592 lines
20 KiB
TypeScript
592 lines
20 KiB
TypeScript
import React, {
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FC, memo, useCallback, useEffect, useMemo, useRef, useState,
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} from '../../lib/teact/teact';
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import { getGlobal, withGlobal } from '../../lib/teact/teactn';
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import {
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ApiAction, ApiMessage, ApiRestrictionReason, MAIN_THREAD_ID,
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} from '../../api/types';
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import { GlobalActions, MessageListType } from '../../global/types';
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import { LoadMoreDirection } from '../../types';
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import { ANIMATION_END_DELAY, MESSAGE_LIST_SLICE } from '../../config';
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import {
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selectChatMessages,
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selectIsViewportNewest,
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selectFirstUnreadId,
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selectFocusedMessageId,
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selectChat,
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selectIsInSelectMode,
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selectIsChatWithSelf,
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selectChatBot,
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selectIsChatBotNotStarted,
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selectScrollOffset,
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selectThreadTopMessageId,
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selectFirstMessageId,
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selectScheduledMessages,
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selectCurrentMessageIds,
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} from '../../modules/selectors';
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import { isChatChannel, isChatGroup, isChatPrivate } from '../../modules/helpers';
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import { orderBy, pick } from '../../util/iteratees';
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import { fastRaf, debounce, onTickEnd } from '../../util/schedulers';
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import useLayoutEffectWithPrevDeps from '../../hooks/useLayoutEffectWithPrevDeps';
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import useEffectWithPrevDeps from '../../hooks/useEffectWithPrevDeps';
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import buildClassName from '../../util/buildClassName';
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import { groupMessages, MessageDateGroup } from './helpers/groupMessages';
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import { preventMessageInputBlur } from './helpers/preventMessageInputBlur';
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import useOnChange from '../../hooks/useOnChange';
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import useStickyDates from './hooks/useStickyDates';
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import { dispatchHeavyAnimationEvent } from '../../hooks/useHeavyAnimationCheck';
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import resetScroll from '../../util/resetScroll';
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import fastSmoothScroll, { isAnimatingScroll } from '../../util/fastSmoothScroll';
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import renderText from '../common/helpers/renderText';
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import useLang from '../../hooks/useLang';
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import useWindowSize from '../../hooks/useWindowSize';
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import Loading from '../ui/Loading';
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import MessageListContent from './MessageListContent';
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import ContactGreeting from './ContactGreeting';
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import NoMessages from './NoMessages';
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import './MessageList.scss';
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type OwnProps = {
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chatId: number;
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threadId: number;
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type: MessageListType;
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canPost: boolean;
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isReady: boolean;
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onFabToggle: (shouldShow: boolean) => void;
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onNotchToggle: (shouldShow: boolean) => void;
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hasTools?: boolean;
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};
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type StateProps = {
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isChatLoaded?: boolean;
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isChannelChat?: boolean;
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isGroupChat?: boolean;
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isChatWithSelf?: boolean;
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isCreator?: boolean;
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isBot?: boolean;
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messageIds?: number[];
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messagesById?: Record<number, ApiMessage>;
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firstUnreadId?: number;
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isViewportNewest?: boolean;
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isRestricted?: boolean;
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restrictionReason?: ApiRestrictionReason;
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focusingId?: number;
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hasFocusHighlight?: boolean;
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isSelectModeActive?: boolean;
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animationLevel?: number;
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lastMessage?: ApiMessage;
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botDescription?: string;
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threadTopMessageId?: number;
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threadFirstMessageId?: number;
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hasLinkedChat?: boolean;
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};
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type DispatchProps = Pick<GlobalActions, 'loadViewportMessages' | 'setScrollOffset' | 'openHistoryCalendar'>;
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const BOTTOM_THRESHOLD = 100;
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const UNREAD_DIVIDER_TOP = 10;
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const UNREAD_DIVIDER_TOP_WITH_TOOLS = 60;
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const SCROLL_DEBOUNCE = 200;
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const FOCUSING_DURATION = 1000;
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const BOTTOM_FOCUS_MARGIN = 20;
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const SELECT_MODE_ANIMATION_DURATION = 200;
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const UNREAD_DIVIDER_CLASS = 'unread-divider';
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const runDebouncedForScroll = debounce((cb) => cb(), SCROLL_DEBOUNCE, false);
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const MessageList: FC<OwnProps & StateProps & DispatchProps> = ({
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chatId,
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threadId,
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type,
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hasTools,
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onFabToggle,
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onNotchToggle,
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isChatLoaded,
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isChannelChat,
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isGroupChat,
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canPost,
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isReady,
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isChatWithSelf,
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isCreator,
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isBot,
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messageIds,
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messagesById,
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firstUnreadId,
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isViewportNewest,
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threadFirstMessageId,
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isRestricted,
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restrictionReason,
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focusingId,
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hasFocusHighlight,
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isSelectModeActive,
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loadViewportMessages,
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setScrollOffset,
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lastMessage,
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botDescription,
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threadTopMessageId,
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hasLinkedChat,
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openHistoryCalendar,
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}) => {
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// eslint-disable-next-line no-null/no-null
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const containerRef = useRef<HTMLDivElement>(null);
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// We update local cached `scrollOffsetRef` when opening chat.
