ref(modules/UI): remove events system.

Many of the events are not used at all or used only on one place. For the rest of them the listeners were added 2 times on promoted visitors and not cleaned at all.

conference.js

 
 import { jitsiLocalStorage } from '@jitsi/js-utils';
 import Logger from '@jitsi/logger';
-import EventEmitter from 'events';
 
 import { ENDPOINT_TEXT_MESSAGE_NAME } from './modules/API/constants';
 import { AUDIO_ONLY_SCREEN_SHARE_NO_TRACK } from './modules/UI/UIErrors';
 import { createRnnoiseProcessor } from './react/features/stream-effects/rnnoise';
 import { handleToggleVideoMuted } from './react/features/toolbox/actions.any';
 import { muteLocal } from './react/features/video-menu/actions.any';
-import UIEvents from './service/UI/UIEvents';
 
 const logger = Logger.getLogger(__filename);
 
-const eventEmitter = new EventEmitter();
-
 let room;
 
 /*
             JitsiE2ePingEvents.E2E_RTT_CHANGED,
             (...args) => APP.store.dispatch(e2eRttChanged(...args)));
 
-        APP.UI.addListener(UIEvents.AUDIO_MUTED, muted => {
-            this.muteAudio(muted);
-        });
-        APP.UI.addListener(UIEvents.VIDEO_MUTED, (muted, showUI = false) => {
-            this.muteVideo(muted, showUI);
-        });
-
         room.addCommandListener(this.commands.defaults.ETHERPAD,
             ({ value }) => {
                 APP.UI.initEtherpad(value);
             }
         );
 
-        APP.UI.addListener(UIEvents.EMAIL_CHANGED,
-            this.changeLocalEmail.bind(this));
         room.addCommandListener(this.commands.defaults.EMAIL, (data, from) => {
             APP.store.dispatch(participantUpdated({
                 conference: room,
                     }));
             });
 
-        APP.UI.addListener(UIEvents.NICKNAME_CHANGED,
-            this.changeLocalDisplayName.bind(this));
-
         room.on(
             JitsiConferenceEvents.START_MUTED_POLICY_CHANGED,
             ({ audio, video }) => {
                 }, NOTIFICATION_TIMEOUT_TYPE.STICKY));
             }
         );
+    },
 
-        // call hangup
-        APP.UI.addListener(UIEvents.HANGUP, () => {
-            this.hangup(true);
-        });
-
-        APP.UI.addListener(
-            UIEvents.VIDEO_DEVICE_CHANGED,
-            cameraDeviceId => {
-                const videoWasMuted = this.isLocalVideoMuted();
-                const localVideoTrack = getLocalJitsiVideoTrack(APP.store.getState());
+    /**
+     * Handles audio device changes.
+     *
+     * @param {string} cameraDeviceId - The new device id.
+     * @returns {Promise}
+     */
+    async onAudioDeviceChanged(micDeviceId) {
+        const audioWasMuted = this.isLocalAudioMuted();
+
+        // Disable noise suppression if it was enabled on the previous track.
+        await APP.store.dispatch(setNoiseSuppressionEnabled(false));
+
+        // When the 'default' mic needs to be selected, we need to pass the real device id to gUM instead of
+        // 'default' in order to get the correct MediaStreamTrack from chrome because of the following bug.
+        // https://bugs.chromium.org/p/chromium/issues/detail?id=997689.
+        const isDefaultMicSelected = micDeviceId === 'default';
+        const selectedDeviceId = isDefaultMicSelected
+            ? getDefaultDeviceId(APP.store.getState(), 'audioInput')
+            : micDeviceId;
+
+        logger.info(`Switching audio input device to ${selectedDeviceId}`);
+        sendAnalytics(createDeviceChangedEvent('audio', 'input'));
+        createLocalTracksF({
+            devices: [ 'audio' ],
+            micDeviceId: selectedDeviceId
+        })
+        .then(([ stream ]) => {
+            // if audio was muted before changing the device, mute
+            // with the new device
+            if (audioWasMuted) {
+                return stream.mute()
+                    .then(() => stream);
+            }
 
