runable

lib/features/categories/data/datasources/category_local_datasource.dart

@@ -0,0 +1,37 @@
+import 'package:hive_ce/hive.dart';
+import '../models/category_model.dart';
+
+/// Category local data source using Hive
+abstract class CategoryLocalDataSource {
+  Future<List<CategoryModel>> getAllCategories();
+  Future<CategoryModel?> getCategoryById(String id);
+  Future<void> cacheCategories(List<CategoryModel> categories);
+  Future<void> clearCategories();
+}
+
+class CategoryLocalDataSourceImpl implements CategoryLocalDataSource {
+  final Box<CategoryModel> box;
+
+  CategoryLocalDataSourceImpl(this.box);
+
+  @override
+  Future<List<CategoryModel>> getAllCategories() async {
+    return box.values.toList();
+  }
+
+  @override
+  Future<CategoryModel?> getCategoryById(String id) async {
+    return box.get(id);
+  }
+
+  @override
+  Future<void> cacheCategories(List<CategoryModel> categories) async {
+    final categoryMap = {for (var c in categories) c.id: c};
+    await box.putAll(categoryMap);
+  }
+
+  @override
+  Future<void> clearCategories() async {
+    await box.clear();
+  }
+}

lib/features/categories/data/models/category_model.dart

@@ -0,0 +1,112 @@
+import 'package:hive_ce/hive.dart';
+import '../../domain/entities/category.dart';
+import '../../../../core/constants/storage_constants.dart';
+
+part 'category_model.g.dart';
+
+@HiveType(typeId: StorageConstants.categoryTypeId)
+class CategoryModel extends HiveObject {
+  @HiveField(0)
+  final String id;
+
+  @HiveField(1)
+  final String name;
+
+  @HiveField(2)
+  final String? description;
+
+  @HiveField(3)
+  final String? iconPath;
+
+  @HiveField(4)
+  final String? color;
+
+  @HiveField(5)
+  final int productCount;
+
+  @HiveField(6)
+  final DateTime createdAt;
+
+  CategoryModel({
+    required this.id,
+    required this.name,
+    this.description,
+    this.iconPath,
+    this.color,
+    required this.productCount,
+    required this.createdAt,
+  });
+
+  /// Convert to domain entity
+  Category toEntity() {
+    return Category(
+      id: id,
+      name: name,
+      description: description,
+      iconPath: iconPath,
+      color: color,
+      productCount: productCount,
+      createdAt: createdAt,
+    );
+  }
+
+  /// Create from domain entity
+  factory CategoryModel.fromEntity(Category category) {
+    return CategoryModel(
+      id: category.id,
+      name: category.name,
+      description: category.description,
+      iconPath: category.iconPath,
+      color: category.color,
+      productCount: category.productCount,
+      createdAt: category.createdAt,
+    );
+  }
+
+  /// Create from JSON
+  factory CategoryModel.fromJson(Map<String, dynamic> json) {
+    return CategoryModel(
+      id: json['id'] as String,
+      name: json['name'] as String,
+      description: json['description'] as String?,
+      iconPath: json['iconPath'] as String?,
+      color: json['color'] as String?,
+      productCount: json['productCount'] as int,
+      createdAt: DateTime.parse(json['createdAt'] as String),
+    );
+  }
+
+  /// Convert to JSON
+  Map<String, dynamic> toJson() {
+    return {
+      'id': id,
+      'name': name,
+      'description': description,
+      'iconPath': iconPath,
+      'color': color,
+      'productCount': productCount,
+      'createdAt': createdAt.toIso8601String(),
+    };
+  }
+
+  /// Create a copy with updated fields
+  CategoryModel copyWith({
+    String? id,
+    String? name,
+    String? description,
+    String? iconPath,
+    String? color,
+    int? productCount,
+    DateTime? createdAt,
+  }) {
+    return CategoryModel(
+      id: id ?? this.id,
+      name: name ?? this.name,
+      description: description ?? this.description,
+      iconPath: iconPath ?? this.iconPath,
+      color: color ?? this.color,
+      productCount: productCount ?? this.productCount,
+      createdAt: createdAt ?? this.createdAt,
+    );
+  }
+}

lib/features/categories/data/models/category_model.g.dart

@@ -0,0 +1,59 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'category_model.dart';
+
+// **************************************************************************
+// TypeAdapterGenerator
+// **************************************************************************
+
+class CategoryModelAdapter extends TypeAdapter<CategoryModel> {
+  @override
+  final typeId = 1;
+
+  @override
+  CategoryModel read(BinaryReader reader) {
+    final numOfFields = reader.readByte();
+    final fields = <int, dynamic>{
+      for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
+    };
+    return CategoryModel(
+      id: fields[0] as String,
+      name: fields[1] as String,
+      description: fields[2] as String?,
+      iconPath: fields[3] as String?,
+      color: fields[4] as String?,
+      productCount: (fields[5] as num).toInt(),
+      createdAt: fields[6] as DateTime,
+    );
+  }
+
+  @override
+  void write(BinaryWriter writer, CategoryModel obj) {
+    writer
+      ..writeByte(7)
+      ..writeByte(0)
+      ..write(obj.id)
+      ..writeByte(1)
+      ..write(obj.name)
+      ..writeByte(2)
+      ..write(obj.description)
+      ..writeByte(3)
+      ..write(obj.iconPath)
+      ..writeByte(4)
+      ..write(obj.color)
+      ..writeByte(5)
+      ..write(obj.productCount)
+      ..writeByte(6)
+      ..write(obj.createdAt);
+  }
+
+  @override
+  int get hashCode => typeId.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is CategoryModelAdapter &&
+          runtimeType == other.runtimeType &&
+          typeId == other.typeId;
+}

lib/features/categories/data/repositories/category_repository_impl.dart

@@ -0,0 +1,49 @@
+import 'package:dartz/dartz.dart';
+import '../../domain/entities/category.dart';
+import '../../domain/repositories/category_repository.dart';
+import '../datasources/category_local_datasource.dart';
+import '../../../../core/errors/failures.dart';
+import '../../../../core/errors/exceptions.dart';
+
+class CategoryRepositoryImpl implements CategoryRepository {
+  final CategoryLocalDataSource localDataSource;
+
+  CategoryRepositoryImpl({
+    required this.localDataSource,
+  });
+
+  @override
+  Future<Either<Failure, List<Category>>> getAllCategories() async {
+    try {
+      final categories = await localDataSource.getAllCategories();
+      return Right(categories.map((model) => model.toEntity()).toList());
+    } on CacheException catch (e) {
+      return Left(CacheFailure(e.message));
+    }
+  }
+
+  @override
+  Future<Either<Failure, Category>> getCategoryById(String id) async {
+    try {
+      final category = await localDataSource.getCategoryById(id);
+      if (category == null) {
+        return Left(NotFoundFailure('Category not found'));
+      }
+      return Right(category.toEntity());
+    } on CacheException catch (e) {
+      return Left(CacheFailure(e.message));
+    }
+  }
+
+  @override
+  Future<Either<Failure, List<Category>>> syncCategories() async {
+    try {
+      // For now, return cached categories
+      // In the future, implement remote sync
+      final categories = await localDataSource.getAllCategories();
+      return Right(categories.map((model) => model.toEntity()).toList());
+    } on CacheException catch (e) {
+      return Left(CacheFailure(e.message));
+    }
+  }
+}