fix(templates): include ooxml types in form filling

MS office MIME types should be considered in addition to OpenDocument
types when creating a document from a template. This allows support for
form filling on the MS office document types

Assisted-by: ClaudeCode:claude-sonnet-5
Signed-off-by: Elizabeth Danzberger <elizabeth@elzody.dev>

Author: elzody

lib/Service/TemplateFieldService.php

@@ -66,7 +66,7 @@ public function extractFields(Node|int $file): array {
 				return $fields;
 			}
 
-			if (!in_array($file->getMimetype(), Capabilities::MIMETYPES)) {
+			if (!in_array($file->getMimetype(), array_merge(Capabilities::MIMETYPES, Capabilities::MIMETYPES_MSOFFICE))) {
 				return [];
 			}
 

tests/lib/Service/TemplateFieldServiceTest.php

@@ -0,0 +1,103 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace Tests\Richdocuments;
+
+use OCA\Richdocuments\AppConfig;
+use OCA\Richdocuments\Service\CapabilitiesService;
+use OCA\Richdocuments\Service\PdfService;
+use OCA\Richdocuments\Service\RemoteService;
+use OCA\Richdocuments\Service\TemplateFieldService;
+use OCP\Files\File;
+use OCP\Files\IRootFolder;
+use OCP\Files\Storage\IStorage;
+use OCP\ICache;
+use OCP\ICacheFactory;
+use OCP\ITempManager;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+use Psr\Log\LoggerInterface;
+
+class TemplateFieldServiceTest extends TestCase {
+	private IRootFolder&MockObject $rootFolder;
+	private ICacheFactory&MockObject $cacheFactory;
+	private ICache&MockObject $cache;
+	private RemoteService&MockObject $remoteService;
+	private LoggerInterface&MockObject $logger;
+	private TemplateFieldService $service;
+
+	protected function setUp(): void {
+		parent::setUp();
+		$this->rootFolder = $this->createMock(IRootFolder::class);
+		$this->cacheFactory = $this->createMock(ICacheFactory::class);
+		$this->cache = $this->createMock(ICache::class);
+		$this->remoteService = $this->createMock(RemoteService::class);
+		$this->logger = $this->createMock(LoggerInterface::class);
+
+		$this->cacheFactory->method('createLocal')->willReturn($this->cache);
+		$this->cache->method('get')->willReturn(null);
+
+		$this->service = new TemplateFieldService(
+			$this->createMock(\OCP\Http\Client\IClientService::class),
+			$this->createMock(CapabilitiesService::class),
+			$this->createMock(AppConfig::class),
+			$this->rootFolder,
+			$this->logger,
+			$this->cacheFactory,
+			$this->remoteService,
+			$this->createMock(ITempManager::class),
+			$this->createMock(PdfService::class),
+			'testuser',
+		);
+	}
+
+	private function createFileMock(string $mimetype): File&MockObject {
+		$storage = $this->createMock(IStorage::class);
+		$storage->method('fopen')->willReturn(fopen('php://memory', 'r'));
+
+		$file = $this->createMock(File::class);
+		$file->method('getId')->willReturn(42);
+		$file->method('getEtag')->willReturn('etag-42');
+		$file->method('getName')->willReturn('template.docx');
+		$file->method('getInternalPath')->willReturn('files/template.docx');
+		$file->method('getMimetype')->willReturn($mimetype);
+		$file->method('getStorage')->willReturn($storage);
+
+		return $file;
+	}
+
+	public function testExtractFieldsReturnsEmptyForUnsupportedMimetype(): void {
+		$file = $this->createFileMock('application/octet-stream');
+
+		$this->remoteService->expects($this->never())->method('extractDocumentStructure');
+
+		$result = $this->service->extractFields($file);
+		$this->assertEquals([], $result);
+	}
+
+	public function testExtractFieldsCallsRemoteServiceForOdfMimetype(): void {
+		$file = $this->createFileMock('application/vnd.oasis.opendocument.text');
+
+		$this->remoteService->expects($this->once())
+			->method('extractDocumentStructure')
+			->willReturn([]);
+
+		$this->service->extractFields($file);
+	}
+
+	public function testExtractFieldsCallsRemoteServiceForOoxmlMimetype(): void {
+		$file = $this->createFileMock('application/vnd.openxmlformats-officedocument.wordprocessingml.document');
+
+		$this->remoteService->expects($this->once())
+			->method('extractDocumentStructure')
+			->willReturn([]);
+
+		$this->service->extractFields($file);
+	}
+}