Revert "Remove WorkManager bug workaround"

This reverts commit af654b8c40.

app/src/main/kotlin/org/koitharu/kotatsu/KotatsuApp.kt

@@ -23,6 +23,7 @@ import org.acra.sender.HttpSender
 import org.koitharu.kotatsu.core.db.MangaDatabase
 import org.koitharu.kotatsu.core.os.AppValidator
 import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.util.WorkServiceStopHelper
 import org.koitharu.kotatsu.core.util.ext.processLifecycleScope
 import org.koitharu.kotatsu.local.data.LocalMangaRepository
 import org.koitharu.kotatsu.local.data.PagesCache
@@ -72,6 +73,7 @@ class KotatsuApp : Application(), Configuration.Provider {
 			setupDatabaseObservers()
 		}
 		workScheduleManager.init()
+		WorkServiceStopHelper(workManagerProvider).setup()
 	}
 
 	override fun attachBaseContext(base: Context?) {

app/src/main/kotlin/org/koitharu/kotatsu/core/util/WorkServiceStopHelper.kt

@@ -0,0 +1,48 @@
+package org.koitharu.kotatsu.core.util
+
+import android.annotation.SuppressLint
+import androidx.lifecycle.asFlow
+import androidx.work.WorkInfo
+import androidx.work.WorkManager
+import androidx.work.WorkQuery
+import androidx.work.impl.foreground.SystemForegroundService
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.collectLatest
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.launch
+import org.koitharu.kotatsu.core.util.ext.processLifecycleScope
+import javax.inject.Provider
+
+/**
+ * Workaround for issue
+ * https://issuetracker.google.com/issues/270245927
+ * https://issuetracker.google.com/issues/280504155
+ */
+class WorkServiceStopHelper(
+	private val workManagerProvider: Provider<WorkManager>,
+) {
+
+	fun setup() {
+		processLifecycleScope.launch(Dispatchers.Default) {
+			workManagerProvider.get()
+				.getWorkInfosLiveData(WorkQuery.fromStates(WorkInfo.State.RUNNING))
+				.asFlow()
+				.map { it.isEmpty() }
+				.distinctUntilChanged()
+				.collectLatest {
+					if (it) {
+						delay(1_000)
+						stopWorkerService()
+					}
+				}
+		}
+	}
+
+	@SuppressLint("RestrictedApi")
+	private fun stopWorkerService() {
+		SystemForegroundService.getInstance()?.stop()
+	}
+}
+