fill

lib/features/products/presentation/providers/products_provider.dart

@@ -0,0 +1,108 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../../domain/entities/product_entity.dart';
+import '../../domain/usecases/get_products_usecase.dart';
+
+/// Products state class
+/// Holds the current state of the products feature
+class ProductsState {
+  final List<ProductEntity> products;
+  final String operationType;
+  final int? warehouseId;
+  final String? warehouseName;
+  final bool isLoading;
+  final String? error;
+
+  const ProductsState({
+    this.products = const [],
+    this.operationType = 'import',
+    this.warehouseId,
+    this.warehouseName,
+    this.isLoading = false,
+    this.error,
+  });
+
+  ProductsState copyWith({
+    List<ProductEntity>? products,
+    String? operationType,
+    int? warehouseId,
+    String? warehouseName,
+    bool? isLoading,
+    String? error,
+  }) {
+    return ProductsState(
+      products: products ?? this.products,
+      operationType: operationType ?? this.operationType,
+      warehouseId: warehouseId ?? this.warehouseId,
+      warehouseName: warehouseName ?? this.warehouseName,
+      isLoading: isLoading ?? this.isLoading,
+      error: error,
+    );
+  }
+}
+
+/// Products notifier
+/// Manages the products state and business logic
+class ProductsNotifier extends StateNotifier<ProductsState> {
+  final GetProductsUseCase getProductsUseCase;
+
+  ProductsNotifier(this.getProductsUseCase) : super(const ProductsState());
+
+  /// Load products for a specific warehouse and operation type
+  ///
+  /// [warehouseId] - The ID of the warehouse
+  /// [warehouseName] - The name of the warehouse (for display)
+  /// [type] - The operation type ('import' or 'export')
+  Future<void> loadProducts(
+    int warehouseId,
+    String warehouseName,
+    String type,
+  ) async {
+    // Set loading state
+    state = state.copyWith(
+      isLoading: true,
+      error: null,
+      warehouseId: warehouseId,
+      warehouseName: warehouseName,
+      operationType: type,
+    );
+
+    // Call the use case
+    final result = await getProductsUseCase(warehouseId, type);
+
+    // Handle the result
+    result.fold(
+      (failure) {
+        // Handle failure
+        state = state.copyWith(
+          isLoading: false,
+          error: failure.message,
+          products: [],
+        );
+      },
+      (products) {
+        // Handle success
+        state = state.copyWith(
+          isLoading: false,
+          error: null,
+          products: products,
+        );
+      },
+    );
+  }
+
+  /// Clear products list
+  void clearProducts() {
+    state = const ProductsState();
+  }
+
+  /// Refresh products
+  Future<void> refreshProducts() async {
+    if (state.warehouseId != null) {
+      await loadProducts(
+        state.warehouseId!,
+        state.warehouseName ?? '',
+        state.operationType,
+      );
+    }
+  }
+}