mastodon/app/javascript/flavours/glitch/features/status/components/card.js
ThibG 776aff9656 [Glitch] Hide sensitive preview cards with blurhash
Port 8e96510b25 to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>
2020-06-09 11:01:31 +02:00

278 lines
8.1 KiB
JavaScript

import React from 'react';
import PropTypes from 'prop-types';
import Immutable from 'immutable';
import ImmutablePropTypes from 'react-immutable-proptypes';
import { FormattedMessage } from 'react-intl';
import punycode from 'punycode';
import classnames from 'classnames';
import { decode as decodeIDNA } from 'flavours/glitch/util/idna';
import Icon from 'flavours/glitch/components/icon';
import classNames from 'classnames';
import { useBlurhash } from 'flavours/glitch/util/initial_state';
import { decode } from 'blurhash';
const getHostname = url => {
const parser = document.createElement('a');
parser.href = url;
return parser.hostname;
};
const trim = (text, len) => {
const cut = text.indexOf(' ', len);
if (cut === -1) {
return text;
}
return text.substring(0, cut) + (text.length > len ? '…' : '');
};
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 React.PureComponent {
static propTypes = {
card: ImmutablePropTypes.map,
maxDescription: PropTypes.number,
onOpenMedia: PropTypes.func.isRequired,
compact: PropTypes.bool,
defaultWidth: PropTypes.number,
cacheWidth: PropTypes.func,
sensitive: PropTypes.bool,
};
static defaultProps = {
maxDescription: 50,
compact: false,
};
state = {
width: this.props.defaultWidth || 280,
previewLoaded: false,
embedded: false,
revealed: !this.props.sensitive,
};
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 () {
if (this.props.card && this.props.card.get('blurhash')) {
this._decode();
}
}
componentDidUpdate (prevProps) {
const { card } = this.props;
if (card.get('blurhash') && (!prevProps.card || prevProps.card.get('blurhash') !== card.get('blurhash'))) {
this._decode();
}
}
_decode () {
if (!useBlurhash) return;
const hash = this.props.card.get('blurhash');
const pixels = decode(hash, 32, 32);
if (pixels) {
const ctx = this.canvas.getContext('2d');
const imageData = new ImageData(pixels, 32, 32);
ctx.putImageData(imageData, 0, 0);
}
}
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 => {
if (c) {
if (this.props.cacheWidth) this.props.cacheWidth(c.offsetWidth);
this.setState({ width: c.offsetWidth });
}
}
setCanvasRef = c => {
this.canvas = c;
}
handleImageLoad = () => {
this.setState({ previewLoaded: true });
}
handleReveal = () => {
this.setState({ revealed: true });
}
renderVideo () {
const { card } = this.props;
const content = { __html: addAutoPlay(card.get('html')) };
const { width } = this.state;
const ratio = card.get('width') / card.get('height');
const height = width / ratio;
return (
<div
ref={this.setRef}
className='status-card__image status-card-video'
dangerouslySetInnerHTML={content}
style={{ height }}
/>
);
}
render () {
const { card, maxDescription, compact, defaultWidth } = this.props;
const { width, 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('width') + 100 >= width)) || 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 ratio = card.get('width') / card.get('height');
const height = (compact && !embedded) ? (width / (16 / 9)) : (width / ratio);
const description = (
<div className={classNames('status-card__content', { 'status-card__content--blurred': !revealed })}>
{title}
{!(horizontal || compact) && <p className='status-card__description'>{trim(card.get('description') || '', maxDescription)}</p>}
<span className='status-card__host'>{provider}</span>
</div>
);
let embed = '';
let canvas = <canvas width={32} height={32} ref={this.setCanvasRef} className={classNames('status-card__image-preview', { 'status-card__image-preview--hidden' : revealed && this.state.previewLoaded })} />;
let thumbnail = <img src={card.get('image')} alt='' style={{ width: horizontal ? width : null, height: horizontal ? height : null, visibility: revealed ? null : 'hidden' }} 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>
</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='external-link' /></a>}
</div>
</div>
)}
{!revealed && spoilerButton}
</div>
);
}
return (
<div className={className} ref={this.setRef}>
{embed}
{!compact && description}
</div>
);
} else if (card.get('image')) {
embed = (
<div className='status-card__image'>
{canvas}
{thumbnail}
{!revealed && spoilerButton}
</div>
);
} else {
embed = (
<div className='status-card__image'>
<Icon id='file-text' />
{!revealed && spoilerButton}
</div>
);
}
return (
<a href={card.get('url')} className={className} target='_blank' rel='noopener noreferrer' ref={this.setRef}>
{embed}
{description}
</a>
);
}
}