index.js

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

app.use(cors())
app.use(express.json())
app.use(express.static('build'))

morgan.token('body', (req) => JSON.stringify(req.body))
app.use(morgan(':method :url :status :res[content-length] - :response-time ms :body'))

app.get('/info', (req, res, next) => {
  Person.find({}).then(persons => {
    const numberPersons = persons.length
    res.send(`<p>Phonebook has info for ${numberPersons} people</p><p> ${new Date()}</p>`)
  })
    .catch(error => next(error))
})

app.get('/api/persons', (req, res, next) => {
  Person.find({}).then(persons => {
    res.json(persons)
  })
    .catch(error => next(error))
})

app.get('/api/persons/:id', (req, res, next) => {
  Person.findById(req.params.id).then(person => {
    res.json(person)
  })
    .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 body = req.body

  if (body.name === undefined) {
    return res.status(400).json({
      error: 'name missing'
    })
  }
  if (body.number === undefined) {
    return res.status(400).json({
      error: 'number missing'
    })
  }

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

  person.save().then(savedPerson => {
    res.json(savedPerson)
  })
    .catch(error => next(error))
})

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

  const person = {
    number: body.number,
  }

  Person.findByIdAndUpdate(req.params.id, person, { new: true, runValidators: true })
    .then(updatedPerson => {
      res.json(updatedPerson.toJSON())
    })
    .catch(error => next(error))
})

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

app.use(unknownEndpoint)

const errorHandler = (error, req, res, next) => {
  console.error(error.message)

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

  next(error)
}

app.use(errorHandler)

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