import _ from 'lodash'; import { IStore } from '../../app/types'; import { getCurrentConference } from '../conference/functions'; import { getMultipleVideoSendingSupportFeatureFlag } from '../config/functions.any'; import StateListenerRegistry from '../redux/StateListenerRegistry'; import { createVirtualScreenshareParticipant, participantLeft } from './actions'; import { FakeParticipant } from './types'; StateListenerRegistry.register( /* selector */ state => state['features/base/tracks'], /* listener */(tracks, store) => _updateScreenshareParticipants(store) ); /** * Handles creating and removing virtual screenshare participants. * * @param {*} store - The redux store. * @returns {void} */ function _updateScreenshareParticipants({ getState, dispatch }: IStore) { const state = getState(); const conference = getCurrentConference(state); const tracks = state['features/base/tracks']; const { sortedRemoteVirtualScreenshareParticipants, localScreenShare } = state['features/base/participants']; const previousScreenshareSourceNames = [ ...sortedRemoteVirtualScreenshareParticipants.keys() ]; let newLocalSceenshareSourceName; const currentScreenshareSourceNames = tracks.reduce((acc: string[], track) => { if (track.videoType === 'desktop' && !track.jitsiTrack.isMuted()) { const sourceName: string = track.jitsiTrack.getSourceName(); if (track.local) { newLocalSceenshareSourceName = sourceName; } else { acc.push(sourceName); } } return acc; }, []); if (getMultipleVideoSendingSupportFeatureFlag(state)) { if (!localScreenShare && newLocalSceenshareSourceName) { dispatch(createVirtualScreenshareParticipant(newLocalSceenshareSourceName, true)); } if (localScreenShare && !newLocalSceenshareSourceName) { dispatch(participantLeft(localScreenShare.id, conference, { fakeParticipant: FakeParticipant.LocalScreenShare, isReplaced: undefined })); } } const removedScreenshareSourceNames = _.difference(previousScreenshareSourceNames, currentScreenshareSourceNames); const addedScreenshareSourceNames = _.difference(currentScreenshareSourceNames, previousScreenshareSourceNames); if (removedScreenshareSourceNames.length) { removedScreenshareSourceNames.forEach(id => dispatch(participantLeft(id, conference, { fakeParticipant: FakeParticipant.RemoteScreenShare, isReplaced: undefined }))); } if (addedScreenshareSourceNames.length) { addedScreenshareSourceNames.forEach(id => dispatch(createVirtualScreenshareParticipant(id, false))); } }