fix(dav): Fix user status "Undefined array key 0 at StatusService.php#98"

Signed-off-by: Joas Schilling <coding@schilljs.com>

apps/dav/lib/CalDAV/Status/StatusService.php

@@ -94,12 +94,15 @@ class StatusService {
 		}
 
 		// Filter events to see if we have any that apply to the calendar status
-		$applicableEvents = array_filter($calendarEvents, function (array $calendarEvent) use ($userStatusTimestamp) {
+		$applicableEvents = array_filter($calendarEvents, static function (array $calendarEvent) use ($userStatusTimestamp): bool {
+			if (empty($calendarEvent['objects'])) {
+				return false;
+			}
 			$component = $calendarEvent['objects'][0];
-			if(isset($component['X-NEXTCLOUD-OUT-OF-OFFICE'])) {
+			if (isset($component['X-NEXTCLOUD-OUT-OF-OFFICE'])) {
 				return false;
 			}
-			if(isset($component['DTSTART']) && $userStatusTimestamp !== null) {
+			if (isset($component['DTSTART']) && $userStatusTimestamp !== null) {
 				/** @var DateTimeImmutable $dateTime */
 				$dateTime = $component['DTSTART'][0];
 				$timestamp = $dateTime->getTimestamp();
@@ -108,7 +111,7 @@ class StatusService {
 				}
 			}
 			// Ignore events that are transparent
-			if(isset($component['TRANSP']) && strcasecmp($component['TRANSP'][0], 'TRANSPARENT') === 0) {
+			if (isset($component['TRANSP']) && strcasecmp($component['TRANSP'][0], 'TRANSPARENT') === 0) {
 				return false;
 			}
 			return true;

apps/dav/tests/unit/CalDAV/Status/StatusServiceTest.php

@@ -229,6 +229,50 @@ class StatusServiceTest extends TestCase {
 		$this->service->processCalendarStatus('admin');
 	}
 
+	public function testCalendarNoEventObjects(): void {
+		$user = $this->createConfiguredMock(IUser::class, [
+			'getUID' => 'admin',
+		]);
+
+		$this->userManager->expects(self::once())
+			->method('get')
+			->willReturn($user);
+		$this->availabilityCoordinator->expects(self::once())
+			->method('getCurrentOutOfOfficeData')
+			->willReturn(null);
+		$this->availabilityCoordinator->expects(self::never())
+			->method('isInEffect');
+		$this->cache->expects(self::once())
+			->method('get')
+			->willReturn(null);
+		$this->cache->expects(self::once())
+			->method('set');
+		$this->calendarManager->expects(self::once())
+			->method('getCalendarsForPrincipal')
+			->willReturn([$this->createMock(CalendarImpl::class)]);
+		$this->calendarManager->expects(self::once())
+			->method('newQuery')
+			->willReturn(new CalendarQuery('admin'));
+		$this->timeFactory->expects(self::exactly(2))
+			->method('getDateTime')
+			->willReturn(new \DateTime());
+		$this->userStatusService->expects(self::once())
+			->method('findByUserId')
+			->willThrowException(new DoesNotExistException(''));
+		$this->calendarManager->expects(self::once())
+			->method('searchForPrincipal')
+			->willReturn([['objects' => []]]);
+		$this->userStatusService->expects(self::once())
+			->method('revertUserStatus');
+		$this->logger->expects(self::once())
+			->method('debug');
+		$this->userStatusService->expects(self::never())
+			->method('setUserStatus');
+
+
+		$this->service->processCalendarStatus('admin');
+	}
+
 	public function testCalendarEvent(): void {
 		$user = $this->createConfiguredMock(IUser::class, [
 			'getUID' => 'admin',