Cache all the things

packages/system/src/cache/events.ts

@@ -0,0 +1,23 @@
+import { NostrEvent } from "nostr";
+import { db } from ".";
+import { FeedCache } from "@snort/shared";
+
+export class EventsCache extends FeedCache<NostrEvent> {
+  constructor() {
+    super("EventsCache", db.events);
+  }
+
+  key(of: NostrEvent): string {
+    return of.id;
+  }
+
+  override async preload(): Promise<void> {
+    await super.preload();
+    // load everything
+    await this.buffer([...this.onTable]);
+  }
+
+  takeSnapshot(): Array<NostrEvent> {
+    return [...this.cache.values()];
+  }
+}