Merge pull request #6559 from LibreSign/backport/6557/stable33

[stable33] fix: signature elements without session

Author: vitormattos

lib/Service/SignFileService.php

@@ -337,12 +337,12 @@ private function bindFileElementWithTempFile(FileElement $fileElement, int $node
 	}
 
 	private function getNode(int $nodeId): ?File {
-		if ($this->user instanceof IUser) {
+		try {
 			return $this->folderService->getFileByNodeId($nodeId);
+		} catch (\Throwable) {
+			$filesOfElementes = $this->signerElementsService->getElementsFromSession();
+			return $this->array_find($filesOfElementes, fn ($file) => $file->getId() === $nodeId);
 		}
-
-		$filesOfElementes = $this->signerElementsService->getElementsFromSession();
-		return $this->array_find($filesOfElementes, fn ($file) => $file->getId() === $nodeId);
 	}
 
 	/**

tests/php/Unit/Service/SignFileServiceTest.php

@@ -1488,6 +1488,19 @@ public static function providerSetVisibleElements(): array {
 				isAuthenticatedSigner: true,
 				expectedException: LibresignException::class,
 			),
+
+			'unauthenticated signer with file in folder service (WhatsApp scenario)' => self::createScenarioSetVisibleElements(
+				signerList: [
+					['documentElementId' => $validDocumentId, 'profileNodeId' => $validProfileNodeId],
+				],
+				fileElements: [
+					['id' => $validDocumentId],
+				],
+				tempFiles: [$validProfileNodeId => $vfsPath],
+				signatureFile: [$validProfileNodeId => ['valid' => true, 'content' => 'valid content']],
+				canCreateSignature: true,
+				isAuthenticatedSigner: false,
+			),
 		];
 	}