2 files changed, 63 insertions, 20 deletions

diff --git a/lib/private/L10N/Factory.php b/lib/private/L10N/Factory.php
index 74f759a4e0d..91233a0c4a7 100644
--- a/lib/private/L10N/Factory.php
+++ b/lib/private/L10N/Factory.php
@@ -1,6 +1,7 @@
 <?php
 /**
  * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @copyright 2016 Roeland Jago Douma <roeland@famdouma.nl>
  *
  * @author Bart Visscher <bartv@thisnet.nl>
  * @author Joas Schilling <coding@schilljs.com>
@@ -8,6 +9,7 @@
  * @author Morris Jobke <hey@morrisjobke.de>
  * @author Robin Appelman <robin@icewind.nl>
  * @author Robin McCorkell <robin@mccorkell.me.uk>
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
  *
  * @license AGPL-3.0
  *
@@ -147,18 +149,23 @@ class Factory implements IFactory {
 			}
 		}
 
-		$defaultLanguage = $this->config->getSystemValue('default_language', false);
-
-		if ($defaultLanguage !== false && $this->languageExists($app, $defaultLanguage)) {
-			return $defaultLanguage;
-		}
-
-		$lang = $this->setLanguageFromRequest($app);
-		if ($userId !== null && $app === null && !$userLang) {
-			$this->config->setUserValue($userId, 'core', 'lang', $lang);
+		try {
+			// Try to get the language from the Request
+			$lang = $this->getLanguageFromRequest($app);
+			if ($userId !== null && $app === null && !$userLang) {
+				$this->config->setUserValue($userId, 'core', 'lang', $lang);
+			}
+			return $lang;
+		} catch (LanguageNotFoundException $e) {
+			// Finding language from request failed fall back to default language
+			$defaultLanguage = $this->config->getSystemValue('default_language', false);
+			if ($defaultLanguage !== false && $this->languageExists($app, $defaultLanguage)) {
+				return $defaultLanguage;
+			}
 		}
 
-		return $lang;
+		// We could not find any language so fall back to english
+		return 'en';
 	}
 
 	/**
@@ -227,10 +234,11 @@ class Factory implements IFactory {
 	}
 
 	/**
-	 * @param string|null $app App id or null for core
+	 * @param string|null $app
 	 * @return string
+	 * @throws LanguageNotFoundException
 	 */
-	public function setLanguageFromRequest($app = null) {
+	private function getLanguageFromRequest($app) {
 		$header = $this->request->getHeader('ACCEPT_LANGUAGE');
 		if ($header) {
 			$available = $this->findAvailableLanguages($app);
@@ -245,9 +253,6 @@ class Factory implements IFactory {
 
 				foreach ($available as $available_language) {
 					if ($preferred_language === strtolower($available_language)) {
-						if ($app === null && !$this->requestLanguage) {
-							$this->requestLanguage = $available_language;
-						}
 						return $available_language;
 					}
 				}
@@ -255,19 +260,31 @@ class Factory implements IFactory {
 				// Fallback from de_De to de
 				foreach ($available as $available_language) {
 					if (substr($preferred_language, 0, 2) === $available_language) {
-						if ($app === null && !$this->requestLanguage) {
-							$this->requestLanguage = $available_language;
-						}
 						return $available_language;
 					}
 				}
 			}
 		}
 
+		throw new LanguageNotFoundException();
+	}
+
+	/**
+	 * @param string|null $app App id or null for core
+	 * @return string
+	 */
+	public function setLanguageFromRequest($app = null) {
+
+		try {
+			$requestLanguage = $this->getLanguageFromRequest($app);
+		} catch (LanguageNotFoundException $e) {
+			$requestLanguage = 'en';
+		}
+
 		if ($app === null && !$this->requestLanguage) {
-			$this->requestLanguage = 'en';
+			$this->requestLanguage = $requestLanguage;
 		}
-		return 'en'; // Last try: English
+		return $requestLanguage;
 	}
 
 	/**
diff --git a/lib/private/L10N/LanguageNotFoundException.php b/lib/private/L10N/LanguageNotFoundException.php
new file mode 100644
index 00000000000..175f6ab3483
--- /dev/null
+++ b/lib/private/L10N/LanguageNotFoundException.php
@@ -0,0 +1,26 @@
+<?php
+/**
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OC\L10N;
+
+class LanguageNotFoundException extends \Exception {
+
+}