acts_as_activity.rb

module RadiumCRM
  module ActsAsActivity
    def self.included(base)
      base.class_eval do 
        has_many :activities, :as => :reference, :dependent => :destroy do
          def create_with_tags(*tags)            
            activity = build :account => @owner.account
            
            activity.tag_list.add @owner.class.to_s.underscore
            activity.tag_list.add(tags)            
            activity.tag_list.add(@owner.state) if @owner.respond_to?(:state)
            
            activity.tag_list.add @owner.associated_tags
            
            activity.save!
            activity
          end
        end
      end
    end
  end
end