-                if (localVideoTrack?.getDeviceId() === cameraDeviceId) {
-                    return;
-                }
+            return stream;
+        })
+        .then(async stream => {
+            await this._maybeApplyAudioMixerEffect(stream);
 
-                sendAnalytics(createDeviceChangedEvent('video', 'input'));
+            return this.useAudioStream(stream);
+        })
+        .then(() => {
+            const localAudio = getLocalJitsiAudioTrack(APP.store.getState());
 
-                createLocalTracksF({
-                    devices: [ 'video' ],
-                    cameraDeviceId
-                })
-                .then(([ stream ]) => {
-                    // if we are in audio only mode or video was muted before
-                    // changing device, then mute
-                    if (this.isAudioOnly() || videoWasMuted) {
-                        return stream.mute()
-                            .then(() => stream);
-                    }
+            if (localAudio && isDefaultMicSelected) {
+                // workaround for the default device to be shown as selected in the
+                // settings even when the real device id was passed to gUM because of the
+                // above mentioned chrome bug.
+                localAudio._realDeviceId = localAudio.deviceId = 'default';
+            }
+        })
+        .catch(err => {
+            logger.error(`Failed to switch to selected audio input device ${selectedDeviceId}, error=${err}`);
+            APP.store.dispatch(notifyMicError(err));
+        });
+    },
 
-                    return stream;
-                })
-                .then(stream => {
-                    logger.info(`Switching the local video device to ${cameraDeviceId}.`);
+    /**
+     * Handles video device changes.
+     *
+     * @param {string} cameraDeviceId - The new device id.
+     * @returns {void}
+     */
+    onVideoDeviceChanged(cameraDeviceId) {
+        const videoWasMuted = this.isLocalVideoMuted();
+        const localVideoTrack = getLocalJitsiVideoTrack(APP.store.getState());
 
-                    return this.useVideoStream(stream);
-                })
-                .catch(error => {
-                    logger.error(`Failed to switch to selected camera:${cameraDeviceId}, error:${error}`);
+        if (localVideoTrack?.getDeviceId() === cameraDeviceId) {
+            return;
+        }
 
-                    return APP.store.dispatch(notifyCameraError(error));
-                });
+        sendAnalytics(createDeviceChangedEvent('video', 'input'));
+
+        createLocalTracksF({
+            devices: [ 'video' ],
+            cameraDeviceId
+        })
+        .then(([ stream ]) => {
+            // if we are in audio only mode or video was muted before
+            // changing device, then mute
+            if (this.isAudioOnly() || videoWasMuted) {
+                return stream.mute()
+                    .then(() => stream);
             }
-        );
 
-        APP.UI.addListener(
-            UIEvents.AUDIO_DEVICE_CHANGED,
-            async micDeviceId => {
-                const audioWasMuted = this.isLocalAudioMuted();
-
-                // Disable noise suppression if it was enabled on the previous track.
-                await APP.store.dispatch(setNoiseSuppressionEnabled(false));
-
-                // When the 'default' mic needs to be selected, we need to pass the real device id to gUM instead of
-                // 'default' in order to get the correct MediaStreamTrack from chrome because of the following bug.
-                // https://bugs.chromium.org/p/chromium/issues/detail?id=997689.
-                const isDefaultMicSelected = micDeviceId === 'default';
-                const selectedDeviceId = isDefaultMicSelected
-                    ? getDefaultDeviceId(APP.store.getState(), 'audioInput')
-                    : micDeviceId;
-
-                logger.info(`Switching audio input device to ${selectedDeviceId}`);
-                sendAnalytics(createDeviceChangedEvent('audio', 'input'));
-                createLocalTracksF({
-                    devices: [ 'audio' ],
-                    micDeviceId: selectedDeviceId
-                })
-                .then(([ stream ]) => {
-                    // if audio was muted before changing the device, mute
-                    // with the new device
-                    if (audioWasMuted) {
-                        return stream.mute()
-                            .then(() => stream);
-                    }
+            return stream;
+        })
+        .then(stream => {
+            logger.info(`Switching the local video device to ${cameraDeviceId}.`);
 
