altinn-designsystem/source/js/production/modules/sessionExpiredDialog.js

Altinn Design system based on Pattern Lab.

/* globals AltinnModal */
var sessionExpiredDialog = function() {
  var cookie;
  // How long does a session last
  var sessionTimeout = 30;
  // How long before checking for a valid session for the first time
  var firstCheckTimeout = sessionTimeout - 1;
  // How often to check if the session is valid
  var checkTimeout = 2;
  var loggedOutMessage = 'Du har vært inaktiv i mer enn 30 minutter, og er nå logget ut.';
  var cookieName = 'sessionExpiredDialog';
  var isLoggedIn = false;
  var intervarHandler = null;

  function minutesToMilliseconds(minutes) {
    return minutes * 60 * 1000;
  }

  function getCookie() {
    var cookieValue = document.cookie.replace(new RegExp('(?:(?:^|.*;\\s*)' + cookieName + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');

    return cookieValue;
  }

  function stopInterval() {
    if (intervarHandler != null) {
      window.clearInterval(intervarHandler);
      intervarHandler = null;
    }
  }

  function showLoggedOutMessage() {
    alert(loggedOutMessage);
  }

  function reloadPage() {
    window.location.reload();
  }

  function deleteCookie() {
    document.cookie = cookieName + '=; expires=0';
  }

  function checkCookie() {
    var sessionExpiresIn;
    var now = new Date();

    cookie = getCookie();
    sessionExpiresIn = new Date(cookie);

    if (now > sessionExpiresIn) {
      deleteCookie();
      stopInterval();
      showLoggedOutMessage();
      reloadPage();
    }
  }

  function startCheckTimer() {
    intervarHandler = window.setInterval(checkCookie, minutesToMilliseconds(checkTimeout));
  }

  function createCookie() {
    var now = new Date();
    // We store the time when the session should expire, in 30 mins
    now.setTime(now.getTime() + minutesToMilliseconds(sessionTimeout));
    document.cookie = cookieName + '=' + now.toUTCString();
    // We start a timer to check in 28 mins, every 2 mins for an expired session
    window.setTimeout(startCheckTimer, minutesToMilliseconds(firstCheckTimeout));
  }

  if (window.sessionValidation !== undefined && window.sessionValidation != null) {
    sessionTimeout = window.sessionValidation.timeout;
    loggedOutMessage = window.sessionValidation.loggedOutMessage;
    isLoggedIn = window.sessionValidation.loggedIn;

    if (isLoggedIn) {
      cookie = getCookie();
      if (cookie === '') {
        createCookie();
      } else {
        startCheckTimer();
      }
    } else {
      deleteCookie();
    }
  }
};