index.js

const express = require('express')
const logfmt = require('logfmt')
const merge = require('merge')
const cors = require('cors')
const translate = require('wikipedia-translator')
const wikipedias = require('wikipedias')
const geojsonify = require('./lib/geojsonify')
const app = module.exports = express()

if (process.env.NODE_ENV !== 'test') app.use(logfmt.requestLogger())
app.use(express.static('public'))
app.set('view engine', 'jade')

app.get('/', cors(), function (req, res) {
  const locals = {
    wikipedias: wikipedias,
    hostname: req.hostname
  }

  // Support the old URL format
  if (req.query.query) {
    const url = require('url').format({
      pathname: '/search',
      query: req.query
    })
    return res.redirect(url)
  }

  res.render('index', locals)
})

app.get('/search', cors(), function (req, res) {
  const locals = {
    wikipedias: wikipedias,
    hostname: req.hostname
  }

  // Query param is required
  if (!req.query || !req.query.query) {
    return res.redirect('/')
  }

  // English is the default language
  req.query.lang || (req.query.lang = 'en')

  // Log it so we can watch the queries go by
  if (process.env.NODE_ENV !== 'test') { logfmt.log(req.query) }

  translate(req.query.query, req.query.lang, function (err, translation) {
    if (err) console.error(err)
    // "/search?query="+ t.word.toLowerCase() + "&lang=" + t.lang

    if (req.query.format && req.query.format === 'geojson') {
      res.json(geojsonify(translation.translations))
    } else if (req.query.format && req.query.format === 'json') {
      res.json(merge(locals, translation))
    } else {
      res.render('search', merge(locals, translation))
    }
  })
})

if (!module.parent) {
  const port = process.env.PORT || 5000
  app.listen(port, function () {
    console.log('App running on port %s', port)
  })
}