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VOZ - Remove tag [HN]

VOZ - Remove tag [HN] in the alert page

// ==UserScript==
// @name         VOZ - Remove tag [HN]
// @version              0.1.7
// @namespace    VOZ
// @description  VOZ - Remove tag [HN] in the alert page
// @author       N.Duong
// @license              MIT
// @match        https://voz.vn/*
// @run-at               document-start
// @icon         https://www.google.com/s2/favicons?sz=64&domain=voz.vn
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function safeQuery(selector) {
        try {
            return document.querySelector(selector);
        } catch (err) {
            console.error(`Query failed for selector: ${selector}`, err);
            return null;
        }
    }

    function safeRemoveHNItems() {
        try {
            const items = document.querySelectorAll('li[data-alert-id]');
            items.forEach(item => {
                try {
                    const labelSpan = item.querySelector('span.label.label--green');
                    if (labelSpan && labelSpan.textContent.trim() === 'HN') {
                        item.remove();
                    }
                } catch (err) {
                    console.warn('Error checking/removing item:', err);
                }
            });
        } catch (err) {
            console.error('Error removing HN items:', err);
        }
    }

    function tryInjectBadge() {
        let attempts = 0;
        const maxAttempts = 10;
        const intervalMs = 500;

        const retryInterval = setInterval(() => {
            attempts++;

            try {
                const alertLink = safeQuery('a[data-nav-id="ALERTS"]');
                const numberOfAlert = safeQuery('a[href="/account/alerts"]');

                if (alertLink && numberOfAlert) {
                    clearInterval(retryInterval);

                    const badgeValue = numberOfAlert.getAttribute('data-badge') || '0';
                    console.log("FOUND ALERTS link, badge =", badgeValue);

                    const badge = document.createElement('span');
                    badge.textContent = badgeValue;
                    badge.className = 'vn-alert-badge';
                    badge.style.cssText = `
                        background: red;
                        color: white;
                        border-radius: 21%;
                        padding: 2px 6px;
                        font-size: 12px;
                        margin-left: 6px;
                    `;
                    alertLink.appendChild(badge);
                }

                if (attempts >= maxAttempts) {
                    clearInterval(retryInterval);
                    console.warn("ALERTS link not found after 10 attempts.");
                }
            } catch (err) {
                console.error('Error during badge injection attempt:', err);
            }
        }, intervalMs);
    }

    window.addEventListener('DOMContentLoaded', () => {
        try {
            safeRemoveHNItems();
            tryInjectBadge();
        } catch (err) {
            console.error('Unexpected error in main handler:', err);
        }
    });
})();