module MultiCurrency::Converter::Openexchange

Public Class Methods

get_rate_and_cache(source_currency, to_currency, date) click to toggle source
# File lib/converter/openexchange.rb, line 5
def self.get_rate_and_cache(source_currency, to_currency, date)
  app_id = ENV['OPEN_EXCHANGE_RATES_APP_ID'] || '6ecb58dda5bb46a2b4fc6bcfbffc8c91'
  if source_currency.downcase == to_currency.downcase
    rate = 1.0
  else
    exchange_rate = ExchangeRate.find_by_from_code_and_to_code_and_date(source_currency.downcase, to_currency.downcase, date)
    rate = if exchange_rate.present?
      exchange_rate.rate
    else
      response = Net::HTTP.get_response(URI("https://openexchangerates.org/api/historical/#{(date - 1).strftime("%Y-%m-%d")}.json?app_id=#{app_id}&base=#{source_currency.upcase}"))
      if response.is_a? Net::HTTPOK
        data = JSON.parse(response.body)
        rate_to = data["rates"]["#{to_currency.upcase}"]
        ExchangeRate.create!(from_code: source_currency, to_code: to_currency, date: date, rate: rate_to.to_f)
        rate_to.to_f
      else
        raise "#{response.code}: #{response.body}"
      end
    end
  end
  rate
end