TuftsUniversity/whowas

module Whowas
  # This is just a simple way to allow gem users to define their own variables
  # on whatever this module extends -- mainly the Whowas module itself.
  #
  # see the following article:
  # https://www.viget.com/articles/easy-gem-configuration-variables-with-defaults
  module Configuration
    def configuration
      yield self
    end
    
    def define_setting(name, default = nil)
      class_variable_set("@@#{name}", default)
      
      define_class_method "#{name}=" do |value|
        class_variable_set("@@#{name}", value)
      end
      
      define_class_method name do
        class_variable_get("@@#{name}")
      end
    end
    
    private
    
    def define_class_method(name, &block)
      (class << self; self; end).instance_eval do
        define_method name, &block
      end
    end
  end
end