Merge d48b0a2f65 into fab60107e3

Bumps [softprops/action-gh-release](https://github.com/softprops/action-gh-release) from 2 to 3.
- [Release notes](https://github.com/softprops/action-gh-release/releases)
- [Changelog](https://github.com/softprops/action-gh-release/blob/master/CHANGELOG.md)
- [Commits](https://github.com/softprops/action-gh-release/compare/v2...v3)

---
updated-dependencies:
- dependency-name: softprops/action-gh-release
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/spotube-release-binary.yml

@@ -425,7 +425,7 @@ jobs:
           done
 
       - name: Create Release
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@v3
         with:
           tag_name: ${{ steps.vars.outputs.tag }}
           name: ${{ steps.vars.outputs.release_name }}

AGENTS.md

@@ -31,6 +31,7 @@
 - `plugin_interfaces` also has a JS target (`browser()`), used by the plugin system.
 
 ## UI component patterns
+- **ALL user-facing strings MUST come from `composeApp/src/commonMain/composeResources/values/strings.xml` via `stringResource(Res.string.xxx)`.** Never hardcode a literal string in a `Text(...)`, dialog title, button label, content description, placeholder, or error message inside `@Composable` code. If the string you need doesn't exist yet, add a new `<string name="...">` entry to `strings.xml` (grouped near related keys, following the existing `feature_context_purpose` naming convention) and reference it — do not inline the text "just this once". This applies to every module, including ones you're about to add (dialogs, screens, snackbars, etc.), not just `modules/settings`. `strings.xml` is the single source of truth for copy, not a showcase file for one screen.
 - **ViewModels own ALL state and logic.** Composables are dumb renderers: they collect a single `StateFlow<UiState>` from the ViewModel and forward user events (clicks, text input, drag callbacks) back to ViewModel functions. No business logic, filtering, derivation, reordering buffers, or `LaunchedEffect`-based state syncing belongs in a composable — it goes in the ViewModel. The `combine`/`stateIn` flow chain in the ViewModel must produce fully-computed, ready-to-render UI state so the composable never needs intermediate `remember` derivations or `mutableStateListOf` mirrors.
 - **AdaptiveDropdownBottomSheet** (`commonMain/.../core/ui/component/AdaptiveDropdownBottomSheet.kt`): switches between `DropdownMenu` (large screen) and `ModalBottomSheet` (small screen) via `currentWindowAdaptiveInfo()`. Do NOT use expect/actual — all adaptive components that rely ONLY on Compose/Material3 APIs belong in commonMain.
 - **AdaptiveDialogBottomSheet** (`commonMain/.../core/ui/component/AdaptiveDialogBottomSheet.kt`): switches between `ThemedDialog` (large screen) and `ModalBottomSheet` (small screen) via `currentWindowAdaptiveInfo()`. Same rule — keep in commonMain unless platform-specific APIs are required.

composeApp/src/commonMain/composeResources/values/strings.xml

@@ -198,4 +198,12 @@
     <string name="player_go_to_album">Go to album</string>
     <string name="player_sleep_timer">Sleep timer</string>
     <string name="player_track_details">Track details</string>
+
+    <string name="update_action_ignore">Ignore</string>
+    <string name="update_action_update">Update</string>
+    <string name="app_update_dialog_title">Spotube %1$s is available</string>
+    <string name="app_update_dialog_no_notes">See what\'s new in this release on the Spotube downloads page.</string>
+    <string name="plugin_update_dialog_title">%1$s %2$s is available</string>
+    <string name="plugin_update_dialog_current_version">Currently installed: %1$s</string>
+    <string name="plugin_update_dialog_no_notes">See what\'s new in this update from the plugin\'s page.</string>
 </resources>

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/App.kt

@@ -22,30 +22,20 @@ import androidx.compose.animation.SharedTransitionLayout
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.text.selection.SelectionContainer
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.vector.ImageVector
-import androidx.compose.ui.text.font.FontWeight
-import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.navigation3.ui.NavDisplay
-import com.mikepenz.markdown.m3.Markdown
 import dev.krtirtho.spotube.core.navigation.Navigator
 import dev.krtirtho.spotube.core.navigation.Routes
 import dev.krtirtho.spotube.core.navigation.TOP_LEVEL_ROUTES
 import dev.krtirtho.spotube.core.navigation.rememberNavigationState
 import dev.krtirtho.spotube.core.navigation.toEntries
 import dev.krtirtho.spotube.core.ui.base.LocalBaseUITheme
-import dev.krtirtho.spotube.core.ui.base.OutlineButton
-import dev.krtirtho.spotube.core.ui.base.PrimaryButton
-import dev.krtirtho.spotube.core.ui.base.ThemedDialog
 import dev.krtirtho.spotube.core.ui.base.rememberBaseUITheme
 import dev.krtirtho.spotube.core.ui.component.LocalSharedTransitionScope
 import dev.krtirtho.spotube.core.ui.theming.SpotubeTheme
@@ -53,7 +43,10 @@ import dev.krtirtho.spotube.modules.library.LibraryTab
 import dev.krtirtho.spotube.modules.settings.SettingsRepository
 import dev.krtirtho.spotube.modules.settings.UserSettings
 import dev.krtirtho.spotube.modules.shell.AppShell
-import dev.krtirtho.spotube.modules.update.UpdateCheckerViewModel
+import dev.krtirtho.spotube.modules.update.AppUpdateDialog
+import dev.krtirtho.spotube.modules.update.AppUpdateService
+import dev.krtirtho.spotube.modules.update.PluginUpdateDialog
+import dev.krtirtho.spotube.modules.update.PluginUpdateService
 import dev.krtirtho.spotube.modules.webview.WebViewScreen
 import dev.krtirtho.spotube.resources.iconsax.Iconsax
 import dev.krtirtho.spotube.resources.iconsax.IconsaxCd
@@ -69,7 +62,6 @@ import dev.krtirtho.spotube.resources.iconsax.User
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import org.koin.compose.koinInject
 import org.koin.compose.navigation3.koinEntryProvider
-import org.koin.compose.viewmodel.koinViewModel
 import org.koin.core.annotation.KoinExperimentalAPI
 
 interface NavigationItem {
@@ -143,8 +135,10 @@ fun App(
 ) {
     val settingsRepository: SettingsRepository = koinInject<SettingsRepository>()
     val userSettings by settingsRepository.userSettings.collectAsStateWithLifecycle(initialValue = UserSettings())
-    val updateCheckerViewModel: UpdateCheckerViewModel = koinViewModel()
-    val availableUpdate by updateCheckerViewModel.availableUpdate.collectAsStateWithLifecycle()
+    val appUpdateService: AppUpdateService = koinInject()
+    val pluginUpdateService: PluginUpdateService = koinInject()
+    val availableAppUpdate by appUpdateService.availableUpdate.collectAsStateWithLifecycle()
+    val availablePluginUpdate by pluginUpdateService.availableUpdate.collectAsStateWithLifecycle()
 
