bigbuffet-rw/app/soapbox/features/conversations/components/conversation.tsx

import React from 'react';
import { useHistory } from 'react-router-dom';

import { markConversationRead } from 'soapbox/actions/conversations';
import StatusContainer from 'soapbox/containers/status_container';
import { useAppDispatch, useAppSelector } from 'soapbox/hooks';

import type { Map as ImmutableMap } from 'immutable';

interface IConversation {
  conversationId: string,
  onMoveUp: (id: string) => void,
  onMoveDown: (id: string) => void,
}

const Conversation: React.FC<IConversation> = ({ conversationId, onMoveUp, onMoveDown }) => {
  const dispatch = useAppDispatch();
  const history = useHistory();

  const { accounts, unread, lastStatusId } = useAppSelector((state) => {
    const conversation = state.conversations.get('items').find((x: ImmutableMap<string, any>) => x.get('id') === conversationId);

    return {
      accounts: conversation.get('accounts').map((accountId: string) => state.accounts.get(accountId, null)),
      unread: conversation.get('unread'),
      lastStatusId: conversation.get('last_status', null),
    };
  });

  const handleClick = () => {
    if (unread) {
      dispatch(markConversationRead(conversationId));
    }

    history.push(`/statuses/${lastStatusId}`);
  };

  const handleHotkeyMoveUp = () => {
    onMoveUp(conversationId);
  };

  const handleHotkeyMoveDown = () => {
    onMoveDown(conversationId);
  };

  if (lastStatusId === null) {
    return null;
  }

  return (
    <StatusContainer
    // @ts-ignore
      id={lastStatusId}
      unread={unread}
      otherAccounts={accounts}
      onMoveUp={handleHotkeyMoveUp}
      onMoveDown={handleHotkeyMoveDown}
      onClick={handleClick}
    />
  );
};

export default Conversation;