Producer.ai Bulk Metadata Downloader

// ==UserScript==
// @name         Producer.ai Project Batch Downloader (ZIP)
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  Download all song metadata from a project page as a single ZIP
// @match        https://www.producer.ai/project/*
// @grant        none
// @require      https://cdnjs.cloudflare.com/ajax/libs/jszip/3.10.1/jszip.min.js
// ==/UserScript==

(function() {
    'use strict';

    // --- Helper: sanitize filename ---
    function sanitizeFilename(name) {
        return name.replace(/[^a-z0-9_\-]+/gi, "_");
    }

    // --- Extract song GUIDs from page ---
    function getSongIdsFromLinks() {
        const links = Array.from(document.querySelectorAll("a[href^='/song/']"));
        const ids = new Set();
        for (const link of links) {
            const match = link.getAttribute("href").match(/\/song\/([a-f0-9-]+)/);
            if (match) ids.add(match[1]);
        }
        return Array.from(ids);
    }

    // --- Create button ---
    const btn = document.createElement("button");
    btn.textContent = "⬇️ Download All Songs (ZIP)";
    btn.style.position = "fixed";
    btn.style.top = "10px";
    btn.style.right = "10px";
    btn.style.zIndex = 9999;
    btn.style.padding = "8px";
    btn.style.background = "#673AB7";
    btn.style.color = "white";
    btn.style.border = "none";
    btn.style.borderRadius = "4px";
    btn.style.cursor = "pointer";
    document.body.appendChild(btn);

    // --- Button click handler ---
    btn.addEventListener("click", async () => {
        const songIds = getSongIdsFromLinks();
        if (songIds.length === 0) {
            alert("No song links found on this page.");
            return;
        }

        try {
            const response = await fetch("https://www.producer.ai/__api/v2/generations", {
                method: "POST",
                headers: { "Content-Type": "application/json" },
                body: JSON.stringify({ riff_ids: songIds })
            });

            if (!response.ok) throw new Error("Network response was not ok");

            const json = await response.json();
            const generations = json.generations || [];

            if (generations.length === 0) {
                alert("No generation data returned.");
                return;
            }

            const zip = new JSZip();

            for (const gen of generations) {
                const title = gen.title ? sanitizeFilename(gen.title) : gen.id;
                const filename = `${title}.json`;
                zip.file(filename, JSON.stringify(gen, null, 2));
            }

            // Generate ZIP and trigger download
            const blob = await zip.generateAsync({ type: "blob" });
            const url = URL.createObjectURL(blob);
            const a = document.createElement("a");
            a.href = url;
            a.download = "project_songs.zip";
            a.click();
            URL.revokeObjectURL(url);

            alert(`Downloaded ${generations.length} songs into project_songs.zip`);

        } catch (err) {
            console.error("Error fetching batch data:", err);
            alert("Failed to fetch song data. See console for details.");
        }
    });
})();