feat(seo): add JSON-LD, OG images and RSS feed for news

src/lib/news-rss.ts

@@ -0,0 +1,72 @@
+import { absoluteAssetUrl, escapeXml } from "@/lib/seo";
+
+export interface NewsRssItem {
+	slug: string;
+	title: string;
+	shortStory: string;
+	image: string;
+	createdAt: Date | null;
+}
+
+function imageMime(url: string): string {
+	const extension = url.split("?")[0]?.split(".").pop()?.toLowerCase();
+	switch (extension) {
+		case "png":
+			return "image/png";
+		case "gif":
+			return "image/gif";
+		case "webp":
+			return "image/webp";
+		case "avif":
+			return "image/avif";
+		default:
+			return "image/jpeg";
+	}
+}
+
+/** Build a standards-compliant RSS 2.0 feed for the public news archive. */
+export function buildNewsRss(
+	items: NewsRssItem[],
+	options: { hotelName: string; appUrl: string; now?: Date },
+): string {
+	const base = options.appUrl.replace(/\/+$/, "");
+	const now = options.now ?? new Date();
+
+	const entries = items
+		.map((item) => {
+			const url = `${base}/news/${encodeURIComponent(item.slug)}`;
+			const image = absoluteAssetUrl(item.image, base);
+			return [
+				"<item>",
+				`<title>${escapeXml(item.title)}</title>`,
+				`<link>${escapeXml(url)}</link>`,
+				`<guid isPermaLink="true">${escapeXml(url)}</guid>`,
+				item.createdAt
+					? `<pubDate>${item.createdAt.toUTCString()}</pubDate>`
+					: "",
+				`<description>${escapeXml(item.shortStory)}</description>`,
+				image
+					? `<enclosure url="${escapeXml(image)}" type="${imageMime(image)}" length="0" />`
+					: "",
+				"</item>",
+			]
+				.filter(Boolean)
+				.join("");
+		})
+		.join("");
+
+	return [
+		'<?xml version="1.0" encoding="UTF-8"?>',
+		'<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">',
+		"<channel>",
+		`<title>${escapeXml(`${options.hotelName} — News`)}</title>`,
+		`<link>${escapeXml(`${base}/news`)}</link>`,
+		`<description>${escapeXml(`Latest news from ${options.hotelName}`)}</description>`,
+		"<language>en</language>",
+		`<atom:link href="${escapeXml(`${base}/news/rss.xml`)}" rel="self" type="application/rss+xml" />`,
+		`<lastBuildDate>${now.toUTCString()}</lastBuildDate>`,
+		entries,
+		"</channel>",
+		"</rss>",
+	].join("");
+}