index.js

require('dotenv').config()
const express = require('express')
const morgan = require('morgan')
const app = express()
const cors = require('cors')
const Contact = require('./models/contact')

morgan.token('reqbody', request => {
  return JSON.stringify(request.body)
})

app.use(express.static('dist'))

const errorHandler = (error, request, response, next) => {
  console.log('----------------------------------')
  console.error('ERROR', error.message)
  console.log('----------------------------------')

  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(cors())
app.use(express.json())
app.use(morgan(':method :url :status :response-time ms :reqbody'))

const unknownEndpoint = (request, response) => {
  response.status(404).send({ error: 'unknown endpoint' })
}

//Get the info page
app.get('/info', (request, response) => {
  //Initialize persons variable
  let persons
  //Initialize date variable
  const date = new Date()
  Contact.find({})
    .then(contacts => {
      //Set persons variable to have the length of contacts array
      persons = String(contacts.length)
      //Respond with data to display on the info page
      response.send(`The phonebook contains ${persons} contacts.<br>
        Date: ${date.toLocaleDateString()}<br>
        Time: ${date.getHours()}:${date.getMinutes()}`)
    })
})

//Get full list of contacts in the phonebook
app.get('/api/persons', (request, response, next) => {
  Contact.find({})
    .then(contacts => {
      response.json(contacts)
    })
    .catch(error => next(error))
})

//Get contact by ID
app.get('/api/persons/:id', (request, response, next) => {
  Contact.findById(request.params.id)
    .then(person => {
      if (person) {
        response.json(person)
      } else {
        response.status(404).end()
      }
    })
    .catch(error => next(error))
})

//Delete contact by ID
app.delete('/api/persons/:id', (request, response, next) => {
  Contact.findByIdAndDelete(request.params.id)
    .then(() => {
      response.status(204).end()
    })
    .catch(error => next(error))
})

//Create new contact
app.post('/api/persons', (request, response, next) => {
  const body = request.body

  const contact = new Contact({
    name: body.name,
    number: body.number,
  })

  contact.save()
    .then(savedContact => {
      response.json(savedContact)
    })
    .catch(error => next(error))
})

//Replace existing contact
app.put('/api/persons/:id', (request, response, next) => {
  const { name, number } = request.body

  Contact.findByIdAndUpdate(
    request.params.id,
    { name, number },
    { new: true, runValidators: true, context: 'query' })
    .then(updatedContact => {
      response.json(updatedContact)
    })
    .catch(error => next(error))
})

//Use error handlers
app.use(errorHandler)
app.use(unknownEndpoint)

//Add port listener
const PORT = process.env.PORT
app.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`)
})