Sync group stories through storage service

ts/util/isGroupInStoryMode.ts

@@ -0,0 +1,23 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { ConversationType } from '../state/ducks/conversations';
+import { StorySendMode } from '../types/Stories';
+import { assertDev } from './assert';
+
+export function isGroupInStoryMode(
+  { id, type, storySendMode }: ConversationType,
+  conversationIdsWithStories: Set<string>
+): boolean {
+  if (type !== 'group') {
+    return false;
+  }
+  assertDev(
+    storySendMode !== undefined,
+    'isGroupInStoryMode: groups must have storySendMode field'
+  );
+  if (storySendMode === StorySendMode.IfActive) {
+    return conversationIdsWithStories.has(id);
+  }
+  return storySendMode === StorySendMode.Always;
+}