Show preview pictures as carousel on part info page.

src/Controller/PartController.php

@@ -34,6 +34,7 @@ use App\Entity\Parts\Category;
 use App\Entity\Parts\Part;
 use App\Form\Part\PartBaseType;
 use App\Services\AttachmentHelper;
+use App\Services\Attachments\PartPreviewGenerator;
 use App\Services\PricedetailHelper;
 use Doctrine\ORM\EntityManagerInterface;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
@@ -55,17 +56,19 @@ class PartController extends AbstractController
      * @param AttachmentHelper $attachmentHelper
      * @return \Symfony\Component\HttpFoundation\Response
      */
-    public function show(Part $part, AttachmentHelper $attachmentHelper, PricedetailHelper $pricedetailHelper)
+    public function show(Part $part, AttachmentHelper $attachmentHelper, PricedetailHelper $pricedetailHelper, PartPreviewGenerator $previewGenerator)
     {
         $this->denyAccessUnlessGranted('read', $part);
 
-        return $this->render('Parts/info/show_part_info.html.twig',
+        return $this->render(
+            'Parts/info/show_part_info.html.twig',
             [
                 'part' => $part,
                 'attachment_helper' => $attachmentHelper,
-                'pricedetail_helper' => $pricedetailHelper
+                'pricedetail_helper' => $pricedetailHelper,
+                'pictures' => $previewGenerator->getPreviewAttachments($part)
             ]
-            );
+        );
     }
 
     /**
@@ -78,7 +81,7 @@ class PartController extends AbstractController
      * @return \Symfony\Component\HttpFoundation\Response
      */
     public function edit(Part $part, Request $request, EntityManagerInterface $em, TranslatorInterface $translator,
-            AttachmentHelper $attachmentHelper)
+                         AttachmentHelper $attachmentHelper)
     {
         $this->denyAccessUnlessGranted('edit', $part);
 

src/DataTables/PartsDataTable.php

@@ -156,7 +156,7 @@ class PartsDataTable implements DataTableTypeInterface
             ->add('picture', TextColumn::class, [
                 'label' => '',
                 'render' => function ($value, Part $context) {
-                    $preview_attachment = $this->previewGenerator->previewAttachment($context);
+                    $preview_attachment = $this->previewGenerator->getTablePreviewAttachment($context);
                     if ($preview_attachment === null) {
                         return '';
                     }

src/Services/Attachments/PartPreviewGenerator.php

@@ -48,13 +48,70 @@ class PartPreviewGenerator
         $this->attachmentHelper = $attachmentHelper;
     }
 
+    /**
+     * Returns a list of attachments that can be used for previewing the part ordered by priority.
+     * The priority is: Part MasterAttachment -> Footprint MasterAttachment -> Category MasterAttachment
+     * -> Storelocation Attachment -> MeasurementUnit Attachment -> ManufacturerAttachment
+     * @param Part $part The part for which the attachments should be determined.
+     * @return Attachment[]
+     */
+    public function getPreviewAttachments(Part $part) : array
+    {
+        $list = [];
+
+        //Master attachment has top priority
+        $attachment = $part->getMasterPictureAttachment();
+        if ($this->isAttachmentValidPicture($attachment)) {
+            $list[] = $attachment;
+        }
+
+        if ($part->getFootprint() !== null) {
+            $attachment = $part->getFootprint()->getMasterPictureAttachment();
+            if ($this->isAttachmentValidPicture($attachment)) {
+                $list[] = $attachment;
+            }
+        }
+
+        if ($part->getCategory() !== null) {
+            $attachment = $part->getCategory()->getMasterPictureAttachment();
+            if ($this->isAttachmentValidPicture($attachment)) {
+                $list[] = $attachment;
+            }
+        }
+
+        foreach ($part->getPartLots() as $lot) {
+            if ($lot->getStorageLocation() !== null) {
+                $attachment = $lot->getStorageLocation()->getMasterPictureAttachment();
+                if ($this->isAttachmentValidPicture($attachment)) {
+                    $list[] = $attachment;
+                }
+            }
+        }
+
+        if ($part->getPartUnit() !== null) {
+            $attachment = $part->getPartUnit()->getMasterPictureAttachment();
+            if ($this->isAttachmentValidPicture($attachment)) {
+                $list[] = $attachment;
+            }
+        }
+
+        if ($part->getManufacturer() !== null) {
+            $attachment = $part->getManufacturer()->getMasterPictureAttachment();
+            if ($this->isAttachmentValidPicture($attachment)) {
+                $list[] = $attachment;
+            }
+        }
+
+        return $list;
+    }
+
     /**
      * Determines what attachment should be used for previewing a part (especially in part table).
      * The returned attachment is guaranteed to be existing and be a picture.
      * @param Part $part The part for which the attachment should be determined
      * @return Attachment|null
      */
-    public function previewAttachment(Part $part) : ?Attachment
+    public function getTablePreviewAttachment(Part $part) : ?Attachment
     {
         //First of all we check if the master attachment of the part is set (and a picture)
         $attachment = $part->getMasterPictureAttachment();