ChessCom Variants: Private arrows

Prevent your arrows from being shared with spectators

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

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

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

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

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

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.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         ChessCom Variants: Private arrows
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Prevent your arrows from being shared with spectators
// @author       CzEclipsia discord@cz_eclipsia
// @match        *://*.chess.com/variants*
// @icon         https://www.chess.com/favicon.ico
// @grant        none
// @run-at       document-start
// @license      MIT
// ==/UserScript==

(function () {
    'use strict';

    const TARGET = "wss://variants.gcp-prod.chess.com";
    const windowWebSocket = window.WebSocket;

    window.WebSocket.prototype.sendMessage = function(json) {
        const data = JSON.stringify(json);
        const event = new MessageEvent('message', {data});
        this.dispatchEvent(event);
    };

    window.WebSocket = function (url, protocols) {
        const ws = protocols
            ? new windowWebSocket(url, protocols)
            : new windowWebSocket(url);

        if (typeof url === "string" && url.startsWith(TARGET)) {
            const wsSend = ws.send;
            ws.send = function(data) {
                try {
                    const json = JSON.parse(data);
                    if (json.action == "game" && json.data.action == "draw-arrow") {
                        return ws.sendMessage({
                            mutation: "new_arrow",
                            data: json.data
                        });
                    }
                } catch {}

                wsSend.call(ws, data);
            };
        }

        return ws;
    };

    window.WebSocket.prototype = windowWebSocket.prototype;
})();