module MasterView
  module Directives

    # outputs an if/end block around the text tags
    # 
    class If < MasterView::DirectiveBase

      metadata :priority => 'High',
        :category => 'erb',
        :description => 'Wraps the element with an if... end block using the attribute value for the condition'

      #TODO: omit element entirely if attr_value == 'false'
      #TODO: don't need to generate conditional block wrapping if attr_value == 'true'

      event :before_stag do
        render erb_eval( 'if', attr_value )
      end

      event :after_etag do
        render erb_eval( 'end' )
      end

    end
  end
end