public async Task ReceiveAsync(AuthenticationTokenReceiveContext context)
        {
            var allowedOrigin = context.OwinContext.Get<string>("as:clientAllowedOrigin");
            context.OwinContext.Response.Headers.Add("Access-Control-Allow-Origin", new[] { allowedOrigin });

            string hashedTokenId = context.Token.GetHash();
            using(UnitOfWork uow = new UnitOfWork())
            {
                using (RefreshTokenRepository _repo = new RefreshTokenRepository(uow))
                {
                    var refreshToken = await _repo.FindRefreshToken(hashedTokenId);

                    if (refreshToken != null)
                    {
                        //Get protectedTicket from refreshToken class
                        context.DeserializeTicket(refreshToken.ProtectedTicket);
                        var result = await _repo.RemoveRefreshToken(hashedTokenId);
                    }
                }
            }
            
        }
        public async Task CreateAsync(AuthenticationTokenCreateContext context)
        {
            var clientid = context.Ticket.Properties.Dictionary["as:client_id"];

            if (string.IsNullOrEmpty(clientid))
            {
                return;
            }

            var refreshTokenId = Guid.NewGuid().ToString("n");

            using (UnitOfWork _uow = new UnitOfWork())
            {
                var refreshTokenLifeTime = context.OwinContext.Get<string>("as:clientRefreshTokenLifeTime");

                var token = new RefreshToken()
                {
                    Id = refreshTokenId.GetHash(),
                    ClientId = clientid,
                    Subject = context.Ticket.Identity.Name,
                    IssuedUtc = DateTime.UtcNow,
                    ExpiresUtc = DateTime.UtcNow.AddMinutes(Convert.ToDouble(refreshTokenLifeTime))
                };

                context.Ticket.Properties.IssuedUtc = token.IssuedUtc;
                context.Ticket.Properties.ExpiresUtc = token.ExpiresUtc;

                token.ProtectedTicket = context.SerializeTicket();

                using (RefreshTokenRepository _repo = new RefreshTokenRepository(_uow))
                {
                    _repo.AddRefreshToken(token);
                    await _uow.SaveAsync();
                }

                context.SetToken(refreshTokenId);

            }
        }
        // Pour plus d’informations sur le regroupement, rendez-vous sur http://go.microsoft.com/fwlink/?LinkId=301862
        public static void RegisterBundles(BundleCollection bundles)
        {
            bundles.Add(new ScriptBundle("~/bundles/jquery").Include(
                        "~/Scripts/jquery-{version}.js"));

            // Utilisez la version de développement de Modernizr pour développer et apprendre. Puis, lorsque vous êtes
            // prêt pour la production, utilisez l’outil de génération sur http://modernizr.com pour sélectionner uniquement les tests dont vous avez besoin.
            bundles.Add(new ScriptBundle("~/bundles/modernizr").Include(
                        "~/Scripts/modernizr-*"));

            bundles.Add(new ScriptBundle("~/bundles/bootstrap").Include(
                      "~/Scripts/bootstrap.js",
                      "~/Scripts/gridster-bootstrap.min.js",
                      "~/Scripts/respond.js"));

            bundles.Add(new ScriptBundle("~/bundles/tinymce").Include(
                      "~/Scripts/tinymce.min.js"
                      ));

            bundles.Add(new ScriptBundle("~/bundles/underscore").Include(
                      "~/Scripts/underscore-min.js"));

