Movies Interview Server

server.js

const _ = require('lodash')
const express = require('express')
const movies = require('./movies.json')
const actors = []
const roles = []

/**
 * Documentation
 *
 * Installation: npm install express lodash morgan
 * Starting: node server.js
 *
 * Routes:
 *   - /movies
 *   - /movies/<id>
 *   - /actors
 *   - /actors/<id>
 *   - /roles
 *
 * Query Examples
 *   - /movies?search=batman
 *   - /actors?search=christian
 *   - /roles?actorId=123
 *   - /roles?movieId=123
 */

function getOrCreateActor(actors, name) {
  const existing = actors.find((actor) => actor.name === name)
  if (existing) return existing
  const actor = {name, id: actors.length + 1}
  actors.push(actor)
  return actor
}

function init() {
  movies.forEach((movie, i) => {
    movie.id = i + 1

    movie.actors.forEach((name, i) => {
      const actorId = getOrCreateActor(actors, name).id
      roles.push({
        id: roles.length + 1,
        actorId,
        movieId: movie.id,
        role: i === 0 ? 'lead' : 'supporting',
      })
    })

    delete movie.actors
  })

  movies.sort((a, b) => new Date(b.releaseDate).getTime() - new Date(a.releaseDate).getTime())
}

const app = express()
app.use(require('morgan')('dev'))
app.get('/movies', (req, res) => {
  const offset = req.query.offset || 0
  let matched = movies
  if (req.query.search)
    matched = _.filter(matched, (m) =>
      m.name.toLowerCase().includes(req.query.search.toLowerCase()),
    )

  res.json(matched.slice(offset, offset + 10))
})
app.get('/movies/:id', (req, res) => {
  const movie = movies.find((m) => m.id === Number(req.params.id))
  if (!movie) return res.sendStatus(404)
  res.json(movie)
})

app.get('/actors', (req, res) => {
  const offset = req.query.offset || 0
  let matched = actors
  if (req.query.search)
    matched = _.filter(matched, (m) =>
      m.name.toLowerCase().includes(req.query.search.toLowerCase()),
    )

  res.json(matched.slice(offset, offset + 10))
})
app.get('/actors/:id', (req, res) => {
  const actor = actors.find((m) => m.id === Number(req.params.id))
  if (!actor) return res.sendStatus(404)
  res.json(actor)
})

app.get('/roles', (req, res) => {
  const offset = req.query.offset || 0
  let matched = roles
  if (req.query.actorId) matched = _.filter(matched, {actorId: Number(req.query.actorId)})
  if (req.query.movieId) matched = _.filter(matched, {movieId: Number(req.query.movieId)})
  res.json(matched.slice(offset, offset + 10))
})

init()
app.listen(8080, () => console.log('Listening on 8080...'))