private function importNewsletterDemoData()
 {
     $this->modelManager = Shopware()->Container()->get('models');
     $newsletterGroup = $this->modelManager->find(Group::class, 1);
     for ($addressAmount = 0; $addressAmount < 25; $addressAmount++) {
         $address = new Address();
         $address->setEmail('test_' . $addressAmount . '@example.com');
         $address->setAdded(new \DateTime());
         $address->setNewsletterGroup($newsletterGroup);
         $address->setIsCustomer(false);
         $this->modelManager->persist($address);
     }
     $this->modelManager->flush();
 }
 /**
  * @param array $records
  * @throws \Enlight_Event_Exception
  * @throws \Exception
  */
 public function write($records)
 {
     if (empty($records['default'])) {
         $message = SnippetsHelper::getNamespace()->get('adapters/newsletter/no_records', 'No newsletter records were found.');
         throw new \Exception($message);
     }
     $records = Shopware()->Events()->filter('Shopware_Components_SwagImportExport_DbAdapters_CategoriesDbAdapter_Write', $records, ['subject' => $this]);
     $defaultValues = $this->getDefaultValues();
     /** @var EntityRepository $addressRepository */
     $addressRepository = $this->manager->getRepository(Address::class);
     /** @var EntityRepository $groupRepository */
     $groupRepository = $this->manager->getRepository(Group::class);
     /** @var EntityRepository $contactDataRepository */
     $contactDataRepository = $this->manager->getRepository(ContactData::class);
     $count = 0;
     foreach ($records['default'] as $newsletterData) {
         try {
             $count++;
             $newsletterData = $this->validator->filterEmptyString($newsletterData);
             $this->validator->checkRequiredFields($newsletterData);
             $recipient = $addressRepository->findOneBy(['email' => $newsletterData['email']]);
             if ($recipient instanceof Address && empty($newsletterData['groupName'])) {
                 continue;
             }
             if (!$recipient instanceof Address) {
                 $newsletterData = $this->dataManager->setDefaultFieldsForCreate($newsletterData, $defaultValues);
                 $recipient = new Address();
             }
             $this->validator->validate($newsletterData, NewsletterDataType::$mapper);
             if ($newsletterData['groupName']) {
                 /** @var Group $group */
                 $group = $groupRepository->findOneBy(['name' => $newsletterData['groupName']]);
                 if (!$group instanceof Group) {
                     $group = new Group();
                     $group->setName($newsletterData['groupName']);
                     $this->manager->persist($group);
                     $this->manager->flush($group);
                 }
                 $newsletterData['groupId'] = $group->getId();
             }
             // save newsletter address
             $newsletterAddress = $this->prepareNewsletterAddress($newsletterData);
             $recipient->fromArray($newsletterAddress);
             $this->manager->persist($recipient);
             if ($recipient->getGroupId() !== 0) {
                 // save mail data
                 $contactData = $contactDataRepository->findOneBy(['email' => $newsletterData['email']]);
                 if (!$contactData instanceof ContactData) {
                     $contactData = new ContactData();
                     $contactData->setAdded(new \DateTime());
                     $this->manager->persist($contactData);
                 }
                 $contactData->fromArray($newsletterData);
             }
             if ($count % 20 === 0) {
                 $this->manager->flush();
             }
         } catch (AdapterException $e) {
             $message = $e->getMessage();
             $this->saveMessage($message);
         }
     }
     $this->manager->flush();
 }