feat: rss.xml feed implemented

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

@@ -0,0 +1,64 @@
+import * as config from '$lib/config';
+
+/**
+ * Indicates whether prerendering is enabled.
+ * @type {boolean}
+ */
+export const prerender = true;
+
+/** @type {import('./$types').RequestHandler} */
+export async function GET({ url, fetch }) {
+	const posts = await fetch('/posts.json').then((res) => res.json());
+	const pages = await fetch('/pages.json').then((res) => res.json());
+	const staticPages = ['agenda', 'archiv', 'blog', 'credits', 'partner'];
+
+	let rss = '<?xml version="1.0" encoding="UTF-8"?>';
+	rss += '<rss version="2.0">';
+	rss += '<channel>';
+	rss += `<title>${config.title}</title>`;
+	rss += `<link>${url.origin}</link>`;
+	rss += `<description>${config.description}</description>`;
+	rss += `<language>${config.lang}</language>`;
+
+	posts.forEach((post) => {
+		rss += `<item>`;
+		rss += `<title>${post.title}</title>`;
+		rss += `<link>${url.origin}/blog/${post.slug}</link>`;
+		rss += `<guid>${url.origin}/blog/${post.slug}</guid>`;
+		rss += `<pubDate>${new Date(post.date).toUTCString()}</pubDate>`;
+		rss += `<lastBuildDate>${new Date(post.modified).toUTCString()}</lastBuildDate>`;
+		rss += `<description>${post.excerpt}</description>`;
+		rss += `</item>`;
+	});
+
+	pages.forEach((page) => {
+		rss += `<item>`;
+		rss += `<title>${page.title}</title>`;
+		rss += `<link>${url.origin}/${page.slug}</link>`;
+		rss += `<guid>${url.origin}/${page.slug}</guid>`;
+		rss += `<pubDate>${new Date(page.date).toUTCString()}</pubDate>`;
+		rss += `<lastBuildDate>${new Date(page.modified).toUTCString()}</lastBuildDate>`;
+		rss += `<description>${page.excerpt}</description>`;
+		rss += `</item>`;
+	});
+
+	staticPages.forEach((page) => {
+		rss += `<item>`;
+		rss += `<title>${page}</title>`;
+		rss += `<link>${url.origin}/${page}</link>`;
+		rss += `<guid>${url.origin}/${page}</guid>`;
+		rss += `<pubDate>${new Date().toUTCString()}</pubDate>`;
+		rss += `<lastBuildDate>${new Date().toUTCString()}</lastBuildDate>`;
+		rss += `<description>${page}</description>`;
+		rss += `</item>`;
+	});
+
+	rss += `</channel>`;
+	rss += `</rss>`;
+
+	return new Response(rss, {
+		headers: {
+			'Content-Type': 'application/rss+xml; charset=utf-8'
+		}
+	});
+}