gistfile1.txt

trait GroupMenu extends SnippetHelpers {

  def itemHtml: NodeSeq
  def itemActiveHtml: NodeSeq
  def outerHtml: NodeSeq

  def render(in: NodeSeq): NodeSeq = {
    for {
      group <- S.attr("group") ?~ "Group not specified"
      sitemap <- LiftRules.siteMap ?~ "Sitemap is empty"
      request <- S.request ?~ "Request is empty"
      curLoc <- request.location ?~ "Current location is empty"
    } yield {
      val ns: NodeSeq = sitemap.locForGroup(group) flatMap { loc =>
        val itemCssSel = "* *" #> SiteMap.buildLink(loc.name)
        if (curLoc.name == loc.name)
          itemCssSel.apply(itemActiveHtml)
        else
          itemCssSel.apply(itemHtml)
      }
      ("* *" #> ns).apply(outerHtml)
    }
  }
}