Make Home feed kind of work

src/client.ts

@@ -2,30 +2,30 @@ import { Author, RelayPool } from '@/deps.ts';
 
 import { poolRelays } from './config.ts';
 
-import type { Event } from './event.ts';
+import type { Event, SignedEvent } from './event.ts';
 
 const pool = new RelayPool(poolRelays);
 
 /** Fetch a Nostr event by its ID. */
-const fetchEvent = async (id: string): Promise<Event | null> => {
-  const event = await (pool.getEventById(id, poolRelays, 0) as Promise<Event>);
+const fetchEvent = async (id: string): Promise<SignedEvent | null> => {
+  const event = await (pool.getEventById(id, poolRelays, 0) as Promise<SignedEvent>);
   return event?.id === id ? event : null;
 };
 
 /** Fetch a Nostr `set_medatadata` event for a user's pubkey. */
-const fetchUser = async (pubkey: string): Promise<Event<0> | null> => {
+const fetchUser = async (pubkey: string): Promise<SignedEvent<0> | null> => {
   const author = new Author(pool, poolRelays, pubkey);
-  const event: Event<0> | null = await new Promise((resolve) => author.metaData(resolve, 0));
+  const event: SignedEvent<0> | null = await new Promise((resolve) => author.metaData(resolve, 0));
   return event?.pubkey === pubkey ? event : null;
 };
 
 /** Fetch users the given pubkey follows. */
-const fetchFollows = (pubkey: string): Promise<Event<3> | null> => {
+const fetchFollows = (pubkey: string): Promise<SignedEvent<3> | null> => {
   return new Promise((resolve) => {
     pool.subscribe(
       [{ authors: [pubkey], kinds: [3] }],
       poolRelays,
-      (event: Event<3> | null) => {
+      (event: SignedEvent<3> | null) => {
         resolve(event?.pubkey === pubkey ? event : null);
       },
       undefined,
@@ -34,4 +34,25 @@ const fetchFollows = (pubkey: string): Promise<Event<3> | null> => {
   });
 };
 
-export { fetchEvent, fetchFollows, fetchUser, pool };
+/** Fetch 20 events from people the user follows. */
+function fetchFeed(event3: Event<3>): Promise<SignedEvent<1>[]> {
+  const authors = event3.tags.filter((tag) => tag[0] === 'p').map((tag) => tag[1]);
+  const results: SignedEvent<1>[] = [];
+
+  return new Promise((resolve) => {
+    pool.subscribe(
+      [{ authors, kinds: [1], limit: 20 }],
+      poolRelays,
+      (event: SignedEvent<1> | null) => {
+        if (event) {
+          results.push(event);
+        }
+      },
+      void 0,
+      () => resolve(results),
+      { unsubscribeOnEose: true },
+    );
+  });
+}
+
+export { fetchEvent, fetchFeed, fetchFollows, fetchUser, pool };