fix error when login token expires

src/App/App.xaml.cs

@@ -97,7 +97,8 @@ namespace Bit.App
                 }
                 else if(message.Command == "logout")
                 {
-                    Device.BeginInvokeOnMainThread(async () => await LogOutAsync(false));
+                    Device.BeginInvokeOnMainThread(async () =>
+                        await LogOutAsync((message.Data as bool?).GetValueOrDefault()));
                 }
                 else if(message.Command == "loggedOut")
                 {
@@ -240,6 +241,10 @@ namespace Bit.App
             _authService.LogOut(() =>
             {
                 Current.MainPage = new HomePage();
+                if(expired)
+                {
+                    _platformUtilsService.ShowToast("warning", null, AppResources.LoginExpired);
+                }
             });
         }
 

src/App/Pages/Vault/AddEditPageViewModel.cs

@@ -456,7 +456,10 @@ namespace Bit.App.Pages
             catch(ApiException e)
             {
                 await _deviceActionService.HideLoadingAsync();
-                await Page.DisplayAlert(AppResources.AnErrorHasOccurred, e.Error.GetSingleMessage(), AppResources.Ok);
+                if(e?.Error != null)
+                {
+                    await Page.DisplayAlert(AppResources.AnErrorHasOccurred, e.Error.GetSingleMessage(), AppResources.Ok);
+                }
             }
             return false;
         }

src/App/Resources/AppResources.Designer.cs

@@ -2274,6 +2274,15 @@ namespace Bit.App.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Your login session has expired..
+        /// </summary>
+        public static string LoginExpired {
+            get {
+                return ResourceManager.GetString("LoginExpired", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Login.
         /// </summary>

src/App/Resources/AppResources.resx

@@ -1575,4 +1575,7 @@
   <data name="ToggleVisibility" xml:space="preserve">
     <value>Toggle Visibility</value>
   </data>
+  <data name="LoginExpired" xml:space="preserve">
+    <value>Your login session has expired.</value>
+  </data>
 </root>

src/Core/Services/SyncService.cs

@@ -23,7 +23,7 @@ namespace Bit.Core.Services
         private readonly ICollectionService _collectionService;
         private readonly IStorageService _storageService;
         private readonly IMessagingService _messagingService;
-        private readonly Action _logoutCallback;
+        private readonly Func<bool, Task> _logoutCallbackAsync;
 
         public SyncService(
             IUserService userService,
@@ -35,7 +35,7 @@ namespace Bit.Core.Services
             ICollectionService collectionService,
             IStorageService storageService,
             IMessagingService messagingService,
-            Action logoutCallback)
+            Func<bool, Task> logoutCallbackAsync)
         {
             _userService = userService;
             _apiService = apiService;
@@ -46,7 +46,7 @@ namespace Bit.Core.Services
             _collectionService = collectionService;
             _storageService = storageService;
             _messagingService = messagingService;
-            _logoutCallback = logoutCallback;
+            _logoutCallbackAsync = logoutCallbackAsync;
         }
 
         public bool SyncInProgress { get; set; }
@@ -307,7 +307,10 @@ namespace Bit.Core.Services
             var stamp = await _userService.GetSecurityStampAsync();
             if(stamp != null && stamp != response.SecurityStamp)
             {
-                _logoutCallback?.Invoke();
+                if(_logoutCallbackAsync != null)
+                {
+                    await _logoutCallbackAsync(true);
+                }
                 return;
             }
             await _cryptoService.SetEncKeyAsync(response.Key);

src/Core/Utilities/ServiceContainer.cs

@@ -31,8 +31,11 @@ namespace Bit.Core.Utilities
             var cryptoFunctionService = new PclCryptoFunctionService(cryptoPrimitiveService);
             var cryptoService = new CryptoService(storageService, secureStorageService, cryptoFunctionService);
             var tokenService = new TokenService(storageService);
-            var apiService = new ApiService(tokenService, platformUtilsService, (bool expired) => Task.FromResult(0),
+            var apiService = new ApiService(tokenService, platformUtilsService, (bool expired) =>
-                customUserAgent);
+            {
+                messagingService.Send("logout", expired);
+                return Task.FromResult(0);
+            }, customUserAgent);
             var appIdService = new AppIdService(storageService);
             var userService = new UserService(storageService, tokenService);
             var settingsService = new SettingsService(userService, storageService);
@@ -45,8 +48,11 @@ namespace Bit.Core.Utilities
             var lockService = new LockService(cryptoService, userService, platformUtilsService, storageService,
                 folderService, cipherService, collectionService, searchService, messagingService, null);
             var syncService = new SyncService(userService, apiService, settingsService, folderService,
-                cipherService, cryptoService, collectionService, storageService, messagingService,
+                cipherService, cryptoService, collectionService, storageService, messagingService, (bool expired) =>
-                () => messagingService.Send("logout"));
+                {
+                    messagingService.Send("logout", expired);
+                    return Task.FromResult(0);
+                });
             var passwordGenerationService = new PasswordGenerationService(cryptoService, storageService,
                 cryptoFunctionService);
             var totpService = new TotpService(storageService, cryptoFunctionService);