/*
 * NoScript Commons Library
 * Reusable building blocks for cross-browser security/privacy WebExtensions.
 * Copyright (C) 2020-2021 Giorgio Maone <https://maone.net>
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <https://www.gnu.org/licenses/>.
 */

var TabCache = (() => {

  let cache = new Map();

  browser.tabs.onUpdated.addListener((tabId, changes, tab) => {
    cache.set(tabId, tab);
  });

  browser.tabs.onRemoved.addListener(tabId => {
    cache.delete(tabId);
  });

  (async () => {
    for (let tab of await browser.tabs.query({})) {
      cache.set(tab.id, tab);
    }
  })();

  return {
    get(tabId) {
      return cache.get(tabId);
    }
  };
})();