RocketChat/Rocket.Chat

import { useStream, useUserId } from '@rocket.chat/ui-contexts';
import { useEffect } from 'react';

import { ChatMessage } from '../../../../app/models/client';

export const useDeleteUser = () => {
    const notify = useStream('notify-logged');

    const uid = useUserId();
    useEffect(() => {
        if (!uid) {
            return;
        }
        return notify('Users:Deleted', ({ userId, messageErasureType, replaceByUser }) => {
            if (messageErasureType === 'Unlink' && replaceByUser) {
                return ChatMessage.update(
                    {
                        'u._id': userId,
                    },
                    {
                        $set: {
                            'alias': replaceByUser.alias,
                            'u._id': replaceByUser._id,
                            'u.username': replaceByUser.username,
                            'u.name': undefined,
                        },
                    },
                    { multi: true },
                );
            }
            ChatMessage.remove({
                'u._id': userId,
            });
        });
    }, [notify, uid]);
};