fix: throw error when target has DND on

lib/Controller/CallController.php

@@ -183,8 +183,8 @@ public function ringAttendee(int $attendeeId): DataResponse {
 
 		try {
 			$this->participantService->sendCallNotificationForAttendee($this->room, $this->participant, $attendeeId);
-		} catch (\InvalidArgumentException) {
-			return new DataResponse([], Http::STATUS_BAD_REQUEST);
+		} catch (\InvalidArgumentException $e) {
+			return new DataResponse(['error' => $e->getMessage()], Http::STATUS_BAD_REQUEST);
 		} catch (DoesNotExistException) {
 			return new DataResponse([], Http::STATUS_NOT_FOUND);
 		}

lib/Service/ParticipantService.php

@@ -71,6 +71,8 @@
 use OCP\IUserManager;
 use OCP\Security\ISecureRandom;
 use OCP\Server;
+use OCP\UserStatus\IManager as IUserStatusManager;
+use OCP\UserStatus\IUserStatus;
 
 class ParticipantService {
 
@@ -95,6 +97,7 @@ public function __construct(
 		private BackendNotifier $backendNotifier,
 		private ITimeFactory $timeFactory,
 		private ICacheFactory $cacheFactory,
+		private IUserStatusManager $userStatusManager,
 	) {
 	}
 
@@ -1181,6 +1184,11 @@ public function sendCallNotificationForAttendee(Room $room, Participant $current
 			throw new DoesNotExistException('Room mismatch');
 		}
 
+		$userStatus = $this->userStatusManager->getUserStatuses([$attendee->getActorId()]);
+		if (isset($userStatus[$attendee->getActorId()]) && $userStatus[$attendee->getActorId()]->getStatus() === IUserStatus::DND) {
+			throw new \InvalidArgumentException('status');
+		}
+
 		$sessions = $this->sessionMapper->findByAttendeeId($targetAttendeeId);
 		foreach ($sessions as $session) {
 			if ($session->getInCall() !== Participant::FLAG_DISCONNECTED) {

tests/integration/features/callapi/notifications.feature

@@ -76,6 +76,24 @@ Feature: callapi/notifications
     Then user "participant2" has the following notifications
       | app    | object_type | object_id | subject                          |
       | spreed | call        | room      | A group call has started in room |
+
+  Scenario: Calling an attendee that is in DND throws an error 'status' message with 400
+    When user "participant1" creates room "room" (v4)
+      | roomType | 2 |
+      | roomName | room |
+    And user "participant1" adds user "participant2" to room "room" with 200 (v4)
+    Given user "participant1" joins room "room" with 200 (v4)
+    Given user "participant2" joins room "room" with 200 (v4)
+    Given user "participant1" loads attendees attendee ids in room "room" (v4)
+    And user "participant2" sets status to "dnd" with 200 (v4)
+    Given user "participant1" joins call "room" with 200 (v4)
+      | silent | true |
+    Then user "participant2" has the following notifications
+      | app | object_type | object_id | subject |
+    Given user "participant1" pings user "participant2" to join call "room" with 400 (v4)
+    Then the request is rejected with the following error message
+      | status | message |
+      | 400    | status |
 
   Scenario: Lobby: No call notification sent for users that are blocked by the lobby
     Given user "participant1" creates room "room" (v4)