Differential D2978 Diff 8513 src/resources/js/meet/room.js

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src/resources/js/meet/room.js

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				'use strict'

				import anchorme from 'anchorme'
				import { Client } from './client.js'
				import { Roles } from './constants.js'
				import { Dropdown } from 'bootstrap'
				import { library } from '@fortawesome/fontawesome-svg-core'

				function Room(container)
				{
				let sessionData // Room session metadata
				let peers = {} // Participants in the session (including self)
				let publishersContainer // Container element for publishers
				let subscribersContainer // Container element for subscribers
				let selfId // peer Id of the current user

				let chatCount = 0
				let scrollStop
				let $t
				let $toast

				const client = new Client()

				// Disconnect participant when browser's window close
				window.addEventListener('beforeunload', () => {
				leaveRoom()
				})

				window.addEventListener('resize', resize)

				// Public methods
				this.isScreenSharingSupported = isScreenSharingSupported
				this.joinRoom = joinRoom
				this.leaveRoom = leaveRoom
				this.raiseHand = raiseHand
				this.setupStart = setupStart
				this.setupStop = setupStop
				this.setupSetAudioDevice = setupSetAudioDevice
				this.setupSetVideoDevice = setupSetVideoDevice
				this.switchAudio = switchAudio
				this.switchChannel = switchChannel
				this.switchScreen = switchScreen
				this.switchVideo = switchVideo

				/**
				* Join the room session
				*
				* @param data Session metadata and event handlers:
				* token - A token for the main connection,
				* nickname - Participant name,
				* languages - Supported languages (code-to-label map)
				* chatElement - DOM element for the chat widget,
				* counterElement - DOM element for the participants counter,
				* menuElement - DOM element of the room toolbar,
				* queueElement - DOM element for the Q&A queue (users with a raised hand)
				* onSuccess - Callback for session connection (join) success
				* onError - Callback for session connection (join) error
				* onDestroy - Callback for session disconnection event,
				* onMediaSetup - Called when user clicks the Media setup button
				* onUpdate - Callback for current user/session update,
				* toast - Toast widget
				* translate - Translation function
				*/
				function joinRoom(data) {
				// Create a container for subscribers and publishers
				publishersContainer = $('<div id="meet-publishers">').appendTo(container).get(0)
				subscribersContainer = $('<div id="meet-subscribers">').appendTo(container).get(0)

				resize()

				$t = data.translate
				$toast = data.toast

				// Make sure all supported callbacks exist, so we don't have to check
				// their existence everywhere anymore
				let events = ['Success', 'Error', 'Destroy', 'Update', 'MediaSetup']

				events.map(event => 'on' + event).forEach(event => {
				if (!data[event]) {
				data[event] = () => {}
				}
				})

				sessionData = data

				// Handle new participants (including self)
				client.on('addPeer', (event) => {
				if (event.isSelf) {
				selfId = event.id
				}

				peers[event.id] = event

				event.element = participantCreate(event, event.videoElement)

				if (event.raisedHand) {
				peerHandUp(event)
				}
				})

				// Handle removed participants
				client.on('removePeer', (peerId) => {
				let peer = peers[peerId]

				if (peer) {
				// Remove elements related to the participant
				peerHandDown(peer)

				$(peer.element).remove()
				if (peer.screen) {
				$(peer.screen).remove()
				}

				delete peers[peerId]
				}

				resize()
				})

				// Participant properties changed e.g. audio/video muted/unmuted
				client.on('updatePeer', (event, changed) => {
				let peer = peers[event.id]

				if (!peer) {
				return
				}

				event.element = peer.element
				event.screen = peer.screen

				// Video element added or removed
				if (event.videoElement && event.videoElement.parentNode != event.element) {
				$(event.element).prepend(event.videoElement)
				} else if (!event.videoElement) {
				$(event.element).find('video').remove()
				}

