Module: JSONVAT

Defined in:
lib/json_vat.rb,
lib/json_vat/period.rb,
lib/json_vat/country.rb,
lib/json_vat/file_cache_backend.rb

Defined Under Namespace

Classes: Country, FileCacheBackend, Period

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.cache_backend ⇒ Object 



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# File 'lib/json_vat.rb', line 15

def cache_backend
  @cache_backend ||= FileCacheBackend.new
end

.host ⇒ Object 



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# File 'lib/json_vat.rb', line 19

def host
  @host ||= 'http://jsonvat.com'
end

.perform_caching=(value) ⇒ Object (writeonly)

Sets the attribute perform_caching

Parameters:

  • value —

    the value to set the attribute perform_caching to.



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# File 'lib/json_vat.rb', line 24

def perform_caching=(value)
  @perform_caching = value
end

Class Method Details

.[](country) ⇒ Object 



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# File 'lib/json_vat.rb', line 73

def [](country)
  country(country)
end

.cache ⇒ Object 



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# File 'lib/json_vat.rb', line 31

def cache
  content = self.download
  self.cache_backend.write(content)
  content
end

.country(country) ⇒ Object 



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# File 'lib/json_vat.rb', line 63

def country(country)
  code = country.to_s.upcase

  # Fix ISO-3166-1-alpha2 exceptions
  if code == 'UK' then code = 'GB' end
  if code == 'EL' then code = 'GR' end

  self.rates.find { |r| r.country_code == code }
end

.download ⇒ Object 



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# File 'lib/json_vat.rb', line 27

def download
  Net::HTTP.get_response(URI.parse(self.host)).body
end

.load_rates ⇒ Object 



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# File 'lib/json_vat.rb', line 45

def load_rates
  JSON.parse(self.rates_through_cache)['rates'].map do |country|
    JSONVAT::Country.new(country)
  end
end

.perform_caching? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/json_vat.rb', line 11

def perform_caching?
  @perform_caching != false
end

.rates ⇒ Object 



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# File 'lib/json_vat.rb', line 55

def rates
  if reload_rates?
    @rates = load_rates
  else
    @rates
  end
end

.rates_through_cache ⇒ Object 



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# File 'lib/json_vat.rb', line 37

def rates_through_cache
  if self.perform_caching?
    self.cache_backend.read || self.cache
  else
    self.download
  end
end

.reload_rates? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/json_vat.rb', line 51

def reload_rates?
  !self.perform_caching? || (self.perform_caching? && self.cache_backend.invalid?)
end