Start a foreground service during restore

so the system won't kill us, even if the user navigates away.

app/src/main/AndroidManifest.xml

@@ -177,13 +177,19 @@
             android:exported="false"
             android:label="BackupJobService"
             android:permission="android.permission.BIND_JOB_SERVICE" />
-        <!-- Does the actual backup work as a foreground service -->
+        <!-- Does app restore as a foreground service -->
+        <service
+            android:name=".restore.RestoreService"
+            android:exported="false"
+            android:foregroundServiceType="dataSync"
+            android:label="RestoreService" />
+        <!-- Does the actual file backup work as a foreground service -->
         <service
             android:name=".storage.StorageBackupService"
             android:exported="false"
             android:foregroundServiceType="dataSync"
             android:label="BackupService" />
-        <!-- Does restore as a foreground service -->
+        <!-- Does file restore as a foreground service -->
         <service
             android:name=".storage.StorageRestoreService"
             android:exported="false"

app/src/main/java/com/stevesoltys/seedvault/restore/AppDataRestoreManager.kt

@@ -12,6 +12,7 @@ import android.app.backup.IRestoreObserver
 import android.app.backup.IRestoreSession
 import android.app.backup.RestoreSet
 import android.content.Context
+import android.content.Intent
 import android.os.RemoteException
 import android.os.UserHandle
 import android.util.Log
@@ -60,6 +61,7 @@ internal class AppDataRestoreManager(
 
     private var session: IRestoreSession? = null
     private val monitor = BackupMonitor()
+    private val foregroundServiceIntent = Intent(context, RestoreService::class.java)
 
     private val mRestoreProgress = MutableLiveData(
         LinkedList<AppRestoreResult>().apply {
@@ -120,6 +122,8 @@ internal class AppDataRestoreManager(
             mRestoreBackupResult.postValue(
                 RestoreBackupResult(context.getString(R.string.restore_set_error))
             )
+        } else {
+            context.startForegroundService(foregroundServiceIntent)
         }
     }
 
@@ -208,6 +212,8 @@ internal class AppDataRestoreManager(
         mRestoreProgress.postValue(list)
 
         mRestoreBackupResult.postValue(result)
+
+        context.stopService(foregroundServiceIntent)
     }
 
     fun closeSession() {

app/src/main/java/com/stevesoltys/seedvault/restore/RestoreService.kt

@@ -0,0 +1,46 @@
+/*
+ * SPDX-FileCopyrightText: 2024 The Calyx Institute
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.stevesoltys.seedvault.restore
+
+import android.app.Service
+import android.content.Intent
+import android.content.pm.ServiceInfo.FOREGROUND_SERVICE_TYPE_MANIFEST
+import android.os.IBinder
+import android.util.Log
+import com.stevesoltys.seedvault.ui.notification.BackupNotificationManager
+import com.stevesoltys.seedvault.ui.notification.NOTIFICATION_ID_RESTORE
+import org.koin.android.ext.android.inject
+
+class RestoreService : Service() {
+
+    companion object {
+        private const val TAG = "RestoreService"
+    }
+
+    private val nm: BackupNotificationManager by inject()
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        Log.i(TAG, "onStartCommand $intent $flags $startId")
+
+        startForeground(
+            NOTIFICATION_ID_RESTORE,
+            nm.getRestoreNotification(),
+            FOREGROUND_SERVICE_TYPE_MANIFEST,
+        )
+        return START_STICKY_COMPATIBILITY
+    }
+
+    override fun onBind(intent: Intent?): IBinder? {
+        return null
+    }
+
+    override fun onDestroy() {
+        Log.i(TAG, "onDestroy")
+        super.onDestroy()
+        nm.cancelRestoreNotification()
+    }
+
+}

