feat(cache): cache extracted fields from collabora

Signed-off-by: Elizabeth Danzberger <lizzy7128@tutanota.de>

[skip ci]

lib/Service/TemplateFieldService.php

@@ -13,15 +13,20 @@
 use OCP\Files\Template\Field;
 use OCP\Files\Template\FieldType;
 use OCP\Http\Client\IClientService;
+use OCP\ICache;
+use OCP\ICacheFactory;
 use Psr\Log\LoggerInterface;
 
 class TemplateFieldService {
+	private ICache $cache;
+
 	public function __construct(
 		private IClientService $clientService,
 		private CapabilitiesService $capabilitiesService,
 		private AppConfig $appConfig,
 		private IRootFolder $rootFolder,
-		private LoggerInterface $logger
+		private LoggerInterface $logger,
+		private ICacheFactory $cacheFactory
 	) {
 	}
 
@@ -76,7 +81,10 @@ public function extractFields(Node|int $file) {
 				];
 			}
 
-			return array_merge([], ...$fields);
+			$fields = array_merge([], ...$fields);
+			$localCache->set($cacheName, $fields, 3600);
+
+			return $fields;
 		} catch (\Exception $e) {
 			$this->logger->error($e->getMessage());
 			return [];