frankfurter/lib/api.rb

require 'sinatra'
require 'sinatra/jsonp'
require 'yajl'
require 'snapshot'

set :root, File.expand_path('..', File.dirname(__FILE__))

helpers do
  def snapshot
    quotes = Snapshot.new(params).quote

    if symbols = params.delete('symbols') || params.delete('currencies')
      symbols = symbols.split(',')
      quotes[:rates].keep_if { |k, _| symbols.include?(k) }
    end

    quotes
  end
end

get '/' do
  redirect 'http://fixer.io'
end

get '/latest' do
  jsonp snapshot
end

get %r{([\d-]+)} do |date|
  params[:date] = date
  jsonp snapshot
end