index.js

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

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

const app = express()

app.use(cors())

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

app.use(express.json())

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

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

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

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.get('/info', (request, response, next) => {
  const time = new Date()

  Person.count({}).then(count => {
    response.send(`<p>Phonebook has info for ${count} people</p><p>${time}</p>`)
  }).catch(error => next(error))
})

app.delete('/api/persons/:id', (request, response, next) => {
  Person.findByIdAndRemove(request.params.id).then(result => {
    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: 'Either name or number is missing or both'
    })
  }

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

  person.save().then(savedPerson => {
    response.json(savedPerson)
  }).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, runValidators: true, context: 'query' }).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 === 'ValidationError'){
    return response.status(400).send({ error: error.message })
  }

  next(error)
}

app.use(errorHandler)

const PORT = process.env.PORT

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