mastodon/app/assets/javascripts/components/components/video_player.jsx

import ImmutablePropTypes from 'react-immutable-proptypes';
import PropTypes from 'prop-types';
import IconButton from './icon_button';
import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
import { isIOS } from '../is_mobile';

const messages = defineMessages({
  toggle_sound: { id: 'video_player.toggle_sound', defaultMessage: 'Toggle sound' },
  toggle_visible: { id: 'video_player.toggle_visible', defaultMessage: 'Toggle visibility' },
  expand_video: { id: 'video_player.expand', defaultMessage: 'Expand video' },
  expand_video: { id: 'video_player.video_error', defaultMessage: 'Video could not be played' }
});

const videoStyle = {
  position: 'relative',
  zIndex: '1',
  width: '100%',
  height: '100%',
  objectFit: 'cover',
  top: '50%',
  transform: 'translateY(-50%)'
};

const muteStyle = {
  position: 'absolute',
  top: '4px',
  right: '4px',
  color: 'white',
  textShadow: "0px 1px 1px black, 1px 0px 1px black",
  opacity: '0.8',
  zIndex: '5'
};

const coverStyle = {
  marginTop: '8px',
  textAlign: 'center',
  height: '100%',
  cursor: 'pointer',
  display: 'flex',
  alignItems: 'center',
  justifyContent: 'center',
  flexDirection: 'column',
  position: 'relative'
};

const spoilerSpanStyle = {
  display: 'block',
  fontSize: '14px'
};

const spoilerSubSpanStyle = {
  display: 'block',
  fontSize: '11px',
  fontWeight: '500'
};

const spoilerButtonStyle = {
  position: 'absolute',
  top: '4px',
  left: '4px',
  color: 'white',
  textShadow: "0px 1px 1px black, 1px 0px 1px black",
  zIndex: '100'
};

const expandButtonStyle = {
  position: 'absolute',
  bottom: '4px',
  right: '4px',
  color: 'white',
  textShadow: "0px 1px 1px black, 1px 0px 1px black",
  zIndex: '100'
};

class VideoPlayer extends React.PureComponent {

  constructor (props, context) {
    super(props, context);
    this.state = {
      visible: !this.props.sensitive,
      preview: true,
      muted: true,
      hasAudio: true,
      videoError: false
    };
    this.handleClick = this.handleClick.bind(this);
    this.handleVideoClick = this.handleVideoClick.bind(this);
    this.handleOpen = this.handleOpen.bind(this);
    this.handleVisibility = this.handleVisibility.bind(this);
    this.handleExpand = this.handleExpand.bind(this);
    this.setRef = this.setRef.bind(this);
    this.handleLoadedData = this.handleLoadedData.bind(this);
    this.handleVideoError = this.handleVideoError.bind(this);
  }

  handleClick () {
    this.setState({ muted: !this.state.muted });
  }

  handleVideoClick (e) {
    e.stopPropagation();

    const node = ReactDOM.findDOMNode(this).querySelector('video');

    if (node.paused) {
      node.play();
    } else {
      node.pause();
    }
  }

  handleOpen () {
    this.setState({ preview: !this.state.preview });
  }

  handleVisibility () {
    this.setState({
      visible: !this.state.visible,
      preview: true
    });
  }

  handleExpand () {
    this.video.pause();
    this.props.onOpenVideo(this.props.media, this.video.currentTime);
  }

  setRef (c) {
    this.video = c;
  }

  handleLoadedData () {
    if (('WebkitAppearance' in document.documentElement.style && this.video.audioTracks.length === 0) || this.video.mozHasAudio === false) {
      this.setState({ hasAudio: false });
    }
  }

  handleVideoError () {
    this.setState({ videoError: true });
  }

  componentDidMount () {
    if (!this.video) {
      return;
    }

    this.video.addEventListener('loadeddata', this.handleLoadedData);
    this.video.addEventListener('error', this.handleVideoError);
  }

  componentDidUpdate () {
    if (!this.video) {
      return;
    }

    this.video.addEventListener('loadeddata', this.handleLoadedData);
    this.video.addEventListener('error', this.handleVideoError);
  }