-                    return stream;
-                })
-                .then(async stream => {
-                    await this._maybeApplyAudioMixerEffect(stream);
+            return this.useVideoStream(stream);
+        })
+        .catch(error => {
+            logger.error(`Failed to switch to selected camera:${cameraDeviceId}, error:${error}`);
 
-                    return this.useAudioStream(stream);
-                })
-                .then(() => {
-                    const localAudio = getLocalJitsiAudioTrack(APP.store.getState());
-
-                    if (localAudio && isDefaultMicSelected) {
-                        // workaround for the default device to be shown as selected in the
-                        // settings even when the real device id was passed to gUM because of the
-                        // above mentioned chrome bug.
-                        localAudio._realDeviceId = localAudio.deviceId = 'default';
-                    }
-                })
-                .catch(err => {
-                    logger.error(`Failed to switch to selected audio input device ${selectedDeviceId}, error=${err}`);
-                    APP.store.dispatch(notifyMicError(err));
-                });
-            }
-        );
+            return APP.store.dispatch(notifyCameraError(error));
+        });
+    },
 
-        APP.UI.addListener(UIEvents.TOGGLE_AUDIO_ONLY, () => {
-            // Immediately update the UI by having remote videos and the large video update themselves.
-            const displayedUserId = APP.UI.getLargeVideoID();
+    /**
+     * Handles audio only changes.
+     */
+    onToggleAudioOnly() {
+        // Immediately update the UI by having remote videos and the large video update themselves.
+        const displayedUserId = APP.UI.getLargeVideoID();
 
-            if (displayedUserId) {
-                APP.UI.updateLargeVideo(displayedUserId, true);
-            }
-        });
+        if (displayedUserId) {
+            APP.UI.updateLargeVideo(displayedUserId, true);
+        }
     },
 
     /**
                 this.deviceChangeListener);
         }
 
-        APP.UI.removeAllListeners();
-
         let feedbackResultPromise = Promise.resolve({});
 
         if (requestFeedback) {
         room.sendEndpointMessage(to, payload);
     },
 
-    /**
-     * Adds new listener.
-     * @param {String} eventName the name of the event
-     * @param {Function} listener the listener.
-     */
-    addListener(eventName, listener) {
-        eventEmitter.addListener(eventName, listener);
-    },
-
-    /**
-     * Removes listener.
-     * @param {String} eventName the name of the event that triggers the
-     * listener
-     * @param {Function} listener the listener.
-     */
-    removeListener(eventName, listener) {
-        eventEmitter.removeListener(eventName, listener);
-    },
-
-    /**
-     * Changes the display name for the local user
-     * @param nickname {string} the new display name
-     */
-    changeLocalDisplayName(nickname = '') {
-        const formattedNickname = getNormalizedDisplayName(nickname);
-
-        APP.store.dispatch(updateSettings({
-            displayName: formattedNickname
-        }));
-    },
-
     /**
      * Callback invoked by the external api create or update a direct connection
      * from the local client to an external client.

