fix: android - execute in background

mobile/android/app/src/main/kotlin/app/alextran/immich/ImmichApp.kt

@@ -3,7 +3,6 @@ package app.alextran.immich
 import android.app.Application
 import androidx.work.Configuration
 import androidx.work.WorkManager
-import app.alextran.immich.background.BackgroundWorkerApiImpl
 
 class ImmichApp : Application() {
   override fun onCreate() {
@@ -17,6 +16,5 @@ class ImmichApp : Application() {
     // As a workaround, we also run a backup check when initializing the application
 
     ContentObserverWorker.startBackupWorker(context = this, delayMilliseconds = 0)
-    BackgroundWorkerApiImpl.enqueueBackgroundWorker(this)
   }
 }

mobile/android/app/src/main/kotlin/app/alextran/immich/ImmichPlugin.kt

@@ -0,0 +1,20 @@
+package app.alextran.immich
+
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+
+fun <T> dispatch(
+  dispatcher: CoroutineDispatcher = Dispatchers.IO,
+  callback: (Result<T>) -> Unit,
+  block: () -> T
+) {
+  CoroutineScope(dispatcher).launch {
+    val result = runCatching { block() }
+    withContext(Dispatchers.Main) {
+      callback(result)
+    }
+  }
+}

mobile/android/app/src/main/kotlin/app/alextran/immich/background/BackgroundEngineLock.kt

@@ -2,6 +2,7 @@ package app.alextran.immich.background
 
 import android.content.Context
 import android.util.Log
+import app.alextran.immich.dispatch
 import io.flutter.embedding.engine.plugins.FlutterPlugin
 import java.util.concurrent.atomic.AtomicInteger
 
@@ -26,13 +27,13 @@ class BackgroundEngineLock(context: Context) : BackgroundWorkerLockApi, FlutterP
     }
   }
 
-    override fun lock() {
+  override fun lock(callback: (Result<Unit>) -> Unit) = dispatch(callback = callback) {
     BackgroundWorkerPreferences(ctx).setLocked(true)
     checkAndEnforceBackgroundLock(ctx)
     Log.i(TAG, "Background worker is locked")
   }
 
-    override fun unlock() {
+  override fun unlock(callback: (Result<Unit>) -> Unit) = dispatch(callback = callback) {
     BackgroundWorkerPreferences(ctx).setLocked(false)
     Log.i(TAG, "Background worker is unlocked")
   }

mobile/android/app/src/main/kotlin/app/alextran/immich/background/BackgroundWorker.g.kt

@@ -133,11 +133,12 @@ private open class BackgroundWorkerPigeonCodec : StandardMessageCodec() {
   }
 }
 
+
 /** Generated interface from Pigeon that represents a handler of messages from Flutter. */
 interface BackgroundWorkerFgHostApi {
-  fun enable()
+  fun enable(callback: (Result<Unit>) -> Unit)
-  fun configure(settings: BackgroundWorkerSettings)
+  fun configure(settings: BackgroundWorkerSettings, callback: (Result<Unit>) -> Unit)
-  fun disable()
+  fun disable(callback: (Result<Unit>) -> Unit)
 
