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 { withLayoutContext } from '/imports/ui/components/layout/context';

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

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

  return {
    swapLayout: props.swapLayout,
    streams,
    totalNumberOfStreams,
    isUserLocked: VideoService.isUserLocked(),
    currentVideoPageIndex: VideoService.getCurrentVideoPageIndex(),
  };
})( withLayoutContext(VideoProviderContainer));