├── Procfile
├── README.md
├── .gitignore
├── .sample.env
├── vercel.json
├── package.json
└── app.js


/Procfile:
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1 | web: node app.js


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/README.md:
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1 | # WhatsAppChatBot


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/.gitignore:
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1 | node_modules
2 | .dccache
3 | .env
4 | package-lock.json


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/.sample.env:
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1 | VERIFY_TOKEN=sameple token for verification
2 | ACCESS_TOKEN= access token of your number generated from devlopers.facebook.com


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/vercel.json:
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 1 | {
 2 |     "builds": [
 3 |         {
 4 |             "src": "app.js",
 5 |             "use": "@vercel/node"
 6 |         }
 7 |     ],
 8 |     "routes": [
 9 |         {
10 |           "src": "/(.*)",
11 |           "dest": "app.js"
12 |         }
13 |     ]
14 |   }


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/package.json:
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 1 | {
 2 |   "name": "whatsapp",
 3 |   "version": "1.0.0",
 4 |   "description": "",
 5 |   "main": "index.js",
 6 |   "scripts": {
 7 |     "test": "echo \"Error: no test specified\" && exit 1",
 8 |     "start": "node app.js"
 9 |   },
10 |   "author": "",
11 |   "license": "ISC",
12 |   "dependencies": {
13 |     "axios": "^0.27.2",
14 |     "body-parser": "^1.20.0",
15 |     "dotenv": "^16.0.1",
16 |     "express": "^4.18.1",
17 |     "node-nlp": "^4.24.0"
18 |   }
19 | }
20 | 


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/app.js:
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 1 | // requirements: node.js, npm, express, body-parser, axios, dotenv
 2 | const express = require("express");
 3 | const body_parser = require("body-parser");
 4 | require("dotenv").config();
 5 | const app = express();
 6 | const axios = require("axios");
 7 | 
 8 | // set up the server
 9 | app.use(body_parser.json());
10 | 
11 | // home route
12 | app.get("/", (req, res) => {
13 |     res.status(200).send("Hello World");
14 | });
15 | 
16 | // webhook route get for verification
17 | app.get("/webhook", (req, res) => {
18 |     let mode = req.query["hub.mode"];
19 |     let challange = req.query["hub.challenge"];
20 |     let token = req.query["hub.verify_token"];
21 |     if (mode && token == process.env.VERIFY_TOKEN) {
22 |         res.status(200).send(challange);
23 |     } else {
24 |         res.sendStatus(403);
25 |     }
26 | });
27 | 
28 | // webhook route post for get messages
29 | app.post("/webhook", (req, res) => {
30 |     if (req.body.entry) {
31 |         // perameters from send messages
32 |         let phon_no_id = req.body.entry[0].changes[0].value.metadata.phone_number_id;
33 |         let from = req.body.entry[0].changes[0].value.messages[0].from;
34 |         let name = req.body.entry[0].changes[0].value.contacts[0].profile.name;
35 |         let msg_body = req.body.entry[0].changes[0].value.messages[0].text.body;
36 |         axios({
37 |             method: "POST",
38 |             url: `https://graph.facebook.com/v13.0/${phon_no_id}/messages?access_token=${process.env.ACCESS_TOKEN}`,
39 |             data: {
40 |                 messaging_product: "whatsapp",
41 |                 to: from,
42 |                 text: {
43 |                     body: `Hi.. ${name} \nI'm InducedBot Made for replying to your messages\nMade By: IshanSingla \nYou said: ${msg_body}`,
44 |                 },
45 |             },
46 |             headers: {
47 |                 "Content-Type": "application/json",
48 |             },
49 |         });
50 |         res.sendStatus(200);
51 |     } else {
52 |         res.sendStatus(404);
53 |     }
54 | });
55 | 
56 | // set up the server port
57 | app.listen(process.env.PORT || 3000, () => {
58 |     console.log("webhook is listening");
59 | });
60 | 


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