init

lib/services/product_service.dart

@@ -0,0 +1,121 @@
+import 'package:drift/drift.dart';
+import 'package:uuid/uuid.dart';
+
+import '../database/app_database.dart';
+import '../models/product.dart';
+
+abstract class ProductService {
+  Future<List<Product>> getProducts();
+
+  Future<Product?> getProductById(String id);
+
+  Future<void> createProduct({
+    required String name,
+    required String category,
+    required int stockQuantity,
+    required int lowStockThreshold,
+    required int priceInCents,
+    required String? imagePath,
+  });
+
+  Future<void> updateProduct(Product product);
+
+  Future<void> deleteProduct(String id);
+}
+
+class DriftProductService implements ProductService {
+  final AppDatabase database;
+  final _uuid = const Uuid();
+
+  DriftProductService({
+    required this.database,
+  });
+
+  Product _mapRowToProduct(ProductRow row) {
+    return Product(
+      id: row.id,
+      name: row.name,
+      category: row.category,
+      stockQuantity: row.stockQuantity,
+      lowStockThreshold: row.lowStockThreshold,
+      priceInCents: row.priceInCents,
+      imagePath: row.imagePath,
+      active: row.active,
+    );
+  }
+
+  @override
+  Future<List<Product>> getProducts() async {
+    final query = database.select(database.products)
+      ..where((product) => product.active.equals(true))
+      ..orderBy([
+            (product) => OrderingTerm.asc(product.name),
+      ]);
+
+    final rows = await query.get();
+
+    return rows.map(_mapRowToProduct).toList();
+  }
+
+  @override
+  Future<Product?> getProductById(String id) async {
+    final query = database.select(database.products)
+      ..where((product) => product.id.equals(id));
+
+    final row = await query.getSingleOrNull();
+
+    if (row == null) {
+      return null;
+    }
+
+    return _mapRowToProduct(row);
+  }
+
+  @override
+  Future<void> createProduct({
+    required String name,
+    required String category,
+    required int stockQuantity,
+    required int lowStockThreshold,
+    required int priceInCents,
+    required String? imagePath,
+  }) async {
+    await database.into(database.products).insert(
+      ProductsCompanion.insert(
+        id: _uuid.v4(),
+        name: name,
+        category: category,
+        stockQuantity: stockQuantity,
+        lowStockThreshold: lowStockThreshold,
+        priceInCents: priceInCents,
+        imagePath: Value(imagePath),
+      ),
+    );
+  }
+
+  @override
+  Future<void> updateProduct(Product product) async {
+    final query = database.update(database.products)
+      ..where((row) => row.id.equals(product.id));
+
+    await query.write(
+      ProductsCompanion(
+        name: Value(product.name),
+        category: Value(product.category),
+        stockQuantity: Value(product.stockQuantity),
+        lowStockThreshold: Value(product.lowStockThreshold),
+        priceInCents: Value(product.priceInCents),
+        imagePath: Value(product.imagePath),
+        active: Value(product.active),
+      ),
+    );
+  }
+
+  @override
+  Future<void> deleteProduct(String id) async {
+    final query = database.delete(database.products)
+      ..where((product) => product.id.equals(id));
+
+    await query.go();
+  }
+}