    Object? updatedAt = null,
+  }) {
+    return _then(_$ProjectTaskImpl(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      name: null == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+      createdAt: null == createdAt
+          ? _value.createdAt
+          : createdAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      updatedAt: null == updatedAt
+          ? _value.updatedAt
+          : updatedAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+    ));
+  }
+}
+
+/// @nodoc
+
+class _$ProjectTaskImpl implements _ProjectTask {
+  const _$ProjectTaskImpl(
+      {required this.id,
+      required this.name,
+      this.description,
+      required this.projectId,
+      required this.createdAt,
+      required this.updatedAt});
+
+  @override
+  final String id;
+  @override
+  final String name;
+  @override
+  final String? description;
+  @override
+  final String projectId;
+  @override
+  final DateTime createdAt;
+  @override
+  final DateTime updatedAt;
+
+  @override
+  String toString() {
+    return 'ProjectTask(id: $id, name: $name, description: $description, projectId: $projectId, createdAt: $createdAt, updatedAt: $updatedAt)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$ProjectTaskImpl &&
+            (identical(other.id, id) || other.id == id) &&
+            (identical(other.name, name) || other.name == name) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.projectId, projectId) ||
+                other.projectId == projectId) &&
+            (identical(other.createdAt, createdAt) ||
+                other.createdAt == createdAt) &&
+            (identical(other.updatedAt, updatedAt) ||
+                other.updatedAt == updatedAt));
+  }
+
+  @override
+  int get hashCode => Object.hash(
+      runtimeType, id, name, description, projectId, createdAt, updatedAt);
+
+  /// Create a copy of ProjectTask
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$ProjectTaskImplCopyWith<_$ProjectTaskImpl> get copyWith =>
+      __$$ProjectTaskImplCopyWithImpl<_$ProjectTaskImpl>(this, _$identity);
+}
+
+abstract class _ProjectTask implements ProjectTask {
+  const factory _ProjectTask(
+      {required final String id,
+      required final String name,
+      final String? description,
+      required final String projectId,
+      required final DateTime createdAt,
+      required final DateTime updatedAt}) = _$ProjectTaskImpl;
+
+  @override
+  String get id;
+  @override
+  String get name;
+  @override
+  String? get description;
+  @override
+  String get projectId;
+  @override
+  DateTime get createdAt;
+  @override
+  DateTime get updatedAt;
+
+  /// Create a copy of ProjectTask
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$ProjectTaskImplCopyWith<_$ProjectTaskImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+mixin _$ProjectTaskCreate {
+  String? get id => throw _privateConstructorUsedError;
+  String get name => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String get projectId => throw _privateConstructorUsedError;
+
+  /// Create a copy of ProjectTaskCreate
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $ProjectTaskCreateCopyWith<ProjectTaskCreate> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $ProjectTaskCreateCopyWith<$Res> {
+  factory $ProjectTaskCreateCopyWith(
+          ProjectTaskCreate value, $Res Function(ProjectTaskCreate) then) =
+      _$ProjectTaskCreateCopyWithImpl<$Res, ProjectTaskCreate>;
+  @useResult
+  $Res call({String? id, String name, String? description, String projectId});
+}
+
+/// @nodoc
+class _$ProjectTaskCreateCopyWithImpl<$Res, $Val extends ProjectTaskCreate>
+    implements $ProjectTaskCreateCopyWith<$Res> {
+  _$ProjectTaskCreateCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of ProjectTaskCreate
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = freezed,
+    Object? name = null,
+    Object? description = freezed,
+    Object? projectId = null,
+  }) {
+    return _then(_value.copyWith(
+      id: freezed == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String?,
+      name: null == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$ProjectTaskCreateImplCopyWith<$Res>
+    implements $ProjectTaskCreateCopyWith<$Res> {
+  factory _$$ProjectTaskCreateImplCopyWith(_$ProjectTaskCreateImpl value,
+          $Res Function(_$ProjectTaskCreateImpl) then) =
+      __$$ProjectTaskCreateImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call({String? id, String name, String? description, String projectId});
+}
+
+/// @nodoc
+class __$$ProjectTaskCreateImplCopyWithImpl<$Res>
+    extends _$ProjectTaskCreateCopyWithImpl<$Res, _$ProjectTaskCreateImpl>
+    implements _$$ProjectTaskCreateImplCopyWith<$Res> {
+  __$$ProjectTaskCreateImplCopyWithImpl(_$ProjectTaskCreateImpl _value,
+      $Res Function(_$ProjectTaskCreateImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of ProjectTaskCreate
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = freezed,
+    Object? name = null,
+    Object? description = freezed,
+    Object? projectId = null,
+  }) {
+    return _then(_$ProjectTaskCreateImpl(
+      id: freezed == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String?,
+      name: null == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+    ));
+  }
+}
+
+/// @nodoc
+
+class _$ProjectTaskCreateImpl implements _ProjectTaskCreate {
+  const _$ProjectTaskCreateImpl(
+      {this.id, required this.name, this.description, required this.projectId});
+
+  @override
+  final String? id;
+  @override
+  final String name;
+  @override
+  final String? description;
+  @override
+  final String projectId;
+
+  @override
+  String toString() {
+    return 'ProjectTaskCreate(id: $id, name: $name, description: $description, projectId: $projectId)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$ProjectTaskCreateImpl &&
+            (identical(other.id, id) || other.id == id) &&
+            (identical(other.name, name) || other.name == name) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.projectId, projectId) ||
+                other.projectId == projectId));
+  }
+
+  @override
+  int get hashCode =>
+      Object.hash(runtimeType, id, name, description, projectId);
+
+  /// Create a copy of ProjectTaskCreate
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$ProjectTaskCreateImplCopyWith<_$ProjectTaskCreateImpl> get copyWith =>
+      __$$ProjectTaskCreateImplCopyWithImpl<_$ProjectTaskCreateImpl>(
+          this, _$identity);
+}
+
+abstract class _ProjectTaskCreate implements ProjectTaskCreate {
+  const factory _ProjectTaskCreate(
+      {final String? id,
+      required final String name,
+      final String? description,
+      required final String projectId}) = _$ProjectTaskCreateImpl;
+
+  @override
+  String? get id;
+  @override
+  String get name;
+  @override
+  String? get description;
+  @override
+  String get projectId;
+
+  /// Create a copy of ProjectTaskCreate
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$ProjectTaskCreateImplCopyWith<_$ProjectTaskCreateImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+mixin _$ProjectTaskUpdate {
+  String get id => throw _privateConstructorUsedError;
+  String? get name => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String? get projectId => throw _privateConstructorUsedError;
+
+  /// Create a copy of ProjectTaskUpdate
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $ProjectTaskUpdateCopyWith<ProjectTaskUpdate> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $ProjectTaskUpdateCopyWith<$Res> {
+  factory $ProjectTaskUpdateCopyWith(
+          ProjectTaskUpdate value, $Res Function(ProjectTaskUpdate) then) =
+      _$ProjectTaskUpdateCopyWithImpl<$Res, ProjectTaskUpdate>;
+  @useResult
+  $Res call({String id, String? name, String? description, String? projectId});
+}
+
+/// @nodoc
+class _$ProjectTaskUpdateCopyWithImpl<$Res, $Val extends ProjectTaskUpdate>
+    implements $ProjectTaskUpdateCopyWith<$Res> {
+  _$ProjectTaskUpdateCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of ProjectTaskUpdate
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? name = freezed,
+    Object? description = freezed,
+    Object? projectId = freezed,
+  }) {
+    return _then(_value.copyWith(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      name: freezed == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String?,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: freezed == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String?,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$ProjectTaskUpdateImplCopyWith<$Res>
+    implements $ProjectTaskUpdateCopyWith<$Res> {
+  factory _$$ProjectTaskUpdateImplCopyWith(_$ProjectTaskUpdateImpl value,
+          $Res Function(_$ProjectTaskUpdateImpl) then) =
+      __$$ProjectTaskUpdateImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call({String id, String? name, String? description, String? projectId});
+}
+
+/// @nodoc
+class __$$ProjectTaskUpdateImplCopyWithImpl<$Res>
+    extends _$ProjectTaskUpdateCopyWithImpl<$Res, _$ProjectTaskUpdateImpl>
+    implements _$$ProjectTaskUpdateImplCopyWith<$Res> {
+  __$$ProjectTaskUpdateImplCopyWithImpl(_$ProjectTaskUpdateImpl _value,
+      $Res Function(_$ProjectTaskUpdateImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of ProjectTaskUpdate
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? name = freezed,
+    Object? description = freezed,
+    Object? projectId = freezed,
+  }) {
+    return _then(_$ProjectTaskUpdateImpl(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      name: freezed == name
+          ? _value.name
+          : name // ignore: cast_nullable_to_non_nullable
+              as String?,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: freezed == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String?,
+    ));
+  }
+}
+
+/// @nodoc
+
+class _$ProjectTaskUpdateImpl implements _ProjectTaskUpdate {
+  const _$ProjectTaskUpdateImpl(
+      {required this.id, this.name, this.description, this.projectId});
+
+  @override
+  final String id;
+  @override
+  final String? name;
+  @override
+  final String? description;
+  @override
+  final String? projectId;
+
+  @override
+  String toString() {
+    return 'ProjectTaskUpdate(id: $id, name: $name, description: $description, projectId: $projectId)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$ProjectTaskUpdateImpl &&
+            (identical(other.id, id) || other.id == id) &&
+            (identical(other.name, name) || other.name == name) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.projectId, projectId) ||
+                other.projectId == projectId));
+  }
+
+  @override
+  int get hashCode =>
+      Object.hash(runtimeType, id, name, description, projectId);
+
+  /// Create a copy of ProjectTaskUpdate
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$ProjectTaskUpdateImplCopyWith<_$ProjectTaskUpdateImpl> get copyWith =>
+      __$$ProjectTaskUpdateImplCopyWithImpl<_$ProjectTaskUpdateImpl>(
+          this, _$identity);
+}
+
+abstract class _ProjectTaskUpdate implements ProjectTaskUpdate {
+  const factory _ProjectTaskUpdate(
+      {required final String id,
+      final String? name,
+      final String? description,
+      final String? projectId}) = _$ProjectTaskUpdateImpl;
+
+  @override
+  String get id;
+  @override
+  String? get name;
+  @override
+  String? get description;
+  @override
+  String? get projectId;
+
+  /// Create a copy of ProjectTaskUpdate
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$ProjectTaskUpdateImplCopyWith<_$ProjectTaskUpdateImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}

backend-dart/lib/domain/entities/time_entry.dart

@@ -0,0 +1,51 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'time_entry.freezed.dart';
+part 'time_entry.g.dart';
+
+@freezed
+class TimeEntry with _$TimeEntry {
+  const factory TimeEntry({
+    required String id,
+    required DateTime startTime,
+    required DateTime endTime,
+    String? description,
+    required String userId,
+    required String projectId,
+    required DateTime createdAt,
+    required DateTime updatedAt,
+  }) = _TimeEntry;
+
+  factory TimeEntry.fromJson(Map<String, dynamic> json) =>
+      _$TimeEntryFromJson(json);
+}
+
+@freezed
+class TimeEntryCreate with _$TimeEntryCreate {
+  const factory TimeEntryCreate({
+    String? id,
+    required DateTime startTime,
+    required DateTime endTime,
+    String? description,
+    required String userId,
+    required String projectId,
+  }) = _TimeEntryCreate;
+
+  factory TimeEntryCreate.fromJson(Map<String, dynamic> json) =>
+      _$TimeEntryCreateFromJson(json);
+}
+
+@freezed
+class TimeEntryUpdate with _$TimeEntryUpdate {
+  const factory TimeEntryUpdate({
+    required String id,
+    DateTime? startTime,
+    DateTime? endTime,
+    String? description,
+    String? userId,
+    String? projectId,
+  }) = _TimeEntryUpdate;
+
+  factory TimeEntryUpdate.fromJson(Map<String, dynamic> json) =>
+      _$TimeEntryUpdateFromJson(json);
+}

