KV SCRIPT with Link Remaining

export default { async fetch(request, env) { // Check KV binding if (!env.REDIRECT_KV) { return new Response("KV binding REDIRECT_KV not found", { status: 500, headers: { "content-type": "text/plain; charset=UTF-8", "cache-control": "no-store" } }); } // List of links const links = [ "http://p.pcdelv.com/go/499995/753757/aHR0cHMlM0EvL3d3dy5nZXRmaWxlcy5vbmxpbmUvMjAyNi8wNC9lcHNvbi1sMTIwLXJlc2V0dGVyLmh0bWwlM0ZtJTNEMQ==?cb=3550559454177666.5", "http://p.pcdelv.com/go/499995/753757/aHR0cHMlM0EvL3d3dy5nZXRmaWxlcy5vbmxpbmUvMjAyNi8wNC9jYWxsLW9mLWR1dHktbW9kZXJuLXdhcmZhcmUtMy5odG1sJTNGbSUzRDE=?cb=7801214899022078", "http://p.pcdelv.com/go/499995/753757/aHR0cHMlM0EvL3d3dy5nZXRmaWxlcy5vbmxpbmUvMjAyNi8wNC9jYWxsLW9mLWR1dHktYmxhY2stb3BzLTcuaHRtbCUzRm0lM0Qx?cb=8014652092373101" ]; // Parse query parameter const url = new URL(request.url); const queryKey = url.searchParams.get("key"); const usedKey = "used_links"; let used = []; // Get used links from KV try { const saved = await env.REDIRECT_KV.get(usedKey); used = saved ? JSON.parse(saved) : []; } catch (e) { used = []; } if (!Array.isArray(used)) used = []; used = used.filter(index => Number.isInteger(index) && index >= 0 && index < links.length); const totalLinks = links.length; const usedLinks = used.length; const remainingLinks = totalLinks - usedLinks; // --- Show stats if ?key=aboy --- if (queryKey === "aboy") { const html = ` `; return new Response(html, { headers: { "content-type": "text/html" } }); } // --- Normal random redirect --- const usedSet = new Set(used); let unusedIndexes = links.map((link, index) => index).filter(index => !usedSet.has(index)); if (unusedIndexes.length === 0) { return new Response("NO LINK AVAILABLE", { status: 410, headers: { "content-type": "text/plain; charset=UTF-8", "cache-control": "no-store" } }); } const randomIndex = unusedIndexes[Math.floor(Math.random() * unusedIndexes.length)]; const selectedLink = links[randomIndex]; // Save the used link index used.push(randomIndex); await env.REDIRECT_KV.put(usedKey, JSON.stringify(used)); return Response.redirect(selectedLink, 302); } };