     val navigationState = rememberNavigationState(
         startRoute = Routes.Home, topLevelRoutes = TOP_LEVEL_ROUTES
@@ -182,42 +176,27 @@ fun App(
                 }
             }
             content()
-            if (availableUpdate != null) {
-                val update = availableUpdate!!
-                ThemedDialog(
-                    onDismissRequest = updateCheckerViewModel::dismissUpdate,
-                    title = {
-                        Text(
-                            text = "Spotube ${update.tag} is available",
-                            style = MaterialTheme.typography.titleLarge,
-                            fontWeight = FontWeight.SemiBold,
-                        )
+            availableAppUpdate?.let { update ->
+                AppUpdateDialog(
+                    update = update,
+                    onDismiss = appUpdateService::dismissUpdate,
+                    onIgnore = appUpdateService::ignoreUpdate,
+                    onUpdate = {
+                        runCatching { openUrlInBrowser("https://spotube.cc/downloads/") }
+                        appUpdateService.dismissUpdate()
                     },
-                    actions = {
-                        OutlineButton(onClick = updateCheckerViewModel::ignoreUpdate) {
-                            Text("Ignore")
-                        }
-                        PrimaryButton(
-                            onClick = {
-                                runCatching { openUrlInBrowser("https://spotube.cc/downloads/") }
-                                updateCheckerViewModel.dismissUpdate()
-                            },
-                        ) {
-                            Text("Update")
-                        }
+                )
+            }
+            availablePluginUpdate?.let { update ->
+                PluginUpdateDialog(
+                    update = update,
+                    onDismiss = pluginUpdateService::dismissUpdate,
+                    onIgnore = pluginUpdateService::ignoreUpdate,
+                    onUpdate = {
+                        runCatching { openUrlInBrowser(update.info.directDownloadUrl) }
+                        pluginUpdateService.dismissUpdate()
                     },
-                ) {
-                    if (update.releaseNotesMarkdown.isNotBlank()) {
-                        SelectionContainer {
-                            Markdown(
-                                content = update.releaseNotesMarkdown,
-                                modifier = Modifier.padding(bottom = 8.dp),
-                            )
-                        }
-                    } else {
-                        Text("See what's new in this release on the Spotube downloads page.")
-                    }
-                }
+                )
             }
         }
     }

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/core/di/Modules.kt

@@ -32,6 +32,7 @@ import dev.krtirtho.spotube.core.remote.RemoteControlClient
 import dev.krtirtho.spotube.core.remote.RemoteControlHandler
 import dev.krtirtho.spotube.core.remote.RemoteControlService
 import dev.krtirtho.spotube.core.remote.RemotePlaybackController
+import dev.krtirtho.spotube.core.scrobble.ScrobbleManager
 import dev.krtirtho.spotube.core.playback.CollectionPlaybackHelper
 import dev.krtirtho.spotube.core.server.AlternativeTracksRepository
 import dev.krtirtho.spotube.core.server.CacheManager
@@ -69,11 +70,13 @@ import dev.krtirtho.spotube.modules.plugin.AudioPluginSource
 import dev.krtirtho.spotube.modules.plugin.PluginManager
 import dev.krtirtho.spotube.modules.plugin.PluginProvider
 import dev.krtirtho.spotube.modules.plugin.PluginViewModel
+import dev.krtirtho.spotube.modules.plugin.ScrobblePluginSource
 import dev.krtirtho.spotube.modules.saved_tracks.SavedTracksRepository
 import dev.krtirtho.spotube.modules.saved_tracks.SavedTracksViewModel
 import dev.krtirtho.spotube.modules.search.SearchRepository
 import dev.krtirtho.spotube.modules.search.SearchScreenViewModel
-import dev.krtirtho.spotube.modules.update.UpdateCheckerViewModel
+import dev.krtirtho.spotube.modules.update.AppUpdateService
+import dev.krtirtho.spotube.modules.update.PluginUpdateService
 import dev.krtirtho.spotube.modules.settings.SettingsProvider
 import dev.krtirtho.spotube.modules.settings.SettingsRepository
 import dev.krtirtho.spotube.modules.settings.UserSettingsSource
@@ -129,6 +132,7 @@ val sharedModules = module {
     singleOf(::PluginManager) {
         bind<PluginProvider>()
         bind<AudioPluginSource>()
+        bind<ScrobblePluginSource>()
     }
     viewModelOf(::PluginViewModel)
 
@@ -136,7 +140,10 @@ val sharedModules = module {
     singleOf(::SettingsRepository) { bind<UserSettingsSource>() }
     viewModelOf(::SettingsViewModel) { bind<SettingsProvider>() }
     viewModelOf(::JamSettingsViewModel)
-    viewModelOf(::UpdateCheckerViewModel)
+
+    // Updates
+    single { AppUpdateService(get()) } withOptions { createdAtStart() }
+    single { PluginUpdateService(get(), get()) } withOptions { createdAtStart() }
 
     // Downloads
     singleOf(::DownloadManager)
@@ -264,6 +271,9 @@ val sharedModules = module {
 
     single { DiscordRpcService(get(), get()) } withOptions { createdAtStart() }
 
+    // Scrobbling
+    single { ScrobbleManager(get(), get(), get()) } withOptions { createdAtStart() }
+
     factory { (tag: String?) ->
         if (tag != null) {
             Logger.withTag(tag)

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/core/scrobble/ScrobbleManager.kt

