pleroma/app/soapbox/features/chats/components/chat_list.tsx

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import { Map as ImmutableMap } from 'immutable';
import { debounce } from 'lodash';
import React from 'react';
import { defineMessages, useIntl } from 'react-intl';
import { useDispatch } from 'react-redux';
import { createSelector } from 'reselect';
import { expandChats } from 'soapbox/actions/chats';
import ScrollableList from 'soapbox/components/scrollable_list';
import PlaceholderChat from 'soapbox/features/placeholder/components/placeholder_chat';
import { useAppSelector } from 'soapbox/hooks';
import Chat from './chat';
const messages = defineMessages({
emptyMessage: { id: 'chat_panels.main_window.empty', defaultMessage: 'No chats found. To start a chat, visit a user\'s profile' },
});
const handleLoadMore = debounce((dispatch) => {
dispatch(expandChats());
}, 300, { leading: true });
const getSortedChatIds = (chats: ImmutableMap<string, any>) => (
chats
.toList()
.sort(chatDateComparator)
.map(chat => chat.id)
);
const chatDateComparator = (chatA: { updated_at: string }, chatB: { updated_at: string }) => {
// Sort most recently updated chats at the top
const a = new Date(chatA.updated_at);
const b = new Date(chatB.updated_at);
if (a === b) return 0;
if (a > b) return -1;
if (a < b) return 1;
return 0;
};
const sortedChatIdsSelector = createSelector(
[getSortedChatIds],
chats => chats,
);
interface IChatList {
onClickChat: (chat: any) => void,
onRefresh: () => void,
}
const ChatList: React.FC<IChatList> = ({ onClickChat, onRefresh }) => {
const dispatch = useDispatch();
const intl = useIntl();
const chatIds = useAppSelector(state => sortedChatIdsSelector(state.chats.get('items')));
const hasMore = useAppSelector(state => !!state.chats.get('next'));
const isLoading = useAppSelector(state => state.chats.get('isLoading'));
return (
<ScrollableList
className='chat-list'
scrollKey='awaiting-approval'
emptyMessage={intl.formatMessage(messages.emptyMessage)}
hasMore={hasMore}
isLoading={isLoading}
showLoading={isLoading && chatIds.size === 0}
onLoadMore={() => handleLoadMore(dispatch)}
onRefresh={onRefresh}
placeholderComponent={PlaceholderChat}
placeholderCount={20}
>
{chatIds.map((chatId: string) => (
<div key={chatId} className='chat-list-item'>
<Chat
chatId={chatId}
onClick={onClickChat}
/>
</div>
))}
</ScrollableList>
);
};
export default ChatList;