make cookie deletion optional

[chrome-ext/clearhistory-advance-fork.git] / javascript / clearhistory.js

// Copyright 2011 Google Inc. All Rights Reserved.

/**
 * @fileoverview The main script for the Clear History extension for Chrome.
 * @author arunjit@google.com (Arunjit Singh)
 */

/**
 * Removes a single cookie
 * @param {Object.<Cookie>} cookie The cookie to delete.
 * @param {Function} callback The function to invoke when the cookie is deleted.
 */
function removeCookie(cookie, callback) {
  var url = 'http' + (cookie.secure ? 's' : '') + '://' + cookie.domain +
            cookie.path;
  chrome.cookies.remove({url: url, name: cookie.name}, callback);
}

/**
 * Removes all cookies
 * @param {Function=} callback The function to invoke when all cookies are
 *     deleted (optional).
 */
function clearCookies(callback) {
  callback = callback || function() {};
  chrome.cookies.getAll({}, function(cookies) {
    var len = cookies.length;
    // Synchronize the cookie deletion and execute the callback only when all
    // cookie deletion functions have called back (finished).
    (function doCookieCleanup(i) {
      if (i === len) {
        callback();
      } else {
        removeCookie(cookies[i], function() {
          doCookieCleanup(i + 1);
        });
      }
    })(0);
  });
}

/**
 * Callback for when history deletion is successful
 */
function didClearHistory() {
  var time = ~~(localStorage['time']) || CONSTANTS.DEFAULT_TIME;
  time = getUnitsForTime(time);
  var timeString = (time.time === -1) ?
                   chrome.i18n.getMessage('notificationTimeAll') :
                   chrome.i18n.getMessage('notificationTime',
                                          [time.time, time.units]);
  var message = chrome.i18n.getMessage('notificationBody', timeString);
  var notification = webkitNotifications.createNotification(
      chrome.extension.getURL('/images/icon48.png'),
      chrome.i18n.getMessage('notificationTitle'),
      message);
  notification.show();
  setTimeout(function() {
    notification.cancel();
  }, 5000);
}

/**
 * Clears the history for the amount of time stored in {@code localStorage}
 */
function clearHistory() {
  //Get the values from localStorage
  // time is in hours
  var time = ~~(localStorage['time']) || CONSTANTS.DEFAULT_TIME;
  if (time === -1) {
    // Delete everything
    chrome.history.deleteAll(didClearHistory);
  } else {
    // Create the range
    var now = (new Date).getTime();
    var range = {
      startTime: (now - time * 60 * 60 * 1000),  // time from hrs to ms
      endTime: now
    };
    // Delete history in the range
    chrome.history.deleteRange(range, didClearHistory);
  }
}

/**
 * Executes when the user clicks the browser action. Uses stored values from
 * {@code localStorage}
 */
chrome.browserAction.onClicked.addListener(function(tab) {
  // Get the value from localStorage
  var showPrompt = localStorage['prompt'] || CONSTANTS.YES;
  var clearCookies = localStorage['cookies'] || CONSTANTS.NO;

  // The confirmation message to ask
  var message = chrome.i18n.getMessage('confirmPrompt');

  // Clear cookies, and then clear the history
  if (showPrompt === CONSTANTS.YES) {
    if (!confirm(message))
      return;
  }
  if (clearCookies === CONSTANTS.YES) {
    clearCookies(clearHistory);
  } else {
    clearHistory();
  }
});