				// Video element of the shared screen added or removed
				if (event.screenVideoElement && !event.screen) {
				const screen = { id: event.id, role: event.role \| Roles.SCREEN, nickname: event.nickname }
				event.screen = participantCreate(screen, event.screenVideoElement)
				} else if (!event.screenVideoElement && event.screen) {
				$(event.screen).remove()
				event.screen = null
				resize()
				}

				peers[event.id] = event

				if (changed && changed.length) {
				if (changed && changed.includes('nickname')) {
				nicknameUpdate(event.nickname, event.id)
				}

				if (changed.includes('raisedHand')) {
				if (event.raisedHand) {
				peerHandUp(event)
				} else {
				peerHandDown(event)
				}
				}

				if (changed && changed.includes('screenWidth')) {
				resize()
				return
				}
				}

				if (changed && changed.includes('interpreterRole')
				&& !event.isSelf && $(event.element).find('video').length
				) {
				// Publisher-to-interpreter or vice-versa, move element to the subscribers list or vice-versa,
				// but keep the existing video element
				let wrapper = participantCreate(event, $(event.element).find('video'))
				event.element.remove()
				event.element = wrapper
				} else if (changed && changed.includes('publisherRole') && !event.language) {
				// Handle publisher-to-subscriber and subscriber-to-publisher change
				event.element.remove()
				event.element = participantCreate(event, event.videoElement)
				} else {
				participantUpdate(event.element, event)
				}

				// It's me, got publisher role
				if (event.isSelf && (event.role & Roles.PUBLISHER) && changed && changed.includes('publisherRole')) {
				// Open the media setup dialog
				sessionData.onMediaSetup()
				}

				if (changed && changed.includes('moderatorRole')) {
				participantUpdateAll()
				}
				})

				// Handle successful connection to the room
				client.on('joinSuccess', () => {
				data.onSuccess()
				client.media.setupStop()
				})

				// Handle join requests from other users (knocking to the room)
				client.on('joinRequest', event => {
				joinRequest(event)
				})

				// Handle session disconnection events
				client.on('closeSession', event => {
				// Notify the UI
				data.onDestroy(event)

				// Remove all participant elements
				Object.keys(peers).forEach(peerId => {
				$(peers[peerId].element).remove()
				})
				peers = {}

				// refresh the matrix
				resize()
				})

				// Handle session update events (e.g. channel, channels list changes)
				client.on('updateSession', event => {
				// Inform the vue component, so it can update some UI controls
				sessionData.onUpdate(event)
				})

				const { audioSource, videoSource } = client.media.setupData()

				// Start the session
				client.joinSession(data.token, { videoSource, audioSource, nickname: data.nickname })

				// Prepare the chat
				initChat()
				}

				/**
				* Leave the room (disconnect)
				*/
				function leaveRoom(forced) {
				client.closeSession(forced)
				peers = {}
				}

				/**
				* Handler for an event received by the moderator when a participant
				* is asking for a permission to join the room
				*/
				function joinRequest(data) {
				const id = data.requestId

				// The toast for this user request already exists, ignore
				// It's not really needed as we do this on server-side already
				if ($('#i' + id).length) {
				return
				}

				const body = $(
				`<div>`
				+ `<div class="picture"><img src="${data.picture}"></div>`
				+ `<div class="content">`
				+ `<p class="mb-2"></p>`
				+ `<div class="text-end">`
				+ `<button type="button" class="btn btn-sm btn-success accept">${$t('btn.accept')}</button>`
				+ `<button type="button" class="btn btn-sm btn-danger deny ms-2">${$t('btn.deny')}</button>`
				)

				$toast.message({
				className: 'join-request',
				icon: 'user',
				timeout: 0,
				title: $t('meet.join-request'),
				// titleClassName: '',
				body: body.html(),
				onShow: element => {
				$(element).find('p').text($t('meet.join-requested', { user: data.nickname \|\| '' }))

				// add id attribute, so we can identify it
				$(element).attr('id', 'i' + id)
				// add action to the buttons
				.find('button.accept,button.deny').on('click', e => {
				const action = $(e.target).is('.accept') ? 'Accept' : 'Deny'
				client['joinRequest' + action](id)
				$('#i' + id).remove()
				})
				}
				})
				}

				/**
				* Raise or lower the hand
				*
				* @param status Hand raised or not
				*/
				async function raiseHand(status) {
				return await client.raiseHand(status)
				}

