Can delete expense

moneymgr_mobile/lib/services/storage/expenses.dart

@@ -10,7 +10,6 @@ import 'package:path_provider/path_provider.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 
 part 'expenses.freezed.dart';
-
 part 'expenses.g.dart';
 
 typedef ExpensesList = List<Expense>;
@@ -157,11 +156,28 @@ class ExpensesManager {
   Future<void> updateExpense(Expense expense, BaseExpenseInfo newInfo) async {
     final list = await getList();
     final entry = list.indexWhere((e) => e.id == expense.id);
-    list[entry] = Expense(id: expense.id,
-        label: newInfo.label,
-        cost: newInfo.cost,
-        time: newInfo.timeAsSeconds,
-        mimeType: expense.mimeType);
+    list[entry] = Expense(
+      id: expense.id,
+      label: newInfo.label,
+      cost: newInfo.cost,
+      time: newInfo.timeAsSeconds,
+      mimeType: expense.mimeType,
+    );
     saveList(list);
   }
-}
+
+  /// Delete an expense
+  Future<void> deleteExpense(Expense expense) async {
+    // Remove expense from the list
+    final list = await getList();
+    await saveList(list.where((e) => e.id != expense.id).toList());
+
+    // Delete associated file, if any
+    final filePath = File(
+      p.join(filesStoragePath.absolute.path, expense.localFileName),
+    );
+    if (await filePath.exists()) {
+      await filePath.delete();
+    }
+  }
+}