Abschnitt 5

lib/models/expense.dart

@@ -6,10 +6,10 @@ import 'package:intl/intl.dart';
 final formatter = DateFormat('dd.MM.yyyy');
 const uuid = Uuid();
 
-enum Category { foot, travel, leisure, work }
+enum Category { food, travel, leisure, work }
 
 const categoryIcons = {
-  Category.foot: Icons.lunch_dining,
+  Category.food: Icons.lunch_dining,
   Category.travel: Icons.flight_takeoff,
   Category.leisure: Icons.movie,
   Category.work: Icons.work,
@@ -33,3 +33,28 @@ class Expense {
     return formatter.format(date);
   }
 }
+
+class ExpenseBucket {
+  const ExpenseBucket({
+    required this.category,
+    required this.expenses,
+  });
+
+  ExpenseBucket.forCategory(List<Expense> allExpenses, this.category)
+      : expenses = allExpenses
+      .where((expense) => expense.category == category)
+      .toList();
+
+  final Category category;
+  final List<Expense> expenses;
+
+  double get totalExpenses {
+    double sum = 0;
+
+    for (final expense in expenses) {
+      sum += expense.amount;
+    }
+
+    return sum;
+  }
+}