Only send 1 HPB request for the "end call for everyone" case

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

3 files changed, 90 insertions, 2 deletions

diff --git a/lib/Events/EndCallForEveryoneEvent.php b/lib/Events/EndCallForEveryoneEvent.php
new file mode 100644
index 000000000..a080e5f07
--- /dev/null
+++ b/lib/Events/EndCallForEveryoneEvent.php
@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019 Joas Schilling <coding@schilljs.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\Talk\Events;
+
+use OCA\Talk\Participant;
+use OCA\Talk\Room;
+
+class EndCallForEveryoneEvent extends ModifyRoomEvent {
+
+	/** @var string[] */
+	protected $sessionIds;
+
+	public function __construct(Room $room,
+								?Participant $actor = null) {
+		parent::__construct($room, 'in_call', Participant::FLAG_DISCONNECTED, null, $actor);
+	}
+
+	/**
+	 * @param string[] $sessionIds
+	 * @return void
+	 */
+	public function setSessionIds(array $sessionIds): void {
+		$this->sessionIds = $sessionIds;
+	}
+
+	/**
+	 * Only available in the after-event
+	 * @return string[]
+	 */
+	public function getSessionIds(): array {
+		return $this->sessionIds;
+	}
+}
diff --git a/lib/Service/ParticipantService.php b/lib/Service/ParticipantService.php
index d11bf996e..2bd4010fd 100644
--- a/lib/Service/ParticipantService.php
+++ b/lib/Service/ParticipantService.php
@@ -30,11 +30,11 @@ use OCA\Talk\Config;
 use OCA\Talk\Events\AddParticipantsEvent;
 use OCA\Talk\Events\AttendeesAddedEvent;
 use OCA\Talk\Events\AttendeesRemovedEvent;
+use OCA\Talk\Events\EndCallForEveryoneEvent;
 use OCA\Talk\Events\JoinRoomGuestEvent;
 use OCA\Talk\Events\JoinRoomUserEvent;
 use OCA\Talk\Events\ModifyEveryoneEvent;
 use OCA\Talk\Events\ModifyParticipantEvent;
-use OCA\Talk\Events\ModifyRoomEvent;
 use OCA\Talk\Events\ParticipantEvent;
 use OCA\Talk\Events\RemoveParticipantEvent;
 use OCA\Talk\Events\RemoveUserEvent;
@@ -908,16 +908,20 @@ class ParticipantService {
 	}
 
 	public function endCallForEveryone(Room $room, Participant $moderator): void {
-		$event = new ModifyRoomEvent($room, 'in_call', Participant::FLAG_DISCONNECTED, null, $moderator);
+		$event = new EndCallForEveryoneEvent($room, $moderator);
 		$this->dispatcher->dispatch(Room::EVENT_BEFORE_END_CALL_FOR_EVERYONE, $event);
 
 		$participants = $this->getParticipantsInCall($room);
+		$changedSessionIds = [];
 
 		// kick out all participants out of the call
 		foreach ($participants as $participant) {
+			$changedSessionIds[] = $participant->getSession()->getSessionId();
 			$this->changeInCall($room, $participant, Participant::FLAG_DISCONNECTED, true);
 		}
 
+		$event->setSessionIds($changedSessionIds);
+
 		$this->dispatcher->dispatch(Room::EVENT_AFTER_END_CALL_FOR_EVERYONE, $event);
 	}
 
diff --git a/lib/Signaling/Listener.php b/lib/Signaling/Listener.php
index 829218efc..dce9087a0 100644
--- a/lib/Signaling/Listener.php
+++ b/lib/Signaling/Listener.php
@@ -28,6 +28,8 @@ use OCA\Talk\Config;
 use OCA\Talk\Events\AddParticipantsEvent;
 use OCA\Talk\Events\ChatEvent;
 use OCA\Talk\Events\ChatParticipantEvent;
+use OCA\Talk\Events\EndCallForEveryoneEvent;
+use OCA\Talk\Events\ModifyEveryoneEvent;
 use OCA\Talk\Events\ModifyParticipantEvent;
 use OCA\Talk\Events\ParticipantEvent;
 use OCA\Talk\Events\RemoveParticipantEvent;
@@ -235,6 +237,13 @@ class Listener {
 				return;
 			}
 
+			if ($event instanceof ModifyEveryoneEvent) {
+				// If everyone is disconnected, we will not do O(n) requests.
+				// Instead, the listener of Room::EVENT_AFTER_END_CALL_FOR_EVERYONE
+				// will send all sessions to the HPB with 1 request.
+				return;
+			}
+
 			/** @var BackendNotifier $notifier */
 			$notifier = \OC::$server->get(BackendNotifier::class);
 
@@ -259,6 +268,27 @@ class Listener {
 		$dispatcher->addListener(Room::EVENT_AFTER_SESSION_UPDATE_CALL_FLAGS, $listener);
 		$dispatcher->addListener(Room::EVENT_AFTER_SESSION_LEAVE_CALL, $listener);
 
+		$dispatcher->addListener(Room::EVENT_AFTER_END_CALL_FOR_EVERYONE, static function (EndCallForEveryoneEvent $event): void {
+			if (self::isUsingInternalSignaling()) {
+				return;
+			}
+
+			$sessionIds = $event->getSessionIds();
+
+			if (empty($sessionIds)) {
+				return;
+			}
+
+			/** @var BackendNotifier $notifier */
+			$notifier = \OC::$server->get(BackendNotifier::class);
+
+			$notifier->roomInCallChanged(
+				$event->getRoom(),
+				$event->getNewValue(),
+				$sessionIds
+			);
+		});
+
 		$dispatcher->addListener(Room::EVENT_AFTER_GUESTS_CLEAN, static function (RoomEvent $event) {
 			if (self::isUsingInternalSignaling()) {
 				return;