Hide Useless Blogs

// ==UserScript==
// @name         Hide Low Rated Author Blogs and Contest Announcements Blogs in Recent Actions (Codeforces)
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Hide blog entries in the sidebar from authors with specific titles (e.g., "Newbie", "Pupil")
// @author       You
// @match        https://codeforces.com/*
// @connect      codeforces.com
// ==/UserScript==

(function() {
    'use strict';

    const threshhold_title = ['Newbie', 'Pupil'];

    function hideblogs() {
        const list = document.querySelectorAll('.recent-actions ul li');

        list.forEach((action) => {
            const userlink = action.querySelector('a.rated-user');
            const curr_title = userlink.getAttribute('title');
            const tohide = threshhold_title.some(title => curr_title && curr_title.includes(title));
            if (tohide) {
                action.style.display = "none";
            }
            else {
                const blogTitleElement = action.querySelector('a[href^="/blog/entry"]');
                const blogTitle = blogTitleElement ? blogTitleElement.textContent : '';

                if (blogTitle.includes("Codeforces Round") | blogTitle.includes("cheater") | blogTitle.includes("ban") | blogTitle.includes("cheaters")) {
                    action.style.display = "none";
                }
            }
        });
    }

    const observer = new MutationObserver(() => {
        hideblogs();
    });

    observer.observe(document.querySelector('.recent-actions'), {
        childList: true,
        subtree: true
    });

    hideblogs();
})();