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+/*
+ * Copyright © 2021 Soren Stoutner <soren@stoutner.com>.
+ *
+ * This file is part of Privacy Cell <https://www.stoutner.com/privacy-cell>.
+ *
+ * Privacy Cell is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Privacy Cell 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Privacy Cell. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.stoutner.privacycell.workers
+
+import android.app.ActivityManager
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.ServiceConnection
+import android.os.IBinder
+
+import androidx.preference.PreferenceManager
+import androidx.work.OneTimeWorkRequestBuilder
+import androidx.work.OutOfQuotaPolicy
+import androidx.work.WorkManager
+import androidx.work.Worker
+import androidx.work.WorkerParameters
+
+import com.stoutner.privacycell.R
+import com.stoutner.privacycell.services.RealtimeMonitoringService
+
+class RegisterRealtimeListenerWorker(appContext: Context, workerParameters: WorkerParameters) : Worker(appContext, workerParameters) {
+ override fun doWork(): Result {
+ // Get a handle for the shared preferences.
+ val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(applicationContext)
+
+ // Get the realtime monitoring preference. Sometimes the shared preferences can't return a value in time, because Android sucks.
+ // So, the default value is set to true, which is the safest value if the shared preferences can't be queried.
+ val realtimeMonitoring = sharedPreferences.getBoolean(applicationContext.getString(R.string.realtime_monitoring_key), true)
+
+ // Perform the functions according to the realtime monitoring status.
+ if (realtimeMonitoring) { // Realtime monitoring is enabled.
+ // Get a handle for the activity manager.
+ val activityManager: ActivityManager = applicationContext.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
+
+ // Get a list of the running service info. The deprecated `getRunningServices()` now only returns services stared by Privacy Cell, but that is all we want to know anyway.
+ val runningServiceInfoList: List<ActivityManager.RunningServiceInfo> = activityManager.getRunningServices(1)
+
+ // Check to see if the service is currently running.
+ if (runningServiceInfoList.isEmpty()) { // The service is currently stopped.
+ // Create a restart service work request. This task can't be run from here because of Android 12's foreground service restrictions on non-expedited workers.
+ val restartServiceWorkRequest = OneTimeWorkRequestBuilder<RestartServiceWorker>().apply {
+ // Set the status to be expedited so that it can start a foreground service.
+ setExpedited(OutOfQuotaPolicy.RUN_AS_NON_EXPEDITED_WORK_REQUEST)
+ }.build()
+
+ // Make it so.
+ WorkManager.getInstance(applicationContext).enqueue(restartServiceWorkRequest)
+ } else { // The service is currently running.
+ // Create a service connection.
+ val serviceConnection = object : ServiceConnection {
+ override fun onServiceConnected(componentName: ComponentName, serviceIBinder: IBinder) {
+ // Get a handle for the realtime monitoring service binder.
+ val realtimeMonitoringServiceBinder = serviceIBinder as RealtimeMonitoringService.ServiceBinder
+
+ // Get a handle for the realtime monitoring service.
+ val realtimeMonitoringService = realtimeMonitoringServiceBinder.getService()
+
+ // Register the telephony manager listener.
+ realtimeMonitoringService.registerTelephonyManagerListener()
+
+ // Unbind the service.
+ applicationContext.unbindService(this)
+ }
+
+ override fun onServiceDisconnected(componentName: ComponentName) {
+ // Do nothing.
+ }
+ }
+
+ // Bind to the realtime monitoring service.
+ applicationContext.bindService(Intent(applicationContext, RealtimeMonitoringService::class.java), serviceConnection, 0)
+ }
+ } else { // Realtime monitoring is disabled.
+ // Cancel the realtime listener work request.
+ WorkManager.getInstance(applicationContext).cancelUniqueWork(applicationContext.getString(R.string.register_listener_work_request))
+ }
+
+ // Return a success.
+ return Result.success()
+ }
+}
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