bigbluebutton-Github/bigbluebutton-html5/imports/ui/components/video-provider/container.jsx

import React from 'react';
import { withTracker } from 'meteor/react-meteor-data';
import VideoProvider from './component';
import VideoService from './service';
import { sortVideoStreams } from '/imports/ui/components/video-provider/stream-sorting';

const { defaultSorting: DEFAULT_SORTING } = Meteor.settings.public.kurento.cameraSortingModes;

const VideoProviderContainer = ({ children, ...props }) => {
  const { streams, isGridEnabled } = props;
  return (!streams.length && !isGridEnabled ? null : <VideoProvider {...props}>{children}</VideoProvider>);
};

export default withTracker(({ swapLayout, ...rest }) => {
  // getVideoStreams returns a dictionary consisting of:
  // {
  //  streams: array of mapped streams
  //  totalNumberOfStreams: total number of shared streams in the server
  // }
  const {
    streams,
    gridUsers,
    totalNumberOfStreams,
  } = VideoService.getVideoStreams();

  let usersVideo = streams;

  if(gridUsers.length > 0) {
    const items = usersVideo.concat(gridUsers);
    usersVideo = sortVideoStreams(items, DEFAULT_SORTING);
  }

  return {
    swapLayout,
    streams: usersVideo,
    totalNumberOfStreams,
    isUserLocked: VideoService.isUserLocked(),
    currentVideoPageIndex: VideoService.getCurrentVideoPageIndex(),
    isMeteorConnected: Meteor.status().connected,
    ...rest,
  };
})(VideoProviderContainer);