From f745d71278d3e89a44cb7b50108cc2f182696b6d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=A0t=C4=9Bp=C3=A1n=20Gran=C3=A1t?=
 <granat.stepan@gmail.com>
Date: Wed, 6 Nov 2024 13:33:25 +0100
Subject: [PATCH 1/2] fix: language detector incorrectly touching window

---
 packages/web/src/package/LanguageDetector.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/web/src/package/LanguageDetector.ts b/packages/web/src/package/LanguageDetector.ts
index a2cf29bad5..cd20d689fb 100644
--- a/packages/web/src/package/LanguageDetector.ts
+++ b/packages/web/src/package/LanguageDetector.ts
@@ -10,7 +10,7 @@ export function detectLanguage(language: string, availableLanguages: string[]) {
   const getTwoLetters = (fullTag: string) =>
     fullTag.replace(/^(.+?)(-.*)?$/, '$1');
 
-  const preferredTwoLetter = getTwoLetters(window.navigator.language);
+  const preferredTwoLetter = getTwoLetters(language);
   const twoLetterMatch = availableLanguages.find(
     (l) => getTwoLetters(l) === preferredTwoLetter
   );

From 1e76a60b11deae200f42c3a9af26b7165e296064 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=A0t=C4=9Bp=C3=A1n=20Gran=C3=A1t?=
 <granat.stepan@gmail.com>
Date: Wed, 6 Nov 2024 13:37:16 +0100
Subject: [PATCH 2/2] chore: add tests

---
 .../web/src/package/LanguageDetector.test.ts     | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/packages/web/src/package/LanguageDetector.test.ts b/packages/web/src/package/LanguageDetector.test.ts
index efe0d8989b..45bbc783ac 100644
--- a/packages/web/src/package/LanguageDetector.test.ts
+++ b/packages/web/src/package/LanguageDetector.test.ts
@@ -1,12 +1,12 @@
-import { createLanguageDetector } from './LanguageDetector';
+import { createLanguageDetector, detectLanguage } from './LanguageDetector';
 
-describe('language detector', () => {
+describe('language detector plugin', () => {
   beforeEach(() => {
     const languageGetter = jest.spyOn(window.navigator, 'language', 'get');
     languageGetter.mockReturnValue('cs-CZ');
   });
 
-  it('detects language', () => {
+  it('detects language from window.navigator', () => {
     const detector = createLanguageDetector();
 
     const result = detector.getLanguage({
@@ -17,3 +17,13 @@ describe('language detector', () => {
     expect(result).toEqual('cs');
   });
 });
+
+describe('detect language from parameters', () => {
+  it('detects language exact', () => {
+    expect(detectLanguage('cs', ['en', 'cs'])).toEqual('cs');
+  });
+
+  it('detects language prefix', () => {
+    expect(detectLanguage('cs-CZ', ['en', 'cs'])).toEqual('cs');
+  });
+});