Don't ring large groups

ts/conversations/isConversationTooBigToRing.ts

@@ -0,0 +1,14 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { parseIntWithFallback } from '../util/parseIntWithFallback';
+import { getValue } from '../RemoteConfig';
+import type { ConversationType } from '../state/ducks/conversations';
+
+const getMaxGroupCallRingSize = (): number =>
+  parseIntWithFallback(getValue('global.calling.maxGroupCallRingSize'), 16);
+
+export const isConversationTooBigToRing = (
+  conversation: Readonly<Pick<ConversationType, 'memberships'>>
+): boolean =>
+  (conversation.memberships?.length || 0) >= getMaxGroupCallRingSize();