Limit TrackWorker parallelistm when device in use

app/src/main/kotlin/org/koitharu/kotatsu/tracker/work/TrackWorker.kt

@@ -53,6 +53,7 @@ import org.koitharu.kotatsu.core.logs.TrackerLogger
 import org.koitharu.kotatsu.core.prefs.AppSettings
 import org.koitharu.kotatsu.core.util.ext.awaitUniqueWorkInfoByName
 import org.koitharu.kotatsu.core.util.ext.checkNotificationPermission
+import org.koitharu.kotatsu.core.util.ext.powerManager
 import org.koitharu.kotatsu.core.util.ext.toBitmapOrNull
 import org.koitharu.kotatsu.core.util.ext.trySetForeground
 import org.koitharu.kotatsu.details.ui.DetailsActivity
@@ -140,7 +141,7 @@ class TrackWorker @AssistedInject constructor(
 	}
 
 	private suspend fun checkUpdatesAsync(tracks: List<TrackingItem>): List<MangaUpdates> {
-		val semaphore = Semaphore(MAX_PARALLELISM)
+		val semaphore = Semaphore(if (isDeviceInUse()) 1 else MAX_PARALLELISM)
 		return channelFlow {
 			for ((track, channelId) in tracks) {
 				launch {
@@ -289,6 +290,15 @@ class TrackWorker @AssistedInject constructor(
 			.build()
 	}
 
+
+	private fun isDeviceInUse(): Boolean {
+		if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+			return false
+		}
+		val powerManager = applicationContext.powerManager ?: return false
+		return !powerManager.isDeviceIdleMode
+	}
+
 	@Reusable
 	class Scheduler @Inject constructor(
 		private val workManager: WorkManager,