sync product to local

lib/presentation/data_sync/bloc/data_sync_bloc.dart

@@ -0,0 +1,185 @@
+import 'dart:async';
+import 'dart:developer';
+import 'package:bloc/bloc.dart';
+import 'package:enaklo_pos/data/datasources/product/product_local_datasource.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
+import '../../../data/datasources/product_remote_datasource.dart';
+
+part 'data_sync_event.dart';
+part 'data_sync_state.dart';
+part 'data_sync_bloc.freezed.dart';
+
+enum SyncStep { products, categories, variants, completed }
+
+class SyncStats {
+  final int totalProducts;
+  final int totalCategories;
+  final int totalVariants;
+  final double databaseSizeMB;
+
+  SyncStats({
+    required this.totalProducts,
+    required this.totalCategories,
+    required this.totalVariants,
+    required this.databaseSizeMB,
+  });
+}
+
+class DataSyncBloc extends Bloc<DataSyncEvent, DataSyncState> {
+  final ProductRemoteDatasource _remoteDatasource = ProductRemoteDatasource();
+  final ProductLocalDatasource _localDatasource =
+      ProductLocalDatasource.instance;
+
+  Timer? _progressTimer;
+  bool _isCancelled = false;
+
+  DataSyncBloc() : super(const DataSyncState.initial()) {
+    on<_StartSync>(_onStartSync);
+    on<_CancelSync>(_onCancelSync);
+  }
+
+  @override
+  Future<void> close() {
+    _progressTimer?.cancel();
+    return super.close();
+  }
+
+  Future<void> _onStartSync(
+    _StartSync event,
+    Emitter<DataSyncState> emit,
+  ) async {
+    log('🔄 Starting data sync...');
+    _isCancelled = false;
+
+    try {
+      // Step 1: Clear existing local data
+      emit(const DataSyncState.syncing(
+          SyncStep.products, 0.1, 'Membersihkan data lama...'));
+      await _localDatasource.clearAllProducts();
+
+      if (_isCancelled) return;
+
+      // Step 2: Sync products
+      await _syncProducts(emit);
+
+      if (_isCancelled) return;
+
+      // Step 3: Generate final stats
+      emit(const DataSyncState.syncing(
+          SyncStep.completed, 0.9, 'Menyelesaikan sinkronisasi...'));
+
+      final stats = await _generateSyncStats();
+
+      emit(DataSyncState.completed(stats));
+      log('✅ Sync completed successfully');
+    } catch (e) {
+      log('❌ Sync failed: $e');
+      emit(DataSyncState.error('Gagal sinkronisasi: $e'));
+    }
+  }
+
+  Future<void> _syncProducts(Emitter<DataSyncState> emit) async {
+    log('📦 Syncing products...');
+
+    int page = 1;
+    int totalSynced = 0;
+    int? totalCount;
+    int? totalPages;
+    bool shouldContinue = true;
+
+    while (!_isCancelled && shouldContinue) {
+      // Calculate accurate progress based on total count
+      double progress = 0.2;
+      if (totalCount != null && (totalCount ?? 0) > 0) {
+        progress = 0.2 + (totalSynced / (totalCount ?? 0)) * 0.6;
+      }
+
+      emit(DataSyncState.syncing(
+        SyncStep.products,
+        progress,
+        totalCount != null
+            ? 'Mengunduh produk... ($totalSynced dari $totalCount)'
+            : 'Mengunduh produk... ($totalSynced produk)',
+      ));
+
+      final result = await _remoteDatasource.getProducts(
+        page: page,
+        limit: 50, // Bigger batch for sync
+      );
+
+      await result.fold(
+        (failure) async {
+          throw Exception(failure);
+        },
+        (response) async {
+          final products = response.data?.products ?? [];
+          final responseData = response.data;
+
+          // Get pagination info from first response
+          if (page == 1 && responseData != null) {
+            totalCount = responseData.totalCount;
+            totalPages = responseData.totalPages;
+            log('📊 Total products to sync: $totalCount (${totalPages} pages)');
+          }
+
+          if (products.isEmpty) {
+            shouldContinue = false;
+            return;
+          }
+
+          // Save to local database in batches
+          await _localDatasource.saveProductsBatch(products);
+
+          totalSynced += products.length;
+          page++;
+
+          log('📦 Synced page ${page - 1}: ${products.length} products (Total: $totalSynced)');
+
