index.js

require('dotenv').config()
const express = require('express')
const morgan = require('morgan')
const Person = require('./models/person')

const app = express()

morgan.token('body', function (req) {
  if (req.method === 'POST') {
    return JSON.stringify(req.body)
  }
})

app.use(express.json())
app.use(express.static('build'))
app.use(
  morgan(':method :url :status :res[content-length] - :response-time ms :body')
)

let persons = [
  {
    name: 'Arto Hellas',
    number: '12414',
    id: 1,
  },
  {
    name: 'Ada Lovelace',
    number: '39-44-5323523',
    id: 2,
  },
  {
    name: 'Dan Abramov',
    number: '12-43-234345',
    id: 3,
  },
  {
    name: 'Mary Poppendieck',
    number: '39-23-6423122',
    id: 4,
  },
]

app.get('/api/persons', (request, response) => {
  Person.find({}).then((people) => {
    response.json(people)
  })
})

app.get('/api/info', (request, response) => {
  Person.find({}).then((people) => {
    response.send(
      `<p>Phonebook has info for ${people.length} people</p>
        <p>${new Date().toString()},</p>`
    )
  })
})

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

app.delete('/api/persons/:id', (request, response, next) => {
  Person.findByIdAndRemove(request.params.id)
    .then((result) => { // eslint-disable-line no-unused-vars
      persons = persons.filter((person) => person.id !== request.params.id)
      response.status(204).end()
    })
    .catch((error) => next(error))
})

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

  if (!body.name || !body.number) {
    return response.status(400).json({
      error: 'name or number missing',
    })
  }

  const person = new Person({
    name: body.name,
    number: body.number,
  })

  person
    .save()
    .then((savedPerson) => savedPerson.toJSON())
    .then((savedAndFormattedPerson) => {
      response.json(savedAndFormattedPerson)
    })
    .catch((error) => next(error))
})

app.put('/api/persons/:id', (request, response, next) => {
  const body = request.body

  const person = {
    name: body.name,
    number: body.number,
  }

  Person.findByIdAndUpdate(request.params.id, person, { new: true })
    .then((updatedPerson) => {
      response.json(updatedPerson)
    })
    .catch((error) => next(error))
})

const errorHandler = (error, request, response, next) => {
  console.error(error.message)
  if (error.name === 'CastError') {
    return response.status(400).send({ error: 'malformatted id' })
  } else if (error.name === 'MongoError' && error.code === 11000) {
    return response.status(400).json({ error: error.message })
  }

  next(error)
}

// this has to be the last loaded middleware.
app.use(errorHandler)

const PORT = process.env.PORT || 3001 // eslint-disable-line no-undef
app.listen(PORT, '0.0.0.0', () => {
  console.log(`Server running on port ${PORT}`)
})