class GoogleCurrencyConvert

# File lib/google_currency_convert.rb, line 19
def self.currency_codes
        (@info ||= currency_info).map { |i| i.split(' ')[0] }
end

# File lib/google_currency_convert.rb, line 23
    def self.currency_convert(from, to, amount = 1)
            if not currency_codes.include?(from) or not currency_codes.include?(to)
                    return "Error: cannot support such currency code"
            end
            return "Error: amount must be a positive integer" if amount <= 0 or amount.class != Fixnum

params = {from: from, to: to, a: amount}
response = https_get(URL, params)
return "connect google finance failed" unless response.code == '200'

doc = Nokogiri::HTML(response.body)
result = doc.css('div#currency_converter_result').first.text
result.split(' ')[3].to_f
    end

# File lib/google_currency_convert.rb, line 10
def self.currency_info
        unless @info
                @info = []
                file_path = File.expand_path("curr_code.csv", File.dirname(__FILE__))
                IO.readlines(file_path).each { |line| @info << line.strip }
  end
  @info
end