20. 자동 읽음 처리.js

var count = {};

function response(room, msg, sender, isGroupChat, replier) {
    if (count[room] == undefined) {
        count[room] = 0;
    }
    count[room]++;
    
    if (count[room] > 100) {
        replier.markAsRead();
        count[room] = 0;
    }
    
}