server.js

'use strict';

const express = require('express');
const cors = require('cors');
const execute = require('./sandbox').execute;
const { uuid } = require('uuidv4');
const {codeSchema} = require("./codeSchema");
const mongoose = require('mongoose');
// Constants
const PORT =  process.env.PORT || '5000';
const HOST = '0.0.0.0';

//App
const app = express();

// ***connection with DB ***
const mongoConnectionURL = "mongodb+srv://rishav:helloworld@cluster0-1zq8a.mongodb.net/code?retryWrites=true&w=majority";
// TODO change database name to the name you chose
const databaseName = "code"
mongoose
  .connect(mongoConnectionURL, {
    useNewUrlParser: true,
    useUnifiedTopology: true,
    dbName: databaseName,
  })
  .then(() =>{ console.log("Connected to MongoDB")})
  .catch((err) => console.log(`Error connecting to MongoDB: ${err}`));

//Middlewares
app.use(cors());
app.use(express.json()); // for parsing application/json
app.use(express.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded
app.use((req, res, next) => {  
  req.id = uuid();  //assign unique id to each request
  next();
});

//Routes
app.post('/dryRun', async(req, res) => {
  const {code,lang,vars} = req.body;
  res.send(await execute(code, lang, vars, req.id));
});

app.post('/runInFlow',async(req, res)=>{
   const {id, vars} = req.body;
   const result = await codeSchema.findOne({id:id})
   const {code, lang} = result;
   res.send(await execute(code, lang, vars, req.id));
});

app.post('/uploadCode', async(req, res)=>{
  const {id,lang, code, varObj }= req.body
  const result = await codeSchema.updateOne({id:id},{$set:{code:code,lang:lang,varObj:varObj}},{upsert:true})
  res.send(result)
})

app.get('/:id',,async(req,res)=>{
  const result = await codeSchema.findOne({id:req.params.id})
  res.send(result)
})

app.get('/',async(req,res)=>{
   console.log('get api to see all codes')
   const result = await codeSchema.find();
   res.send(result);
})

app.listen(PORT, HOST, () => {
  console.log(`Running at http://${HOST}:${PORT}`);
});