Добавляем на author.today ссылки на fantlab

Добавляем на author.today ссылки на поиск fantlab
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// ==UserScript==
// @name        Добавляем на author.today ссылки на fantlab
// @namespace   Azazar's Scripts
// @match       https://author.today/*
// @grant       GM_addStyle
// @version     1.1
// @description Добавляем на author.today ссылки на поиск fantlab
// @license     MIT
// ==/UserScript==

(function() {
    'use strict';

    /**
     * Checks if all children of a DOM element are text nodes.
     *
     * @param {Element} domElement - The DOM element to check.
     * @return {boolean} - Returns true if all children are text nodes, otherwise false.
     */
    function isTextOnly(domElement) {
        const childNodes = domElement.childNodes;
        if (childNodes.length === 0) {
            return false;
        }
        for (let i = 0; i < childNodes.length; i++) {
            if (childNodes[i].nodeType !== Node.TEXT_NODE) {
                return false;
            }
        }
        return true;
    }

    function addFantlabLinks(root) {
        root.querySelectorAll('.feed .feed-row, .bookcard, .book-row').forEach(feedRowElement => {
            if (feedRowElement.fantlabLinksAdded) {
                return;
            }
            feedRowElement.fantlabLinksAdded = true;

            let authors = new Set();
            let anchors = Array.from(feedRowElement.querySelectorAll('a[href]')).filter(a => isTextOnly(a) && !a.fantlabLinksAdded);

            anchors.forEach(anchorElement => {
                let href = anchorElement.getAttribute('href');
                let userMatch = /^\/u\/([^\/]+)/.exec(href);

                if (userMatch) {
                    authors.add(anchorElement.textContent.trim());
                    anchorElement.insertAdjacentHTML('afterend', `<a class="userscript-fl" href="https://fantlab.ru/searchmain?searchstr=${encodeURIComponent(anchorElement.textContent.trim())}"><img src="https://fantlab.ru/favicon.ico"></a>`);
                }
            });

            anchors.forEach(anchorElement => {
                let href = anchorElement.getAttribute('href');
                let workMatch = /^\/work\/(\d+)/.exec(href);

                if (workMatch) {
                    anchorElement.insertAdjacentHTML('afterend', `<a class="userscript-fl" href="https://fantlab.ru/searchmain?searchstr=${encodeURIComponent(anchorElement.textContent.trim() + ' ' + Array.from(authors).join(' '))}"><img src="https://fantlab.ru/favicon.ico"></a>`);
                }
            });

            anchors.forEach(anchorElement => anchorElement.fantlabLinksAdded = true);
        });
    }

    GM_addStyle('.userscript-fl img { margin-left: 5px; vertical-align: middle; height: 1em }');

    addFantlabLinks(document.body);

    const observer = new MutationObserver(mutations => {
        mutations.forEach(mutation => {
            mutation.addedNodes.forEach(node => {
                if (node.nodeType === Node.ELEMENT_NODE) {
                    addFantlabLinks(node);
                }
            });
        });
    });

    observer.observe(document.body, {
        childList: true,
        subtree: true
    });
})();