Orbit/lib/orbit_model/status.rb

module OrbitModel

  module Status

    def self.included(base)
      base.extend ClassMethods
      base.class_eval do
        field :is_top, :type => Boolean, :default => false 
        field :is_hot, :type => Boolean, :default => false 
        field :is_hidden, :type => Boolean, :default => false
        query = {type: 'where', conditions: {is_hidden: false}}
        if class_variable_defined?(:@@can_display)
          class_variable_set(:@@can_display, (class_variable_get(:@@can_display) << query))
        else
          class_variable_set(:@@can_display, [query])
        end
        send :include, InstanceMethods
      end
    end

    module InstanceMethods

      def is_top?
        self.is_top
      end
      
      def is_hot?
        self.is_hot
      end
      
      def is_hidden?
        self.is_hidden
      end
      
    end

    module ClassMethods

      define_method(:can_display) do
        final_query = class_variable_get(:@@can_display).inject('') do |result, query_hash|
          result << "." if result.present?
          result << "#{query_hash[:type]}(#{query_hash[:conditions]})"
          result
        end
        eval(final_query)
      end unless method_defined? :can_display

    end

  end

end