@@ -0,0 +1,272 @@
+/*
+ * Copyright (C) 2026 Kingkor Roy Tirtho and Spotube Contributors
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+package dev.krtirtho.spotube.core.scrobble
+
+import dev.krtirtho.plugin_interfaces.plugin_apis.metadata.track.MetadataTrack
+import dev.krtirtho.plugin_interfaces.plugin_apis.scrobble.ScrobbleTrack
+import dev.krtirtho.spotube.core.audioplayer.AudioPlayerInterface
+import dev.krtirtho.spotube.core.audioplayer.AudioPlayerQueue
+import dev.krtirtho.spotube.core.audioplayer.PlayerState
+import dev.krtirtho.spotube.core.audioplayer.QueueEntry
+import dev.krtirtho.spotube.core.di.injectLogger
+import dev.krtirtho.spotube.modules.plugin.ScrobblePluginSource
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.IO
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.launch
+import org.koin.core.component.KoinComponent
+import kotlin.time.Clock
+
+/**
+ * Watches local playback and submits scrobbles through the currently selected scrobble plugin.
+ *
+ * Scrobbling follows the standard Last.fm rules, which plugins are expected to honour as well:
+ * - Tracks shorter than [MIN_TRACK_DURATION_MS] are never scrobbled.
+ * - The track must be listened to for at least half of its duration, or [MAX_SCROBBLE_THRESHOLD_MS],
+ *   whichever comes first.
+ *
+ * Only time during which the player is actively [PlayerState.PLAYING] is counted, so pauses are
+ * ignored, and forward seeks don't credit unheard audio. The timestamp sent with the scrobble is
+ * the moment playback of the track started. Each play is scrobbled at most once; replaying or
+ * repeating the track starts a new scrobble session.
+ */
+class ScrobbleManager(
+    private val audioPlayer: AudioPlayerInterface,
+    private val audioPlayerQueue: AudioPlayerQueue,
+    private val scrobblePluginSource: ScrobblePluginSource,
+    private val scope: CoroutineScope = CoroutineScope(SupervisorJob() + Dispatchers.IO),
+) : KoinComponent {
+
+    private val logger by injectLogger<ScrobbleManager>()
+
+    private var activeTrackKey: String? = null
+    private var playbackStartedAtEpochSeconds: Long? = null
+    private var listenedMs: Long = 0L
+    private var lastPositionMs: Long? = null
+    private var scrobbled = false
+
+    init {
+        scope.launch {
+            combine(
+                audioPlayerQueue.currentQueueEntryFlow,
+                audioPlayer.playerStateFlow,
+                audioPlayer.positionFlow,
+                audioPlayer.durationFlow,
+            ) { entry, playerState, position, duration ->
+                PlaybackSnapshot(
+                    entry = entry,
+                    playerState = playerState,
+                    positionMs = position.inWholeMilliseconds,
+                    playerDurationMs = duration.inWholeMilliseconds,
+                )
+            }.collect(::onPlaybackSnapshot)
+        }
+    }
+
+    private fun onPlaybackSnapshot(snapshot: PlaybackSnapshot) {
+        val entry = snapshot.entry
+        if (entry == null) {
+            clearSession()
+            return
+        }
+
+        val trackKey = entry.trackKey()
+        if (trackKey != activeTrackKey) {
+            beginSession(trackKey, snapshot.positionMs)
+            return
+        }
+
+        val previousPositionMs = lastPositionMs
+        lastPositionMs = snapshot.positionMs
+
+        if (snapshot.playerState != PlayerState.PLAYING) return
+        if (previousPositionMs == null) {
+            playbackStartedAtEpochSeconds = playbackStartedAtEpochSeconds ?: nowEpochSeconds()
+            return
+        }
+
+        if (playbackStartedAtEpochSeconds == null) {
+            playbackStartedAtEpochSeconds = nowEpochSeconds()
+        }
+
+        val deltaMs = snapshot.positionMs - previousPositionMs
+        if (deltaMs < 0) {
+            // A backward seek to the very beginning means the play started over
+            // (e.g. repeat one), so allow it to be scrobbled again.
+            if (snapshot.positionMs <= RESTART_POSITION_THRESHOLD_MS) {
+                restartSession(snapshot.positionMs)
+            }
+            return
+        }
+
+        // A jump larger than a couple of position ticks is a forward seek or a
+        // buffering/app-suspension stall. Never credit unplayed audio for it.
+        if (deltaMs > MAX_COUNTED_POSITION_DELTA_MS) return
+
+        listenedMs += deltaMs
+        if (scrobbled) return
+
+        val durationMs = entry.durationMs().takeIf { it > 0 } ?: snapshot.playerDurationMs
+        val thresholdMs = scrobbleThresholdMs(durationMs) ?: return
+        if (listenedMs < thresholdMs) return
+
+        if (scrobblePluginSource.selectedScrobblePlugin.value == null) {
+            // No scrobble plugin selected yet: keep the session hot so it can be
+            // submitted if the user selects one while the track is still playing.
+            return
+        }
+
+        scrobbled = true
+        val track = entry.toScrobbleTrack(
+            timestamp = playbackStartedAtEpochSeconds ?: nowEpochSeconds(),
+            durationMs = durationMs,
+        )
+        scope.launch { submitScrobble(track) }
+    }
+
+    private suspend fun submitScrobble(track: ScrobbleTrack) {
+        val plugin = scrobblePluginSource.selectedScrobblePlugin.value ?: return
+        try {
+            plugin.use { scrobbleAPI.scrobble(track) }
+            logger.d { "Scrobbled \"${track.trackName}\" by ${track.artistName} via ${plugin.pluginId}" }
+        } catch (e: CancellationException) {
+            throw e
+        } catch (e: Exception) {
+            logger.e(e) { "Failed to scrobble \"${track.trackName}\" by ${track.artistName}" }
+        }
+    }
+
+    private fun beginSession(trackKey: String, positionMs: Long) {
+        activeTrackKey = trackKey
+        restartSession(positionMs)
+    }
+
+    private fun restartSession(positionMs: Long) {
+        listenedMs = 0L
+        playbackStartedAtEpochSeconds = null
+        lastPositionMs = positionMs
+        scrobbled = false
+    }
+
+    private fun clearSession() {
+        activeTrackKey = null
+        listenedMs = 0L
+        playbackStartedAtEpochSeconds = null
+        lastPositionMs = null
+        scrobbled = false
+    }
+
+    private fun nowEpochSeconds(): Long = Clock.System.now().epochSeconds
+
+    private fun QueueEntry.trackKey(): String = when (this) {
+        is QueueEntry.StreamingTrack -> track.id
+        is QueueEntry.LocalTrack -> url
+    }
+
+    private fun QueueEntry.durationMs(): Long = when (this) {
+        is QueueEntry.StreamingTrack -> track.durationMs
+        is QueueEntry.LocalTrack -> duration
+    }
+
+    private fun QueueEntry.toScrobbleTrack(timestamp: Long, durationMs: Long): ScrobbleTrack {
+        return when (this) {
+            is QueueEntry.StreamingTrack -> ScrobbleTrack(
+                timestamp = timestamp,
+                trackId = track.id,
+                artistId = track.artists.firstOrNull()?.id.orEmpty(),
+                albumId = track.album?.id,
+                trackName = track.title,
+                artistName = track.artists.joinToString(", ") { it.name },
+                albumName = track.album?.title,
+                streamingProvider = resolveStreamingProvider(track),
+                durationMs = durationMs,
+            )
+
+            is QueueEntry.LocalTrack -> ScrobbleTrack(
+                timestamp = timestamp,
+                trackId = url,
+                artistId = "",
+                albumId = null,
+                trackName = name,
+                artistName = artists.joinToString(", "),
+                albumName = album,
+                streamingProvider = LOCAL_PROVIDER,
+                durationMs = durationMs,
+            )
+        }
+    }
+
+    /** Maps a track's external URI to the streaming provider key scrobble plugins expect. */
+    private fun resolveStreamingProvider(track: MetadataTrack): String {
+        val host = track.externalUri
+            ?.substringAfter("://", missingDelimiterValue = "")
+            ?.substringBefore('/')
+            ?.substringAfter('@')
+            ?.substringBefore(':')
+            ?.lowercase()
+            ?.removePrefix("www.")
+            .orEmpty()
+
+        if (host.isBlank()) return UNKNOWN_PROVIDER
+
+        return when {
+            "spotify" in host -> "spotify"
+            "apple" in host -> "apple_music"
+            "music.youtube" in host -> "youtube_music"
+            "youtube" in host || "youtu.be" in host -> "youtube"
+            "deezer" in host -> "deezer"
+            "tidal" in host -> "tidal"
+            "soundcloud" in host -> "soundcloud"
+            "amazon" in host -> "amazon_music"
+            "pandora" in host -> "pandora"
+            else -> host.substringBefore('.')
+        }
+    }
+
+    private data class PlaybackSnapshot(
+        val entry: QueueEntry?,
+        val playerState: PlayerState,
+        val positionMs: Long,
+        val playerDurationMs: Long,
+    )
+
+    companion object {
+        /** Tracks shorter than this are never scrobbled (Last.fm rule). */
+        private const val MIN_TRACK_DURATION_MS = 30_000L
+
+        /** Listening threshold is capped at four minutes (Last.fm rule). */
+        private const val MAX_SCROBBLE_THRESHOLD_MS = 4 * 60 * 1000L
+
+        /** Largest position delta credited as listening, covers position polling jitter. */
+        private const val MAX_COUNTED_POSITION_DELTA_MS = 2_000L
+
+        /** Positions at or below this are treated as the start of a fresh play. */
+        private const val RESTART_POSITION_THRESHOLD_MS = 5_000L
+
+        private const val UNKNOWN_PROVIDER = "unknown"
+        private const val LOCAL_PROVIDER = "local"
+
+        private fun scrobbleThresholdMs(durationMs: Long): Long? {
+            if (durationMs < MIN_TRACK_DURATION_MS) return null
+            return minOf(durationMs / 2, MAX_SCROBBLE_THRESHOLD_MS)
+        }
+    }
+}

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/core/webview/PlatformWebviewScreen.kt

@@ -215,7 +215,6 @@ fun PlatformWebViewScreen(webViewController: WebViewController) {
             webViewJsBridge = webViewBridge,
             onCreated = { webView ->
                 navigator.evaluateJavaScript(bridgeBootstrapScript)
-
             },
         )
     }

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/modules/plugin/PluginManager.kt

@@ -76,11 +76,18 @@ interface AudioPluginSource {
     val selectedAudioPlugin: StateFlow<PluginService?>
 }
 
