feat(connectivity): add offline resilience with server reachability checks

app/src/main/java/hu/bbara/purefin/ui/screen/AppScreen.kt

@@ -13,11 +13,11 @@ import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
-import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.LifecycleResumeEffect
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.navigation3.runtime.NavBackStack
 import androidx.navigation3.runtime.NavKey
 import androidx.navigation3.runtime.entryProvider
@@ -46,6 +46,7 @@ fun AppScreen(
     val nextUp by viewModel.nextUp.collectAsStateWithLifecycle()
     val isRefreshing by viewModel.isRefreshing.collectAsStateWithLifecycle()
     val isOnline by viewModel.isOnline.collectAsStateWithLifecycle()
+    val isCheckingConnection by viewModel.isCheckingConnection.collectAsStateWithLifecycle()
     val isCheckingForUpdates by updateViewModel.isCheckingForUpdates.collectAsStateWithLifecycle()
     val availableUpdate by updateViewModel.availableUpdate.collectAsStateWithLifecycle()
     val navigationManager = LocalNavigationManager.current
@@ -133,6 +134,8 @@ fun AppScreen(
             DownloadsScreen(
                 selectedTab = selectedTab,
                 isOnline = isOnline,
+                isCheckingConnection = isCheckingConnection,
+                onCheckConnection = viewModel::checkConnection,
                 onTabSelected = onTabSelected,
                 modifier = Modifier.fillMaxSize()
             )

app/src/main/java/hu/bbara/purefin/ui/screen/download/DownloadsScreen.kt

@@ -10,12 +10,15 @@ import androidx.compose.ui.Modifier
 import hu.bbara.purefin.ui.screen.AppBottomBar
 import hu.bbara.purefin.ui.screen.download.components.DownloadsContent
 import hu.bbara.purefin.ui.screen.home.components.DefaultTopBar
+import hu.bbara.purefin.ui.screen.home.components.DefaultTopBarTextButton
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun DownloadsScreen(
     selectedTab: Int,
     isOnline: Boolean,
+    isCheckingConnection: Boolean,
+    onCheckConnection: () -> Unit,
     onTabSelected: (Int) -> Unit,
     modifier: Modifier = Modifier
 ) {
@@ -23,7 +26,19 @@ fun DownloadsScreen(
         modifier = modifier.fillMaxSize(),
         containerColor = MaterialTheme.colorScheme.background,
         contentColor = MaterialTheme.colorScheme.onBackground,
-        topBar = { DefaultTopBar() },
+        topBar = {
+            DefaultTopBar(
+                rightActions = {
+                    if (!isOnline) {
+                        DefaultTopBarTextButton(
+                            text = if (isCheckingConnection) "Checking…" else "Check connection",
+                            onClick = onCheckConnection,
+                            enabled = !isCheckingConnection
+                        )
+                    }
+                }
+            )
+        },
         bottomBar = {
             AppBottomBar(
                 selectedTab = selectedTab,

app/src/main/java/hu/bbara/purefin/ui/screen/download/components/DownloadsContent.kt

@@ -5,14 +5,17 @@ import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.widthIn
 import androidx.compose.foundation.lazy.grid.GridCells
 import androidx.compose.foundation.lazy.grid.GridItemSpan
 import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
 import androidx.compose.foundation.lazy.grid.items
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.Download
+import androidx.compose.material3.Card
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text

app/src/main/java/hu/bbara/purefin/ui/screen/home/components/DefaultTopBar.kt

@@ -5,18 +5,23 @@ import androidx.compose.animation.SharedTransitionScope
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.RowScope
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.Search
+import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.IconButtonColors
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.material3.TopAppBarScrollBehavior
@@ -114,6 +119,37 @@ fun DefaultTopBarIconButton(
     }
 }
 
