module SimpleAudit
  
  # Сделать запись в аудит-лог из контроллера
  # записи автоматически присваевается user_id и прочие параметры
  # для дополнительной информации есть поле 'extra'
  def audit(extra='')
    return false unless current_user
    Audit.create(:user_id => current_user.id, :resource => params[:controller], :action => params[:action], :extra => extra)
    # logger.warn "Eeeei, it works!"
  end

    module ControllerMethods
      module Application
        def self.included(controller)
          controller.extend ClassMethods
          controller.class_inheritable_accessor :auditables
          controller.auditables = []
          controller.before_filter :audit_actions
        end

      private

        # подсмотрено у simple_authorization, кажется
        def audit_actions
          return if !current_user

          self.class.auditables.each do |actions|
            options = actions.last.is_a?(Hash) ? actions.last : {}

            next if options[:if] && !options[:if].call(self)
            next if options[:unless] && options[:unless].call(self)
            next if options[:only] && !auditable_actions(options[:only]).include?(action_name)
            next if options[:except] && auditable_actions(options[:except]).include?(action_name)

            audit()
          end
        end
        
        def auditable_actions(actions)
          actions = [actions] unless actions.is_a?(Array)
          actions.map(&:to_s)
        end


        module ClassMethods
          
          # before_filter для контроллеров
          def audit_this(*actions)
            auditables << actions
          end
        end
        
      end
    end
end

%w{ models controllers helpers views views/audits }.each do |dir|
  path = File.join(File.dirname(__FILE__), 'app', dir)
  $LOAD_PATH << path
  ActiveSupport::Dependencies.load_paths << path
  ActiveSupport::Dependencies.load_once_paths.delete(path)
end

# optionally:
# Dir.glob(File.join(File.dirname(__FILE__), "db", "migrate", "*")).each do |file|
#   require file
# end