Module: Europe::Currency::ExchangeRates

Defined in:
lib/europe/currency/exchange_rates.rb

Overview

exchange rates

Constant Summary collapse

EXCHANGE_URL = 
'https://www.floatrates.com/daily/eur.json'

Class Method Summary collapse

Class Method Details

.extract_rates(doc) ⇒ Object 



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# File 'lib/europe/currency/exchange_rates.rb', line 19

def self.extract_rates(doc)
  data = JSON.parse(doc)

  rates = { date: Date.parse(data['usd']['date']),
            rates: {} }

  filter_rates(data, rates)
rescue JSON::ParserError
  :failed
end

.filter_rates(data, rates) ⇒ Object 



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# File 'lib/europe/currency/exchange_rates.rb', line 30

def self.filter_rates(data, rates)
  data.each do |currency, object|
    rates[:rates][currency.upcase.to_sym] = object['rate'].to_f
  end
  rates
end

.retrieve ⇒ Object 



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# File 'lib/europe/currency/exchange_rates.rb', line 14

def self.retrieve
  resp = Net::HTTP.get_response(URI.parse(EXCHANGE_URL))
  resp.code.to_i == 200 ? extract_rates(resp.body) : :failed
end