module FlydataCore

module OptionValidator
  def self.included(base)
    base.extend(ClassMethods)
  end

  def validate_options(o, options = nil)
    self.class.validate_options(o, options)
  end

  module ClassMethods
    def validate_options(o, options = nil)
      if (options.nil?)
        unless defined?(self::OPTIONS)
          raise "validate_options needs OPTIONS hash defined"
        end
        options = self::OPTIONS
      end

      result = o.clone

      options.keys.each do |k|
        unless (result.has_key?(k))
          if (options[k] != :mandatory)
            result[k] = options[k]
          else
            raise "Mandatory option #{k} is missing"
          end
        end
      end

      result
    end
  end
end

end