javascript/clearhistory.js

   1 // Copyright 2011 Google Inc. All Rights Reserved.
   2
   3 /**
   4  * @fileoverview The main script for the Clear History extension for Chrome.
   5  * @author arunjit@google.com (Arunjit Singh)
   6  */
   7
   8 /**
   9  * Removes a single cookie
  10  * @param {Object.<Cookie>} cookie The cookie to delete.
  11  * @param {Function} callback The function to invoke when the cookie is deleted.
  12  */
  13 function removeCookie(cookie, callback) {
  14   var url = 'http' + (cookie.secure ? 's' : '') + '://' + cookie.domain +
  15             cookie.path;
  16   chrome.cookies.remove({url: url, name: cookie.name}, callback);
  17 }
  18
  19 /**
  20  * Removes all cookies
  21  * @param {Function=} callback The function to invoke when all cookies are
  22  *     deleted (optional).
  23  */
  24 function clearCookies(callback) {
  25   callback = callback || function() {};
  26   chrome.cookies.getAll({}, function(cookies) {
  27     var len = cookies.length;
  28     // Synchronize the cookie deletion and execute the callback only when all
  29     // cookie deletion functions have called back (finished).
  30     (function doCookieCleanup(i) {
  31       if (i === len) {
  32         callback();
  33       } else {
  34         removeCookie(cookies[i], function() {
  35           doCookieCleanup(i + 1);
  36         });
  37       }
  38     })(0);
  39   });
  40 }
  41
  42 /**
  43  * Callback for when history deletion is successful
  44  */
  45 function didClearHistory() {
  46   var time = ~~(localStorage['time']) || CONSTANTS.DEFAULT_TIME;
  47   time = getUnitsForTime(time);
  48   var timeString = (time.time === -1) ?
  49                    chrome.i18n.getMessage('notificationTimeAll') :
  50                    chrome.i18n.getMessage('notificationTime',
  51                                           [time.time, time.units]);
  52   var message = chrome.i18n.getMessage('notificationBody', timeString);
  53   var notification = webkitNotifications.createNotification(
  54       chrome.extension.getURL('/images/icon48.png'),
  55       chrome.i18n.getMessage('notificationTitle'),
  56       message);
  57   notification.show();
  58   setTimeout(function() {
  59     notification.cancel();
  60   }, 5000);
  61 }
  62
  63 /**
  64  * Clears the history for the amount of time stored in {@code localStorage}
  65  */
  66 function clearHistory() {
  67   //Get the values from localStorage
  68   // time is in hours
  69   var time = ~~(localStorage['time']) || CONSTANTS.DEFAULT_TIME;
  70   if (time === -1) {
  71     // Delete everything
  72     chrome.history.deleteAll(didClearHistory);
  73   } else {
  74     // Create the range
  75     var now = (new Date).getTime();
  76     var range = {
  77       startTime: (now - time * 60 * 60 * 1000),  // time from hrs to ms
  78       endTime: now
  79     };
  80     // Delete history in the range
  81     chrome.history.deleteRange(range, didClearHistory);
  82   }
  83 }
  84
  85 /**
  86  * Executes when the user clicks the browser action. Uses stored values from
  87  * {@code localStorage}
  88  */
  89 chrome.browserAction.onClicked.addListener(function(tab) {
  90   //calls the method to provide the Google Analytics Data
  91   getAnalyticsData();
  92   // Get the value from localStorage
  93   var showPrompt = localStorage['prompt'] || CONSTANTS.YES;
  94
  95   // The confirmation message to ask
  96   var message = chrome.i18n.getMessage('confirmPrompt');
  97
  98   // Clear cookies, and then clear the history
  99   if (showPrompt === CONSTANTS.YES) {
 100     confirm(message) && clearCookies(clearHistory);
 101   } else {
 102     clearCookies(clearHistory);
 103   }
 104 });
 105
 106    var _gaq = _gaq || [];
 107 /**
 108  * provides the Google analytics data
 109  */
 110 function getAnalyticsData() {
 111   _gaq.push(['_setAccount', 'UA-28968723-1']);
 112   _gaq.push(['_trackPageview']);
 113
 114   (function() {
 115     var ga = document.createElement('script'); ga.type = 'text/javascript';
 116     ga.async = true;
 117     ga.src = 'https://ssl.google-analytics.com/ga.js';
 118     var s = document.getElementsByTagName('script')[0];
 119     s.parentNode.insertBefore(ga, s);
 120   })();
 121 }