Move join before composing, and cache membership state

src/lib/group.svelte.ts

@@ -1,5 +1,6 @@
-import { GROUP_ID } from "$lib/config";
+import { GROUP_ID, MODE } from "$lib/config";
 import { queryForum } from "$lib/relay";
+import { groupsStore } from "$lib/groups.svelte";
 
 export type GroupMetadata = {
   name: string;
@@ -7,9 +8,20 @@ export type GroupMetadata = {
   about?: string;
   isPrivate: boolean;
   isClosed: boolean;
+  isRestricted: boolean;
+  isHidden: boolean;
   admins: string[];
 };
 
+// NIP-29 access flags: private = members-only read, restricted = members-only
+// write, closed = join requests ignored, hidden = metadata hidden from non-members.
+export type GroupFlags = {
+  isPrivate: boolean;
+  isClosed: boolean;
+  isRestricted: boolean;
+  isHidden: boolean;
+};
+
 let group = $state<GroupMetadata | null>(null);
 let loaded = $state(false);
 
@@ -40,9 +52,33 @@ export async function loadGroup() {
       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"),
+      isRestricted: event.tags.some((t) => t[0] === "restricted"),
+      isHidden: event.tags.some((t) => t[0] === "hidden"),
       admins,
     };
   } finally {
     loaded = true;
   }
 }
+
+// A group's access flags from whichever store holds them: full mode keeps every
+// room in the groups list, simple mode has the single active group's metadata.
+export function getGroupFlags(groupId: string): GroupFlags | null {
+  if (MODE === "full") {
+    const g = groupsStore.list.find((x) => x.id === groupId);
+    if (!g) return null;
+    return {
+      isPrivate: g.flags.includes("private"),
+      isClosed: g.flags.includes("closed"),
+      isRestricted: g.flags.includes("restricted"),
+      isHidden: g.flags.includes("hidden"),
+    };
+  }
+  if (!group) return null;
+  return {
+    isPrivate: group.isPrivate,
+    isClosed: group.isClosed,
+    isRestricted: group.isRestricted,
+    isHidden: group.isHidden,
+  };
+}