# A mixin for Pacemaker::Resource subclasses which support meta attributes
# (priority, target-role, is-managed)

module Pacemaker
  class Resource
    module Meta
      def self.included(base)
        base.extend ClassMethods
      end

      attr_accessor :meta

      def meta_string
        self.class.meta_string(meta)
      end

      module ClassMethods
        def meta_string(meta)
          return "" if ! meta or meta.empty?
          "meta " +
            meta.sort.map do |key, value|
            %'#{key}="#{value}"'
          end.join(' ')
        end
      end
    end
  end
end