feat: split sitemap

backend/src/app/sitemap-index.xml/route.ts

@@ -0,0 +1,24 @@
+import { prisma } from "@/lib/prisma";
+import { CHUNK_SIZE } from "../sitemap";
+import { NextResponse } from "next/server";
+
+export async function GET() {
+	const baseUrl = process.env.NEXT_PUBLIC_FRONTEND_URL!;
+
+	const total = await prisma.mii.count({
+		where: { in_queue: false, quarantined: false },
+	});
+	const miiChunks = Math.ceil(total / CHUNK_SIZE);
+	const totalSitemaps = miiChunks + 1; // +1 for the static-routes sitemap
+
+	const sitemapEntries = Array.from({ length: totalSitemaps }, (_, i) => `<sitemap><loc>${baseUrl}/sitemap/${i}.xml</loc></sitemap>`).join("");
+
+	const xml = `<?xml version="1.0" encoding="UTF-8"?>
+<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+${sitemapEntries}
+</sitemapindex>`;
+
+	return new NextResponse(xml, {
+		headers: { "Content-Type": "application/xml" },
+	});
+}