backend-dart/lib/domain/entities/time_entry.freezed.dart

@@ -0,0 +1,829 @@
+// coverage:ignore-file
+// GENERATED CODE - DO NOT MODIFY BY HAND
+// ignore_for_file: type=lint
+// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides, invalid_annotation_target, unnecessary_question_mark
+
+part of 'time_entry.dart';
+
+// **************************************************************************
+// FreezedGenerator
+// **************************************************************************
+
+T _$identity<T>(T value) => value;
+
+final _privateConstructorUsedError = UnsupportedError(
+    'It seems like you constructed your class using `MyClass._()`. This constructor is only meant to be used by freezed and you are not supposed to need it nor use it.\nPlease check the documentation here for more information: https://github.com/rrousselGit/freezed#adding-getters-and-methods-to-our-models');
+
+TimeEntry _$TimeEntryFromJson(Map<String, dynamic> json) {
+  return _TimeEntry.fromJson(json);
+}
+
+/// @nodoc
+mixin _$TimeEntry {
+  String get id => throw _privateConstructorUsedError;
+  DateTime get startTime => throw _privateConstructorUsedError;
+  DateTime get endTime => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String get userId => throw _privateConstructorUsedError;
+  String get projectId => throw _privateConstructorUsedError;
+  DateTime get createdAt => throw _privateConstructorUsedError;
+  DateTime get updatedAt => throw _privateConstructorUsedError;
+
+  /// Serializes this TimeEntry to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of TimeEntry
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $TimeEntryCopyWith<TimeEntry> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $TimeEntryCopyWith<$Res> {
+  factory $TimeEntryCopyWith(TimeEntry value, $Res Function(TimeEntry) then) =
+      _$TimeEntryCopyWithImpl<$Res, TimeEntry>;
+  @useResult
+  $Res call(
+      {String id,
+      DateTime startTime,
+      DateTime endTime,
+      String? description,
+      String userId,
+      String projectId,
+      DateTime createdAt,
+      DateTime updatedAt});
+}
+
+/// @nodoc
+class _$TimeEntryCopyWithImpl<$Res, $Val extends TimeEntry>
+    implements $TimeEntryCopyWith<$Res> {
+  _$TimeEntryCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of TimeEntry
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? startTime = null,
+    Object? endTime = null,
+    Object? description = freezed,
+    Object? userId = null,
+    Object? projectId = null,
+    Object? createdAt = null,
+    Object? updatedAt = null,
+  }) {
+    return _then(_value.copyWith(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      startTime: null == startTime
+          ? _value.startTime
+          : startTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      endTime: null == endTime
+          ? _value.endTime
+          : endTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: null == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+      createdAt: null == createdAt
+          ? _value.createdAt
+          : createdAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      updatedAt: null == updatedAt
+          ? _value.updatedAt
+          : updatedAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$TimeEntryImplCopyWith<$Res>
+    implements $TimeEntryCopyWith<$Res> {
+  factory _$$TimeEntryImplCopyWith(
+          _$TimeEntryImpl value, $Res Function(_$TimeEntryImpl) then) =
+      __$$TimeEntryImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call(
+      {String id,
+      DateTime startTime,
+      DateTime endTime,
+      String? description,
+      String userId,
+      String projectId,
+      DateTime createdAt,
+      DateTime updatedAt});
+}
+
+/// @nodoc
+class __$$TimeEntryImplCopyWithImpl<$Res>
+    extends _$TimeEntryCopyWithImpl<$Res, _$TimeEntryImpl>
+    implements _$$TimeEntryImplCopyWith<$Res> {
+  __$$TimeEntryImplCopyWithImpl(
+      _$TimeEntryImpl _value, $Res Function(_$TimeEntryImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of TimeEntry
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? startTime = null,
+    Object? endTime = null,
+    Object? description = freezed,
+    Object? userId = null,
+    Object? projectId = null,
+    Object? createdAt = null,
+    Object? updatedAt = null,
+  }) {
+    return _then(_$TimeEntryImpl(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      startTime: null == startTime
+          ? _value.startTime
+          : startTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      endTime: null == endTime
+          ? _value.endTime
+          : endTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: null == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+      createdAt: null == createdAt
+          ? _value.createdAt
+          : createdAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      updatedAt: null == updatedAt
+          ? _value.updatedAt
+          : updatedAt // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$TimeEntryImpl implements _TimeEntry {
+  const _$TimeEntryImpl(
+      {required this.id,
+      required this.startTime,
+      required this.endTime,
+      this.description,
+      required this.userId,
+      required this.projectId,
+      required this.createdAt,
+      required this.updatedAt});
+
+  factory _$TimeEntryImpl.fromJson(Map<String, dynamic> json) =>
+      _$$TimeEntryImplFromJson(json);
+
+  @override
+  final String id;
+  @override
+  final DateTime startTime;
+  @override
+  final DateTime endTime;
+  @override
+  final String? description;
+  @override
+  final String userId;
+  @override
+  final String projectId;
+  @override
+  final DateTime createdAt;
+  @override
+  final DateTime updatedAt;
+
+  @override
+  String toString() {
+    return 'TimeEntry(id: $id, startTime: $startTime, endTime: $endTime, description: $description, userId: $userId, projectId: $projectId, createdAt: $createdAt, updatedAt: $updatedAt)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$TimeEntryImpl &&
+            (identical(other.id, id) || other.id == id) &&
+            (identical(other.startTime, startTime) ||
+                other.startTime == startTime) &&
+            (identical(other.endTime, endTime) || other.endTime == endTime) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.userId, userId) || other.userId == userId) &&
+            (identical(other.projectId, projectId) ||
+                other.projectId == projectId) &&
+            (identical(other.createdAt, createdAt) ||
+                other.createdAt == createdAt) &&
+            (identical(other.updatedAt, updatedAt) ||
+                other.updatedAt == updatedAt));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode => Object.hash(runtimeType, id, startTime, endTime,
+      description, userId, projectId, createdAt, updatedAt);
+
+  /// Create a copy of TimeEntry
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$TimeEntryImplCopyWith<_$TimeEntryImpl> get copyWith =>
+      __$$TimeEntryImplCopyWithImpl<_$TimeEntryImpl>(this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$TimeEntryImplToJson(
+      this,
+    );
+  }
+}
+
+abstract class _TimeEntry implements TimeEntry {
+  const factory _TimeEntry(
+      {required final String id,
+      required final DateTime startTime,
+      required final DateTime endTime,
+      final String? description,
+      required final String userId,
+      required final String projectId,
+      required final DateTime createdAt,
+      required final DateTime updatedAt}) = _$TimeEntryImpl;
+
+  factory _TimeEntry.fromJson(Map<String, dynamic> json) =
+      _$TimeEntryImpl.fromJson;
+
+  @override
+  String get id;
+  @override
+  DateTime get startTime;
+  @override
+  DateTime get endTime;
+  @override
+  String? get description;
+  @override
+  String get userId;
+  @override
+  String get projectId;
+  @override
+  DateTime get createdAt;
+  @override
+  DateTime get updatedAt;
+
+  /// Create a copy of TimeEntry
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$TimeEntryImplCopyWith<_$TimeEntryImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+TimeEntryCreate _$TimeEntryCreateFromJson(Map<String, dynamic> json) {
+  return _TimeEntryCreate.fromJson(json);
+}
+
+/// @nodoc
+mixin _$TimeEntryCreate {
+  String? get id => throw _privateConstructorUsedError;
+  DateTime get startTime => throw _privateConstructorUsedError;
+  DateTime get endTime => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String get userId => throw _privateConstructorUsedError;
+  String get projectId => throw _privateConstructorUsedError;
+
+  /// Serializes this TimeEntryCreate to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of TimeEntryCreate
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $TimeEntryCreateCopyWith<TimeEntryCreate> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $TimeEntryCreateCopyWith<$Res> {
+  factory $TimeEntryCreateCopyWith(
+          TimeEntryCreate value, $Res Function(TimeEntryCreate) then) =
+      _$TimeEntryCreateCopyWithImpl<$Res, TimeEntryCreate>;
+  @useResult
+  $Res call(
+      {String? id,
+      DateTime startTime,
+      DateTime endTime,
+      String? description,
+      String userId,
+      String projectId});
+}
+
+/// @nodoc
+class _$TimeEntryCreateCopyWithImpl<$Res, $Val extends TimeEntryCreate>
+    implements $TimeEntryCreateCopyWith<$Res> {
+  _$TimeEntryCreateCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of TimeEntryCreate
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = freezed,
+    Object? startTime = null,
+    Object? endTime = null,
+    Object? description = freezed,
+    Object? userId = null,
+    Object? projectId = null,
+  }) {
+    return _then(_value.copyWith(
+      id: freezed == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String?,
+      startTime: null == startTime
+          ? _value.startTime
+          : startTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      endTime: null == endTime
+          ? _value.endTime
+          : endTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: null == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$TimeEntryCreateImplCopyWith<$Res>
+    implements $TimeEntryCreateCopyWith<$Res> {
+  factory _$$TimeEntryCreateImplCopyWith(_$TimeEntryCreateImpl value,
+          $Res Function(_$TimeEntryCreateImpl) then) =
+      __$$TimeEntryCreateImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call(
+      {String? id,
+      DateTime startTime,
+      DateTime endTime,
+      String? description,
+      String userId,
+      String projectId});
+}
+
+/// @nodoc
+class __$$TimeEntryCreateImplCopyWithImpl<$Res>
+    extends _$TimeEntryCreateCopyWithImpl<$Res, _$TimeEntryCreateImpl>
+    implements _$$TimeEntryCreateImplCopyWith<$Res> {
+  __$$TimeEntryCreateImplCopyWithImpl(
+      _$TimeEntryCreateImpl _value, $Res Function(_$TimeEntryCreateImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of TimeEntryCreate
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = freezed,
+    Object? startTime = null,
+    Object? endTime = null,
+    Object? description = freezed,
+    Object? userId = null,
+    Object? projectId = null,
+  }) {
+    return _then(_$TimeEntryCreateImpl(
+      id: freezed == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String?,
+      startTime: null == startTime
+          ? _value.startTime
+          : startTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      endTime: null == endTime
+          ? _value.endTime
+          : endTime // ignore: cast_nullable_to_non_nullable
+              as DateTime,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: null == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String,
+      projectId: null == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$TimeEntryCreateImpl implements _TimeEntryCreate {
+  const _$TimeEntryCreateImpl(
+      {this.id,
+      required this.startTime,
+      required this.endTime,
+      this.description,
+      required this.userId,
+      required this.projectId});
+
+  factory _$TimeEntryCreateImpl.fromJson(Map<String, dynamic> json) =>
+      _$$TimeEntryCreateImplFromJson(json);
+
+  @override
+  final String? id;
+  @override
+  final DateTime startTime;
+  @override
+  final DateTime endTime;
+  @override
+  final String? description;
+  @override
+  final String userId;
+  @override
+  final String projectId;
+
+  @override
+  String toString() {
+    return 'TimeEntryCreate(id: $id, startTime: $startTime, endTime: $endTime, description: $description, userId: $userId, projectId: $projectId)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$TimeEntryCreateImpl &&
+            (identical(other.id, id) || other.id == id) &&
+            (identical(other.startTime, startTime) ||
+                other.startTime == startTime) &&
+            (identical(other.endTime, endTime) || other.endTime == endTime) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.userId, userId) || other.userId == userId) &&
+            (identical(other.projectId, projectId) ||
+                other.projectId == projectId));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode => Object.hash(
+      runtimeType, id, startTime, endTime, description, userId, projectId);
+
+  /// Create a copy of TimeEntryCreate
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$TimeEntryCreateImplCopyWith<_$TimeEntryCreateImpl> get copyWith =>
+      __$$TimeEntryCreateImplCopyWithImpl<_$TimeEntryCreateImpl>(
+          this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$TimeEntryCreateImplToJson(
+      this,
+    );
+  }
+}
+
+abstract class _TimeEntryCreate implements TimeEntryCreate {
+  const factory _TimeEntryCreate(
+      {final String? id,
+      required final DateTime startTime,
+      required final DateTime endTime,
+      final String? description,
+      required final String userId,
+      required final String projectId}) = _$TimeEntryCreateImpl;
+
+  factory _TimeEntryCreate.fromJson(Map<String, dynamic> json) =
+      _$TimeEntryCreateImpl.fromJson;
+
+  @override
+  String? get id;
+  @override
+  DateTime get startTime;
+  @override
+  DateTime get endTime;
+  @override
+  String? get description;
+  @override
+  String get userId;
+  @override
+  String get projectId;
+
+  /// Create a copy of TimeEntryCreate
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$TimeEntryCreateImplCopyWith<_$TimeEntryCreateImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+TimeEntryUpdate _$TimeEntryUpdateFromJson(Map<String, dynamic> json) {
+  return _TimeEntryUpdate.fromJson(json);
+}
+
+/// @nodoc
+mixin _$TimeEntryUpdate {
+  String get id => throw _privateConstructorUsedError;
+  DateTime? get startTime => throw _privateConstructorUsedError;
+  DateTime? get endTime => throw _privateConstructorUsedError;
+  String? get description => throw _privateConstructorUsedError;
+  String? get userId => throw _privateConstructorUsedError;
+  String? get projectId => throw _privateConstructorUsedError;
+
+  /// Serializes this TimeEntryUpdate to a JSON map.
+  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
+
+  /// Create a copy of TimeEntryUpdate
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  $TimeEntryUpdateCopyWith<TimeEntryUpdate> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $TimeEntryUpdateCopyWith<$Res> {
+  factory $TimeEntryUpdateCopyWith(
+          TimeEntryUpdate value, $Res Function(TimeEntryUpdate) then) =
+      _$TimeEntryUpdateCopyWithImpl<$Res, TimeEntryUpdate>;
+  @useResult
+  $Res call(
+      {String id,
+      DateTime? startTime,
+      DateTime? endTime,
+      String? description,
+      String? userId,
+      String? projectId});
+}
+
+/// @nodoc
+class _$TimeEntryUpdateCopyWithImpl<$Res, $Val extends TimeEntryUpdate>
+    implements $TimeEntryUpdateCopyWith<$Res> {
+  _$TimeEntryUpdateCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of TimeEntryUpdate
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? startTime = freezed,
+    Object? endTime = freezed,
+    Object? description = freezed,
+    Object? userId = freezed,
+    Object? projectId = freezed,
+  }) {
+    return _then(_value.copyWith(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      startTime: freezed == startTime
+          ? _value.startTime
+          : startTime // ignore: cast_nullable_to_non_nullable
+              as DateTime?,
+      endTime: freezed == endTime
+          ? _value.endTime
+          : endTime // ignore: cast_nullable_to_non_nullable
+              as DateTime?,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: freezed == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: freezed == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String?,
+    ) as $Val);
+  }
+}
+
+/// @nodoc
+abstract class _$$TimeEntryUpdateImplCopyWith<$Res>
+    implements $TimeEntryUpdateCopyWith<$Res> {
+  factory _$$TimeEntryUpdateImplCopyWith(_$TimeEntryUpdateImpl value,
+          $Res Function(_$TimeEntryUpdateImpl) then) =
+      __$$TimeEntryUpdateImplCopyWithImpl<$Res>;
+  @override
+  @useResult
+  $Res call(
+      {String id,
+      DateTime? startTime,
+      DateTime? endTime,
+      String? description,
+      String? userId,
+      String? projectId});
+}
+
+/// @nodoc
+class __$$TimeEntryUpdateImplCopyWithImpl<$Res>
+    extends _$TimeEntryUpdateCopyWithImpl<$Res, _$TimeEntryUpdateImpl>
+    implements _$$TimeEntryUpdateImplCopyWith<$Res> {
+  __$$TimeEntryUpdateImplCopyWithImpl(
+      _$TimeEntryUpdateImpl _value, $Res Function(_$TimeEntryUpdateImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of TimeEntryUpdate
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? id = null,
+    Object? startTime = freezed,
+    Object? endTime = freezed,
+    Object? description = freezed,
+    Object? userId = freezed,
+    Object? projectId = freezed,
+  }) {
+    return _then(_$TimeEntryUpdateImpl(
+      id: null == id
+          ? _value.id
+          : id // ignore: cast_nullable_to_non_nullable
+              as String,
+      startTime: freezed == startTime
+          ? _value.startTime
+          : startTime // ignore: cast_nullable_to_non_nullable
+              as DateTime?,
+      endTime: freezed == endTime
+          ? _value.endTime
+          : endTime // ignore: cast_nullable_to_non_nullable
+              as DateTime?,
+      description: freezed == description
+          ? _value.description
+          : description // ignore: cast_nullable_to_non_nullable
+              as String?,
+      userId: freezed == userId
+          ? _value.userId
+          : userId // ignore: cast_nullable_to_non_nullable
+              as String?,
+      projectId: freezed == projectId
+          ? _value.projectId
+          : projectId // ignore: cast_nullable_to_non_nullable
+              as String?,
+    ));
+  }
+}
+
+/// @nodoc
+@JsonSerializable()
+class _$TimeEntryUpdateImpl implements _TimeEntryUpdate {
+  const _$TimeEntryUpdateImpl(
+      {required this.id,
+      this.startTime,
+      this.endTime,
+      this.description,
+      this.userId,
+      this.projectId});
+
+  factory _$TimeEntryUpdateImpl.fromJson(Map<String, dynamic> json) =>
+      _$$TimeEntryUpdateImplFromJson(json);
+
+  @override
+  final String id;
+  @override
+  final DateTime? startTime;
+  @override
+  final DateTime? endTime;
+  @override
+  final String? description;
+  @override
+  final String? userId;
+  @override
+  final String? projectId;
+
+  @override
+  String toString() {
+    return 'TimeEntryUpdate(id: $id, startTime: $startTime, endTime: $endTime, description: $description, userId: $userId, projectId: $projectId)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$TimeEntryUpdateImpl &&
+            (identical(other.id, id) || other.id == id) &&
+            (identical(other.startTime, startTime) ||
+                other.startTime == startTime) &&
+            (identical(other.endTime, endTime) || other.endTime == endTime) &&
+            (identical(other.description, description) ||
+                other.description == description) &&
+            (identical(other.userId, userId) || other.userId == userId) &&
+            (identical(other.projectId, projectId) ||
+                other.projectId == projectId));
+  }
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  int get hashCode => Object.hash(
+      runtimeType, id, startTime, endTime, description, userId, projectId);
+
+  /// Create a copy of TimeEntryUpdate
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$TimeEntryUpdateImplCopyWith<_$TimeEntryUpdateImpl> get copyWith =>
+      __$$TimeEntryUpdateImplCopyWithImpl<_$TimeEntryUpdateImpl>(
+          this, _$identity);
+
+  @override
+  Map<String, dynamic> toJson() {
+    return _$$TimeEntryUpdateImplToJson(
+      this,
+    );
+  }
+}
+
+abstract class _TimeEntryUpdate implements TimeEntryUpdate {
+  const factory _TimeEntryUpdate(
+      {required final String id,
+      final DateTime? startTime,
+      final DateTime? endTime,
+      final String? description,
+      final String? userId,
+      final String? projectId}) = _$TimeEntryUpdateImpl;
+
+  factory _TimeEntryUpdate.fromJson(Map<String, dynamic> json) =
+      _$TimeEntryUpdateImpl.fromJson;
+
+  @override
+  String get id;
+  @override
+  DateTime? get startTime;
+  @override
+  DateTime? get endTime;
+  @override
+  String? get description;
+  @override
+  String? get userId;
+  @override
+  String? get projectId;
+
+  /// Create a copy of TimeEntryUpdate
+  /// with the given fields replaced by the non-null parameter values.
+  @override
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$TimeEntryUpdateImplCopyWith<_$TimeEntryUpdateImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}