				/**
				* Sets the audio and video devices for the session.
				* This will ask user for permission to access media devices.
				*
				* @param props Setup properties (videoElement, volumeElement, onSuccess, onError)
				*/
				function setupStart(props) {
				client.media.setupStart(props)

				// When setting up devices while the session is ongoing we have to
				// disable currently selected devices (temporarily) otherwise e.g.
				// changing a mic or camera to another device will not be possible.
				if (client.isJoined()) {
				client.setMic('')
				client.setCamera('')
				}
				}

				/**
				* Stop the setup "process", cleanup after it.
				*/
				async function setupStop() {
				client.media.setupStop()

				// Apply device changes to the client
				const { audioSource, videoSource } = client.media.setupData()
				await client.setMic(audioSource)
				await client.setCamera(videoSource)
				}

				/**
				* Change the publisher audio device
				*
				* @param deviceId Device identifier string
				*/
				async function setupSetAudioDevice(deviceId) {
				return await client.media.setupSetAudio(deviceId)
				}

				/**
				* Change the publisher video device
				*
				* @param deviceId Device identifier string
				*/
				async function setupSetVideoDevice(deviceId) {
				return await client.media.setupSetVideo(deviceId)
				}

				/**
				* Setup the chat UI
				*/
				function initChat() {
				// Handle arriving chat messages
				client.on('chatMessage', pushChatMessage)

				// The UI elements are created in the vue template
				// Here we add a logic for how they work

				const chat = $(sessionData.chatElement).find('.chat').get(0)
				const textarea = $(sessionData.chatElement).find('textarea')
				const button = $(sessionData.menuElement).find('.link-chat')

				textarea.on('keydown', e => {
				if (e.keyCode == 13 && !e.shiftKey) {
				if (textarea.val().length) {
				client.chatMessage(textarea.val())
				textarea.val('')
				}

				return false
				}
				})

				// Add an element for the count of unread messages on the chat button
				button.append('<span class="badge bg-dark blinker">')
				.on('click', () => {
				button.find('.badge').text('')
				chatCount = 0
				// When opening the chat scroll it to the bottom, or we shouldn't?
				scrollStop = false
				chat.scrollTop = chat.scrollHeight
				})

				$(chat).on('scroll', event => {
				// Detect manual scrollbar moves, disable auto-scrolling until
				// the scrollbar is positioned on the element bottom again
				scrollStop = chat.scrollTop + chat.offsetHeight < chat.scrollHeight
				})
				}

				/**
				* Add a message to the chat
				*
				* @param data Object with a message, nickname, id (of the connection, empty for self)
				*/
				function pushChatMessage(data) {
				let message = $('<span>').text(data.message).text() // make the message secure

				// Format the message, convert emails and urls to links
				message = anchorme({
				input: message,
				options: {
				attributes: {
				target: "_blank"
				},
				// any link above 20 characters will be truncated
				// to 20 characters and ellipses at the end
				truncate: 20,
				// characters will be taken out of the middle
				middleTruncation: true
				}
				// TODO: anchorme is extensible, we could support
				// github/phabricator's markup e.g. backticks for code samples
				})

				message = message.replace(/\r?\n/, '<br>')

				// Display the message
				let chat = $(sessionData.chatElement).find('.chat')
				let box = chat.find('.message').last()

				message = $('<div>').html(message)

				message.find('a').attr('rel', 'noreferrer')

				if (box.length && box.data('id') == data.peerId) {
				// A message from the same user as the last message, no new box needed
				message.appendTo(box)
				} else {
				box = $('<div class="message">').data('id', data.peerId)
				.append($('<div class="nickname">').text(data.nickname \|\| ''))
				.append(message)
				.appendTo(chat)

				if (data.isSelf) {
				box.addClass('self')
				}
				}

				// Count unread messages
				if (!$(sessionData.chatElement).is('.open')) {
				if (!data.isSelf) {
				chatCount++
				}
				} else {
				chatCount = 0
				}

				$(sessionData.menuElement).find('.link-chat .badge').text(chatCount ? chatCount : '')

