Add flag to only persist customer session if data has changed

Author: supercid

Components/Customer.php

@@ -86,15 +86,20 @@ public static function persistSession()
                 ->Models()
                 ->getRepository('\Shopware\CustomModels\Nosto\Customer\Customer')
                 ->findOneBy(array('sessionId' => $sessionId));
+            $shouldPersist = false;
             if (empty($customer)) {
                 $customer = new Customer();
                 $customer->setSessionId($sessionId);
+                $shouldPersist = true;
             }
             if ($nostoId !== $customer->getNostoId()) {
                 $customer->setNostoId($nostoId);
+                $shouldPersist = true;
+            }
+            if ($shouldPersist) {
+                Shopware()->Models()->persist($customer);
+                Shopware()->Models()->flush($customer);
             }
-            Shopware()->Models()->persist($customer);
-            Shopware()->Models()->flush($customer);
         }
     }