backend-dart/lib/domain/entities/time_entry.g.dart

@@ -0,0 +1,79 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'time_entry.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+_$TimeEntryImpl _$$TimeEntryImplFromJson(Map<String, dynamic> json) =>
+    _$TimeEntryImpl(
+      id: json['id'] as String,
+      startTime: DateTime.parse(json['startTime'] as String),
+      endTime: DateTime.parse(json['endTime'] as String),
+      description: json['description'] as String?,
+      userId: json['userId'] as String,
+      projectId: json['projectId'] as String,
+      createdAt: DateTime.parse(json['createdAt'] as String),
+      updatedAt: DateTime.parse(json['updatedAt'] as String),
+    );
+
+Map<String, dynamic> _$$TimeEntryImplToJson(_$TimeEntryImpl instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'startTime': instance.startTime.toIso8601String(),
+      'endTime': instance.endTime.toIso8601String(),
+      'description': instance.description,
+      'userId': instance.userId,
+      'projectId': instance.projectId,
+      'createdAt': instance.createdAt.toIso8601String(),
+      'updatedAt': instance.updatedAt.toIso8601String(),
+    };
+
+_$TimeEntryCreateImpl _$$TimeEntryCreateImplFromJson(
+        Map<String, dynamic> json) =>
+    _$TimeEntryCreateImpl(
+      id: json['id'] as String?,
+      startTime: DateTime.parse(json['startTime'] as String),
+      endTime: DateTime.parse(json['endTime'] as String),
+      description: json['description'] as String?,
+      userId: json['userId'] as String,
+      projectId: json['projectId'] as String,
+    );
+
+Map<String, dynamic> _$$TimeEntryCreateImplToJson(
+        _$TimeEntryCreateImpl instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'startTime': instance.startTime.toIso8601String(),
+      'endTime': instance.endTime.toIso8601String(),
+      'description': instance.description,
+      'userId': instance.userId,
+      'projectId': instance.projectId,
+    };
+
+_$TimeEntryUpdateImpl _$$TimeEntryUpdateImplFromJson(
+        Map<String, dynamic> json) =>
+    _$TimeEntryUpdateImpl(
+      id: json['id'] as String,
+      startTime: json['startTime'] == null
+          ? null
+          : DateTime.parse(json['startTime'] as String),
+      endTime: json['endTime'] == null
+          ? null
+          : DateTime.parse(json['endTime'] as String),
+      description: json['description'] as String?,
+      userId: json['userId'] as String?,
+      projectId: json['projectId'] as String?,
+    );
+
+Map<String, dynamic> _$$TimeEntryUpdateImplToJson(
+        _$TimeEntryUpdateImpl instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'startTime': instance.startTime?.toIso8601String(),
+      'endTime': instance.endTime?.toIso8601String(),
+      'description': instance.description,
+      'userId': instance.userId,
+      'projectId': instance.projectId,
+    };

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

@@ -0,0 +1,20 @@
+import 'package:fpdart/fpdart.dart';
+import 'package:backend_dart/domain/entities/project.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+
+abstract class ProjectRepository {
+  /// Creates a new project.
+  TaskEither<IError, Project> create(ProjectCreate project);
+
+  /// Finds a project by its unique ID.
+  TaskEither<IError, Project> findById(String id);
+
+  /// Updates an existing project.
+  TaskEither<IError, Project> update(ProjectUpdate project);
+
+  /// Deletes a project by its unique ID.
+  TaskEither<IError, void> delete(String id);
+
+  /// Finds all projects.
+  TaskEither<IError, List<Project>> findAll();
+}

