e621 Deleted Post Source Opener

Opens the source or the original post link if the post is deleted (and not a duplicate).
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// ==UserScript==
// @name         e621 Deleted Post Source Opener
// @namespace    http://tampermonkey.net/
// @version      1.4
// @description  Opens the source or the original post link if the post is deleted (and not a duplicate).
// @author       Gemini 3
// @match        https://e621.net/posts/*
// @grant        GM_openInTab
// @run-at       document-idle
// ==/UserScript==

(function() {
    'use strict';

    // 1. Проверка на удаление
    const imageContainer = document.querySelector('#image-container');
    const deleteNotice = document.querySelector('.notice-deleted');

    let isDeleted = false;
    if (deleteNotice) {
        isDeleted = true;
    } else if (imageContainer && imageContainer.getAttribute('data-flags')) {
        isDeleted = imageContainer.getAttribute('data-flags').includes('deleted');
    }

    if (!isDeleted) {
        console.log('e621 Deleted Opener: Post is not deleted.');
        return;
    }

    // 2. Проверка причины: не открываем, если это дубликат
    if (deleteNotice) {
        const noticeText = deleteNotice.innerText.toLowerCase();
        if (noticeText.includes('duplicate')) {
             console.log('e621 Deleted Opener: Post is a duplicate. Stopping.');
             return;
        }
    }

    let urlToOpen = null;

    // 3. Пытаемся найти внешнюю ссылку в сайдбаре (Source)
    const externalSourceLinks = document.querySelectorAll('li.source-links .source-link a');
    if (externalSourceLinks.length > 0) {
        urlToOpen = externalSourceLinks[0].href;
        console.log('e621 Deleted Opener: Found external source link.');
    } 
    
    // 4. Если внешнего источника нет (или он не ссылка), ищем внутреннюю ссылку в тексте причины удаления
    if (!urlToOpen && deleteNotice) {
        // Ищем ссылку на другой пост (класс .dtext-post-id-link обычно используется для "post #12345")
        const internalPostLink = deleteNotice.querySelector('a.dtext-post-id-link, a[href^="/posts/"]');
        if (internalPostLink) {
            urlToOpen = internalPostLink.href;
            console.log('e621 Deleted Opener: No external source. Found internal post link in deletion notice.');
        }
    }

    // 5. Открытие ссылки
    if (urlToOpen) {
        console.log(`e621 Deleted Opener: Target found: ${urlToOpen}`);
        setTimeout(() => {
            GM_openInTab(urlToOpen, { active: true });
        }, 500);
    } else {
        console.log('e621 Deleted Opener: No valid source or internal link found.');
    }
})();