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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
import React from 'react';
import PropTypes from 'prop-types';
import {postListScrollChange} from 'actions/global_actions.jsx';
export default class PostImageEmbed extends React.PureComponent {
static propTypes = {
/**
* The link to load the image from
*/
link: PropTypes.string.isRequired,
/**
* Function to call when image is loaded
*/
onLinkLoaded: PropTypes.func,
/**
* The function to call if image load fails
*/
onLinkLoadError: PropTypes.func
}
constructor(props) {
super(props);
this.handleLoadComplete = this.handleLoadComplete.bind(this);
this.handleLoadError = this.handleLoadError.bind(this);
this.state = {
loaded: false,
errored: false
};
}
componentWillMount() {
this.loadImg(this.props.link);
}
componentWillReceiveProps(nextProps) {
if (nextProps.link !== this.props.link) {
this.setState({
loaded: false,
errored: false
});
}
}
componentDidUpdate(prevProps) {
if (!this.state.loaded && prevProps.link !== this.props.link) {
this.loadImg(this.props.link);
}
}
loadImg(src) {
const img = new Image();
img.onload = this.handleLoadComplete;
img.onerror = this.handleLoadError;
img.src = src;
}
handleLoadComplete() {
this.setState({
loaded: true,
errored: false
});
postListScrollChange();
if (this.props.onLinkLoaded) {
this.props.onLinkLoaded();
}
}
handleLoadError() {
this.setState({
errored: true,
loaded: true
});
if (this.props.onLinkLoadError) {
this.props.onLinkLoadError();
}
}
render() {
if (this.state.errored || !this.state.loaded) {
return null;
}
return (
<div
className='post__embed-container'
>
<img
className='img-div'
src={this.props.link}
/>
</div>
);
}
}
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