+@Composable
+fun DefaultTopBarTextButton(
+    text: String,
+    onClick: () -> Unit,
+    modifier: Modifier = Modifier,
+    enabled: Boolean = true,
+) {
+    val scheme = MaterialTheme.colorScheme
+
+    TextButton(
+        onClick = onClick,
+        enabled = enabled,
+        shape = CircleShape,
+        colors = ButtonDefaults.textButtonColors(
+            containerColor = scheme.surface,
+            contentColor = scheme.onSurface,
+            disabledContainerColor = scheme.surface,
+            disabledContentColor = scheme.onSurface
+        ),
+        contentPadding = PaddingValues(horizontal = 18.dp),
+        modifier = modifier
+            .height(50.dp)
+            .clip(CircleShape),
+    ) {
+        Text(
+            text = text,
+            style = MaterialTheme.typography.labelLarge,
+        )
+    }
+}
+
 @OptIn(ExperimentalSharedTransitionApi::class)
 @Composable
 fun DefaultTopBarSearchButton(

core/src/main/java/hu/bbara/purefin/core/data/CompositeLocalMediaRepository.kt

@@ -9,12 +9,13 @@ import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.SharingStarted.Companion.Eagerly
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.flatMapLatest
-import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import java.util.UUID
 import javax.inject.Inject
@@ -25,12 +26,13 @@ import javax.inject.Singleton
 class CompositeLocalMediaRepository @Inject constructor(
     @Offline private val offlineRepository: LocalMediaRepository,
     @Online private val onlineRepository: LocalMediaRepository,
+    private val networkMonitor: NetworkMonitor,
 ) : LocalMediaRepository {
 
     private val scope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
 
-    // TODO move this into the domain layer and there you can use NetworkMonitor. Data should be free of android stuff.
+    private val activeRepository: Flow<LocalMediaRepository> = networkMonitor.isOnline
-    private val activeRepository: Flow<LocalMediaRepository> = flowOf(onlineRepository)
+        .map { isOnline -> if (isOnline) onlineRepository else offlineRepository }
 
     override val movies: StateFlow<Map<UUID, Movie>> = activeRepository
         .flatMapLatest { it.movies }
@@ -45,40 +47,111 @@ class CompositeLocalMediaRepository @Inject constructor(
         .stateIn(scope, Eagerly, emptyMap())
 
     override suspend fun getMovie(id: UUID): Flow<Movie?> {
-        return activeRepository
+        return getFromActiveRepository(
-            .flatMapLatest { it.getMovie(id) }
+            onlineRead = { onlineRepository.getMovie(id) },
+            offlineRead = { offlineRepository.getMovie(id) },
+        )
     }
 
     override suspend fun getSeries(id: UUID): Flow<Series?> {
-        return activeRepository
+        return getFromActiveRepository(
-            .flatMapLatest { it.getSeries(id) }
+            onlineRead = { onlineRepository.getSeries(id) },
+            offlineRead = { offlineRepository.getSeries(id) },
+        )
     }
 
     override suspend fun getEpisode(id: UUID): Flow<Episode?> {
-        return activeRepository
+        return getFromActiveRepository(
-            .flatMapLatest { it.getEpisode(id) }
+            onlineRead = { onlineRepository.getEpisode(id) },
+            offlineRead = { offlineRepository.getEpisode(id) },
+        )
     }
 
     override suspend fun loadSeasons(seriesId: UUID) {
-        activeRepository.first().loadSeasons(seriesId)
+        runOnlineOrOfflineNoOp(
+            onlineAction = { onlineRepository.loadSeasons(seriesId) },
+            offlineAction = { offlineRepository.loadSeasons(seriesId) },
+        )
     }
 
     override suspend fun loadSeasonEpisodes(seriesId: UUID, seasonId: UUID) {
-        activeRepository.first().loadSeasonEpisodes(seriesId, seasonId)
+        runOnlineOrOfflineNoOp(
+            onlineAction = { onlineRepository.loadSeasonEpisodes(seriesId, seasonId) },
+            offlineAction = { offlineRepository.loadSeasonEpisodes(seriesId, seasonId) },
+        )
     }
 
