feat: Serialize event data and author userid to webhook

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

lib/private/EventDispatcher/WebhookCaller.php

@@ -28,10 +28,14 @@
 
 use OCP\EventDispatcher\Event;
 use OCP\Http\Client\IClientService;
+use OCP\IUserSession;
+use Psr\Log\LoggerInterface;
 
 class WebhookCaller {
 	public function __construct(
 		private IClientService $clientService,
+		private IUserSession $userSession,
+		private LoggerInterface $logger,
 	) {
 	}
 
@@ -42,12 +46,47 @@ public function callWebhook(
 		array $options,
 	): void {
 		$client = $this->clientService->newClient();
-		$client->request($method, $uri, $options + ['query' => ['event' => $event::class]]);
+		if (!isset($options['body'])) {
+			$options['body'] = json_encode([
+				'event' => $this->serializeEvent($event),
+				'userid' => $this->userSession->getUser()?->getUID() ?? null,
+			]);
+		}
+		try {
+			$response = $client->request($method, $uri, $options + ['query' => ['event' => $event::class]]);
+			$statusCode = $response->getStatusCode();
+			if ($statusCode >= 200 && $statusCode < 300) {
+				$this->logger->warning('Webhook returned unexpected status code '.$statusCode, ['body' => $response->getBody()]);
+			} else {
+				$this->logger->debug('Webhook returned status code '.$statusCode, ['body' => $response->getBody()]);
+			}
+		} catch (\Exception $e) {
+			$this->logger->error('Webhook call failed: '.$e->getMessage(), ['exception' => $e]);
+		}
+	}
 
-		/**
-		 * TODO:
-		 * Serialization of the event
-		 * Timeout or async
-		 */
+	private function serializeEvent(Event $event): array|\JsonSerializable {
+		if ($event instanceof \JsonSerializable) {
+			return $event;
+		} else {
+			/* Event is not serializable, we fallback to reflection to still send something */
+			$data = [];
+			$ref = new \ReflectionClass($event);
+			foreach ($ref->getMethods() as $method) {
+				if (str_starts_with($method->getName(), 'get')) {
+					$key = strtolower(substr($method->getName(), 3));
+					$value = $method->invoke($event);
+					if ($value instanceof \OCP\Files\FileInfo) {
+						$value = [
+							'id' => $value->getId(),
+							'path' => $value->getPath(),
+						];
+					}
+					$data[$key] = $value;
+				}
+			}
+			$this->logger->debug('Webhook had to use fallback to serialize event '.$event::class);
+			return $data;
+		}
 	}
 }