module Represent
  module NavigationHelper
  
    def menu_for(item, options = {}, &block)
      if item.respond_to?(:children) && !item.children.blank?
        menu_tag(item.children, options, &block)
      else
        menu_tag(item, options, &block)
      end
    end
  
    # - menu_tag(c(:menu)) do |attributes, node|
    # 	- attributes[:class] = "one two"
    # 	- node[:title]
    def menu_tag(array, options = {}, &block)
      return "" if array.empty?
      menu_attributes = nil
      if options.has_key?(:menu_attributes)
        menu_attributes = options[:menu_attributes]
        options.delete(:menu_attributes)
      end
      haml_tag :ul, menu_attributes do
        array.each_with_index do |node, i|
          attributes = options.has_key?(:li_attributes) ? options[:li_attributes] : {}
          attributes[:class] ||= ""
          if i == 0 and options.has_key?(:first)
            attributes[:class] << " #{options[:first]}"
          elsif i == array.length - 1 and options.has_key?(:last)
            attributes[:class] << " #{options[:last]}"
          end
          haml_tag :li, attributes do
            if block_given?
              yield node
            else
              haml_concat node.title
            end
            next unless (node.respond_to?(:children))
            menu_tag(node.children, options, &block)
          end
        end
      end
    end
  
    def breadcrumb_for(item, options = {}, &block)
      options[:from] ||= "/" + item.url.gsub(/^\//, "").split("/").first
      options[:to] ||= item.url
      breadcrumb(options[:from], options, &block)
    end
  
    def breadcrumb(current_url, options, &block)
      item = site.find_by_url(current_url)
      return "" unless item
      haml_tag :a, options.merge(:href => current_url) do
        if block_given?
          yield item
        else
          haml_concat item.title
        end
      end
      if options[:to] != current_url
        haml_concat options[:delimiter] || " » "
        next_node = options[:to].gsub(/#{current_url}\/?/, "").split("/").first
        breadcrumb("#{current_url}/#{next_node}", options, &block)
      end
    end
  end
end