feat: add equality operators, make history screen paginated, random performance updates

lib/viewmodels/bar_screen_view_model.dart

@@ -88,9 +88,11 @@ class BarScreenViewModel extends ChangeNotifier {
       throw Exception('Product is out of stock.');
     }
 
-    await barTabService.addProductToTab(tabId: tab.id, product: product);
-
-    await inventory.decreaseStock(product.id, 1);
+    await barTabService.addProductToTab(
+      tabId: tab.id,
+      product: product,
+      stockAdjustment: () => inventory.decreaseStock(product.id, 1),
+    );
 
     await _reloadTabs();
   }
@@ -101,14 +103,15 @@ class BarScreenViewModel extends ChangeNotifier {
     await barTabService.updateTabItemQuantity(
       tabItemId: item.id,
       quantity: quantity,
+      stockAdjustment: () async {
+        if (difference > 0) {
+          await inventory.decreaseStock(item.productId, difference);
+        } else if (difference < 0) {
+          await inventory.increaseStock(item.productId, -difference);
+        }
+      },
     );
 
-    if (difference > 0) {
-      await inventory.decreaseStock(item.productId, difference);
-    } else if (difference < 0) {
-      await inventory.increaseStock(item.productId, -difference);
-    }
-
     await _reloadTabs();
   }
 

lib/viewmodels/dev_menu_view_model.dart

@@ -254,4 +254,73 @@ class DevMenuViewModel extends ChangeNotifier {
       notifyListeners();
     }
   }
+
+  Future<void> generateMockOrders({int count = 100}) async {
+    _isLoading = true;
+    notifyListeners();
+
+    try {
+      final products = await productService.getProducts();
+      if (products.isEmpty) {
+        _lastAction = 'No products available — seed demo data first';
+        return;
+      }
+
+      final uuid = const Uuid();
+      final customerNames = [
+        'Alice', 'Bob', 'Charlie', 'Diana', 'Eve', 'Frank',
+        'Grace', 'Hank', 'Ivy', 'Jack', 'Kate', 'Leo',
+        'Mia', 'Noah', 'Olivia', 'Pete', 'Quinn', 'Rose',
+        'Sam', 'Tina', 'Umar', 'Vera', 'Wes', 'Xena',
+        'Yves', 'Zara',
+      ];
+
+      await database.transaction(() async {
+        for (var i = 0; i < count; i++) {
+          final customer = customerNames[i % customerNames.length];
+          final closedTabId = uuid.v4();
+          final itemCount = 1 + (i % 5);
+
+          final closedAt = DateTime.now().subtract(
+            Duration(
+              days: i % 90,
+              hours: i % 24,
+              minutes: i % 60,
+            ),
+          );
+
+          await database.into(database.closedTabs).insert(
+            ClosedTabsCompanion.insert(
+              id: closedTabId,
+              originalTabId: uuid.v4(),
+              customerName: customer,
+              closedAt: closedAt,
+            ),
+          );
+
+          for (var j = 0; j < itemCount; j++) {
+            final product = products[(i + j) % products.length];
+            final quantity = 1 + ((i * 7 + j * 13) % 6);
+
+            await database.into(database.closedTabItems).insert(
+              ClosedTabItemsCompanion.insert(
+                id: uuid.v4(),
+                closedTabId: closedTabId,
+                productId: product.id,
+                productName: product.name,
+                quantity: quantity,
+                unitPriceInCents: product.priceInCents,
+              ),
+            );
+          }
+        }
+      });
+
+      _lastAction = 'Generated $count mock orders across '
+          '${customerNames.length} customers';
+    } finally {
+      _isLoading = false;
+      notifyListeners();
+    }
+  }
 }

lib/viewmodels/history_view_model.dart

@@ -8,9 +8,16 @@ class HistoryViewModel extends ChangeNotifier {
 
   HistoryViewModel({required this.barTabService});
 
