Move plugin files to a subfolder

[MAILPOET-3988]

mailpoet/lib/Subscribers/SubscriberCustomFieldRepository.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace MailPoet\Subscribers;
+
+use MailPoet\Doctrine\Repository;
+use MailPoet\Entities\CustomFieldEntity;
+use MailPoet\Entities\SubscriberCustomFieldEntity;
+use MailPoet\Entities\SubscriberEntity;
+
+/**
+ * @extends Repository<SubscriberCustomFieldEntity>
+ */
+class SubscriberCustomFieldRepository extends Repository {
+  protected function getEntityClassName() {
+    return SubscriberCustomFieldEntity::class;
+  }
+
+  /**
+   * @param string|array|null $value
+   */
+  public function createOrUpdate(SubscriberEntity $subscriber, CustomFieldEntity $customField, $value): SubscriberCustomFieldEntity {
+    $subscriberCustomField = $this->findOneBy(['subscriber' => $subscriber, 'customField' => $customField]);
+    if ($subscriberCustomField instanceof SubscriberCustomFieldEntity) {
+      $subscriberCustomField->setValue($value);
+    } else {
+      $subscriberCustomField = new SubscriberCustomFieldEntity($subscriber, $customField, $value);
+      $this->entityManager->persist($subscriberCustomField);
+    }
+    $this->entityManager->flush();
+    return $subscriberCustomField;
+  }
+}