Kahoot Namerator and Name Length Bypass

Bypasses kahoot nickname generator as well as the maximum name length

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name        Kahoot Namerator and Name Length Bypass
// @author      slither
// @version     2.3.0
// @license     MIT
// @description Bypasses kahoot nickname generator as well as the maximum name length
// @match       https://kahoot.it/*
// @grant       none
// @run-at      document-start
// @namespace   https://greasyfork.org/users/964173
// ==/UserScript==

let nick = "";

const nativeSend = XMLHttpRequest.prototype.send;
XMLHttpRequest.prototype.send = function() {
    const oldCallback = this.onreadystatechange;

    this.onreadystatechange = function() {
        if (this.readyState === 4) {
            try {
                const response = JSON.parse(this.responseText);

                if (response.namerator === true)
                    response.namerator = false;

                Object.defineProperty(this, "responseText",{
                    writable: false,
                    configurable: true,
                    value: JSON.stringify(response)
                });
            } catch (e) {
                console.error(e);
            }
        }

        if (oldCallback)
            return oldCallback.apply(this, arguments);
    };

    return nativeSend.apply(this, arguments);
};

const nativeWebSocket = window.WebSocket;
window.WebSocket = function() {
    const ws = new nativeWebSocket(...arguments);
    const nativeSend = ws.send;

    ws.send = function() {
        const interceptedMessage = JSON.parse(arguments[0]);

        if (interceptedMessage[0] && interceptedMessage[0].data) {
            if (JSON.parse(interceptedMessage[0].data.content).usingNamerator === false)
                interceptedMessage[0].data.content = JSON.stringify({ ...JSON.parse(interceptedMessage[0].data.content), usingNamerator: true });

            if (nick && interceptedMessage[0].data.name) {
                interceptedMessage[0].data.name = nick;
                nick = "";
            }
        }

        return nativeSend.apply(this, [JSON.stringify(interceptedMessage)]);
    };

    return ws;
};

const nativePushState = history.pushState;
history.pushState = function() {
    const ret = nativePushState.apply(history, arguments);

    if (location.href.includes("kahoot.it/join")) {
        const observer = new MutationObserver(function() {
            if (document.getElementById("nickname")) {
                const input = document.createElement("input");
                const nickname = document.getElementById("nickname");
                const reactProps = Object.keys(nickname).find(v => v.includes("__reactProps"));
                input.className = nickname.className;
                input.type = "text";
                input.placeholder = "Nickname";
                nickname.replaceWith(input);

                input.nextElementSibling.addEventListener("click", function() {
                    nick = input.value;
                    nickname[reactProps].onChange({ target: { value: nick.slice(0, 15) } });
                });

                observer.disconnect();
            }
        });

        observer.observe(document.body, {
            childList: true,
            subtree: true
        });
    }

    return ret;
};