ConfigurationAccessService: prevent service from being stopped when app loses focus

This makes the ConfigurationAccessService (formerly ConfigurationFtpService) start in foreground
through the use of a persistent notification so that it isn't stopped by the system after the app
loses the focus on the user's screen, which happens when the user switches to an FTP client
application on the same device.

1 files changed, 28 insertions, 11 deletions

diff --git a/app/src/main/java/org/pacien/tincapp/context/AppNotificationManager.kt b/app/src/main/java/org/pacien/tincapp/context/AppNotificationManager.kt
index 38bf6e4..9d731a5 100644
--- a/app/src/main/java/org/pacien/tincapp/context/AppNotificationManager.kt
+++ b/app/src/main/java/org/pacien/tincapp/context/AppNotificationManager.kt
@@ -1,6 +1,6 @@
 /*
  * Tinc App, an Android binding and user interface for the tinc mesh VPN daemon
- * Copyright (C) 2017-2019 Pacien TRAN-GIRARD
+ * Copyright (C) 2017-2020 Pacien TRAN-GIRARD
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -18,6 +18,7 @@
 
 package org.pacien.tincapp.context
 
+import android.app.Notification
 import android.app.NotificationChannel
 import android.app.NotificationManager
 import android.app.PendingIntent
@@ -35,16 +36,19 @@ import org.pacien.tincapp.R
  */
 class AppNotificationManager(private val context: Context) {
   companion object {
-    private const val CHANNEL_ID = "org.pacien.tincapp.notification.channels.error"
-    private const val ERROR_NOTIFICATION_ID = 0
+    private const val ERROR_CHANNEL_ID = "org.pacien.tincapp.notification.channels.error"
+    private const val CONFIG_ACCESS_CHANNEL_ID = "org.pacien.tincapp.notification.channels.configuration"
+
+    const val ERROR_NOTIFICATION_ID = 0
+    const val CONFIG_ACCESS_NOTIFICATION_ID = 1
   }
 
   init {
-    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) registerChannel()
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) registerChannels()
   }
 
   fun notifyError(title: String, message: String, manualLink: String? = null) {
-    val notification = NotificationCompat.Builder(context, CHANNEL_ID)
+    val notification = NotificationCompat.Builder(context, ERROR_CHANNEL_ID)
       .setSmallIcon(R.drawable.ic_warning_primary_24dp)
       .setContentTitle(title)
       .setContentText(message)
@@ -62,13 +66,26 @@ class AppNotificationManager(private val context: Context) {
     NotificationManagerCompat.from(context).cancelAll()
   }
 
+  fun newConfigurationAccessNotificationBuilder() =
+    NotificationCompat.Builder(context, CONFIG_ACCESS_CHANNEL_ID)
+
   @RequiresApi(Build.VERSION_CODES.O)
-  private fun registerChannel() {
-    val name = context.getString(R.string.notification_error_channel_name)
-    val importance = NotificationManager.IMPORTANCE_HIGH
-    val channel = NotificationChannel(CHANNEL_ID, name, importance)
-    val notificationManager = context.getSystemService(NotificationManager::class.java)
-    notificationManager.createNotificationChannel(channel)
+  private fun registerChannels() {
+    context.getSystemService(NotificationManager::class.java)
+      .apply {
+        createNotificationChannel(NotificationChannel(
+          ERROR_CHANNEL_ID,
+          context.getString(R.string.notification_error_channel_name),
+          NotificationManager.IMPORTANCE_HIGH
+        ))
+      }
+      .apply {
+        createNotificationChannel(NotificationChannel(
+          CONFIG_ACCESS_CHANNEL_ID,
+          context.getString(R.string.notification_config_access_channel_name),
+          NotificationManager.IMPORTANCE_MIN
+        ))
+      }
   }
 
   private fun NotificationCompat.Builder.setHighPriority() = apply {