first-try-software/manufacturable

require 'manufacturable/registrar'

module Manufacturable
  module Item
    def new(*args, **kwargs, &block)
      key = kwargs.delete(:manufacturable_item_key)
      instance = kwargs.empty? ? super(*args, &block) : super
      instance.instance_variable_set(:@manufacturable_item_key, key)
      instance
    end

    def corresponds_to(key, type = self.superclass)
      key = key == type ? Registrar::ALL_KEY : key
      Registrar.register(type, key, self)
    end

    def corresponds_to_all(type = self.superclass)
      corresponds_to(Registrar::ALL_KEY, type)
    end

    def default_manufacturable(type = self.superclass)
      corresponds_to(Registrar::DEFAULT_KEY, type)
    end

    def self.extended(base)
      base.include(InstanceMethods)
    end

    module InstanceMethods
      attr_reader :manufacturable_item_key
    end
  end
end