+          // Check if we reached the end using pagination info
+          if (totalPages != null && page > (totalPages ?? 0)) {
+            shouldContinue = false;
+            return;
+          }
+
+          // Fallback check if pagination info not available
+          if (products.length < 50) {
+            shouldContinue = false;
+            return;
+          }
+
+          // Small delay to prevent overwhelming the server
+          await Future.delayed(Duration(milliseconds: 100));
+        },
+      );
+    }
+
+    emit(DataSyncState.syncing(
+      SyncStep.completed,
+      0.8,
+      'Produk berhasil diunduh ($totalSynced dari ${totalCount ?? totalSynced})',
+    ));
+
+    log('✅ Products sync completed: $totalSynced products synced');
+  }
+
+  Future<SyncStats> _generateSyncStats() async {
+    final dbStats = await _localDatasource.getDatabaseStats();
+
+    return SyncStats(
+      totalProducts: dbStats['total_products'] ?? 0,
+      totalCategories: dbStats['total_categories'] ?? 0,
+      totalVariants: dbStats['total_variants'] ?? 0,
+      databaseSizeMB: dbStats['database_size_mb'] ?? 0.0,
+    );
+  }
+
+  Future<void> _onCancelSync(
+    _CancelSync event,
+    Emitter<DataSyncState> emit,
+  ) async {
+    log('⏹️ Cancelling sync...');
+    _isCancelled = true;
+    _progressTimer?.cancel();
+    emit(const DataSyncState.initial());
+  }
+}

lib/presentation/data_sync/bloc/data_sync_bloc.freezed.dart

@@ -0,0 +1,962 @@
+// 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 'data_sync_bloc.dart';
+
+// **************************************************************************
+// FreezedGenerator
+// **************************************************************************
+
+T _$identity<T>(T value) => value;
+
+final _privateConstructorUsedError = UnsupportedError(
+    'It seems like you constructed your class using `MyClass._()`. This constructor is only meant to be used by freezed and you are not supposed to need it nor use it.\nPlease check the documentation here for more information: https://github.com/rrousselGit/freezed#adding-getters-and-methods-to-our-models');
+
+/// @nodoc
+mixin _$DataSyncEvent {
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() startSync,
+    required TResult Function() cancelSync,
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? startSync,
+    TResult? Function()? cancelSync,
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? startSync,
+    TResult Function()? cancelSync,
+    required TResult orElse(),
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(_StartSync value) startSync,
+    required TResult Function(_CancelSync value) cancelSync,
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(_StartSync value)? startSync,
+    TResult? Function(_CancelSync value)? cancelSync,
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(_StartSync value)? startSync,
+    TResult Function(_CancelSync value)? cancelSync,
+    required TResult orElse(),
+  }) =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $DataSyncEventCopyWith<$Res> {
+  factory $DataSyncEventCopyWith(
+          DataSyncEvent value, $Res Function(DataSyncEvent) then) =
+      _$DataSyncEventCopyWithImpl<$Res, DataSyncEvent>;
+}
+
+/// @nodoc
+class _$DataSyncEventCopyWithImpl<$Res, $Val extends DataSyncEvent>
+    implements $DataSyncEventCopyWith<$Res> {
+  _$DataSyncEventCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of DataSyncEvent
+  /// with the given fields replaced by the non-null parameter values.
+}
+
+/// @nodoc
+abstract class _$$StartSyncImplCopyWith<$Res> {
+  factory _$$StartSyncImplCopyWith(
+          _$StartSyncImpl value, $Res Function(_$StartSyncImpl) then) =
+      __$$StartSyncImplCopyWithImpl<$Res>;
+}
+
+/// @nodoc
+class __$$StartSyncImplCopyWithImpl<$Res>
+    extends _$DataSyncEventCopyWithImpl<$Res, _$StartSyncImpl>
+    implements _$$StartSyncImplCopyWith<$Res> {
+  __$$StartSyncImplCopyWithImpl(
+      _$StartSyncImpl _value, $Res Function(_$StartSyncImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of DataSyncEvent
+  /// with the given fields replaced by the non-null parameter values.
