server.js 2

server.js

const express = require('express');
const bodyParser = require('body-parser');
const cors = require('cors');
const readline = require('readline');
const childProcess = require('child_process');
const https = require('https');

const app = express();

if (process.argv.includes('--prompt')) {
  const rl = readline.createInterface(process.stdin, process.stdout);
  rl.question('Please specify port: ', (answer) => {
    if (isNaN(answer)) {
      console.warn(`Invalid port specified, using default instead.`);
      runServer(3000);
    } else {
      runServer(answer);
    }
  });
} else {
  runServer(3000);
}
app.use(cors());

const jsonParser = bodyParser.json();

const users = [];
const messages = [
  { body: 'test message', sentBy: 'test user' }
];

app.post('/login', jsonParser, (req, res) => {
  const user = {
    login: req.body.login
  }
  users.push(user);
  console.log(`User ${user.login} joined`);
  return res.json(user);
})

app.post('/sendMessage', jsonParser, (req, res) => {
  const message = {
    body: req.body.message,
    sentBy: req.body.login
  }
  messages.push(message);
  if (message.body === '/joke') {
    getJoke((err, joke) => {
      if (err) {
        console.error('Failed to fetch joke');
        res.json({ sentBy: 'Joke Bot', body: 'Failed :(' });
      } else {
        const jokeMessage = {
          body: joke,
          sentBy: 'Joke Bot'
        };
        messages.push(jokeMessage);
        res.json(jokeMessage);
      }
    })
  } else {
    return res.json(message);
  }
})

app.get('/messages', (req, res) => {
  return res.json(messages);
})

app.get('/', (req, res) => res.send("stary tekst"));

app.get('/whoami', (req, res) => {
  childProcess.exec('whoami', (err, response) => {
    if (err) {
      console.error(`whoami failed`);
      res.send(err.message);
    } else {
      res.send(response.trim());
    }
  });
});

function getJoke(callback) {
  https.get({
    hostname: 'icanhazdadjoke.com',
    headers: { Accept: 'text/plain' }
  }, (res) => {
    if (res.statusCode !== 200) {
      callback('no joke, sorry');
    } else {
      let joke = '';
      res.on('data', (chunk) => {
        joke += chunk;
      });
      res.on('end', () => {
        callback(null, joke);
      });
    }
  });
}

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