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

@@ -0,0 +1,23 @@
+import 'package:fpdart/fpdart.dart';
+import 'package:backend_dart/domain/entities/project_task.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+
+abstract class ProjectTaskRepository {
+  /// Creates a new project task.
+  TaskEither<IError, ProjectTask> create(ProjectTaskCreate task);
+
+  /// Finds a project task by its unique ID.
+  TaskEither<IError, ProjectTask> findById(String id);
+
+  /// Finds all tasks for a specific project.
+  TaskEither<IError, List<ProjectTask>> findByProjectId(String projectId);
+
+  /// Updates an existing project task.
+  TaskEither<IError, ProjectTask> update(ProjectTaskUpdate task);
+
+  /// Deletes a project task by its unique ID.
+  TaskEither<IError, void> delete(String id);
+
+  /// Finds all project tasks.
+  TaskEither<IError, List<ProjectTask>> findAll();
+}

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

@@ -0,0 +1,26 @@
+import 'package:fpdart/fpdart.dart';
+import 'package:backend_dart/domain/entities/time_entry.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+
+abstract class TimeEntryRepository {
+  /// Creates a new time entry.
+  TaskEither<IError, TimeEntry> create(TimeEntryCreate timeEntry);
+
+  /// Finds a time entry by its unique ID.
+  TaskEither<IError, TimeEntry> findById(String id);
+
+  /// Finds all time entries for a specific user.
+  TaskEither<IError, List<TimeEntry>> findByUserId(String userId);
+
+  /// Finds all time entries for a specific project.
+  TaskEither<IError, List<TimeEntry>> findByProjectId(String projectId);
+
+  /// Updates an existing time entry.
+  TaskEither<IError, TimeEntry> update(TimeEntryUpdate timeEntry);
+
+  /// Deletes a time entry by its unique ID.
+  TaskEither<IError, void> delete(String id);
+
+  /// Finds all time entries.
+  TaskEither<IError, List<TimeEntry>> findAll();
+}

backend-dart/lib/infrastructure/persistence/db/client.dart

@@ -1501,15 +1501,15 @@ class TimeEntryDboDelegate {
   }
 }
 
-class TaskDboDelegate {
+class ProjectTaskDboDelegate {
-  const TaskDboDelegate._(this._client);
+  const ProjectTaskDboDelegate._(this._client);
 
   final PrismaClient _client;
 
-  _i1.ActionClient<_i2.TaskDbo?> findUnique({
+  _i1.ActionClient<_i2.ProjectTaskDbo?> findUnique({
-    required _i3.TaskDboWhereUniqueInput where,
+    required _i3.ProjectTaskDboWhereUniqueInput where,
-    _i3.TaskDboSelect? select,
+    _i3.ProjectTaskDboSelect? select,
-    _i3.TaskDboInclude? include,
+    _i3.ProjectTaskDboInclude? include,
   }) {
     final args = {
       'where': where,
@@ -1518,7 +1518,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.findUnique,
       datamodel: PrismaClient.datamodel,
     );
@@ -1527,17 +1527,17 @@ class TaskDboDelegate {
       headers: _client.$transaction.headers,
       transaction: _client.$transaction.transaction,
     );
-    return _i1.ActionClient<_i2.TaskDbo?>(
+    return _i1.ActionClient<_i2.ProjectTaskDbo?>(
-      action: 'findUniqueTaskDbo',
+      action: 'findUniqueProjectTaskDbo',
       result: result,
-      factory: (e) => e != null ? _i2.TaskDbo.fromJson(e) : null,
+      factory: (e) => e != null ? _i2.ProjectTaskDbo.fromJson(e) : null,
     );
   }
 
-  _i1.ActionClient<_i2.TaskDbo> findUniqueOrThrow({
+  _i1.ActionClient<_i2.ProjectTaskDbo> findUniqueOrThrow({
-    required _i3.TaskDboWhereUniqueInput where,
+    required _i3.ProjectTaskDboWhereUniqueInput where,
-    _i3.TaskDboSelect? select,
+    _i3.ProjectTaskDboSelect? select,
-    _i3.TaskDboInclude? include,
+    _i3.ProjectTaskDboInclude? include,
   }) {
     final args = {
       'where': where,
@@ -1546,7 +1546,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.findUniqueOrThrow,
       datamodel: PrismaClient.datamodel,
     );
@@ -1555,24 +1555,26 @@ class TaskDboDelegate {
       headers: _client.$transaction.headers,
       transaction: _client.$transaction.transaction,
     );
-    return _i1.ActionClient<_i2.TaskDbo>(
+    return _i1.ActionClient<_i2.ProjectTaskDbo>(
-      action: 'findUniqueTaskDboOrThrow',
+      action: 'findUniqueProjectTaskDboOrThrow',
       result: result,
-      factory: (e) => _i2.TaskDbo.fromJson(e),
+      factory: (e) => _i2.ProjectTaskDbo.fromJson(e),
     );
   }
 
-  _i1.ActionClient<_i2.TaskDbo?> findFirst({
+  _i1.ActionClient<_i2.ProjectTaskDbo?> findFirst({
-    _i3.TaskDboWhereInput? where,
+    _i3.ProjectTaskDboWhereInput? where,
-    _i1.PrismaUnion<Iterable<_i3.TaskDboOrderByWithRelationInput>,
+    _i1.PrismaUnion<Iterable<_i3.ProjectTaskDboOrderByWithRelationInput>,
-            _i3.TaskDboOrderByWithRelationInput>?
+            _i3.ProjectTaskDboOrderByWithRelationInput>?
         orderBy,
-    _i3.TaskDboWhereUniqueInput? cursor,
+    _i3.ProjectTaskDboWhereUniqueInput? cursor,
     int? take,
     int? skip,
-    _i1.PrismaUnion<_i3.TaskDboScalar, Iterable<_i3.TaskDboScalar>>? distinct,
+    _i1.PrismaUnion<_i3.ProjectTaskDboScalar,
-    _i3.TaskDboSelect? select,
+            Iterable<_i3.ProjectTaskDboScalar>>?
-    _i3.TaskDboInclude? include,
+        distinct,
+    _i3.ProjectTaskDboSelect? select,
+    _i3.ProjectTaskDboInclude? include,
   }) {
     final args = {
       'where': where,
@@ -1586,7 +1588,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.findFirst,
       datamodel: PrismaClient.datamodel,
     );
@@ -1595,24 +1597,26 @@ class TaskDboDelegate {
       headers: _client.$transaction.headers,
       transaction: _client.$transaction.transaction,
     );
-    return _i1.ActionClient<_i2.TaskDbo?>(
+    return _i1.ActionClient<_i2.ProjectTaskDbo?>(
-      action: 'findFirstTaskDbo',
+      action: 'findFirstProjectTaskDbo',
       result: result,
-      factory: (e) => e != null ? _i2.TaskDbo.fromJson(e) : null,
+      factory: (e) => e != null ? _i2.ProjectTaskDbo.fromJson(e) : null,
     );
   }
 
-  _i1.ActionClient<_i2.TaskDbo> findFirstOrThrow({
+  _i1.ActionClient<_i2.ProjectTaskDbo> findFirstOrThrow({
-    _i3.TaskDboWhereInput? where,
+    _i3.ProjectTaskDboWhereInput? where,
-    _i1.PrismaUnion<Iterable<_i3.TaskDboOrderByWithRelationInput>,
+    _i1.PrismaUnion<Iterable<_i3.ProjectTaskDboOrderByWithRelationInput>,
-            _i3.TaskDboOrderByWithRelationInput>?
+            _i3.ProjectTaskDboOrderByWithRelationInput>?
         orderBy,
-    _i3.TaskDboWhereUniqueInput? cursor,
+    _i3.ProjectTaskDboWhereUniqueInput? cursor,
     int? take,
     int? skip,
-    _i1.PrismaUnion<_i3.TaskDboScalar, Iterable<_i3.TaskDboScalar>>? distinct,
+    _i1.PrismaUnion<_i3.ProjectTaskDboScalar,
-    _i3.TaskDboSelect? select,
+            Iterable<_i3.ProjectTaskDboScalar>>?
-    _i3.TaskDboInclude? include,
+        distinct,
+    _i3.ProjectTaskDboSelect? select,
+    _i3.ProjectTaskDboInclude? include,
   }) {
     final args = {
       'where': where,
@@ -1626,7 +1630,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.findFirstOrThrow,
       datamodel: PrismaClient.datamodel,
     );
@@ -1635,24 +1639,26 @@ class TaskDboDelegate {
       headers: _client.$transaction.headers,
       transaction: _client.$transaction.transaction,
     );
-    return _i1.ActionClient<_i2.TaskDbo>(
+    return _i1.ActionClient<_i2.ProjectTaskDbo>(
-      action: 'findFirstTaskDboOrThrow',
+      action: 'findFirstProjectTaskDboOrThrow',
       result: result,
-      factory: (e) => _i2.TaskDbo.fromJson(e),
+      factory: (e) => _i2.ProjectTaskDbo.fromJson(e),
     );
   }
 
-  _i1.ActionClient<Iterable<_i2.TaskDbo>> findMany({
+  _i1.ActionClient<Iterable<_i2.ProjectTaskDbo>> findMany({
-    _i3.TaskDboWhereInput? where,
+    _i3.ProjectTaskDboWhereInput? where,
-    _i1.PrismaUnion<Iterable<_i3.TaskDboOrderByWithRelationInput>,
+    _i1.PrismaUnion<Iterable<_i3.ProjectTaskDboOrderByWithRelationInput>,
-            _i3.TaskDboOrderByWithRelationInput>?
+            _i3.ProjectTaskDboOrderByWithRelationInput>?
         orderBy,
-    _i3.TaskDboWhereUniqueInput? cursor,
+    _i3.ProjectTaskDboWhereUniqueInput? cursor,
     int? take,
     int? skip,
-    _i1.PrismaUnion<_i3.TaskDboScalar, Iterable<_i3.TaskDboScalar>>? distinct,
+    _i1.PrismaUnion<_i3.ProjectTaskDboScalar,
-    _i3.TaskDboSelect? select,
+            Iterable<_i3.ProjectTaskDboScalar>>?
-    _i3.TaskDboInclude? include,
+        distinct,
+    _i3.ProjectTaskDboSelect? select,
+    _i3.ProjectTaskDboInclude? include,
   }) {
     final args = {
       'where': where,
@@ -1666,7 +1672,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.findMany,
       datamodel: PrismaClient.datamodel,
     );
@@ -1675,20 +1681,20 @@ class TaskDboDelegate {
       headers: _client.$transaction.headers,
       transaction: _client.$transaction.transaction,
     );
-    return _i1.ActionClient<Iterable<_i2.TaskDbo>>(
+    return _i1.ActionClient<Iterable<_i2.ProjectTaskDbo>>(
-      action: 'findManyTaskDbo',
+      action: 'findManyProjectTaskDbo',
       result: result,
       factory: (values) =>
-          (values as Iterable).map((e) => _i2.TaskDbo.fromJson(e)),
+          (values as Iterable).map((e) => _i2.ProjectTaskDbo.fromJson(e)),
     );
   }
 
