Node.js:TCPベースtelnet端末チャット

var net=require('net'),
    count = 0, //people total
    users={};
var server= net.createServer(function(conn){
    conn.setEncoding('utf8'); // 
    var nickname;
    conn.write('
>Welcome to \033[91m node-chat!\033[39m'
    +'
 > \033[95m   '+count+'\033[39m  .'
    +'
 >   : '
    );
    count++; // 
    conn.on('data',function(data){
        data=data.replace('\r
','');// 
        if(!nickname){ // 
            if(users[data]){
                conn.write('\033[93m> , :\033[39m');
                return;
            }else{
                nickname=data;
                users[nickname]=conn;
                for(var i in users){
                    users[i].write('\033[90m >'+nickname+'   \033[39m
');
                }
            }
        }else{
            for(var i  in users){
              if(i != nickname){
                  users[i].write('\033[94m> '+nickname+' say: \033[39m'+data+'
');
              }
            }
        }
    });
    conn.on('close',function(){
        count--;
        delete users[nickname];  // 
    }); //close connection count--
});

server.listen(3000,function(){
    console.log('\033[96m server listening on *:3000\033[39m');
});