            bundles.Add(new ScriptBundle("~/bundles/angular").Include(
                      "~/Scripts/angular.min.js",
                      "~/Scripts/angular-animate.min.js",
                      "~/Scripts/angular-translate.min.js",
                      "~/Scripts/angular-sanitize.min.js",
                      "~/Scripts/angular-translate-loader-url.min.js",
                      "~/Scripts/angular-local-storage.min.js",
                      "~/Scripts/angular-resource.min.js",
                      "~/Scripts/angular-gridster.min.js",
                      "~/Scripts/angular-tinymce.js",
                      "~/Scripts/angular-gridster.min.js",
                      "~/Scripts/angular-touch.min.js",
                      "~/Scripts/angular-simple-logger.min.js",
                      "~/Scripts/angular-google-maps.min.js",
                      "~/Scripts/ui-bootstrap-tpls-0.14.3.min.js",
                      "~/Scripts/angular-route.min.js",
                      "~/Scripts/ng-file-upload.min.js",
                      "~/Scripts/select-ui.min.js",
                      "~/Scripts/angular-navbar.js",
                      "~/Scripts/angular-dynamic-locale.min.js",
                      "~/Scripts/moment.min.js",
                      "~/Scripts/bootstrap-colorpicker-module.min.js"));

            bundles.Add(new ScriptBundle("~/bundles/scripts").Include(
                      "~/Scripts/app/modules/app.settings.js",
                      "~/Scripts/app/modules/App.js",
                      "~/Scripts/app/modules/app.menu.js",
                      "~/Scripts/app/modules/app.dashboard.js",
                      "~/Scripts/app/modules/app.image.picker.js",
                      "~/Scripts/app/modules/app.spinner.js",
                      "~/Scripts/app/directives/TopMenu.js",
                      "~/Scripts/app/directives/ewDashboard.js",
                      "~/Scripts/app/directives/ewStaticDashboard.js",
                      "~/Scripts/app/directives/ewImagePicker.js",
                      "~/Scripts/app/directives/ModuleUrl.js",
                      "~/Scripts/app/directives/dynamic.js",
                      "~/Scripts/app/directives/ewNewsPage.js",
                      "~/Scripts/app/directives/ewSingleNewsPage.js",
                      "~/Scripts/app/directives/ewFooter.js",
                      "~/Scripts/app/directives/ewModuleNews.js",
                      "~/Scripts/app/directives/ewTextfield.js",
                      "~/Scripts/app/directives/Spinner.js",
                      "~/Scripts/app/controllers/HomePage.js",
                      "~/Scripts/app/controllers/LoginPage.js",
                      "~/Scripts/app/controllers/AdminPage.js",
                      "~/Scripts/app/controllers/TopMenu.js",
                      "~/Scripts/app/controllers/ContentController.js",
                      "~/Scripts/app/controllers/AdminContentController.js",
                      "~/Scripts/app/controllers/ModalInstanceController.js",
                      "~/Scripts/app/controllers/AdminModuleController.js",
                      "~/Scripts/app/controllers/ModalContentTextController.js",
                      "~/Scripts/app/controllers/ModalContentTitleController.js",
                      "~/Scripts/app/controllers/ModalContentCardController.js",
                      "~/Scripts/app/controllers/ModalContentWidgetController.js",
                      "~/Scripts/app/controllers/ModalContentCarouselController.js",
                      "~/Scripts/app/controllers/ModalContentMapController.js",
                      "~/Scripts/app/controllers/ModalContentImageController.js",
                      "~/Scripts/app/controllers/ModalContentModuleController.js",
                      "~/Scripts/app/controllers/ImagePickerController.js",
                      "~/Scripts/app/controllers/NewsPageController.js",
                      "~/Scripts/app/controllers/SingleNewsPageController.js",
                      "~/Scripts/app/controllers/ModuleNewsController.js",
                      "~/Scripts/app/controllers/SpinnerController.js",
                      "~/Scripts/app/controllers/FooterController.js",
                      "~/Scripts/app/controllers/TextfieldController.js",
                      "~/Scripts/app/controllers/ErrorController.js",
                      "~/Scripts/app/filters/newsDate.js",
                      "~/Scripts/app/services/AuthService.js",
                      "~/Scripts/app/services/RoutingHelper.js",
                      "~/Scripts/app/services/TopMenuHelper.js",
                      "~/Scripts/app/services/ModuleHelper.js",
                      "~/Scripts/app/services/ModuleContentHelper.js",
                      "~/Scripts/app/services/ModuleTypeHelper.js",
                      "~/Scripts/app/services/ModuleContentTypeHelper.js",
                      "~/Scripts/app/services/ModuleUrlHelper.js",
                      "~/Scripts/app/services/WebsiteFileHelper.js",
                      "~/Scripts/app/services/ImagePickerHelper.js",
                      "~/Scripts/app/services/NewsHelper.js",
                      "~/Scripts/app/services/UserHelper.js",
                      "~/Scripts/app/services/LanguageHelper.js",
                      "~/Scripts/app/services/SettingsHelper.js",
                      "~/Scripts/app/services/PermissionHelper.js",
                      "~/Scripts/app/services/NavbarHelper.js",
                      "~/Scripts/app/services/SpinnerHelper.js",
                      "~/Scripts/app/services/ErrorEmailHelper.js",
                      "~/Scripts/app/services/AuthInterceptorService.js"));

