Fix playback progress updates on exit

app/src/main/java/hu/bbara/purefin/app/content/series/SeriesScreen.kt

@@ -15,8 +15,9 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
@@ -80,7 +81,8 @@ private fun SeriesScreenInternal(
         }
         return series.seasons.first()
     }
-    val selectedSeason = remember { mutableStateOf<Season>(getDefaultSeason()) }
+    var selectedSeasonId by remember(series.id) { mutableStateOf(getDefaultSeason().id) }
+    val selectedSeason = series.seasons.firstOrNull { it.id == selectedSeasonId } ?: getDefaultSeason()
     val nextUpEpisode = remember(series) {
         series.seasons.firstNotNullOfOrNull { season ->
             season.episodes.firstOrNull { !it.watched }
@@ -89,8 +91,8 @@ private fun SeriesScreenInternal(
 
     val seriesDownloadState by viewModel.seriesDownloadState.collectAsState()
     val seasonDownloadState by viewModel.seasonDownloadState.collectAsState()
-    LaunchedEffect(selectedSeason.value) {
-        viewModel.observeSeasonDownloadState(selectedSeason.value.episodes)
+    LaunchedEffect(selectedSeason.id, selectedSeason.episodes) {
+        viewModel.observeSeasonDownloadState(selectedSeason.episodes)
     }
 
     Scaffold(
@@ -133,12 +135,12 @@ private fun SeriesScreenInternal(
                 SeriesActionButtons(
                     nextUpEpisode = nextUpEpisode,
                     seriesDownloadState = seriesDownloadState,
-                    selectedSeason = selectedSeason.value,
+                    selectedSeason = selectedSeason,
                     seasonDownloadState = seasonDownloadState,
                     onDownloadOptionSelected = { option ->
                         when (option) {
                             SeriesDownloadOption.SEASON ->
-                                viewModel.downloadSeason(selectedSeason.value.episodes)
+                                viewModel.downloadSeason(selectedSeason.episodes)
                             SeriesDownloadOption.SERIES ->
                                 viewModel.downloadSeries(series)
                             SeriesDownloadOption.SMART ->
@@ -157,11 +159,11 @@ private fun SeriesScreenInternal(
                 Spacer(modifier = Modifier.height(24.dp))
                 SeasonTabs(
                     seasons = series.seasons,
-                    selectedSeason = selectedSeason.value,
-                    onSelect = { selectedSeason.value = it }
+                    selectedSeason = selectedSeason,
+                    onSelect = { selectedSeasonId = it.id }
                 )
                 EpisodeCarousel(
-                    episodes = selectedSeason.value.episodes,
+                    episodes = selectedSeason.episodes,
                 )
                 Spacer(modifier = Modifier.height(16.dp))
                 if(series.cast.isNotEmpty()) {

core/player/src/main/java/hu/bbara/purefin/core/player/manager/PlayerManager.kt

@@ -235,6 +235,16 @@ class PlayerManager @Inject constructor(
         _playbackState.update { it.copy(error = null) }
     }
 
+    fun snapshotProgress(): PlaybackProgressSnapshot {
+        val duration = player.duration.takeIf { it > 0 } ?: _progress.value.durationMs
+        return PlaybackProgressSnapshot(
+            durationMs = duration,
+            positionMs = player.currentPosition,
+            bufferedMs = player.bufferedPosition,
+            isLive = player.isCurrentMediaItemLive
+        )
+    }
+
     private suspend fun applyTrackPreferences() {
         val context = currentMediaContext ?: return
         val preferences = trackPreferencesRepository.getMediaPreferences(context.preferenceKey).firstOrNull() ?: return
@@ -307,15 +317,7 @@ class PlayerManager @Inject constructor(
     private fun startProgressLoop() {
         scope.launch {
             while (isActive) {
-                val duration = player.duration.takeIf { it > 0 } ?: _progress.value.durationMs
-                val position = player.currentPosition
-                val buffered = player.bufferedPosition
-                _progress.value = PlaybackProgressSnapshot(
-                    durationMs = duration,
-                    positionMs = position,
-                    bufferedMs = buffered,
-                    isLive = player.isCurrentMediaItemLive
-                )
+                _progress.value = snapshotProgress()
                 delay(500)
             }
         }

core/player/src/main/java/hu/bbara/purefin/core/player/manager/ProgressManager.kt

@@ -29,6 +29,11 @@ class ProgressManager @Inject constructor(
     private var lastDurationMs: Long = 0L
     private var isPaused: Boolean = false
 
+    fun syncProgress(snapshot: PlaybackProgressSnapshot) {
+        lastPositionMs = snapshot.positionMs
+        lastDurationMs = snapshot.durationMs
+    }
+
     fun bind(
         playbackState: StateFlow<PlaybackStateSnapshot>,
         progress: StateFlow<PlaybackProgressSnapshot>,

core/player/src/main/java/hu/bbara/purefin/core/player/viewmodel/PlayerViewModel.kt

@@ -251,6 +251,7 @@ class PlayerViewModel @Inject constructor(
     override fun onCleared() {
         super.onCleared()
         autoHideJob?.cancel()
+        progressManager.syncProgress(playerManager.snapshotProgress())
         progressManager.release()
         playerManager.release()
     }

feature/shared/src/main/java/hu/bbara/purefin/feature/shared/content/movie/MovieScreenViewModel.kt

@@ -10,8 +10,11 @@ import hu.bbara.purefin.core.model.Movie
 import hu.bbara.purefin.feature.download.DownloadState
 import hu.bbara.purefin.feature.download.MediaDownloadManager
 import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch
 import org.jellyfin.sdk.model.UUID
 import javax.inject.Inject
@@ -23,8 +26,14 @@ class MovieScreenViewModel @Inject constructor(
     private val mediaDownloadManager: MediaDownloadManager
 ): ViewModel() {
 
-    private val _movie = MutableStateFlow<Movie?>(null)
-    val movie = _movie.asStateFlow()
+    private val _movieId = MutableStateFlow<UUID?>(null)
+
+    val movie: StateFlow<Movie?> = combine(
+        _movieId,
+        mediaRepository.movies
+    ) { movieId, movies ->
+        movieId?.let { movies[it] }
+    }.stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), null)
 
     private val _downloadState = MutableStateFlow<DownloadState>(DownloadState.NotDownloaded)
     val downloadState: StateFlow<DownloadState> = _downloadState.asStateFlow()
@@ -34,7 +43,7 @@ class MovieScreenViewModel @Inject constructor(
     }
 
     fun onPlay() {
-        val id = _movie.value?.id?.toString() ?: return
+        val id = movie.value?.id?.toString() ?: return
         navigationManager.navigate(Route.PlayerRoute(mediaId = id))
     }
 
@@ -43,24 +52,16 @@ class MovieScreenViewModel @Inject constructor(
     }
 
     fun selectMovie(movieId: UUID) {
+        _movieId.value = movieId
         viewModelScope.launch {
-            val movie = mediaRepository.movies.value[movieId]
-            if (movie == null) {
-                _movie.value = null
-                return@launch
-            }
-            _movie.value = movie
-
-            launch {
-                mediaDownloadManager.observeDownloadState(movieId.toString()).collect {
-                    _downloadState.value = it
-                }
+            mediaDownloadManager.observeDownloadState(movieId.toString()).collect {
+                _downloadState.value = it
             }
         }
     }
 
     fun onDownloadClick() {
-        val movieId = _movie.value?.id ?: return
+        val movieId = movie.value?.id ?: return
         viewModelScope.launch {
             when (_downloadState.value) {
                 is DownloadState.NotDownloaded, is DownloadState.Failed -> {