   companion object {
     /** The codec used by BackgroundWorkerFgHostApi. */
@@ -152,13 +153,14 @@ interface BackgroundWorkerFgHostApi {
         val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.BackgroundWorkerFgHostApi.enable$separatedMessageChannelSuffix", codec)
         if (api != null) {
           channel.setMessageHandler { _, reply ->
-            val wrapped: List<Any?> = try {
+            api.enable{ result: Result<Unit> ->
-              api.enable()
+              val error = result.exceptionOrNull()
-              listOf(null)
+              if (error != null) {
-            } catch (exception: Throwable) {
+                reply.reply(BackgroundWorkerPigeonUtils.wrapError(error))
-              BackgroundWorkerPigeonUtils.wrapError(exception)
+              } else {
+                reply.reply(BackgroundWorkerPigeonUtils.wrapResult(null))
+              }
             }
-            reply.reply(wrapped)
           }
         } else {
           channel.setMessageHandler(null)
@@ -170,13 +172,14 @@ interface BackgroundWorkerFgHostApi {
           channel.setMessageHandler { message, reply ->
             val args = message as List<Any?>
             val settingsArg = args[0] as BackgroundWorkerSettings
-            val wrapped: List<Any?> = try {
+            api.configure(settingsArg) { result: Result<Unit> ->
-              api.configure(settingsArg)
+              val error = result.exceptionOrNull()
-              listOf(null)
+              if (error != null) {
-            } catch (exception: Throwable) {
+                reply.reply(BackgroundWorkerPigeonUtils.wrapError(error))
-              BackgroundWorkerPigeonUtils.wrapError(exception)
+              } else {
+                reply.reply(BackgroundWorkerPigeonUtils.wrapResult(null))
+              }
             }
-            reply.reply(wrapped)
           }
         } else {
           channel.setMessageHandler(null)
@@ -186,13 +189,14 @@ interface BackgroundWorkerFgHostApi {
         val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.BackgroundWorkerFgHostApi.disable$separatedMessageChannelSuffix", codec)
         if (api != null) {
           channel.setMessageHandler { _, reply ->
-            val wrapped: List<Any?> = try {
+            api.disable{ result: Result<Unit> ->
-              api.disable()
+              val error = result.exceptionOrNull()
-              listOf(null)
+              if (error != null) {
-            } catch (exception: Throwable) {
+                reply.reply(BackgroundWorkerPigeonUtils.wrapError(error))
-              BackgroundWorkerPigeonUtils.wrapError(exception)
+              } else {
+                reply.reply(BackgroundWorkerPigeonUtils.wrapResult(null))
+              }
             }
-            reply.reply(wrapped)
           }
         } else {
           channel.setMessageHandler(null)

mobile/android/app/src/main/kotlin/app/alextran/immich/background/BackgroundWorker.kt

@@ -215,7 +215,7 @@ class BackgroundWorker(context: Context, params: WorkerParameters) :
     if (foregroundFuture != null && !foregroundFuture.isCancelled && !foregroundFuture.isDone) {
       try {
         foregroundFuture.get(500, TimeUnit.MILLISECONDS)
-      } catch (e: Exception) {
+      } catch (_: Exception) {
         // ignored, there is nothing to be done
       }
     }

mobile/android/app/src/main/kotlin/app/alextran/immich/background/BackgroundWorkerApiImpl.kt

@@ -8,6 +8,7 @@ import androidx.work.Constraints
 import androidx.work.ExistingWorkPolicy
 import androidx.work.OneTimeWorkRequest
 import androidx.work.WorkManager
+import app.alextran.immich.dispatch
 import io.flutter.embedding.engine.FlutterEngineCache
 import java.util.concurrent.TimeUnit
 
@@ -16,16 +17,18 @@ private const val TAG = "BackgroundWorkerApiImpl"
 class BackgroundWorkerApiImpl(context: Context) : BackgroundWorkerFgHostApi {
   private val ctx: Context = context.applicationContext
 
-  override fun enable() {
+  override fun enable(callback: (Result<Unit>) -> Unit) =
-    enqueueMediaObserver(ctx)
+    dispatch(callback = callback) { enqueueMediaObserver(ctx) }
-  }
 
-  override fun configure(settings: BackgroundWorkerSettings) {
+  override fun configure(
+    settings: BackgroundWorkerSettings,
+    callback: (Result<Unit>) -> Unit
+  ) = dispatch(callback = callback) {
     BackgroundWorkerPreferences(ctx).updateSettings(settings)
     enqueueMediaObserver(ctx)
   }
 
-  override fun disable() {
+  override fun disable(callback: (Result<Unit>) -> Unit) = dispatch(callback = callback) {
     WorkManager.getInstance(ctx).apply {
       cancelUniqueWork(OBSERVER_WORKER_NAME)
       cancelUniqueWork(BACKGROUND_WORKER_NAME)
@@ -38,7 +41,6 @@ class BackgroundWorkerApiImpl(context: Context) : BackgroundWorkerFgHostApi {
     private const val OBSERVER_WORKER_NAME = "immich/MediaObserverV1"
     const val ENGINE_CACHE_KEY = "immich::background_worker::engine"
 
-
     fun enqueueMediaObserver(ctx: Context) {
       val settings = BackgroundWorkerPreferences(ctx).getSettings()
       val constraints = Constraints.Builder().apply {

mobile/android/app/src/main/kotlin/app/alextran/immich/background/BackgroundWorkerLock.g.kt

@@ -44,10 +44,11 @@ private open class BackgroundWorkerLockPigeonCodec : StandardMessageCodec() {
   }
 }
 
