feat: create UserStore class

src/storages/UserStore.ts

@@ -0,0 +1,38 @@
+import { NostrEvent, NostrFilter, NStore } from '@nostrify/nostrify';
+import { DittoEvent } from '@/interfaces/DittoEvent.ts';
+import { getTagSet } from '@/tags.ts';
+
+export class UserStore implements NStore {
+  store: NStore;
+  pubkey: string;
+  #muteList: Promise<DittoEvent>;
+
+  constructor(pubkey: string, store: NStore) {
+    this.pubkey = pubkey;
+    this.store = store;
+    this.#muteList = this.#getMuteList();
+  }
+
+  async event(event: NostrEvent, opts?: { signal?: AbortSignal }): Promise<void> {
+    return await this.store.event(event, opts);
+  }
+
+  /** Query events that `pubkey` did not block */
+  async query(filters: NostrFilter[], opts: { signal?: AbortSignal; limit?: number } = {}): Promise<DittoEvent[]> {
+    const allEvents = await this.store.query(filters, opts);
+
+    const blockedUsers = getTagSet((await this.#muteList).tags, 'p');
+
+    return allEvents.filter((event) => {
+      blockedUsers.has(event.pubkey) === false;
+    });
+  }
+
+  async #getMuteList(): Promise<DittoEvent> {
+    const [muteList] = await this.query([{ authors: [this.pubkey], kinds: [10000], limit: 1 }], {
+      signal: AbortSignal.timeout(5000),
+      limit: 1,
+    });
+    return muteList;
+  }
+}