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// Then we update global version every second on scrolling.
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const scrollOffsetRef = useRef<number>((type === 'thread' && selectScrollOffset(getGlobal(), chatId, threadId)) || 0);
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const anchorIdRef = useRef<string>();
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const anchorTopRef = useRef<number>();
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const listItemElementsRef = useRef<HTMLDivElement[]>();
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const memoUnreadDividerBeforeIdRef = useRef<number | undefined>();
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// Updated every time (to be used from intersection callback closure)
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const memoFirstUnreadIdRef = useRef<number>();
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const memoFocusingIdRef = useRef<number>();
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const isScrollTopJustUpdatedRef = useRef(false);
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const shouldAnimateAppearanceRef = useRef(Boolean(lastMessage));
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const [containerHeight, setContainerHeight] = useState<number | undefined>();
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const areMessagesLoaded = Boolean(messageIds);
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useOnChange(() => {
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// We only need it first time when message list appears
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if (areMessagesLoaded) {
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onTickEnd(() => {
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shouldAnimateAppearanceRef.current = false;
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});
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}
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}, [areMessagesLoaded]);
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useOnChange(() => {
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memoFirstUnreadIdRef.current = firstUnreadId;
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// Updated only once (to preserve divider even after messages are read)
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if (!memoUnreadDividerBeforeIdRef.current) {
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memoUnreadDividerBeforeIdRef.current = firstUnreadId;
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}
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}, [firstUnreadId]);
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useOnChange(() => {
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memoFocusingIdRef.current = focusingId;
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}, [focusingId]);
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const messageGroups = useMemo(() => {
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if (!messageIds || !messagesById) {
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return undefined;
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}
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const viewportIds = threadTopMessageId && (!messageIds[0] || threadFirstMessageId === messageIds[0])
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? [threadTopMessageId, ...messageIds]
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: messageIds;
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if (!viewportIds.length) {
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return undefined;
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}
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const listedMessages = viewportIds.map((id) => messagesById[id]).filter(Boolean);
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return groupMessages(orderBy(listedMessages, ['date', 'id']), memoUnreadDividerBeforeIdRef.current);
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}, [messageIds, messagesById, threadFirstMessageId, threadTopMessageId]);
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const loadMoreAround = useMemo(() => {
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if (type !== 'thread') {
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return undefined;
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}
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return debounce(() => loadViewportMessages({ direction: LoadMoreDirection.Around }), 1000, true, false);
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// eslint-disable-next-line react-hooks/exhaustive-deps
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}, [loadViewportMessages, messageIds]);
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const { isScrolled, updateStickyDates } = useStickyDates();
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const handleScroll = useCallback(() => {
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if (isScrollTopJustUpdatedRef.current) {
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isScrollTopJustUpdatedRef.current = false;
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return;
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}
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const container = containerRef.current!;
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if (!memoFocusingIdRef.current) {
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updateStickyDates(container, hasTools);
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}
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runDebouncedForScroll(() => {
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fastRaf(() => {
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if (!container.parentElement) {
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return;
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}
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scrollOffsetRef.current = container.scrollHeight - container.scrollTop;
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if (type === 'thread') {
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setScrollOffset({ chatId, threadId, scrollOffset: scrollOffsetRef.current });
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}
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});
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});
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}, [updateStickyDates, hasTools, type, setScrollOffset, chatId, threadId]);
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// Container resize observer (caused by Composer reply/webpage panels)
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useEffect(() => {
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if (!('ResizeObserver' in window) || process.env.APP_ENV === 'perf') {
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return undefined;
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}
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const observer = new ResizeObserver(([entry]) => {
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// During animation
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if (!(entry.target as HTMLDivElement).offsetParent) {
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return;
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}
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setContainerHeight(entry.contentRect.height);
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});
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observer.observe(containerRef.current!);
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return () => {
