userscripts/chatgpt-chat-prefixer/ChatGPTChatPrefixer.user.js

// ==UserScript==
// @name         Prefix ChatGPT chats with "S:"
// @namespace    http://tampermonkey.net/
// @version      2024-11-23T16:20:49+05:30
// @description  For TOTALLY legit usage reasons...
// @match        https://chatgpt.com/*
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_registerMenuCommand
// ==/UserScript==

(function() {
    'use strict';

    GM_registerMenuCommand('Set Prefix', setPrefix);

    function setPrefix() {
        const currentPrefix = GM_getValue('PREFIX', 'S: ');
        const newPrefix = prompt('Enter the new prefix:', currentPrefix);
        if (newPrefix !== null) {
            GM_setValue('PREFIX', newPrefix);
            alert('Prefix set to: ' + newPrefix);
        }
    }

    function getPrefix() {
        return GM_getValue('PREFIX', 'S: ');
    }

    const sels = {
        activeChatSidebarItem: '[data-testid^="history-item"]:has(> [class~="bg-token-sidebar-surface-secondary"])',
        renamePopoverItem: '[data-testid="share-chat-menu-item"] + div',
    };

    function triggerEnterKey(el) {
        const event = new KeyboardEvent('keydown', {
            key: 'Enter',
            code: 'Enter',
            bubbles: true
        });

        el.dispatchEvent(event);
    }

    function wait(ms) {
        return new Promise(resolve => setTimeout(resolve, ms));
    }

    async function getStableLabelText(el) {
        while (true) {
            const prev = el.textContent.trim();
            await wait(1000);
            const curr = el.textContent.trim();

            if (prev === curr) {
                return curr;
            }
        }
    }

    async function main() {
        try {
            const menuItem = document.querySelector(sels.activeChatSidebarItem);

            if (!menuItem) {
                console.log("Active chat menu item wasn't found. You're either not on the regular chat page or the markup has changed");
                return;
            }

            const label = await getStableLabelText(menuItem.querySelector("a"));

            if (/new chat/i.test(label)) {
                console.log("Chat label isn't yet autopopulated by LLM");
                return;
            }

            const prefix = getPrefix();

            if (label.startsWith(prefix)) {
                console.log("No need to rename chat");
                return;
            }

            triggerEnterKey(menuItem.querySelector("button"));
            await wait(100);

            document.querySelector(sels.renamePopoverItem).click();
            await wait(500);

            const input = menuItem.querySelector("input");
            const prevValue = input.value;

            input.focus();
            await wait(100);

            input.value = `${prefix}${label}`;

            if (input._valueTracker) {
                input._valueTracker.setValue(prevValue);
            }

            const inputEvent = new Event('input', { bubbles: true });
            input.dispatchEvent(inputEvent);

            triggerEnterKey(input);
            await wait(100);

            console.log("Renamed chat");
        } finally {
            setTimeout(main, 5000);
        }
    }

    setTimeout(main, 5000);
})();