Initial commit.

Wino.Mail/Activation/ActivationHandler.cs

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+using System.Threading.Tasks;
+
+namespace Wino.Activation
+{
+    // For more information on understanding and extending activation flow see
+    // https://github.com/microsoft/TemplateStudio/blob/main/docs/UWP/activation.md
+    internal abstract class ActivationHandler
+    {
+        public abstract bool CanHandle(object args);
+
+        public abstract Task HandleAsync(object args);
+    }
+
+    // Extend this class to implement new ActivationHandlers
+    internal abstract class ActivationHandler<T> : ActivationHandler
+        where T : class
+    {
+        // Override this method to add the activation logic in your activation handler
+        protected abstract Task HandleInternalAsync(T args);
+
+        public override async Task HandleAsync(object args)
+        {
+            await HandleInternalAsync(args as T);
+        }
+
+        public override bool CanHandle(object args)
+        {
+            // CanHandle checks the args is of type you have configured
+            return args is T && CanHandleInternal(args as T);
+        }
+
+        // You can override this method to add extra validation on activation args
+        // to determine if your ActivationHandler should handle this activation args
+        protected virtual bool CanHandleInternal(T args)
+        {
+            return true;
+        }
+    }
+}

Wino.Mail/Activation/BackgroundActivationHandler.cs

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+using System;
+using System.Diagnostics;
+using System.Threading.Tasks;
+using Microsoft.Toolkit.Uwp.Notifications;
+using Serilog;
+using Windows.ApplicationModel.Activation;
+using Windows.ApplicationModel.Background;
+using Windows.ApplicationModel.Core;
+using Windows.UI.Core;
+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
+{
+    internal class BackgroundActivationHandler : ActivationHandler<BackgroundActivatedEventArgs>
+    {
+        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;
+        private readonly IMailService _mailService;
+        private ToastArguments _toastArguments;
+
+        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;
+            _mailService = mailService;
+        }
+
+        protected override async Task HandleInternalAsync(BackgroundActivatedEventArgs args)
+        {
+            var instance = args.TaskInstance;
+            var taskName = instance.Task.Name;
+
+            instance.Canceled -= OnBackgroundExecutionCanceled;
+            instance.Canceled += OnBackgroundExecutionCanceled;
+
+            _deferral = instance.GetDeferral();
+
+            if (taskName == BackgroundTaskService.ToastActivationTaskEx)
+            {
+                // ToastNotificationActionTriggerDetail somehow use UI thread.
+                // Calling this without a dispatcher will result in error.
+
+                await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.High, () =>
+                {
+                    if (instance.TriggerDetails is ToastNotificationActionTriggerDetail toastNotificationActionTriggerDetail)
+                        _toastArguments = ToastArguments.Parse(toastNotificationActionTriggerDetail.Argument);
+                });
+
+                // All toast activation mail actions are handled here like mark as read or delete.
+                // This should not launch the application on the foreground.
+
+                // Get the action and mail item id.
+                // Prepare package and send to delegator.
+
+                if (_toastArguments.TryGetValue(Constants.ToastMailItemIdKey, out string mailItemId) &&
+                    _toastArguments.TryGetValue(Constants.ToastActionKey, out MailOperation action))
+                {
+                    // TODO: Remote folder id.
+                    var mailItem = await _mailService.GetSingleMailItemAsync(mailItemId, string.Empty);
+
+                    if (mailItem == null) return;
+
+                    if (_nativeAppService.IsAppRunning())
+                    {
+                        // Just send the package. We should reflect the UI changes as well.
+                        var package = new MailOperationPreperationRequest(action, mailItem);
+
+                        await _winoRequestDelegator.ExecuteAsync(package);
+                    }
+                    else
+                    {
+                        // We need to synchronize changes without reflection the UI changes.
+
+                        var synchronizer = _winoSynchronizerFactory.GetAccountSynchronizer(mailItem.AssignedAccount.Id);
+                        var prepRequest = new MailOperationPreperationRequest(action, mailItem);
+
+                        var requests = await _winoRequestProcessor.PrepareRequestsAsync(prepRequest);
+
+                        foreach (var request in requests)
+                        {
+                            synchronizer.QueueRequest(request);
+                        }
+
+                        var options = new SynchronizationOptions()
+                        {
+                            Type = SynchronizationType.ExecuteRequests,
+                            AccountId = mailItem.AssignedAccount.Id
+                        };
+
+                        await synchronizer.SynchronizeAsync(options);
+                    }
+                }
+            }
+            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($"{BackgroundExecutionLogTag}Background synchronization is completed in {watch.Elapsed.TotalSeconds} seconds.");
+            }
+
+            instance.Canceled -= OnBackgroundExecutionCanceled;
+
+            _deferral.Complete();
+        }
+
+        private void OnBackgroundExecutionCanceled(Windows.ApplicationModel.Background.IBackgroundTaskInstance sender, Windows.ApplicationModel.Background.BackgroundTaskCancellationReason reason)
+        {
+            Log.Error($"{BackgroundExecutionLogTag} ({sender.Task.Name}) Background task is canceled. Reason -> {reason}");
+
+            _deferral?.Complete();
+        }
+
+        protected override bool CanHandleInternal(BackgroundActivatedEventArgs args)
+        {
+            var instance = args.TaskInstance;
+            var taskName = instance.Task.Name;
+
+            if (taskName == BackgroundTaskService.ToastActivationTaskEx)
+            {
+                // User clicked Mark as Read or Delete in toast notification.
+                // MailId and Action must present in the arguments.
+
+                return true;
+
+                //if (instance.TriggerDetails is ToastNotificationActionTriggerDetail toastNotificationActionTriggerDetail)
+                //{
+                //    _toastArguments = ToastArguments.Parse(toastNotificationActionTriggerDetail.Argument);
+
+                //    return
+                //        _toastArguments.Contains(Constants.ToastMailItemIdKey) &&
+                //        _toastArguments.Contains(Constants.ToastActionKey);
+                //}
+
+            }
+            else if (taskName == BackgroundTaskService.BackgroundSynchronizationTimerTaskNameEx)
+            {
+                // This is timer based background synchronization.
+
+
+                return true;
+            }
+
+            return false;
+        }
+    }
+}