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observer.disconnect();
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};
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}, []);
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// Memorize height for scroll animation
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const { height: windowHeight } = useWindowSize();
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useEffect(() => {
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if (isReady) {
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containerRef.current!.dataset.normalHeight = String(containerRef.current!.offsetHeight);
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}
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}, [windowHeight, isReady]);
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// Initial message loading
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useEffect(() => {
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if (!loadMoreAround || !isChatLoaded || isRestricted || focusingId) {
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return;
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}
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const container = containerRef.current!;
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if (!messageIds || (
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messageIds.length < MESSAGE_LIST_SLICE / 2
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&& (container.firstElementChild as HTMLDivElement).clientHeight <= container.offsetHeight
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)) {
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loadMoreAround();
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}
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}, [isChatLoaded, messageIds, loadMoreAround, focusingId, isRestricted]);
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// Remember scroll position before repositioning it
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useOnChange(() => {
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if (!messageIds || !listItemElementsRef.current || !isReady) {
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return;
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}
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const preservedItemElements = listItemElementsRef.current
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.filter((element) => messageIds.includes(Number(element.dataset.messageId)));
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// We avoid the very first item as it may be a partly-loaded album
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// and also because it may be removed when messages limit is reached
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const anchor = preservedItemElements[1] || preservedItemElements[0];
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if (!anchor) {
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return;
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}
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anchorIdRef.current = anchor.id;
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anchorTopRef.current = anchor.getBoundingClientRect().top;
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// This should match deps for `useLayoutEffectWithPrevDeps` below
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}, [messageIds, isViewportNewest, containerHeight, hasTools, isReady]);
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// Handles updated message list, takes care of scroll repositioning
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useLayoutEffectWithPrevDeps(([
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prevMessageIds, prevIsViewportNewest, prevContainerHeight,
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]: [
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typeof messageIds, typeof isViewportNewest, typeof containerHeight
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]) => {
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const container = containerRef.current!;
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listItemElementsRef.current = Array.from(container.querySelectorAll<HTMLDivElement>('.message-list-item'));
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// During animation
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if (!container.offsetParent) {
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return;
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}
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// Add extra height when few messages to allow smooth scroll animation. Uses assumption that `parentElement`
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// is a Transition slide and its CSS class can not be reset in a declarative way.
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const shouldForceScroll = (
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isViewportNewest
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&& (messageIds && messageIds.length < MESSAGE_LIST_SLICE / 2)
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&& !container.parentElement!.classList.contains('force-messages-scroll')
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&& (container.firstElementChild as HTMLDivElement)!.clientHeight <= container.offsetHeight * 2
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);
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if (shouldForceScroll) {
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container.parentElement!.classList.add('force-messages-scroll');
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setTimeout(() => {
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if (container.parentElement) {
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container.parentElement.classList.remove('force-messages-scroll');
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}
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}, FOCUSING_DURATION);
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}
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const { scrollTop, scrollHeight, offsetHeight } = container;
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const scrollOffset = scrollOffsetRef.current!;
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const lastItemElement = listItemElementsRef.current[listItemElementsRef.current.length - 1];
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// If two messages come at once (e.g. via Quiz Bot) then the first message will update `scrollOffset`
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// right away (before animation) which creates inconsistency until the animation completes.
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// To workaround that, we calculate `isAtBottom` with a "buffer" of the latest message height (this is approximate).
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const lastItemHeight = lastItemElement ? lastItemElement.offsetHeight : 0;
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const isAtBottom = isViewportNewest && prevIsViewportNewest && (
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scrollOffset - (prevContainerHeight || offsetHeight) - lastItemHeight <= BOTTOM_THRESHOLD
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);
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let newScrollTop!: number;
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const hasFirstMessageChanged = messageIds && prevMessageIds && messageIds[0] !== prevMessageIds[0];
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const hasLastMessageChanged = (
