147 lines
3.7 KiB
Dart
147 lines
3.7 KiB
Dart
import 'dart:async';
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import 'package:collection/collection.dart';
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import 'package:flutter/foundation.dart';
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import 'package:sentry_flutter/sentry_flutter.dart';
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import '../models/app_error.dart';
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import '../models/bar_tab.dart';
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import '../models/payment_method.dart';
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import '../models/product.dart';
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import '../models/tab_item.dart';
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import '../services/bar_tab_service.dart';
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/// Tabs come from a database stream, so every change (local or remote) shows
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/// up without manual reloads. Actions report to Sentry and rethrow; the view
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/// decides how to tell the user.
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class BarScreenViewModel extends ChangeNotifier {
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final BarTabService barTabService;
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BarScreenViewModel({required this.barTabService});
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StreamSubscription<List<BarTab>>? _subscription;
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List<BarTab> _tabs = [];
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String? _selectedTabId;
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bool _hasLoaded = false;
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AppError? _loadError;
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List<BarTab> get tabs => _tabs;
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String? get selectedTabId => _selectedTabId;
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bool get isLoading => !_hasLoaded;
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AppError? get loadError => _loadError;
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BarTab? get selectedTab =>
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_tabs.firstWhereOrNull((tab) => tab.id == _selectedTabId);
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bool hasOpenTabNamed(String name, {String? exceptTabId}) {
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final normalized = name.trim().toLowerCase();
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return _tabs.any(
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(tab) =>
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tab.id != exceptTabId &&
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tab.customerName.trim().toLowerCase() == normalized,
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);
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}
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void ensureLoaded() {
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if (_subscription != null) return;
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_subscription = barTabService.watchOpenTabs().listen(
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_onTabs,
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onError: _onLoadError,
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);
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}
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void _onTabs(List<BarTab> tabs) {
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_tabs = tabs;
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_hasLoaded = true;
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_loadError = null;
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if (selectedTab == null) _selectedTabId = tabs.firstOrNull?.id;
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notifyListeners();
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}
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void _onLoadError(Object error, StackTrace stack) {
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debugPrint('BarScreenViewModel: load error: $error');
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unawaited(Sentry.captureException(error, stackTrace: stack));
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_hasLoaded = true;
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_loadError = AppError.loadBar;
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notifyListeners();
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}
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void selectTab(String tabId) {
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_selectedTabId = tabId;
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notifyListeners();
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}
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Future<void> createTab(String customerName) {
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return _guard('createTab', () async {
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final tab = await barTabService.createTab(customerName: customerName);
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selectTab(tab.id);
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});
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}
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Future<void> renameTab(String tabId, String customerName) {
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return _guard(
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'renameTab',
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() => barTabService.renameTab(tabId: tabId, customerName: customerName),
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);
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}
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Future<void> deleteTab(String tabId) {
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return _guard('deleteTab', () => barTabService.deleteTab(tabId));
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}
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Future<void> addProductToSelectedTab(Product product) async {
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final tab = selectedTab;
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if (tab == null) return;
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await _guard(
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'addProductToSelectedTab',
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() => barTabService.addProductToTab(tabId: tab.id, product: product),
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);
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}
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Future<void> changeItemQuantity(TabItem item, int delta) async {
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if (delta == 0) return;
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await _guard(
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'changeItemQuantity',
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() =>
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barTabService.adjustTabItemQuantity(tabItemId: item.id, delta: delta),
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);
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}
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Future<void> closeSelectedTab({
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PaymentMethod paymentMethod = PaymentMethod.cash,
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}) async {
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final tab = selectedTab;
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if (tab == null) return;
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await _guard(
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'closeSelectedTab',
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() => barTabService.closeTab(tab.id, paymentMethod: paymentMethod),
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);
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}
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Future<T> _guard<T>(String action, Future<T> Function() body) async {
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try {
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return await body();
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} catch (e, stack) {
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debugPrint('BarScreenViewModel: $action error: $e');
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unawaited(Sentry.captureException(e, stackTrace: stack));
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rethrow;
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}
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}
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@override
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void dispose() {
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_subscription?.cancel();
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super.dispose();
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}
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}
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