Zabbix

/*

** Zabbix

** Copyright (C) 2001-2022 Zabbix SIA

**

** 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 2 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, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

​

/**

 * Timeout controlled player.

 *

 * It plays, meanwhile decrementing timeout. Pausing and playing is done by control of 'volume' and 'muted' properties.

 * It holds infinite loop, so it allows us easily adjust timeout during playback.

 */

function ZBX_NotificationsAudio() {

    try {

        this.audio = new Audio();

​

        this.audio.volume = 0;

        this.audio.muted = true;

        this.audio.autoplay = true;

        this.audio.loop = true;

​

        this.audio.onloadeddata = this.handleOnloadeddata.bind(this);

​

        this.audio.load();

    }

    catch(e) {

        console.warn('Cannot support notification audio for this device.');

    }

​

    this.wave = '';

    this.ms_timeout = 0;

    this.is_playing = false;

    this.message_timeout = 0;

    this.callback = null;

​

    this.resetPromise();

    this.listen();

}

​

/**

 * Starts main loop.

 *

 * @return int  Interval ID.

 */

ZBX_NotificationsAudio.prototype.listen = function() {

    var ms_step = 10;

​

    if (!this.audio) {

        return;