Refactor Forms::duplicate() to use Doctrine instead of Paris

[MAILPOET-3038]

lib/Form/FormSaveController.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace MailPoet\Form;
+
+use MailPoet\Entities\FormEntity;
+use MailPoet\WP\Functions as WPFunctions;
+use MailPoetVendor\Carbon\Carbon;
+use MailPoetVendor\Doctrine\ORM\EntityManager;
+
+class FormSaveController {
+  /** @var EntityManager */
+  private $entityManager;
+
+  /** @var WPFunctions */
+  private $wp;
+
+  public function __construct(
+    EntityManager $entityManager,
+    WPFunctions $wp
+  ) {
+    $this->entityManager = $entityManager;
+    $this->wp = $wp;
+  }
+
+  public function duplicate(FormEntity $formEntity): FormEntity {
+    $duplicate = clone $formEntity;
+    $duplicate->setName(sprintf(__('Copy of %s', 'mailpoet'), $formEntity->getName()));
+
+    // reset timestamps
+    $now = Carbon::createFromTimestamp($this->wp->currentTime('timestamp'));
+    $duplicate->setCreatedAt($now);
+    $duplicate->setUpdatedAt($now);
+    $duplicate->setDeletedAt(null);
+
+    $this->entityManager->persist($duplicate);
+    $this->entityManager->flush();
+
+    return $duplicate;
+  }
+}