Quick and dirty Udio metadata downloader

// ==UserScript==
// @name         Udio Lyrics Auto Downloader (with prompt + tags + created-at + author)
// @namespace    http://tampermonkey.net/
// @version      2.1
// @description  Auto-download lyrics from Udio song pages, with title, optional prompt, tags, created-at, and author. Uses URL ID in filename, waits for lyrics, shows indicator, and polls URL for SPA navigation.
// @author       Microsoft Copilot
// @match        https://www.udio.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function sanitizeFilename(name) {
        return name.replace(/[\\/:*?"<>|]/g, "_");
    }

    function showIndicator(message, success = true) {
        const indicator = document.createElement("div");
        indicator.textContent = message;
        indicator.style.position = "fixed";
        indicator.style.top = "20px";
        indicator.style.left = "50%";
        indicator.style.transform = "translateX(-50%)";
        indicator.style.padding = "12px 20px";
        indicator.style.fontSize = "18px";
        indicator.style.fontWeight = "bold";
        indicator.style.color = success ? "#fff" : "#000";
        indicator.style.background = success ? "green" : "red";
        indicator.style.border = "3px solid black";
        indicator.style.zIndex = "99999";
        indicator.style.borderRadius = "6px";
        indicator.style.boxShadow = "0 0 10px rgba(0,0,0,0.5)";
        indicator.style.opacity = "1";
        indicator.style.transition = "opacity 1s ease-out";

        document.body.appendChild(indicator);

        setTimeout(() => {
            indicator.style.opacity = "0";
            setTimeout(() => indicator.remove(), 1000);
        }, 3000);
    }

    function waitForLyricsAndDownload(maxWaitMs = 15000, intervalMs = 300) {
        const start = Date.now();

        const check = () => {
            const titleEls = document.querySelectorAll("h1.truncate-2-lines");
            const lyricCandidates = Array.from(document.querySelectorAll("pre.whitespace-pre-wrap"))
                .map(el => el.textContent.trim())
                .filter(text => text.length > 0);

            if (titleEls.length === 1 && lyricCandidates.length >= 1) {
                const title = titleEls[0].textContent.trim();
                const lyrics = lyricCandidates[0];

                // Optional: Prompt
                let promptLine = "";
                const promptSpan = Array.from(document.querySelectorAll("span"))
                    .map(el => el.textContent.trim())
                    .find(text => text.startsWith("Prompt:"));
                if (promptSpan) {
                    promptLine = promptSpan;
                }

                // Optional: Tags
                const tags = Array.from(document.querySelectorAll("a[href^='/tags/'] span"))
                    .map(el => el.textContent.trim())
                    .filter(t => t.length > 0);
                let tagsLine = "";
                if (tags.length > 0) {
                    tagsLine = "Tags: " + tags.join(", ");
                }

                // Optional: Created at
                let createdLine = "";
                const createdDiv = Array.from(document.querySelectorAll("div[title^='Created at ']"))
                    .map(el => el.getAttribute("title"))
                    .find(t => t && t.startsWith("Created at "));
                if (createdDiv) {
                    createdLine = createdDiv;
                }

                // Optional: Author from meta og:title
                let authorLine = "";
                const meta = document.querySelector("meta[property='og:title']");
                if (meta) {
                    const content = meta.getAttribute("content") || "";
                    const parts = content.split(" - ");
                    if (parts.length > 1) {
                        authorLine = "Author: " + parts[0].trim();
                    }
                }

                // Build content
                let content = `Title: ${title}\n`;
                if (authorLine) content += `${authorLine}\n`;
                if (promptLine) content += `${promptLine}\n`;
                if (tagsLine) content += `${tagsLine}\n`;
                if (createdLine) content += `${createdLine}\n`;
                content += `\n${lyrics}`;

                // Save file
                const blob = new Blob([content], { type: "text/plain" });
                const url = URL.createObjectURL(blob);

                const safeTitle = sanitizeFilename(title);
                const pathParts = window.location.pathname.split("/");
                const uniqueId = pathParts[pathParts.length - 1];
                const filename = `${safeTitle} [${uniqueId}].txt`;

                const a = document.createElement("a");
                a.href = url;
                a.download = filename;
                document.body.appendChild(a);
                a.click();
                document.body.removeChild(a);
                URL.revokeObjectURL(url);

                console.log("Saved:", filename);
                showIndicator("✅ Lyrics Saved", true);
                return;
            }

            if (Date.now() - start < maxWaitMs) {
                setTimeout(check, intervalMs);
            } else {
                showIndicator("❌ Lyrics not loaded", false);
            }
        };

        check();
    }

    // Poll for URL changes every half second
    let lastUrl = location.href;
    setInterval(() => {
        const currentUrl = location.href;
        if (currentUrl !== lastUrl) {
            lastUrl = currentUrl;
            if (/^https:\/\/www\.udio\.com\/songs\//.test(currentUrl)) {
                waitForLyricsAndDownload();
            }
        }
    }, 500);

    // Also run immediately if we land directly on a song page
    if (/^https:\/\/www\.udio\.com\/songs\//.test(location.href)) {
        waitForLyricsAndDownload();
    }
})();