feat: Re-add RSS 2.0 Feed

src/app/feed.xml/route.ts

@@ -0,0 +1,110 @@
+import { Feed } from "feed";
+import { releaseNotes } from "@/lib/release-notes";
+import type { ReleaseNote } from "@/lib/release-notes";
+
+// Force feed.xml to be cached as static and remain constant for the lifetime of the current site build.
+// The supplied releaseNotes array is constant per build, so this will always be the latest release notes.
+export const dynamic = "force-static";
+
+/** The default number of entries to include in the RSS feed. */
+const RSS_ENTRY_LIMIT = 20;
+
+/**
+ * Handles the GET request for the `feed.xml` endpoint.
+ * @returns The RSS feed for the Zen Browser release notes.
+ */
+export async function GET() {
+    // Just in case the release notes array is empty for whatever reason.
+    const latestDate = releaseNotes.length > 0
+        ? formatRssDate(releaseNotes[0].date)
+        : new Date();
+
+    const feed = new Feed({
+        id: "https://www.zen-browser.app/release-notes",
+        link: "https://www.zen-browser.app/release-notes",
+        title: "Zen Browser Release Notes",
+        description: "Release Notes for the Zen Browser",
+        language: "en",
+        favicon: "https://www.zen-browser.app/favicon.ico",
+        copyright: `Zen Browser © ${new Date().getFullYear()} - Made with ❤️ by the Zen team.`,
+        updated: latestDate,
+    });
+
+    for (const releaseNote of releaseNotes.slice(0, RSS_ENTRY_LIMIT)) {
+        feed.addItem({
+            title: `Release notes for version ${releaseNote.version}`,
+            id: `https://www.zen-browser.app/release-notes/${releaseNote.version}`,
+            link: `https://www.zen-browser.app/release-notes/${releaseNote.version}`,
+            date: formatRssDate(releaseNote.date),
+            description: releaseNote.extra,
+            content: formatReleaseNote(releaseNote),
+        });
+    }
+
+    return new Response(feed.rss2(), {
+        headers: {
+            'Content-Type': 'application/xml; charset=utf-8',
+        },
+    });
+}
+
+/**
+ * Formats a date string in the format day/month/year. 
+ * 
+ * Note: If release notes change to ISO format, this will need to be updated.
+ * @param dateStr The date string to format.
+ * @returns The passed in date string as a Date object.
+ */
+function formatRssDate(dateStr: string) {
+    const splitDate = dateStr.split("/");
+    if (splitDate.length !== 3) {
+        throw new Error("Invalid date format");
+    }
+
+    const day = Number(splitDate[0]);
+    const month = Number(splitDate[1]) - 1;
+    const year = Number(splitDate[2]);
+    return new Date(year, month, day);
+}
+
+/**
+ * Formats the release note entry for use as the content of the RSS feed.
+ * @param releaseNote The release note to format.
+ * @returns The formatted release note as a HTML string.
+ */
+function formatReleaseNote(releaseNote: ReleaseNote) {
+    let content = "<p>If you encounter any issues, please report them on <a href=\"https://github.com/zen-browser/desktop/issues/\">the issues page</a>. Thanks everyone for your feedback! ❤️</p>";
+
+    if (releaseNote.extra) {
+        content += `<p>${releaseNote.extra.replace(/(\n)/g, "<br />")}</p>`
+    }
+
+    if (releaseNote.breakingChanges) {
+        content += `<h2>⚠️ Breaking changes</h2>`
+        content += `<ul>`
+        for (const breakingChange of releaseNote.breakingChanges) {
+            content += `<li>${breakingChange}</li>`
+        }
+        content += `</ul>`
+    }
+
+    if (releaseNote.features) {
+        content += `<h2>⭐ Features</h2>`
+        content += `<ul>`
+        for (const feature of releaseNote.features) {
+            content += `<li>${feature}</li>`
+        }
+        content += `</ul>`
+    }
+
+    if (releaseNote.fixes) {
+        content += `<h2>✓ Fixes</h2>`
+        content += `<ul>`
+        for (const fix of releaseNote.fixes) {
+            content += `<li>${fix.description}</li>`
+        }
+        content += `</ul>`
+    }
+
+    return content;
+}