+/** Narrow read-only view of the active scrobble plugin, used by consumers that only need
+ * to submit scrobbles against the currently selected plugin without depending on the full
+ * [PluginManager] (which also owns plugin installation/lifecycle machinery). */
+interface ScrobblePluginSource {
+    val selectedScrobblePlugin: StateFlow<PluginService?>
+}
+
 
 class PluginManager(
     val database: Database,
     val paths: Paths,
-) : KoinComponent, PluginProvider, AudioPluginSource {
+) : KoinComponent, PluginProvider, AudioPluginSource, ScrobblePluginSource {
     private val logger by injectLogger<PluginManager>()
     private val pluginExceptionHandler = CoroutineExceptionHandler { _, exception ->
         logger.e(exception) { "Plugin runtime threw an unhandled exception. Intercepted safely." }
@@ -116,7 +123,6 @@ class PluginManager(
             val json = p[DatabaseKeys.PLUGINS_STATE_KEY]
             val defaultSelectedPlugins = mapOf(
                 PluginAbility.AUDIO to NEWPIPE_YOUTUBE_BUILT_IN_PLUGIN,
-                PluginAbility.SCROBBLE to LRCLIB_BUILT_IN_PLUGIN,
             )
             if (json == null) {
                 PluginManagerStates.Data(
@@ -136,11 +142,21 @@ class PluginManager(
                         } else it
                     }.toSet()
 
-                    res.copy(
-                        plugins = (plugins union BUILT_IN_PLUGINS).toList(),
-                        selectedPlugins = res.selectedPlugins.ifEmpty {
-                            defaultSelectedPlugins
+                    val resolvedPlugins = (plugins union BUILT_IN_PLUGINS).toList()
+                    val resolvedPluginsById = resolvedPlugins.associateBy { it.id }
+                    // Drop selections for plugins that don't actually declare the ability
+                    // (e.g. a scrobble selection left over from a removed built-in plugin)
+                    // and always point selections at the resolved plugin entry.
+                    val selectedPlugins = res.selectedPlugins.ifEmpty { defaultSelectedPlugins }
+                        .mapNotNull { (ability, selected) ->
+                            val plugin = resolvedPluginsById[selected.id] ?: return@mapNotNull null
+                            if (ability in plugin.abilities) ability to plugin else null
                         }
+                        .toMap()
+
+                    res.copy(
+                        plugins = resolvedPlugins,
+                        selectedPlugins = selectedPlugins,
                     )
                 } catch (_: Exception) {
                     PluginManagerStates.Data(
@@ -256,7 +272,7 @@ class PluginManager(
         filterSelectedPluginByType(PluginAbility.AUDIO)
     val selectedLyricsPlugin =
         filterSelectedPluginByType(PluginAbility.LYRICS)
-    val selectedScrobblePlugin =
+    override val selectedScrobblePlugin =
         filterSelectedPluginByType(PluginAbility.SCROBBLE)
 
 

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/modules/settings/SettingsModels.kt

@@ -87,7 +87,8 @@ data class UserSettings(
 
     // Updates
     val autoCheckForUpdates: Boolean = true,
-    val ignoredUpdateVersion: String? = null,
+    val ignoredAppUpdateVersion: String? = null,
+    val ignoredPluginUpdateVersions: Map<String, String> = emptyMap(),
 )
 
 /**

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/modules/update/AppUpdateDialog.kt

@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2026 Kingkor Roy Tirtho and Spotube Contributors
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+package dev.krtirtho.spotube.modules.update
+
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.text.selection.SelectionContainer
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import com.mikepenz.markdown.m3.Markdown
+import dev.krtirtho.spotube.core.ui.base.OutlineButton
+import dev.krtirtho.spotube.core.ui.base.PrimaryButton
+import dev.krtirtho.spotube.core.ui.base.ThemedDialog
+import org.jetbrains.compose.resources.stringResource
+import spotube.composeapp.generated.resources.Res
+import spotube.composeapp.generated.resources.app_update_dialog_no_notes
+import spotube.composeapp.generated.resources.app_update_dialog_title
+import spotube.composeapp.generated.resources.update_action_ignore
+import spotube.composeapp.generated.resources.update_action_update
+
+/**
+ * Prompts the user that a newer Spotube release is available on GitHub. [onUpdate]
+ * should take the user to the downloads page; [onIgnore] persistently silences this
+ * specific release tag so the check moves on to the next newer one.
+ */
+@Composable
+fun AppUpdateDialog(
+    update: AvailableAppUpdate,
+    onDismiss: () -> Unit,
+    onIgnore: () -> Unit,
+    onUpdate: () -> Unit,
+) {
+    ThemedDialog(
+        onDismissRequest = onDismiss,
+        title = {
+            Text(
+                text = stringResource(Res.string.app_update_dialog_title, update.tag),
+                style = MaterialTheme.typography.titleLarge,
+                fontWeight = FontWeight.SemiBold,
+            )
+        },
+        actions = {
+            OutlineButton(onClick = onIgnore) {
+                Text(stringResource(Res.string.update_action_ignore))
+            }
+            PrimaryButton(onClick = onUpdate) {
+                Text(stringResource(Res.string.update_action_update))
+            }
+        },
+    ) {
+        if (update.releaseNotesMarkdown.isNotBlank()) {
+            SelectionContainer {
+                Markdown(
+                    content = update.releaseNotesMarkdown,
+                    modifier = Modifier.padding(bottom = 8.dp),
+                )
+            }
+        } else {
+            Text(stringResource(Res.string.app_update_dialog_no_notes))
+        }
+    }
+}

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/modules/update/AppUpdateService.kt

@@ -17,8 +17,6 @@
 
 package dev.krtirtho.spotube.modules.update
 
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
 import co.touchlab.kermit.Logger
 import dev.krtirtho.spotube.AppBuildInfo
 import dev.krtirtho.spotube.modules.settings.SettingsRepository
@@ -30,6 +28,9 @@ import io.ktor.client.request.get
 import io.ktor.client.request.header
 import io.ktor.http.HttpHeaders
 import io.ktor.serialization.kotlinx.json.json
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
@@ -38,27 +39,35 @@ import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.Json
 import net.swiftzer.semver.SemVer
+import org.koin.core.component.KoinComponent
 
-data class AvailableUpdate(
+data class AvailableAppUpdate(
     val tag: String,
     val releaseNotesMarkdown: String,
 )
 
-class UpdateCheckerViewModel(
+/**
+ * Checks GitHub for a newer app release once on startup and exposes it for the UI to
+ * surface via [dev.krtirtho.spotube.modules.update.AppUpdateDialog]. This is an
+ * app-scoped singleton (not a ViewModel) since the check runs once for the whole
+ * process, independent of any screen's lifecycle.
+ */
+class AppUpdateService(
     private val settingsRepository: SettingsRepository,
-) : ViewModel() {
-    private val logger = Logger.withTag("UpdateChecker")
+) : KoinComponent, AutoCloseable {
+    private val logger = Logger.withTag("AppUpdateService")
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
     private val httpClient = HttpClient(CIO) {
         install(ContentNegotiation) {
             json(Json { ignoreUnknownKeys = true })
         }
     }
 
-    private val _availableUpdate = MutableStateFlow<AvailableUpdate?>(null)
-    val availableUpdate: StateFlow<AvailableUpdate?> = _availableUpdate.asStateFlow()
+    private val _availableUpdate = MutableStateFlow<AvailableAppUpdate?>(null)
+    val availableUpdate: StateFlow<AvailableAppUpdate?> = _availableUpdate.asStateFlow()
 
     init {
-        viewModelScope.launch {
+        scope.launch {
             checkForUpdate()
         }
     }
@@ -80,8 +89,8 @@ class UpdateCheckerViewModel(
             val currentVersion = parseVersion(AppBuildInfo.VERSION)
                 ?: return logger.w { "Ignoring update check for invalid app version: ${AppBuildInfo.VERSION}" }
 