  componentWillUnmount () {
    if (!this.video) {
      return;
    }

    this.video.removeEventListener('loadeddata', this.handleLoadedData);
    this.video.removeEventListener('error', this.handleVideoError);
  }

  render () {
    const { media, intl, width, height, sensitive, autoplay } = this.props;

    let spoilerButton = (
      <div style={{...spoilerButtonStyle, display: !this.state.visible ? 'none' : 'block'}} >
        <IconButton overlay title={intl.formatMessage(messages.toggle_visible)} icon={this.state.visible ? 'eye' : 'eye-slash'} onClick={this.handleVisibility} />
      </div>
    );

    let expandButton = (
      <div style={expandButtonStyle} >
        <IconButton overlay title={intl.formatMessage(messages.expand_video)} icon='expand' onClick={this.handleExpand} />
      </div>
    );

    let muteButton = '';

    if (this.state.hasAudio) {
      muteButton = (
        <div style={muteStyle}>
          <IconButton overlay title={intl.formatMessage(messages.toggle_sound)} icon={this.state.muted ? 'volume-off' : 'volume-up'} onClick={this.handleClick} />
        </div>
      );
    }

    if (!this.state.visible) {
      if (sensitive) {
        return (
          <div role='button' tabIndex='0' style={{...coverStyle, width: `${width}px`, height: `${height}px` }} className='media-spoiler' onClick={this.handleVisibility}>
            {spoilerButton}
            <span style={spoilerSpanStyle}><FormattedMessage id='status.sensitive_warning' defaultMessage='Sensitive content' /></span>
            <span style={spoilerSubSpanStyle}><FormattedMessage id='status.sensitive_toggle' defaultMessage='Click to view' /></span>
          </div>
        );
      } else {
        return (
          <div role='button' tabIndex='0' style={{...coverStyle, width: `${width}px`, height: `${height}px` }} className='media-spoiler' onClick={this.handleVisibility}>
            {spoilerButton}
            <span style={spoilerSpanStyle}><FormattedMessage id='status.media_hidden' defaultMessage='Media hidden' /></span>
            <span style={spoilerSubSpanStyle}><FormattedMessage id='status.sensitive_toggle' defaultMessage='Click to view' /></span>
          </div>
        );
      }
    }

    if (this.state.preview && !autoplay) {
      return (
        <div role='button' tabIndex='0' style={{ cursor: 'pointer', position: 'relative', marginTop: '8px', width: `${width}px`, height: `${height}px`, background: `url(${media.get('preview_url')}) no-repeat center`, backgroundSize: 'cover' }} onClick={this.handleOpen}>
          {spoilerButton}
          <div style={{ position: 'absolute', top: '50%', left: '50%', fontSize: '36px', transform: 'translate(-50%, -50%)', padding: '5px', borderRadius: '100px', color: 'rgba(255, 255, 255, 0.8)' }}><i className='fa fa-play' /></div>
        </div>
      );
    }

    if (this.state.videoError) {
      return (
        <div style={{...coverStyle, width: `${width}px`, height: `${height}px` }} className='video-error-cover' >
          <span style={spoilerSpanStyle}><FormattedMessage id='video_player.video_error' defaultMessage='Video could not be played' /></span>
        </div>
      );
    }

    return (
      <div style={{ cursor: 'default', marginTop: '8px', overflow: 'hidden', width: `${width}px`, height: `${height}px`, boxSizing: 'border-box', background: '#000', position: 'relative' }}>
        {spoilerButton}
        {muteButton}
        {expandButton}
        <video role='button' tabIndex='0' ref={this.setRef} src={media.get('url')} autoPlay={!isIOS()} loop={true} muted={this.state.muted} style={videoStyle} onClick={this.handleVideoClick} />
      </div>
    );
  }

}

VideoPlayer.propTypes = {
  media: ImmutablePropTypes.map.isRequired,
  width: PropTypes.number,
  height: PropTypes.number,
  sensitive: PropTypes.bool,
  intl: PropTypes.object.isRequired,
  autoplay: PropTypes.bool,
  onOpenVideo: PropTypes.func.isRequired
};

VideoPlayer.defaultProps = {
  width: 239,
  height: 110
};

export default injectIntl(VideoPlayer);