class EuroCurrencyConversionRate

Constants

API_URL

Public Class Methods

rate(currency) click to toggle source

returns the latest exchange rate in float for a currency w.r.t. EUR

Example:

>> EuroCurrencyConversionRate.rate(:usd)
=> 1.21
>> EuroCurrencyConversionRate.rate('USD')
=> 1.21

Arguments:

currency: (Symbol/String)

# File lib/euro_currency_conversion_rate.rb, line 19
def rate(currency)
  currency = currency.to_s.upcase
  return 1.0 if currency == 'EUR'
  currency_exchange_rate = currency_exchange_array.detect{ |ca| ca['currency'] == currency }
  currency_exchange_rate['rate'].to_f unless currency_exchange_rate.nil?
end

rates(currencies = []) click to toggle source

returns a hash containing the latest exchange rates for a list of currencies w.r.t EUR

Example:

>> EuroCurrencyConversionRate.rates([:usd, :chf, :inr])
=> {:usd=>1.0978, :chf=>1.0349, :inr=>69.7761}
>> EuroCurrencyConversionRate.rates
=> {:usd=>1.0978, :jpy=>133.39, :bgn=>1.9558, :czk=>27.372, :dkk=>7.4552, :gbp=>0.71, :huf=>307.71, :pln=>4.1075, :ron=>4.4539, :sek=>9.2425, :chf=>1.0349, :nok=>8.39, :hrk=>7.5383, :rub=>54.881, :try=>2.8665, :aud=>1.4023, :brl=>3.425, :cad=>1.3496, :cny=>6.8098, :hkd=>8.51, :idr=>14471.4, :ils=>4.269, :inr=>69.7761, :krw=>1204.41, :mxn=>16.7662, :myr=>3.9668, :nzd=>1.5025, :php=>48.958, :sgd=>1.4728, :thb=>36.882, :zar=>13.1034}

Arguments:

currencies: (Array)

# File lib/euro_currency_conversion_rate.rb, line 38
def rates(currencies = [])
  currencies = currencies.map{ |c| c.to_s.upcase }
  if currencies.empty?
    result_arr = currency_exchange_array
  else
    result_arr = currency_exchange_array.select{ |ca| currencies.include?(ca['currency']) }
  end
  result_hash = {}
  result_arr.map{ |ra| result_hash[ra['currency'].downcase.to_sym] = ra['rate'].to_f }
  result_hash[:eur] = 1.0 if currencies.include?('EUR')
  result_hash
end

Private Class Methods

currency_exchange_array() click to toggle source

# File lib/euro_currency_conversion_rate.rb, line 53
def currency_exchange_array
  xml = raw_xml_response
  xml.parsed_response['Envelope']['Cube']['Cube']['Cube']
end

raw_xml_response() click to toggle source

# File lib/euro_currency_conversion_rate.rb, line 58
def raw_xml_response
  xml = HTTParty.get(API_URL)
  if xml.response.code == '200'
    xml
  else
    fail("could not retrieve xml response. Got response code #{xml.response.code}")
  end
end