103 lines
2.8 KiB
JavaScript
103 lines
2.8 KiB
JavaScript
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/**
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; under version 2
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* of the License (non-upgradable).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2015 (original work) Open Assessment Technologies SA;
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*
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* Keep duration of test-taker activity in localstorage
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*/
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define([], function () {
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'use strict';
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/**
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* @param {Object} options
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* @param {string} options.accuracy - period of user status checking
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*/
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var sessionStateFactory = function sessionStateFactory(options) {
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var _storageKey = 'sessionState_active_for',
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_accuracy,
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_interval = null;
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var sessionState = {
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reset: function reset() {
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_reset();
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},
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restart: function restart() {
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_reset();
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_start();
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},
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getDuration: function getDuration() {
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return getLocalStorageData();
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}
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};
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function _start() {
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if (null !== _interval) {
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throw new TypeError('Tracking is already started');
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}
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_interval = setInterval(function () {
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setLocalStorageData(getLocalStorageData() + _accuracy);
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}, _accuracy);
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}
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function _stop() {
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clearInterval(_interval);
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_interval = null;
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}
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function _reset() {
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_stop();
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clearLocalStorage();
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}
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function _init() {
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_accuracy = options && options.accuracy || 1000;
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}
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_init();
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/**
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* Store duration in ms to local storage
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* @param {*} val - data to be stored.
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*/
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function setLocalStorageData(val) {
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window.localStorage.setItem(_storageKey, val);
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}
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/**
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* Get duration from local storage
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* @returns {int} in ms
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*/
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function getLocalStorageData() {
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var data = window.localStorage.getItem(_storageKey),
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result = JSON.parse(data) || 0;
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return result;
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}
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/**
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* Clear storage
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*/
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function clearLocalStorage() {
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window.localStorage.removeItem(_storageKey);
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}
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return sessionState;
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};
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return sessionStateFactory;
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});
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