+
 /** Generated interface from Pigeon that represents a handler of messages from Flutter. */
 interface BackgroundWorkerLockApi {
-  fun lock()
+  fun lock(callback: (Result<Unit>) -> Unit)
-  fun unlock()
+  fun unlock(callback: (Result<Unit>) -> Unit)
 
   companion object {
     /** The codec used by BackgroundWorkerLockApi. */
@@ -62,13 +63,14 @@ interface BackgroundWorkerLockApi {
         val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.BackgroundWorkerLockApi.lock$separatedMessageChannelSuffix", codec)
         if (api != null) {
           channel.setMessageHandler { _, reply ->
-            val wrapped: List<Any?> = try {
+            api.lock{ result: Result<Unit> ->
-              api.lock()
+              val error = result.exceptionOrNull()
-              listOf(null)
+              if (error != null) {
-            } catch (exception: Throwable) {
+                reply.reply(BackgroundWorkerLockPigeonUtils.wrapError(error))
-              BackgroundWorkerLockPigeonUtils.wrapError(exception)
+              } else {
+                reply.reply(BackgroundWorkerLockPigeonUtils.wrapResult(null))
+              }
             }
-            reply.reply(wrapped)
           }
         } else {
           channel.setMessageHandler(null)
@@ -78,13 +80,14 @@ interface BackgroundWorkerLockApi {
         val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.BackgroundWorkerLockApi.unlock$separatedMessageChannelSuffix", codec)
         if (api != null) {
           channel.setMessageHandler { _, reply ->
-            val wrapped: List<Any?> = try {
+            api.unlock{ result: Result<Unit> ->
-              api.unlock()
+              val error = result.exceptionOrNull()
-              listOf(null)
+              if (error != null) {
-            } catch (exception: Throwable) {
+                reply.reply(BackgroundWorkerLockPigeonUtils.wrapError(error))
-              BackgroundWorkerLockPigeonUtils.wrapError(exception)
+              } else {
+                reply.reply(BackgroundWorkerLockPigeonUtils.wrapResult(null))
+              }
             }
-            reply.reply(wrapped)
           }
         } else {
           channel.setMessageHandler(null)

mobile/android/app/src/main/kotlin/app/alextran/immich/connectivity/Connectivity.g.kt

@@ -82,9 +82,10 @@ private open class ConnectivityPigeonCodec : StandardMessageCodec() {
   }
 }
 
+
 /** Generated interface from Pigeon that represents a handler of messages from Flutter. */
 interface ConnectivityApi {
-  fun getCapabilities(): List<NetworkCapability>
+  fun getCapabilities(callback: (Result<List<NetworkCapability>>) -> Unit)
 
   companion object {
     /** The codec used by ConnectivityApi. */
@@ -100,12 +101,15 @@ interface ConnectivityApi {
         val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.ConnectivityApi.getCapabilities$separatedMessageChannelSuffix", codec, taskQueue)
         if (api != null) {
           channel.setMessageHandler { _, reply ->
-            val wrapped: List<Any?> = try {
+            api.getCapabilities{ result: Result<List<NetworkCapability>> ->
-              listOf(api.getCapabilities())
+              val error = result.exceptionOrNull()
-            } catch (exception: Throwable) {
+              if (error != null) {
-              ConnectivityPigeonUtils.wrapError(exception)
+                reply.reply(ConnectivityPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(ConnectivityPigeonUtils.wrapResult(data))
+              }
             }
-            reply.reply(wrapped)
           }
         } else {
           channel.setMessageHandler(null)

mobile/android/app/src/main/kotlin/app/alextran/immich/connectivity/ConnectivityApiImpl.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.net.ConnectivityManager
 import android.net.NetworkCapabilities
 import android.net.wifi.WifiManager
+import app.alextran.immich.dispatch
 
 class ConnectivityApiImpl(context: Context) : ConnectivityApi {
   private val connectivityManager =
@@ -11,7 +12,13 @@ class ConnectivityApiImpl(context: Context) : ConnectivityApi {
   private val wifiManager =
     context.applicationContext.getSystemService(Context.WIFI_SERVICE) as WifiManager
 
