App.TreeNavigator =
  setNodes: (nodes) ->
    children = nodes.children("ul")

    if(children.length == 0)
      return

    children.each ->
      link = $(this).prev("a")
      $('<span class="open"></span>').insertBefore(link)
      App.TreeNavigator.setNodes($(this).children())

  initialize: ->
    elem = $("[data-tree-navigator]")
    if(elem.length == 0)
      return

    ul = elem.find("ul:eq(0)")
    if(ul.length && ul.children().length)
      App.TreeNavigator.setNodes(ul.children())

    $("[data-tree-navigator] span").on
      click: (e) ->
        elem = $(this)
        if(elem.hasClass("open"))
          elem.removeClass("open").addClass("closed")
          elem.siblings("ul").hide()
        else if(elem.hasClass("closed"))
          elem.removeClass("closed").addClass("open")
          elem.siblings("ul").show()

    if anchor = $(location).attr("hash")
      if link = elem.find("a[href='#{anchor}']")
        link.parents("ul").each ->
          $(this).show()
          $(this).siblings("span").removeClass("closed").addClass("open")