Add guard to block signatures on related entities without objects

Implemented a guard to prevent signatures on related entities that lack a stored object. It also includes corresponding tests and added translation for the error message in French.

src/Bundle/ChillMainBundle/Workflow/EventSubscriber/BlockSignatureOnRelatedEntityWithoutAnyStoredObjectGuard.php

@@ -0,0 +1,57 @@
+<?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\MainBundle\Workflow\EventSubscriber;
+
+use Chill\MainBundle\Entity\Workflow\EntityWorkflow;
+use Chill\MainBundle\Workflow\EntityWorkflowManager;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\Workflow\Event\GuardEvent;
+use Symfony\Component\Workflow\TransitionBlocker;
+
+class BlockSignatureOnRelatedEntityWithoutAnyStoredObjectGuard implements EventSubscriberInterface
+{
+    public function __construct(private EntityWorkflowManager $entityWorkflowManager) {}
+
+    public static function getSubscribedEvents()
+    {
+        return [
+            'workflow.guard' => [
+                ['blockSignatureIfNoStoredObject', 0],
+            ],
+        ];
+    }
+
+    public function blockSignatureIfNoStoredObject(GuardEvent $event): void
+    {
+        $entityWorkflow = $event->getSubject();
+
+        if (!$entityWorkflow instanceof EntityWorkflow) {
+            return;
+        }
+
+        $metadataStore = $event->getWorkflow()->getMetadataStore();
+
+        foreach ($event->getTransition()->getTos() as $to) {
+            $placeMetadata = $metadataStore->getPlaceMetadata($to);
+            if ([] !== ($placeMetadata['isSignature'] ?? [])) {
+                if (!$this->entityWorkflowManager->canAssociateStoredObject($entityWorkflow)) {
+                    $event->addTransitionBlocker(
+                        new TransitionBlocker(
+                            'workflow.May not associate a document',
+                            'e8e28caa-a106-11ef-97e8-f3919e8b5c8a'
+                        )
+                    );
+                }
+            }
+        }
+    }
+}