require 'fabulator/tag_lib'
#require 'fabulator/radiant/actions/require_auth'

module Fabulator
  RADIANT_NS="http://dh.tamu.edu/ns/fabulator/radiant/1.0#"
  class FabulatorRequireAuth < StandardError
    def initialize(message = "") super; end
  end

  module Radiant
    class Lib < Fabulator::TagLib

      namespace RADIANT_NS

      #action 'require-auth', Fabulator::Radiant::Actions::RequireAuth

      #register_type 'user', {
      #}

      has_type :page do
        method :CHILDREN do |p|
          Page.find(p.value.to_i).children.collect { |c| Lib.page_to_node(c, p) }
        end
      end

      # page parts are attributes of a page
      # as are @name, @breadcrumb, @description, @keywords
      #        @layout, @page-type, @status
      # slug is the node name
      # page parts have attributes @filter
      has_type 'page-part' do
        going_to [ FAB_NS, 'string' ] do
          weight 1.0
          converting do |p|
            p.root.value
          end
        end
      end

      # 'radiant' axis
      #axis 'radiant' do |ctx|
      #  # returns the root 'Home' page for the site
      #  # children are addressable by their slug
      #  Lib.page_to_node(Page.find_by_parent_id(nil), ctx)
      #end

      function 'find', [ RADIANT_NS, 'page' ] do |ctx, args|
        args[0].collect { |a|
          Lib.page_to_node(Page.find_by_parent_id(nil).find_by_url(a.to_s), ctx.root)
        }
      end

      function 'current-user' do |ctx, args|
        u = UserActionObserver.current_user
        if !u.nil?
          n = ctx.root.anon_node(u.id) #, [ RADIANT_NS, 'user' ])
          n.set_attribute('admin', u.admin?)
          return [ n ]
        else
          return [ ]
        end
      end

      def self.page_to_node(p, ctx)
        return nil if p.nil?
        p_node = ctx.anon_node(p.id, [ RADIANT_NS, 'page' ])
        p_node.name = p.slug
        p.parts.each do |pp|
          #pp_node = ctx.anon_node(pp.content, [ RADIANT_NS, 'page-part' ])
          #pp_node.name = pp.name
          #pp_node.set_attribute('filter', pp.filter)
          #p_node.set_attribute(pp.name, pp_node)
          p_node.set_attribute(pp.name, pp.content)
        end
        p_node.set_attribute('title', p.title)
        p_node.set_attribute('breadcrumb', p.breadcrumb)
        p_node.set_attribute('description', p.description)
        p_node.set_attribute('keywords', p.keywords)
        #p_node.set_attribute('layout', p.layout)
        #p_node.set_attribute('page-type', p.page_type)
        #p_node.set_attribute('status', p.status)
        p_node
      end
    end
  end
end