modules/API/API.js

 import {
     addStageParticipant,
     resizeFilmStrip,
+    setFilmstripVisible,
     setVolume,
     togglePinStageParticipant
 } from '../../react/features/filmstrip/actions.web';
 import { isScreenAudioSupported } from '../../react/features/screen-share/functions';
 import { toggleScreenshotCaptureSummary } from '../../react/features/screenshot-capture/actions';
 import { isScreenshotCaptureEnabled } from '../../react/features/screenshot-capture/functions';
+import { changeLocalDisplayName } from '../../react/features/settings/actions.web';
 import SettingsDialog from '../../react/features/settings/components/web/SettingsDialog';
 import { SETTINGS_TABS } from '../../react/features/settings/constants';
 import { playSharedVideo, stopSharedVideo } from '../../react/features/shared-video/actions.any';
         },
         'display-name': displayName => {
             sendAnalytics(createApiEvent('display.name.changed'));
-            APP.conference.changeLocalDisplayName(displayName);
+            APP.store.dispatch(changeLocalDisplayName(displayName));
         },
         'local-subject': localSubject => {
             sendAnalytics(createApiEvent('local.subject.changed'));
         },
         'toggle-film-strip': () => {
             sendAnalytics(createApiEvent('film.strip.toggled'));
-            APP.UI.toggleFilmstrip();
+            const { visible } = APP.store.getState()['features/filmstrip'];
+
+            APP.store.dispatch(setFilmstripVisible(!visible));
         },
 
         /*

modules/UI/UI.js

 const UI = {};
 
 import Logger from '@jitsi/logger';
-import EventEmitter from 'events';
 
 import {
     conferenceWillInit
 import { setColorAlpha } from '../../react/features/base/util/helpers';
 import { sanitizeUrl } from '../../react/features/base/util/uri';
 import { setDocumentUrl } from '../../react/features/etherpad/actions';
-import { setFilmstripVisible } from '../../react/features/filmstrip/actions.any';
 import {
     setNotificationsEnabled,
     showNotification
     setToolboxEnabled,
     showToolbox
 } from '../../react/features/toolbox/actions.web';
-import UIEvents from '../../service/UI/UIEvents';
 
 import EtherpadManager from './etherpad/Etherpad';
 import UIUtil from './util/UIUtil';
 
 const logger = Logger.getLogger(__filename);
 
-const eventEmitter = new EventEmitter();
-
-UI.eventEmitter = eventEmitter;
-
 let etherpadManager;
 
-const UIListeners = new Map([
-    [
-        UIEvents.ETHERPAD_CLICKED,
-        () => etherpadManager && etherpadManager.toggleEtherpad()
-    ], [
-        UIEvents.TOGGLE_FILMSTRIP,
-        () => UI.toggleFilmstrip()
-    ]
-]);
-
 /**
  * Indicates if we're currently in full screen mode.
  *
 };
 
 /**
- * Setup some UI event listeners.
+ * Handles etherpad click.
  */
-UI.registerListeners
-    = () => UIListeners.forEach((value, key) => UI.addListener(key, value));
+UI.onEtherpadClicked = function() {
+    etherpadManager && etherpadManager.toggleEtherpad();
+};
 
 /**
  *
     }
     logger.log('Etherpad is enabled');
 
-    etherpadManager = new EtherpadManager(eventEmitter);
+    etherpadManager = new EtherpadManager();
 
     const url = new URL(name, etherpadBaseUrl);
 
     }, NOTIFICATION_TIMEOUT_TYPE.SHORT));
 };
 
-/**
- * Toggles filmstrip.
- */
-UI.toggleFilmstrip = function() {
-    const { visible } = APP.store.getState()['features/filmstrip'];
-
-    APP.store.dispatch(setFilmstripVisible(!visible));
-};
-
 /**
  * Sets muted video state for participant
  */
 
 UI.updateLargeVideo = (id, forceUpdate) => VideoLayout.updateLargeVideo(id, forceUpdate);
 
