example of handling cookie data with full page cache

theshowcommunity-example.js

function readCookie(name) {
     var nameEQ = name + "=";
     var ca = document.cookie.split(';');
     for(var i=0;i < ca.length;i++) {
          var c = ca[i];
          while (c.charAt(0)==' ') c = c.substring(1,c.length);
          if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
     }
     return null;
}

function eraseCookie(name) {
  createCookie(name,"",-1);
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else
    var expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function flashNotice(){
  var notice = readCookie('flash_notice')
  if(notice){
    var unescaped = unescape(notice).replace(/\+/g,' ');
    eraseCookie('flash_notice')
    $('flash_notice').update(unescaped);
    $('flash_notice').show();
  } else {
    var error = readCookie('flash_error')
    if(error){
      var unescaped = unescape(error).replace(/\+/g,' ');
      eraseCookie('flash_error')
      $('flash_error').update(unescaped);
      $('flash_error').show();
    }
  } 
  return true;
}


function handleCachedUserLinks() {
  var username            = readCookie('username')
  var loginLink           = $('login')
  var logout              = $('logout')
  var myRecentGames       = $('myRecentGames')
  var userGreetings       = $('loginUsername')
  if (username == null){
    loginLink.show();
    logout.hide();
    if(myRecentGames){ myRecentGames.hide()};
  }else{
    // user is logged in and we have her username
    loginLink.hide();
    if(userGreetings){ userGreetings.update("<strong>Welcome " + username + '!</strong>'); }
    gamer_menu_links(username);
    gamer_card_links(username);
    logout.show();
    if(myRecentGames){ myRecentGames.show()};
  };

  return true;
}