Generating Sparkle Feed using Deno

server.ts

import { serve } from "https://deno.land/std@0.168.0/http/server.ts";
import { createClient } from "https://esm.sh/@supabase/supabase-js@2.2.3";
import js2xmlparser from "https://esm.sh/js2xmlparser@5.0.0";

serve(async () => {
  const supabaseURL = Deno.env.get("SUPABASE_URL");
  const supabaseAnon = Deno.env.get("SUPABASE_ANON_KEY");

  const supabase = createClient(supabaseURL!, supabaseAnon!);

  const { data } = await supabase.from("apps").select();

  const applications = [];

  for (const app of data!) {
    if (app["macos_url"] !== null) {
      applications.push({
        title: "Version" + " " + app["version"],
        pubDate: app["created_at"],
        enclosure: {
          "@": {
            "sparkle:os": "macos",
            "sparkle:version": app["version"] as string,
            type: "application/octet-stream",
            url: app["macos_url"] as string,
            "sparkle:edSignature": app["macos_signature"] as string,
          },
        },
      });
    }
    if (app["windows_url"] !== null) {
      applications.push({
        title: "Version" + " " + app["version"],
        pubDate: app["created_at"],
        enclosure: {
          "@": {
            "sparkle:os": "windows",
            "sparkle:version": app["version"] as string,
            type: "application/octet-stream",
            url: app["windows_url"] as string,
            "sparkle:dsaSignature": app["windows_signature"] as string,
          },
        },
      });
    }
  }

  const feed = {
    "@": {
      version: "2.0",
      "xmlns:sparkle": "http://www.andymatuschak.org/xml-namespaces/sparkle",
    },
    "#": {
      channel: {
        title: "Appname RSS",
        description: "Auto Updates for Appname App",
        language: "en",
        item: applications,
      },
    },
  };

  const rssFEED = js2xmlparser.parse("rss", feed, {
    declaration: { encoding: "UTF-8" },
  });

  return new Response(rssFEED, {
    headers: { "Content-Type": "application/xml" },
  });
});