-  override fun getCapabilities(): List<NetworkCapability> {
+
+  override fun getCapabilities(callback: (Result<List<NetworkCapability>>) -> Unit) =
+    dispatch(callback = callback) {
+      getCapabilities()
+    }
+
+  private fun getCapabilities(): List<NetworkCapability> {
     val capabilities = connectivityManager.getNetworkCapabilities(connectivityManager.activeNetwork)
       ?: return emptyList()
 

mobile/android/app/src/main/kotlin/app/alextran/immich/sync/Messages.g.kt

@@ -296,13 +296,13 @@ private open class MessagesPigeonCodec : StandardMessageCodec() {
 /** Generated interface from Pigeon that represents a handler of messages from Flutter. */
 interface NativeSyncApi {
   fun shouldFullSync(): Boolean
-  fun getMediaChanges(): SyncDelta
+  fun getMediaChanges(callback: (Result<SyncDelta>) -> Unit)
   fun checkpointSync()
   fun clearSyncCheckpoint()
-  fun getAssetIdsForAlbum(albumId: String): List<String>
+  fun getAssetIdsForAlbum(albumId: String, callback: (Result<List<String>>) -> Unit)
-  fun getAlbums(): List<PlatformAlbum>
+  fun getAlbums(callback: (Result<List<PlatformAlbum>>) -> Unit)
-  fun getAssetsCountSince(albumId: String, timestamp: Long): Long
+  fun getAssetsCountSince(albumId: String, timestamp: Long, callback: (Result<Long>) -> Unit)
-  fun getAssetsForAlbum(albumId: String, updatedTimeCond: Long?): List<PlatformAsset>
+  fun getAssetsForAlbum(albumId: String, updatedTimeCond: Long?, callback: (Result<List<PlatformAsset>>) -> Unit)
   fun hashAssets(assetIds: List<String>, allowNetworkAccess: Boolean, callback: (Result<List<HashResult>>) -> Unit)
   fun cancelHashing()
 
@@ -335,12 +335,15 @@ interface NativeSyncApi {
         val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getMediaChanges$separatedMessageChannelSuffix", codec, taskQueue)
         if (api != null) {
           channel.setMessageHandler { _, reply ->
-            val wrapped: List<Any?> = try {
+            api.getMediaChanges{ result: Result<SyncDelta> ->
-              listOf(api.getMediaChanges())
+              val error = result.exceptionOrNull()
-            } catch (exception: Throwable) {
+              if (error != null) {
-              MessagesPigeonUtils.wrapError(exception)
+                reply.reply(MessagesPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(MessagesPigeonUtils.wrapResult(data))
+              }
             }
-            reply.reply(wrapped)
           }
         } else {
           channel.setMessageHandler(null)
@@ -384,12 +387,15 @@ interface NativeSyncApi {
           channel.setMessageHandler { message, reply ->
             val args = message as List<Any?>
             val albumIdArg = args[0] as String
-            val wrapped: List<Any?> = try {
+            api.getAssetIdsForAlbum(albumIdArg) { result: Result<List<String>> ->
-              listOf(api.getAssetIdsForAlbum(albumIdArg))
+              val error = result.exceptionOrNull()
-            } catch (exception: Throwable) {
+              if (error != null) {
-              MessagesPigeonUtils.wrapError(exception)
+                reply.reply(MessagesPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(MessagesPigeonUtils.wrapResult(data))
+              }
             }
-            reply.reply(wrapped)
           }
         } else {
           channel.setMessageHandler(null)
@@ -399,12 +405,15 @@ interface NativeSyncApi {
         val channel = BasicMessageChannel<Any?>(binaryMessenger, "dev.flutter.pigeon.immich_mobile.NativeSyncApi.getAlbums$separatedMessageChannelSuffix", codec, taskQueue)
         if (api != null) {
           channel.setMessageHandler { _, reply ->
-            val wrapped: List<Any?> = try {
+            api.getAlbums{ result: Result<List<PlatformAlbum>> ->
-              listOf(api.getAlbums())
+              val error = result.exceptionOrNull()
-            } catch (exception: Throwable) {
+              if (error != null) {
-              MessagesPigeonUtils.wrapError(exception)
+                reply.reply(MessagesPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(MessagesPigeonUtils.wrapResult(data))
+              }
             }
-            reply.reply(wrapped)
           }
         } else {
           channel.setMessageHandler(null)
@@ -417,12 +426,15 @@ interface NativeSyncApi {
             val args = message as List<Any?>
             val albumIdArg = args[0] as String
             val timestampArg = args[1] as Long
-            val wrapped: List<Any?> = try {
+            api.getAssetsCountSince(albumIdArg, timestampArg) { result: Result<Long> ->
-              listOf(api.getAssetsCountSince(albumIdArg, timestampArg))
+              val error = result.exceptionOrNull()
-            } catch (exception: Throwable) {
+              if (error != null) {
-              MessagesPigeonUtils.wrapError(exception)
+                reply.reply(MessagesPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(MessagesPigeonUtils.wrapResult(data))
+              }
             }
-            reply.reply(wrapped)
           }
         } else {
           channel.setMessageHandler(null)
@@ -435,12 +447,15 @@ interface NativeSyncApi {
             val args = message as List<Any?>
             val albumIdArg = args[0] as String
             val updatedTimeCondArg = args[1] as Long?
-            val wrapped: List<Any?> = try {
+            api.getAssetsForAlbum(albumIdArg, updatedTimeCondArg) { result: Result<List<PlatformAsset>> ->
-              listOf(api.getAssetsForAlbum(albumIdArg, updatedTimeCondArg))
+              val error = result.exceptionOrNull()
-            } catch (exception: Throwable) {
+              if (error != null) {
-              MessagesPigeonUtils.wrapError(exception)
+                reply.reply(MessagesPigeonUtils.wrapError(error))
+              } else {
+                val data = result.getOrNull()
+                reply.reply(MessagesPigeonUtils.wrapResult(data))
+              }
             }
-            reply.reply(wrapped)
           }
         } else {
           channel.setMessageHandler(null)