app/src/main/java/com/stevesoltys/seedvault/restore/install/ApkRestore.kt

@@ -7,6 +7,7 @@ package com.stevesoltys.seedvault.restore.install
 
 import android.app.backup.IBackupManager
 import android.content.Context
+import android.content.Intent
 import android.content.pm.PackageManager
 import android.content.pm.PackageManager.GET_SIGNATURES
 import android.content.pm.PackageManager.GET_SIGNING_CERTIFICATES
@@ -20,6 +21,7 @@ import com.stevesoltys.seedvault.plugins.LegacyStoragePlugin
 import com.stevesoltys.seedvault.plugins.StoragePlugin
 import com.stevesoltys.seedvault.plugins.StoragePluginManager
 import com.stevesoltys.seedvault.restore.RestorableBackup
+import com.stevesoltys.seedvault.restore.RestoreService
 import com.stevesoltys.seedvault.restore.install.ApkInstallState.FAILED
 import com.stevesoltys.seedvault.restore.install.ApkInstallState.FAILED_SYSTEM_APP
 import com.stevesoltys.seedvault.restore.install.ApkInstallState.IN_PROGRESS
@@ -85,14 +87,17 @@ internal class ApkRestore(
             return
         }
         mInstallResult.value = InstallResult(packages)
+        val i = Intent(context, RestoreService::class.java)
         val autoRestore = backupStateManager.isAutoRestoreEnabled
         try {
+            context.startForegroundService(i)
             // disable auto-restore before installing apps, if it was enabled before
             if (autoRestore) backupManager.setAutoRestore(false)
             reInstallApps(backup, packages.asIterable().reversed())
         } finally {
             // re-enable auto-restore, if it was enabled before
             if (autoRestore) backupManager.setAutoRestore(true)
+            context.stopService(i)
         }
         mInstallResult.update { it.copy(isFinished = true) }
     }

app/src/main/java/com/stevesoltys/seedvault/ui/notification/BackupNotificationManager.kt

@@ -38,14 +38,16 @@ import kotlin.math.min
 private const val CHANNEL_ID_OBSERVER = "NotificationBackupObserver"
 private const val CHANNEL_ID_SUCCESS = "NotificationBackupSuccess"
 private const val CHANNEL_ID_ERROR = "NotificationError"
+private const val CHANNEL_ID_RESTORE = "NotificationRestore"
 private const val CHANNEL_ID_RESTORE_ERROR = "NotificationRestoreError"
 internal const val NOTIFICATION_ID_OBSERVER = 1
 private const val NOTIFICATION_ID_SUCCESS = 2
 private const val NOTIFICATION_ID_ERROR = 3
 private const val NOTIFICATION_ID_SPACE_ERROR = 4
-private const val NOTIFICATION_ID_RESTORE_ERROR = 5
+internal const val NOTIFICATION_ID_RESTORE = 5
-private const val NOTIFICATION_ID_BACKGROUND = 6
+private const val NOTIFICATION_ID_RESTORE_ERROR = 6
-private const val NOTIFICATION_ID_NO_MAIN_KEY_ERROR = 7
+private const val NOTIFICATION_ID_BACKGROUND = 7
+private const val NOTIFICATION_ID_NO_MAIN_KEY_ERROR = 8
 
 private val TAG = BackupNotificationManager::class.java.simpleName
 
@@ -55,6 +57,7 @@ internal class BackupNotificationManager(private val context: Context) {
         createNotificationChannel(getObserverChannel())
         createNotificationChannel(getSuccessChannel())
         createNotificationChannel(getErrorChannel())
+        createNotificationChannel(getRestoreChannel())
         createNotificationChannel(getRestoreErrorChannel())
     }
 
@@ -77,6 +80,11 @@ internal class BackupNotificationManager(private val context: Context) {
         return NotificationChannel(CHANNEL_ID_ERROR, title, IMPORTANCE_DEFAULT)
     }
 
