Added a 'clone part' function.

src/Controller/PartController.php

@@ -121,7 +121,38 @@ class PartController extends AbstractController
         }
 
 
-        return $this->render('new_part.html.twig',
+        return $this->render('Parts/new_part.html.twig',
+            [
+                "part" => $new_part,
+                "form" => $form->createView()
+            ]);
+    }
+
+    /**
+     * @Route("/part/{id}/clone", name="part_clone")
+     *
+     */
+    public function clone(Part $part, Request $request, EntityManagerInterface $em, TranslatorInterface $translator)
+    {
+
+        /** @var Part $new_part */
+        $new_part = clone($part);
+
+        $this->denyAccessUnlessGranted('create', $new_part);
+
+        $form = $this->createForm(PartType::class, $new_part);
+
+        $form->handleRequest($request);
+
+        if ($form->isSubmitted() && $form->isValid()) {
+            $em->persist($new_part);
+            $em->flush();
+            $this->addFlash('success', $translator->trans('part.created_flash'));
+            return $this->redirectToRoute('part_edit',['id' => $new_part->getID()]);
+        }
+
+
+        return $this->render('Parts/new_part.html.twig',
             [
                 "part" => $new_part,
                 "form" => $form->createView()

src/Entity/DBElement.php

@@ -56,6 +56,7 @@ abstract class DBElement
         return (int) $this->id;
     }
 
+
     /**
      * Returns the ID as an string, defined by the element class.
      * This should have a form like P000014, for a part with ID 14.
@@ -63,4 +64,10 @@ abstract class DBElement
      */
     abstract public function getIDString() : string;
 
+    public function __clone()
+    {
+        //Set ID to null, so that an new entry is created
+        $this->id = null;
+    }
+
 }

src/Services/EntityURLGenerator.php

@@ -90,6 +90,16 @@ class EntityURLGenerator
         throw new EntityNotSupported('The given entity is not supported yet!');
     }
 
+    public function cloneURL($entity) : string
+    {
+        if($entity instanceof Part)
+        {
+            return $this->urlGenerator->generate('part_clone', ['id' => $entity->getID()]);
+        }
+
+        throw new EntityNotSupported('The given entity is not supported yet!');
+    }
+
     /**
      * Generates an HTML link to the info page about the given entity.
      * @param $entity mixed The entity for which the info link should be generated.

src/Twig/AppExtension.php

@@ -68,6 +68,8 @@ class AppExtension extends AbstractExtension
                 return $this->entityURLGenerator->editURL($entity);
             case 'create':
                 return $this->entityURLGenerator->createURL($entity);
+            case 'clone':
+                return $this->entityURLGenerator->cloneURL($entity);
         }
 
         throw new \InvalidArgumentException('method is not supported!');