     override suspend fun updateWatchProgress(mediaId: UUID, positionMs: Long, durationMs: Long) {
-        onlineRepository.updateWatchProgress(mediaId, positionMs, durationMs)
+        if (networkMonitor.isOnline.first()) {
+            runOnlineAction { onlineRepository.updateWatchProgress(mediaId, positionMs, durationMs) }
+        }
         offlineRepository.updateWatchProgress(mediaId, positionMs, durationMs)
     }
 
     override suspend fun updateWatchProgressPercent(mediaId: UUID, progressPercent: Double) {
-        onlineRepository.updateWatchProgressPercent(mediaId, progressPercent)
+        if (networkMonitor.isOnline.first()) {
+            runOnlineAction { onlineRepository.updateWatchProgressPercent(mediaId, progressPercent) }
+        }
         offlineRepository.updateWatchProgressPercent(mediaId, progressPercent)
     }
 
     override suspend fun markAsWatched(mediaId: UUID, watched: Boolean) {
-        val repository = onlineRepository
+        runOnlineOrOfflineNoOp(
-        repository.markAsWatched(mediaId, watched)
+            onlineAction = { onlineRepository.markAsWatched(mediaId, watched) },
+            offlineAction = { offlineRepository.markAsWatched(mediaId, watched) },
+        )
+    }
+
+    private suspend fun <T> getFromActiveRepository(
+        onlineRead: suspend () -> Flow<T>,
+        offlineRead: suspend () -> Flow<T>,
+    ): Flow<T> {
+        if (!networkMonitor.isOnline.first()) {
+            return offlineRead()
+        }
+        return try {
+            onlineRead()
+        } catch (error: CancellationException) {
+            throw error
+        } catch (error: Exception) {
+            if (!networkMonitor.checkConnection()) {
+                offlineRead()
+            } else {
+                throw error
+            }
+        }
+    }
+
+    private suspend fun runOnlineOrOfflineNoOp(
+        onlineAction: suspend () -> Unit,
+        offlineAction: suspend () -> Unit,
+    ) {
+        if (!networkMonitor.isOnline.first()) {
+            offlineAction()
+            return
+        }
+        try {
+            onlineAction()
+        } catch (error: CancellationException) {
+            throw error
+        } catch (error: Exception) {
+            if (!networkMonitor.checkConnection()) {
+                offlineAction()
+            } else {
+                throw error
+            }
+        }
+    }
+
+    private suspend fun runOnlineAction(action: suspend () -> Unit) {
+        try {
+            action()
+        } catch (error: CancellationException) {
+            throw error
+        } catch (error: Exception) {
+            if (networkMonitor.checkConnection()) {
+                throw error
+            }
+        }
     }
 }

core/src/main/java/hu/bbara/purefin/core/data/NetworkMonitor.kt

@@ -4,4 +4,5 @@ import kotlinx.coroutines.flow.Flow
 
 interface NetworkMonitor {
     val isOnline: Flow<Boolean>
+    suspend fun checkConnection(): Boolean
 }

core/src/main/java/hu/bbara/purefin/core/feature/browse/home/AppViewModel.kt

@@ -43,17 +43,20 @@ class AppViewModel @Inject constructor(
     private val navigationManager: NavigationManager,
     private val homeRefreshCoordinator: HomeRefreshCoordinator,
     private val settingsRepository: SettingsRepository,
-    networkMonitor: NetworkMonitor,
+    private val networkMonitor: NetworkMonitor,
 ) : ViewModel() {
 
     private val _isRefreshing = MutableStateFlow(false)
     val isRefreshing: StateFlow<Boolean> = _isRefreshing.asStateFlow()
 
+    private val _isCheckingConnection = MutableStateFlow(false)
+    val isCheckingConnection: StateFlow<Boolean> = _isCheckingConnection.asStateFlow()
+
     val isOnline: StateFlow<Boolean> = networkMonitor.isOnline
         .stateIn(
             viewModelScope,
             SharingStarted.Eagerly,
-            false
+            true
         )
 
     val serverUrl: StateFlow<String> = userSessionRepository.serverUrl
@@ -253,18 +256,34 @@ class AppViewModel @Inject constructor(
 
     fun onResumed() {
         viewModelScope.launch {
+            networkMonitor.checkConnection()
             homeRefreshCoordinator.onResumed()
         }
     }
 
     fun onRefresh() {
         viewModelScope.launch {
+            networkMonitor.checkConnection()
             homeRefreshCoordinator.onRefresh { isRefreshing ->
                 _isRefreshing.value = isRefreshing
             }
         }
     }
 
