From 529bb08bf9f39a963442a4e701e5c32d2c4c9efd Mon Sep 17 00:00:00 2001
From: Arman Ozak <arman@armanozak.com>
Date: Thu, 28 May 2020 20:52:33 +0300
Subject: [PATCH] feat: add getLocaleDirection to localization utils

---
 .../src/lib/tests/localization-utils.spec.ts  | 44 +++++++++++++++++++
 .../core/src/lib/utils/localization-utils.ts  |  9 ++++
 2 files changed, 53 insertions(+)

diff --git a/npm/ng-packs/packages/core/src/lib/tests/localization-utils.spec.ts b/npm/ng-packs/packages/core/src/lib/tests/localization-utils.spec.ts
index f5319edc2d..1409c0da21 100644
--- a/npm/ng-packs/packages/core/src/lib/tests/localization-utils.spec.ts
+++ b/npm/ng-packs/packages/core/src/lib/tests/localization-utils.spec.ts
@@ -2,9 +2,53 @@ import {
   createLocalizationPipeKeyGenerator,
   createLocalizer,
   createLocalizerWithFallback,
+  getLocaleDirection,
 } from '../utils/localization-utils';
 
 describe('Localization Utils', () => {
+  describe('#getLocaleDirection', () => {
+    test.each`
+      locale       | expected
+      ${undefined} | ${'ltr'}
+      ${null}      | ${'ltr'}
+      ${''}        | ${'ltr'}
+      ${'en'}      | ${'ltr'}
+      ${'en-US'}   | ${'ltr'}
+      ${'pt'}      | ${'ltr'}
+      ${'pt-PT'}   | ${'ltr'}
+      ${'ar'}      | ${'rtl'}
+      ${'ar-AE'}   | ${'rtl'}
+      ${'ar-QA'}   | ${'rtl'}
+      ${'ckb'}     | ${'rtl'}
+      ${'ckb-IR'}  | ${'rtl'}
+      ${'fa'}      | ${'rtl'}
+      ${'fa-AF'}   | ${'rtl'}
+      ${'he'}      | ${'rtl'}
+      ${'ks'}      | ${'rtl'}
+      ${'ksb'}     | ${'ltr'}
+      ${'ksf'}     | ${'ltr'}
+      ${'ksh'}     | ${'ltr'}
+      ${'lrc'}     | ${'rtl'}
+      ${'lrc-IQ'}  | ${'rtl'}
+      ${'mzn'}     | ${'rtl'}
+      ${'pa'}      | ${'ltr'}
+      ${'pa-Arab'} | ${'rtl'}
+      ${'ps'}      | ${'rtl'}
+      ${'ps-PK'}   | ${'rtl'}
+      ${'sd'}      | ${'rtl'}
+      ${'ug'}      | ${'rtl'}
+      ${'ur'}      | ${'rtl'}
+      ${'ur-IN'}   | ${'rtl'}
+      ${'uz'}      | ${'ltr'}
+      ${'uz-Arab'} | ${'rtl'}
+      ${'yi'}      | ${'rtl'}
+      ${'zh'}      | ${'ltr'}
+      ${'zh-Hans'} | ${'ltr'}
+    `('should return $expected when $locale is given as parameter', ({ locale, expected }) => {
+      expect(getLocaleDirection(locale)).toBe(expected);
+    });
+  });
+
   describe('#createLocalizer', () => {
     const localize = createLocalizer({
       values: { foo: { bar: 'baz' }, x: { y: 'z' } },
diff --git a/npm/ng-packs/packages/core/src/lib/utils/localization-utils.ts b/npm/ng-packs/packages/core/src/lib/utils/localization-utils.ts
index ed094f7fc7..09478c8ed8 100644
--- a/npm/ng-packs/packages/core/src/lib/utils/localization-utils.ts
+++ b/npm/ng-packs/packages/core/src/lib/utils/localization-utils.ts
@@ -1,5 +1,14 @@
 import { ApplicationConfiguration } from '../models/application-configuration';
 
+// This will not be necessary when only Angukar 9.1+ is supported
+export function getLocaleDirection(locale: string): 'ltr' | 'rtl' {
+  return /^(ar(-[A-Z]{2})?|ckb(-IR)?|fa(-AF)?|he|ks|lrc(-IQ)?|mzn|pa-Arab|ps(-PK)?|sd|ug|ur(-IN)?|uz-Arab|yi)$/.test(
+    locale,
+  )
+    ? 'rtl'
+    : 'ltr';
+}
+
 export function createLocalizer(localization: ApplicationConfiguration.Localization) {
   return (resourceName: string, key: string, defaultValue: string) => {
     if (resourceName === '_') return key;