问在节点js中创建私有聊天，并且无法将消息发送到特定的套接字id。

EN

'use strict';
var model = require('../model/model.js');

class Socket{
    constructor(socket){
        this.io = socket;
        this.users = [];
    }

    socketEvents(){ 
        this.io.on('connection', (socket) => {
            socket.on('username', (data) => {

                this.users.push({
                    id : socket.id,
                    userName : data.username
                });

                model.login(data);

                let len = this.users.length;
                len--;

                model.addSocketId( data.username,this.users[len].id);

                this.io.emit('userList',this.users,this.users[len].id); 
            });

            socket.on('getMsg', (data) => {
                model.insertMessages({
                        fromUserId: data.fromUserId,
                        toUserId: data.toUserId,
                        message: data.msg
                });
                console.log("socket id is:");
                console.log(data.toid);
                socket.broadcast.to(data.toid).emit('sendMsg',{
                    msg:data.msg,
                    name:data.name
                });

            });

            socket.on('disconnect',()=>{
                for(let i=0; i < this.users.length; i++){
                    if(this.users[i].id === socket.id){
                        this.users.splice(i,1); 
                    }
                }
                this.io.emit('exit',this.users); 
            });
        });
    }

    socketConfig(){
        this.socketEvents();
    }
}
module.exports = Socket;


Below is my Client Side File:

<script src="/socket.io/socket.io.js"></script>
<script type="text/javascript">
    var socket = io.connect("http://192.168.1.12:3000");

    socket.on('sendMsg', (data) => {
        console.log("send message-list");
        $('#message-list').append("<li class='friend-user'>"+data.msg+"</li>");
    });

    socket.on('userList', (completeUserList,userSocketId) => {
       console.log('userlist function');
       var userList = completeUserList;
    });
</script>