twitter-limit-userscript.js

// ==UserScript==
// @name         Twitter Time Limit
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Limit Twitter usage
// @author       adrian154
// @match        https://x.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=twitter.com
// @grant        GM_setValue
// @grant        GM_getValue
// ==/UserScript==

(function () {
    'use strict';

    const TIME_LIMIT = 30*60; // 45 min

    const lockout = () => {

        const lockoutElem = document.createElement("div");
        lockoutElem.style.position = "fixed";
        lockoutElem.style.left = "0";
        lockoutElem.style.top = "0";
        lockoutElem.style.backgroundColor = "#ff0000";
        lockoutElem.style.width = "100vw";
        lockoutElem.style.height = "100vh";
        lockoutElem.style.display = "flex";
        document.body.append(lockoutElem);

        const lockoutInner = document.createElement("div");
        lockoutInner.style.margin = "auto";
        lockoutElem.append(lockoutInner);

        const lockoutText = document.createElement("h1");
        lockoutText.textContent = "Twitter Time Limit Reached";
        lockoutInner.append(lockoutText);


    };

    let timeSpent = GM_getValue("twitter_time", 0);
    const timeTrackingDay = new Date(GM_getValue("twitter_time_date", 0));

    // if in a new day, reset twitter tracking time.
    const today = new Date();
    if(today.getDate() != timeTrackingDay.getDate()) { // sort of crude - can fail if you go a whole month without opening the site
        timeSpent = 0;
        GM_setValue("twitter_time_date", Date.now());
    }

    const tick = () => {
        
        if(timeSpent > TIME_LIMIT) {
            lockout();
            return;
        }

        timeSpent++;
        GM_setValue("twitter_time", timeSpent);
        setTimeout(tick, 1000);

    };

    tick();

})();