+    private fun getRestoreChannel(): NotificationChannel {
+        val title = context.getString(R.string.notification_restore_error_channel_title)
+        return NotificationChannel(CHANNEL_ID_RESTORE, title, IMPORTANCE_LOW)
+    }
+
     private fun getRestoreErrorChannel(): NotificationChannel {
         val title = context.getString(R.string.notification_restore_error_channel_title)
         return NotificationChannel(CHANNEL_ID_RESTORE_ERROR, title, IMPORTANCE_HIGH)
@@ -235,6 +243,18 @@ internal class BackupNotificationManager(private val context: Context) {
         nm.notify(NOTIFICATION_ID_SPACE_ERROR, notification)
     }
 
+    fun getRestoreNotification() = Notification.Builder(context, CHANNEL_ID_RESTORE).apply {
+        setSmallIcon(R.drawable.ic_cloud_restore)
+        setContentTitle(context.getString(R.string.notification_restore_title))
+        setOngoing(true)
+        setShowWhen(false)
+        setWhen(System.currentTimeMillis())
+    }.build()
+
+    fun cancelRestoreNotification() {
+        nm.cancel(NOTIFICATION_ID_RESTORE)
+    }
+
     @SuppressLint("RestrictedApi")
     fun onRemovableStorageNotAvailableForRestore(packageName: String, storageName: String) {
         val appName = try {

app/src/main/res/values/strings.xml

@@ -169,6 +169,9 @@
     <string name="notification_space_error_title">Insufficient backup space</string>
     <string name="notification_space_error_text">Your backup location is running out of space. Free up space, so backups can run.</string>
 
+    <string name="notification_restore_channel_title">Restore notification</string>
+    <string name="notification_restore_title">Restore running</string>
+
     <string name="notification_restore_error_channel_title">Auto restore flash drive error</string>
     <string name="notification_restore_error_title">Could not restore data for %1$s</string>
     <string name="notification_restore_error_text">Plug in your %1$s before installing the app to restore its data from backup.</string>

app/src/test/java/com/stevesoltys/seedvault/restore/install/ApkBackupRestoreTest.kt

@@ -6,6 +6,7 @@
 package com.stevesoltys.seedvault.restore.install
 
 import android.app.backup.IBackupManager
+import android.content.ComponentName
 import android.content.Context
 import android.content.pm.PackageManager
 import android.content.pm.PackageManager.NameNotFoundException
@@ -127,6 +128,13 @@ internal class ApkBackupRestoreTest : TransportTest() {
             writeBytes(splitBytes)
         }.absolutePath)
 
+        // related to starting/stopping service
+        every { strictContext.packageName } returns "org.foo.bar"
+        every {
+            strictContext.startForegroundService(any())
+        } returns ComponentName(strictContext, "org.foo.bar.Class")
+        every { strictContext.stopService(any()) } returns true
+
         every { settingsManager.isBackupEnabled(any()) } returns true
         every { settingsManager.backupApks() } returns true
         every { sigInfo.hasMultipleSigners() } returns false

app/src/test/java/com/stevesoltys/seedvault/restore/install/ApkRestoreTest.kt

@@ -6,6 +6,7 @@
 package com.stevesoltys.seedvault.restore.install
 
 import android.app.backup.IBackupManager
+import android.content.ComponentName
 import android.content.Context
 import android.content.pm.ApplicationInfo.FLAG_INSTALLED
 import android.content.pm.ApplicationInfo.FLAG_SYSTEM
@@ -107,6 +108,13 @@ internal class ApkRestoreTest : TransportTest() {
         packageInfo.signingInfo = mockk(relaxed = true)
 
         every { storagePluginManager.appPlugin } returns storagePlugin
+
+        // related to starting/stopping service
+        every { strictContext.packageName } returns "org.foo.bar"
+        every {
+            strictContext.startForegroundService(any())
+        } returns ComponentName(strictContext, "org.foo.bar.Class")
+        every { strictContext.stopService(any()) } returns true
     }
 
     @Test