				// Scroll the chat element to the end
				if (!scrollStop) {
				chat.get(0).scrollTop = chat.get(0).scrollHeight
				}
				}

				/**
				* Switch interpreted language channel
				*
				* @param channel Two-letter language code
				*/
				function switchChannel(channel) {
				client.setLanguageChannel(channel)
				}

				/**
				* Mute/Unmute audio for current session publisher
				*/
				async function switchAudio() {
				const isActive = client.micStatus()

				if (isActive) {
				return await client.micMute()
				} else {
				return await client.micUnmute()
				}
				}

				/**
				* Mute/Unmute video for current session publisher
				*/
				async function switchVideo() {
				const isActive = client.camStatus()

				if (isActive) {
				return await client.camMute()
				} else {
				return await client.camUnmute()
				}
				}

				/**
				* Switch on/off screen sharing
				*/
				async function switchScreen() {
				const isActive = client.screenStatus()

				if (isActive) {
				return await client.screenUnshare()
				} else {
				return await client.screenShare()
				}
				}

				/**
				* Detect if screen sharing is supported by the browser
				*/
				function isScreenSharingSupported() {
				return !!(navigator.mediaDevices && navigator.mediaDevices.getDisplayMedia)
				}

				/**
				* Handler for Hand-Up "signal"
				*/
				function peerHandUp(peer) {
				let element = $(nicknameWidget(peer))

				participantUpdate(element, peer)

				element.attr('id', 'qa' + peer.id).appendTo($(sessionData.queueElement).show())

				setTimeout(() => element.addClass('wiggle'), 50)
				}

				/**
				* Handler for Hand-Down "signal"
				*/
				function peerHandDown(peer) {
				let list = $(sessionData.queueElement)

				list.find('#qa' + peer.id).remove()

				if (!list.find('.meet-nickname').length) {
				list.hide()
				}
				}

				/**
				* Update participant nickname in the UI
				*
				* @param nickname Nickname
				* @param peerId Connection identifier of the user
				*/
				function nicknameUpdate(nickname, peerId) {
				if (peerId) {
				$(sessionData.chatElement).find('.chat').find('.message').each(function() {
				let elem = $(this)
				if (elem.data('id') == peerId) {
				elem.find('.nickname').text(nickname \|\| '')
				}
				})

				$(sessionData.queueElement).find('#qa' + peerId + ' .content').text(nickname \|\| '')

				// Also update the nickname for the shared screen as we do not call
				// participantUpdate() for this element
				$('#screen-' + peerId).find('.meet-nickname .content').text(nickname \|\| '')
				}
				}

				/**
				* Create a participant element in the matrix. Depending on the peer role
				* parameter it will be a video element wrapper inside the matrix or a simple
				* tag-like element on the subscribers list.
				*
				* @param params Peer metadata/params
				* @param content Optional content to prepend to the element, e.g. video element
				*
				* @return The element
				*/
				function participantCreate(params, content) {
				let element

				if ((!params.language && params.role & Roles.PUBLISHER) \|\| params.role & Roles.SCREEN) {
				// publishers and shared screens
				element = publisherCreate(params, content)
				} else {
				// subscribers and language interpreters
				element = subscriberCreate(params, content)
				}

				setTimeout(resize, 50)

				return element
				}

				/**
				* Create a <video> element wrapper with controls
				*
				* @param params Connection metadata/params
				* @param content Optional content to prepend to the element
				*/
				function publisherCreate(params, content) {
				let isScreen = params.role & Roles.SCREEN

				// Create the element
				let wrapper = $(
				'<div class="meet-video">'
				+ svgIcon('user', 'fas', 'watermark')
				+ '<div class="controls">'
				+ '<button type="button" class="btn btn-link link-setup hidden" title="' + $t('meet.media-setup') + '">' + svgIcon('cog') + '</button>'
				+ '<div class="volume hidden"><input type="range" min="0" max="1" step="0.1" /></div>'
				+ '<button type="button" class="btn btn-link link-audio hidden" title="' + $t('meet.menu-audio-mute') + '">' + svgIcon('volume-mute') + '</button>'
				+ '<button type="button" class="btn btn-link link-fullscreen closed hidden" title="' + $t('meet.menu-fullscreen') + '">' + svgIcon('expand') + '</button>'
				+ '<button type="button" class="btn btn-link link-fullscreen open hidden" title="' + $t('meet.menu-fullscreen') + '">' + svgIcon('compress') + '</button>'
				+ '</div>'
				+ '<div class="status">'
				+ '<span class="bg-warning status-audio hidden">' + svgIcon('microphone-slash') + '</span>'
				+ '<span class="bg-warning status-video hidden">' + svgIcon('video-slash') + '</span>'
				+ '</div>'
				+ '</div>'
				)

