395 lines
12 KiB
JavaScript
395 lines
12 KiB
JavaScript
// @flow
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import { COMMENT_PAGE_SIZE_TOP_LEVEL, SORT_BY } from 'constants/comment';
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import { ENABLE_COMMENT_REACTIONS } from 'config';
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import { useIsMobile, useIsMediumScreen } from 'effects/use-screensize';
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import { getCommentsListTitle } from 'util/comments';
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import * as ICONS from 'constants/icons';
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import * as REACTION_TYPES from 'constants/reactions';
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import Button from 'component/button';
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import Card from 'component/common/card';
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import classnames from 'classnames';
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import CommentCreate from 'component/commentCreate';
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import CommentView from 'component/comment';
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import debounce from 'util/debounce';
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import Empty from 'component/common/empty';
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import React, { useEffect } from 'react';
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import Spinner from 'component/spinner';
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import usePersistedState from 'effects/use-persisted-state';
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import useGetUserMemberships from 'effects/use-get-user-memberships';
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const DEBOUNCE_SCROLL_HANDLER_MS = 200;
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function scaleToDevicePixelRatio(value) {
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const devicePixelRatio = window.devicePixelRatio || 1.0;
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if (devicePixelRatio < 1.0) {
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return Math.ceil(value / devicePixelRatio);
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}
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return Math.ceil(value * devicePixelRatio);
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}
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type Props = {
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allCommentIds: any,
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pinnedComments: Array<Comment>,
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topLevelComments: Array<Comment>,
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topLevelTotalPages: number,
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uri: string,
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claimId?: string,
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channelId?: string,
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claimIsMine: boolean,
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isFetchingComments: boolean,
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isFetchingCommentsById: boolean,
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isFetchingReacts: boolean,
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linkedCommentId?: string,
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totalComments: number,
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fetchingChannels: boolean,
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myReactsByCommentId: ?{ [string]: Array<string> }, // "CommentId:MyChannelId" -> reaction array (note the ID concatenation)
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othersReactsById: ?{ [string]: { [REACTION_TYPES.LIKE | REACTION_TYPES.DISLIKE]: number } },
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activeChannelId: ?string,
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settingsByChannelId: { [channelId: string]: PerChannelSettings },
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commentsAreExpanded?: boolean,
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fetchTopLevelComments: (uri: string, parentId: ?string, page: number, pageSize: number, sortBy: number) => void,
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fetchComment: (commentId: string) => void,
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fetchReacts: (commentIds: Array<string>) => Promise<any>,
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resetComments: (claimId: string) => void,
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claimsByUri: { [string]: any },
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doFetchUserMemberships: (claimIdCsv: string) => void,
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};
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export default function CommentList(props: Props) {
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const {
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allCommentIds,
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uri,
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pinnedComments,
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topLevelComments,
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topLevelTotalPages,
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claimId,
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channelId,
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claimIsMine,
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isFetchingComments,
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isFetchingReacts,
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linkedCommentId,
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totalComments,
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fetchingChannels,
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myReactsByCommentId,
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othersReactsById,
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activeChannelId,
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settingsByChannelId,
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commentsAreExpanded,
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fetchTopLevelComments,
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fetchComment,
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fetchReacts,
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resetComments,
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claimsByUri,
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doFetchUserMemberships,
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} = props;
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const isMobile = useIsMobile();
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const isMediumScreen = useIsMediumScreen();
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const spinnerRef = React.useRef();
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const DEFAULT_SORT = ENABLE_COMMENT_REACTIONS ? SORT_BY.POPULARITY : SORT_BY.NEWEST;
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const [sort, setSort] = usePersistedState('comment-sort-by', DEFAULT_SORT);
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const [page, setPage] = React.useState(1);
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const [didInitialPageFetch, setInitialPageFetch] = React.useState(false);
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const hasDefaultExpansion = commentsAreExpanded || !isMediumScreen || isMobile;
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const [expandedComments, setExpandedComments] = React.useState(hasDefaultExpansion);
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const totalFetchedComments = allCommentIds ? allCommentIds.length : 0;
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const channelSettings = channelId ? settingsByChannelId[channelId] : undefined;
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const moreBelow = page < topLevelTotalPages;
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const title = getCommentsListTitle(totalComments);
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// Display comments immediately if not fetching reactions
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// If not, wait to show comments until reactions are fetched
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const [readyToDisplayComments, setReadyToDisplayComments] = React.useState(
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Boolean(othersReactsById) || !ENABLE_COMMENT_REACTIONS
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);
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// get commenter claim ids for checking premium status
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const commenterClaimIds = topLevelComments.map((comment) => comment.channel_id);
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// update premium status
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const shouldFetchUserMemberships = true;
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useGetUserMemberships(
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shouldFetchUserMemberships,
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commenterClaimIds,
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claimsByUri,