-/**
- * Adds a listener that would be notified on the given type of event.
- *
- * @param type the type of the event we're listening for
- * @param listener a function that would be called when notified
- */
-UI.addListener = function(type, listener) {
-    eventEmitter.on(type, listener);
-};
-
-/**
- * Removes the all listeners for all events.
- *
- * @returns {void}
- */
-UI.removeAllListeners = function() {
-    eventEmitter.removeAllListeners();
-};
-
-/**
- * Emits the event of given type by specifying the parameters in options.
- *
- * @param type the type of the event we're emitting
- * @param options the parameters for the event
- */
-UI.emitEvent = (type, ...options) => eventEmitter.emit(type, ...options);
-
 // Used by torture.
 UI.showToolbar = timeout => APP.store.dispatch(showToolbox(timeout));
 

modules/UI/etherpad/Etherpad.js

     /**
      *
      */
-    constructor(eventEmitter) {
-        this.eventEmitter = eventEmitter;
+    constructor() {
         this.etherpad = null;
     }
 

react/features/base/audio-only/actions.ts

-// @ts-expect-error
-import UIEvents from '../../../../service/UI/UIEvents';
 import { createAudioOnlyChangedEvent } from '../../analytics/AnalyticsEvents';
 import { sendAnalytics } from '../../analytics/functions';
 import { IStore } from '../../app/types';
             if (typeof APP !== 'undefined') {
                 // TODO This should be a temporary solution that lasts only until video
                 // tracks and all ui is moved into react/redux on the web.
-                APP.UI.emitEvent(UIEvents.TOGGLE_AUDIO_ONLY, audioOnly);
+                APP.conference.onToggleAudioOnly();
             }
         }
     };

react/features/base/conference/actions.ts

-// @ts-expect-error
-import UIEvents from '../../../../service/UI/UIEvents';
 import { createStartMutedConfigurationEvent } from '../../analytics/AnalyticsEvents';
 import { sendAnalytics } from '../../analytics/functions';
 import { IReduxState, IStore } from '../../app/types';
                                 dispatch(setAudioMuted(false, true));
 
                                 // // FIXME: The old conference logic still relies on this event being emitted.
-                                typeof APP === 'undefined' || APP.UI.emitEvent(UIEvents.AUDIO_MUTED, false);
+                                typeof APP === 'undefined' || APP.conference.muteAudio(false);
                             }
                         }
 
                                 dispatch(setVideoMuted(false, VIDEO_MUTISM_AUTHORITY.USER, true));
 
                                 // // FIXME: The old conference logic still relies on this event being emitted.
-                                typeof APP === 'undefined' || APP.UI.emitEvent(UIEvents.VIDEO_MUTED, false);
+                                typeof APP === 'undefined' || APP.conference.muteVideo(false, false);
                             }
                         }
                     }

react/features/base/devices/middleware.web.ts

 import { AnyAction } from 'redux';
 
-// @ts-expect-error
-import UIEvents from '../../../../service/UI/UIEvents';
 import { IStore } from '../../app/types';
 import { processExternalDeviceRequest } from '../../device-selection/functions';
 import { showNotification, showWarningNotification } from '../../notifications/actions';
         if (isPrejoinPageVisible(store.getState())) {
             store.dispatch(replaceAudioTrackById(action.deviceId));
         } else {
-            APP.UI.emitEvent(UIEvents.AUDIO_DEVICE_CHANGED, action.deviceId);
+            APP.conference.onAudioDeviceChanged(action.deviceId);
         }
         break;
     case SET_VIDEO_INPUT_DEVICE: {
         if (isPrejoinPageVisible(store.getState())) {
             store.dispatch(replaceVideoTrackById(action.deviceId));
         } else {
-            APP.UI.emitEvent(UIEvents.VIDEO_DEVICE_CHANGED, action.deviceId);
+            APP.conference.onVideoDeviceChanged(action.deviceId);
         }
         break;
     }

react/features/base/participants/middleware.ts

 import { batch } from 'react-redux';
 import { AnyAction } from 'redux';
 
