Zabbix

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

​

/**

 * Default value in seconds, for poller interval.

 */

ZBX_Notifications.POLL_INTERVAL = 5;

​

ZBX_Notifications.ALARM_SEVERITY_RESOLVED = -1;

ZBX_Notifications.ALARM_INFINITE_SERVER = -1;

ZBX_Notifications.ALARM_ONCE_PLAYER = -1;

ZBX_Notifications.ALARM_ONCE_SERVER = 1;

​

/**

 * Fetches and renders notifications. Server always returns full list of actual notifications that this class will

 * render into DOM. Last focused ZBX_BrowserTab instance is the active one. Active ZBX_BrowserTab instance is the only

 * one that polls server, meanwhile other instances are inactive. This is achieved by synchronizing state of active tab

 * via ZBX_LocalStorage and responding to it's change event.

 *

 * Only methods prefixed with <push> are the "action dispatchers", methods prefixed with <handlePushed> responds to

 * these "actions" by passing the new received state value through a method prefixed with <consume> that will adjust

 * instance's internal state, that in turn can be dispatched as "action". Other methods prefixed with <handle> responds

 * to other events than localStorage change event - (poll, focus, timeout..) and still they would reuse <consume>

 * domain methods and issue an action via <push> if needed and call to render method explicitly. The <handlePushed> is

 * not reused on the instance that produces the action. This is so to reduce complexity and increase maintainability,

 * because when an action produces an action, logic diverges deep, instead <consume> various domain within logic

 * and call `render` once, then <push> into localStorage once.

 *

 * Methods prefixed with <render> uses only consumed internal state and should not <push> any changes.

 *

 * @param {ZBX_LocalStorage} store

 * @param {ZBX_BrowserTab} tab

 */

function ZBX_Notifications(store, tab) {

    if (!(store instanceof ZBX_LocalStorage) || !(tab instanceof ZBX_BrowserTab)) {

        throw 'Unmatched signature!';

    }

​

    this.active = false;

​

    this.poll_interval = ZBX_Notifications.POLL_INTERVAL;

​

    this.store = store;

    this.tab = tab;

​

    this.collection = new ZBX_NotificationCollection();

    this.alarm = new ZBX_NotificationsAlarm(new ZBX_NotificationsAudio());

​

    this.fetchUpdates();

​

    this.consumeList(this._cached_list);