feat: add rss widget (#760)

Co-authored-by: SeDemal <demal.sebastien@bluewin.ch>

packages/redis/src/index.ts

@@ -1,6 +1,6 @@
 import { createListChannel, createQueueChannel, createSubPubChannel } from "./lib/channel";
 
-export { createCacheChannel, createItemAndIntegrationChannel } from "./lib/channel";
+export { createCacheChannel, createItemAndIntegrationChannel, createItemChannel } from "./lib/channel";
 
 export const exampleChannel = createSubPubChannel<{ message: string }>("example");
 export const pingChannel = createSubPubChannel<{ url: string; statusCode: number } | { url: string; error: string }>(

packages/redis/src/lib/channel.ts

@@ -163,6 +163,14 @@ export const createCacheChannel = <TData>(name: string, cacheDurationMs: number
 
 export const createItemAndIntegrationChannel = <TData>(kind: WidgetKind, integrationId: string) => {
   const channelName = `item:${kind}:integration:${integrationId}`;
+  return createChannelWithLatestAndEvents<TData>(channelName);
+};
+
+export const createItemChannel = <TData>(itemId: string) => {
+  return createChannelWithLatestAndEvents<TData>(`item:${itemId}`);
+};
+
+const createChannelWithLatestAndEvents = <TData>(channelName: string) => {
   return {
     subscribe: (callback: (data: TData) => void) => {
       return ChannelSubscriptionTracker.subscribe(channelName, (message) => {