+    fun checkConnection() {
+        viewModelScope.launch {
+            if (_isCheckingConnection.value) return@launch
+            _isCheckingConnection.value = true
+            val isConnected = networkMonitor.checkConnection()
+            _isCheckingConnection.value = false
+            if (isConnected) {
+                homeRefreshCoordinator.onRefresh { isRefreshing ->
+                    _isRefreshing.value = isRefreshing
+                }
+            }
+        }
+    }
+
     fun openSearch() {
         navigationManager.navigate(Route.HomeSearchRoute)
     }

data/src/main/java/hu/bbara/purefin/data/catalog/InMemoryAppContentRepository.kt

@@ -24,6 +24,7 @@ import hu.bbara.purefin.data.offline.cache.toSeries
 import hu.bbara.purefin.model.Library
 import hu.bbara.purefin.model.LibraryKind
 import hu.bbara.purefin.model.Media
+import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
@@ -51,6 +52,7 @@ class InMemoryAppContentRepository @Inject constructor(
     private val networkMonitor: NetworkMonitor,
 ) : HomeRepository {
     private val scope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
+    private var cacheLoadJob: Job? = null
     private var refreshJob: Job? = null
 
     @OptIn(ExperimentalAtomicApi::class)
@@ -72,9 +74,7 @@ class InMemoryAppContentRepository @Inject constructor(
     override val latestLibraryContent: StateFlow<Map<UUID, List<Media>>> = latestLibraryContentState.asStateFlow()
 
     init {
-        scope.launch {
+        ensureReady()
-            ensureReady()
-        }
     }
 
     @OptIn(ExperimentalAtomicApi::class)
@@ -83,17 +83,23 @@ class InMemoryAppContentRepository @Inject constructor(
             return
         }
         Timber.tag(TAG).d("Initializing home repository")
-        scope.launch { loadHomeCache() }
+        val loadJob = scope.launch { loadHomeCache() }
-        scope.launch { refreshHomeData() }
+        cacheLoadJob = loadJob
+        scope.launch {
+            loadJob.join()
+            refreshHomeData()
+        }
     }
 
