Parse a Bitcoin URL in CoffeeScript

parse-bitcoin-url.coffee

# Parse bitcoin URL query keys. 
parseBitcoinURL = (url) ->
  r = /^bitcoin:([a-zA-Z0-9]{27,34})(?:\?(.*))?$/
  match = r.exec(url)
  return null  unless match
  parsed = url: url
  if match[2]
    queries = match[2].split("&")
    i = 0

    while i < queries.length
      query = queries[i].split("=")
      parsed[query[0]] = decodeURIComponent(query[1].replace(/\+/g, "%20"))  if query.length is 2
      i++
  parsed.address = match[1]
  parsed