module Anonymizer
  def anonymize_attribute(attribute)
    self.send(:include, Module.new do
      define_method attribute do
        a = @attributes[attribute.to_s]
        a && attribute.to_s.ends_with?("_id") ? a.to_i : a
      end
      define_method "#{attribute}_with_anonymous" do
        send("#{attribute}_without_anonymous") unless anonymous?
      end
    end)
    alias_method_chain attribute, :anonymous
  end

  def anonymize_method(method, options = {})
    method_name, ending = split_method_name(method)
    self.send(:include, Module.new do
      if options[:superclass]
        define_method method do |*arguments|
          super(*arguments)
        end
      end
      define_method "#{method_name}_with_anonymous#{ending}" do |*arguments|
        send("#{method_name}_without_anonymous#{ending}", arguments) unless anonymous?
      end
    end)
    alias_method_chain method, :anonymous
  end

  private
  def split_method_name(method)
    if ['?', '!'].include?(method.to_s.last)
      [method.to_s[0..-2], method.to_s.last]
    else
      [method, nil]
    end
  end
end