const fastify = require('fastify')

fastify.register(require('fastify-mongodb'), {
  url: 'mongodb://mongo/db'
})

fastify.get('/user/:id', (req, reply) => {
  const { db } = fastify.mongo
  db.collection('users', onCollection)

  function onCollection (err, col) {
    if (err) return reply.send(err)

    col.findOne({ id: req.params.id }, (err, user) => {
      reply.send(user)
    })
  }
})

fastify.listen(3000, err => {
  if (err) throw err
  console.log(`server listening on ${fastify.server.address().port}`)
})