				// Append the nickname widget
				wrapper.find('.controls').before(nicknameWidget(params))

				if (content) {
				wrapper.prepend(content)
				}

				if (isScreen) {
				wrapper.addClass('screen')
				}

				if (params.isSelf) {
				wrapper.find('.link-setup').removeClass('hidden').on('click', () => sessionData.onMediaSetup())
				} else if (!isScreen) {
				let volumeInput = wrapper.find('.volume input')
				let audioButton = wrapper.find('.link-audio')
				let inVolume = false
				let hideVolumeTimeout
				let hideVolume = () => {
				if (inVolume) {
				hideVolumeTimeout = setTimeout(hideVolume, 1000)
				} else {
				volumeInput.parent().addClass('hidden')
				}
				}
				let setVolume = (video, volume) => {
				video.volume = volume
				video.muted = volume == 0
				audioButton[video.muted ? 'addClass' : 'removeClass']('text-danger')
				client[video.muted ? 'peerMicMute' : 'peerMicUnmute'](params.id)
				}

				// Enable and set up the audio mute button
				audioButton.removeClass('hidden')
				.on('click', e => {
				let video = wrapper.find('video')[0]

				setVolume(video, !video.muted ? 0 : 1)
				volumeInput.val(video.volume)
				})
				// Show the volume slider when mouse is over the audio mute/unmute button
				.on('mouseenter', () => {
				let video = wrapper.find('video')[0]

				clearTimeout(hideVolumeTimeout)
				volumeInput.parent().removeClass('hidden')
				volumeInput.val(video.volume)
				})
				.on('mouseleave', () => {
				hideVolumeTimeout = setTimeout(hideVolume, 1000)
				})

				// Set up the audio volume control
				volumeInput
				.on('mouseenter', () => { inVolume = true })
				.on('mouseleave', () => { inVolume = false })
				.on('change input', () => {
				setVolume(wrapper.find('video')[0], volumeInput.val())
				})
				}

				participantUpdate(wrapper, params)

				// Fullscreen control
				if (document.fullscreenEnabled) {
				wrapper.find('.link-fullscreen.closed').removeClass('hidden')
				.on('click', () => {
				wrapper.get(0).requestFullscreen()
				})

				wrapper.find('.link-fullscreen.open')
				.on('click', () => {
				document.exitFullscreen()
				})

				wrapper.on('fullscreenchange', () => {
				// const enabled = document.fullscreenElement
				wrapper.find('.link-fullscreen').toggleClass('hidden')
				})
				}

				// Remove the subscriber element, if exists
				$('#subscriber-' + params.id).remove()

				let prio = params.isSelf \|\| (isScreen && !$(publishersContainer).children('.screen').length)

				return wrapper[prio ? 'prependTo' : 'appendTo'](publishersContainer)
				.attr('id', (isScreen ? 'screen-' : 'publisher-') + params.id)
				.get(0)
				}