-  _i1.ActionClient<_i2.TaskDbo> create({
+  _i1.ActionClient<_i2.ProjectTaskDbo> create({
-    required _i1
+    required _i1.PrismaUnion<_i3.ProjectTaskDboCreateInput,
-        .PrismaUnion<_i3.TaskDboCreateInput, _i3.TaskDboUncheckedCreateInput>
+            _i3.ProjectTaskDboUncheckedCreateInput>
         data,
-    _i3.TaskDboSelect? select,
+    _i3.ProjectTaskDboSelect? select,
-    _i3.TaskDboInclude? include,
+    _i3.ProjectTaskDboInclude? include,
   }) {
     final args = {
       'data': data,
@@ -1697,7 +1703,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.createOne,
       datamodel: PrismaClient.datamodel,
     );
@@ -1706,16 +1712,16 @@ class TaskDboDelegate {
       headers: _client.$transaction.headers,
       transaction: _client.$transaction.transaction,
     );
-    return _i1.ActionClient<_i2.TaskDbo>(
+    return _i1.ActionClient<_i2.ProjectTaskDbo>(
-      action: 'createOneTaskDbo',
+      action: 'createOneProjectTaskDbo',
       result: result,
-      factory: (e) => _i2.TaskDbo.fromJson(e),
+      factory: (e) => _i2.ProjectTaskDbo.fromJson(e),
     );
   }
 
   _i1.ActionClient<_i3.AffectedRowsOutput> createMany({
-    required _i1.PrismaUnion<_i3.TaskDboCreateManyInput,
+    required _i1.PrismaUnion<_i3.ProjectTaskDboCreateManyInput,
-            Iterable<_i3.TaskDboCreateManyInput>>
+            Iterable<_i3.ProjectTaskDboCreateManyInput>>
         data,
     bool? skipDuplicates,
   }) {
@@ -1725,7 +1731,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.createMany,
       datamodel: PrismaClient.datamodel,
     );
@@ -1735,20 +1741,20 @@ class TaskDboDelegate {
       transaction: _client.$transaction.transaction,
     );
     return _i1.ActionClient<_i3.AffectedRowsOutput>(
-      action: 'createManyTaskDbo',
+      action: 'createManyProjectTaskDbo',
       result: result,
       factory: (e) => _i3.AffectedRowsOutput.fromJson(e),
     );
   }
 
-  _i1.ActionClient<Iterable<_i2.CreateManyTaskDboAndReturnOutputType>>
+  _i1.ActionClient<Iterable<_i2.CreateManyProjectTaskDboAndReturnOutputType>>
       createManyAndReturn({
-    required _i1.PrismaUnion<_i3.TaskDboCreateManyInput,
+    required _i1.PrismaUnion<_i3.ProjectTaskDboCreateManyInput,
-            Iterable<_i3.TaskDboCreateManyInput>>
+            Iterable<_i3.ProjectTaskDboCreateManyInput>>
         data,
     bool? skipDuplicates,
-    _i3.CreateManyTaskDboAndReturnOutputTypeSelect? select,
+    _i3.CreateManyProjectTaskDboAndReturnOutputTypeSelect? select,
-    _i3.CreateManyTaskDboAndReturnOutputTypeInclude? include,
+    _i3.CreateManyProjectTaskDboAndReturnOutputTypeInclude? include,
   }) {
     final args = {
       'data': data,
@@ -1758,7 +1764,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.createManyAndReturn,
       datamodel: PrismaClient.datamodel,
     );
@@ -1767,21 +1773,22 @@ class TaskDboDelegate {
       headers: _client.$transaction.headers,
       transaction: _client.$transaction.transaction,
     );
-    return _i1.ActionClient<Iterable<_i2.CreateManyTaskDboAndReturnOutputType>>(
+    return _i1.ActionClient<
-      action: 'createManyTaskDboAndReturn',
+        Iterable<_i2.CreateManyProjectTaskDboAndReturnOutputType>>(
+      action: 'createManyProjectTaskDboAndReturn',
       result: result,
-      factory: (values) => (values as Iterable)
+      factory: (values) => (values as Iterable).map(
-          .map((e) => _i2.CreateManyTaskDboAndReturnOutputType.fromJson(e)),
+          (e) => _i2.CreateManyProjectTaskDboAndReturnOutputType.fromJson(e)),
     );
   }
 
-  _i1.ActionClient<_i2.TaskDbo?> update({
+  _i1.ActionClient<_i2.ProjectTaskDbo?> update({
-    required _i1
+    required _i1.PrismaUnion<_i3.ProjectTaskDboUpdateInput,
-        .PrismaUnion<_i3.TaskDboUpdateInput, _i3.TaskDboUncheckedUpdateInput>
+            _i3.ProjectTaskDboUncheckedUpdateInput>
         data,
-    required _i3.TaskDboWhereUniqueInput where,
+    required _i3.ProjectTaskDboWhereUniqueInput where,
-    _i3.TaskDboSelect? select,
+    _i3.ProjectTaskDboSelect? select,
-    _i3.TaskDboInclude? include,
+    _i3.ProjectTaskDboInclude? include,
   }) {
     final args = {
       'data': data,
@@ -1791,7 +1798,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.updateOne,
       datamodel: PrismaClient.datamodel,
     );
@@ -1800,18 +1807,18 @@ class TaskDboDelegate {
       headers: _client.$transaction.headers,
       transaction: _client.$transaction.transaction,
     );
-    return _i1.ActionClient<_i2.TaskDbo?>(
+    return _i1.ActionClient<_i2.ProjectTaskDbo?>(
-      action: 'updateOneTaskDbo',
+      action: 'updateOneProjectTaskDbo',
       result: result,
-      factory: (e) => e != null ? _i2.TaskDbo.fromJson(e) : null,
+      factory: (e) => e != null ? _i2.ProjectTaskDbo.fromJson(e) : null,
     );
   }
 
   _i1.ActionClient<_i3.AffectedRowsOutput> updateMany({
-    required _i1.PrismaUnion<_i3.TaskDboUpdateManyMutationInput,
+    required _i1.PrismaUnion<_i3.ProjectTaskDboUpdateManyMutationInput,
-            _i3.TaskDboUncheckedUpdateManyInput>
+            _i3.ProjectTaskDboUncheckedUpdateManyInput>
         data,
-    _i3.TaskDboWhereInput? where,
+    _i3.ProjectTaskDboWhereInput? where,
   }) {
     final args = {
       'data': data,
@@ -1819,7 +1826,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.updateMany,
       datamodel: PrismaClient.datamodel,
     );
@@ -1829,22 +1836,22 @@ class TaskDboDelegate {
       transaction: _client.$transaction.transaction,
     );
     return _i1.ActionClient<_i3.AffectedRowsOutput>(
-      action: 'updateManyTaskDbo',
+      action: 'updateManyProjectTaskDbo',
       result: result,
       factory: (e) => _i3.AffectedRowsOutput.fromJson(e),
     );
   }
 
-  _i1.ActionClient<_i2.TaskDbo> upsert({
+  _i1.ActionClient<_i2.ProjectTaskDbo> upsert({
-    required _i3.TaskDboWhereUniqueInput where,
+    required _i3.ProjectTaskDboWhereUniqueInput where,
-    required _i1
+    required _i1.PrismaUnion<_i3.ProjectTaskDboCreateInput,
-        .PrismaUnion<_i3.TaskDboCreateInput, _i3.TaskDboUncheckedCreateInput>
+            _i3.ProjectTaskDboUncheckedCreateInput>
         create,
-    required _i1
+    required _i1.PrismaUnion<_i3.ProjectTaskDboUpdateInput,
-        .PrismaUnion<_i3.TaskDboUpdateInput, _i3.TaskDboUncheckedUpdateInput>
+            _i3.ProjectTaskDboUncheckedUpdateInput>
         update,
-    _i3.TaskDboSelect? select,
+    _i3.ProjectTaskDboSelect? select,
-    _i3.TaskDboInclude? include,
+    _i3.ProjectTaskDboInclude? include,
   }) {
     final args = {
       'where': where,
@@ -1855,7 +1862,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.upsertOne,
       datamodel: PrismaClient.datamodel,
     );
@@ -1864,17 +1871,17 @@ class TaskDboDelegate {
       headers: _client.$transaction.headers,
       transaction: _client.$transaction.transaction,
     );
-    return _i1.ActionClient<_i2.TaskDbo>(
+    return _i1.ActionClient<_i2.ProjectTaskDbo>(
-      action: 'upsertOneTaskDbo',
+      action: 'upsertOneProjectTaskDbo',
       result: result,
-      factory: (e) => _i2.TaskDbo.fromJson(e),
+      factory: (e) => _i2.ProjectTaskDbo.fromJson(e),
     );
   }
 
-  _i1.ActionClient<_i2.TaskDbo?> delete({
+  _i1.ActionClient<_i2.ProjectTaskDbo?> delete({
-    required _i3.TaskDboWhereUniqueInput where,
+    required _i3.ProjectTaskDboWhereUniqueInput where,
-    _i3.TaskDboSelect? select,
+    _i3.ProjectTaskDboSelect? select,
-    _i3.TaskDboInclude? include,
+    _i3.ProjectTaskDboInclude? include,
   }) {
     final args = {
       'where': where,
@@ -1883,7 +1890,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.deleteOne,
       datamodel: PrismaClient.datamodel,
     );
@@ -1892,19 +1899,19 @@ class TaskDboDelegate {
       headers: _client.$transaction.headers,
       transaction: _client.$transaction.transaction,
     );
-    return _i1.ActionClient<_i2.TaskDbo?>(
+    return _i1.ActionClient<_i2.ProjectTaskDbo?>(
-      action: 'deleteOneTaskDbo',
+      action: 'deleteOneProjectTaskDbo',
       result: result,
-      factory: (e) => e != null ? _i2.TaskDbo.fromJson(e) : null,
+      factory: (e) => e != null ? _i2.ProjectTaskDbo.fromJson(e) : null,
     );
   }
 
   _i1.ActionClient<_i3.AffectedRowsOutput> deleteMany(
-      {_i3.TaskDboWhereInput? where}) {
+      {_i3.ProjectTaskDboWhereInput? where}) {
     final args = {'where': where};
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.deleteMany,
       datamodel: PrismaClient.datamodel,
     );
@@ -1914,22 +1921,24 @@ class TaskDboDelegate {
       transaction: _client.$transaction.transaction,
     );
     return _i1.ActionClient<_i3.AffectedRowsOutput>(
-      action: 'deleteManyTaskDbo',
+      action: 'deleteManyProjectTaskDbo',
       result: result,
       factory: (e) => _i3.AffectedRowsOutput.fromJson(e),
     );
   }
 
-  _i1.ActionClient<Iterable<_i3.TaskDboGroupByOutputType>> groupBy({
+  _i1.ActionClient<Iterable<_i3.ProjectTaskDboGroupByOutputType>> groupBy({
-    _i3.TaskDboWhereInput? where,
+    _i3.ProjectTaskDboWhereInput? where,
-    _i1.PrismaUnion<Iterable<_i3.TaskDboOrderByWithAggregationInput>,
+    _i1.PrismaUnion<Iterable<_i3.ProjectTaskDboOrderByWithAggregationInput>,
-            _i3.TaskDboOrderByWithAggregationInput>?
+            _i3.ProjectTaskDboOrderByWithAggregationInput>?
         orderBy,
-    required _i1.PrismaUnion<Iterable<_i3.TaskDboScalar>, _i3.TaskDboScalar> by,
+    required _i1.PrismaUnion<Iterable<_i3.ProjectTaskDboScalar>,
-    _i3.TaskDboScalarWhereWithAggregatesInput? having,
+            _i3.ProjectTaskDboScalar>
+        by,
+    _i3.ProjectTaskDboScalarWhereWithAggregatesInput? having,
     int? take,
     int? skip,
-    _i3.TaskDboGroupByOutputTypeSelect? select,
+    _i3.ProjectTaskDboGroupByOutputTypeSelect? select,
   }) {
     final args = {
       'where': where,
@@ -1942,7 +1951,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.groupBy,
       datamodel: PrismaClient.datamodel,
     );
@@ -1951,23 +1960,23 @@ class TaskDboDelegate {
       headers: _client.$transaction.headers,
       transaction: _client.$transaction.transaction,
     );
-    return _i1.ActionClient<Iterable<_i3.TaskDboGroupByOutputType>>(
+    return _i1.ActionClient<Iterable<_i3.ProjectTaskDboGroupByOutputType>>(
-      action: 'groupByTaskDbo',
+      action: 'groupByProjectTaskDbo',
       result: result,
       factory: (values) => (values as Iterable)
-          .map((e) => _i3.TaskDboGroupByOutputType.fromJson(e)),
+          .map((e) => _i3.ProjectTaskDboGroupByOutputType.fromJson(e)),
     );
   }
 
