Full trust Wino Server implementation. (#295)

* Separation of messages. Introducing Wino.Messages library.

* Wino.Server and Wino.Packaging projects. Enabling full trust for UWP and app service connection manager basics.

* Remove debug code.

* Enable generating assembly info to deal with unsupported os platform warnings.

* Fix server-client connection.

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

* Removed IWinoSynchronizerFactory from UWP project.

* Removal of background task service from core.

* Delegating changes to UI and triggering new background synchronization.

* Fix build error.

* Moved core lib messages to Messaging project.

* Better client-server communication. Handling of requests in the server. New synchronizer factory in the server.

* WAM broker and MSAL token caching for OutlookAuthenticator. Handling account creation for Outlook.

* WinoServerResponse basics.

* Delegating protocol activation for Gmail authenticator.

* Adding margin to searchbox to match action bar width.

* Move libraries into lib folder.

* Storing base64 encoded mime on draft creation instead of MimeMessage object. Fixes serialization/deserialization issue with S.T.Json

* Scrollbar adjustments

* WınoExpander for thread expander layout ıssue.

* Handling synchronizer state changes.

* Double init on background activation.

* FIxing packaging issues and new Wino Mail launcher protocol for activation from full thrust process.

* Remove debug deserialization.

* Remove debug code.

* Making sure the server connection is established when the app is launched.

* Thrust -> Trust string replacement...

* Rename package to Wino Mail

* Enable translated values in the server.

* Fixed an issue where toast activation can't find the clicked mail after the folder is initialized.

* Revert debug code.

* Change server background sync to every 3 minute and Inbox only synchronization.

* Revert google auth changes.

* App preferences page.

* Changing tray icon visibility on preference change.

* Start the server with invisible tray icon if set to invisible.

* Reconnect button on the title bar.

* Handling of toast actions.

* Enable x86 build for server during packaging.

* Get rid of old background tasks and v180 migration.

* Terminate client when Exit clicked in server.

* Introducing SynchronizationSource to prevent notifying UI after server tick synchronization.

* Remove confirmAppClose restricted capability and unused debug code in manifest.

* Closing the reconnect info popup when reconnect is clicked.

* Custom RetryHandler for OutlookSynchronizer and separating client/server logs.

* Running server on Windows startup.

* Fix startup exe.

* Fix for expander list view item paddings.

* Force full sync on app launch instead of Inbox.

* Fix draft creation.

* Fix an issue with custom folder sync logic.

* Reporting back account sync progress from server.

* Fix sending drafts and missing notifications for imap.

* Changing imap folder sync requirements.

* Retain file  count is set to 3.

* Disabled swipe gestures temporarily due to native crash
 with SwipeControl

* Save all attachments implementation.

* Localization for save all attachments button.

* Fix logging dates for logs.

* Fixing ARM64 build.

* Add ARM64 build config to packaging project.

* Comment out OutOfProcPDB for ARM64.

* Hnadling GONE response for Outlook folder synchronization.

Wino.Core/Authenticators/GmailAuthenticator.cs

@@ -1,10 +1,8 @@
 using System;
 using System.Net.Http;
 using System.Text;
-using System.Threading;
 using System.Threading.Tasks;
 using Newtonsoft.Json.Linq;
-using Nito.AsyncEx;
 using Wino.Core.Domain;
 using Wino.Core.Domain.Entities;
 using Wino.Core.Domain.Enums;
@@ -13,11 +11,10 @@ using Wino.Core.Domain.Interfaces;
 using Wino.Core.Domain.Models.Authentication;
 using Wino.Core.Domain.Models.Authorization;
 using Wino.Core.Services;
-using Xamarin.Essentials;
 
 namespace Wino.Core.Authenticators
 {
-    public class GmailAuthenticator : BaseAuthenticator, IAuthenticator
+    public class GmailAuthenticator : BaseAuthenticator, IGmailAuthenticator
     {
         public string ClientId { get; } = "973025879644-s7b4ur9p3rlgop6a22u7iuptdc0brnrn.apps.googleusercontent.com";
 
@@ -27,9 +24,6 @@ namespace Wino.Core.Authenticators
 
         public override MailProviderType ProviderType => MailProviderType.Gmail;
 
-        private TaskCompletionSource<Uri> _authorizationCompletionSource = null;
-        private CancellationTokenSource _authorizationCancellationTokenSource = null;
-
         private readonly INativeAppService _nativeAppService;
 
         public event EventHandler<string> InteractiveAuthenticationRequired;
@@ -99,8 +93,6 @@ namespace Wino.Core.Authenticators
             };
         }
 
-        public void ContinueAuthorization(Uri authorizationResponseUri) => _authorizationCompletionSource?.TrySetResult(authorizationResponseUri);
-
         public async Task<TokenInformation> GetTokenAsync(MailAccount account)
         {
             var cachedToken = await TokenService.GetTokenInformationAsync(account.Id)
@@ -127,29 +119,19 @@ namespace Wino.Core.Authenticators
         {
             var authRequest = _nativeAppService.GetGoogleAuthorizationRequest();
 
-            _authorizationCompletionSource = new TaskCompletionSource<Uri>();
-            _authorizationCancellationTokenSource = new CancellationTokenSource();
-
             var authorizationUri = authRequest.BuildRequest(ClientId);
 
-            await Browser.OpenAsync(authorizationUri, BrowserLaunchMode.SystemPreferred);
-
             Uri responseRedirectUri = null;
 
             try
             {
-                responseRedirectUri = await _authorizationCompletionSource.Task.WaitAsync(_authorizationCancellationTokenSource.Token);
+                //await _authorizationCompletionSource.Task.WaitAsync(_authorizationCancellationTokenSource.Token);
+                responseRedirectUri = await _nativeAppService.GetAuthorizationResponseUriAsync(this, authorizationUri);
             }
-            catch (OperationCanceledException)
+            catch (Exception)
             {
                 throw new AuthenticationException(Translator.Exception_AuthenticationCanceled);
             }
-            finally
-            {
-                _authorizationCancellationTokenSource.Dispose();
-                _authorizationCancellationTokenSource = null;
-                _authorizationCompletionSource = null;
-            }
 
             authRequest.ValidateAuthorizationCode(responseRedirectUri);
 
@@ -213,7 +195,5 @@ namespace Wino.Core.Authenticators
                 RefreshToken = activeRefreshToken
             };
         }
-
-        public void CancelAuthorization() => _authorizationCancellationTokenSource?.Cancel();
     }
 }