+}
+
+/// @nodoc
+
+class _$StartSyncImpl implements _StartSync {
+  const _$StartSyncImpl();
+
+  @override
+  String toString() {
+    return 'DataSyncEvent.startSync()';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType && other is _$StartSyncImpl);
+  }
+
+  @override
+  int get hashCode => runtimeType.hashCode;
+
+  @override
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() startSync,
+    required TResult Function() cancelSync,
+  }) {
+    return startSync();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? startSync,
+    TResult? Function()? cancelSync,
+  }) {
+    return startSync?.call();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? startSync,
+    TResult Function()? cancelSync,
+    required TResult orElse(),
+  }) {
+    if (startSync != null) {
+      return startSync();
+    }
+    return orElse();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(_StartSync value) startSync,
+    required TResult Function(_CancelSync value) cancelSync,
+  }) {
+    return startSync(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(_StartSync value)? startSync,
+    TResult? Function(_CancelSync value)? cancelSync,
+  }) {
+    return startSync?.call(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(_StartSync value)? startSync,
+    TResult Function(_CancelSync value)? cancelSync,
+    required TResult orElse(),
+  }) {
+    if (startSync != null) {
+      return startSync(this);
+    }
+    return orElse();
+  }
+}
+
+abstract class _StartSync implements DataSyncEvent {
+  const factory _StartSync() = _$StartSyncImpl;
+}
+
+/// @nodoc
+abstract class _$$CancelSyncImplCopyWith<$Res> {
+  factory _$$CancelSyncImplCopyWith(
+          _$CancelSyncImpl value, $Res Function(_$CancelSyncImpl) then) =
+      __$$CancelSyncImplCopyWithImpl<$Res>;
+}
+
+/// @nodoc
+class __$$CancelSyncImplCopyWithImpl<$Res>
+    extends _$DataSyncEventCopyWithImpl<$Res, _$CancelSyncImpl>
+    implements _$$CancelSyncImplCopyWith<$Res> {
+  __$$CancelSyncImplCopyWithImpl(
+      _$CancelSyncImpl _value, $Res Function(_$CancelSyncImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of DataSyncEvent
+  /// with the given fields replaced by the non-null parameter values.
+}
+
+/// @nodoc
+
+class _$CancelSyncImpl implements _CancelSync {
+  const _$CancelSyncImpl();
+
+  @override
+  String toString() {
+    return 'DataSyncEvent.cancelSync()';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType && other is _$CancelSyncImpl);
+  }
+
+  @override
+  int get hashCode => runtimeType.hashCode;
+
+  @override
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() startSync,
+    required TResult Function() cancelSync,
+  }) {
+    return cancelSync();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? startSync,
+    TResult? Function()? cancelSync,
+  }) {
+    return cancelSync?.call();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? startSync,
+    TResult Function()? cancelSync,
+    required TResult orElse(),
+  }) {
+    if (cancelSync != null) {
+      return cancelSync();
+    }
+    return orElse();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(_StartSync value) startSync,
+    required TResult Function(_CancelSync value) cancelSync,
+  }) {
+    return cancelSync(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(_StartSync value)? startSync,
+    TResult? Function(_CancelSync value)? cancelSync,
+  }) {
+    return cancelSync?.call(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(_StartSync value)? startSync,
+    TResult Function(_CancelSync value)? cancelSync,
+    required TResult orElse(),
+  }) {
+    if (cancelSync != null) {
+      return cancelSync(this);
+    }
+    return orElse();
+  }
+}
+
+abstract class _CancelSync implements DataSyncEvent {
+  const factory _CancelSync() = _$CancelSyncImpl;
+}
+
+/// @nodoc
+mixin _$DataSyncState {
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() initial,
+    required TResult Function(SyncStep step, double progress, String message)
+        syncing,
+    required TResult Function(SyncStats stats) completed,
+    required TResult Function(String message) error,
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? initial,
+    TResult? Function(SyncStep step, double progress, String message)? syncing,
+    TResult? Function(SyncStats stats)? completed,
+    TResult? Function(String message)? error,
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? initial,
