gistfile1.coffee

superagent = require 'superagent'
async = require 'async'
_ = require 'underscore'
getCurrency = (currency, cb) ->
  path = 'http://currency-api.appspot.com' +
    '/api/USD/' + currency + '.json' +
    '?key=880ab1d06e0c4453208104d7a52e321dfba70748'
  agent = superagent.agent()
  agent.get(path).end (err, res) ->
    cb JSON.parse(res.text)

exports.index = (req, res) ->
  currencies = ['AUD', 'CAD', 'CHF', 'DKK', 'EUR']
  results = []
  async.each currencies, ((curr, cb) ->
    getCurrency curr, (data) ->
      results.push data
      cb()
    ), ->
      ret = {}
      _.each results, (r) -> ret[r.target] = r.rate
      res.send JSON.stringify(ret)