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messageIds && prevMessageIds && messageIds[messageIds.length - 1] !== prevMessageIds[prevMessageIds.length - 1]
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);
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const isAlreadyFocusing = messageIds && memoFocusingIdRef.current === messageIds[messageIds.length - 1];
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if (isAtBottom && hasLastMessageChanged && !hasFirstMessageChanged && !isAlreadyFocusing) {
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if (lastItemElement) {
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fastRaf(() => {
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fastSmoothScroll(
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container,
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lastItemElement,
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'end',
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BOTTOM_FOCUS_MARGIN,
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undefined,
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undefined,
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undefined,
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true,
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);
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});
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}
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newScrollTop = scrollHeight - offsetHeight;
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scrollOffsetRef.current = Math.max(scrollHeight - newScrollTop, offsetHeight);
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// Scroll still needs to be restored after container resize
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if (!shouldForceScroll) {
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return;
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}
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}
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if (process.env.APP_ENV === 'perf') {
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// eslint-disable-next-line no-console
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console.time('scrollTop');
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}
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const isResized = prevContainerHeight !== undefined && prevContainerHeight !== containerHeight;
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const anchor = anchorIdRef.current && container.querySelector(`#${anchorIdRef.current}`);
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const unreadDivider = (
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!anchor
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&& memoUnreadDividerBeforeIdRef.current
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&& container.querySelector<HTMLDivElement>(`.${UNREAD_DIVIDER_CLASS}`)
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);
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if (isAtBottom && isResized) {
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if (isAnimatingScroll()) {
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return;
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}
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newScrollTop = scrollHeight - offsetHeight;
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} else if (anchor) {
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const newAnchorTop = anchor.getBoundingClientRect().top;
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newScrollTop = scrollTop + (newAnchorTop - (anchorTopRef.current || 0));
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} else if (unreadDivider) {
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newScrollTop = Math.min(
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unreadDivider.offsetTop - (hasTools ? UNREAD_DIVIDER_TOP_WITH_TOOLS : UNREAD_DIVIDER_TOP),
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scrollHeight - scrollOffset,
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);
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} else {
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newScrollTop = scrollHeight - scrollOffset;
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}
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resetScroll(container, newScrollTop);
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if (!memoFocusingIdRef.current) {
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isScrollTopJustUpdatedRef.current = true;
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fastRaf(() => {
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isScrollTopJustUpdatedRef.current = false;
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});
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}
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scrollOffsetRef.current = Math.max(scrollHeight - newScrollTop, offsetHeight);
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if (process.env.APP_ENV === 'perf') {
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// eslint-disable-next-line no-console
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console.timeEnd('scrollTop');
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}
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// This should match deps for `useOnChange` above
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}, [messageIds, isViewportNewest, containerHeight, hasTools]);
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useEffectWithPrevDeps(([prevIsSelectModeActive]) => {
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if (prevIsSelectModeActive !== undefined) {
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dispatchHeavyAnimationEvent(SELECT_MODE_ANIMATION_DURATION + ANIMATION_END_DELAY);
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}
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}, [isSelectModeActive]);
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const lang = useLang();
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const isPrivate = Boolean(chatId && isChatPrivate(chatId));
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const withUsers = Boolean((!isPrivate && !isChannelChat) || isChatWithSelf);
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const noAvatars = Boolean(!withUsers || isChannelChat);
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const shouldRenderGreeting = isChatPrivate(chatId) && !isChatWithSelf && !isBot
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&& ((
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!messageGroups && !lastMessage && messageIds
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// Used to avoid flickering when deleting a greeting that has just been sent
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&& (!listItemElementsRef.current || listItemElementsRef.current.length === 0))
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|| checkSingleMessageActionByType('contactSignUp', messageGroups)
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|| (lastMessage && lastMessage.content.action && lastMessage.content.action.type === 'contactSignUp')
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);
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const isGroupChatJustCreated = isGroupChat && isCreator
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&& checkSingleMessageActionByType('chatCreate', messageGroups);
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const className = buildClassName(
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'MessageList custom-scroll',
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noAvatars && 'no-avatars',
