Payment for Messenger - Handle Bot Postbacks

handle-postbacks.js

/**
 * Handle postbacks received by bot server
 *
 */

'use strict';

// Assume you have these functions defined and exported in your project folder
const sendTextMessage = require('../actions/sendTextMsg');
const processMobilemoney = require('./process-mobilemoney-gh');

const receivedPostback = (event, pageObj) => {
  const senderID = event.sender.id;
  const payload = event.postback.payload;

  if (payload.split('_')[0] === 'pay') {
    // Get order details for processing
    const payData = payload.split('_');
    const payMethod = payData[1];
    const orderObj = {
      orderNumber: payData[2],
      orderTotal: payData[3],
      orderOwnerPhone: payData[4]
    };

    switch (payMethod) {
    case 'cashondelivery':
      sendTextMessage({
        recipientId: senderID,
        messageText: `You have choosen to pay Cash on Delivery of order #${orderObj.orderNumber}. Expect your delivery soon!`,
        page_token: pageObj.page_token
      });
      break;
    case 'mobilemoney':
      // Get number prefix, network and route for mobile money processing
      const numberPrefix = orderObj.orderOwnerPhone.slice(0, 3);
      const network = '';
      const route = '';
      processMobilemoney(senderID, orderObj, numberPrefix, network, route, pageObj);
      break;

      // You can add more cases for other payment method implementations here
    }
  }
};

module.exports = receivedPostback;