C# NancyContext.Ensure方法代码示例

        static object GetRoom(
            NancyContext context,
            IDocumentSession documentSession,
            string slug)
        {
            context.Ensure("context");
            documentSession.Ensure("documentSession");

            if (string.IsNullOrEmpty(slug))
                return 404;

            if (!context.IsSignedUp())
                return 403;

            var room = documentSession.GetRoomBySlug(slug);
            if (room == null)
                return 404;

            var currentMember = context.GetCurrentMember(documentSession);
            Debug.Assert(currentMember != null, "`requireSignedUp()` should ensure a current member.");

            var posts = documentSession.GetPostsByRoom(room.Id).ToArray();

            return new RoomResponse(currentMember, room, posts);
        }

        public static object GetSignInPage(NancyContext context)
        {
            context.Ensure("context");

            var returnUrl = context.Request.Query["return-url"] ?? String.Empty;

            return new SignInPageResponse(HttpUtility.UrlEncode(returnUrl));
        }

        static object DeleteSession(NancyContext context)
        {
            context.Ensure("context");

            context.SetAlert("You successfully signed out.", type: AlertType.Success);

            context.SignOutOfTwitter();

            return context.Redirect(Paths.Home());
        }

        static object GetSignUpForm(
            NancyContext context, 
            IDocumentSession documentSession)
        {
            context.Ensure("context");
            documentSession.Ensure("documentSession");

            if (!context.IsSignedIn())
                return 403;

            var currentMember = context.GetCurrentMember(documentSession);

            if (currentMember != null)
                return 403;

            return new SignUpFormResponse();
        }

        public static object PostMember(
            NancyContext context,
            IDocumentSession documentSession,
            string alias, 
            string emailAddress)
        {
            context.Ensure("context");
            documentSession.Ensure("documentSession");

            if (!context.IsSignedIn())
                return 403;

            var errors = new List<string>();
            errors.AddRange(fn.ValidateRequired("Alias", alias));
            errors.AddRange(fn.ValidateLength("Alias", alias, 32));
            errors.AddRange(fn.ValidateFormat("Alias", alias, new Regex("[a-z][a-z0-9_-]+")));
            errors.AddRange(fn.ValidateRequired("Email Address", emailAddress));
            errors.AddRange(fn.ValidateLength("Email Address", emailAddress, 1024));

            var member = documentSession.GetMemberByAlias(alias);
            if (member != null)
                errors.Add(Strings.AliasNotAvailable(alias));

            if (errors.Count > 0)
                return context.ModelWithStatus(new SignUpFormResponse(alias, emailAddress, errors), 400);

            var authType = context.ReadSession<string>(Constants.AuthTypeSessionKey);
            var authId = context.ReadSession<string>(Constants.AuthIdSessionKey);

            if (String.IsNullOrEmpty(authType))
                throw new InvalidOperationException(Strings.AuthTypeMissing());

            if (String.IsNullOrEmpty(authId))
                throw new InvalidOperationException(Strings.AuthIdMissing());

            member = documentSession.CreateMember(authType, authId, alias, emailAddress);

            var returnUrl = context.GetReturnUrl();

            return context.Redirect(returnUrl ?? Paths.Member(member.Alias));
        }

        public static object GetAcceptInvitationForm(
            NancyContext context,
            IDocumentSession documentSession,
            string invitationCode)
        {
            context.Ensure("context");
            documentSession.Ensure("documentSession");

            if (!context.IsSignedUp())
                return 403;

            var playerInvitation = documentSession.GetPlayerInvitationByCode(invitationCode);
            if (playerInvitation == null || playerInvitation.Used)
                return 404;

            var room = documentSession.GetRoomById(playerInvitation.RoomId);
            if (room == null)
                return 404;

            return new AcceptInvitationFormResponse(room, invitationCode);
        }

        static object PostRoom(
            NancyContext context,
            IDocumentSession documentSession,
            string title,
            string slug,
            string description)
        {
            context.Ensure("context");
            documentSession.Ensure("documentSession");

            if (!context.IsSignedUp())
                return 403;

            var errors = new List<string>();
            errors.AddRange(fn.ValidateRequired("Title", title));
            errors.AddRange(fn.ValidateLength("Title", title, 128));
            errors.AddRange(fn.ValidateRequired("Slug", slug));
            errors.AddRange(fn.ValidateLength("Slug", slug, 128));
            errors.AddRange(fn.ValidateFormat("Slug", slug, new Regex("[a-z][a-z0-9_-]+")));
            if (description != null)
                errors.AddRange(fn.ValidateLength("Description", description, 1024));

            var existingRoom =documentSession.GetRoomBySlug(slug);
            if (existingRoom != null)
                errors.Add(Strings.NotAvailable("slug", slug));

            existingRoom = documentSession.GetRoomByTitle(title);
            if (existingRoom != null)
                errors.Add(Strings.NotAvailable("title", title));

            if (errors.Count > 0)
                return context.ModelWithStatus(new CreateRoomFormResponse(title, slug, description, errors), 400);

            var currentMember = context.GetCurrentMember(documentSession);
            Debug.Assert(currentMember != null, "`IsSignedUp` should ensure current member is not null.");

