def signup(xhtml: NodeSeq): NodeSeq = {
  val user = new User

  bind("f", xhtml,
    "firstName" -> SHtml.text(user.firstName, user.firstName = _),
    "lastName" -> SHtml.text(user.lastName, user.lastName = _),
    "nickName" -> SHtml.text(user.nickName, user.nickName = _),
    "password" -> SHtml.password("", user.password = _),
    "passwordConfirmation" -> SHtml.password("", user.passwordConfirmation = _),
    "send" -> SHtml.submit("Sign up", () => {
      user.register match {
        case Errors(e) => S.error(user.errors.fullMessages.map(e => <li>{e}</li>))
        case _ =>
          S.notice("User created")
          S.redirectTo("/")
      }
    })
  )
}