src/routes/sitemap.xml/+server.js

const getAllModels = async () => {
	const response = await fetch("https://lorastudio.co/api/models/sitemap", {
		method: "GET",
		headers: {
			"Content-Type": "application/json"
		}
	})
	const models = await response.json()

	return models.cards

};
export async function GET() {
	const models = await getAllModels()
	return new Response(
		`
		<?xml version="1.0" encoding="UTF-8" ?>
		<urlset
			xmlns="https://www.sitemaps.org/schemas/sitemap/0.9"
			xmlns:xhtml="https://www.w3.org/1999/xhtml"
			xmlns:mobile="https://www.google.com/schemas/sitemap-mobile/1.0"
			xmlns:news="https://www.google.com/schemas/sitemap-news/0.9"
			xmlns:image="https://www.google.com/schemas/sitemap-image/1.1"
			xmlns:video="https://www.google.com/schemas/sitemap-video/1.1"
		>
			<url>
				<loc>https://lorastudio.co/</loc>
				<lastmod>${new Date().toISOString()}</lastmod>
			</url>
			${models
			.map(
          (model) =>
            `
      <url>
        <loc>https://lorastudio.co/models/${model.id}</loc>
        <lastmod>${new Date(model.createdAt).toISOString()}</lastmod>
      </url>
      `
        )
        .join("")}
			<!-- <url> elements go here -->
		</urlset>`.trim(),
		{
			headers: {
				'Content-Type': 'application/xml'
			}
		}
	);
}