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doFetchUserMemberships,
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[topLevelComments],
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true
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);
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const handleReset = React.useCallback(() => {
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if (claimId) resetComments(claimId);
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setPage(1);
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}, [claimId, resetComments]);
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function changeSort(newSort) {
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if (sort !== newSort) {
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setSort(newSort);
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setPage(0); // Invalidate existing comments
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}
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}
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// Force comments reset
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useEffect(() => {
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if (page === 0) {
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handleReset();
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}
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}, [handleReset, page]);
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// Reset comments only on claim switch
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useEffect(() => {
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return () => handleReset();
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}, [handleReset]);
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// Fetch top-level comments
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useEffect(() => {
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if (page !== 0) {
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if (page === 1 && linkedCommentId) {
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fetchComment(linkedCommentId);
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}
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fetchTopLevelComments(uri, undefined, page, COMMENT_PAGE_SIZE_TOP_LEVEL, sort);
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}
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// no need to listen for uri change, claimId change will trigger page which
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// will handle this
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// eslint-disable-next-line react-hooks/exhaustive-deps
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}, [fetchComment, fetchTopLevelComments, linkedCommentId, page, sort]);
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// Fetch reacts
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useEffect(() => {
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if (totalFetchedComments > 0 && ENABLE_COMMENT_REACTIONS && !fetchingChannels && !isFetchingReacts) {
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let idsForReactionFetch;
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if (!othersReactsById || !myReactsByCommentId) {
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idsForReactionFetch = allCommentIds;
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} else {
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idsForReactionFetch = allCommentIds.filter((commentId) => {
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const key = activeChannelId ? `${commentId}:${activeChannelId}` : commentId;
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return !othersReactsById[key] || (activeChannelId && !myReactsByCommentId[key]);
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});
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}
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if (idsForReactionFetch.length !== 0) {
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fetchReacts(idsForReactionFetch)
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.then(() => {
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setReadyToDisplayComments(true);
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})
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.catch(() => setReadyToDisplayComments(true));
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}
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}
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}, [
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activeChannelId,
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allCommentIds,
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fetchReacts,
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fetchingChannels,
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isFetchingReacts,
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myReactsByCommentId,
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othersReactsById,
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totalFetchedComments,
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]);
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// Scroll to linked-comment
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useEffect(() => {
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if (linkedCommentId) {
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window.pendingLinkedCommentScroll = true;
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} else {
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delete window.pendingLinkedCommentScroll;
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}
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// eslint-disable-next-line react-hooks/exhaustive-deps
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}, []);
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// Infinite scroll
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useEffect(() => {
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if (topLevelComments.length === 0) return;
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function shouldFetchNextPage(page, topLevelTotalPages, yPrefetchPx = 1000) {
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if (!spinnerRef || !spinnerRef.current) return false;
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const rect = spinnerRef.current.getBoundingClientRect(); // $FlowFixMe
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const windowH = window.innerHeight || document.documentElement.clientHeight; // $FlowFixMe
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const windowW = window.innerWidth || document.documentElement.clientWidth; // $FlowFixMe
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const isApproachingViewport = yPrefetchPx !== 0 && rect.top < windowH + scaleToDevicePixelRatio(yPrefetchPx);
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const isInViewport =
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rect.width > 0 &&
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rect.height > 0 &&
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rect.bottom >= 0 &&
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rect.right >= 0 &&
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// $FlowFixMe
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rect.top <= windowH &&
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// $FlowFixMe
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rect.left <= windowW;
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return (isInViewport || isApproachingViewport) && page < topLevelTotalPages;
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}
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const handleCommentScroll = debounce(() => {
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if (shouldFetchNextPage(page, topLevelTotalPages)) {
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setPage(page + 1);
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setInitialPageFetch(true);
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}
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}, DEBOUNCE_SCROLL_HANDLER_MS);
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if (!didInitialPageFetch) {
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handleCommentScroll();
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setInitialPageFetch(true);
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}
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if (hasDefaultExpansion && !isFetchingComments && readyToDisplayComments && moreBelow) {
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const commentsInDrawer = Boolean(document.querySelector('.MuiDrawer-root .card--enable-overflow'));
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const scrollingElement = commentsInDrawer ? document.querySelector('.card--enable-overflow') : window;
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if (scrollingElement) {
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scrollingElement.addEventListener('scroll', handleCommentScroll);
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return () => scrollingElement.removeEventListener('scroll', handleCommentScroll);
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}
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}
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}, [
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topLevelComments,
