Chatbotから話しかける（プロアクティブメッセージの送信）

リスト1：MessagesController.cs

using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using System.Web.Http;
using Microsoft.Bot.Builder.Dialogs;
using Microsoft.Bot.Connector;
using Microsoft.Bot.Builder.FormFlow;
using Microsoft.Bot.Builder.Dialogs.Internals;
using Autofac;
using System.Linq;

namespace Chatbot201707
{
    [BotAuthentication]
    public class MessagesController : ApiController
    {
        /// <summary>
        /// POST: api/Messages
        /// Receive a message from a user and reply to it
        /// </summary>
        public async Task<HttpResponseMessage> Post([FromBody]Activity activity)
        {
            if (activity.Type == ActivityTypes.Message)
            {
                await Conversation.SendAsync(activity, () => new Dialogs.RootDialog());
            }
            else
            {
                await HandleSystemMessageAsync(activity);
            }

            var response = Request.CreateResponse(HttpStatusCode.OK);
            return response;
        }

        private async Task<Activity> HandleSystemMessageAsync(Activity message)
        {
            if (message.Type == ActivityTypes.DeleteUserData)
            {
                // Implement user deletion here
                // If we handle user deletion, return a real message
            }
            else if (message.Type == ActivityTypes.ConversationUpdate)
            {
                IConversationUpdateActivity update = message;
                using (var scope = DialogModule.BeginLifetimeScope(Conversation.Container, message))
                {
                    var client = scope.Resolve<IConnectorClient>();
                    if (update.MembersAdded.Any())
                    {
                        var reply = message.CreateReply();
                        foreach (var newMember in update.MembersAdded)
                        {
                            if (newMember.Id == message.Recipient.Id)
                            {
                                reply.Text = $@"いらっしゃいませ！ご注文を伺います。

(メニューをご覧になる場合は「メニュー」と入力してください。)";
                                await client.Conversations.ReplyToActivityAsync(reply);

                            }

                        }
                    }
                }
            }
            else if (message.Type == ActivityTypes.ContactRelationUpdate)
            {
                // Handle add/remove from contact lists
                // Activity.From + Activity.Action represent what happened
            }
            else if (message.Type == ActivityTypes.Typing)
            {
                // Handle knowing tha the user is typing
            }
            else if (message.Type == ActivityTypes.Ping)
            {
            }

            return null;
        }
    }
}

リスト2：メッセージ送信後の処理を追加（RootDialog.cs）

public Task StartAsync(IDialogContext context)
{
    //context.Wait(HelloMessage);
    context.Wait(MessageReceivedAsync);
    return Task.CompletedTask;
}

リスト3：RootDialog.csのMessageReceivedAsyncメソッド

private async Task MessageReceivedAsync(IDialogContext context, IAwaitable<IMessageActivity> result)
{
    var activity = await result;
    switch (activity.Type)
    {
        case ActivityTypes.Message:
            var message = activity as IMessageActivity;
            switch (activity.Text)
            {
                case "メニュー":
                    MenuMessage(context);
                    break;

                case "ID":
                    await context.PostAsync($@"
ChannelId : {message.ChannelId}

FromId : {message.From.Id}

RecipientId : {message.Recipient.Id}

ServiceUrl : {message.ServiceUrl}

ConversationId : {message.Conversation.Id}
");
                    context.Wait(MessageReceivedAsync);
                    break;

                default:
                    await context.Forward(new ChatDialog(), ChatResumeAfterDialog, message, CancellationToken.None);
                    break;
            }
            break;
    }
}

リスト4：Program.cs

using Microsoft.Bot.Connector;
using System;
using System.Collections.Generic;

namespace Chatbot201707_ProactiveMessager
{
    class Program
    {
        static void Main(string[] args)
        {
            var appId = "<Microsoft App ID>";
            var appPassword = "<Password>";

            //Emulator
            var fromId = "default - user";
            var recipientId = "95i2nkda1dd4";
            var serviceUrl = "http://localhost:64607";
            var conversationId = "g011b863i3j";

            //Facebook
            //var fromId = "1628934843893271";
            //var recipientId = "145452079480720";
            //var serviceUrl = "https://facebook.botframework.com";
            //var conversationId = "1628934843893271-145452079480720";

            //Skype
            //var fromId = "18Afm0cxtapI0G7r6uyqCtK3MDtt38YDR5O6_EHo6NVk";
            //var recipientId = "28:2595fdc3-27b1-4810-a040-efc3da267409";
            //var serviceUrl = "https://smba.trafficmanager.net/apis/";
            //var conversationId = "29:18Afm0cxtapI0G7r6uyqCtK3MDtt38YDR5O6_EHo6NVk";

            //WebChat
            //var fromId = "KEBORI0rmk6";
            //var recipientId = "Chatbot201707@dTuM__gWAS0";
            //var serviceUrl = "https://webchat.botframework.com/";
            //var conversationId = "fd8a04848c4744ddbbcce046f6086967";

            MicrosoftAppCredentials.TrustServiceUrl(serviceUrl);
            var connector = new ConnectorClient(new Uri(serviceUrl), appId, appPassword);
            var botAccount = new ChannelAccount(id: recipientId);
            var userAccount = new ChannelAccount(id: fromId);

            IMessageActivity message = Activity.CreateMessageActivity();
            message.Conversation = new ConversationAccount(id: conversationId);
            message.From = botAccount;
            message.Recipient = userAccount;
            message.Locale = "ja-jp";
            message.Text = $@"Chatbotからのお知らせです。

本日のおすすめは、季節のフルーツとれたてのあまーいいちごです。";
            var cardImage = new CardImage { Url = "https://chatbot201707.azurewebsites.net/img/strawberry.jpg" };
            var heroCard = new HeroCard { Title = "季節のフルーツ", Images = new List<CardImage> { cardImage }};
            message.Attachments.Add(heroCard.ToAttachment());
            connector.Conversations.SendToConversation((Activity)message);
        }
    }
}