				/**
				* Update the publisher/subscriber element controls
				*
				* @param wrapper The wrapper element
				* @param params Peer metadata/params
				*/
				function participantUpdate(wrapper, params) {
				const element = $(wrapper)
				const isSelf = params.isSelf
				const rolePublisher = params.role & Roles.PUBLISHER
				const roleModerator = params.role & Roles.MODERATOR
				const roleScreen = params.role & Roles.SCREEN
				const roleOwner = params.role & Roles.OWNER
				const roleInterpreter = rolePublisher && !!params.language
				const audioActive = roleScreen ? true : params.audioActive
				const videoActive = roleScreen ? true : params.videoActive

				element.find('.status-audio')[audioActive ? 'addClass' : 'removeClass']('hidden')
				element.find('.status-video')[videoActive ? 'addClass' : 'removeClass']('hidden')
				element.find('.meet-nickname > .content').text(params.nickname \|\| '')

				if (isSelf) {
				element.addClass('self')
				} else if (!roleScreen) {
				element.find('.link-audio').removeClass('hidden')
				}

				const isModerator = peers[selfId] && peers[selfId].role & Roles.MODERATOR
				const withPerm = isModerator && !roleScreen && !(roleOwner && !isSelf)
				const withMenu = isSelf \|\| (isModerator && !roleOwner)

				if (isModerator) {
				element.addClass('moderated')
				}

				// TODO: This probably could be better done with css
				let elements = {
				'.dropdown-menu': withMenu,
				'.permissions': withPerm,
				'.interpreting': withPerm && rolePublisher,
				'svg.moderator': roleModerator,
				'svg.user': !roleModerator && !roleInterpreter,
				'svg.interpreter': !roleModerator && roleInterpreter
				}

				Object.keys(elements).forEach(key => {
				element.find(key)[elements[key] ? 'removeClass' : 'addClass']('hidden')
				})

				element.find('.action-role-publisher input').prop('checked', rolePublisher)
				element.find('.action-role-moderator input').prop('checked', roleModerator)
				.prop('disabled', roleOwner)

				element.find('.interpreting select').val(roleInterpreter ? params.language : '')
				}

				/**
				* Update/refresh state of all participants' elements
				*/
				function participantUpdateAll() {
				Object.keys(peers).forEach(peerId => {
				const peer = peers[peerId]
				participantUpdate(peer.element, peer)
				})
				}

				/**
				* Create a tag-like element for a subscriber participant
				*
				* @param params Connection metadata/params
				* @param content Optional content to prepend to the element
				*/
				function subscriberCreate(params, content) {
				// Create the element
				let wrapper = $('<div class="meet-subscriber">').append(nicknameWidget(params))

				if (content) {
				wrapper.prepend(content)
				}

				participantUpdate(wrapper, params)

				// Two event handlers below fix the dropdown in the subscribers list.
				// Normally it gets hidden because of the overflow/height of the container.
				// FIXME: I think it wasn't needed in BS4, but it's a problem with BS5.
				const nickname = wrapper.children('.dropdown')[0]
				nickname.addEventListener('show.bs.dropdown', () => {
				$(subscribersContainer).css({
				'overflow-y': 'unset',
				height: $(subscribersContainer).height() + 'px'
				})
				})
				nickname.addEventListener('hide.bs.dropdown', () => {
				$(subscribersContainer).css({
				'overflow-y': 'auto',
				height: 'unset'
				})
				})

				return wrapper[params.isSelf ? 'prependTo' : 'appendTo'](subscribersContainer)
				.attr('id', 'subscriber-' + params.id)
				.get(0)
				}

				/**
				* Create a tag-like nickname widget
				*
				* @param object params Peer metadata/params
				*/
				function nicknameWidget(params) {
				let languages = []

				// Append languages selection options
				Object.keys(sessionData.languages).forEach(code => {
				languages.push(`<option value="${code}">${$t(sessionData.languages[code])}</option>`)
				})