mobile/android/app/src/main/kotlin/app/alextran/immich/sync/MessagesImpl26.kt

@@ -18,7 +18,7 @@ class NativeSyncApiImpl26(context: Context) : NativeSyncApiImplBase(context), Na
     // No-op for Android 10 and below
   }
 
-  override fun getMediaChanges(): SyncDelta {
+  override fun getMediaChanges(callback: (Result<SyncDelta>) -> Unit) =
-    throw IllegalStateException("Method not supported on this Android version.")
+    callback(Result.failure(IllegalStateException("Method not supported on this Android version.")))
-  }
+
 }

mobile/android/app/src/main/kotlin/app/alextran/immich/sync/MessagesImpl30.kt

@@ -5,6 +5,7 @@ import android.os.Build
 import android.provider.MediaStore
 import androidx.annotation.RequiresApi
 import androidx.annotation.RequiresExtension
+import app.alextran.immich.dispatch
 import kotlinx.serialization.json.Json
 
 @RequiresApi(Build.VERSION_CODES.Q)
@@ -47,7 +48,12 @@ class NativeSyncApiImpl30(context: Context) : NativeSyncApiImplBase(context), Na
     }
   }
 
-  override fun getMediaChanges(): SyncDelta {
+  override fun getMediaChanges(callback: (Result<SyncDelta>) -> Unit) =
+    dispatch(callback = callback) {
+      getMediaChanges()
+    }
+
+  private fun getMediaChanges(): SyncDelta {
     val genMap = getSavedGenerationMap()
     val currentVolumes = MediaStore.getExternalVolumeNames(ctx)
     val changed = mutableListOf<PlatformAsset>()

mobile/android/app/src/main/kotlin/app/alextran/immich/sync/MessagesImplBase.kt

@@ -7,6 +7,7 @@ import android.database.Cursor
 import android.provider.MediaStore
 import android.util.Base64
 import androidx.core.database.getStringOrNull
+import app.alextran.immich.dispatch
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
@@ -145,7 +146,10 @@ open class NativeSyncApiImplBase(context: Context) {
     }
   }
 
-  fun getAlbums(): List<PlatformAlbum> {
+  fun getAlbums(callback: (Result<List<PlatformAlbum>>) -> Unit) =
+    dispatch(callback = callback) { getAlbums() }
+
+  private fun getAlbums(): List<PlatformAlbum> {
     val albums = mutableListOf<PlatformAlbum>()
     val albumsCount = mutableMapOf<String, Int>()
 
@@ -192,7 +196,10 @@ open class NativeSyncApiImplBase(context: Context) {
       .sortedBy { it.id }
   }
 
