@sendbird/uikit-react-native/lib/module/domain/groupChannelThread/component/GroupChannelThreadMessageList.js

Sendbird UIKit for React Native: A feature-rich and customizable chat UI kit with messaging, channel management, and user authentication.

function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
import React, { useContext, useEffect, useLayoutEffect, useRef } from 'react';
import { useChannelHandler } from '@sendbird/uikit-chat-hooks';
import { isDifferentChannel, useFreshCallback, useUniqHandlerId } from '@sendbird/uikit-utils';
import ChannelThreadMessageList from '../../../components/ChannelThreadMessageList';
import { useSendbirdChat } from '../../../hooks/useContext';
import { GroupChannelThreadContexts } from '../module/moduleContext';
const GroupChannelThreadMessageList = props => {
  const {
    sdk
  } = useSendbirdChat();
  const {
    setMessageToEdit
  } = useContext(GroupChannelThreadContexts.Fragment);
  const {
    subscribe
  } = useContext(GroupChannelThreadContexts.PubSub);
  const {
    flatListRef,
    lazyScrollToBottom,
    lazyScrollToIndex
  } = useContext(GroupChannelThreadContexts.MessageList);
  const id = useUniqHandlerId('GroupChannelThreadMessageList');
  const ignorePropReached = useRef(false);
  const _onTopReached = () => {
    if (!ignorePropReached.current) {
      props.onTopReached();
    }
  };
  const _onBottomReached = () => {
    if (!ignorePropReached.current) {
      props.onBottomReached();
    }
  };
  const scrollToBottom = useFreshCallback(async function () {
    let animated = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
    if (props.hasNext()) {
      props.onScrolledAwayFromBottom(false);
      await props.onResetMessageList();
      props.onScrolledAwayFromBottom(false);
      lazyScrollToBottom({
        animated
      });
    } else {
      lazyScrollToBottom({
        animated
      });
    }
  });
  useLayoutEffect(() => {
    if (props.startingPoint) {
      const foundMessageIndex = props.messages.findIndex(it => it.createdAt === props.startingPoint);
      const isIncludedInList = foundMessageIndex > -1;
      if (isIncludedInList) {
        ignorePropReached.current = true;
        const timeout = 300;
        lazyScrollToIndex({
          index: foundMessageIndex,
          animated: true,
          timeout: timeout
        });
        setTimeout(() => {
          ignorePropReached.current = false;
        }, timeout + 50);
      }
    }
  }, [props.startingPoint]);
  useChannelHandler(sdk, id, {
    onReactionUpdated(channel, event) {
      if (isDifferentChannel(channel, props.channel)) return;
      const recentMessage = props.messages[0];
      const isRecentMessage = recentMessage && recentMessage.messageId === event.messageId;
      const scrollReachedBottomAndCanScroll = !props.scrolledAwayFromBottom && !props.hasNext();
      if (isRecentMessage && scrollReachedBottomAndCanScroll) {
        lazyScrollToBottom({
          animated: true,
          timeout: 250
        });
      }
    }
  });
  useEffect(() => {
    return subscribe(_ref => {
      let {
        type
      } = _ref;
      switch (type) {
        case 'TYPING_BUBBLE_RENDERED':
        case 'MESSAGES_RECEIVED':
          {
            if (!props.scrolledAwayFromBottom) {
              scrollToBottom(true);
            }
            break;
          }
        case 'MESSAGE_SENT_SUCCESS':
        case 'MESSAGE_SENT_PENDING':
          {
            scrollToBottom(false);
            break;
          }
      }
    });
  }, [props.scrolledAwayFromBottom]);
  return /*#__PURE__*/React.createElement(ChannelThreadMessageList, _extends({}, props, {
    ref: flatListRef,
    onTopReached: _onTopReached,
    onBottomReached: _onBottomReached,
    onEditMessage: setMessageToEdit,
    onPressNewMessagesButton: scrollToBottom,
    onPressScrollToBottomButton: scrollToBottom,
    renderNewMessagesButton: null,
    renderScrollToBottomButton: null
  }));
};
export default /*#__PURE__*/React.memo(GroupChannelThreadMessageList);
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