module Confidentiality
  module InstanceMethods
    def read_method_with_confidentiality(method, confidentiality_method, *args)
      real_value = send("#{method}_without_confidentiality", *args)
      
      if !Confidentiality.ignore? and send(confidentiality_method)
        confidential_return_value(real_value)
      else
        real_value
      end
    end
    
    def valid_with_confidentiality?
      Confidentiality.ignore do
        valid_without_confidentiality?
      end
    end
    
   private
    def confidential_return_value(real_value)
      case real_value
        when String
          Confidentiality.string
        when Array
          [Confidentiality.string]
        else
          nil
      end
    end
  end
end