botkit/src/teamsHelpers.ts

/**
 * @module botkit
 */
/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
import { BotkitMessage } from './core';
import { BotWorker } from './botworker';
import { TeamsInfo, MiddlewareSet, TurnContext } from 'botbuilder';

/**
 * This is a specialized version of [Botkit's core BotWorker class](core.md#BotWorker) that includes additional methods for interacting with Microsoft Teams.
 * It includes all functionality from the base class, as well as the extension methods below.
 * This BotWorker is used with the built-in Bot Framework adapter.
 * @noInheritDoc
 */
export class TeamsBotWorker extends BotWorker {
  /**
   * Grants access to the TeamsInfo helper class
   * See: https://docs.microsoft.com/en-us/javascript/api/botbuilder/teamsinfo?view=botbuilder-ts-latest
   */
  public teams: TeamsInfo = TeamsInfo;

  /**
   * Reply to a Teams task module task/fetch or task/submit with a task module response.
   * See https://docs.microsoft.com/en-us/microsoftteams/platform/task-modules-and-cards/task-modules/task-modules-bots
   * @param message
   * @param taskInfo an object in the form {type, value}
   */
  public async replyWithTaskInfo(message: BotkitMessage, taskInfo: any): Promise<any> {
      if (!taskInfo || taskInfo === {}) {
      // send a null response back
          taskInfo = {
              type: 'message',
              value: ''
          };
      }
      return new Promise((resolve, reject) => {
          this.controller.middleware.send.run(this, taskInfo, async (err, bot, taskInfo) => {
              if (err) {
                  return reject(err);
              }
              resolve(await this.getConfig('context').sendActivity({
                  type: 'invokeResponse',
                  value: {
                      status: 200,
                      body: {
                          task: taskInfo
                      }
                  }
              }));
          });
      });
  }
}

/**
 * When used, causes Botkit to emit special events for teams "invokes"
 * Based on https://github.com/microsoft/botbuilder-js/blob/master/libraries/botbuilder/src/teamsActivityHandler.ts
 * This allows Botkit bots to respond directly to task/fetch or task/submit events, as an example.
 * To use this, bind it to the adapter before creating the Botkit controller:
 * ```javascript
 * const Botkit = new Botkit({...});
 * botkit.adapter.use(new TeamsInvokeMiddleware());
 *
 * // can bind directly to task/fetch, task/submit and other invoke types used by teams
 * controller.on('task/fetch', async(bot, message) => {
 *    await bot.replyWithTaskInfo(message, taskInfo);
 * });
 * ```
 */
export class TeamsInvokeMiddleware extends MiddlewareSet {
    /**
     * Not for direct use - implements the MiddlewareSet's required onTurn function used to process the event
     * @param context
     * @param next
     */
    public async onTurn(context: TurnContext, next: () => Promise<any>): Promise<void> {
        if (context.activity.type === 'invoke') {
            if (!context.activity.name && context.activity.channelId === 'msteams') {
                context.activity.channelData.botkitEventType = 'cardAction';
            } else {
                switch (context.activity.name) {
                case 'fileConsent/invoke':
                case 'actionableMessage/executeAction':
                case 'composeExtension/queryLink':
                case 'composeExtension/query':
                case 'composeExtension/selectItem':
                case 'composeExtension/submitAction':
                case 'composeExtension/fetchTask':
                case 'composeExtension/querySettingUrl':
                case 'composeExtension/setting':
                case 'composeExtension/onCardButtonClicked':
                case 'task/fetch':
                case 'task/submit':
                    context.activity.channelData.botkitEventType = context.activity.name;
                    break;
                }
            }
        }
        await next();
    }
}