bot-handoff/src/middleware/getTranscribeNonBotMessagesMiddleware.ts

Bot hand off module for the Microsoft Bot Framework. It allows you to transfer a customer from talking to a bot to talking to a human.

import * as Promise from 'bluebird';
import { Session } from 'botbuilder';
import { IHandoffMessage } from './../IHandoffMessage';
import { IProvider } from './../provider/IProvider';

export function getTranscribeNonBotMessagesMiddleware(provider: IProvider): (s: Session, n: Function) => void {
    return (session: Session, next: Function) => {
        const message = session.message as IHandoffMessage;
        let transcriptionPromise: Promise<{}> = Promise.resolve({});
        // TODO can probably safely remove this
        if (!message.customerAddress && !message.agentAddress) {
            throw new Error('TranscribeNonBotMessagesMiddleware must be applied after addAddressesForHandoffMessageMiddleware');
        }

        // event messages are not part of a transcript
        if (message.type === 'message') {
            if (message.agentAddress) {
                transcriptionPromise = provider.addAgentMessageToTranscript(message);
            } else {
                transcriptionPromise = provider.addCustomerMessageToTranscript(message);
            }
        }

        //tslint:disable
        transcriptionPromise.then(() => next());
        //tslint:enable
    };
}