-  _i1.ActionClient<_i3.AggregateTaskDbo> aggregate({
+  _i1.ActionClient<_i3.AggregateProjectTaskDbo> aggregate({
-    _i3.TaskDboWhereInput? where,
+    _i3.ProjectTaskDboWhereInput? where,
-    _i1.PrismaUnion<Iterable<_i3.TaskDboOrderByWithRelationInput>,
+    _i1.PrismaUnion<Iterable<_i3.ProjectTaskDboOrderByWithRelationInput>,
-            _i3.TaskDboOrderByWithRelationInput>?
+            _i3.ProjectTaskDboOrderByWithRelationInput>?
         orderBy,
-    _i3.TaskDboWhereUniqueInput? cursor,
+    _i3.ProjectTaskDboWhereUniqueInput? cursor,
     int? take,
     int? skip,
-    _i3.AggregateTaskDboSelect? select,
+    _i3.AggregateProjectTaskDboSelect? select,
   }) {
     final args = {
       'where': where,
@@ -1979,7 +1988,7 @@ class TaskDboDelegate {
     };
     final query = _i1.serializeJsonQuery(
       args: args,
-      modelName: 'TaskDbo',
+      modelName: 'ProjectTaskDbo',
       action: _i1.JsonQueryAction.aggregate,
       datamodel: PrismaClient.datamodel,
     );
@@ -1988,10 +1997,10 @@ class TaskDboDelegate {
       headers: _client.$transaction.headers,
       transaction: _client.$transaction.transaction,
     );
-    return _i1.ActionClient<_i3.AggregateTaskDbo>(
+    return _i1.ActionClient<_i3.AggregateProjectTaskDbo>(
-      action: 'aggregateTaskDbo',
+      action: 'aggregateProjectTaskDbo',
       result: result,
-      factory: (e) => _i3.AggregateTaskDbo.fromJson(e),
+      factory: (e) => _i3.AggregateProjectTaskDbo.fromJson(e),
     );
   }
 }
@@ -2219,9 +2228,9 @@ class PrismaClient extends _i1.BasePrismaClient<PrismaClient> {
             'isId': false,
             'isReadOnly': false,
             'hasDefaultValue': false,
-            'type': 'TaskDbo',
+            'type': 'ProjectTaskDbo',
             'nativeType': null,
-            'relationName': 'ProjectDboToTaskDbo',
+            'relationName': 'ProjectDboToProjectTaskDbo',
             'relationFromFields': [],
             'relationToFields': [],
             'isGenerated': false,
@@ -2479,7 +2488,7 @@ class PrismaClient extends _i1.BasePrismaClient<PrismaClient> {
         'isGenerated': false,
       },
       {
-        'name': 'TaskDbo',
+        'name': 'ProjectTaskDbo',
         'dbName': null,
         'schema': null,
         'fields': [
@@ -2540,7 +2549,7 @@ class PrismaClient extends _i1.BasePrismaClient<PrismaClient> {
             'hasDefaultValue': false,
             'type': 'ProjectDbo',
             'nativeType': null,
-            'relationName': 'ProjectDboToTaskDbo',
+            'relationName': 'ProjectDboToProjectTaskDbo',
             'relationFromFields': ['projectId'],
             'relationToFields': ['id'],
             'isGenerated': false,
@@ -2634,7 +2643,7 @@ class PrismaClient extends _i1.BasePrismaClient<PrismaClient> {
         ],
       },
       {
-        'model': 'TaskDbo',
+        'model': 'ProjectTaskDbo',
         'type': 'id',
         'isDefinedOnField': true,
         'fields': [
@@ -2671,7 +2680,7 @@ class PrismaClient extends _i1.BasePrismaClient<PrismaClient> {
   @override
   get $engine => _engine ??= _i5.BinaryEngine(
         schema:
-            'generator dartClient {\n  provider = "dart run orm"\n  output   = "../lib/infrastructure/persistence/db"\n}\n\ndatasource db {\n  provider = "postgresql"\n  url      = env("DATABASE_URL")\n}\n\n// User Model\nmodel UserDbo {\n  id          String         @id @default(uuid())\n  name        String\n  email       String         @unique\n  password    String\n  projects    ProjectDbo[] // Beziehung zu Projekten\n  timeEntries TimeEntryDbo[] // Beziehung zu Zeiteinträgen\n  createdAt   DateTime       @default(now())\n  updatedAt   DateTime       @updatedAt\n}\n\n// Project Model\nmodel ProjectDbo {\n  id          String         @id @default(uuid())\n  name        String\n  description String?\n  clientId    String?\n  tasks       TaskDbo[] // Beziehung zu Aufgaben\n  timeEntries TimeEntryDbo[] // Beziehung zu Zeiteinträgen\n  user        UserDbo        @relation(fields: [userId], references: [id])\n  userId      String\n  createdAt   DateTime       @default(now())\n  updatedAt   DateTime       @updatedAt\n}\n\n// TimeEntry Model\nmodel TimeEntryDbo {\n  id          String     @id @default(uuid())\n  startTime   DateTime\n  endTime     DateTime\n  description String?\n  user        UserDbo    @relation(fields: [userId], references: [id])\n  userId      String\n  project     ProjectDbo @relation(fields: [projectId], references: [id])\n  projectId   String\n  createdAt   DateTime   @default(now())\n  updatedAt   DateTime   @updatedAt\n}\n\n// Task Model (optional)\nmodel TaskDbo {\n  id          String     @id @default(uuid())\n  name        String\n  description String?\n  project     ProjectDbo @relation(fields: [projectId], references: [id])\n  projectId   String\n  createdAt   DateTime   @default(now())\n  updatedAt   DateTime   @updatedAt\n}\n',
+            'generator dartClient {\n  provider = "dart run orm"\n  output   = "../lib/infrastructure/persistence/db"\n}\n\ndatasource db {\n  provider = "postgresql"\n  url      = env("DATABASE_URL")\n}\n\n// User Model\nmodel UserDbo {\n  id          String         @id @default(uuid())\n  name        String\n  email       String         @unique\n  password    String\n  projects    ProjectDbo[] // Beziehung zu Projekten\n  timeEntries TimeEntryDbo[] // Beziehung zu Zeiteinträgen\n  createdAt   DateTime       @default(now())\n  updatedAt   DateTime       @updatedAt\n}\n\n// Project Model\nmodel ProjectDbo {\n  id          String           @id @default(uuid())\n  name        String\n  description String?\n  clientId    String?\n  tasks       ProjectTaskDbo[] // Beziehung zu Aufgaben\n  timeEntries TimeEntryDbo[] // Beziehung zu Zeiteinträgen\n  user        UserDbo          @relation(fields: [userId], references: [id])\n  userId      String\n  createdAt   DateTime         @default(now())\n  updatedAt   DateTime         @updatedAt\n}\n\n// TimeEntry Model\nmodel TimeEntryDbo {\n  id          String     @id @default(uuid())\n  startTime   DateTime\n  endTime     DateTime\n  description String?\n  user        UserDbo    @relation(fields: [userId], references: [id])\n  userId      String\n  project     ProjectDbo @relation(fields: [projectId], references: [id])\n  projectId   String\n  createdAt   DateTime   @default(now())\n  updatedAt   DateTime   @updatedAt\n}\n\n// Task Model (optional)\nmodel ProjectTaskDbo {\n  id          String     @id @default(uuid())\n  name        String\n  description String?\n  project     ProjectDbo @relation(fields: [projectId], references: [id])\n  projectId   String\n  createdAt   DateTime   @default(now())\n  updatedAt   DateTime   @updatedAt\n}\n',
         datasources: const {
           'db': _i1.Datasource(
             _i1.DatasourceType.environment,
@@ -2690,5 +2699,5 @@ class PrismaClient extends _i1.BasePrismaClient<PrismaClient> {
 
   TimeEntryDboDelegate get timeEntryDbo => TimeEntryDboDelegate._(this);
 
-  TaskDboDelegate get taskDbo => TaskDboDelegate._(this);
+  ProjectTaskDboDelegate get projectTaskDbo => ProjectTaskDboDelegate._(this);
 }

backend-dart/lib/infrastructure/persistence/db/model.dart

@@ -2,8 +2,8 @@
 import 'model.dart' as _i1;
 import 'prisma.dart' as _i2;
 
-class TaskDbo {
+class ProjectTaskDbo {
-  const TaskDbo({
+  const ProjectTaskDbo({
     this.id,
     this.name,
     this.description,
@@ -13,7 +13,7 @@ class TaskDbo {
     this.project,
   });
 
-  factory TaskDbo.fromJson(Map json) => TaskDbo(
+  factory ProjectTaskDbo.fromJson(Map json) => ProjectTaskDbo(
         id: json['id'],
         name: json['name'],
         description: json['description'],
@@ -169,7 +169,7 @@ class ProjectDbo {
           _ => json['updatedAt']
         },
         tasks: (json['tasks'] as Iterable?)
-            ?.map((json) => _i1.TaskDbo.fromJson(json)),
+            ?.map((json) => _i1.ProjectTaskDbo.fromJson(json)),
         timeEntries: (json['timeEntries'] as Iterable?)
             ?.map((json) => _i1.TimeEntryDbo.fromJson(json)),
         user: json['user'] is Map ? _i1.UserDbo.fromJson(json['user']) : null,
@@ -192,7 +192,7 @@ class ProjectDbo {
 
   final DateTime? updatedAt;
 
-  final Iterable<_i1.TaskDbo>? tasks;
+  final Iterable<_i1.ProjectTaskDbo>? tasks;
 
   final Iterable<_i1.TimeEntryDbo>? timeEntries;
 
@@ -473,8 +473,8 @@ class CreateManyTimeEntryDboAndReturnOutputType {
       };
 }
 
-class CreateManyTaskDboAndReturnOutputType {
+class CreateManyProjectTaskDboAndReturnOutputType {
-  const CreateManyTaskDboAndReturnOutputType({
+  const CreateManyProjectTaskDboAndReturnOutputType({
     this.id,
     this.name,
     this.description,
@@ -484,8 +484,8 @@ class CreateManyTaskDboAndReturnOutputType {
     this.project,
   });
 
-  factory CreateManyTaskDboAndReturnOutputType.fromJson(Map json) =>
+  factory CreateManyProjectTaskDboAndReturnOutputType.fromJson(Map json) =>
-      CreateManyTaskDboAndReturnOutputType(
+      CreateManyProjectTaskDboAndReturnOutputType(
         id: json['id'],
         name: json['name'],
         description: json['description'],

backend-dart/lib/infrastructure/persistence/mapper/project_dbo_mapper.dart

@@ -7,18 +7,6 @@ import 'package:fpdart/fpdart.dart';
 import 'package:orm/orm.dart';
 
 class ProjectDboMapper {
-  TaskEither<IError, ProjectDbo> toDbo(Project project) {
-    return TaskEither.of(ProjectDbo(
-      id: project.id,
-      name: project.name,
-      description: project.description,
-      clientId: project.clientId,
-      userId: project.userId,
-      createdAt: project.createdAt,
-      updatedAt: project.updatedAt,
-    ));
-  }
-
   TaskEither<IError, Project> fromDbo(ProjectDbo dbo) {
     return TaskEither.of(Project(
       id: dbo.id!,
@@ -31,9 +19,14 @@ class ProjectDboMapper {
     ));
   }
 