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hasDefaultExpansion,
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didInitialPageFetch,
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isFetchingComments,
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isMobile,
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moreBelow,
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page,
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readyToDisplayComments,
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topLevelTotalPages,
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]);
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const commentProps = { isTopLevel: true, threadDepth: 3, uri, claimIsMine, linkedCommentId };
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const actionButtonsProps = {
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totalComments,
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sort,
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changeSort,
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setPage,
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handleRefresh: () => setPage(0),
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};
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return (
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<Card
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className="card--enable-overflow"
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title={!isMobile && title}
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titleActions={<CommentActionButtons {...actionButtonsProps} />}
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actions={
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<>
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{isMobile && <CommentActionButtons {...actionButtonsProps} />}
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<CommentCreate uri={uri} />
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{channelSettings && channelSettings.comments_enabled && !isFetchingComments && !totalComments && (
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<Empty padded text={__('That was pretty deep. What do you think?')} />
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)}
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<ul
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className={classnames({
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comments: !isMediumScreen || expandedComments,
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'comments--contracted': isMediumScreen && !expandedComments,
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})}
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>
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{readyToDisplayComments && (
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<>
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{pinnedComments && <CommentElements comments={pinnedComments} {...commentProps} />}
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<CommentElements comments={topLevelComments} {...commentProps} />
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</>
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)}
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</ul>
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{!hasDefaultExpansion && (
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<div className="card__bottom-actions--comments">
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{(!expandedComments || moreBelow) && (
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<Button
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button="link"
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title={!expandedComments ? __('Expand') : __('More')}
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label={!expandedComments ? __('Expand') : __('More')}
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onClick={() => (!expandedComments ? setExpandedComments(true) : setPage(page + 1))}
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/>
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)}
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{expandedComments && (
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<Button
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button="link"
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title={__('Collapse')}
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label={__('Collapse')}
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onClick={() => setExpandedComments(false)}
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/>
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)}
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</div>
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)}
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{(isFetchingComments || (hasDefaultExpansion && moreBelow)) && (
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<div className="main--empty" ref={spinnerRef}>
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<Spinner type="small" />
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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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}
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type CommentProps = {
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comments: Array<Comment>,
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};
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const CommentElements = (commentProps: CommentProps) => {
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const { comments, ...commentsProps } = commentProps;
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return comments.map((comment) => <CommentView key={comment.comment_id} comment={comment} {...commentsProps} />);
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};
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type ActionButtonsProps = {
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totalComments: number,
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sort: string,
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changeSort: (string) => void,
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handleRefresh: () => void,
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};
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const CommentActionButtons = (actionButtonsProps: ActionButtonsProps) => {
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const { totalComments, sort, changeSort, handleRefresh } = actionButtonsProps;
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const sortButtonProps = { activeSort: sort, changeSort };
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return (
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<>
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{totalComments > 1 && ENABLE_COMMENT_REACTIONS && (
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<span className="comment__sort">
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<SortButton {...sortButtonProps} label={__('Best')} icon={ICONS.BEST} sortOption={SORT_BY.POPULARITY} />
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<SortButton
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{...sortButtonProps}
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label={__('Controversial')}
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icon={ICONS.CONTROVERSIAL}
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sortOption={SORT_BY.CONTROVERSY}
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/>
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<SortButton {...sortButtonProps} label={__('New')} icon={ICONS.NEW} sortOption={SORT_BY.NEWEST} />
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</span>
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)}
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<Button button="alt" icon={ICONS.REFRESH} title={__('Refresh')} onClick={handleRefresh} />
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</>
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);
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};
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type SortButtonProps = {
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activeSort: string,
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sortOption: string,
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changeSort: (string) => void,
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};
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const SortButton = (sortButtonProps: SortButtonProps) => {
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const { activeSort, sortOption, changeSort, ...buttonProps } = sortButtonProps;
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return (
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<Button
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{...buttonProps}
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className={classnames(`button-toggle`, { 'button-toggle--active': activeSort === sortOption })}
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button="alt"
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iconSize={18}
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onClick={() => changeSort(sortOption)}
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/>
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);
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};
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