RocketChat/Rocket.Chat

import { Users } from '@rocket.chat/models';

import { notifyOnUserChange } from '../../../../lib/server/lib/notifyListener';

export default async function handleNickChanged(args) {
    const user = await Users.findOne({
        'profile.irc.nick': args.nick,
    });

    if (!user) {
        throw new Error(`Could not find an user with nick ${args.nick}`);
    }

    this.log(`${user.username} changed nick: ${args.nick} -> ${args.newNick}`);

    // Update on the database
    await Users.updateOne(
        { _id: user._id },
        {
            $set: {
                'name': args.newNick,
                'profile.irc.nick': args.newNick,
            },
        },
    );

    void notifyOnUserChange({ clientAction: 'updated', id: user._id, diff: { name: args.newNick } });
}