mark pending messages failed on mainpage init

fixes #65

Author: Trolldemorted

Signal-Windows/Storage/DB.cs

@@ -654,6 +654,20 @@ public static void Migrate()
 
         #region Messages
 
+        public static void FailAllPendingMessages()
+        {
+            lock (DBLock)
+            {
+                using (var ctx = new SignalDBContext())
+                {
+                    var messages = ctx.Messages
+                        .Where(m => m.Direction == SignalMessageDirection.Outgoing && m.Status == SignalMessageStatus.Pending).ToList();
+                    messages.ForEach(m => m.Status = SignalMessageStatus.Failed_Unknown);
+                    ctx.SaveChanges();
+                }
+            }
+        }
+
         public static LinkedList<SignalMessage> InsertIdentityChangedMessages(string number)
         {
             long now = Util.CurrentTimeMillis();

Signal-Windows/ViewModels/MainPageViewModel.cs

@@ -108,6 +108,7 @@ public async Task Init()
             {
                 await Task.Run(async () =>
                 {
+                    SignalDBContext.FailAllPendingMessages();
                     List<SignalContact> contacts = SignalDBContext.GetAllContactsLocked();
                     List<SignalGroup> groups = SignalDBContext.GetAllGroupsLocked();
                     await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>