create toggleDefault method in lang method and modify in Country model

core/lib/Thelia/Model/Lang.php

@@ -3,9 +3,13 @@
 namespace Thelia\Model;
 
 use Propel\Runtime\Connection\ConnectionInterface;
+use Propel\Runtime\Exception\PropelException;
+use Propel\Runtime\Propel;
 use Thelia\Core\Event\Lang\LangEvent;
 use Thelia\Core\Event\TheliaEvents;
 use Thelia\Model\Base\Lang as BaseLang;
+use Thelia\Model\Base\LangQuery;
+use Thelia\Model\Map\LangTableMap;
 
 class Lang extends BaseLang {
 
@@ -25,6 +29,30 @@ class Lang extends BaseLang {
         return $default_lang;
     }
 
+    public function toggleDefault()
+    {
+        if($this->getId() === null) {
+            throw new \RuntimeException("impossible to just uncheck default language, choose a new one");
+        }
+        $con = Propel::getWriteConnection(LangTableMap::DATABASE_NAME);
+        $con->beginTransaction();
+        try {
+            LangQuery::create()
+                ->filterByByDefault(1)
+                ->update(array('ByDefault' => 0), $con);
+
+            $this
+                ->setByDefault(1)
+                ->save($con);
+
+            $con->commit();
+        } catch(PropelException $e) {
+            $con->rollBack();
+            throw $e;
+        }
+
+    }
+
     public function preInsert(ConnectionInterface $con = null)
     {
         $this->dispatchEvent(TheliaEvents::BEFORE_CREATELANG, new LangEvent($this));