Show Session Switchover Events

Co-authored-by: Fedor Indutny <79877362+indutny-signal@users.noreply.github.com>
Co-authored-by: Scott Nonnenberg <scott@signal.org>

ts/util/getStringForPhoneNumberDiscovery.ts

@@ -0,0 +1,29 @@
+// Copyright 2023 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { LocalizerType } from '../types/Util';
+
+export function getStringForPhoneNumberDiscovery({
+  phoneNumber,
+  i18n,
+  conversationTitle,
+  sharedGroup,
+}: {
+  phoneNumber: string;
+  i18n: LocalizerType;
+  conversationTitle: string;
+  sharedGroup?: string;
+}): string {
+  if (sharedGroup) {
+    return i18n('icu:PhoneNumberDiscovery--notification--withSharedGroup', {
+      phoneNumber,
+      conversationTitle,
+      sharedGroup,
+    });
+  }
+
+  return i18n('icu:PhoneNumberDiscovery--notification--noSharedGroup', {
+    phoneNumber,
+    conversationTitle,
+  });
+}