added xml feed for blogs

src/routes/blog/feed.xml/+server.ts

@@ -0,0 +1,38 @@
+export const prerender = true;
+import { posts, type BlogPostDetails } from "../posts";
+
+const xml = (tposts: Map<string, BlogPostDetails>) => `<rss version="2.0">
+<channel>
+	<title>denizk0461's Blog</title>
+	<link>https://denizk0461.dev/blog/</link>
+	<description><![CDATA[denizk0461 blogs about stuff here]]></description>
+	${getEntries()}
+</channel>
+</rss>`;
+
+function getEntries(): String {
+	var val = "";
+	var entries = posts.entries().map((post, index) => 
+	`<item>
+		<title><![CDATA[${post[1].title}]]></title>
+		<description><![CDATA[${post[1].description}]]></description>
+		<link>https://denizk0461.dev/blog/${post[0]}</link>
+		<guid isPermaLink="true">https://denizk0461.dev/blog/${post[0]}</guid>
+		<pubDate><![CDATA[${new Date(`${post[1].date}T${post[1].time}`).toUTCString()}]]></pubDate>
+	</item>
+	`)
+	entries.forEach(entry => {
+		val += entry;
+	})
+	return val;
+}
+
+// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
+export async function GET() {
+	const headers = {
+		'Cache-Control': 'max-age=0, s-maxage=600',
+		'Content-Type': 'application/xml',
+	};
+	const body = xml(posts);
+	return new Response(body);
+}