Load group info in simple mode

src/lib/group.svelte.ts

@@ -0,0 +1,40 @@
+import { SimplePool } from "@nostr/tools";
+import { RELAY_URL, GROUP_ID } from "$lib/config";
+
+export type GroupMetadata = {
+  name: string;
+  picture?: string;
+  about?: string;
+  isPrivate: boolean;
+  isClosed: boolean;
+};
+
+let group = $state<GroupMetadata | null>(null);
+
+export const groupStore = {
+  get data() {
+    return group;
+  },
+};
+
+export async function loadGroup() {
+  const pool = new SimplePool();
+  try {
+    const events = await pool.querySync([RELAY_URL], {
+      kinds: [39000],
+      "#d": [GROUP_ID],
+      limit: 1,
+    });
+    const event = events[0];
+    if (!event) return;
+    group = {
+      name: event.tags.find((t) => t[0] === "name")?.[1] ?? GROUP_ID,
+      picture: event.tags.find((t) => t[0] === "picture")?.[1],
+      about: event.tags.find((t) => t[0] === "about")?.[1],
+      isPrivate: event.tags.some((t) => t[0] === "private"),
+      isClosed: event.tags.some((t) => t[0] === "closed"),
+    };
+  } finally {
+    pool.close([RELAY_URL]);
+  }
+}