+    TResult Function(SyncStep step, double progress, String message)? syncing,
+    TResult Function(SyncStats stats)? completed,
+    TResult Function(String message)? error,
+    required TResult orElse(),
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(_Initial value) initial,
+    required TResult Function(_Syncing value) syncing,
+    required TResult Function(_Completed value) completed,
+    required TResult Function(_Error value) error,
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(_Initial value)? initial,
+    TResult? Function(_Syncing value)? syncing,
+    TResult? Function(_Completed value)? completed,
+    TResult? Function(_Error value)? error,
+  }) =>
+      throw _privateConstructorUsedError;
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(_Initial value)? initial,
+    TResult Function(_Syncing value)? syncing,
+    TResult Function(_Completed value)? completed,
+    TResult Function(_Error value)? error,
+    required TResult orElse(),
+  }) =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class $DataSyncStateCopyWith<$Res> {
+  factory $DataSyncStateCopyWith(
+          DataSyncState value, $Res Function(DataSyncState) then) =
+      _$DataSyncStateCopyWithImpl<$Res, DataSyncState>;
+}
+
+/// @nodoc
+class _$DataSyncStateCopyWithImpl<$Res, $Val extends DataSyncState>
+    implements $DataSyncStateCopyWith<$Res> {
+  _$DataSyncStateCopyWithImpl(this._value, this._then);
+
+  // ignore: unused_field
+  final $Val _value;
+  // ignore: unused_field
+  final $Res Function($Val) _then;
+
+  /// Create a copy of DataSyncState
+  /// with the given fields replaced by the non-null parameter values.
+}
+
+/// @nodoc
+abstract class _$$InitialImplCopyWith<$Res> {
+  factory _$$InitialImplCopyWith(
+          _$InitialImpl value, $Res Function(_$InitialImpl) then) =
+      __$$InitialImplCopyWithImpl<$Res>;
+}
+
+/// @nodoc
+class __$$InitialImplCopyWithImpl<$Res>
+    extends _$DataSyncStateCopyWithImpl<$Res, _$InitialImpl>
+    implements _$$InitialImplCopyWith<$Res> {
+  __$$InitialImplCopyWithImpl(
+      _$InitialImpl _value, $Res Function(_$InitialImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of DataSyncState
+  /// with the given fields replaced by the non-null parameter values.
+}
+
+/// @nodoc
+
+class _$InitialImpl implements _Initial {
+  const _$InitialImpl();
+
+  @override
+  String toString() {
+    return 'DataSyncState.initial()';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType && other is _$InitialImpl);
+  }
+
+  @override
+  int get hashCode => runtimeType.hashCode;
+
+  @override
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() initial,
+    required TResult Function(SyncStep step, double progress, String message)
+        syncing,
+    required TResult Function(SyncStats stats) completed,
+    required TResult Function(String message) error,
+  }) {
+    return initial();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? initial,
+    TResult? Function(SyncStep step, double progress, String message)? syncing,
+    TResult? Function(SyncStats stats)? completed,
+    TResult? Function(String message)? error,
+  }) {
+    return initial?.call();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? initial,
+    TResult Function(SyncStep step, double progress, String message)? syncing,
+    TResult Function(SyncStats stats)? completed,
+    TResult Function(String message)? error,
+    required TResult orElse(),
+  }) {
+    if (initial != null) {
+      return initial();
+    }
+    return orElse();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(_Initial value) initial,
+    required TResult Function(_Syncing value) syncing,
+    required TResult Function(_Completed value) completed,
+    required TResult Function(_Error value) error,
+  }) {
+    return initial(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(_Initial value)? initial,
+    TResult? Function(_Syncing value)? syncing,
+    TResult? Function(_Completed value)? completed,
+    TResult? Function(_Error value)? error,
+  }) {
+    return initial?.call(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(_Initial value)? initial,
+    TResult Function(_Syncing value)? syncing,
+    TResult Function(_Completed value)? completed,
+    TResult Function(_Error value)? error,
+    required TResult orElse(),
+  }) {
+    if (initial != null) {
+      return initial(this);
+    }
+    return orElse();
+  }
+}
+
+abstract class _Initial implements DataSyncState {
