Group name spoofing warning

ts/util/isConversationNameKnown.ts

@@ -0,0 +1,22 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { ConversationType } from '../state/ducks/conversations';
+import { missingCaseError } from './missingCaseError';
+
+export function isConversationNameKnown(
+  conversation: Readonly<
+    Pick<ConversationType, 'e164' | 'name' | 'profileName' | 'type'>
+  >
+): boolean {
+  switch (conversation.type) {
+    case 'direct':
+      return Boolean(
+        conversation.name || conversation.profileName || conversation.e164
+      );
+    case 'group':
+      return Boolean(conversation.name);
+    default:
+      throw missingCaseError(conversation.type);
+  }
+}