如何通过频道名称关闭连接(踢用户)

const express = require('express');
const http = require('http');
const socketIo = require('socket.io');

const app = express();
const server = http.createServer(app);
const io = socketIo(server);

// 存储频道和用户的关系
const channelUsers = {};

io.on('connection', (socket) => {
    console.log('A user connected');

    socket.on('join', (channelName) => {
        if (!channelUsers[channelName]) {
            channelUsers[channelName] = new Set();
        }
        channelUsers[channelName].add(socket.id);
        socket.join(channelName);
    });

    socket.on('disconnect', () => {
        for (let channelName in channelUsers) {
            if (channelUsers[channelName].has(socket.id)) {
                channelUsers[channelName].delete(socket.id);
            }
        }
    });
});

function kickUser(channelName, userId) {
    if (channelUsers[channelName] && channelUsers[channelName].has(userId)) {
        io.to(userId).emit('kick', 'You have been kicked from the channel.');
        io.sockets.sockets.get(userId).leave(channelName);
        channelUsers[channelName].delete(userId);
        console.log(`User ${userId} kicked from ${channelName}`);
    } else {
        console.log(`User ${userId} not found in ${channelName}`);
    }
}

server.listen(3000, () => {
    console.log('Server is running on port 3000');
});