Wino.Mail/Activation/DefaultActivationHandler.cs

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+using System.Threading.Tasks;
+using Windows.ApplicationModel.Activation;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Media.Animation;
+using Wino.Views;
+
+namespace Wino.Activation
+{
+    internal class DefaultActivationHandler : ActivationHandler<IActivatedEventArgs>
+    {
+        protected override Task HandleInternalAsync(IActivatedEventArgs args)
+        {
+            (Window.Current.Content as Frame).Navigate(typeof(AppShell), null, new DrillInNavigationTransitionInfo());
+
+            return Task.CompletedTask;
+        }
+
+        // Only navigate if Frame content doesn't exist.
+        protected override bool CanHandleInternal(IActivatedEventArgs args)
+            => (Window.Current?.Content as Frame)?.Content == null;
+    }
+}

Wino.Mail/Activation/FileActivationHandler.cs

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+using System;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using Windows.ApplicationModel.Activation;
+using Windows.Storage;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Media.Animation;
+using Wino.Core.Domain.Interfaces;
+using Wino.Core.Services;
+using Wino.Helpers;
+using Wino.Views;
+
+namespace Wino.Activation
+{
+    internal class FileActivationHandler : ActivationHandler<FileActivatedEventArgs>
+    {
+        private readonly INativeAppService _nativeAppService;
+        private readonly IMimeFileService _mimeFileService;
+        private readonly IStatePersistanceService _statePersistanceService;
+        private readonly IWinoNavigationService _winoNavigationService;
+
+        public FileActivationHandler(INativeAppService nativeAppService,
+                                     IMimeFileService mimeFileService,
+                                     IStatePersistanceService statePersistanceService,
+                                     IWinoNavigationService winoNavigationService)
+        {
+            _nativeAppService = nativeAppService;
+            _mimeFileService = mimeFileService;
+            _statePersistanceService = statePersistanceService;
+            _winoNavigationService = winoNavigationService;
+        }
+
+        protected override async Task HandleInternalAsync(FileActivatedEventArgs args)
+        {
+            // Always handle the last item passed.
+            // Multiple files are not supported.
+
+            var file = args.Files.Last() as StorageFile;
+
+            // Only EML files are supported now.
+            var fileExtension = Path.GetExtension(file.Path);
+
+            if (string.Equals(fileExtension, ".eml", StringComparison.OrdinalIgnoreCase))
+            {
+                var fileBytes = await file.ReadBytesAsync();
+                var directoryName = Path.GetDirectoryName(file.Path);
+
+                var messageInformation = await _mimeFileService.GetMimeMessageInformationAsync(fileBytes, directoryName).ConfigureAwait(false);
+
+                if (_nativeAppService.IsAppRunning())
+                {
+                    // TODO: Activate another Window and go to mail rendering page.
+                    _winoNavigationService.NavigateRendering(messageInformation);
+                }
+                else
+                {
+                    _statePersistanceService.ShouldShiftMailRenderingDesign = true;
+                    (Window.Current.Content as Frame).Navigate(typeof(MailRenderingPage), messageInformation, new DrillInNavigationTransitionInfo());
+                }
+            }
+        }
+
+        protected override bool CanHandleInternal(FileActivatedEventArgs args) => args.Files.Any();
+
+    }
+}