+  const factory _Initial() = _$InitialImpl;
+}
+
+/// @nodoc
+abstract class _$$SyncingImplCopyWith<$Res> {
+  factory _$$SyncingImplCopyWith(
+          _$SyncingImpl value, $Res Function(_$SyncingImpl) then) =
+      __$$SyncingImplCopyWithImpl<$Res>;
+  @useResult
+  $Res call({SyncStep step, double progress, String message});
+}
+
+/// @nodoc
+class __$$SyncingImplCopyWithImpl<$Res>
+    extends _$DataSyncStateCopyWithImpl<$Res, _$SyncingImpl>
+    implements _$$SyncingImplCopyWith<$Res> {
+  __$$SyncingImplCopyWithImpl(
+      _$SyncingImpl _value, $Res Function(_$SyncingImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of DataSyncState
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? step = null,
+    Object? progress = null,
+    Object? message = null,
+  }) {
+    return _then(_$SyncingImpl(
+      null == step
+          ? _value.step
+          : step // ignore: cast_nullable_to_non_nullable
+              as SyncStep,
+      null == progress
+          ? _value.progress
+          : progress // ignore: cast_nullable_to_non_nullable
+              as double,
+      null == message
+          ? _value.message
+          : message // ignore: cast_nullable_to_non_nullable
+              as String,
+    ));
+  }
+}
+
+/// @nodoc
+
+class _$SyncingImpl implements _Syncing {
+  const _$SyncingImpl(this.step, this.progress, this.message);
+
+  @override
+  final SyncStep step;
+  @override
+  final double progress;
+  @override
+  final String message;
+
+  @override
+  String toString() {
+    return 'DataSyncState.syncing(step: $step, progress: $progress, message: $message)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$SyncingImpl &&
+            (identical(other.step, step) || other.step == step) &&
+            (identical(other.progress, progress) ||
+                other.progress == progress) &&
+            (identical(other.message, message) || other.message == message));
+  }
+
+  @override
+  int get hashCode => Object.hash(runtimeType, step, progress, message);
+
+  /// Create a copy of DataSyncState
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$SyncingImplCopyWith<_$SyncingImpl> get copyWith =>
+      __$$SyncingImplCopyWithImpl<_$SyncingImpl>(this, _$identity);
+
+  @override
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() initial,
+    required TResult Function(SyncStep step, double progress, String message)
+        syncing,
+    required TResult Function(SyncStats stats) completed,
+    required TResult Function(String message) error,
+  }) {
+    return syncing(step, progress, message);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? initial,
+    TResult? Function(SyncStep step, double progress, String message)? syncing,
+    TResult? Function(SyncStats stats)? completed,
+    TResult? Function(String message)? error,
+  }) {
+    return syncing?.call(step, progress, message);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? initial,
+    TResult Function(SyncStep step, double progress, String message)? syncing,
+    TResult Function(SyncStats stats)? completed,
+    TResult Function(String message)? error,
+    required TResult orElse(),
+  }) {
+    if (syncing != null) {
+      return syncing(step, progress, message);
+    }
+    return orElse();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(_Initial value) initial,
+    required TResult Function(_Syncing value) syncing,
+    required TResult Function(_Completed value) completed,
+    required TResult Function(_Error value) error,
+  }) {
+    return syncing(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(_Initial value)? initial,
+    TResult? Function(_Syncing value)? syncing,
+    TResult? Function(_Completed value)? completed,
+    TResult? Function(_Error value)? error,
+  }) {
+    return syncing?.call(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(_Initial value)? initial,
+    TResult Function(_Syncing value)? syncing,
+    TResult Function(_Completed value)? completed,
+    TResult Function(_Error value)? error,
+    required TResult orElse(),
+  }) {
+    if (syncing != null) {
+      return syncing(this);
+    }
+    return orElse();
+  }
+}
+
+abstract class _Syncing implements DataSyncState {
+  const factory _Syncing(
+          final SyncStep step, final double progress, final String message) =
+      _$SyncingImpl;
+
+  SyncStep get step;
+  double get progress;
+  String get message;
+
+  /// Create a copy of DataSyncState