+  TaskEither<IError, List<Project>> listFrom(Iterable<ProjectDbo> dbos) {
+    return TaskEither.traverseList(dbos.toList(), fromDbo);
+  }
+
   TaskEither<IError, ProjectDboCreateInput> fromCreatetoDbo(
       ProjectCreate project) {
     return TaskEither.of(ProjectDboCreateInput(
+      id: project.id,
       name: project.name,
       description: project.description.let(PrismaUnion.$1),
       clientId: project.clientId.let(PrismaUnion.$1),
@@ -57,8 +50,4 @@ class ProjectDboMapper {
       ),
     ));
   }
-
-  TaskEither<IError, List<Project>> listFrom(Iterable<ProjectDbo> dbos) {
-    return TaskEither.traverseList(dbos.toList(), fromDbo);
-  }
 }

backend-dart/lib/infrastructure/persistence/mapper/project_task_dbo_mapper.dart

@@ -0,0 +1,52 @@
+import 'package:backend_dart/common/extensions.dart';
+import 'package:backend_dart/domain/entities/project_task.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/infrastructure/persistence/db/model.dart';
+import 'package:backend_dart/infrastructure/persistence/db/prisma.dart';
+import 'package:fpdart/fpdart.dart';
+import 'package:orm/orm.dart';
+
+class ProjectTaskDboMapper {
+  TaskEither<IError, ProjectTask> from(ProjectTaskDbo target) =>
+      TaskEither.of(ProjectTask(
+        id: target.id!,
+        name: target.name!,
+        description: target.description,
+        projectId: target.projectId!,
+        createdAt: target.createdAt!,
+        updatedAt: target.updatedAt!,
+      ));
+
+  TaskEither<IError, List<ProjectTask>> listFrom(
+      Iterable<ProjectTaskDbo> targets) {
+    return TaskEither.traverseList(targets.toList(), from);
+  }
+
+  TaskEither<IError, ProjectTaskDboCreateInput> fromCreateTo(
+          ProjectTaskCreate origin) =>
+      TaskEither.of(ProjectTaskDboCreateInput(
+        id: origin.id,
+        name: origin.name,
+        description: origin.description.let(PrismaUnion.$1),
+        project: ProjectDboCreateNestedOneWithoutTasksInput(
+          connect: ProjectDboWhereUniqueInput(
+            id: origin.projectId,
+          ),
+        ),
+      ));
+
+  TaskEither<IError, ProjectTaskDboUpdateInput> fromUpdateTo(
+          ProjectTaskUpdate origin) =>
+      TaskEither.of(ProjectTaskDboUpdateInput(
+        id: PrismaUnion.$1(origin.id),
+        name: origin.name?.let(PrismaUnion.$1),
+        description: origin.description?.let(PrismaUnion.$1),
+        project: origin.projectId?.let(
+          (projectId) => ProjectDboUpdateOneRequiredWithoutTasksNestedInput(
+            connect: ProjectDboWhereUniqueInput(
+              id: projectId,
+            ),
+          ),
+        ),
+      ));
+}

backend-dart/lib/infrastructure/persistence/mapper/time_entry_dbo_mapper.dart

@@ -0,0 +1,69 @@
+import 'package:backend_dart/common/extensions.dart';
+import 'package:backend_dart/domain/entities/time_entry.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/infrastructure/persistence/db/model.dart';
+import 'package:backend_dart/infrastructure/persistence/db/prisma.dart';
+import 'package:fpdart/fpdart.dart';
+import 'package:orm/orm.dart';
+
+class TimeEntryDboMapper {
+  TaskEither<IError, TimeEntry> from(TimeEntryDbo target) => TaskEither.of(
+        TimeEntry(
+          id: target.id!,
+          startTime: target.startTime!,
+          endTime: target.endTime!,
+          description: target.description,
+          userId: target.userId!,
+          projectId: target.projectId!,
+          createdAt: target.createdAt!,
+          updatedAt: target.updatedAt!,
+        ),
+      );
+
+  TaskEither<IError, List<TimeEntry>> listFrom(Iterable<TimeEntryDbo> targets) {
+    return TaskEither.traverseList(targets.toList(), from);
+  }
+
+  TaskEither<IError, TimeEntryDboCreateInput> fromCreateTo(
+          TimeEntryCreate origin) =>
+      TaskEither.of(TimeEntryDboCreateInput(
+        id: origin.id,
+        startTime: origin.startTime,
+        endTime: origin.endTime,
+        description: origin.description.let(PrismaUnion.$1),
+        user: UserDboCreateNestedOneWithoutTimeEntriesInput(
+          connect: UserDboWhereUniqueInput(
+            id: origin.userId,
+          ),
+        ),
+        project: ProjectDboCreateNestedOneWithoutTimeEntriesInput(
+          connect: ProjectDboWhereUniqueInput(
+            id: origin.projectId,
+          ),
+        ),
+      ));
+
+  TaskEither<IError, TimeEntryDboUpdateInput> fromUpdateTo(
+          TimeEntryUpdate origin) =>
+      TaskEither.of(TimeEntryDboUpdateInput(
+        id: PrismaUnion.$1(origin.id),
+        startTime: origin.startTime?.let(PrismaUnion.$1),
+        endTime: origin.endTime?.let(PrismaUnion.$1),
+        description: origin.description?.let(PrismaUnion.$1),
+        user: origin.userId?.let(
+          (userId) => UserDboUpdateOneRequiredWithoutTimeEntriesNestedInput(
+            connect: UserDboWhereUniqueInput(
+              id: userId,
+            ),
+          ),
+        ),
+        project: origin.projectId?.let(
+          (projectId) =>
+              ProjectDboUpdateOneRequiredWithoutTimeEntriesNestedInput(
+            connect: ProjectDboWhereUniqueInput(
+              id: projectId,
+            ),
+          ),
+        ),
+      ));
+}

backend-dart/lib/infrastructure/persistence/prisma_database.dart

@@ -1,18 +1,37 @@
 import 'package:backend_dart/domain/data/database.dart';
+import 'package:backend_dart/domain/data/project_data_source.dart';
+import 'package:backend_dart/domain/data/project_task_data_source.dart';
+import 'package:backend_dart/domain/data/time_entry_data_source.dart';
 import 'package:backend_dart/infrastructure/persistence/db/client.dart';
+import 'package:backend_dart/infrastructure/persistence/prisma_project_data_source.dart';
+import 'package:backend_dart/infrastructure/persistence/prisma_project_task_data_source.dart';
+import 'package:backend_dart/infrastructure/persistence/prisma_time_entry_data_source.dart';
 import 'package:backend_dart/infrastructure/persistence/prisma_user_data_source.dart';
 
 class PrismaDatabase implements IDatabase {
   final prisma = PrismaClient();
   late final PrismaUserDataSource _users;
+  late final TimeEntryDataSource _timeEntries;
+  late final ProjectTaskDataSource _tasks;
+  late final ProjectDataSource _projects;
+
   PrismaDatabase() {
     _users = PrismaUserDataSource(prisma);
+    _timeEntries = PrismaTimeEntryDataSource(prisma);
+    _tasks = PrismaProjectTaskDataSource(prisma);
+    _projects = PrismaProjectDataSource(prisma);
     print('Database initialized');
   }
 
   @override
   get users => _users;
   @override
+  get timeEntries => _timeEntries;
+  @override
+  get tasks => _tasks;
+  @override
+  get projects => _projects;
+  @override
   Future<void> close() {
     return Future.value();
   }

backend-dart/lib/infrastructure/persistence/prisma_project_data_source.dart

@@ -9,6 +9,7 @@ import 'package:backend_dart/infrastructure/persistence/db/prisma.dart';
 import 'package:backend_dart/infrastructure/persistence/mapper/project_dbo_mapper.dart';
 import 'package:fpdart/fpdart.dart';
 import 'package:orm/orm.dart';
+import 'package:uuid/uuid.dart';
 
 class PrismaProjectDataSource implements ProjectDataSource {
   final PrismaClient prisma;
@@ -17,7 +18,7 @@ class PrismaProjectDataSource implements ProjectDataSource {
   PrismaProjectDataSource(this.prisma);
 
   @override
-  TaskEither<IError, Project> createProject(ProjectCreate project) {
+  TaskEither<IError, Project> create(ProjectCreate project) {
     return mapper
         .fromCreatetoDbo(project)
         .flatMap((projectDbo) => TaskEither.tryCatch(
@@ -34,7 +35,7 @@ class PrismaProjectDataSource implements ProjectDataSource {
   }
 
   @override
-  TaskEither<IError, Project> findProjectById(String id) {
+  TaskEither<IError, Project> findById(String id) {
     return TaskEither<IError, ProjectDbo?>.tryCatch(
       () async {
         final project = await prisma.projectDbo
@@ -51,7 +52,7 @@ class PrismaProjectDataSource implements ProjectDataSource {
   }
 
   @override
-  TaskEither<IError, List<Project>> findProjectsByUserId(String userId) {
+  TaskEither<IError, List<Project>> findByUserId(String userId) {
     return TaskEither<IError, Iterable<ProjectDbo>>.tryCatch(
       () async {
         final projects = await prisma.projectDbo.findMany(
@@ -69,7 +70,7 @@ class PrismaProjectDataSource implements ProjectDataSource {
   }
 
   @override
-  TaskEither<IError, Project> updateProject(ProjectUpdate project) {
+  TaskEither<IError, Project> update(ProjectUpdate project) {
     return mapper
         .fromUpdateToDbo(project)
         .flatMap(
@@ -96,7 +97,7 @@ class PrismaProjectDataSource implements ProjectDataSource {
   }
 
   @override
-  TaskEither<IError, Project> deleteProject(String id) {
+  TaskEither<IError, Project> delete(String id) {
     return TaskEither<IError, ProjectDbo?>.tryCatch(
       () async {
         return await prisma.projectDbo
@@ -117,7 +118,7 @@ class PrismaProjectDataSource implements ProjectDataSource {
   }
 
   @override
-  TaskEither<IError, List<Project>> findAllProjects() {
+  TaskEither<IError, List<Project>> findAll() {
     return TaskEither<IError, Iterable<ProjectDbo>>.tryCatch(
       () async => await prisma.projectDbo.findMany(),
       (error, _) => AppError.databaseError(
@@ -125,4 +126,23 @@ class PrismaProjectDataSource implements ProjectDataSource {
       ),
     ).flatMap(mapper.listFrom);
   }
+
+  @override
+  TaskEither<IError, String> generateId() {
+    return TaskEither.tryCatch(
+      () async {
+        var uuid = Uuid();
+        do {
+          final id = uuid.v4();
+          final project = await prisma.projectDbo.findUnique(
+            where: ProjectDboWhereUniqueInput(id: id),
+          );
+          if (project == null) return id;
+        } while (true);
+      },
+      (error, _) => AppError.databaseError(
+        message: 'Failed to generate ID: ${error.toString()}',
+      ),
+    );
+  }
 }

