From fd3f15257f6d1eff019f310dd50ae27c6b3eb7f0 Mon Sep 17 00:00:00 2001
From: tamara-slosarek <tamara.slosarek@mssm.edu>
Date: Tue, 28 Nov 2023 14:58:00 +0100
Subject: [PATCH] fix(app): fix hot restart with activeDrugs and add comment

---
 app/lib/common/models/userdata/userdata.dart | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/app/lib/common/models/userdata/userdata.dart b/app/lib/common/models/userdata/userdata.dart
index 2f94ec68..4bfd8033 100644
--- a/app/lib/common/models/userdata/userdata.dart
+++ b/app/lib/common/models/userdata/userdata.dart
@@ -171,8 +171,15 @@ class UserData {
   }
 }
 
+// Wrapper of UserData.instance.activeDrugNames that manages changes; used to
+// notify inactive tabs in case of changes. Should be refacored to ensure
+// consistent use accross the app, see
+// https://github.com/hpi-dhc/PharMe/issues/680
 class ActiveDrugs extends ChangeNotifier {
-  List<String> names = [];
+  ActiveDrugs() {
+    names = UserData.instance.activeDrugNames ?? [];
+  }
+  late List<String> names;
 
   Future<void> _preserveAndNotify() async {
     UserData.instance.activeDrugNames = names;
@@ -207,6 +214,10 @@ class ActiveDrugs extends ChangeNotifier {
   bool contains(String drugName) {
     return names.contains(drugName);
   }
+
+  bool isNotEmpty() {
+    return names.isNotEmpty;
+  }
 }
 
 /// Initializes the user's data by registering all necessary adapters and