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$SyncingImplCopyWith<_$SyncingImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class _$$CompletedImplCopyWith<$Res> {
+  factory _$$CompletedImplCopyWith(
+          _$CompletedImpl value, $Res Function(_$CompletedImpl) then) =
+      __$$CompletedImplCopyWithImpl<$Res>;
+  @useResult
+  $Res call({SyncStats stats});
+}
+
+/// @nodoc
+class __$$CompletedImplCopyWithImpl<$Res>
+    extends _$DataSyncStateCopyWithImpl<$Res, _$CompletedImpl>
+    implements _$$CompletedImplCopyWith<$Res> {
+  __$$CompletedImplCopyWithImpl(
+      _$CompletedImpl _value, $Res Function(_$CompletedImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of DataSyncState
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? stats = null,
+  }) {
+    return _then(_$CompletedImpl(
+      null == stats
+          ? _value.stats
+          : stats // ignore: cast_nullable_to_non_nullable
+              as SyncStats,
+    ));
+  }
+}
+
+/// @nodoc
+
+class _$CompletedImpl implements _Completed {
+  const _$CompletedImpl(this.stats);
+
+  @override
+  final SyncStats stats;
+
+  @override
+  String toString() {
+    return 'DataSyncState.completed(stats: $stats)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$CompletedImpl &&
+            (identical(other.stats, stats) || other.stats == stats));
+  }
+
+  @override
+  int get hashCode => Object.hash(runtimeType, stats);
+
+  /// Create a copy of DataSyncState
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$CompletedImplCopyWith<_$CompletedImpl> get copyWith =>
+      __$$CompletedImplCopyWithImpl<_$CompletedImpl>(this, _$identity);
+
+  @override
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() initial,
+    required TResult Function(SyncStep step, double progress, String message)
+        syncing,
+    required TResult Function(SyncStats stats) completed,
+    required TResult Function(String message) error,
+  }) {
+    return completed(stats);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? initial,
+    TResult? Function(SyncStep step, double progress, String message)? syncing,
+    TResult? Function(SyncStats stats)? completed,
+    TResult? Function(String message)? error,
+  }) {
+    return completed?.call(stats);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? initial,
+    TResult Function(SyncStep step, double progress, String message)? syncing,
+    TResult Function(SyncStats stats)? completed,
+    TResult Function(String message)? error,
+    required TResult orElse(),
+  }) {
+    if (completed != null) {
+      return completed(stats);
+    }
+    return orElse();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(_Initial value) initial,
+    required TResult Function(_Syncing value) syncing,
+    required TResult Function(_Completed value) completed,
+    required TResult Function(_Error value) error,
+  }) {
+    return completed(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(_Initial value)? initial,
+    TResult? Function(_Syncing value)? syncing,
+    TResult? Function(_Completed value)? completed,
+    TResult? Function(_Error value)? error,
+  }) {
+    return completed?.call(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(_Initial value)? initial,
+    TResult Function(_Syncing value)? syncing,
+    TResult Function(_Completed value)? completed,
+    TResult Function(_Error value)? error,
+    required TResult orElse(),
+  }) {
+    if (completed != null) {
+      return completed(this);
+    }
+    return orElse();
+  }
+}
+
+abstract class _Completed implements DataSyncState {
+  const factory _Completed(final SyncStats stats) = _$CompletedImpl;
+
+  SyncStats get stats;
+
+  /// Create a copy of DataSyncState
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$CompletedImplCopyWith<_$CompletedImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}
+
+/// @nodoc
+abstract class _$$ErrorImplCopyWith<$Res> {
+  factory _$$ErrorImplCopyWith(
+          _$ErrorImpl value, $Res Function(_$ErrorImpl) then) =
+      __$$ErrorImplCopyWithImpl<$Res>;
+  @useResult
+  $Res call({String message});
+}
+
+/// @nodoc
+class __$$ErrorImplCopyWithImpl<$Res>
+    extends _$DataSyncStateCopyWithImpl<$Res, _$ErrorImpl>
+    implements _$$ErrorImplCopyWith<$Res> {
+  __$$ErrorImplCopyWithImpl(
+      _$ErrorImpl _value, $Res Function(_$ErrorImpl) _then)
+      : super(_value, _then);
+
+  /// Create a copy of DataSyncState
+  /// with the given fields replaced by the non-null parameter values.
