UIMessage communication. Single instancing for server and re-connection mechanism on suspension.

Wino.Mail/Activation/BackgroundActivationHandler.cs

@@ -1,18 +1,15 @@
-using System.Diagnostics;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Microsoft.Toolkit.Uwp.Notifications;
 using Serilog;
 using Windows.ApplicationModel.Activation;
 using Windows.ApplicationModel.Background;
 using Windows.UI.Notifications;
-using Wino.Core;
 using Wino.Core.Domain;
 using Wino.Core.Domain.Enums;
 using Wino.Core.Domain.Interfaces;
 using Wino.Core.Domain.Models.MailItem;
 using Wino.Core.Domain.Models.Synchronization;
 using Wino.Core.UWP.Services;
-using Wino.Services;
 
 namespace Wino.Activation
 {
@@ -21,7 +18,6 @@ namespace Wino.Activation
         private const string BackgroundExecutionLogTag = "[BackgroundExecution] ";
 
         private readonly IWinoRequestDelegator _winoRequestDelegator;
-        private readonly IBackgroundSynchronizer _backgroundSynchronizer;
         private readonly INativeAppService _nativeAppService;
         private readonly IWinoRequestProcessor _winoRequestProcessor;
         private readonly IWinoSynchronizerFactory _winoSynchronizerFactory;
@@ -30,14 +26,12 @@ namespace Wino.Activation
 
         BackgroundTaskDeferral _deferral;
         public BackgroundActivationHandler(IWinoRequestDelegator winoRequestDelegator,
-                                           IBackgroundSynchronizer backgroundSynchronizer,
                                            INativeAppService nativeAppService,
                                            IWinoRequestProcessor winoRequestProcessor,
                                            IWinoSynchronizerFactory winoSynchronizerFactory,
                                            IMailService mailService)
         {
             _winoRequestDelegator = winoRequestDelegator;
-            _backgroundSynchronizer = backgroundSynchronizer;
             _nativeAppService = nativeAppService;
             _winoRequestProcessor = winoRequestProcessor;
             _winoSynchronizerFactory = winoSynchronizerFactory;
@@ -104,18 +98,6 @@ namespace Wino.Activation
                     }
                 }
             }
-            else if (taskName == BackgroundTaskService.BackgroundSynchronizationTimerTaskNameEx)
-            {
-                var watch = new Stopwatch();
-                watch.Start();
-
-                // Run timer based background synchronization.
-
-                await _backgroundSynchronizer.RunBackgroundSynchronizationAsync(BackgroundSynchronizationReason.Timer);
-
-                watch.Stop();
-                Log.Information($"{BackgroundExecutionLogTag}Background synchronization is completed in {watch.Elapsed.TotalSeconds} seconds.");
-            }
 
             instance.Canceled -= OnBackgroundExecutionCanceled;
 

Wino.Mail/App.xaml.cs

@@ -66,6 +66,8 @@ namespace Wino
             UnhandledException += OnAppUnhandledException;
             EnteredBackground += OnEnteredBackground;
             LeavingBackground += OnLeavingBackground;
+
+            Resuming += OnResuming;
             Suspending += OnSuspending;
 
             Services = ConfigureServices();
@@ -87,6 +89,15 @@ namespace Wino
             Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
         }
 
+        private async void OnResuming(object sender, object e)
+        {
+            // App Service connection was lost on suspension.
+            // We must restore it.
+            // Server might be running already, but re-launching it will trigger a new connection attempt.
+
+            await _appServiceConnectionManager.ConnectAsync();
+        }
+
         private void OnSuspending(object sender, SuspendingEventArgs e)
         {
             var deferral = e.SuspendingOperation.GetDeferral();
@@ -328,10 +339,12 @@ namespace Wino
             yield return Services.GetService<FileActivationHandler>();
         }
 
-        public void OnBackgroundTaskCanceled(IBackgroundTaskInstance sender, BackgroundTaskCancellationReason reason)
+        public async void OnBackgroundTaskCanceled(IBackgroundTaskInstance sender, BackgroundTaskCancellationReason reason)
         {
             Log.Information($"Background task {sender.Task.Name} was canceled. Reason: {reason}");
 
+            await _appServiceConnectionManager.DisconnectAsync();
+
             backgroundTaskDeferral?.Complete();
             backgroundTaskDeferral = null;
 

Wino.Mail/AppShell.xaml

@@ -521,7 +521,7 @@
                     Padding="14"
                     HorizontalAlignment="Right"
                     VerticalAlignment="Bottom">
-                    <TextBlock Text="{x:Bind ViewModel.ServerConnectionManager.Status, Mode=OneWay}" />
+                    <TextBlock Text="{x:Bind ViewModel.ActiveConnectionStatus, Mode=OneWay}" />
                 </Grid>
             </Grid>
         </muxc:NavigationView>

Wino.Mail/Services/DialogService.cs

@@ -20,7 +20,7 @@ using Wino.Core.Messages.Shell;
 using Wino.Core.Messages.Synchronization;
 using Wino.Core.UWP.Extensions;
 using Wino.Dialogs;
-using Wino.Messages.Server;
+using Wino.Messaging.Server;
 
 namespace Wino.Services
 {

Wino.Mail/Views/NewAccountManagementPage.xaml.cs

@@ -8,7 +8,7 @@ using Windows.UI.Xaml.Navigation;
 using Wino.Core.Domain.Enums;
 using Wino.Core.Messages.Navigation;
 using Wino.Mail.ViewModels.Data;
-using Wino.Messages.Server;
+using Wino.Messaging.Server;
 using Wino.Views.Abstract;
 using Wino.Views.Account;
 using Wino.Views.Settings;

Wino.Mail/Wino.Mail.csproj

@@ -801,9 +801,9 @@
       <Project>{d62f1c03-da57-4709-a640-0283296a8e66}</Project>
       <Name>Wino.Mail.ViewModels</Name>
     </ProjectReference>
-    <ProjectReference Include="..\Wino.Messages\Wino.Messages.csproj">
+    <ProjectReference Include="..\Wino.Messages\Wino.Messaging.csproj">
       <Project>{0c307d7e-256f-448c-8265-5622a812fbcc}</Project>
-      <Name>Wino.Messages</Name>
+      <Name>Wino.Messaging</Name>
     </ProjectReference>
   </ItemGroup>
   <ItemGroup>
@@ -811,9 +811,7 @@
       <Name>Windows Desktop Extensions for the UWP</Name>
     </SDKReference>
   </ItemGroup>
-  <ItemGroup>
-    <Folder Include="Server\" />
-  </ItemGroup>
+  <ItemGroup />
   <PropertyGroup Condition=" '$(VisualStudioVersion)' == '' or '$(VisualStudioVersion)' &lt; '14.0' ">
     <VisualStudioVersion>14.0</VisualStudioVersion>
   </PropertyGroup>