module Ki
  module Restrictions
    def forbidden_actions
      []
    end

    def forbid *actions
      send :define_method, :forbidden_actions do
        actions
      end

      eigen_class = class << self; self; end
      eigen_class.send(:define_method, :forbidden_actions) do
        actions
      end
    end

    def required_attributes
      []
    end

    def requires *attributes
      send :define_method, :required_attributes do
        attributes
      end

      eigen_class = class << self; self; end
      eigen_class.send(:define_method, :required_attributes) do
        attributes
      end
    end

    def unique_attributes
      []
    end

    def unique *attributes
      send :define_method, :unique_attributes do
        attributes
      end

      eigen_class = class << self; self; end
      eigen_class.send(:define_method, :unique_attributes) do
        attributes
      end
    end
  end
end