Use $_SERVER for language

Date: Fri, 29 Nov 2023 17:50:00 +0530

Subject: [PATCH] Check session to select language

As we are unable to change the ACCEPT_LANGUAGE header for a public page, findLanguage always returns 'en'. To use this, do \OC::$server->getSession()->set('selected_language', $lang);

$_SERVER in IRequest is immutable but we want to switch the header to deliver translation files correctly

--- lib/private/L10N/Factory.php	2023-11-29 17:46:48.253716340 +0530

+++ lib/private/L10N/Factory-new.php	2023-11-29 17:47:26.194920628 +0530

@@ -213,6 +213,11 @@

 			}

 		}

@@ -478,7 +478,8 @@

 	 * @throws LanguageNotFoundException

 	 */

 	private function getLanguageFromRequest(?string $app = null): string {

-		$header = $this->request->getHeader('ACCEPT_LANGUAGE');

+		// $header = $this->request->getHeader('ACCEPT_LANGUAGE');

+		$header = $_SERVER['HTTP_ACCEPT_LANGUAGE'];

 		if ($header !== '') {

 			$available = $this->findAvailableLanguages($app);

+		$selectedLang = \OC::$server->getSession()->get('selected_language');

+		if (!empty($selectedLang) && $this->languageExists($appId, $selectedLang)) {