Current File : //home2/vacivi36/ava/mod/bigbluebuttonbn/amd/src/roomupdater.js
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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.
//
// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* JS room updater.
*
* @module mod_bigbluebuttonbn/roomupdater
* @copyright 2021 Blindside Networks Inc
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
import Pending from 'core/pending';
import Templates from "core/templates";
import {exception as displayException} from 'core/notification';
import {getMeetingInfo} from './repository';
let timerReference = null;
let timerRunning = false;
let pollInterval = 0;
let pollIntervalFactor = 1;
const MAX_POLL_INTERVAL_FACTOR = 10;
const resetValues = () => {
timerRunning = false;
timerReference = null;
pollInterval = 0;
pollIntervalFactor = 1;
};
/**
* Start the information poller.
* @param {Number} interval interval in miliseconds between each poll action.
*/
export const start = (interval) => {
resetValues();
timerRunning = true;
pollInterval = interval;
poll();
};
/**
* Stop the room updater.
*/
export const stop = () => {
if (timerReference) {
clearTimeout(timerReference);
}
resetValues();
};
/**
* Start the information poller.
*/
const poll = () => {
if (!timerRunning || !pollInterval) {
// The poller has been stopped.
return;
}
updateRoom()
.then((updateOk) => {
if (!updateOk) {
pollIntervalFactor = (pollIntervalFactor < MAX_POLL_INTERVAL_FACTOR) ?
pollIntervalFactor + 1 : MAX_POLL_INTERVAL_FACTOR;
// We make sure if there is an error that we do not try too often.
}
timerReference = setTimeout(() => poll(), pollInterval * pollIntervalFactor);
return true;
})
.catch();
};
/**
* Update the room information.
*
* @param {boolean} [updatecache=false] should we update cache
* @returns {Promise}
*/
export const updateRoom = (updatecache = false) => {
const bbbRoomViewElement = document.getElementById('bigbluebuttonbn-room-view');
if (bbbRoomViewElement === null) {
return Promise.resolve(false);
}
const bbbId = bbbRoomViewElement.dataset.bbbId;
const groupId = bbbRoomViewElement.dataset.groupId;
const pendingPromise = new Pending('mod_bigbluebuttonbn/roomupdater:updateRoom');
return getMeetingInfo(bbbId, groupId, updatecache)
.then(data => {
// Just make sure we have the right information for the template.
data.haspresentations = !!(data.presentations && data.presentations.length);
return Templates.renderForPromise('mod_bigbluebuttonbn/room_view', data);
})
.then(({html, js}) => Templates.replaceNode(bbbRoomViewElement, html, js))
.then(() => pendingPromise.resolve())
.catch(displayException);
};
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