            var room = documentSession.CreateRoom(currentMember.Id, slug, title, description);

            return context.Redirect(Paths.Room(room.Slug));
        }

        static object PostPost(
            NancyContext context,
            IDocumentSession documentSession,
            IMailSender mailSender,
            string slug,
            string source)
        {
            context.Ensure("context");
            documentSession.Ensure("documentSession");

            if (String.IsNullOrEmpty(slug))
                return 404;

            if (!context.IsSignedUp())
                return 403;

            var room = documentSession.GetRoomBySlug(slug);
            if (room == null)
                return 404;

            if (String.IsNullOrEmpty(source))
                return 400;

            var currentMember = context.GetCurrentMember(documentSession);

            if (!room.CanPost(currentMember))
                return 403;

            var output = fn.HandlePost(documentSession, currentMember, room, source);

            if (output == null)
                output = new[] { InvalidPostHandlerOuput };

            if (output.Length > 0)
                return new SlashCommandOutputResponse(output);

            return 204;
        }

        static object GetInitiator(
            NancyContext context,
            IConfiguration configuration)
        {
            context.Ensure("context");
            configuration.Ensure("configuration");

            var returnUrl = context.Request.Query["return-url"].Value as string;
            if (!String.IsNullOrEmpty(returnUrl))
                context.SetReturnUrl(returnUrl);

            var callbackUri = fn.MakeAbsoluteUri(Paths.TwitterAuthReceiver());

            var oAuthRequest = OAuthRequest.ForRequestToken(
                configuration.TwitterAuthConsumerKey,
                configuration.TwitterAuthConsumerSecret,
                callbackUri.ToString());
            oAuthRequest.RequestUrl = Constants.TwitterAuth.RequestTokenUrl;

            var response = fn.SendGet(
                new Uri(oAuthRequest.RequestUrl),
                addHeader => addHeader("Authorization", oAuthRequest.GetAuthorizationHeader()));

            var @params = fn.ParseQueryString(response);

            var token = @params[Constants.TwitterAuth.OAuthTokenParamName];

            if (String.IsNullOrEmpty(token))
                throw new InvalidOperationException(Strings.OAuthTokenMissing());

            context.WriteSession(Constants.TwitterAuth.SessionKey, token);

            return context.Redirect(string.Format(
                CultureInfo.InvariantCulture,
                Constants.TwitterAuth.AuthenticatehUrlFormat,
                token));
        }

        public static object PostPlayer(
            NancyContext context,
            IDocumentSession documentSession,
            IMailSender mailSender,
            string roomSlug,
            string invitationCode,
            string characterName,
            string characterAvatarUrl)
        {
            context.Ensure("context");
            documentSession.Ensure("documentSession");
            mailSender.Ensure("mailSender");

            if (string.IsNullOrEmpty(roomSlug))
                return 404;

            if (!context.IsSignedUp())
                return 403;

            var room = documentSession.GetRoomBySlug(roomSlug);
            if (room == null)
                return 404;

            var currentMember = context.GetCurrentMember(documentSession);
            Debug.Assert(currentMember != null, "`requireSignedUp()` should ensure a current member.");

            var errors = new List<string>();

            errors.AddRange(fn.ValidateRequired("Invitation code", invitationCode));
            var playerInvitation = documentSession.GetPlayerInvitationByCode(invitationCode);
            if (playerInvitation == null)
                errors.Add("The invitation code is not valid.");

            if (playerInvitation != null && playerInvitation.Used)
                errors.Add("The invitation code has already been used.");

            errors.AddRange(fn.ValidateRequired("Character Name", characterName));
            errors.AddRange(fn.ValidateLength("Character Name", characterName, 64));
            errors.AddRange(fn.ValidateFormat("Character Name", characterName, new Regex("^[a-z][a-z0-9 .'-]+$", RegexOptions.IgnoreCase)));

            if (!string.IsNullOrEmpty(characterAvatarUrl))
                errors.AddRange(fn.ValidateUrl("Avatar URL", characterAvatarUrl));

            var existingPlayer = room.Players.FirstOrDefault(p => p.CharacterName.Equals(characterName, StringComparison.OrdinalIgnoreCase));
            if (existingPlayer != null)
                errors.Add(Strings.NotAvailable("character name", characterName));

            if (errors.Count > 0)
                return context.ModelWithStatus(new AcceptInvitationFormResponse(room, invitationCode, characterName, characterAvatarUrl, errors), 400);

            var player = new Player
            {
                CharacterAvatarUrl = characterAvatarUrl,
                CharacterName = characterName,
                MemberAlias = currentMember.Alias,
                MemberId = currentMember.Id,
                MemberEmailAddress = currentMember.EmailAddress,
                RoomId = room.Id
            };

            room.Players.Add(player);

            documentSession.UpdatePlayerInvitation(playerInvitation.Id, used: true);

            string text = Strings.Format("{0} joined the room as {1}.", player.MemberAlias, player.CharacterName);
            documentSession.CreatePost(mailSender, room.Id, currentMember.Id, null, null, "system", text);

            return context.Redirect(Paths.Room(room.Slug));
        }