-            if (latestVersion > currentVersion && release.tagName != settings.ignoredUpdateVersion) {
-                _availableUpdate.value = AvailableUpdate(
+            if (latestVersion > currentVersion && release.tagName != settings.ignoredAppUpdateVersion) {
+                _availableUpdate.value = AvailableAppUpdate(
                     tag = release.tagName,
                     releaseNotesMarkdown = release.body.orEmpty(),
                 )
@@ -94,10 +103,10 @@ class UpdateCheckerViewModel(
     fun ignoreUpdate() {
         val update = _availableUpdate.value ?: return
         _availableUpdate.value = null
-        viewModelScope.launch {
+        scope.launch {
             runCatching {
                 val settings = settingsRepository.getCurrentSettings()
-                settingsRepository.updateSettings(settings.copy(ignoredUpdateVersion = update.tag))
+                settingsRepository.updateSettings(settings.copy(ignoredAppUpdateVersion = update.tag))
             }.onFailure { e ->
                 logger.e(e) { "Failed to persist ignored app version" }
             }
@@ -112,7 +121,7 @@ class UpdateCheckerViewModel(
         SemVer.parse(version)
     }.getOrNull()
 
-    override fun onCleared() {
+    override fun close() {
         httpClient.close()
     }
 }

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/modules/update/PluginUpdateDialog.kt

@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2026 Kingkor Roy Tirtho and Spotube Contributors
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+package dev.krtirtho.spotube.modules.update
+
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.text.selection.SelectionContainer
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import com.mikepenz.markdown.m3.Markdown
+import dev.krtirtho.spotube.core.ui.base.OutlineButton
+import dev.krtirtho.spotube.core.ui.base.PrimaryButton
+import dev.krtirtho.spotube.core.ui.base.ThemedDialog
+import org.jetbrains.compose.resources.stringResource
+import spotube.composeapp.generated.resources.Res
+import spotube.composeapp.generated.resources.plugin_update_dialog_current_version
+import spotube.composeapp.generated.resources.plugin_update_dialog_no_notes
+import spotube.composeapp.generated.resources.plugin_update_dialog_title
+import spotube.composeapp.generated.resources.update_action_ignore
+import spotube.composeapp.generated.resources.update_action_update
+
+/**
+ * Prompts the user that a newer version of one of their installed plugins is
+ * available. [onUpdate] should open the plugin's direct download URL; [onIgnore]
+ * persistently silences this specific plugin version so the check moves on to the
+ * next newer one (or another plugin).
+ */
+@Composable
+fun PluginUpdateDialog(
+    update: AvailablePluginUpdate,
+    onDismiss: () -> Unit,
+    onIgnore: () -> Unit,
+    onUpdate: () -> Unit,
+) {
+    ThemedDialog(
+        onDismissRequest = onDismiss,
+        title = {
+            Text(
+                text = stringResource(
+                    Res.string.plugin_update_dialog_title,
+                    update.pluginName,
+                    update.info.latestVersion,
+                ),
+                style = MaterialTheme.typography.titleLarge,
+                fontWeight = FontWeight.SemiBold,
+            )
+        },
+        actions = {
+            OutlineButton(onClick = onIgnore) {
+                Text(stringResource(Res.string.update_action_ignore))
+            }
+            PrimaryButton(onClick = onUpdate) {
+                Text(stringResource(Res.string.update_action_update))
+            }
+        },
+    ) {
+        Text(
+            text = stringResource(Res.string.plugin_update_dialog_current_version, update.currentVersion),
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(bottom = 8.dp),
+        )
+        if (update.info.releaseNotes.isNotBlank()) {
+            SelectionContainer {
+                Markdown(content = update.info.releaseNotes)
+            }
+        } else {
+            Text(stringResource(Res.string.plugin_update_dialog_no_notes))
+        }
+    }
+}

composeApp/src/commonMain/kotlin/dev/krtirtho/spotube/modules/update/PluginUpdateService.kt

@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2026 Kingkor Roy Tirtho and Spotube Contributors
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+package dev.krtirtho.spotube.modules.update
+
+import co.touchlab.kermit.Logger
+import dev.krtirtho.plugin_interfaces.plugin_apis.core.PluginUpdateInfo
+import dev.krtirtho.spotube.core.zipline.PluginService
+import dev.krtirtho.spotube.modules.plugin.PluginEntry
+import dev.krtirtho.spotube.modules.plugin.PluginManager
+import dev.krtirtho.spotube.modules.plugin.PluginManagerStates
+import dev.krtirtho.spotube.modules.settings.SettingsRepository
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.filterNotNull
+import kotlinx.coroutines.launch
+import net.swiftzer.semver.SemVer
+import org.koin.core.component.KoinComponent
+
+data class AvailablePluginUpdate(
+    val pluginId: String,
+    val pluginName: String,
+    val currentVersion: String,
+    val info: PluginUpdateInfo,
+)
+
+/**
+ * Checks the currently active plugins for updates through their own [PluginService.use]
+ * -> `coreAPI.checkPluginUpdates` API whenever the selected plugin set changes, and
+ * exposes at most one pending update at a time for the UI to surface via
+ * [dev.krtirtho.spotube.modules.update.PluginUpdateDialog]. This is an app-scoped
+ * singleton (not a ViewModel) since plugin runtimes are owned by [PluginManager]
+ * independent of any screen's lifecycle.
+ */
+class PluginUpdateService(
+    private val pluginManager: PluginManager,
+    private val settingsRepository: SettingsRepository,
+) : KoinComponent {
+    private val logger = Logger.withTag("PluginUpdateService")
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
+
+    private val _availableUpdate = MutableStateFlow<AvailablePluginUpdate?>(null)
+    val availableUpdate: StateFlow<AvailablePluginUpdate?> = _availableUpdate.asStateFlow()
+
+    init {
+        scope.launch {
+            pluginManager.ziplineServices.filterNotNull().collect { services ->
+                checkForUpdates(services.values.filterNotNull())
+            }
+        }
+    }
+
+    private suspend fun checkForUpdates(services: List<PluginService>) {
+        // Only surface one plugin update prompt at a time; re-checks happen the
+        // next time the selected plugin set changes.
+        if (_availableUpdate.value != null) return
+
+        val settings = settingsRepository.getCurrentSettings()
+        if (!settings.autoCheckForUpdates) return
+
+        for (service in services.distinctBy { it.pluginId }) {
+            val pluginEntry = findPluginEntry(service.pluginId) ?: continue
+            val currentVersion = parseVersion(pluginEntry.version) ?: continue
+
+            try {
+                val updateInfo = service.use { coreAPI.checkPluginUpdates(currentVersion) } ?: continue
+                val latestVersion = parseVersion(updateInfo.latestVersion)
+                if (latestVersion == null) {
+                    logger.w { "Ignoring plugin update with invalid SemVer: ${updateInfo.latestVersion}" }
+                    continue
+                }
+
+                val ignoredVersion = settings.ignoredPluginUpdateVersions[pluginEntry.id]
+                if (latestVersion > currentVersion && updateInfo.latestVersion != ignoredVersion) {
+                    _availableUpdate.value = AvailablePluginUpdate(
+                        pluginId = pluginEntry.id,
+                        pluginName = pluginEntry.name,
+                        currentVersion = pluginEntry.version,
+                        info = updateInfo,
+                    )
+                    return
+                }
+            } catch (e: Exception) {
+                logger.w(e) { "Failed to check updates for plugin ${pluginEntry.name}" }
+            }
+        }
+    }
+
+    private fun findPluginEntry(pluginId: String): PluginEntry? {
+        val state = pluginManager.state.value as? PluginManagerStates.Data ?: return null
+        return state.plugins.find { it.id == pluginId }
+    }
+
+    fun ignoreUpdate() {
+        val update = _availableUpdate.value ?: return
+        _availableUpdate.value = null
+        scope.launch {
+            runCatching {
+                val settings = settingsRepository.getCurrentSettings()
+                settingsRepository.updateSettings(
+                    settings.copy(
+                        ignoredPluginUpdateVersions = settings.ignoredPluginUpdateVersions +
+                            (update.pluginId to update.info.latestVersion)
+                    )
+                )
+            }.onFailure { e ->
+                logger.e(e) { "Failed to persist ignored plugin update version" }
+            }
+        }
+    }
+
+    fun dismissUpdate() {
+        _availableUpdate.value = null
+    }
+
+    private fun parseVersion(version: String): SemVer? = runCatching {
+        SemVer.parse(version)
+    }.getOrNull()
+}