            bundles.Add(new StyleBundle("~/Content/css").Include(
                      "~/Content/bootstrap.min.css",
                      "~/Content/spinner.css",
                      "~/Content/angular-gridster.min.css",
                      "~/Content/content.min.css",
                      "~/Content/colorpicker.css",
                      "~/Content/select-ui.min.css",
                      "~/Content/select2.css",
                      "~/Content/angular-navbar.css",
                      "~/Content/wfmi-style.css",
                      "~/Content/site.css"));

            UnitOfWork UnitOfWork = new UnitOfWork();
            using(SiteSettingsRepository _repo = new SiteSettingsRepository(UnitOfWork))
            {
                var cssTheme = _repo.All.FirstOrDefault(s => s.Key == "theme");
                if(cssTheme != null)
                {
                    bundles.Add(new StyleBundle("~/Content/theme").Include(
                        string.Format("~/Content/{0}.css", cssTheme.Value)
                    ));
                }
            }
        }
        public override Task ValidateClientAuthentication(OAuthValidateClientAuthenticationContext context)
        {
            string clientId = string.Empty;
            string clientSecret = string.Empty;
            Client client = null;

            if (!context.TryGetBasicCredentials(out clientId, out clientSecret))
            {
                context.TryGetFormCredentials(out clientId, out clientSecret);
            }

            if (context.ClientId == null)
            {
                //Remove the comments from the below line context.SetError, and invalidate context 
                //if you want to force sending clientId/secrects once obtain access tokens. 
                context.Validated();
                //context.SetError("invalid_clientId", "ClientId should be sent.");
                return Task.FromResult<object>(null);
            }
            using(UnitOfWork uow = new UnitOfWork())
            {
                using (ClientRepository _repo = new ClientRepository(uow))
                {
                    client = _repo.Find(context.ClientId);
                }
            }

            if (client == null)
            {
                context.SetError("invalid_clientId", string.Format("Client '{0}' is not registered in the system.", context.ClientId));
                return Task.FromResult<object>(null);
            }

            if (client.ApplicationType == ApplicationTypes.NativeConfidential)
            {
                if (string.IsNullOrWhiteSpace(clientSecret))
                {
                    context.SetError("invalid_clientId", "Client secret should be sent.");
                    return Task.FromResult<object>(null);
                }
                else
                {
                    if (client.Secret != clientSecret.GetHash())
                    {
                        context.SetError("invalid_clientId", "Client secret is invalid.");
                        return Task.FromResult<object>(null);
                    }
                }
            }

            if (!client.Active)
            {
                context.SetError("invalid_clientId", "Client is inactive.");
                return Task.FromResult<object>(null);
            }

            context.OwinContext.Set<string>("as:clientAllowedOrigin", client.AllowedOrigin);
            context.OwinContext.Set<string>("as:clientRefreshTokenLifeTime", client.RefreshTokenLifeTime.ToString());

            context.Validated();
            return Task.FromResult<object>(null);
        }