sap chatbot integration node code

saprfc.js

/* importing packages */ 

var rfc = require('node-rfc'); 

var express = require('express'); 

var app = express(); 

var bodyParser = require('body-parser'); 

var cors = require('cors'); 

let Assistant = require('actions-on-google').DialogflowApp; 

var connParams = 
{ 
//give your SAP system credentials 

user: 'username', 

passwd: 'password', 

ashost: '---.--.--.--', 

sysnr: '00', 

client: '400',  

}; 

app.use(bodyParser.urlencoded({ 

extended: true 

})); 

/* to redirect the html page */ 

app.use(express.static(__dirname + "/public")); 

/* to parse the post body request */ 

app.use(bodyParser.json()); 

app.use(cors()); 

/*ACTION DECLARATION */ 

const purchase = "get.purchase.order"; 

/*PARAMETER DECLARATION */ 

const PLANT = "plant"; 

/* Connect SAP system */ 

var client = new rfc.Client(connParams, true); 

client.connect(function (err) { 

if (err) { 

return console.error('Server cannot be connected. Stay calm and try again', err); 

} 

/*Create a post request */ 

app.post('/rfqlist', function (req, res) { 

/*Dialogflow assistant */ 

const assistant = new Assistant({ request: req, response: res }); 

function replyIntent(assistant) { 

let plantID = assistant.getArgument(PLANT); 

/*Invoking the SAP BAPI by passing required parameters */ 

client.invoke('BAPI_REQUISITION_GETITEMS', { PLANT: plantID }, 

function (err, doc) { 

if (err) { 

return console.error('Error invoking RFC', err); 

} 

/*Return a response to the chatbot */ 

assistant.tell("The requisition number is " + doc["REQUISITION_ITEMS"][0].PREQ_NO + " "); 

}); 

} 

 
 

/* Mapping actions to respective logic */ 

let actionMap = new Map(); 

actionMap.set(purchase, replyIntent); 

assistant.handleRequest(actionMap); 

}); 

}); 

 

a/*Listening port */ 

app.listen(3001); 

console.log("Server running on port 3001");