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class Noosfero::Plugin
  class Macro

    attr_accessor :context

    class << self
      # Options
      #
      # [:icon_path]  Determines the path to icon to be used in the button on
      #               tinymce
      # [:title]      Former name of the macro
      # [:skip_dialog]  Skip configuration dialog on tinymce
      # [:js_files]     Javascripts that should be included on tinymce
      # [:css_files     Css files that should be included on tinymce
      # [:generator]    Javascript code that will be loaded when the macro button
      #                 is clicked on tinymce
      # [:params]       Hash of macro fields that the user might configure
      #
      def configuration
        {}
      end

      def plugin
        name.split('::')[0...-1].join('::').constantize
      end

      def identifier
        name.underscore
      end
    end

    def initialize(context=nil)
      self.context = context
    end

    def attributes(macro)
      macro.attributes.to_hash.
        select {|key, value| key[0..10] == 'data-macro-'}.
        inject({}){|result, a| result.merge({a[0][11..-1] => a[1].to_s})}.
        with_indifferent_access
    end

    def convert(macro, source)
      macro_name = macro['data-macro']
      attrs = attributes(macro)

      begin
        content = parse(attrs, macro.inner_html, source)
        macro['class'] = "parsed-macro #{macro_name}"
      rescue Exception => exception
        content = _("Unsupported macro %s!") % macro_name
        macro['class'] = "failed-macro #{macro_name}"
      end

      attrs.each {|key, value| macro.remove_attribute("data-macro-#{key}")}
      content
    end

    # This is the method the macros should override
    def parse(attrs, inner_html, source)
      raise
    end

  end
end