package controllersimport play.api._import play.api.mvc._import play.api.data._import play.api.data.Forms._/* * Application sets a cookie in plain ASCII on the * clients browser recording the visits of a page. */object Application extends Controller { //no or invalid cookie results in the counter being 0 def gt_cookie(c: Option[Cookie]) : Int = c.map(_.value) match { case Some(s) if (s.forall(_.isDigit)) => s.toInt case _ => 0 } def mk_cookie(i: Int) : Cookie = { Cookie("visits", i.toString) } // GET request: read cookie data first def index = Action { request => //reads the cookie and extracts the visits counter val visits_cookie = request.cookies.get("visits") val visits = gt_cookie(visits_cookie) //printing a message according to value of visits counter val msg1 = "You are a valued customer who has visited this site %d times." val msg2 = "You have visited this site %d times." val msg = if (visits >= 10) msg1.format(visits) else msg2.format(visits) //send message with new cookie Ok(msg).as(HTML).withCookies(mk_cookie(visits + 1)) }}