multiparty-meeting/app/lib/components/VideoContainers/PeerView.jsx

import React from 'react';
import PropTypes from 'prop-types';
import classnames from 'classnames';
import * as appPropTypes from '../appPropTypes';
import EditableInput from '../Controls/EditableInput';

export default class PeerView extends React.Component
{
	constructor(props)
	{
		super(props);

		this.state =
		{
			volume      : 0, // Integer from 0 to 10.,
			videoWidth  : null,
			videoHeight : null
		};

		// Latest received video track.
		// @type {MediaStreamTrack}
		this._audioTrack = null;

		// Latest received video track.
		// @type {MediaStreamTrack}
		this._videoTrack = null;

		// Periodic timer for showing video resolution.
		this._videoResolutionTimer = null;
	}

	render()
	{
		const {
			isMe,
			peer,
			volume,
			advancedMode,
			videoVisible,
			videoProfile,
			audioCodec,
			videoCodec,
			onChangeDisplayName
		} = this.props;

		const {
			videoWidth,
			videoHeight
		} = this.state;

		return (
			<div data-component='PeerView'>
				<div className='info'>
					<If condition={advancedMode}>
						<div className={classnames('media', { 'is-me': isMe })}>
							<div className='box'>
								<If condition={audioCodec}>
									<p className='codec'>{audioCodec}</p>
								</If>

								<If condition={videoCodec}>
									<p className='codec'>{videoCodec} {videoProfile}</p>
								</If>

								<If condition={(videoVisible && videoWidth !== null)}>
									<p className='resolution'>{videoWidth}x{videoHeight}</p>
								</If>
							</div>
						</div>
					</If>

					<div className={classnames('peer', { 'is-me': isMe })}>
						<Choose>
							<When condition={isMe}>
								<EditableInput
									value={peer.displayName}
									propName='displayName'
									className='display-name editable'
									classLoading='loading'
									classInvalid='invalid'
									shouldBlockWhileLoading
									editProps={{
										maxLength   : 20,
										autoCorrect : false,
										spellCheck  : false
									}}
									onChange={({ displayName }) => onChangeDisplayName(displayName)}
								/>
							</When>
							<Otherwise>
								<span className='display-name'>
									{peer.displayName}
								</span>
							</Otherwise>
						</Choose>

						<If condition={advancedMode}>
							<div className='row'>
								<span
									className={classnames('device-icon', peer.device.flag)}
								/>
								<span className='device-version'>
									{peer.device.name} {Math.floor(peer.device.version) || null}
								</span>
							</div>
						</If>
					</div>
				</div>

				<video
					ref='video'
					className={classnames({
						hidden  : !videoVisible,
						'is-me' : isMe,
						loading : videoProfile === 'none'
					})}
					autoPlay
					muted={isMe}
				/>

				<div className='volume-container'>
					<div className={classnames('bar', `level${volume}`)} />
				</div>
			</div>
		);
	}

	componentDidMount()
	{
		const { audioTrack, videoTrack } = this.props;

		this._setTracks(audioTrack, videoTrack);
	}

	componentWillUnmount()
	{
		clearInterval(this._videoResolutionTimer);
	}

	componentWillReceiveProps(nextProps)
	{
		const { audioTrack, videoTrack } = nextProps;

		this._setTracks(audioTrack, videoTrack);

	}

	_setTracks(audioTrack, videoTrack)
	{
		if (this._audioTrack === audioTrack && this._videoTrack === videoTrack)
			return;

		this._audioTrack = audioTrack;
		this._videoTrack = videoTrack;

		clearInterval(this._videoResolutionTimer);
		this._hideVideoResolution();

		const { video } = this.refs;

		if (audioTrack || videoTrack)
		{
			const stream = new MediaStream;

			if (audioTrack)
				stream.addTrack(audioTrack);

			if (videoTrack)
				stream.addTrack(videoTrack);

			video.srcObject = stream;

			if (videoTrack)
				this._showVideoResolution();
		}
		else
		{
			video.srcObject = null;
		}
	}

	_showVideoResolution()
	{
		this._videoResolutionTimer = setInterval(() =>
		{
			const { videoWidth, videoHeight } = this.state;
			const { video } = this.refs;

			// Don't re-render if nothing changed.
			if (video.videoWidth === videoWidth && video.videoHeight === videoHeight)
				return;

			this.setState(
				{
					videoWidth  : video.videoWidth,
					videoHeight : video.videoHeight
				});
		}, 1000);
	}

	_hideVideoResolution()
	{
		this.setState({ videoWidth: null, videoHeight: null });
	}
}

PeerView.propTypes =
{
	isMe : PropTypes.bool,
	peer : PropTypes.oneOfType(
		[ appPropTypes.Me, appPropTypes.Peer ]).isRequired,
	advancedMode        : PropTypes.bool,
	audioTrack          : PropTypes.any,
	volume              : PropTypes.number,
	videoTrack          : PropTypes.any,
	videoVisible        : PropTypes.bool.isRequired,
	videoProfile        : PropTypes.string,
	audioCodec          : PropTypes.string,
	videoCodec          : PropTypes.string,
	onChangeDisplayName : PropTypes.func
};