Introduce ConversionWithSameMimeTypeException for improved error handling in document conversion.

- Added the `ConversionWithSameMimeTypeException` to handle cases where document conversion is requested for the same MIME type.
- Updated `StoredObjectToPdfConverter` to throw the new exception when encountering such cases.
- Enhanced error logging in `PostSendExternalMessageHandler` to capture these specific conversion errors.

.changes/unreleased/Fixed-20251003-130249.yaml

@@ -0,0 +1,6 @@
+kind: Fixed
+body: Add exception handling for conversion of attachment on sending external, when documens are already in pdf
+time: 2025-10-03T13:02:49.524835257+02:00
+custom:
+    Issue: ""
+    SchemaChange: No schema change

src/Bundle/ChillDocStoreBundle/Exception/ConversionWithSameMimeTypeException.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\DocStoreBundle\Exception;
+
+class ConversionWithSameMimeTypeException extends \RuntimeException
+{
+    public function __construct(string $mimeType, ?\Throwable $previous = null)
+    {
+        parent::__construct("Conversion to same MIME type '{$mimeType}' is not allowed: already at the same MIME type", 0, $previous);
+    }
+}

src/Bundle/ChillDocStoreBundle/Service/StoredObjectToPdfConverter.php

@@ -15,6 +15,7 @@ use Chill\DocStoreBundle\Entity\StoredObject;
 use Chill\DocStoreBundle\Entity\StoredObjectPointInTime;
 use Chill\DocStoreBundle\Entity\StoredObjectPointInTimeReasonEnum;
 use Chill\DocStoreBundle\Entity\StoredObjectVersion;
+use Chill\DocStoreBundle\Exception\ConversionWithSameMimeTypeException;
 use Chill\DocStoreBundle\Exception\StoredObjectManagerException;
 use Chill\WopiBundle\Service\WopiConverter;
 use Symfony\Component\Mime\MimeTypesInterface;
@@ -44,6 +45,7 @@ class StoredObjectToPdfConverter
      * @throws \UnexpectedValueException           if the preferred mime type for the conversion is not found
      * @throws \RuntimeException                   if the conversion or storage of the new version fails
      * @throws StoredObjectManagerException
+     * @throws ConversionWithSameMimeTypeException if the document has already the same mime type79*
      */
     public function addConvertedVersion(StoredObject $storedObject, string $lang, $convertTo = 'pdf', bool $includeConvertedContent = false): array
     {
@@ -56,7 +58,7 @@ class StoredObjectToPdfConverter
         $currentVersion = $storedObject->getCurrentVersion();
 
         if ($currentVersion->getType() === $newMimeType) {
-            throw new \UnexpectedValueException('Already at the same mime type');
+            throw new ConversionWithSameMimeTypeException($newMimeType);
         }
 
         $content = $this->storedObjectManager->read($currentVersion);

src/Bundle/ChillMainBundle/Workflow/Messenger/PostSendExternalMessageHandler.php

@@ -11,6 +11,7 @@ declare(strict_types=1);
 
 namespace Chill\MainBundle\Workflow\Messenger;
 
+use Chill\DocStoreBundle\Exception\ConversionWithSameMimeTypeException;
 use Chill\DocStoreBundle\Exception\StoredObjectManagerException;
 use Chill\DocStoreBundle\Service\StoredObjectToPdfConverter;
 use Chill\MainBundle\Entity\Workflow\EntityWorkflow;
@@ -55,6 +56,8 @@ final readonly class PostSendExternalMessageHandler implements MessageHandlerInt
                 $this->storedObjectToPdfConverter->addConvertedVersion($attachment->getProxyStoredObject(), $locale);
             } catch (StoredObjectManagerException $e) {
                 $this->logger->error('Error converting attachment to PDF', ['backtrace' => $e->getTraceAsString(), 'attachment_id' => $attachment->getId()]);
+            } catch (ConversionWithSameMimeTypeException $e) {
+                $this->logger->error('Error converting attachment to PDF: already at the same MIME type', ['backtrace' => $e->getTraceAsString(), 'attachment_id' => $attachment->getId()]);
             }
         }
 
@@ -65,6 +68,8 @@ final readonly class PostSendExternalMessageHandler implements MessageHandlerInt
                 $this->storedObjectToPdfConverter->addConvertedVersion($storedObject, $locale);
             } catch (StoredObjectManagerException $e) {
                 $this->logger->error('Error converting stored object to PDF', ['backtrace' => $e->getTraceAsString(), 'stored_object_id' => $storedObject->getId(), 'workflow_id' => $entityWorkflow->getId()]);
+            } catch (ConversionWithSameMimeTypeException $e) {
+                $this->logger->error('Error converting stored object to PDF: already at the same MIME type', ['backtrace' => $e->getTraceAsString(), 'stored_object_id' => $storedObject->getId(), 'workflow_id' => $entityWorkflow->getId()]);
             }
         }
     }