AppShareTarget.cs

//-----------------------------------------------------------------------------------
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//  The MIT License (MIT)
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using System;
using System.Linq;
using Microsoft.Practices.ServiceLocation;
using Microsoft.Practices.Unity;
using PhotoSharingApp.Universal.Facades;
using PhotoSharingApp.Universal.Lifecycle;
using PhotoSharingApp.Universal.Models;
using PhotoSharingApp.Universal.Unity;
using PhotoSharingApp.Universal.ViewModels;
using Windows.ApplicationModel.Activation;
using Windows.ApplicationModel.DataTransfer;
using Windows.Globalization;
using Windows.Storage;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

namespace PhotoSharingApp.Universal
{
    /// <summary>
    /// Share target extensions for the app.
    /// </summary>
    public partial class App : Application
    {
        private Frame GetOrCreateRootFrame()
        {
            var rootFrame = Window.Current.Content as Frame;

            if (rootFrame == null)
            {
                rootFrame = new Frame();

                // Set the default language
                rootFrame.Language = ApplicationLanguages.Languages[0];

                rootFrame.NavigationFailed += OnNavigationFailed;

                // Place the frame in the current Window
                Window.Current.Content = rootFrame;
            }

            return rootFrame;
        }

        /// <summary>
        /// Invoked when the application is activated through sharing association.
        /// </summary>
        /// <param name="args">Event data for the event.</param>
        protected override async void OnShareTargetActivated(ShareTargetActivatedEventArgs args)
        {
            IAppEnvironment mainAppEnvironment = null;
            IUploadFinishedHandler mainUploadFinishedHandler = null;

            if (UnityBootstrapper.Container != null)
            {
                // We need to save the app environment from the current app.
                mainAppEnvironment = ServiceLocator.Current.GetInstance<IAppEnvironment>();
                mainUploadFinishedHandler = ServiceLocator.Current.GetInstance<IUploadFinishedHandler>();
            }
            else
            {
                // We only configure unity if the main app is not already launched.
                UnityBootstrapper.Init();
                UnityBootstrapper.ConfigureRegistries();
            }

            // Overwrite existing app environment instance.
            UnityBootstrapper.Container.RegisterInstance(typeof(IAppEnvironment), new AppEnvironment());

            // Do initializations, trying restoring current user into the
            // provided app environment.
            await AppInitialization.DoInitializations();

            // Overwrite existing upload finished handler to make sure, the app
            // does not navigate to the categories page after successful upload,
            // but closes the share target window instead.
            var uploadFinishedHandler =
                new ShareTargetUploadFinishedHandler(() =>
                {
                    // Restore original app environment.
                    if (mainAppEnvironment != null)
                    {
                        UnityBootstrapper.Container.RegisterInstance(typeof(IAppEnvironment), mainAppEnvironment);
                    }

                    // Restore original upload finished handler.
                    if (mainUploadFinishedHandler != null)
                    {
                        var uploadFinishedHandlerType = mainUploadFinishedHandler.GetType();
                        UnityBootstrapper.Container.RegisterType(typeof(IUploadFinishedHandler),
                            uploadFinishedHandlerType);
                    }

                    args.ShareOperation.ReportCompleted();
                });

            UnityBootstrapper.Container.RegisterInstance(typeof(IUploadFinishedHandler), uploadFinishedHandler);

            // Access data that has been shared.
            var data = args.ShareOperation.Data;

            if (data.Contains(StandardDataFormats.StorageItems))
            {
                try
                {
                    var items = await data.GetStorageItemsAsync();

                    // We expect the shared data to be a StorageFile.
                    var file = items.FirstOrDefault() as StorageFile;

                    if (file != null)
                    {
                        GetOrCreateRootFrame();

                        var navigationFacade = ServiceLocator.Current.GetInstance<INavigationFacade>();
                        navigationFacade.NavigateToCropView(file);

                        Window.Current.Activate();
                    }
                }
                catch (Exception)
                {
                    args.ShareOperation.ReportCompleted();
                }
            }
        }
    }
}