Make some progress on fixing realtime notifications.

[PrivacyCell.git] / app / src / main / java / com / stoutner / privacycell / workers / RegisterRealtimeListener.kt

diff --git a/app/src/main/java/com/stoutner/privacycell/workers/RegisterRealtimeListener.kt b/app/src/main/java/com/stoutner/privacycell/workers/RegisterRealtimeListener.kt
new file mode 100644 (file)
index 0000000..eaa8a55
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+++ b/app/src/main/java/com/stoutner/privacycell/workers/RegisterRealtimeListener.kt
@@ -0,0 +1,94 @@
+/*
+ * 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.WorkManager
+import androidx.work.Worker
+import androidx.work.WorkerParameters
+
+import com.stoutner.privacycell.R
+import com.stoutner.privacycell.services.RealtimeMonitoringService
+
+class RegisterRealtimeListener (appContext: Context, workerParams: WorkerParameters) : Worker(appContext, workerParams) {
+    // Store the application context.
+    private val context = appContext
+
+    override fun doWork(): Result {
+        // Get a handle for the shared preferences.
+        val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
+
+        // 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(context.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 = context.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.
+                // Start the service.
+                context.startService(Intent(context, RealtimeMonitoringService::class.java))
+            } 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.
+                        context.unbindService(this)
+                    }
+
+                    override fun onServiceDisconnected(componentName: ComponentName) {
+                        // Do nothing.
+                    }
+                }
+
+                // Bind to the realtime monitoring service.
+                context.bindService(Intent(context, RealtimeMonitoringService::class.java), serviceConnection, 0)
+            }
+        } else {  // Realtime monitoring is disabled.
+            // Cancel the realtime listener work request.
+            WorkManager.getInstance(context).cancelUniqueWork(context.getString(R.string.register_listener_work_request))
+        }
+
+        // Return a success.
+        return Result.success()
+    }
+}
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