index.js

const express = require('express');
const axios = require("axios");
const sf = require('node-salesforce');


const app = express();
app.use(express.json())

const port = process.env.PORT || 3000;

app.use(express.json())

app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
  next();
});


app.get('/', (req, res) => res.send('Server up and running!'));

app.post("/createticket", (async (req,res) => {
  
  const userId = req.body.user_id;
  if(!userId) return res.status(400).send("No user_id");

  const auth = await getSalesforceAccessToken();
  if(auth.error) return res.status(400).send("Salesforce no auth!");
    
  const salesforceCase = await createCase(auth.token);
  if (!salesforceCase.success) return res.status(400).send("Case not created!");

  const channelUrl = salesforceCase.id;
  const channel = await createChannel(channelUrl, userId);
  if(channel.error) return res.status(400).send("Channel not created!");

  res.status(200).send(channel.channel);

}));

const getSalesforceAccessToken = async function() {
  
    const url = ""https://YOUR_DOMAIN-dev-ed.my.salesforce.com""
    const conn = new sf.Connection({ loginUrl: url});
    try {
        await conn.login("SF_EMAIL","SF_PASSWORDSF_TOKEN");
        return { error: undefined, token: conn.accessToken };
    } catch (e){
        return { error: e, token: undefined }
    }
};

const createCase = async function (token) {

    const body = {
            "Subject": "Problem with dog",
            "Description": "I'm writing to complain about a problem I'm having with my dog. ",
            "SuppliedName": "Bob Smith",
            "SuppliedEmail": "bob@smith.com",
    };
    const headers = {
            "headers": {
            'Content-Type': 'application/json',
            'Authorization': 'Bearer ' + token
           }
    };
    const url = "https://YOUR_DOMAIN-dev-ed.my.salesforce.com/services/data/v39.0/sobjects/Case";
    try {
        const result = await axios.post(url, body, headers);
        return result.data;
    } catch (e) {
        return { id: undefined, success: false, errors: e };
    }
};

const createChannel = async function(channel_url, userId) {

    const data = { channel_url, user_ids: [userId]};
    const headers = {"headers": {
        "Api-Token": 'YOUR_SENDBIRD_API_TOKEN',
        "Content-Type": "text/plain"
    }
    }
    const url = `https://api-YOUR_SENDBIRD_APP_ID.sendbird.com/v3/group_channels`; 
    try {
        const channel = await axios.post(url, data, headers);
        return { success: true, channel: channel.data, error: undefined }
    } catch (e){
        return { success: false, channel: undefined, error: e }
    }
};



app.get("*", (req, res) =>{
  res.sendStatus(200);
});

app.listen(process.env.PORT || port, () => console.log(`Example app listening on port ${port}!`));