Teams meeting auto hangup

teamsautohang.js

// ==UserScript==
// @name         New Userscript
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://teams.microsoft.com/*
// @icon         https://www.google.com/s2/favicons?domain=teams.microsoft.com
// @grant        none
// ==/UserScript==

(function () {
    class AutoHangClass {
        constructor() {
            this.maxnumber = 0
            this.lastcheckednumber = 0
            this.QUIT_THRESHOLD_DIVIDER = 2
            this.intervalhandle = null
            this.controldiv = undefined
            this.running = false
        }

        getpeople() {
            let label = document.querySelectorAll('.roster-list-title')[1].ariaLabel
            let splitted = label.split(' ')
            if (label.startsWith("Currently in this meeting")) {
                return parseInt(splitted[splitted.length - 1])
            }
            return undefined
        }
        stopcheck() {
            if (this.intervalhandle) {
                clearInterval(this.intervalhandle)
                this.intervalhandle = null
            }
            this.controldiv.onclick = 'window.AutoHanger.stopcheck()'
            this.controldiv.innerText = 'Q'
            this.running = false
            this.maxnumber = 0
            this.lastcheckednumber = 0
        }
        doquit() {
            console.log('hanging up')
            document.querySelector('#hangup-button').click()
            this.stopcheck()
        }
        checkandquit() {
            let n = this.getpeople()
            console.log(`current remaining: ${n}`)
            if (this.running) {
                this.controldiv.innerText = `${n}`
            }
            if (n < this.lastcheckednumber && n < this.maxnumber / this.QUIT_THRESHOLD_DIVIDER) {
                this.doquit()
                return
            }
            this.lastcheckednumber = n
            if (n > this.maxnumber) {
                this.maxnumber = n
            }
        }
        startcheck() {
            this.intervalhandle = setInterval(() => this.checkandquit(), 1000)
            this.running = true
        }
        addcontrol() {
            let elem = document.createElement('div')
            elem.innerHTML = '<div id="controldiv" style="color: #adadad61;position: absolute;bottom: 117px;left: 0;z-index: 99999;">Q</div>'
            document.body.append(elem.firstChild)
            this.controldiv = document.querySelector('#controldiv')
            this.controldiv.addEventListener('click', () => {
                if (this.running) {
                    this.stopcheck()
                } else {
                    this.startcheck()
                }
            })
        }
    }

    window.AutoHanger = new AutoHangClass()
    window.AutoHanger.addcontrol()

})()