new notifications design

packages/app/src/Cache/RefreshFeedCache.ts

@@ -0,0 +1,25 @@
+import { FeedCache } from "@snort/shared";
+import { RequestBuilder, TaggedRawEvent } from "@snort/system";
+import { LoginSession } from "Login";
+
+export type TWithCreated<T> = T & { created_at: number };
+
+export abstract class RefreshFeedCache<T> extends FeedCache<TWithCreated<T>> {
+  abstract buildSub(session: LoginSession, rb: RequestBuilder): void;
+  abstract onEvent(evs: Readonly<Array<TaggedRawEvent>>): void;
+
+  /**
+   * Get latest event
+   */
+  protected newest() {
+    let ret = 0;
+    this.cache.forEach(v => (ret = v.created_at > ret ? v.created_at : ret));
+    return ret;
+  }
+
+  override async preload(): Promise<void> {
+    await super.preload();
+    // load all dms to memory
+    await this.buffer([...this.onTable]);
+  }
+}