Class: MoneyExchange::Store

Inherits:
Money::RatesStore::Memory
  • Object
show all
Defined in:
lib/money_exchange/store.rb

Constant Summary collapse

CACHE_KEY = 
'MoneyExchange::Store/cache'.freeze

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ Store

Returns a new instance of Store.



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# File 'lib/money_exchange/store.rb', line 7

def initialize(opts = {})
  super

  @client      = opts[:client]
  @cache_store = opts[:cache_store] || Cache::NullStore.new
  @ttl         = opts[:ttl] || 24 * 60 * 60
  @loaded_at   = nil
  @iso_base    = nil
end

Instance Method Details

#get_rate(iso_from, iso_to) ⇒ Object 



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# File 'lib/money_exchange/store.rb', line 17

def get_rate(iso_from, iso_to)
  load_rates! if stale?

  super || begin
    rate =
      if iso_from == @iso_base
        nil
      elsif inverse_rate = super(iso_to, iso_from)
        1.0 / inverse_rate
      elsif iso_to == @iso_base
        nil
      else
        get_rate(iso_from, @iso_base) * get_rate(@iso_base, iso_to)
      end

    add_rate(iso_from, iso_to, rate)
  end
end