Payment for Messenger - Process Mobilemoney payments

process-mobilemoney-gh.js

/**
 * Process mobile money payments using Mazzuma API
 *
 */

'use strict';

const request = require('request');
const sendTextMessage = require('../actions/sendTextMsg');

const processMobilemoney = (senderID, orderObj, numberPrefix, network, route, pageObj) => {
  // Check if number prefix matches a Ghanaian telco
  if (!(['023', '024', '054', '055', '026', '056', '027', '057', '020', '050', '028'].includes(numberPrefix))) {
    sendTextMessage({
      recipientId: senderID,
      messageText:
        "Sorry, it seems you didn't enter a valid Ghanian mobile number. Please try again.",
      page_token: pageObj.page_token
    });
    return;
  }

  // Set originating network according to prefix
  if (numberPrefix === '024' || numberPrefix === '054' || numberPrefix === '055') {
    network = 'mtn';
  } else if (numberPrefix === '026' || numberPrefix === '056') {
    network = 'airtel';
  } else if (numberPrefix === '027' || numberPrefix === '057') {
    network = 'tigo';
  }

  // Handle non-supported telco
  if (!network) {
    return sendTextMessage({
      recipientId: senderID,
      messageText:
        'Apologies, we only support MTN, Airtel and Tigo mobile money payments for now. Sorry for the inconvenience.',
      page_token: pageObj.page_token
    });
  }

  // Set route option according to sending and receiving network
  switch (network) {
  case 'mtn':
    route = 'rmta';
    break;
  case 'tigo':
    route = 'rtta';
    break;
  case 'airtel':
    route = 'rata';
    break;
  }

  // Handle failure in setting route option
  if (!route) {
    return sendTextMessage({
      recipientId: senderID,
      messageText:
        'We think an error has occurred. Kindly contact support.',
      page_token: pageObj.page_token
    });
  }

  // Notify user to watch out for USSD prompt
  sendTextMessage({
    recipientId: senderID,
    messageText:
      'You will be prompted to accept the transaction and enter your mobile money pin via USSD. Please note that you might incur additional charge from your telco as transaction cost.',
    page_token: pageObj.page_token,
    callback: () => {
      sendTextMessage({
        recipientId: senderID,
        messageText:
          'Please note that you might incur additional charge from your telco as transaction cost.',
        page_token: pageObj.page_token
      });
    }
  });

  // Query Mazzuma mobile money API
  request({
    url: 'https://client.teamcyst.com/api_call.php',
    headers: { 'content-type': 'application/json' },
    method: 'POST',
    json: {
      'price': orderObj.orderTotal,
      'network': network,
      'recipient_number': pageObj.mm_number,
      'sender': orderObj.orderOwnerPhone,
      'option': route,
      'apikey': process.env.MAZZUMA_TOKEN
    }
  }, (error, response, body) => {
    if (error) { return console.log('Error processing mobile money ', error); }
    if (body && body.code === 1) {
      // Payment successful. Send appropriate notification to user
      sendTextMessage({
        recipientId: senderID,
        messageText: `Payment has been received for order #${orderObj.orderNumber}. Your order is on the way!`,
        page_token: pageObj.page_token
      });
    } else {
      console.log('payment error: ', error);

      // Payment failure. notify user accordingly
      return sendTextMessage({
        recipientId: senderID,
        messageText: `Oops! An error occured and payment has NOT been received for order #${orderObj.orderNumber}. Please try again or contact support!`,
        page_token: pageObj.page_token
      });
    }
  });
};

module.exports = processMobilemoney;