				// Create the element
				let element = $(
				'<div class="dropdown">'
				+ '<a href="#" class="meet-nickname btn" aria-haspopup="true" aria-expanded="false" role="button">'
				+ '<span class="content"></span>'
				+ '<span class="icon">'
				+ svgIcon('user', null, 'user')
				+ svgIcon('crown', null, 'moderator hidden')
				+ svgIcon('headphones', null, 'interpreter hidden')
				+ '</span>'
				+ '</a>'
				+ '<div class="dropdown-menu">'
				+ '<a class="dropdown-item action-nickname" href="#">Nickname</a>'
				+ '<a class="dropdown-item action-dismiss" href="#">Dismiss</a>'
				+ '<div class="dropdown-divider permissions"></div>'
				+ '<div class="permissions">'
				+ '<h6 class="dropdown-header">' + $t('meet.perm') + '</h6>'
				+ '<label class="dropdown-item action-role-publisher form-check form-switch">'
				+ '<input type="checkbox" class="form-check-input">'
				+ ' <span class="form-check-label">' + $t('meet.perm-av') + '</span>'
				+ '</label>'
				+ '<label class="dropdown-item action-role-moderator form-check form-switch">'
				+ '<input type="checkbox" class="form-check-input">'
				+ ' <span class="form-check-label">' + $t('meet.perm-mod') + '</span>'
				+ '</label>'
				+ '</div>'
				+ '<div class="dropdown-divider interpreting"></div>'
				+ '<div class="interpreting">'
				+ '<h6 class="dropdown-header">' + $t('meet.lang-int') + '</h6>'
				+ '<div class="ps-3 pe-3"><select class="form-select">'
				+ '<option value="">- ' + $t('form.none') + ' -</option>'
				+ languages.join('')
				+ '</select></div>'
				+ '</div>'
				+ '</div>'
				+ '</div>'
				)

				let nickname = element.find('.meet-nickname')
				.addClass('btn btn-outline-' + (params.isSelf ? 'primary' : 'secondary'))
				.attr({title: $t('meet.menu-options'), 'data-bs-toggle': 'dropdown'})

				const dropdown = new Dropdown(nickname[0], { boundary: container.parentNode })

				if (params.isSelf) {
				// Add events for nickname change
				let editable = element.find('.content')[0]
				let editableEnable = () => {
				editable.contentEditable = true
				editable.focus()
				}
				let editableUpdate = () => {
				// Skip redundant update on blur, if it was already updated
				if (editable.contentEditable !== 'false') {
				editable.contentEditable = false
				client.setNickname(editable.innerText)
				}
				}

				element.find('.action-nickname').on('click', editableEnable)
				element.find('.action-dismiss').remove()

				$(editable).on('blur', editableUpdate)
				.on('keydown', e => {
				// Enter or Esc
				if (e.keyCode == 13 \|\| e.keyCode == 27) {
				editableUpdate()
				return false
				}

				// Do not propagate the event, so it does not interfere with our
				// keyboard shortcuts
				e.stopPropagation()
				})
				} else {
				element.find('.action-nickname').remove()

				element.find('.action-dismiss').on('click', () => {
				client.kickPeer(params.id)
				})
				}

				// Don't close the menu on permission change
				element.find('.dropdown-menu > label').on('click', e => { e.stopPropagation() })

				element.find('.action-role-publisher input').on('change', e => {
				client[e.target.checked ? 'addRole' : 'removeRole'](params.id, Roles.PUBLISHER)
				})

				element.find('.action-role-moderator input').on('change', e => {
				client[e.target.checked ? 'addRole' : 'removeRole'](params.id, Roles.MODERATOR)
				})

				element.find('.interpreting select')
				.on('change', e => {
				const language = $(e.target).val()
				client.setLanguage(params.id, language)
				dropdown.hide()
				})
				.on('click', e => {
				// Prevents from closing the dropdown menu on click
				e.stopPropagation()
				})

				return element.get(0)
				}

				/**
				* Window onresize event handler (updates room layout)
				*/
				function resize() {
				if (publishersContainer) {
				updateLayout()
				}

				$(container).parent()[window.screen.width <= 768 ? 'addClass' : 'removeClass']('mobile')
				}

				/**
				* Update the room "matrix" layout
				*/
				function updateLayout() {
				let publishers = $(publishersContainer).find('.meet-video')
				let numOfVideos = publishers.length

				if (sessionData && sessionData.counterElement) {
				sessionData.counterElement.innerHTML = Object.keys(peers).length
				}

				if (!numOfVideos) {
				subscribersContainer.style.minHeight = 'auto'
				return
				}

				// Note: offsetHeight/offsetWidth return rounded values, but for proper matrix
				// calculations we need more precision, therefore we use getBoundingClientRect()

				let allHeight = container.offsetHeight
				let scrollHeight = subscribersContainer.scrollHeight
				let bcr = publishersContainer.getBoundingClientRect()
				let containerWidth = bcr.width
				let containerHeight = bcr.height
				let limit = Math.ceil(allHeight * 0.25) // max subscribers list height