+  static const int _pageSize = 20;
+
   List<ClosedTab> _closedTabs = [];
+  List<String> _customerNames = [];
+  String? _selectedCustomer;
+  int _offset = 0;
+  int _totalCount = 0;
   bool _isLoading = false;
   bool _hasLoaded = false;
+  bool _isLoadingMore = false;
   String? _errorMessage;
   String _searchQuery = '';
 
@@ -26,10 +33,18 @@ class HistoryViewModel extends ChangeNotifier {
         .toList();
   }
 
+  List<String> get customerNames => _customerNames;
+
+  String? get selectedCustomer => _selectedCustomer;
+
   bool get isLoading => _isLoading;
 
   bool get hasLoaded => _hasLoaded;
 
+  bool get isLoadingMore => _isLoadingMore;
+
+  bool get hasMore => _closedTabs.length < _totalCount;
+
   String? get errorMessage => _errorMessage;
 
   Future<void> ensureLoaded() async {
@@ -46,7 +61,18 @@ class HistoryViewModel extends ChangeNotifier {
     notifyListeners();
 
     try {
-      _closedTabs = await barTabService.getClosedTabs();
+      final results = await Future.wait([
+        _fetchPage(offset: 0),
+        barTabService.getClosedTabCount(
+          customerName: _selectedCustomer,
+        ),
+        barTabService.getDistinctCustomerNames(),
+      ]);
+
+      _closedTabs = results[0] as List<ClosedTab>;
+      _totalCount = results[1] as int;
+      _customerNames = results[2] as List<String>;
+      _offset = _closedTabs.length;
     } catch (_) {
       _errorMessage = 'Could not load tab history.';
     } finally {
@@ -56,8 +82,43 @@ class HistoryViewModel extends ChangeNotifier {
     }
   }
 
+  Future<void> loadMore() async {
+    if (_isLoadingMore || !hasMore) return;
+
+    _isLoadingMore = true;
+    notifyListeners();
+
+    try {
+      final more = await _fetchPage(offset: _offset);
+      _closedTabs = [..._closedTabs, ...more];
+      _offset = _closedTabs.length;
+    } catch (_) {
+      _errorMessage = 'Could not load more tabs.';
+    } finally {
+      _isLoadingMore = false;
+      notifyListeners();
+    }
+  }
+
+  Future<List<ClosedTab>> _fetchPage({required int offset}) {
+    return barTabService.getClosedTabsPaginated(
+      limit: _pageSize,
+      offset: offset,
+      customerName: _selectedCustomer,
+    );
+  }
+
   void search(String query) {
     _searchQuery = query;
     notifyListeners();
   }
-}
+
+  Future<void> filterByCustomer(String? customerName) async {
+    _selectedCustomer = customerName;
+    _searchQuery = '';
+    _offset = 0;
+    _closedTabs = [];
+
+    await load();
+  }
+}

lib/viewmodels/settings_view_model.dart

@@ -4,6 +4,7 @@ import 'package:ota_update/ota_update.dart';
 
 import '../models/settings.dart';
 import '../services/settings_service.dart';
+import '../utils/app_config.dart';
 
 class SettingsViewModel extends ChangeNotifier {
   final SettingsService settingsService;
@@ -15,9 +16,7 @@ class SettingsViewModel extends ChangeNotifier {
   bool _hasLoaded = false;
   String? _errorMessage;
 
-  final AppUpdateUtil _updater = AppUpdateUtil(
-    serverUrl: "https://updater.brammie15.dev",
-  );
+  final AppUpdateUtil _updater = AppUpdateUtil(serverUrl: kUpdateServerUrl);
 
   bool _checkingForUpdates = false;
 
@@ -74,7 +73,7 @@ class SettingsViewModel extends ChangeNotifier {
   }) async {
     final url = update.download.startsWith("http")
         ? update.download
-        : "https://updater.brammie15.dev${update.download}";
+        : "$kUpdateServerUrl${update.download}";
 
     debugPrint("Download Url: ${url}");