Wino.Mail/Activation/ProtocolActivationHandler.cs

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+using System.Threading.Tasks;
+using System.Web;
+using CommunityToolkit.Mvvm.Messaging;
+using Windows.ApplicationModel.Activation;
+using Wino.Core.Domain.Interfaces;
+using Wino.Core.Messages.Authorization;
+using Wino.Core.Messages.Shell;
+
+namespace Wino.Activation
+{
+    internal class ProtocolActivationHandler : ActivationHandler<ProtocolActivatedEventArgs>
+    {
+        private const string GoogleAuthorizationProtocolTag = "google.pw.oauth2";
+        private const string MailtoProtocolTag = "mailto:";
+
+        private readonly INativeAppService _nativeAppService;
+        private readonly ILaunchProtocolService _launchProtocolService;
+
+        public ProtocolActivationHandler(INativeAppService nativeAppService, ILaunchProtocolService launchProtocolService)
+        {
+            _nativeAppService = nativeAppService;
+            _launchProtocolService = launchProtocolService;
+        }
+
+        protected override Task HandleInternalAsync(ProtocolActivatedEventArgs args)
+        {
+            // Check URI prefix.
+
+            var protocolString = args.Uri.AbsoluteUri;
+
+            // Google OAuth Response
+            if (protocolString.StartsWith(GoogleAuthorizationProtocolTag))
+            {
+                // App must be working already. No need to check for running state.
+                WeakReferenceMessenger.Default.Send(new ProtocolAuthorizationCallbackReceived(args.Uri));
+            }
+            else if (protocolString.StartsWith(MailtoProtocolTag))
+            {
+                // mailto activation. Try to parse params.
+
+                var replaced = protocolString.Replace(MailtoProtocolTag, "mailto=");
+                replaced = Wino.Core.Extensions.StringExtensions.ReplaceFirst(replaced, "?", "&");
+
+                _launchProtocolService.MailtoParameters = HttpUtility.ParseQueryString(replaced);
+
+                if (_nativeAppService.IsAppRunning())
+                {
+                    // Just send publish a message. Shell will continue.
+                    WeakReferenceMessenger.Default.Send(new MailtoProtocolMessageRequested());
+                }
+            }
+
+            return Task.CompletedTask;
+        }
+    }
+}

Wino.Mail/Activation/ToastNotificationActivationHandler.cs

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+using System;
+using System.Threading.Tasks;
+using CommunityToolkit.Mvvm.Messaging;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Toolkit.Uwp.Notifications;
+using Serilog;
+using Windows.ApplicationModel.Activation;
+using Wino.Core.Domain;
+using Wino.Core.Domain.Interfaces;
+using Wino.Core.Messages.Accounts;
+
+namespace Wino.Activation
+{
+    /// <summary>
+    /// This handler will only handle the toasts that runs on foreground.
+    /// Background executions are not handled here like mark as read or delete.
+    /// </summary>
+    internal class ToastNotificationActivationHandler : ActivationHandler<ToastNotificationActivatedEventArgs>
+    {
+        private readonly INativeAppService _nativeAppService;
+        private readonly IMailService _mailService;
+        private readonly IFolderService _folderService;
+
+        private ToastArguments _toastArguments;
+
+        public ToastNotificationActivationHandler(INativeAppService nativeAppService,
+                                                  IMailService mailService,
+                                                  IFolderService folderService)
+        {
+            _nativeAppService = nativeAppService;
+            _mailService = mailService;
+            _folderService = folderService;
+        }
+
+        protected override async Task HandleInternalAsync(ToastNotificationActivatedEventArgs args)
+        {
+            // Create the mail item navigation event.
+            // If the app is running, it'll be picked up by the Messenger.
+            // Otherwise we'll save it and handle it when the shell loads all accounts.
+
+            // Parse the mail unique id and perform above actions.
+            if (Guid.TryParse(_toastArguments[Constants.ToastMailItemIdKey], out Guid mailItemUniqueId))
+            {
+                var account = await _mailService.GetMailAccountByUniqueIdAsync(mailItemUniqueId).ConfigureAwait(false);
+                if (account == null) return;
+
+                var mailItem = await _mailService.GetSingleMailItemAsync(mailItemUniqueId).ConfigureAwait(false);
+                if (mailItem == null) return;
+
+                var message = new AccountMenuItemExtended(mailItem.AssignedFolder.Id, mailItem);
+
+                // Delegate this event to LaunchProtocolService so app shell can pick it up on launch if app doesn't work.
+                var launchProtocolService = App.Current.Services.GetService<ILaunchProtocolService>();
+                launchProtocolService.LaunchParameter = message;
+
+                // Send the messsage anyways. Launch protocol service will be ignored if the message is picked up by subscriber shell.
+                WeakReferenceMessenger.Default.Send(message);
+            }
+        }
+
+        protected override bool CanHandleInternal(ToastNotificationActivatedEventArgs args)
+        {
+            try
+            {
+                _toastArguments = ToastArguments.Parse(args.Argument);
+
+                return
+                    _toastArguments.Contains(Constants.ToastMailItemIdKey) &&
+                    _toastArguments.Contains(Constants.ToastActionKey);
+            }
+            catch (Exception ex)
+            {
+                Log.Error(ex, "Couldn't handle parsing toast notification arguments for foreground navigate.");
+            }
+
+            return false;
+        }
+    }
+}