RocketChat/Rocket.Chat

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

import { removeUserFromRoom } from '../../../../lib/server/functions/removeUserFromRoom';

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

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

    const room = await Rooms.findOneByName(args.roomName);

    if (!room) {
        throw new Error(`Could not find a room with name ${args.roomName}`);
    }

    this.log(`${user.username} left room ${room.name}`);
    await removeUserFromRoom(room._id, user);
}