-  fun getAssetIdsForAlbum(albumId: String): List<String> {
+  fun getAssetIdsForAlbum(albumId: String, callback: (Result<List<String>>) -> Unit) =
+    dispatch(callback = callback) { getAssetIdsForAlbum(albumId); }
+
+  private fun getAssetIdsForAlbum(albumId: String): List<String> {
     val projection = arrayOf(MediaStore.MediaColumns._ID)
 
     return getCursor(
@@ -208,15 +215,23 @@ open class NativeSyncApiImplBase(context: Context) {
     } ?: emptyList()
   }
 
-  fun getAssetsCountSince(albumId: String, timestamp: Long): Long =
+  fun getAssetsCountSince(albumId: String, timestamp: Long, callback: (Result<Long>) -> Unit) =
+    dispatch(callback = callback) { getAssetsCountSince(albumId, timestamp) }
+
+  private fun getAssetsCountSince(albumId: String, timestamp: Long): Long =
     getCursor(
       MediaStore.VOLUME_EXTERNAL,
       "$BUCKET_SELECTION AND ${MediaStore.Files.FileColumns.DATE_ADDED} > ? AND $MEDIA_SELECTION",
       arrayOf(albumId, timestamp.toString(), *MEDIA_SELECTION_ARGS),
     )?.use { cursor -> cursor.count.toLong() } ?: 0L
 
+  fun getAssetsForAlbum(
+    albumId: String,
+    updatedTimeCond: Long?,
+    callback: (Result<List<PlatformAsset>>) -> Unit
+  ) = dispatch(callback = callback) { getAssetsForAlbum(albumId, updatedTimeCond) }
 
-  fun getAssetsForAlbum(albumId: String, updatedTimeCond: Long?): List<PlatformAsset> {
+  private fun getAssetsForAlbum(albumId: String, updatedTimeCond: Long?): List<PlatformAsset> {
     var selection = "$BUCKET_SELECTION AND $MEDIA_SELECTION"
     val selectionArgs = mutableListOf(albumId, *MEDIA_SELECTION_ARGS)
 
@@ -254,7 +269,7 @@ open class NativeSyncApiImplBase(context: Context) {
         }.awaitAll()
 
         callback(Result.success(results))
-      } catch (e: CancellationException) {
+      } catch (_: CancellationException) {
         callback(
           Result.failure(
             FlutterError(

mobile/pigeon/background_worker_api.dart

@@ -20,10 +20,13 @@ class BackgroundWorkerSettings {
 
 @HostApi()
 abstract class BackgroundWorkerFgHostApi {
+  @async
   void enable();
 
+  @async
   void configure(BackgroundWorkerSettings settings);
 
+  @async
   void disable();
 }
 

mobile/pigeon/background_worker_lock_api.dart

@@ -11,7 +11,9 @@ import 'package:pigeon/pigeon.dart';
 )
 @HostApi()
 abstract class BackgroundWorkerLockApi {
+  @async
   void lock();
 
+  @async
   void unlock();
 }

mobile/pigeon/connectivity_api.dart

@@ -15,6 +15,7 @@ enum NetworkCapability { cellular, wifi, vpn, unmetered }
 
 @HostApi()
 abstract class ConnectivityApi {
+  @async
   @TaskQueue(type: TaskQueueType.serialBackgroundThread)
   List<NetworkCapability> getCapabilities();
 }

mobile/pigeon/native_sync_api.dart

@@ -83,6 +83,7 @@ class HashResult {
 abstract class NativeSyncApi {
   bool shouldFullSync();
 
+  @async
   @TaskQueue(type: TaskQueueType.serialBackgroundThread)
   SyncDelta getMediaChanges();
 
@@ -90,15 +91,19 @@ abstract class NativeSyncApi {
 
   void clearSyncCheckpoint();
 
+  @async
   @TaskQueue(type: TaskQueueType.serialBackgroundThread)
   List<String> getAssetIdsForAlbum(String albumId);
 
+  @async
   @TaskQueue(type: TaskQueueType.serialBackgroundThread)
   List<PlatformAlbum> getAlbums();
 
+  @async
   @TaskQueue(type: TaskQueueType.serialBackgroundThread)
   int getAssetsCountSince(String albumId, int timestamp);
 
+  @async
   @TaskQueue(type: TaskQueueType.serialBackgroundThread)
   List<PlatformAsset> getAssetsForAlbum(String albumId, {int? updatedTimeCond});