composeApp/src/commonTest/kotlin/dev/krtirtho/spotube/core/audioplayer/FakeAudioPlayer.kt

@@ -9,10 +9,13 @@ import kotlin.time.Duration
 class FakeAudioPlayer : AudioPlayerInterface {
     private val _playlistFlow = MutableStateFlow<List<MediaItem>>(emptyList())
     override val playlistFlow: StateFlow<List<MediaItem>> = _playlistFlow.asStateFlow()
-    override val durationFlow: StateFlow<Duration>
-        get() = TODO("Not yet implemented")
-    override val positionFlow: StateFlow<Duration>
-        get() = TODO("Not yet implemented")
+
+    private val _durationFlow = MutableStateFlow(Duration.ZERO)
+    override val durationFlow: StateFlow<Duration> = _durationFlow.asStateFlow()
+
+    private val _positionFlow = MutableStateFlow(Duration.ZERO)
+    override val positionFlow: StateFlow<Duration> = _positionFlow.asStateFlow()
+
     override val bufferingPositionFlow: StateFlow<Duration>
         get() = TODO("Not yet implemented")
 
@@ -152,8 +155,8 @@ class FakeAudioPlayer : AudioPlayerInterface {
         _currentMediaItemFlow.value = _playlistFlow.value.getOrNull(index)
     }
 
-    override val playerStateFlow: StateFlow<PlayerState>
-        get() = TODO("Not yet implemented")
+    private val _playerStateFlow = MutableStateFlow(PlayerState.IDLE)
+    override val playerStateFlow: StateFlow<PlayerState> = _playerStateFlow.asStateFlow()
 
     fun setPlaylist(items: List<MediaItem>) {
         _playlistFlow.value = items
@@ -167,6 +170,18 @@ class FakeAudioPlayer : AudioPlayerInterface {
         _loopStateFlow.value = state
     }
 
+    fun setPlayerState(state: PlayerState) {
+        _playerStateFlow.value = state
+    }
+
+    fun setPosition(position: Duration) {
+        _positionFlow.value = position
+    }
+
+    fun setDuration(duration: Duration) {
+        _durationFlow.value = duration
+    }
+
     fun resetCallCounts() {
         loadCallCount = 0
         playCallCount = 0

composeApp/src/commonTest/kotlin/dev/krtirtho/spotube/core/scrobble/ScrobbleManagerTest.kt

