init
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import 'package:drift/drift.dart';
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import 'package:uuid/uuid.dart';
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import '../database/app_database.dart';
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import '../models/bar_tab.dart';
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import '../models/product.dart';
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import '../models/tab_item.dart';
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abstract class BarTabService {
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Future<List<BarTab>> getOpenTabs();
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Future<BarTab?> getTabById(String id);
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Future<BarTab> createTab({
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required String customerName,
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});
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Future<void> addProductToTab({
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required String tabId,
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required Product product,
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});
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Future<void> updateTabItemQuantity({
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required String tabItemId,
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required int quantity,
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});
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Future<void> closeTab(String tabId);
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}
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class DriftBarTabService implements BarTabService {
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final AppDatabase database;
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final _uuid = const Uuid();
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DriftBarTabService({
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required this.database,
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});
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TabItem _mapItemRow(TabItemRow row) {
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return TabItem(
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id: row.id,
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tabId: row.tabId,
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productId: row.productId,
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productName: row.productName,
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quantity: row.quantity,
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unitPriceInCents: row.unitPriceInCents,
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);
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}
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BarTab _mapTabRow(
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BarTabRow row,
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List<TabItem> items,
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) {
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return BarTab(
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id: row.id,
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customerName: row.customerName,
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status: row.status,
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openedAt: row.openedAt,
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closedAt: row.closedAt,
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items: items,
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);
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}
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Future<List<TabItem>> _getItemsForTab(String tabId) async {
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final query = database.select(database.tabItems)
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..where((item) => item.tabId.equals(tabId))
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..orderBy([
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(item) => OrderingTerm.asc(item.createdAt),
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]);
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final rows = await query.get();
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return rows.map(_mapItemRow).toList();
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}
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@override
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Future<List<BarTab>> getOpenTabs() async {
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final query = database.select(database.barTabs)
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..where((tab) => tab.status.equals('open'))
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..orderBy([
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(tab) => OrderingTerm.desc(tab.openedAt),
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]);
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final tabRows = await query.get();
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final tabs = <BarTab>[];
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for (final tabRow in tabRows) {
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final items = await _getItemsForTab(tabRow.id);
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tabs.add(_mapTabRow(tabRow, items));
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}
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return tabs;
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}
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@override
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Future<BarTab?> getTabById(String id) async {
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final query = database.select(database.barTabs)
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..where((tab) => tab.id.equals(id));
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final tabRow = await query.getSingleOrNull();
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if (tabRow == null) {
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return null;
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}
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final items = await _getItemsForTab(tabRow.id);
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return _mapTabRow(tabRow, items);
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}
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@override
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Future<BarTab> createTab({
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required String customerName,
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}) async {
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final id = _uuid.v4();
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await database.into(database.barTabs).insert(
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BarTabsCompanion.insert(
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id: id,
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customerName: customerName,
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status: const Value('open'),
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openedAt: DateTime.now(),
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),
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);
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final tab = await getTabById(id);
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if (tab == null) {
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throw Exception('Could not create tab.');
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}
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return tab;
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}
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@override
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Future<void> addProductToTab({
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required String tabId,
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required Product product,
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}) async {
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await database.transaction(() async {
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final existingItemQuery = database.select(database.tabItems)
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..where(
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(item) =>
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item.tabId.equals(tabId) &
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item.productId.equals(product.id),
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);
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final existingItem = await existingItemQuery.getSingleOrNull();
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if (existingItem != null) {
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final updateQuery = database.update(database.tabItems)
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..where((item) => item.id.equals(existingItem.id));
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await updateQuery.write(
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TabItemsCompanion(
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quantity: Value(existingItem.quantity + 1),
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),
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);
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return;
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}
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await database.into(database.tabItems).insert(
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TabItemsCompanion.insert(
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id: _uuid.v4(),
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tabId: tabId,
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productId: product.id,
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productName: product.name,
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quantity: 1,
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unitPriceInCents: product.priceInCents,
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createdAt: DateTime.now(),
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),
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);
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});
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}
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@override
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Future<void> updateTabItemQuantity({
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required String tabItemId,
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required int quantity,
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}) async {
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if (quantity <= 0) {
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final deleteQuery = database.delete(database.tabItems)
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..where((item) => item.id.equals(tabItemId));
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await deleteQuery.go();
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return;
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}
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final updateQuery = database.update(database.tabItems)
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..where((item) => item.id.equals(tabItemId));
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await updateQuery.write(
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TabItemsCompanion(
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quantity: Value(quantity),
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),
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);
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}
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@override
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Future<void> closeTab(String tabId) async {
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final updateQuery = database.update(database.barTabs)
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..where((tab) => tab.id.equals(tabId));
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await updateQuery.write(
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BarTabsCompanion(
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status: const Value('closed'),
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closedAt: Value(DateTime.now()),
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),
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);
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}
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}
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@@ -0,0 +1,121 @@
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import 'package:drift/drift.dart';
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import 'package:uuid/uuid.dart';
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import '../database/app_database.dart';
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import '../models/product.dart';
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abstract class ProductService {
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Future<List<Product>> getProducts();
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Future<Product?> getProductById(String id);
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Future<void> createProduct({
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required String name,
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required String category,
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required int stockQuantity,
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required int lowStockThreshold,
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required int priceInCents,
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required String? imagePath,
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});
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Future<void> updateProduct(Product product);
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Future<void> deleteProduct(String id);
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}
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class DriftProductService implements ProductService {
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final AppDatabase database;
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final _uuid = const Uuid();
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DriftProductService({
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required this.database,
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});
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Product _mapRowToProduct(ProductRow row) {
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return Product(
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id: row.id,
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name: row.name,
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category: row.category,
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stockQuantity: row.stockQuantity,
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lowStockThreshold: row.lowStockThreshold,
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priceInCents: row.priceInCents,
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imagePath: row.imagePath,
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active: row.active,
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);
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}
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@override
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Future<List<Product>> getProducts() async {
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final query = database.select(database.products)
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..where((product) => product.active.equals(true))
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..orderBy([
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(product) => OrderingTerm.asc(product.name),
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]);
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final rows = await query.get();
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return rows.map(_mapRowToProduct).toList();
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}
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@override
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Future<Product?> getProductById(String id) async {
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final query = database.select(database.products)
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..where((product) => product.id.equals(id));
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final row = await query.getSingleOrNull();
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if (row == null) {
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return null;
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}
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return _mapRowToProduct(row);
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}
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@override
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Future<void> createProduct({
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required String name,
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required String category,
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required int stockQuantity,
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required int lowStockThreshold,
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required int priceInCents,
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required String? imagePath,
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}) async {
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await database.into(database.products).insert(
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ProductsCompanion.insert(
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id: _uuid.v4(),
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name: name,
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category: category,
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stockQuantity: stockQuantity,
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lowStockThreshold: lowStockThreshold,
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priceInCents: priceInCents,
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imagePath: Value(imagePath),
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),
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);
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}
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@override
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Future<void> updateProduct(Product product) async {
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final query = database.update(database.products)
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..where((row) => row.id.equals(product.id));
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await query.write(
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ProductsCompanion(
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name: Value(product.name),
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category: Value(product.category),
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stockQuantity: Value(product.stockQuantity),
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lowStockThreshold: Value(product.lowStockThreshold),
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priceInCents: Value(product.priceInCents),
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imagePath: Value(product.imagePath),
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active: Value(product.active),
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),
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);
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}
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@override
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Future<void> deleteProduct(String id) async {
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final query = database.delete(database.products)
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..where((product) => product.id.equals(id));
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await query.go();
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}
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}
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