sendHostname.js

/**
 * @fileoverview Send hostname on DOMContentLoaded.
 */

'use strict';

var isUndefined = require('../type/isUndefined');
var imagePing = require('./imagePing');

var ms7days = 7 * 24 * 60 * 60 * 1000;

/**
 * Check if the date has passed 7 days
 * @param {number} date - milliseconds
 * @returns {boolean}
 * @private
 */
function isExpired(date) {
  var now = new Date().getTime();

  return now - date > ms7days;
}

/**
 * Send hostname on DOMContentLoaded.
 * To prevent hostname set tui.usageStatistics to false.
 * @param {string} appName - application name
 * @param {string} trackingId - GA tracking ID
 * @ignore
 */
function sendHostname(appName, trackingId) {
  var url = 'https://www.google-analytics.com/collect';
  var hostname = location.hostname;
  var hitType = 'event';
  var eventCategory = 'use';
  var applicationKeyForStorage = 'TOAST UI ' + appName + ' for ' + hostname + ': Statistics';
  var date = window.localStorage.getItem(applicationKeyForStorage);

  // skip if the flag is defined and is set to false explicitly
  if (!isUndefined(window.tui) && window.tui.usageStatistics === false) {
    return;
  }

  // skip if not pass seven days old
  if (date && !isExpired(date)) {
    return;
  }

  window.localStorage.setItem(applicationKeyForStorage, new Date().getTime());

  setTimeout(function() {
    if (document.readyState === 'interactive' || document.readyState === 'complete') {
      imagePing(url, {
        v: 1,
        t: hitType,
        tid: trackingId,
        cid: hostname,
        dp: hostname,
        dh: appName,
        el: appName,
        ec: eventCategory
      });
    }
  }, 1000);
}

module.exports = sendHostname;