@@ -0,0 +1,408 @@
+package dev.krtirtho.spotube.core.scrobble
+
+import co.touchlab.kermit.Logger
+import dev.krtirtho.plugin_interfaces.plugin_apis.metadata.album.MetadataAlbum
+import dev.krtirtho.plugin_interfaces.plugin_apis.metadata.album.MetadataAlbumType
+import dev.krtirtho.plugin_interfaces.plugin_apis.metadata.artist.MetadataArtist
+import dev.krtirtho.plugin_interfaces.plugin_apis.metadata.track.MetadataTrack
+import dev.krtirtho.plugin_interfaces.plugin_apis.scrobble.ScrobbleAPI
+import dev.krtirtho.plugin_interfaces.plugin_apis.scrobble.ScrobbleTrack
+import dev.krtirtho.spotube.core.audioplayer.AudioPlayerQueue
+import dev.krtirtho.spotube.core.audioplayer.FakeAudioPlayer
+import dev.krtirtho.spotube.core.audioplayer.PlayerState
+import dev.krtirtho.spotube.core.audioplayer.QueueCollectionEntry
+import dev.krtirtho.spotube.core.audioplayer.QueueEntry
+import dev.krtirtho.spotube.core.zipline.PluginService
+import dev.krtirtho.spotube.core.zipline.PluginServiceScope
+import dev.krtirtho.spotube.modules.plugin.ScrobblePluginSource
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.test.TestScope
+import kotlinx.coroutines.test.UnconfinedTestDispatcher
+import kotlinx.coroutines.test.runTest
+import org.koin.core.context.startKoin
+import org.koin.core.context.stopKoin
+import org.koin.dsl.module
+import kotlin.test.AfterTest
+import kotlin.test.BeforeTest
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+import kotlin.time.Duration.Companion.milliseconds
+import kotlin.time.Duration.Companion.seconds
+
+@OptIn(ExperimentalCoroutinesApi::class)
+class ScrobbleManagerTest {
+
+    private lateinit var player: FakeAudioPlayer
+    private lateinit var queue: FakeQueue
+    private lateinit var plugin: FakeScrobblePluginService
+    private lateinit var pluginSource: FakeScrobblePluginSource
+
+    /** Virtual playback position advanced by [playSeconds]; mirrors a real player clock. */
+    private var currentPositionMs = 0L
+
+    @BeforeTest
+    fun setup() {
+        startKoin {
+            modules(module {
+                factory { (tag: String?) -> Logger.withTag(tag ?: "test") }
+            })
+        }
+        player = FakeAudioPlayer()
+        queue = FakeQueue()
+        plugin = FakeScrobblePluginService()
+        pluginSource = FakeScrobblePluginSource(plugin)
+        currentPositionMs = 0L
+    }
+
+    @AfterTest
+    fun teardown() {
+        stopKoin()
+    }
+
+    private fun TestScope.createManager(): ScrobbleManager {
+        return ScrobbleManager(
+            audioPlayer = player,
+            audioPlayerQueue = queue,
+            scrobblePluginSource = pluginSource,
+            scope = CoroutineScope(backgroundScope.coroutineContext + UnconfinedTestDispatcher(testScheduler)),
+        )
+    }
+
+    private fun playSeconds(seconds: Int) {
+        repeat(seconds) {
+            currentPositionMs += 1_000
+            player.setPosition(currentPositionMs.milliseconds)
+        }
+    }
+
+    @Test
+    fun `scrobbles once half of the track has been played`() = runTest {
+        createManager()
+        queue.setCurrentEntry(
+            streamingEntry(
+                id = "t1",
+                durationMs = 200_000,
+                externalUri = "https://open.spotify.com/track/t1",
+            )
+        )
+        player.setPlayerState(PlayerState.PLAYING)
+        player.setDuration(200.seconds)
+
+        playSeconds(99)
+        assertEquals(0, plugin.scrobbled.size)
+
+        playSeconds(1)
+        assertEquals(1, plugin.scrobbled.size)
+
+        val scrobble = plugin.scrobbled.single()
+        assertEquals("t1", scrobble.trackId)
+        assertEquals("artist-t1", scrobble.artistId)
+        assertEquals("album-t1", scrobble.albumId)
+        assertEquals("Track t1", scrobble.trackName)
+        assertEquals("Artist t1", scrobble.artistName)
+        assertEquals("Album t1", scrobble.albumName)
+        assertEquals("spotify", scrobble.streamingProvider)
+        assertEquals(200_000L, scrobble.durationMs)
+        assertTrue(scrobble.timestamp > 0)
+    }
+
+    @Test
+    fun `does not scrobble tracks shorter than 30 seconds`() = runTest {
+        createManager()
+        queue.setCurrentEntry(streamingEntry(id = "short", durationMs = 20_000))
+        player.setPlayerState(PlayerState.PLAYING)
+
+        playSeconds(20)
+
+        assertEquals(0, plugin.scrobbled.size)
+    }
+
+    @Test
+    fun `caps the listening threshold at four minutes`() = runTest {
+        createManager()
+        queue.setCurrentEntry(streamingEntry(id = "long", durationMs = 1_800_000))
+        player.setPlayerState(PlayerState.PLAYING)
+
+        playSeconds(239)
+        assertEquals(0, plugin.scrobbled.size)
+
+        playSeconds(1)
+        assertEquals(1, plugin.scrobbled.size)
+    }
+
+    @Test
+    fun `only scrobbles a track once per play`() = runTest {
+        createManager()
+        queue.setCurrentEntry(streamingEntry(id = "t1", durationMs = 40_000))
+        player.setPlayerState(PlayerState.PLAYING)
+
+        playSeconds(20)
+        playSeconds(15)
+
+        assertEquals(1, plugin.scrobbled.size)
+    }
+
+    @Test
+    fun `does not credit forward seeks`() = runTest {
+        createManager()
+        queue.setCurrentEntry(streamingEntry(id = "t1", durationMs = 100_000))
+        player.setPlayerState(PlayerState.PLAYING)
+
+        playSeconds(10)
+        currentPositionMs = 60_000
+        player.setPosition(currentPositionMs.milliseconds)
+
+        playSeconds(39)
+        assertEquals(0, plugin.scrobbled.size)
+
+        playSeconds(1)
+        assertEquals(1, plugin.scrobbled.size)
+    }
+
+    @Test
+    fun `does not credit time while paused`() = runTest {
+        createManager()
+        queue.setCurrentEntry(streamingEntry(id = "t1", durationMs = 100_000))
+        player.setPlayerState(PlayerState.PLAYING)
+
+        playSeconds(30)
+
+        player.setPlayerState(PlayerState.PAUSED)
+        currentPositionMs = 80_000
+        player.setPosition(currentPositionMs.milliseconds)
+
+        player.setPlayerState(PlayerState.PLAYING)
+        playSeconds(19)
+        assertEquals(0, plugin.scrobbled.size)
+
+        playSeconds(1)
+        assertEquals(1, plugin.scrobbled.size)
+    }
+
+    @Test
+    fun `restarting the track allows scrobbling it again`() = runTest {
+        createManager()
+        queue.setCurrentEntry(streamingEntry(id = "t1", durationMs = 40_000))
+        player.setPlayerState(PlayerState.PLAYING)
+
+        playSeconds(20)
+        assertEquals(1, plugin.scrobbled.size)
+
+        // Repeat-one restarts playback from the beginning without a queue entry change.
+        currentPositionMs = 0
+        player.setPosition(0.milliseconds)
+        playSeconds(20)
+
+        assertEquals(2, plugin.scrobbled.size)
+    }
+
+    @Test
+    fun `switching tracks starts a fresh scrobble session`() = runTest {
+        createManager()
+        queue.setCurrentEntry(streamingEntry(id = "t1", durationMs = 40_000))
+        player.setPlayerState(PlayerState.PLAYING)
+
+        playSeconds(20)
+        assertEquals(1, plugin.scrobbled.size)
+
+        queue.setCurrentEntry(streamingEntry(id = "t2", durationMs = 40_000))
+        currentPositionMs = 0
+        player.setPosition(0.milliseconds)
+        playSeconds(20)
+
+        assertEquals(2, plugin.scrobbled.size)
+        assertEquals("t2", plugin.scrobbled.last().trackId)
+    }
+
+    @Test
+    fun `waits for a scrobble plugin to be selected`() = runTest {
+        pluginSource.setPlugin(null)
+        createManager()
+        queue.setCurrentEntry(streamingEntry(id = "t1", durationMs = 40_000))
+        player.setPlayerState(PlayerState.PLAYING)
+
+        playSeconds(25)
+        assertEquals(0, plugin.scrobbled.size)
+
+        pluginSource.setPlugin(plugin)
+        playSeconds(1)
+
+        assertEquals(1, plugin.scrobbled.size)
+    }
+
+    @Test
+    fun `scrobbles local tracks`() = runTest {
+        createManager()
+        queue.setCurrentEntry(
+            localEntry(
+                name = "Local Song",
+                url = "file:///music/local.mp3",
+                duration = 100_000,
+            )
+        )
+        player.setPlayerState(PlayerState.PLAYING)
+
+        playSeconds(50)
+
+        val scrobble = plugin.scrobbled.single()
+        assertEquals("file:///music/local.mp3", scrobble.trackId)
+        assertEquals("Local Song", scrobble.trackName)
+        assertEquals("Local Artist", scrobble.artistName)
+        assertEquals("Local Album", scrobble.albumName)
+        assertEquals("local", scrobble.streamingProvider)
+        assertEquals(100_000L, scrobble.durationMs)
+    }
+
+    @Test
+    fun `uses unknown provider when the track has no external uri`() = runTest {
+        createManager()
+        queue.setCurrentEntry(streamingEntry(id = "t1", durationMs = 40_000, externalUri = null))
+        player.setPlayerState(PlayerState.PLAYING)
+
+        playSeconds(20)
+
+        assertEquals("unknown", plugin.scrobbled.single().streamingProvider)
+    }
+
+    // --- fixtures ---
+
+    private fun streamingTrack(
+        id: String,
+        durationMs: Long = 200_000,
+        externalUri: String? = null,
+    ): MetadataTrack {
+        val artist = MetadataArtist.Basic(
+            id = "artist-$id",
+            name = "Artist $id",
+            thumbnails = emptyList(),
+            externalUri = null,
+        )
+        val album = MetadataAlbum.Detailed(
+            releaseDate = "2024",
+            genres = emptyList(),
+            trackCount = 1,
+            id = "album-$id",
+            title = "Album $id",
+            description = null,
+            thumbnails = emptyList(),
+            albumType = MetadataAlbumType.Album,
+            artists = listOf(artist),
+            externalUri = null,
+        )
+        return MetadataTrack(
+            id = id,
+            title = "Track $id",
+            durationMs = durationMs,
+            trackNumber = 1,
+            discNumber = 1,
+            artists = listOf(artist),
+            album = album,
+            thumbnails = null,
+            explicit = false,
+            popularity = null,
+            isrcCode = null,
+            externalUri = externalUri,
+        )
+    }
+
+    private fun streamingEntry(
+        id: String,
+        durationMs: Long = 200_000,
+        externalUri: String? = null,
+    ): QueueEntry.StreamingTrack {
+        return QueueEntry.StreamingTrack(
+            track = streamingTrack(id, durationMs, externalUri),
+            url = "http://127.0.0.1:14769/stream/$id",
+        )
+    }
+
+    private fun localEntry(
+        name: String = "Local Track",
+        url: String = "file:///music/local.mp3",
+        duration: Long = 180_000,
+    ): QueueEntry.LocalTrack {
+        return QueueEntry.LocalTrack(
+            name = name,
+            artists = listOf("Local Artist"),
+            duration = duration,
+            album = "Local Album",
+            coverBytes = null,
+            url = url,
+        )
+    }
+
+    private class FakeQueue : AudioPlayerQueue {
+        private val queueState = MutableStateFlow<List<QueueEntry>>(emptyList())
+        private val currentEntryState = MutableStateFlow<QueueEntry?>(null)
+
+        override val queueFlow: StateFlow<List<QueueEntry>> = queueState
+        override val currentQueueEntryFlow: StateFlow<QueueEntry?> = currentEntryState
+        override val currentCollectionEntryFlow: StateFlow<QueueCollectionEntry?> =
+            MutableStateFlow(null)
+        override val collectionHistoryFlow: StateFlow<List<QueueCollectionEntry>> =
+            MutableStateFlow(emptyList())
+
+        fun setCurrentEntry(entry: QueueEntry?) {
+            currentEntryState.value = entry
+        }
+
+        override suspend fun load(
+            entries: List<QueueEntry>,
+            autoPlay: Boolean,
+            startPosition: Int,
+            collectionEntry: QueueCollectionEntry?,
+        ) = error("not used")
+
+        override suspend fun addToQueue(entry: QueueEntry) = error("not used")
+        override suspend fun addAllToQueue(
+            entries: List<QueueEntry>,
+            collectionEntry: QueueCollectionEntry?,
+        ) = error("not used")
+
+        override suspend fun addAllAfterCurrent(entries: List<QueueEntry>) = error("not used")
+        override suspend fun removeFromQueue(entry: QueueEntry) = error("not used")
+        override suspend fun removeFromQueueByMediaUrl(mediaUrl: String) = error("not used")
+        override suspend fun move(fromIndex: Int, toIndex: Int) = error("not used")
+        override suspend fun jumpTo(index: Int, autoPlay: Boolean) = error("not used")
+        override suspend fun reloadCurrent() = error("not used")
+        override suspend fun clear() = error("not used")
+        override suspend fun getQueue(): List<QueueEntry> = queueState.value
+        override suspend fun getCurrentQueueEntry(): QueueEntry? = currentEntryState.value
+        override suspend fun getCurrentCollectionEntry(): QueueCollectionEntry? = null
+        override suspend fun getCollectionHistory(): List<QueueCollectionEntry> = emptyList()
+    }
+
+    private class FakeScrobblePluginSource(
+        initialPlugin: PluginService? = null,
+    ) : ScrobblePluginSource {
+        private val selected = MutableStateFlow(initialPlugin)
+        override val selectedScrobblePlugin: StateFlow<PluginService?> = selected
+
+        fun setPlugin(service: PluginService?) {
+            selected.value = service
+        }
+    }
+
+    private class FakeScrobblePluginService : PluginService {
+        val scrobbled = mutableListOf<ScrobbleTrack>()
+        override val pluginId: String = "fake-scrobble-plugin"
+        override val loggedInFlow: StateFlow<Boolean> = MutableStateFlow(true)
+
+        override suspend fun start() = Unit
+        override suspend fun stop() = Unit
+
+        override suspend fun <T> use(block: suspend PluginServiceScope.() -> T): T {
+            val api = object : ScrobbleAPI {
+                override suspend fun scrobble(track: ScrobbleTrack) {
+                    scrobbled.add(track)
+                }
+            }
+            val scope = PluginServiceScope(mapOf(ScrobbleAPI::class to api))
+            return scope.block()
+        }
+    }
+}

