runable

lib/features/products/domain/entities/product.dart

@@ -0,0 +1,42 @@
+import 'package:equatable/equatable.dart';
+
+/// Product domain entity
+class Product extends Equatable {
+  final String id;
+  final String name;
+  final String description;
+  final double price;
+  final String? imageUrl;
+  final String categoryId;
+  final int stockQuantity;
+  final bool isAvailable;
+  final DateTime createdAt;
+  final DateTime updatedAt;
+
+  const Product({
+    required this.id,
+    required this.name,
+    required this.description,
+    required this.price,
+    this.imageUrl,
+    required this.categoryId,
+    required this.stockQuantity,
+    required this.isAvailable,
+    required this.createdAt,
+    required this.updatedAt,
+  });
+
+  @override
+  List<Object?> get props => [
+        id,
+        name,
+        description,
+        price,
+        imageUrl,
+        categoryId,
+        stockQuantity,
+        isAvailable,
+        createdAt,
+        updatedAt,
+      ];
+}

lib/features/products/domain/repositories/product_repository.dart

@@ -0,0 +1,21 @@
+import 'package:dartz/dartz.dart';
+import '../../../../core/errors/failures.dart';
+import '../entities/product.dart';
+
+/// Product repository interface
+abstract class ProductRepository {
+  /// Get all products from cache
+  Future<Either<Failure, List<Product>>> getAllProducts();
+  
+  /// Get products by category
+  Future<Either<Failure, List<Product>>> getProductsByCategory(String categoryId);
+  
+  /// Search products
+  Future<Either<Failure, List<Product>>> searchProducts(String query);
+  
+  /// Get product by ID
+  Future<Either<Failure, Product>> getProductById(String id);
+  
+  /// Sync products from remote
+  Future<Either<Failure, List<Product>>> syncProducts();
+}

lib/features/products/domain/usecases/get_all_products.dart

@@ -0,0 +1,15 @@
+import 'package:dartz/dartz.dart';
+import '../../../../core/errors/failures.dart';
+import '../entities/product.dart';
+import '../repositories/product_repository.dart';
+
+/// Use case to get all products
+class GetAllProducts {
+  final ProductRepository repository;
+
+  GetAllProducts(this.repository);
+
+  Future<Either<Failure, List<Product>>> call() async {
+    return await repository.getAllProducts();
+  }
+}

lib/features/products/domain/usecases/search_products.dart

@@ -0,0 +1,15 @@
+import 'package:dartz/dartz.dart';
+import '../../../../core/errors/failures.dart';
+import '../entities/product.dart';
+import '../repositories/product_repository.dart';
+
+/// Use case to search products
+class SearchProducts {
+  final ProductRepository repository;
+
+  SearchProducts(this.repository);
+
+  Future<Either<Failure, List<Product>>> call(String query) async {
+    return await repository.searchProducts(query);
+  }
+}