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;
@@ -55,15 +56,17 @@ 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)
             ]
         );
     }

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();

templates/Parts/info/_main_infos.html.twig

@@ -1,14 +1,10 @@
 {% import "helper.twig" as helper %}
 
 <div class="row">
-    <div class="col-md-3">
-        {% if part.masterPictureAttachment and part.masterPictureAttachment.picture %}
-            <img src="{{ part.masterPictureAttachment | entityURL('file_view') }}" class="img-fluid img-thumbnail bg-light" alt="Part main image" height="300" width="300">
-        {% else %}
-            <img src="{{ asset('img/part_placeholder.svg') }}" class="img-fluid img-thumbnail bg-light" alt="Part main image" height="300" width="300">
-        {% endif %}
+    <div class="col-md-3 col-lg-4">
+        {% include "Parts/info/_picture.html.twig" %}
     </div>
-    <div class="col-md-9">
+    <div class="col-md-9 col-lg-8">
         <h5 class="text-muted pt-2" title="{% trans %}manufacturer.label{% endtrans %}">
             {% if part.manufacturer %}
                 {% if part.manufacturer.id is not null %}

templates/Parts/info/_picture.html.twig

@@ -0,0 +1,26 @@
+{% if not pictures is empty %}
+    {#  <img src="{{ part.masterPictureAttachment | entityURL('file_view') }}" class="img-fluid img-thumbnail bg-light" alt="Part main image" height="300" width="300"> #}
+
+    <div id="pictureCarousel" class="carousel slide mb-2" data-interval="false">
+        <div class="carousel-inner">
+            {% for pic in pictures %}
+                <div class="carousel-item  {% if loop.first %}active{% endif %}">
+                    <img class="d-block w-100 img-fluid img-thumbnail bg-light" src="{{ pic | entityURL('file_view') }}" alt="">
+                </div>
+            {% endfor %}
+        </div>
+        {% if pictures | length > 1 %}
+            <a class="carousel-control-prev" href="#pictureCarousel" role="button" data-slide="prev">
+                <span class="carousel-control-prev-icon" aria-hidden="true"></span>
+                <span class="sr-only">{% trans %}part.info.prev_picture{% endtrans %}</span>
+            </a>
+            <a class="carousel-control-next" href="#pictureCarousel" role="button" data-slide="next">
+                <span class="carousel-control-next-icon" aria-hidden="true"></span>
+                <span class="sr-only">{% trans %}part.info.next_picture{% endtrans %}</span>
+            </a>
+        {% endif %}
+    </div>
+
+{% else %}
+    <img src="{{ asset('img/part_placeholder.svg') }}" class="img-fluid img-thumbnail bg-light mb-2" alt="Part main image" height="300" width="300">
+{% endif %}