index.js

require('dotenv').config()
const express = require('express')
const app = express()
const morgan = require('morgan')
const cors = require('cors')

const Person = require('./models/person')

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 === 'ValidationError') {
    return response.status(400).json({ error: error.message })
  }

  next(error)
}

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

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

let date = new Date()

app.get('/info', (req, res) => {
  Person.find({}).then(persons => {
    res.send(`<p>Phonebook has info for ${persons.length} people</p><p>${date}</p>`)
  })
})

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

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

  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 { name, number } = req.body

  Person.findByIdAndUpdate(
    req.params.id,
    { name, number },
    { new: true, runValidators: true, context: 'query' }
  )
    .then(updatedPerson => {
      res.json(updatedPerson)
    })
    .catch(error => next(error))
})

app.use(unknownEndpoint)
app.use(errorHandler)

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