Masto/app/javascript/flavours/glitch/features/status/components/card.jsx

import PropTypes from "prop-types";
import { PureComponent } from "react";

import { FormattedMessage } from "react-intl";

import classnames from "classnames";

import Immutable from "immutable";
import ImmutablePropTypes from "react-immutable-proptypes";

import { Blurhash } from "flavours/glitch/components/blurhash";
import { Icon } from "flavours/glitch/components/icon";
import { decode as decodeIDNA } from "flavours/glitch/utils/idna";

const getHostname = url => {
  const parser = document.createElement("a");
  parser.href = url;
  return parser.hostname;
};

const domParser = new DOMParser();

const addAutoPlay = html => {
  const document = domParser.parseFromString(html, "text/html").documentElement;
  const iframe = document.querySelector("iframe");

  if (iframe) {
    if (iframe.src.indexOf("?") !== -1) {
      iframe.src += "&";
    } else {
      iframe.src += "?";
    }

    iframe.src += "autoplay=1&auto_play=1";

    // DOM parser creates html/body elements around original HTML fragment,
    // so we need to get innerHTML out of the body and not the entire document
    return document.querySelector("body").innerHTML;
  }

  return html;
};

export default class Card extends PureComponent {

  static propTypes = {
    card: ImmutablePropTypes.map,
    onOpenMedia: PropTypes.func.isRequired,
    compact: PropTypes.bool,
    sensitive: PropTypes.bool,
    useBlurhash: PropTypes.bool,
  };

  static defaultProps = {
    compact: false,
  };

  state = {
    previewLoaded: false,
    embedded: false,
    revealed: !this.props.sensitive,
  };

  UNSAFE_componentWillReceiveProps (nextProps) {
    if (!Immutable.is(this.props.card, nextProps.card)) {
      this.setState({ embedded: false, previewLoaded: false });
    }
    if (this.props.sensitive !== nextProps.sensitive) {
      this.setState({ revealed: !nextProps.sensitive });
    }
  }

  componentDidMount () {
    window.addEventListener("resize", this.handleResize, { passive: true });
  }

  componentWillUnmount () {
    window.removeEventListener("resize", this.handleResize);
  }

  handlePhotoClick = () => {
    const { card, onOpenMedia } = this.props;

    onOpenMedia(
      Immutable.fromJS([
        {
          type: "image",
          url: card.get("embed_url"),
          description: card.get("title"),
          meta: {
            original: {
              width: card.get("width"),
              height: card.get("height"),
            },
          },
        },
      ]),
      0,
    );
  };

  handleEmbedClick = () => {
    const { card } = this.props;

    if (card.get("type") === "photo") {
      this.handlePhotoClick();
    } else {
      this.setState({ embedded: true });
    }
  };

  setRef = c => {
    this.node = c;
  };

  handleImageLoad = () => {
    this.setState({ previewLoaded: true });
  };

  handleReveal = e => {
    e.preventDefault();
    e.stopPropagation();
    this.setState({ revealed: true });
  };

  renderVideo () {
    const { card }  = this.props;
    const content   = { __html: addAutoPlay(card.get("html")) };

    return (
      <div
        ref={this.setRef}
        className='status-card__image status-card-video'
        dangerouslySetInnerHTML={content}
        style={{ aspectRatio: `${card.get("width")} / ${card.get("height")}` }}
      />
    );
  }

  render () {
    const { card, compact, useBlurhash } = this.props;
    const { embedded, revealed } = this.state;

    if (card === null) {
      return null;
    }

    const provider    = card.get("provider_name").length === 0 ? decodeIDNA(getHostname(card.get("url"))) : card.get("provider_name");
    const horizontal  = (!compact && card.get("width") > card.get("height")) || card.get("type") !== "link" || embedded;
    const interactive = card.get("type") !== "link";
    const className   = classnames("status-card", { horizontal, compact, interactive });
    const title       = interactive ? <a className='status-card__title' href={card.get("url")} title={card.get("title")} rel='noopener noreferrer' target='_blank'><strong>{card.get("title")}</strong></a> : <strong className='status-card__title' title={card.get("title")}>{card.get("title")}</strong>;
    const language    = card.get("language") || "";

    const description = (
      <div className='status-card__content' lang={language}>
        {title}
        {!(horizontal || compact) && <p className='status-card__description' title={card.get("description")}>{card.get("description")}</p>}
        <span className='status-card__host'>{provider}</span>
      </div>
    );

    const thumbnailStyle = {
      visibility: revealed? null : "hidden",
    };

    if (horizontal) {
      thumbnailStyle.aspectRatio = (compact && !embedded) ? "16 / 9" : `${card.get("width")} / ${card.get("height")}`;
    }

    let embed     = "";
    let canvas = (
      <Blurhash
        className={classnames("status-card__image-preview", {
          "status-card__image-preview--hidden": revealed && this.state.previewLoaded,
        })}
        hash={card.get("blurhash")}
        dummy={!useBlurhash}
      />
    );
    const thumbnailDescription = card.get("image_description");
    const thumbnail = <img src={card.get("image")} alt={thumbnailDescription} title={thumbnailDescription} lang={language} style={thumbnailStyle} onLoad={this.handleImageLoad} className='status-card__image-image' />;
    let spoilerButton = (
      <button type='button' onClick={this.handleReveal} className='spoiler-button__overlay'>
        <span className='spoiler-button__overlay__label'>
          <FormattedMessage id='status.sensitive_warning' defaultMessage='Sensitive content' />
          <span className='spoiler-button__overlay__action'><FormattedMessage id='status.media.show' defaultMessage='Click to show' /></span>
        </span>
      </button>
    );
    spoilerButton = (
      <div className={classnames("spoiler-button", { "spoiler-button--minified": revealed })}>
        {spoilerButton}
      </div>
    );

    if (interactive) {
      if (embedded) {
        embed = this.renderVideo();
      } else {
        let iconVariant = "play";

        if (card.get("type") === "photo") {
          iconVariant = "search-plus";
        }

        embed = (
          <div className='status-card__image'>
            {canvas}
            {thumbnail}

            {revealed && (
              <div className='status-card__actions'>
                <div>
                  <button onClick={this.handleEmbedClick}><Icon id={iconVariant} /></button>
                  {horizontal && <a href={card.get("url")} target='_blank' rel='noopener noreferrer'><Icon id='arrow-square-out' /></a>}
                </div>
              </div>
            )}
            {!revealed && spoilerButton}
          </div>
        );
      }

      return (
        <div className={className} ref={this.setRef} onClick={revealed ? null : this.handleReveal} role={revealed ? "button" : null}>
          {embed}
          {!compact && description}
        </div>
      );
    } else if (card.get("image")) {
      embed = (
        <div className='status-card__image'>
          {canvas}
          {thumbnail}
        </div>
      );
    } else {
      embed = (
        <div className='status-card__image'>
          <Icon id='file-text' />
        </div>
      );
    }

    return (
      <a href={card.get("url")} className={className} target='_blank' rel='noopener noreferrer' ref={this.setRef}>
        {embed}
        {description}
      </a>
    );
  }

}