feat: add update indicator

packages/api/src/root.ts

@@ -13,6 +13,7 @@ import { logRouter } from "./router/log";
 import { mediaRouter } from "./router/medias/media-router";
 import { searchEngineRouter } from "./router/search-engine/search-engine-router";
 import { serverSettingsRouter } from "./router/serverSettings";
+import { updateCheckerRouter } from "./router/update-checker";
 import { userRouter } from "./router/user";
 import { widgetRouter } from "./router/widgets";
 import { createTRPCRouter } from "./trpc";
@@ -35,6 +36,7 @@ export const appRouter = createTRPCRouter({
   cronJobs: cronJobsRouter,
   apiKeys: apiKeysRouter,
   media: mediaRouter,
+  updateChecker: updateCheckerRouter,
 });
 
 // export type definition of API

packages/api/src/router/update-checker.ts

@@ -0,0 +1,17 @@
+import { createSubPubChannel } from "@homarr/redis";
+
+import { createTRPCRouter, protectedProcedure } from "../trpc";
+
+export const updateCheckerRouter = createTRPCRouter({
+  getAvailableUpdates: protectedProcedure.query(async () => {
+    const channel = createSubPubChannel<{
+      availableUpdates: { name: string | null; contentHtml?: string; url: string; tag_name: string }[];
+    }>("homarr:update", {
+      persist: true,
+    });
+
+    const data = await channel.getLastDataAsync();
+
+    return data?.availableUpdates;
+  }),
+});