Module: DMCourier::ServiceLocator

Included in:
DeliveryMethod
Defined in:
lib/dm_courier/service_locator.rb

Instance Method Summary collapse

Instance Method Details

#constantize(service_name) ⇒ Object 



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# File 'lib/dm_courier/service_locator.rb', line 17

def constantize(service_name)
  camel_cased_word = "DMCourier::Services::#{service_name.to_s.tr('_', ' ').split.map(&:capitalize).join('')}"
  names = camel_cased_word.split("::")

  Object.const_get(camel_cased_word) if names.empty?

  names.shift if names.size > 1 && names.first.empty?

  names.inject(Object) do |constant, name|
    if constant == Object
      constant.const_get(name)
    else
      candidate = constant.const_get(name)
      next candidate if constant.const_defined?(name, false)
      next candidate unless Object.const_defined?(name)

      constant = constant.ancestors.inject do |const, ancestor|
        break const    if ancestor == Object
        break ancestor if ancestor.const_defined?(name, false)
        const
      end

      constant.const_get(name, false)
    end
  end
end

#service ⇒ Object 



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# File 'lib/dm_courier/service_locator.rb', line 7

def service
  @service ||= begin
                 raise DMCourier::InvalidService unless @service_name

                 constantize(@service_name)
               end
rescue NameError => e
  raise DMCourier::InvalidService, e
end