Phased rollout by country code; starting w/ desktop.stories remote flag

ts/util/stories.ts

@@ -0,0 +1,35 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { isBucketValueEnabled, isEnabled } from '../RemoteConfig';
+import { UUIDKind } from '../types/UUID';
+import { isBeta } from './version';
+
+// Note: selectors/items is the other place this check is done
+export const getStoriesAvailable = (): boolean => {
+  if (
+    isBucketValueEnabled(
+      'desktop.stories',
+      window.textsecure.storage.user.getNumber(),
+      window.textsecure.storage.user.getUuid(UUIDKind.ACI)?.toString()
+    )
+  ) {
+    return true;
+  }
+
+  if (isEnabled('desktop.internalUser')) {
+    return true;
+  }
+
+  if (isEnabled('desktop.stories.beta') && isBeta(window.getVersion())) {
+    return true;
+  }
+
+  return false;
+};
+
+export const getStoriesDisabled = (): boolean =>
+  window.Events.getHasStoriesDisabled();
+
+export const getStoriesBlocked = (): boolean =>
+  !getStoriesAvailable() || getStoriesDisabled();