Feature: Auto restore tabs if the app crashes (#12005)

Author: hishitetsu

src/Files.App/App.xaml.cs

@@ -47,6 +47,7 @@
 using Windows.ApplicationModel;
 using Windows.ApplicationModel.DataTransfer;
 using Windows.Storage;
+using Windows.System;
 using Windows.UI.Notifications;
 
 namespace Files.App
@@ -445,19 +446,41 @@ private static void AppUnhandledException(Exception ex, bool shouldShowNotificat
 				{
 					Buttons =
 					{
-						new ToastButton("ExceptionNotificationReportButton".GetLocalizedResource(), "report")
+						new ToastButton("ExceptionNotificationReportButton".GetLocalizedResource(), Constants.GitHub.BugReportUrl)
 						{
-							ActivationType = ToastActivationType.Foreground
+							ActivationType = ToastActivationType.Protocol
 						}
 					}
-				}
+				},
+				ActivationType = ToastActivationType.Protocol
 			};
 
 			// Create the toast notification
 			var toastNotif = new ToastNotification(toastContent.GetXml());
 
 			// And send the notification
 			ToastNotificationManager.CreateToastNotifier().Show(toastNotif);
+
+			// Restart the app
+			var userSettingsService = Ioc.Default.GetRequiredService<IUserSettingsService>();
+			var lastSessionTabList = userSettingsService.GeneralSettingsService.LastSessionTabList;
+
+			if (userSettingsService.GeneralSettingsService.LastCrashedTabList?.SequenceEqual(lastSessionTabList) ?? false)
+			{
+				// Avoid infinite restart loop
+				userSettingsService.GeneralSettingsService.LastSessionTabList = null;
+			}
+			else
+			{
+				userSettingsService.AppSettingsService.RestoreTabsOnStartup = true;
+				userSettingsService.GeneralSettingsService.LastCrashedTabList = lastSessionTabList;
+			}
+
+			Window.DispatcherQueue.EnqueueAsync(async () =>
+			{
+				await Launcher.LaunchUriAsync(new Uri("files-uwp:"));
+			}).Wait(1000);
+			Process.GetCurrentProcess().Kill();
 		}
 
 		public static void CloseApp()

src/Files.App/MainWindow.xaml.cs

@@ -139,16 +139,6 @@ public async Task InitializeApplication(object activatedEventArgs)
 					}
 					break;
 
-				case IToastNotificationActivatedEventArgs eventArgsForNotification:
-					if (eventArgsForNotification.Argument == "report")
-					{
-						await Windows.System.Launcher.LaunchUriAsync(new Uri(Constants.GitHub.BugReportUrl));
-					}
-					break;
-
-				case IStartupTaskActivatedEventArgs:
-					break;
-
 				case IFileActivatedEventArgs fileArgs:
 					var index = 0;
 					if (rootFrame.Content is null)

src/Files.App/ServicesImplementation/Settings/GeneralSettingsService.cs

@@ -63,6 +63,12 @@ public List<string> LastSessionTabList
 			set => Set(value);
 		}
 
+		public List<string> LastCrashedTabList
+		{
+			get => Get<List<string>>(null);
+			set => Set(value);
+		}
+
 		public DateTimeFormats DateTimeFormat
 		{
 			get => Get(DateTimeFormats.Application);

src/Files.App/ServicesImplementation/Settings/UserSettingsService.cs

@@ -69,6 +69,7 @@ public override object ExportSettings()
 
 			// Remove session settings
 			export.Remove(nameof(GeneralSettingsService.LastSessionTabList));
+			export.Remove(nameof(GeneralSettingsService.LastCrashedTabList));
 
 			return JsonSettingsSerializer.SerializeToJson(export);
 		}

src/Files.Backend/Services/Settings/IGeneralSettingsService.cs

@@ -46,6 +46,11 @@ public interface IGeneralSettingsService : IBaseSettingsService, INotifyProperty
 		/// </summary>
 		List<string> LastSessionTabList { get; set; }
 
+		/// <summary>
+		/// A list containing paths of the tabs from the previous session that crashed.
+		/// </summary>
+		List<string> LastCrashedTabList { get; set; }
+
 		/// <summary>
 		/// Gets or sets a value indicating which date and time format to use.
 		/// </summary>