backend-dart/lib/infrastructure/persistence/prisma_project_task_data_source.dart

@@ -0,0 +1,139 @@
+import 'package:backend_dart/common/error_on_null.dart';
+import 'package:backend_dart/domain/data/project_task_data_source.dart';
+import 'package:backend_dart/domain/entities/project_task.dart';
+import 'package:backend_dart/domain/errors/app_error.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/infrastructure/persistence/db/client.dart';
+import 'package:backend_dart/infrastructure/persistence/db/model.dart';
+import 'package:backend_dart/infrastructure/persistence/db/prisma.dart';
+import 'package:backend_dart/infrastructure/persistence/mapper/project_task_dbo_mapper.dart';
+import 'package:fpdart/fpdart.dart';
+import 'package:orm/orm.dart';
+import 'package:uuid/uuid.dart';
+
+class PrismaProjectTaskDataSource implements ProjectTaskDataSource {
+  final PrismaClient prisma;
+  final ProjectTaskDboMapper mapper = ProjectTaskDboMapper();
+
+  PrismaProjectTaskDataSource(this.prisma);
+
+  @override
+  TaskEither<IError, ProjectTask> create(ProjectTaskCreate task) =>
+      mapper.fromCreateTo(task).flatMap(
+            (taskDbo) => TaskEither<IError, ProjectTaskDbo>.tryCatch(
+              () async {
+                final createdTask = await prisma.projectTaskDbo.create(
+                  data: PrismaUnion.$1(taskDbo),
+                );
+                return createdTask;
+              },
+              (error, _) => AppError.databaseError(
+                message: 'Failed to create project task: ${error.toString()}',
+              ),
+            ).flatMap(mapper.from),
+          );
+
+  @override
+  TaskEither<IError, ProjectTask> findById(String id) {
+    return TaskEither<IError, ProjectTaskDbo?>.tryCatch(
+      () async {
+        final task = await prisma.projectTaskDbo
+            .findUnique(where: ProjectTaskDboWhereUniqueInput(id: id));
+        return task;
+      },
+      (error, _) => AppError.databaseError(
+        message: 'Failed to find project task by ID: ${error.toString()}',
+      ),
+    )
+        .flatMap(errorOnNull(AppError.notFound(
+          "Project task with id $id not found",
+        )))
+        .flatMap(mapper.from);
+  }
+
+  @override
+  TaskEither<IError, List<ProjectTask>> findByProjectId(String projectId) {
+    return TaskEither<IError, Iterable<ProjectTaskDbo>>.tryCatch(
+      () async => await prisma.projectTaskDbo.findMany(
+        where: ProjectTaskDboWhereInput(projectId: PrismaUnion.$2(projectId)),
+      ),
+      (error, _) => AppError.databaseError(
+        message:
+            'Failed to fetch tasks for project $projectId: ${error.toString()}',
+      ),
+    ).flatMap(mapper.listFrom);
+  }
+
+  @override
+  TaskEither<IError, ProjectTask> update(ProjectTaskUpdate task) => mapper
+      .fromUpdateTo(task)
+      .flatMap(
+        (taskDbo) => TaskEither.tryCatch(
+          () async {
+            final updatedTask = await prisma.projectTaskDbo.update(
+              data: PrismaUnion.$1(taskDbo),
+              where: ProjectTaskDboWhereUniqueInput(id: task.id),
+            );
+            return updatedTask;
+          },
+          (error, _) => AppError.databaseError(
+            message: 'Failed to update project task: ${error.toString()}',
+          ),
+        ),
+      )
+      .flatMap(
+        errorOnNull(AppError.notFound("Project task not found")),
+      )
+      .flatMap(mapper.from);
+
+  @override
+  TaskEither<IError, ProjectTask> delete(String id) {
+    return TaskEither<IError, ProjectTaskDbo?>.tryCatch(
+      () async {
+        return await prisma.projectTaskDbo.delete(
+          where: ProjectTaskDboWhereUniqueInput(id: id),
+        );
+      },
+      (error, _) => AppError.databaseError(
+        message: 'Failed to delete project task: ${error.toString()}',
+      ),
+    )
+        .flatMap(
+          errorOnNull(
+            AppError.notFound(
+              'Project task with ID $id not found',
+            ),
+          ),
+        )
+        .flatMap(mapper.from);
+  }
+
+  @override
+  TaskEither<IError, List<ProjectTask>> findAll() {
+    return TaskEither<IError, Iterable<ProjectTaskDbo>>.tryCatch(
+      () async => await prisma.projectTaskDbo.findMany(),
+      (error, _) => AppError.databaseError(
+        message: 'Failed to fetch all project tasks: ${error.toString()}',
+      ),
+    ).flatMap(mapper.listFrom);
+  }
+
+  @override
+  TaskEither<IError, String> generateId() {
+    return TaskEither.tryCatch(
+      () async {
+        var uuid = Uuid();
+        do {
+          final id = uuid.v4();
+          final task = await prisma.projectTaskDbo.findUnique(
+            where: ProjectTaskDboWhereUniqueInput(id: id),
+          );
+          if (task == null) return id;
+        } while (true);
+      },
+      (error, _) => AppError.databaseError(
+        message: 'Failed to generate ID: ${error.toString()}',
+      ),
+    );
+  }
+}

backend-dart/lib/infrastructure/persistence/prisma_time_entry_data_source.dart

@@ -0,0 +1,150 @@
+import 'package:backend_dart/common/error_on_null.dart';
+import 'package:backend_dart/domain/data/time_entry_data_source.dart';
+import 'package:backend_dart/domain/entities/time_entry.dart';
+import 'package:backend_dart/domain/errors/app_error.dart';
+import 'package:backend_dart/domain/interface/error.dart';
+import 'package:backend_dart/infrastructure/persistence/db/client.dart';
+import 'package:backend_dart/infrastructure/persistence/db/model.dart';
+import 'package:backend_dart/infrastructure/persistence/db/prisma.dart';
+import 'package:backend_dart/infrastructure/persistence/mapper/time_entry_dbo_mapper.dart';
+import 'package:fpdart/fpdart.dart';
+import 'package:orm/orm.dart';
+import 'package:uuid/uuid.dart';
+
+class PrismaTimeEntryDataSource implements TimeEntryDataSource {
+  final PrismaClient prisma;
+  final TimeEntryDboMapper mapper = TimeEntryDboMapper();
+
+  PrismaTimeEntryDataSource(this.prisma);
+
+  @override
+  TaskEither<IError, TimeEntry> create(TimeEntryCreate timeEntry) =>
+      mapper.fromCreateTo(timeEntry).flatMap(
+            (timeEntryDbo) => TaskEither<IError, TimeEntryDbo>.tryCatch(
+              () async {
+                final createdEntry = await prisma.timeEntryDbo.create(
+                  data: PrismaUnion.$1(timeEntryDbo),
+                );
+                return createdEntry;
+              },
+              (error, _) => AppError.databaseError(
+                message: 'Failed to create time entry: ${error.toString()}',
+              ),
+            ).flatMap(mapper.from),
+          );
+
+  @override
+  TaskEither<IError, TimeEntry> findById(String id) {
+    return TaskEither<IError, TimeEntryDbo?>.tryCatch(
+      () async {
+        final timeEntry = await prisma.timeEntryDbo
+            .findUnique(where: TimeEntryDboWhereUniqueInput(id: id));
+        return timeEntry;
+      },
+      (error, _) => AppError.databaseError(
+        message: 'Failed to find time entry by ID: ${error.toString()}',
+      ),
+    )
+        .flatMap(errorOnNull(AppError.notFound(
+          "Time entry with id $id not found",
+        )))
+        .flatMap(mapper.from);
+  }
+
+  @override
+  TaskEither<IError, List<TimeEntry>> findByUserId(String userId) {
+    return TaskEither<IError, Iterable<TimeEntryDbo>>.tryCatch(
+      () async => await prisma.timeEntryDbo.findMany(
+        where: TimeEntryDboWhereInput(userId: PrismaUnion.$2(userId)),
+      ),
+      (error, _) => AppError.databaseError(
+        message:
+            'Failed to fetch time entries for user $userId: ${error.toString()}',
+      ),
+    ).flatMap(mapper.listFrom);
+  }
+
+  @override
+  TaskEither<IError, List<TimeEntry>> findByProjectId(String projectId) {
+    return TaskEither<IError, Iterable<TimeEntryDbo>>.tryCatch(
+      () async => await prisma.timeEntryDbo.findMany(
+        where: TimeEntryDboWhereInput(projectId: PrismaUnion.$2(projectId)),
+      ),
+      (error, _) => AppError.databaseError(
+        message:
+            'Failed to fetch time entries for project $projectId: ${error.toString()}',
+      ),
+    ).flatMap(mapper.listFrom);
+  }
+
+  @override
+  TaskEither<IError, TimeEntry> update(TimeEntryUpdate timeEntry) => mapper
+      .fromUpdateTo(timeEntry)
+      .flatMap(
+        (timeEntryDbo) => TaskEither.tryCatch(
+          () async {
+            final updatedEntry = await prisma.timeEntryDbo.update(
+              data: PrismaUnion.$1(timeEntryDbo),
+              where: TimeEntryDboWhereUniqueInput(id: timeEntry.id),
+            );
+            return updatedEntry;
+          },
+          (error, _) => AppError.databaseError(
+            message: 'Failed to update time entry: ${error.toString()}',
+          ),
+        ),
+      )
+      .flatMap(
+        errorOnNull(AppError.notFound("Time entry not found")),
+      )
+      .flatMap(mapper.from);
+
+  @override
+  TaskEither<IError, TimeEntry> delete(String id) {
+    return TaskEither<IError, TimeEntryDbo?>.tryCatch(
+      () async {
+        return await prisma.timeEntryDbo.delete(
+          where: TimeEntryDboWhereUniqueInput(id: id),
+        );
+      },
+      (error, _) => AppError.databaseError(
+        message: 'Failed to delete time entry: ${error.toString()}',
+      ),
+    )
+        .flatMap(
+          errorOnNull(AppError.notFound(
+            "Time entry with id $id not found",
+          )),
+        )
+        .flatMap(mapper.from);
+  }
+
+  @override
+  TaskEither<IError, List<TimeEntry>> findAll() {
+    return TaskEither<IError, Iterable<TimeEntryDbo>>.tryCatch(
+      () async => await prisma.timeEntryDbo.findMany(),
+      (error, _) => AppError.databaseError(
+        message: 'Failed to fetch all time entries: ${error.toString()}',
+      ),
+    ).flatMap(mapper.listFrom);
+  }
+
+  @override
+  TaskEither<IError, String> generateId() {
+    return TaskEither.tryCatch(
+      () async {
+        var uuid = Uuid();
+        do {
+          final id = uuid.v4();
+          final entry = await prisma.timeEntryDbo.findUnique(
+            where: TimeEntryDboWhereUniqueInput(id: id),
+          );
+          if (entry == null) return id;
+        } while (true);
+      },
+      (error, _) => AppError.databaseError(
+        message: 'Failed to generate ID: ${error.toString()}',
+      ),
+    );
+  }
+}

backend-dart/lib/interfaces/http/router.dart

@@ -1,4 +1,4 @@
-import 'package:backend_dart/application/service/user_service_provider.dart';
+import 'package:backend_dart/application/service/service_provider.dart';
 import 'package:riverpod/riverpod.dart';
 import 'package:shelf/shelf.dart';
 import 'package:shelf_router/shelf_router.dart';
@@ -17,9 +17,15 @@ Router getRouter(ProviderContainer container) {
 
   // Services
   final userService = container.read(userServiceProvider);
+  final projectService = container.read(projectServiceProvider);
+  final projectTaskService = container.read(projectTaskServiceProvider);
+  final timeEntryService = container.read(timeEntryServiceProvider);
 
   // UserService-Router
   router.mount('/users/', userService.router.call);
+  router.mount('/projects/', projectService.router.call);
+  router.mount('/project-tasks/', projectTaskService.router.call);
+  router.mount('/time-entries/', timeEntryService.router.call);
 
   return router;
 }

backend-dart/prisma/schema.prisma

@@ -26,7 +26,7 @@ model ProjectDbo {
   name        String
   description String?
   clientId    String?
-  tasks       TaskDbo[] // Beziehung zu Aufgaben
+  tasks       ProjectTaskDbo[] // Beziehung zu Aufgaben
   timeEntries TimeEntryDbo[] // Beziehung zu Zeiteinträgen
   user        UserDbo        @relation(fields: [userId], references: [id])
   userId      String
@@ -49,7 +49,7 @@ model TimeEntryDbo {
 }
 
 // Task Model (optional)
-model TaskDbo {
+model ProjectTaskDbo {
   id          String   @id @default(uuid())
   name        String
   description String?