Feature: [docgen][stored object] handler for request generator and required fixes

src/Bundle/ChillDocGeneratorBundle/Service/Messenger/RequestGenerationHandler.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Chill\DocGeneratorBundle\Service\Messenger;
+
+use Chill\DocGeneratorBundle\Repository\DocGeneratorTemplateRepository;
+use Chill\DocGeneratorBundle\Service\Generator\Generator;
+use Chill\DocStoreBundle\Repository\StoredObjectRepository;
+use Symfony\Component\Messenger\Handler\MessageHandlerInterface;
+
+/**
+ * Handle the request of document generation
+ */
+class RequestGenerationHandler implements MessageHandlerInterface
+{
+    private StoredObjectRepository $storedObjectRepository;
+
+    private DocGeneratorTemplateRepository $docGeneratorTemplateRepository;
+
+    private Generator $generator;
+
+    public function __construct(
+        StoredObjectRepository $storedObjectRepository,
+        DocGeneratorTemplateRepository $docGeneratorTemplateRepository,
+        Generator $generator
+    ) {
+        $this->storedObjectRepository = $storedObjectRepository;
+        $this->docGeneratorTemplateRepository = $docGeneratorTemplateRepository;
+        $this->generator = $generator;
+    }
+
+    public function __invoke(RequestGenerationMessage $message)
+    {
+        if (null === $template = $this->docGeneratorTemplateRepository->find($message->getTemplateId())) {
+            throw new \RuntimeException('template not found: ' . $message->getTemplateId());
+        }
+
+        if (null === $destinationStoredObject = $this->storedObjectRepository->find($message->getDestinationStoredObjectId())) {
+            throw new \RuntimeException('destination stored object not found : ' . $message->getDestinationStoredObjectId());
+        }
+
+        $this->generator->generateDocFromTemplate(
+            $template,
+            $message->getEntityClassName(),
+            $message->getEntityId(),
+            $message->getContextGenerationData(),
+            $destinationStoredObject
+        );
+    }
+
+}