server.js

const express = require('express')
const bodyParser = require('body-parser')
const uuidv1 = require('uuid/v1');
const cors = require('cors')

const app = express()
const port = 3000

app.use(cors())

const jsonParser = bodyParser.json()

const messages = []

const users = []

function sendMessage(messageBody, login) {
  const message = {
    body: messageBody,
    sentBy: login
  }

  messages.push(message)
}

function loginUser(login){

  const user = {
    login,
    uuid: uuidv1()
  }
  users.push(user);
  return user;
}

app.post('/login', jsonParser, (req, res) => {
  const user = loginUser(req.body.login);
  console.log(user);
  users.push(user);
  return res.json(user);
})
app.post('/sendMessage', jsonParser, (req, res) => {
  const message = sendMessage(reg.body.message, reg.body.message)
})
app.get('/messages', (req, res) => {
  return res.json(messages)
})

app.get('/', (req, res) => res.send('Hello World!'))


app.listen(port, () => console.log(`Example app listening on port ${port}!`))