-// @ts-expect-error
-import UIEvents from '../../../../service/UI/UIEvents';
 import { IStore } from '../../app/types';
 import { approveParticipant } from '../../av-moderation/actions';
 import { UPDATE_BREAKOUT_ROOMS } from '../../breakout-rooms/actionTypes';
 import { CALLING, INVITED } from '../../presence-status/constants';
 import { RAISE_HAND_SOUND_ID } from '../../reactions/constants';
 import { RECORDING_OFF_SOUND_ID, RECORDING_ON_SOUND_ID } from '../../recording/constants';
+import { changeLocalDisplayName } from '../../settings/actions';
 import { APP_WILL_MOUNT, APP_WILL_UNMOUNT } from '../app/actionTypes';
 import { CONFERENCE_WILL_JOIN } from '../conference/actionTypes';
 import { forEachConference, getCurrentConference } from '../conference/functions';
             const participant = getLocalParticipant(store.getState());
 
             if (participant && participant.id === action.id) {
-                APP.UI.emitEvent(UIEvents.NICKNAME_CHANGED, action.name);
+                store.dispatch(changeLocalDisplayName(action.name));
             }
         }
 

react/features/conference/components/web/Conference.tsx

      */
     _start() {
         APP.UI.start();
-
-        APP.UI.registerListeners();
         APP.UI.bindEvents();
 
         FULL_SCREEN_EVENTS.forEach(name =>

react/features/etherpad/middleware.ts

-// @ts-expect-error
-import UIEvents from '../../../service/UI/UIEvents';
 import { CONFERENCE_JOIN_IN_PROGRESS } from '../base/conference/actionTypes';
 import { getCurrentConference } from '../base/conference/functions';
 import MiddlewareRegistry from '../base/redux/MiddlewareRegistry';
     }
     case TOGGLE_DOCUMENT_EDITING: {
         if (typeof APP !== 'undefined') {
-            APP.UI.emitEvent(UIEvents.ETHERPAD_CLICKED);
+            APP.UI.onEtherpadClicked();
         }
         break;
     }

react/features/room-lock/middleware.ts

 import { AnyAction } from 'redux';
 
-// @ts-expect-error
-import UIEvents from '../../../service/UI/UIEvents';
 import { IStore } from '../app/types';
 import {
     CONFERENCE_FAILED,
         return _conferenceJoined(store, next, action);
 
     case LOCK_STATE_CHANGED: {
-        // TODO Remove this logic when all components interested in the lock
-        // state change event are moved into react/redux.
-        if (typeof APP !== 'undefined') {
-            APP.UI.emitEvent(UIEvents.TOGGLE_ROOM_LOCK, action.locked);
-        }
-
         const previousLockedState = store.getState()['features/base/conference'].locked;
 
         const result = next(action);

react/features/settings/actions.native.ts

         }));
     };
 }
+
+/**
+* Changes the display name for the local user.
+*
+* @param {string} _nickname - The new display name.
+* @returns {Function}
+*/
+export function changeLocalDisplayName(_nickname = '') {
+    // not used on mobile.
+    return (_dispatch: IStore['dispatch'], _getState: IStore['getState']) => {
+        // no-op action.
+    };
+}

react/features/settings/actions.web.ts

 import { openDialog } from '../base/dialog/actions';
 import i18next from '../base/i18n/i18next';
 import { browser } from '../base/lib-jitsi-meet';
+import { getNormalizedDisplayName } from '../base/participants/functions';
 import { updateSettings } from '../base/settings/actions';
 import { getLocalVideoTrack } from '../base/tracks/functions.web';
 import { appendURLHashParam } from '../base/util/uri';
         const currentState = getProfileTabProps(getState());
 
         if (newState.displayName !== currentState.displayName) {
-            APP.conference.changeLocalDisplayName(newState.displayName);
+            dispatch(changeLocalDisplayName(newState.displayName));
         }
 
         if (newState.email !== currentState.email) {
     };
 }
 
+/**
+* Changes the display name for the local user.
+*
+* @param {string} nickname - The new display name.
+* @returns {Function}
+*/
+export function changeLocalDisplayName(nickname = '') {
+    return (dispatch: IStore['dispatch']) => {
+        const formattedNickname = getNormalizedDisplayName(nickname);
+
+        dispatch(updateSettings({ displayName: formattedNickname }));
+    };
+}
+
 /**
  * Submits the settings from the "Sounds" tab of the settings dialog.
  *

