1 files changed, 32 insertions, 0 deletions
diff --git a/lib/private/L10N/Factory.php b/lib/private/L10N/Factory.php
index 8c8735836bb..79495f5ff88 100644
--- a/lib/private/L10N/Factory.php
+++ b/lib/private/L10N/Factory.php
@@ -32,6 +32,7 @@ namespace OC\L10N;
 
 use OCP\IConfig;
 use OCP\IRequest;
+use OCP\IUser;
 use OCP\IUserSession;
 use OCP\L10N\IFactory;
 
@@ -321,6 +322,37 @@ class Factory implements IFactory {
 		return array_search($lang, $languages) !== false;
 	}
 
+	public function iterateLanguage(bool $reset = false): string {
+		static $i = 0;
+		if($reset) {
+			$i = 0;
+		}
+		switch($i) {
+			/** @noinspection PhpMissingBreakStatementInspection */
+			case 0:
+				$i++;
+				$forcedLang = $this->config->getSystemValue('force_language', false);
+				if(is_string($forcedLang)) {
+					return $forcedLang;
+				}
+			/** @noinspection PhpMissingBreakStatementInspection */
+			case 1:
+				$i++;
+				$user = $this->userSession->getUser();
+				if($user instanceof IUser) {
+					$userLang = $this->config->getUserValue($user->getUID(), 'core', 'lang', null);
+					if(is_string($userLang)) {
+						return $userLang;
+					}
+				}
+			case 2:
+				$i++;
+				return $this->config->getSystemValue('default_language', 'en');
+			default:
+				return 'en';
+		}
+	}
+
 	/**
 	 * @param string $locale
 	 * @return bool