From 947ab42e331af6aaaac74ec78211d2d46855551f Mon Sep 17 00:00:00 2001
From: Niels van Velzen <git@ndat.nl>
Date: Fri, 27 Feb 2026 21:24:17 +0100
Subject: [PATCH] Refactor PlayerBackendEventListener to abstract class

---
 playback/core/src/main/kotlin/PlayerState.kt              | 2 +-
 playback/core/src/main/kotlin/backend/BackendService.kt   | 2 +-
 .../src/main/kotlin/backend/PlayerBackendEventListener.kt | 8 ++++----
 playback/core/src/main/kotlin/queue/QueueService.kt       | 5 +----
 4 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/playback/core/src/main/kotlin/PlayerState.kt b/playback/core/src/main/kotlin/PlayerState.kt
index f23d637d1..bd35346de 100644
--- a/playback/core/src/main/kotlin/PlayerState.kt
+++ b/playback/core/src/main/kotlin/PlayerState.kt
@@ -84,7 +84,7 @@ class MutablePlayerState(
 		get() = backendService.backend?.getPositionInfo() ?: PositionInfo.EMPTY
 
 	init {
-		backendService.addListener(object : PlayerBackendEventListener {
+		backendService.addListener(object : PlayerBackendEventListener() {
 			override fun onPlayStateChange(state: PlayState) {
 				_playState.value = state
 			}
diff --git a/playback/core/src/main/kotlin/backend/BackendService.kt b/playback/core/src/main/kotlin/backend/BackendService.kt
index 95a2714ad..84e84ba12 100644
--- a/playback/core/src/main/kotlin/backend/BackendService.kt
+++ b/playback/core/src/main/kotlin/backend/BackendService.kt
@@ -78,7 +78,7 @@ class BackendService {
 		listeners.remove(listener)
 	}
 
-	inner class BackendEventListener : PlayerBackendEventListener {
+	inner class BackendEventListener : PlayerBackendEventListener() {
 		private fun <T> callListeners(
 			body: PlayerBackendEventListener.() -> T
 		): List<T> = listeners.map { listener -> listener.body() }
diff --git a/playback/core/src/main/kotlin/backend/PlayerBackendEventListener.kt b/playback/core/src/main/kotlin/backend/PlayerBackendEventListener.kt
index 72d456e60..ecd871ad4 100644
--- a/playback/core/src/main/kotlin/backend/PlayerBackendEventListener.kt
+++ b/playback/core/src/main/kotlin/backend/PlayerBackendEventListener.kt
@@ -3,8 +3,8 @@ package org.jellyfin.playback.core.backend
 import org.jellyfin.playback.core.mediastream.PlayableMediaStream
 import org.jellyfin.playback.core.model.PlayState
 
-interface PlayerBackendEventListener {
-	fun onPlayStateChange(state: PlayState)
-	fun onVideoSizeChange(width: Int, height: Int)
-	fun onMediaStreamEnd(mediaStream: PlayableMediaStream)
+abstract class PlayerBackendEventListener {
+	open fun onPlayStateChange(state: PlayState) = Unit
+	open fun onVideoSizeChange(width: Int, height: Int) = Unit
+	open fun onMediaStreamEnd(mediaStream: PlayableMediaStream) = Unit
 }
diff --git a/playback/core/src/main/kotlin/queue/QueueService.kt b/playback/core/src/main/kotlin/queue/QueueService.kt
index 762c4249f..be48f3021 100644
--- a/playback/core/src/main/kotlin/queue/QueueService.kt
+++ b/playback/core/src/main/kotlin/queue/QueueService.kt
@@ -9,7 +9,6 @@ import kotlinx.coroutines.launch
 import org.jellyfin.playback.core.PlaybackManager
 import org.jellyfin.playback.core.backend.PlayerBackendEventListener
 import org.jellyfin.playback.core.mediastream.PlayableMediaStream
-import org.jellyfin.playback.core.model.PlayState
 import org.jellyfin.playback.core.model.PlaybackOrder
 import org.jellyfin.playback.core.model.RepeatMode
 import org.jellyfin.playback.core.plugin.PlayerService
@@ -53,9 +52,7 @@ class QueueService internal constructor() : PlayerService(), Queue {
 		}.launchIn(coroutineScope)
 
 		// Automatically advance when current stream ends
-		manager.backendService.addListener(object : PlayerBackendEventListener {
-			override fun onPlayStateChange(state: PlayState) = Unit
-			override fun onVideoSizeChange(width: Int, height: Int) = Unit
+		manager.backendService.addListener(object : PlayerBackendEventListener() {
 			override fun onMediaStreamEnd(mediaStream: PlayableMediaStream) {
 				coroutineScope.launch {
 					val nextEntry = next(usePlaybackOrder = true, useRepeatMode = true)