exchange gem NBKR external API

gistfile1.txt

module Exchange
  module ExternalAPI

    class Nbkr < XML

      API_URL = "http://nbkr.kg/XML/daily.xml"

      CURRENCIES = %W(kgs usd eur kzt rub).map(&:to_sym)

      def update opts={}
        time = helper.assure_time(opts[:at], default: :now)

        Call.new(api_url(time), at: time, format: :xml) do |result|
          @base = :kgs

          @rates = result.search('Currency').map do |c|
            [
              c.attr("ISOCode").downcase.to_sym,
              (1 / BigDecimal.new(c.at('Value').text.sub(',', '.')))
            ]
          end.to_h.merge({ kgs: 1 })

          @timestamp = Date.today.to_time.to_i
        end
      end

      private

        def api_url(time)
          API_URL
        end

    end
  end
end

Exchange.configuration = Exchange::Configuration.new do |c|
  c.api.subclass = :nbkr
end

1. Add 'gem exchange' in Gemfile
2. Run bundle
3. Add gist content to 'config/initializers/exchange.rb'
4. Check conversion 100.in(:kgs).to(:usd).to_f.round(2)

вместо
%W(kgs usd eur kzt rub).map(&:to_sym)
можно
%I(kgs usd eur kzt rub)
ps. after ruby 2.0

Поэтому так и написал, чтобы в 1.9.3 заработало :)

1.9.3 кетсин

Обернуто в гем https://github.com/sharshenov/exchange-nbkr