     override suspend fun refreshHomeData() {
+        cacheLoadJob?.join()
         val job = synchronized(this) {
             refreshJob?.takeIf { it.isActive } ?: scope.launch {
-                runCatching {
+                val snapshot = snapshotHomeContent()
+                try {
                     Timber.tag(TAG).d("Refreshing home data")
                     if (!networkMonitor.isOnline.first()) {
-                        return@runCatching
+                        return@launch
                     }
                     loadLibraries()
                     loadSuggestions()
@@ -102,8 +108,15 @@ class InMemoryAppContentRepository @Inject constructor(
                     loadLatestLibraryContent()
                     Timber.tag(TAG).d("Home refresh successful")
                     persistHomeCache()
-                }.onFailure { error ->
+                } catch (error: CancellationException) {
+                    throw error
+                } catch (error: HomeRefreshFailedException) {
+                    restoreHomeContent(snapshot)
+                    Timber.tag(TAG).w(error.cause, "Home refresh failed; keeping cached content")
+                } catch (error: Exception) {
+                    restoreHomeContent(snapshot)
                     Timber.tag(TAG).w(error, "Home refresh failed; keeping cached content")
+                    networkMonitor.checkConnection()
                 }
             }.also { refreshJob = it }
         }
@@ -200,8 +213,7 @@ class InMemoryAppContentRepository @Inject constructor(
     private suspend fun loadLibraries() {
         val librariesItem = runCatching { jellyfinApiClient.getLibraries() }
             .getOrElse { error ->
-                Timber.tag(TAG).w(error, "Unable to load libraries")
+                handleRefreshFailure(error, "Unable to load libraries")
-                return
             }
         val filteredLibraries = librariesItem.filter {
             it.collectionType == CollectionType.MOVIES || it.collectionType == CollectionType.TVSHOWS
@@ -222,8 +234,7 @@ class InMemoryAppContentRepository @Inject constructor(
     private suspend fun loadLibrary(library: Library): Library {
         val contentItem = runCatching { jellyfinApiClient.getLibraryContent(library.id) }
             .getOrElse { error ->
-                Timber.tag(TAG).w(error, "Unable to load library ${library.id}")
+                handleRefreshFailure(error, "Unable to load library ${library.id}")
-                return library
             }
         return when (library.type) {
             LibraryKind.MOVIES -> library.copy(
@@ -240,8 +251,7 @@ class InMemoryAppContentRepository @Inject constructor(
     private suspend fun loadSuggestions() {
         val suggestionsItems = runCatching { jellyfinApiClient.getSuggestions() }
             .getOrElse { error ->
-                Timber.tag(TAG).w(error, "Unable to load suggestions")
+                handleRefreshFailure(error, "Unable to load suggestions")
-                return
             }
         suggestionsState.value = suggestionsItems.mapNotNull { item ->
             when (item.type) {
@@ -261,8 +271,7 @@ class InMemoryAppContentRepository @Inject constructor(
     private suspend fun loadContinueWatching() {
         val continueWatchingItems = runCatching { jellyfinApiClient.getContinueWatching() }
             .getOrElse { error ->
-                Timber.tag(TAG).w(error, "Unable to load continue watching")
+                handleRefreshFailure(error, "Unable to load continue watching")
-                return
             }
         continueWatchingState.value = continueWatchingItems.mapNotNull { item ->
             when (item.type) {
@@ -282,8 +291,7 @@ class InMemoryAppContentRepository @Inject constructor(
     private suspend fun loadNextUp() {
         val nextUpItems = runCatching { jellyfinApiClient.getNextUpEpisodes() }
             .getOrElse { error ->
-                Timber.tag(TAG).w(error, "Unable to load next up")
+                handleRefreshFailure(error, "Unable to load next up")
-                return
             }
         nextUpState.value = nextUpItems.map { item ->
             Media.EpisodeMedia(episodeId = item.id, seriesId = item.seriesId!!)
@@ -297,8 +305,7 @@ class InMemoryAppContentRepository @Inject constructor(
     private suspend fun loadLatestLibraryContent() {
         val librariesItem = runCatching { jellyfinApiClient.getLibraries() }
             .getOrElse { error ->
-                Timber.tag(TAG).w(error, "Unable to load latest library content")
+                handleRefreshFailure(error, "Unable to load latest library content")
-                return
             }
         val filteredLibraries = librariesItem.filter {
             it.collectionType == CollectionType.MOVIES || it.collectionType == CollectionType.TVSHOWS
@@ -306,8 +313,7 @@ class InMemoryAppContentRepository @Inject constructor(
         val latestLibraryContents = filteredLibraries.associate { library ->
             val latestFromLibrary = runCatching { jellyfinApiClient.getLatestFromLibrary(library.id) }
                 .getOrElse { error ->
-                    Timber.tag(TAG).w(error, "Unable to load latest items for library ${library.id}")
+                    handleRefreshFailure(error, "Unable to load latest items for library ${library.id}")
-                    emptyList()
                 }
             library.id to when (library.collectionType) {
                 CollectionType.MOVIES -> latestFromLibrary.map {
@@ -341,6 +347,31 @@ class InMemoryAppContentRepository @Inject constructor(
         return userSessionRepository.serverUrl.first()
     }
 
