142 lines
4 KiB
JavaScript
142 lines
4 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 CommentView from 'component/comment';
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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, string) => void,
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doCommentSocketDisconnect: (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 {
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claim,
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uri,
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embed,
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doCommentSocketConnect,
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doCommentSocketDisconnect,
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comments,
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doCommentList,
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fetchingComments,
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} = 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(uri, claimId);
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}
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return () => {
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if (claimId) {
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doCommentSocketDisconnect(claimId);
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}
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};
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}, [claimId, uri, doCommentList, doCommentSocketConnect, doCommentSocketDisconnect]);
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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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<CommentView
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livestream
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isTopLevel
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uri={uri}
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authorUri={comment.channel_url}
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author={comment.channel_name}
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claimId={comment.claim_id}
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commentId={comment.comment_id}
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message={comment.comment}
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timePosted={comment.timestamp * 1000}
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/>
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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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