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!canPost && 'no-composer',
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type === 'pinned' && 'type-pinned',
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hasFocusHighlight && 'has-focus-highlight',
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isSelectModeActive && 'select-mode-active',
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isScrolled && 'scrolled',
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!isReady && 'is-animating',
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);
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return (
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<div
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ref={containerRef}
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className={className}
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onScroll={handleScroll}
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onMouseDown={preventMessageInputBlur}
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>
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{isRestricted ? (
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<div className="empty">
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<span>
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{restrictionReason ? restrictionReason.text : `This is a private ${isChannelChat ? 'channel' : 'chat'}`}
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</span>
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</div>
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) : botDescription ? (
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<div className="empty rich"><span>{renderText(lang(botDescription), ['br', 'emoji', 'links'])}</span></div>
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) : shouldRenderGreeting ? (
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<ContactGreeting userId={chatId} />
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) : messageIds && (!messageGroups || isGroupChatJustCreated) ? (
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<NoMessages
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chatId={chatId}
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type={type}
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isChatWithSelf={isChatWithSelf}
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isGroupChatJustCreated={isGroupChatJustCreated}
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/>
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) : ((messageIds && messageGroups) || lastMessage) ? (
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<MessageListContent
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messageIds={messageIds || [lastMessage!.id]}
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messageGroups={messageGroups || groupMessages([lastMessage!])}
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isViewportNewest={Boolean(isViewportNewest)}
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isUnread={Boolean(firstUnreadId)}
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withUsers={withUsers}
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noAvatars={noAvatars}
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containerRef={containerRef}
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anchorIdRef={anchorIdRef}
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memoFirstUnreadIdRef={memoUnreadDividerBeforeIdRef}
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threadId={threadId}
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type={type}
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threadTopMessageId={threadTopMessageId}
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hasLinkedChat={hasLinkedChat}
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isSchedule={messageGroups ? type === 'scheduled' : false}
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noAppearanceAnimation={!messageGroups || !shouldAnimateAppearanceRef.current}
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onFabToggle={onFabToggle}
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onNotchToggle={onNotchToggle}
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openHistoryCalendar={openHistoryCalendar}
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/>
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) : (
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<Loading color="white" />
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)}
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</div>
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);
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};
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function checkSingleMessageActionByType(type: ApiAction['type'], messageGroups?: MessageDateGroup[]) {
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return messageGroups
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&& messageGroups.length === 1
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|
&& messageGroups[0].senderGroups.length === 1
|
|
&& messageGroups[0].senderGroups[0].length === 1
|
|
&& 'content' in messageGroups[0].senderGroups[0][0]
|
|
&& messageGroups[0].senderGroups[0][0].content.action
|
|
&& messageGroups[0].senderGroups[0][0].content.action.type === type;
|
|
}
|
|
|
|
export default memo(withGlobal<OwnProps>(
|
|
(global, { chatId, threadId, type }): StateProps => {
|
|
const chat = selectChat(global, chatId);
|
|
if (!chat) {
|
|
return {};
|
|
}
|
|
|
|
const messageIds = selectCurrentMessageIds(global, chatId, threadId, type);
|
|
const messagesById = type === 'scheduled'
|
|
? selectScheduledMessages(global, chatId)
|
|
: selectChatMessages(global, chatId);
|
|
const threadTopMessageId = selectThreadTopMessageId(global, chatId, threadId);
|
|
|
|
if (
|
|
threadId !== MAIN_THREAD_ID
|
|
&& !(messagesById && threadTopMessageId && messagesById[threadTopMessageId])
|
|
) {
|
|
return {};
|
|
}
|
|
|
|
const { isRestricted, restrictionReason, lastMessage } = chat;
|
|
const focusingId = selectFocusedMessageId(global, chatId);
|
|
const hasFocusHighlight = focusingId ? !global.focusedMessage!.noHighlight : undefined;
|
|
|
|
const withLastMessageWhenPreloading = (
|
|
threadId === MAIN_THREAD_ID
|
|
&& !messageIds && !chat.unreadCount && !focusingId && lastMessage && !lastMessage.groupedId
|
|
);
|
|
|
|
const bot = selectChatBot(global, chatId);
|
|
let botDescription: string | undefined;
|
|
if (selectIsChatBotNotStarted(global, chatId)) {
|
|
const chatBot = selectChatBot(global, chatId)!;
|
|
if (chatBot.fullInfo) {
|
|
botDescription = chatBot.fullInfo.botDescription || 'NoMessages';
|
|
} else {
|
|
botDescription = 'Updating bot info...';
|
|
}
|
|
}
|
|
|
|
return {
|
|
isChatLoaded: true,
|
|
isRestricted,
|
|
restrictionReason,
|
|
isChannelChat: isChatChannel(chat),
|
|
isGroupChat: isChatGroup(chat),
|
|
isCreator: chat.isCreator,
|
|
isChatWithSelf: selectIsChatWithSelf(global, chatId),
|
|
isBot: Boolean(bot),
|
|
messageIds,
|
|
messagesById,
|
|
firstUnreadId: selectFirstUnreadId(global, chatId, threadId),
|
|
isViewportNewest: type !== 'thread' || selectIsViewportNewest(global, chatId, threadId),
|
|
threadFirstMessageId: selectFirstMessageId(global, chatId, threadId),
|
|
focusingId,
|
|
hasFocusHighlight,
|
|
isSelectModeActive: selectIsInSelectMode(global),
|
|
botDescription,
|
|
threadTopMessageId,
|
|
hasLinkedChat: chat.fullInfo && ('linkedChatId' in chat.fullInfo)
|
|
? Boolean(chat.fullInfo.linkedChatId)
|
|
: undefined,
|
|
...(withLastMessageWhenPreloading && { lastMessage }),
|
|
};
|
|
},
|
|
(setGlobal, actions): DispatchProps => pick(actions, [
|
|
'loadViewportMessages',
|
|
'setScrollOffset',
|
|
'openHistoryCalendar',
|
|
]),
|
|
)(MessageList));
|