+    private fun snapshotHomeContent(): HomeContentSnapshot = HomeContentSnapshot(
+        libraries = librariesState.value,
+        suggestions = suggestionsState.value,
+        continueWatching = continueWatchingState.value,
+        nextUp = nextUpState.value,
+        latestLibraryContent = latestLibraryContentState.value,
+    )
+
+    private fun restoreHomeContent(snapshot: HomeContentSnapshot) {
+        librariesState.value = snapshot.libraries
+        suggestionsState.value = snapshot.suggestions
+        continueWatchingState.value = snapshot.continueWatching
+        nextUpState.value = snapshot.nextUp
+        latestLibraryContentState.value = snapshot.latestLibraryContent
+    }
+
+    private suspend fun handleRefreshFailure(error: Throwable, message: String): Nothing {
+        if (error is CancellationException) {
+            throw error
+        }
+        Timber.tag(TAG).w(error, message)
+        networkMonitor.checkConnection()
+        throw HomeRefreshFailedException(error)
+    }
+
     companion object {
         private const val TAG = "InMemoryAppContentRepo"
     }
@@ -351,3 +382,13 @@ private data class ReferencedHomeMediaIds(
     val seriesIds: Set<UUID>,
     val episodeIds: Set<UUID>,
 )
+
+private data class HomeContentSnapshot(
+    val libraries: List<Library>,
+    val suggestions: List<Media>,
+    val continueWatching: List<Media>,
+    val nextUp: List<Media>,
+    val latestLibraryContent: Map<UUID, List<Media>>,
+)
+
+private class HomeRefreshFailedException(cause: Throwable) : RuntimeException(cause)

data/src/main/java/hu/bbara/purefin/data/jellyfin/ConnectivityNetworkMonitor.kt

@@ -7,28 +7,48 @@ import android.net.NetworkCapabilities
 import android.net.NetworkRequest
 import dagger.hilt.android.qualifiers.ApplicationContext
 import hu.bbara.purefin.core.data.NetworkMonitor
-import kotlinx.coroutines.channels.awaitClose
+import hu.bbara.purefin.data.jellyfin.client.JellyfinApiClient
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.callbackFlow
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withTimeoutOrNull
+import timber.log.Timber
 import javax.inject.Inject
 import javax.inject.Singleton
 
 @Singleton
 class ConnectivityNetworkMonitor @Inject constructor(
     @ApplicationContext private val context: Context,
+    private val jellyfinApiClient: JellyfinApiClient,
 ) : NetworkMonitor {
 
-    override val isOnline: Flow<Boolean> = callbackFlow {
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
-        val connectivityManager = context.getSystemService(ConnectivityManager::class.java)
+    private val connectivityManager = context.getSystemService(ConnectivityManager::class.java)
+    private val isAndroidConnected = MutableStateFlow(connectivityManager.isCurrentlyConnected())
+    private val isServerReachable = MutableStateFlow(true)
 
+    override val isOnline: Flow<Boolean> = combine(
+        isAndroidConnected,
+        isServerReachable,
+    ) { androidConnected, serverReachable ->
+        androidConnected && serverReachable
+    }.distinctUntilChanged()
+
+    init {
         val callback = object : ConnectivityManager.NetworkCallback() {
             override fun onAvailable(network: Network) {
-                trySend(true)
+                isAndroidConnected.value = true
+                scope.launch { updateServerReachability() }
             }
 
             override fun onLost(network: Network) {
-                trySend(connectivityManager.isCurrentlyConnected())
+                isAndroidConnected.value = connectivityManager.isCurrentlyConnected()
             }
         }
 
@@ -36,14 +56,42 @@ class ConnectivityNetworkMonitor @Inject constructor(
             .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
             .build()
 
