bigbluebutton-Github/bigbluebutton-html5/imports/api/meetings/server/modifiers/updateRandomViewer.js
2023-03-20 16:24:41 -03:00

144 lines
4.0 KiB
JavaScript

import Meetings from '/imports/api/meetings';
import Logger from '/imports/startup/server/logger';
import { check } from 'meteor/check';
const SELECT_RANDOM_USER_COUNTDOWN = Meteor.settings.public.selectRandomUser.countdown;
// Time intervals in milliseconds
// for iteration in animation.
const intervals = [0, 200, 450, 750, 1100, 1500];
// Used to togle to the first value of intervals to
// differenciare whether this function has been called
let updateIndicator = true;
// A finction that toggles
// the first interval on each call
function toggleIndicator() {
if (updateIndicator) {
intervals[0] = 1;
} else {
intervals[0] = 0;
}
updateIndicator = !updateIndicator;
}
function getFiveRandom(userList, userIds) {
let IDs = userIds.slice();
for (let i = 0; i < intervals.length - 1; i += 1) {
if (IDs.length === 0) { // we used up all the options
IDs = userIds.slice(); // start over
let userId = IDs.splice(0, 1);
if (userList[userList.length] === [userId, intervals[i]]) {
// If we start over with the one we finnished, change it
IDs.push(userId);
userId = IDs.splice(0, 1);
}
userList.push([userId, intervals[i]]);
} else {
const userId = IDs.splice(Math.floor(Math.random() * IDs.length), 1);
userList.push([userId, intervals[i]]);
}
}
}
// All possible combinations of 3 elements
// to speed up randomizing
const optionsFor3 = [
[0, 1, 2],
[0, 2, 1],
[1, 2, 0],
[1, 0, 2],
[2, 0, 1],
[2, 1, 0],
];
export default async function updateRandomUser(meetingId, userIds, choice, requesterId) {
check(meetingId, String);
check(userIds, Array);
check(choice, String);
check(requesterId, String);
let userList = [];
const selector = {
meetingId,
};
toggleIndicator();
const numberOfUsers = userIds.length;
if (choice === '') {
// no viewer
userList = [
[requesterId, intervals[0]],
[requesterId, 0],
[requesterId, 0],
[requesterId, 0],
[requesterId, 0],
[requesterId, 0],
];
} else if (numberOfUsers === 1) { // If user is only one, obviously it is the chosen one
userList = [
[userIds[0], intervals[0]],
[userIds[0], 0],
[userIds[0], 0],
[userIds[0], 0],
[userIds[0], 0],
[userIds[0], 0],
];
} else if (!SELECT_RANDOM_USER_COUNTDOWN) {
// If animation is disabled, we only care about the chosen one
userList = [
[choice, intervals[0]],
[choice, 0],
[choice, 0],
[choice, 0],
[choice, 0],
[choice, 0],
];
} else if (numberOfUsers === 2) { // If there are only two users, we can just chow them in turns
const IDs = userIds.slice();
IDs.splice(choice, 1);
userList = [
[IDs[0], intervals[0]],
[choice, intervals[1]],
[IDs[0], intervals[2]],
[choice, intervals[3]],
[IDs[0], intervals[4]],
[choice, intervals[5]],
];
} else if (numberOfUsers === 3) {
// If there are 3 users, the number of combinations is small, so we'll use that
const option = Math.floor(Math.random() * 6);
const order = optionsFor3[option];
userList = [
[userIds[order[0]], intervals[0]],
[userIds[order[1]], intervals[1]],
[userIds[order[2]], intervals[2]],
[userIds[order[0]], intervals[3]],
[userIds[order[1]], intervals[4]],
[choice, intervals[5]],
];
} else { // We generate 5 users randomly, just for animation, and last one is the chosen one
getFiveRandom(userList, userIds);
userList.push([choice, intervals[intervals.length]]);
}
const modifier = {
$set: {
randomlySelectedUser: userList,
},
};
try {
const { insertedId } = await Meetings.upsertAsync(selector, modifier);
if (insertedId) {
Logger.info(`Set randomly selected userId and interval = ${userList} by requesterId=${requesterId} in meeitingId=${meetingId}`);
}
} catch (err) {
Logger.error(`Setting randomly selected userId and interval = ${userList} by requesterId=${requesterId} in meetingId=${meetingId}`);
}
}