composeApp/src/jvmMain/kotlin/dev/krtirtho/spotube/main.kt

@@ -58,52 +58,9 @@ private object KoinServicesProvider : KoinComponent {
     val settingsProvider: SettingsProvider get() = get()
 }
 
-private interface LibC : Library {
-    fun setenv(name: String, value: String, overwrite: Int): Int
-
-    companion object {
-        val INSTANCE: LibC = Native.load("c", LibC::class.java)
-    }
-}
-
-/**
- * WebKitGTK is only used on Linux (Windows = WebView2, macOS = WKWebView).
- * The webview is created *after* the window is already mapped and the Tao
- * render/swap loop is running. WebKitGTK's accelerated-compositing path then
- * initialises its own GL context in-process, racing Tao's swap thread on the
- * same Mesa display, which deterministically segfaults `libgallium` on the
- * next Compose flush. Disabling WebKit's hardware-accelerated compositing
- * (and its DMABUF renderer) removes that GL context entirely — login pages
- * render fine in software. Must run before libwebkit2gtk is loaded.
- */
-private fun disableWebKitGpuCompositing() {
-    if (!System.getProperty("os.name").lowercase().contains("linux")) return
-    LibC.INSTANCE.setenv("WEBKIT_DISABLE_COMPOSITING_MODE", "1", 1)
-    LibC.INSTANCE.setenv("WEBKIT_DISABLE_DMABUF_RENDERER", "1", 1)
-}
-
-/**
- * Routes `spotube://` deep links into [ExternalUriHandler].
- * macOS delivers them through the open-URI handler; on Linux/Windows they arrive
- * as command line arguments (scheme registration is handled by the distribution
- * packaging, e.g. the `.desktop` file's `Exec %u`).
- */
-private fun handleStartupDeepLinks(args: Array<String>) {
-    runCatching {
-        if (java.awt.Desktop.isDesktopSupported()) {
-            java.awt.Desktop.getDesktop().setOpenURIHandler { event ->
-                ExternalUriHandler.onNewUri(event.uri.toString())
-            }
-        }
-    }
-    args.firstOrNull { it.startsWith("spotube:", ignoreCase = true) }
-        ?.let(ExternalUriHandler::onNewUri)
-}
 
 @OptIn(ExperimentalComposeUiApi::class)
-fun main(args: Array<String>) {
-    disableWebKitGpuCompositing()
-    handleStartupDeepLinks(args)
+fun main() {
     FileKit.init(appId = "dev.krtirtho.spotube")
     initKoin()
     NewPipeDownloader.init(KoinPathsProvider.paths)

gradle/gradle-daemon-jvm.properties

@@ -26,5 +26,4 @@ toolchainUrl.UNIX.AARCH64=https\://api.foojay.io/disco/v3.0/ids/402983f310a88ac6
 toolchainUrl.UNIX.X86_64=https\://api.foojay.io/disco/v3.0/ids/e50b80b5a11d194a898bc3e6211b7c4b/redirect
 toolchainUrl.WINDOWS.AARCH64=https\://api.foojay.io/disco/v3.0/ids/476d3c08f4989328dee56d22e202d98d/redirect
 toolchainUrl.WINDOWS.X86_64=https\://api.foojay.io/disco/v3.0/ids/5a88b04b5e582b332d2e6bc12b45f1b9/redirect
-toolchainVendor=JETBRAINS
 toolchainVersion=21

gradle/libs.versions.toml

@@ -50,7 +50,7 @@ multiplatformMarkdownRenderer = "0.45.0"
 murmurhash = "0.4.2"
 newpipeextractor = "v0.26.5"
 newpipeExtractorKmp = "1.3.0"
-nucleusNucleusApplication = "2.4.6"
+nucleusNucleusApplication = "2.5.18"
 semver = "2.1.0"
 vlcj = "4.12.1"
 vlcjNative = "4.12.0"
@@ -61,8 +61,8 @@ kotlinStdlib = "2.4.10"
 runner = "1.7.0"
 core = "1.7.0"
 filekit = "0.14.2"
-compose-webview = "1.0.1"
-composeNativeTray = "2.0.3"
+compose-webview = "0.1.0-SNAPSHOT"
+composeNativeTray = "2.1.6"
 koin = "4.2.2"
 multiplatform-nav3-ui = "1.1.1"
 compose-multiplatform-adaptive = "1.3.0-alpha05"