Building-WhatsApp-chatbot-using-Nodejs

Imagine we’ve a company called “TowardsMachineLearning.Org”. Now this company wishes to use WhatsApp Bot to generate invoices for its client. WhatsApp Bot should also be able to send these invoices to respective clients. Click on below image to play the demo video on YouTube.

In this project, we'll implement a WhatsApp chatbot to generate invoices and send them to respective clients with right details.

Instructions for Installation

Please install following dependencies before procedding further in the project. Dependencies:

• aws-param-store: 2.0.0
• aws-sdk: 2.302.0
• fs:0.0.1-security
• nodemailer: 6.4.2
• pdfkit: 0.11.0"

Directory Structure

• invoiceBot : This directory is the main directory. Inside this you'll find following sub-directories-
• invoiceBot/pdf/index.js: to handle user's input and process it as per the desired format of the invoice.
• invoiceBot/pdf/getCreds.js: to get credentials stores on aws cloud.
• invoiceBot/pdf/createInvoice.js: to create pdf file and send this file to recipients.
• invoiceBot/serverless.yml: configuration file for aws setup.

Steps involved:

• Step 1. Creating an agent on Dialogflow.
• Step 2. Building whatsapp Sandbox on Twilio.
• Step 3. Twilio and Google's DialogFlow integration.
• Step 4. Reconfigure Welcome and Fall back Intent.
• Step 5. AWS Setup.
• Step 6 .The Serverless framework CLI.
• Step 7.Securely storing secrets.
• Step 8. Handle user’s input.
• Step 9. Create invoice.
• Step 10. Deploy your code on AWS's lambda service.

Youtube Tutorial:

You can checkout below video, where I'v demonstrated final output of this project. Please give it a thumbs up, if you like the project. https://www.youtube.com/watch?v=R120pjX3RJ4

Article published on TowardsMachineLearning.Org:

I've published a comprehensive article on implementation of WhatsApp chatbot using NodeJs on my website. Please follow below links to get more details.

• https://towardsmachinelearning.org/chatbot-part1/
• https://towardsmachinelearning.org/chatbot-part2/
• https://towardsmachinelearning.org/chatbot-part4/
• https://towardsmachinelearning.org/chatbot-part2/

Important learnings from implementation of WhatsApp-chatbot-using-Nodejs

• How to use WhatsApp for Business API.
• How to use Google's DialogFlow service to implement chatbot.
• How to setup WhatSapp sandbox on Twilio.
• How to handles users' inputs and send appropriate responses.

License:

This project is open-source and distributed under the MIT License. Feel free to use and modify the code as needed.

Issues:

If you encounter any issues or have suggestions for improvement, please open an issue in the Issues section of this repository.

Contact:

The code has been tested on Windows system. It should work well on other distributions but has not yet been tested. In case of any issue with installation or otherwise, please contact me onLinkedin

About Me:

I’m a seasoned Data Scientist and founder of TowardsMachineLearning.Org. I've worked on various Machine Learning, NLP, and cutting-edge deep learning frameworks to solve numerous business problems.