Convert libphonenumber utilities to TypeScript, removing unused ones

ts/util/libphonenumberUtil.ts

@@ -0,0 +1,51 @@
+// Copyright 2014-2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import {
+  instance as libphonenumber,
+  PhoneNumberFormat,
+} from './libphonenumberInstance';
+
+const FALLBACK_REGION_CODE = 'ZZ';
+
+export function getRegionCodeForNumber(number: string): string {
+  try {
+    const parsedNumber = libphonenumber.parse(number);
+    return (
+      libphonenumber.getRegionCodeForNumber(parsedNumber) ||
+      FALLBACK_REGION_CODE
+    );
+  } catch (e) {
+    return FALLBACK_REGION_CODE;
+  }
+}
+
+export function parseNumber(
+  number: string,
+  defaultRegionCode?: string
+):
+  | { isValidNumber: false; error: unknown }
+  | {
+      isValidNumber: true;
+      regionCode: undefined | string;
+      countryCode: undefined | string;
+      e164: string;
+    } {
+  try {
+    const parsedNumber = libphonenumber.parse(number, defaultRegionCode);
+
+    const isValidNumber = libphonenumber.isValidNumber(parsedNumber);
+    if (!isValidNumber) {
+      return { error: new Error('Invalid phone number'), isValidNumber: false };
+    }
+
+    return {
+      isValidNumber: true,
+      regionCode: libphonenumber.getRegionCodeForNumber(parsedNumber),
+      countryCode: parsedNumber.getCountryCode()?.toString(),
+      e164: libphonenumber.format(parsedNumber, PhoneNumberFormat.E164),
+    };
+  } catch (error) {
+    return { error, isValidNumber: false };
+  }
+}