Can update scanned expenses entries

moneymgr_mobile/lib/services/storage/expenses.dart

@@ -1,6 +1,7 @@
 import 'dart:convert';
 import 'dart:io';
 import 'dart:math';
+import 'dart:typed_data';
 
 import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
@@ -8,17 +9,24 @@ import 'package:path/path.dart' as p;
 import 'package:path_provider/path_provider.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 
-part 'expenses.freezed.dart';part 'expenses.g.dart';
+part 'expenses.freezed.dart';
+
+part 'expenses.g.dart';
 
 typedef ExpensesList = List<Expense>;
 
 @freezed
 abstract class BaseExpenseInfo with _$BaseExpenseInfo {
+  const BaseExpenseInfo._();
+
   const factory BaseExpenseInfo({
     required String? label,
     required double cost,
     required DateTime time,
   }) = _BaseExpenseInfo;
+
+  /// Get expense time as second
+  int get timeAsSeconds => (time.millisecondsSinceEpoch / 1000).floor();
 }
 
 @freezed
@@ -45,6 +53,10 @@ abstract class Expense with _$Expense {
   factory Expense.fromJson(Map<String, dynamic> json) =>
       _$ExpenseFromJson(json);
 
+  /// Get base expense information
+  BaseExpenseInfo get baseExpense =>
+      BaseExpenseInfo(label: label, cost: cost, time: dateTime);
+
   /// Get associated expense file name
   String get localFileName {
     if (mimeType == "application/pdf") return "$id.pdf";
@@ -109,7 +121,7 @@ class ExpensesManager {
       id: (list.lastOrNull?.id ?? 0) + Random().nextInt(1000),
       label: info.label,
       cost: info.cost,
-      time: (info.time.millisecondsSinceEpoch / 1000).floor(),
+      time: info.timeAsSeconds,
       mimeType: fileMimeType,
     );
 
@@ -128,4 +140,28 @@ class ExpensesManager {
     list.add(exp);
     await saveList(list);
   }
-}
+
+  /// Get a single expense information by its ID
+  Future<Expense?> getById(int id) async {
+    final list = await getList();
+    return list.firstWhere((e) => e.id == id);
+  }
+
+  /// Load the file associated with an expense
+  Future<Uint8List> loadFile(Expense expense) async {
+    final path = p.join(filesStoragePath.absolute.path, expense.localFileName);
+    return File(path).readAsBytes();
+  }
+
+  /// Update expense information
+  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);
+    saveList(list);
+  }
+}