Update Signature App.vue to use a converted pdf

Introduced a new helper ts function to download documents as PDFs and integrated with the existing workflow. Enhanced `PDFSignatureZoneAvailable` to implement `LocaleAwareInterface` for better locale management and added PDF conversion handling for non-PDF documents. Updated App.vue to use the new PDF download method.

src/Bundle/ChillDocStoreBundle/Resources/public/vuejs/DocumentSignature/App.vue

@@ -277,7 +277,7 @@ console.log(PdfWorker); // incredible but this is needed
 // pdfjsLib.GlobalWorkerOptions.workerSrc = PdfWorker;
 
 import Modal from "ChillMainAssets/vuejs/_components/Modal.vue";
-import { download_and_decrypt_doc } from "../StoredObjectButton/helpers";
+import {download_and_decrypt_doc, download_doc_as_pdf} from "../StoredObjectButton/helpers";
 
 pdfjsLib.GlobalWorkerOptions.workerSrc = "pdfjs-dist/build/pdf.worker.mjs";
 
@@ -385,10 +385,7 @@ const init = () => downloadAndOpen().then(initPdf);
 async function downloadAndOpen(): Promise<Blob> {
   let raw;
   try {
-    raw = await download_and_decrypt_doc(
-      signature.storedObject,
-      signature.storedObject.currentVersion
-    );
+    raw = await download_doc_as_pdf(signature.storedObject);
   } catch (e) {
     console.error("error while downloading and decrypting document", e);
     throw e;

src/Bundle/ChillDocStoreBundle/Resources/public/vuejs/StoredObjectButton/helpers.ts

@@ -197,6 +197,32 @@ async function download_and_decrypt_doc(storedObject: StoredObject, atVersion: n
    }
 }
 
+/**
+ * Fetch the stored object as a pdf.
+ *
+ * If the document is already in a pdf on the server side, the document is retrieved "as is" from the usual
+ * storage.
+ */
+async function download_doc_as_pdf(storedObject: StoredObject): Promise<Blob>
+{
+    if (null === storedObject.currentVersion) {
+        throw new Error("the stored object does not count any version");
+    }
+
+    if (storedObject.currentVersion?.type === 'application/pdf') {
+        return download_and_decrypt_doc(storedObject, storedObject.currentVersion);
+    }
+
+    const convertLink = build_convert_link(storedObject.uuid);
+    const response = await fetch(convertLink);
+
+    if (!response.ok) {
+        throw new Error("Could not convert the document: " + response.status);
+    }
+
+    return response.blob();
+}
+
 async function is_object_ready(storedObject: StoredObject): Promise<StoredObjectStatusChange>
 {
     const new_status_response = await window
@@ -214,6 +240,7 @@ export {
   build_wopi_editor_link,
   download_and_decrypt_doc,
   download_doc,
+  download_doc_as_pdf,
   is_extension_editable,
   is_extension_viewable,
   is_object_ready,

src/Bundle/ChillDocStoreBundle/Service/Signature/PDFSignatureZoneAvailable.php

@@ -17,15 +17,30 @@ use Chill\MainBundle\Entity\Workflow\EntityWorkflowSignatureStateEnum;
 use Chill\MainBundle\Entity\Workflow\EntityWorkflowStep;
 use Chill\MainBundle\Entity\Workflow\EntityWorkflowStepSignature;
 use Chill\MainBundle\Workflow\EntityWorkflowManager;
+use Chill\WopiBundle\Service\WopiConverter;
+use Symfony\Contracts\Translation\LocaleAwareInterface;
 
-class PDFSignatureZoneAvailable
+class PDFSignatureZoneAvailable implements LocaleAwareInterface
 {
+    private string $locale;
+
     public function __construct(
         private readonly EntityWorkflowManager $entityWorkflowManager,
         private readonly PDFSignatureZoneParser $pdfSignatureZoneParser,
         private readonly StoredObjectManagerInterface $storedObjectManager,
+        private readonly WopiConverter $converter,
     ) {}
 
+    public function setLocale(string $locale)
+    {
+        $this->locale = $locale;
+    }
+
+    public function getLocale()
+    {
+        return $this->locale;
+    }
+
     /**
      * @return list<PDFSignatureZone>
      */
@@ -38,10 +53,16 @@ class PDFSignatureZoneAvailable
         }
 
         if ('application/pdf' !== $storedObject->getType()) {
-            throw new \RuntimeException('Only PDF documents are supported');
+            $content = $this->converter->convert($this->getLocale(), $this->storedObjectManager->read($storedObject), $storedObject->getType());
+        } else {
+            $content = $this->storedObjectManager->read($storedObject);
         }
 
-        $zones = $this->pdfSignatureZoneParser->findSignatureZones($this->storedObjectManager->read($storedObject));
+        $zones = $this->pdfSignatureZoneParser->findSignatureZones($content);
+
+        // free some memory as soon as possible...
+        unset($content);
+
         $signatureZonesIndexes = array_map(
             fn (EntityWorkflowStepSignature $step) => $step->getZoneSignatureIndex(),
             $this->collectSignaturesInUse($entityWorkflow)

src/Bundle/ChillDocStoreBundle/Tests/Service/Signature/PDFSignatureZoneAvailableTest.php

@@ -22,6 +22,7 @@ use Chill\MainBundle\Entity\Workflow\EntityWorkflowSignatureStateEnum;
 use Chill\MainBundle\Workflow\EntityWorkflowManager;
 use Chill\MainBundle\Workflow\WorkflowTransitionContextDTO;
 use Chill\PersonBundle\Entity\Person;
+use Chill\WopiBundle\Service\WopiConverter;
 use PHPUnit\Framework\TestCase;
 use Prophecy\PhpUnit\ProphecyTrait;
 use Symfony\Component\Clock\MockClock;
@@ -65,6 +66,7 @@ class PDFSignatureZoneAvailableTest extends TestCase
             $entityWorkflowManager->reveal(),
             $parser->reveal(),
             $storedObjectManager->reveal(),
+            $this->prophesize(WopiConverter::class)->reveal(),
         );
 
         $actual = $filter->getAvailableSignatureZones($entityWorkflow);