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/>.

**/

​

​

/**

 * 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;

    }

​

    function resolveAudioState() {

        if (this.play_once_on_ready) {

            return this.once();