jellyBeanAPI.js

const express = require('express');
const app = express();

app.use(express.static('public'));

const PORT = process.env.PORT || 4001;

const jellybeanBag = {
  mystery: {
    number: 4
  },
  lemon: {
    number: 5
  },
  rootBeer: {
    number: 25
  },
  cherry: {
    number: 3
  },
  licorice: {
    number: 1
  }
};

// Logging Middleware
app.use((req, res, next) => {
  console.log(`${req.method} Request Received`);
  next('Bag with that name does not exist');
});

app.use('/beans/:beanName', (req, res, next) => {
  const beanName = req.params.beanName;
  if (!jellybeanBag[beanName]) {
    res.status(404).send('Bag with that name does not exist');
    return console.log('Response Sent');
  }
  req.bean = jellybeanBag[beanName];
  req.beanName = beanName;
  next();
});

app.get('/beans/', (req, res, next) => {
  res.send(jellybeanBag);
  console.log('Response Sent');
});

app.post('/beans/', (req, res, next) => {
  let bodyData = '';
  req.on('data', (data) => {
    bodyData += data;
  });

  req.on('end', () => {
    const body = JSON.parse(bodyData);
    const beanName = body.name;
    if (jellybeanBag[beanName] || jellybeanBag[beanName] === 0) {
      return res.status(404).send('Bag with that name already exists!');
    }
    const numberOfBeans = Number(body.number) || 0;
    jellybeanBag[beanName] = {
      number: numberOfBeans
    };
    res.send(jellybeanBag[beanName]);
    console.log('Response Sent');
  });
});

app.get('/beans/:beanName', (req, res, next) => {
  res.send(req.bean);
  console.log('Response Sent');
});

app.post('/beans/:beanName/add', (req, res, next) => {
  let bodyData = '';
  req.on('data', (data) => {
    bodyData += data;
  });

  req.on('end', () => {
    const numberOfBeans = Number(JSON.parse(bodyData).number) || 0;
    req.bean.number += numberOfBeans;
    res.send(req.bean);
    console.log('Response Sent');
  });
});

app.post('/beans/:beanName/remove', (req, res, next) => {
  let bodyData = '';
  req.on('data', (data) => {
    bodyData += data;
  });

  req.on('end', () => {
    const numberOfBeans = Number(JSON.parse(bodyData).number) || 0;
    if (req.bean.number < numberOfBeans) {
      return res.status(400).send('Not enough beans in the jar to remove!');
    }
    req.bean.number -= numberOfBeans;
    res.send(req.bean);
    console.log('Response Sent');
  });
});

app.delete('/beans/:beanName', (req, res, next) => {
  jellybeanBag[req.beanName] = null;
  res.status(204).send();
  console.log('Response Sent');
});

app.put('/beans/:beanName/name', (req, res, next) => {
  let bodyData = '';
  req.on('data', (data) => {
    bodyData += data;
  });

  req.on('end', () => {
    const newName = JSON.parse(bodyData).name;
    jellybeanBag[newName] = req.bean;
    jellybeanBag[req.beanName] = null;
    res.send(jellybeanBag[newName]);
    console.log('Response Sent');
  });
});

app.listen(PORT, () => {
  console.log(`Server is listening on port ${PORT}`);
});