-        trySend(connectivityManager.isCurrentlyConnected())
         connectivityManager.registerNetworkCallback(request, callback)
-        awaitClose { connectivityManager.unregisterNetworkCallback(callback) }
+    }
-    }.distinctUntilChanged()
+
+    override suspend fun checkConnection(): Boolean {
+        val androidConnected = connectivityManager.isCurrentlyConnected()
+        isAndroidConnected.value = androidConnected
+        if (!androidConnected) {
+            isServerReachable.value = false
+            return false
+        }
+        return updateServerReachability()
+    }
+
+    private suspend fun updateServerReachability(): Boolean {
+        val reachable = try {
+            withTimeoutOrNull(SERVER_CHECK_TIMEOUT_MS) {
+                jellyfinApiClient.probeServer()
+            } ?: false
+        } catch (error: CancellationException) {
+            throw error
+        } catch (error: Exception) {
+            Timber.tag(TAG).w(error, "Jellyfin server reachability check failed")
+            false
+        }
+        isServerReachable.value = reachable
+        return reachable
+    }
 
     private fun ConnectivityManager.isCurrentlyConnected(): Boolean {
         val network = activeNetwork ?: return false
         val caps = getNetworkCapabilities(network) ?: return false
         return caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
     }
+
+    private companion object {
+        private const val TAG = "ConnectivityNetworkMonitor"
+        private const val SERVER_CHECK_TIMEOUT_MS = 5_000L
+    }
 }

data/src/main/java/hu/bbara/purefin/data/jellyfin/DefaultPlayableMediaRepository.kt

@@ -67,18 +67,31 @@ class DefaultPlayableMediaRepository @Inject constructor(
             return getOfflineDownloadedPlayableMedia(mediaId, downloadedMediaItem)
         }
 
-        return runCatching {
+        val onlinePlayableMedia = runCatching {
             getOnlinePlayableMedia(mediaId, downloadedMediaItem)
-                ?: getOfflineDownloadedPlayableMedia(mediaId, downloadedMediaItem)
         }.getOrElse { error ->
             if (error is CancellationException) throw error
+            networkMonitor.checkConnection()
             Timber.tag(TAG).w(error, "Unable to load online metadata for downloaded media $mediaId")
-            getOfflineDownloadedPlayableMedia(mediaId, downloadedMediaItem)
+            null
         }
+        if (onlinePlayableMedia != null) return onlinePlayableMedia
+
+        networkMonitor.checkConnection()
+        return getOfflineDownloadedPlayableMedia(mediaId, downloadedMediaItem)
     }
 
     private suspend fun getStreamingPlayableMedia(mediaId: UUID): PlayableMedia? {
-        return getOnlinePlayableMedia(mediaId, downloadedMediaItem = null)
+        if (!networkMonitor.isOnline.first()) return null
+
+        return runCatching {
+            getOnlinePlayableMedia(mediaId, downloadedMediaItem = null)
+        }.getOrElse { error ->
+            if (error is CancellationException) throw error
+            networkMonitor.checkConnection()
+            Timber.tag(TAG).w(error, "Unable to load streaming media $mediaId")
+            null
+        }
     }
 
     private suspend fun getOnlinePlayableMedia(

data/src/main/java/hu/bbara/purefin/data/jellyfin/client/JellyfinApiClient.kt

@@ -26,6 +26,7 @@ import org.jellyfin.sdk.api.client.extensions.mediaSegmentsApi
 import org.jellyfin.sdk.api.client.extensions.playStateApi
 import org.jellyfin.sdk.api.client.extensions.quickConnectApi
 import org.jellyfin.sdk.api.client.extensions.suggestionsApi
+import org.jellyfin.sdk.api.client.extensions.systemApi
 import org.jellyfin.sdk.api.client.extensions.tvShowsApi
 import org.jellyfin.sdk.api.client.extensions.userApi
 import org.jellyfin.sdk.api.client.extensions.userLibraryApi
@@ -227,6 +228,16 @@ class JellyfinApiClient @Inject constructor(
         }
     }
 
+    suspend fun probeServer(): Boolean = withContext(Dispatchers.IO) {
+        logRequest("probeServer") {
+            if (!ensureConfigured()) {
+                return@logRequest false
+            }
+            api.systemApi.getPingSystem()
+            true
+        }
+    }
+
     suspend fun getLibraryContent(libraryId: UUID): List<BaseItemDto> = withContext(Dispatchers.IO) {
         logRequest("getLibraryContent") {
             if (!ensureConfigured()) {