130 lines
3.9 KiB
JavaScript
130 lines
3.9 KiB
JavaScript
// @flow
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import React from 'react';
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import classnames from 'classnames';
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import Card from 'component/common/card';
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import Spinner from 'component/spinner';
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import CommentCreate from 'component/commentCreate';
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import Button from 'component/button';
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import MarkdownPreview from 'component/common/markdown-preview';
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type Props = {
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uri: string,
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claim: ?StreamClaim,
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activeViewers: number,
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embed?: boolean,
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doCommentSocketConnect: (string) => void,
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doCommentList: (string) => void,
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comments: Array<Comment>,
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fetchingComments: boolean,
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};
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export default function LivestreamFeed(props: Props) {
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const { claim, uri, embed, doCommentSocketConnect, comments, doCommentList, fetchingComments } = props;
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const commentsRef = React.createRef();
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const hasScrolledComments = React.useRef();
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const [performedInitialScroll, setPerformedInitialScroll] = React.useState(false);
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const claimId = claim && claim.claim_id;
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const commentsLength = comments && comments.length;
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React.useEffect(() => {
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if (claimId) {
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doCommentList(uri);
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doCommentSocketConnect(claimId);
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}
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}, [claimId, uri]);
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React.useEffect(() => {
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const element = commentsRef.current;
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function handleScroll() {
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if (element) {
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const scrollHeight = element.scrollHeight - element.offsetHeight;
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const isAtBottom = scrollHeight === element.scrollTop;
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if (!isAtBottom) {
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hasScrolledComments.current = true;
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} else {
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hasScrolledComments.current = false;
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}
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}
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}
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if (element) {
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element.addEventListener('scroll', handleScroll);
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if (commentsLength > 0) {
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// Only update comment scroll if the user hasn't scrolled up to view old comments
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// If they have, do nothing
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if (!hasScrolledComments.current || !performedInitialScroll) {
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element.scrollTop = element.scrollHeight - element.offsetHeight;
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if (!performedInitialScroll) {
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setPerformedInitialScroll(true);
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}
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}
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}
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}
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return () => {
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if (element) {
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element.removeEventListener('scroll', handleScroll);
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}
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};
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}, [commentsRef, commentsLength, performedInitialScroll]);
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if (!claim) {
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return null;
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}
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return (
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<Card
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title={__('Live discussion')}
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smallTitle
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className="livestream__discussion"
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actions={
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<>
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{fetchingComments && (
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<div className="main--empty">
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<Spinner />
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</div>
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)}
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<div
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ref={commentsRef}
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className={classnames('livestream__comments-wrapper', {
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'livestream__comments-wrapper--with-height': commentsLength > 0,
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})}
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>
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{!fetchingComments && comments.length > 0 ? (
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<div className="livestream__comments">
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{comments.map((comment) => (
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<div key={comment.comment_id} className={classnames('livestream__comment')}>
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{comment.channel_url ? (
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<Button
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target="_blank"
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className={classnames('livestream__comment-author', {
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'livestream__comment-author--streamer': claim.signing_channel.claim_id === comment.channel_id,
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})}
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navigate={comment.channel_url}
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label={comment.channel_name}
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/>
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) : (
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<div className="livestream__comment-author">{comment.channel_name}</div>
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)}
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<MarkdownPreview content={comment.comment} simpleLinks />
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</div>
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))}
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</div>
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) : (
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<div className="main--empty" />
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)}
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</div>
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<div className="livestream__comment-create">
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<CommentCreate livestream bottom embed={embed} uri={uri} />
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</div>
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</>
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}
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/>
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);
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}
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