react/features/toolbox/actions.any.ts

-// @ts-expect-error
-import UIEvents from '../../../service/UI/UIEvents';
 import { VIDEO_MUTE, createToolbarEvent } from '../analytics/AnalyticsEvents';
 import { sendAnalytics } from '../analytics/functions';
 import { IStore } from '../app/types';
         // FIXME: The old conference logic still relies on this event being
         // emitted.
         typeof APP === 'undefined'
-            || APP.UI.emitEvent(UIEvents.VIDEO_MUTED, muted, showUI);
+            || APP.conference.muteVideo(muted, showUI);
 
     };
 }

react/features/video-menu/actions.any.ts

-// @ts-expect-error
-import UIEvents from '../../../service/UI/UIEvents';
 import {
     AUDIO_MUTE,
     VIDEO_MUTE,
             : setVideoMuted(enable, VIDEO_MUTISM_AUTHORITY.USER, /* ensureTrack */ true));
 
         // FIXME: The old conference logic still relies on this event being emitted.
-        typeof APP === 'undefined'
-            || APP.UI.emitEvent(isAudio ? UIEvents.AUDIO_MUTED : UIEvents.VIDEO_MUTED, enable);
+        if (typeof APP !== 'undefined') {
+            isAudio ? APP.conference.muteAudio(enable) : APP.conference.muteVideo(enable, false);
+        }
     };
 }
 

service/UI/UIEvents.js

-export default {
-    NICKNAME_CHANGED: 'UI.nickname_changed',
-
-    /**
-     * Notifies that local user changed email.
-     */
-    EMAIL_CHANGED: 'UI.email_changed',
-
-    /**
-     * Notifies that "start muted" settings changed.
-     */
-    AUDIO_MUTED: 'UI.audio_muted',
-    VIDEO_MUTED: 'UI.video_muted',
-    ETHERPAD_CLICKED: 'UI.etherpad_clicked',
-
-    /**
-     * Updates shared video with params: url, state, time(optional)
-     * Where url is the video link, state is stop/start/pause and time is the
-     * current video playing time.
-     */
-    TOGGLE_FULLSCREEN: 'UI.toogle_fullscreen',
-    FULLSCREEN_TOGGLED: 'UI.fullscreen_toggled',
-
-    /**
-     * Notifies that the audio only mode was toggled.
-     */
-    TOGGLE_AUDIO_ONLY: 'UI.toggle_audioonly',
-
-    /**
-     * Notifies that a command to toggle the filmstrip has been issued. The
-     * event may optionally specify a {Boolean} (primitive) value to assign to
-     * the visibility of the filmstrip (i.e. the event may act as a setter).
-     * The very toggling of the filmstrip may or may not occurred at the time
-     * of the receipt of the event depending on the position of the receiving
-     * event listener in relation to the event listener which carries out the
-     * command to toggle the filmstrip.
-     *
-     * @see {TOGGLED_FILMSTRIP}
-     */
-    TOGGLE_FILMSTRIP: 'UI.toggle_filmstrip',
-
-    HANGUP: 'UI.hangup',
-    VIDEO_DEVICE_CHANGED: 'UI.video_device_changed',
-    AUDIO_DEVICE_CHANGED: 'UI.audio_device_changed',
-
-    /**
-     * Notifies that the side toolbar container has been toggled. The actual
-     * event must contain the identifier of the container that has been toggled
-     * and information about toggle on or off.
-     */
-    SIDE_TOOLBAR_CONTAINER_TOGGLED: 'UI.side_container_toggled',
-
-    /**
-     * Notifies that the raise hand has been changed.
-     */
-    LOCAL_RAISE_HAND_CHANGED: 'UI.local_raise_hand_changed'
-};