inbound-wait-conference-action.js

import { twiml } from 'twilio';
import { fetchSettingByName } from '../../system-setting/system-setting-action';
import { validateTwilioSignature } from '../../../shared/twilio';
import { getBaseUrl } from '../../../shared/utils';
import * as qs from 'querystring';

/**
 * Waiting for a conference webhook handler.
 *
 * @param {object} event - The cloud function's event.
 * @param {object} ctx - The cloud function's context api.
 *
 * @returns {Promise} The request result.
 */
export default async function(event, ctx) {
  const { call } = event.pathParameters;
  try {
    const response = new twiml.VoiceResponse();
    const signature = event.headers['X-Twilio-Signature'];
    const url = `${getBaseUrl(ctx)}/webhook/inbound-wait-conference-action/${call}`;
    const body = qs.parse(event.body);
    let setting = null;

    console.log('call: inbound-wait-conference-action Body:', JSON.stringify(body, null, 2));

    if (validateTwilioSignature(signature, url, body) === false) {
      console.log(
        'call: inbound-wait-conference-action Invalid twilio signature [' + signature + ']',
      );

      return {
        headers: { 'Content-Type': 'application/json' },
        statusCode: 401,
        body: JSON.stringify({
          message: 'Unauthorized request',
        }),
      };
    }
    console.log('call: inbound-wait-conference-action Valid twilio signature');
    try {
      setting = await fetchSettingByName(ctx, 'CALL_WAIT_SOUND', { checkPermissions: false });
    } catch (e) {
      console.log('call: inbound-wait-conference-action Could not fetch waiting sound:', e.message);
    }

    if (setting) {
      console.log('call: inbound-wait-conference-action Playing waiting sound');
      response.play(
        {
          loop: 5,
        },
        setting.file.downloadUrl,
      );
    } else {
      console.log('call: inbound-wait-conference-action Playing default sound');
      /**
       * This is the defautl audio twilio plays
       * when entering a conference.
       */
      response.play(
        {
          loop: 1,
        },
        'http://com.twilio.music.classical.s3.amazonaws.com/BusyStrings.mp3',
      );
    }

    /*console.log('call: inbound-wait-conference-action Redirecting call');
    response.redirect(
      `${getBaseUrl(ctx)}/webhook/calls/inbound-drop/${call}/${body.ConferenceSid}`,
    );*/

    console.log('call: inbound-wait-conference-action Twiml:', response.toString());

    return {
      headers: {
        'Content-Type': 'text/xml',
      },
      statusCode: 200,
      body: response.toString(),
    };
  } catch (e) {
    console.log('call: inbound-wait-conference-action Error', e.message);

    // return {
    //   statusCode: 500,
    //   body: `Something happened: ${e.message}`,
    // };
    const response = new twiml.VoiceResponse();

    console.log('call: inbound-wait-conference-action Something happened:', e.message);
    response.say(`Something happened: ${e.message}`);
    return {
      statusCode: 200,
      body: response.toString(),
    };
  }
}