index.js

require('dotenv').config()
const experess = require('express')
const morgan = require('morgan')
const cors = require('cors')
const Person = require('./models/person')
const app  = experess()
app.use(experess.static('build'))
app.use(cors())
app.use(experess.json())
app.use(morgan(function (tokens, req, res) {
  return [
    tokens.method(req, res),
    tokens.url(req, res),
    tokens.status(req, res),
    tokens.res(req, res, 'content-length'), '-',
    tokens['response-time'](req, res), 'ms',
    JSON.stringify(req.body)
  ].join(' ')
}))

app.get('/api/persons', (req, res)=> {
  Person.find({}).then(persons => {
    res.json(persons.map(person => person.toJSON()))
  })
})

app.put('/api/persons/:id',(req,res,next) => {
  const getBody = req.body
  const newPerson = {
    name: getBody.name,
    number: getBody.number
  }
  Person.findByIdAndUpdate(req.params.id,newPerson).then(updatePerson=>{
    res.json(updatePerson.toJSON())
  }).catch(error => next(error))
})

app.delete('/api/persons/:id', (req,res,next)=> {
  Person.findByIdAndRemove(req.params.id)
    .then(result => {
      res.status(204).end()
    })
    .catch(error => next(error))
})

app.post('/api/persons', (req,res,next)=>{
  const getBody = req.body

  const newPerson = new Person ({
    name: getBody.name,
    number: getBody.number
  }) 

  newPerson.save().then(result=>{
    res.json(result.toJSON())
  }).catch(error => next(error))
})

app.get('/api/persons/:id', (req,res,next)=> {
  Person.findById(req.params.id).then(person=>{
    if(person){
      res.json(person.toJSON())
    }else{
      res.status(404).end()
    }
  }).catch(error => next(error))
})

const errorHandler = (error, request, response, next) => {

  if (error.name === 'CastError') {
    return response.status(400).send({ error: 'malformatted id' })
  } else if (error.name === 'ValidationError') {
    return response.status(400).json({ error: error.message })}

  next(error)
}
  
app.use(errorHandler)

const PORT = process.env.PORT

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