				// Fix subscribers list height
				if (subscribersContainer.offsetHeight <= scrollHeight) {
				limit = Math.min(scrollHeight, limit)
				subscribersContainer.style.minHeight = limit + 'px'
				containerHeight = allHeight - limit
				} else {
				subscribersContainer.style.minHeight = 'auto'
				}

				let css, rows, cols, height, padding = 0

				// Make the first screen sharing tile big
				let screenVideo = publishers.filter('.screen').find('video').get(0)

				if (screenVideo) {
				const element = screenVideo.parentNode
				const peerId = element.id.replace(/^screen-/, '')
				const peer = peers[peerId]

				// We know the shared screen video dimensions, we can calculate
				// width/height of the tile in the matrix
				if (peer && peer.screenWidth) {
				let screenWidth = peer.screenWidth
				let screenHeight = containerHeight

				// TODO: When the shared window is minimized the width/height is set to 1 (or 2)
				// - at least on my system. We might need to handle this case nicer. Right now
				// it create a 1-2px line on the left of the matrix - not a big issue.
				// TODO: Make the 0.666 factor bigger for wide screen and small number of participants?
				let maxWidth = Math.ceil(containerWidth * 0.666)

				if (screenWidth > maxWidth) {
				screenWidth = maxWidth
				}

				// Set the tile position and size
				$(element).css({
				width: screenWidth + 'px',
				height: screenHeight + 'px',
				position: 'absolute',
				top: 0,
				left: 0
				})

				padding = screenWidth + 'px'

				// Now the estate for the rest of participants is what's left on the right side
				containerWidth -= screenWidth
				publishers = publishers.not(element)
				numOfVideos -= 1
				}
				}

				// Compensate the shared screen estate with a padding
				$(publishersContainer).css('padding-left', padding)

				const factor = containerWidth / containerHeight

				if (factor >= 16/9) {
				if (numOfVideos <= 3) {
				rows = 1
				} else if (numOfVideos <= 8) {
				rows = 2
				} else if (numOfVideos <= 15) {
				rows = 3
				} else if (numOfVideos <= 20) {
				rows = 4
				} else {
				rows = 5
				}

				cols = Math.ceil(numOfVideos / rows)
				} else {
				if (numOfVideos == 1) {
				cols = 1
				} else if (numOfVideos <= 4) {
				cols = 2
				} else if (numOfVideos <= 9) {
				cols = 3
				} else if (numOfVideos <= 16) {
				cols = 4
				} else if (numOfVideos <= 25) {
				cols = 5
				} else {
				cols = 6
				}

				rows = Math.ceil(numOfVideos / cols)

				if (rows < cols && containerWidth < containerHeight) {
				cols = rows
				rows = Math.ceil(numOfVideos / cols)
				}
				}

				// console.log('factor=' + factor, 'num=' + numOfVideos, 'cols = '+cols, 'rows=' + rows)

				// Update all tiles (except the main shared screen) in the matrix
				publishers.css({
				width: (containerWidth / cols) + 'px',
				// Height must be in pixels to make object-fit:cover working
				height: (containerHeight / rows) + 'px'
				})
				}

				/**
				* Create an svg element (string) for a FontAwesome icon
				*
				* @todo Find if there's a "official" way to do this
				*/
				function svgIcon(name, type, className) {
				// Note: the library will contain definitions for all icons registered elswhere
				const icon = library.definitions[type \|\| 'fas'][name]

				let attrs = {
				'class': 'svg-inline--fa',
				'aria-hidden': true,
				focusable: false,
				role: 'img',
				xmlns: 'http://www.w3.org/2000/svg',
				viewBox: `0 0 ${icon[0]} ${icon[1]}`
				}

				if (className) {
				attrs['class'] += ' ' + className
				}

				return $(`<svg><path fill="currentColor" d="${icon[4]}"></path></svg>`)
				.attr(attrs)
				.get(0).outerHTML
				}
				}

				export { Room }