+  @pragma('vm:prefer-inline')
+  @override
+  $Res call({
+    Object? message = null,
+  }) {
+    return _then(_$ErrorImpl(
+      null == message
+          ? _value.message
+          : message // ignore: cast_nullable_to_non_nullable
+              as String,
+    ));
+  }
+}
+
+/// @nodoc
+
+class _$ErrorImpl implements _Error {
+  const _$ErrorImpl(this.message);
+
+  @override
+  final String message;
+
+  @override
+  String toString() {
+    return 'DataSyncState.error(message: $message)';
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return identical(this, other) ||
+        (other.runtimeType == runtimeType &&
+            other is _$ErrorImpl &&
+            (identical(other.message, message) || other.message == message));
+  }
+
+  @override
+  int get hashCode => Object.hash(runtimeType, message);
+
+  /// Create a copy of DataSyncState
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  @override
+  @pragma('vm:prefer-inline')
+  _$$ErrorImplCopyWith<_$ErrorImpl> get copyWith =>
+      __$$ErrorImplCopyWithImpl<_$ErrorImpl>(this, _$identity);
+
+  @override
+  @optionalTypeArgs
+  TResult when<TResult extends Object?>({
+    required TResult Function() initial,
+    required TResult Function(SyncStep step, double progress, String message)
+        syncing,
+    required TResult Function(SyncStats stats) completed,
+    required TResult Function(String message) error,
+  }) {
+    return error(message);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? whenOrNull<TResult extends Object?>({
+    TResult? Function()? initial,
+    TResult? Function(SyncStep step, double progress, String message)? syncing,
+    TResult? Function(SyncStats stats)? completed,
+    TResult? Function(String message)? error,
+  }) {
+    return error?.call(message);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeWhen<TResult extends Object?>({
+    TResult Function()? initial,
+    TResult Function(SyncStep step, double progress, String message)? syncing,
+    TResult Function(SyncStats stats)? completed,
+    TResult Function(String message)? error,
+    required TResult orElse(),
+  }) {
+    if (error != null) {
+      return error(message);
+    }
+    return orElse();
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult map<TResult extends Object?>({
+    required TResult Function(_Initial value) initial,
+    required TResult Function(_Syncing value) syncing,
+    required TResult Function(_Completed value) completed,
+    required TResult Function(_Error value) error,
+  }) {
+    return error(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult? mapOrNull<TResult extends Object?>({
+    TResult? Function(_Initial value)? initial,
+    TResult? Function(_Syncing value)? syncing,
+    TResult? Function(_Completed value)? completed,
+    TResult? Function(_Error value)? error,
+  }) {
+    return error?.call(this);
+  }
+
+  @override
+  @optionalTypeArgs
+  TResult maybeMap<TResult extends Object?>({
+    TResult Function(_Initial value)? initial,
+    TResult Function(_Syncing value)? syncing,
+    TResult Function(_Completed value)? completed,
+    TResult Function(_Error value)? error,
+    required TResult orElse(),
+  }) {
+    if (error != null) {
+      return error(this);
+    }
+    return orElse();
+  }
+}
+
+abstract class _Error implements DataSyncState {
+  const factory _Error(final String message) = _$ErrorImpl;
+
+  String get message;
+
+  /// Create a copy of DataSyncState
+  /// with the given fields replaced by the non-null parameter values.
+  @JsonKey(includeFromJson: false, includeToJson: false)
+  _$$ErrorImplCopyWith<_$ErrorImpl> get copyWith =>
+      throw _privateConstructorUsedError;
+}

lib/presentation/data_sync/bloc/data_sync_event.dart

@@ -0,0 +1,7 @@
+part of 'data_sync_bloc.dart';
+
+@freezed
+class DataSyncEvent with _$DataSyncEvent {
+  const factory DataSyncEvent.startSync() = _StartSync;
+  const factory DataSyncEvent.cancelSync() = _CancelSync;
+}

lib/presentation/data_sync/bloc/data_sync_state.dart

@@ -0,0 +1,13 @@
+part of 'data_sync_bloc.dart';
+
+@freezed
+class DataSyncState with _$DataSyncState {
+  const factory DataSyncState.initial() = _Initial;
+  const factory DataSyncState.syncing(
+    SyncStep step,
+    double progress,
+    String message,
+  ) = _Syncing;
+  const factory DataSyncState.completed(SyncStats stats) = _Completed;
+  const factory DataSyncState.error(String message) = _Error;
+}