File Operations Notification

app/src/main/java/sushi/hardcore/droidfs/FileOperationService.kt

@@ -1,6 +1,10 @@
 package sushi.hardcore.droidfs
 
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.NotificationManager
 import android.app.Service
+import android.content.Context
 import android.content.Intent
 import android.net.Uri
 import android.os.*
@@ -13,10 +17,16 @@ import sushi.hardcore.droidfs.util.Wiper
 import java.io.File
 import java.io.FileNotFoundException
 
+
 class FileOperationService : Service() {
+    companion object {
+        const val NOTIFICATION_ID = 1
+        const val NOTIFICATION_CHANNEL_ID = "FileOperations"
+    }
 
     private val binder = LocalBinder()
     private lateinit var gocryptfsVolume: GocryptfsVolume
+    private lateinit var notificationManager: NotificationManager
 
     inner class LocalBinder : Binder() {
         fun getService(): FileOperationService = this@FileOperationService
@@ -29,6 +39,35 @@ class FileOperationService : Service() {
         return binder
     }
 
+    private fun showNotification(message: String, total: Int): Notification.Builder {
+        if (!::notificationManager.isInitialized){
+            notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        }
+        val notificationBuilder = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val channel = NotificationChannel(NOTIFICATION_CHANNEL_ID, getString(R.string.file_operations), NotificationManager.IMPORTANCE_LOW)
+            notificationManager.createNotificationChannel(channel)
+            Notification.Builder(this, NOTIFICATION_CHANNEL_ID)
+        } else {
+            Notification.Builder(this)
+        }
+        notificationBuilder.setOngoing(true)
+                .setContentTitle(getString(R.string.file_op_notification_title))
+                .setContentText(message)
+                .setSmallIcon(R.mipmap.icon_launcher)
+                .setProgress(total, 0, false)
+        notificationManager.notify(NOTIFICATION_ID, notificationBuilder.build())
+        return notificationBuilder
+    }
+
+    private fun updateNotificationProgress(notificationBuilder: Notification.Builder, progress: Int, total: Int){
+        notificationBuilder.setProgress(total, progress, false)
+        notificationManager.notify(NOTIFICATION_ID, notificationBuilder.build())
+    }
+
+    private fun cancelNotification(){
+        notificationManager.cancel(NOTIFICATION_ID)
+    }
+
     private fun copyFile(srcPath: String, dstPath: String, remoteGocryptfsVolume: GocryptfsVolume = gocryptfsVolume): Boolean {
         var success = true
         val srcHandleId = remoteGocryptfsVolume.openReadMode(srcPath)
@@ -60,55 +99,66 @@ class FileOperationService : Service() {
 
     fun copyElements(items: ArrayList<OperationFile>, remoteGocryptfsVolume: GocryptfsVolume = gocryptfsVolume, callback: (String?) -> Unit){
         Thread {
+            val notificationBuilder = showNotification(getString(R.string.file_op_copy_msg), items.size)
             var failedItem: String? = null
-            for (item in items){
+            for (i in 0 until items.size){
-                if (item.explorerElement.isDirectory){
+                if (items[i].explorerElement.isDirectory){
-                    if (!gocryptfsVolume.pathExists(item.dstPath!!)) {
+                    if (!gocryptfsVolume.pathExists(items[i].dstPath!!)) {
-                        if (!gocryptfsVolume.mkdir(item.dstPath!!)) {
+                        if (!gocryptfsVolume.mkdir(items[i].dstPath!!)) {
-                            failedItem = item.explorerElement.fullPath
+                            failedItem = items[i].explorerElement.fullPath
                         }
                     }
                 } else {
-                    if (!copyFile(item.explorerElement.fullPath, item.dstPath!!, remoteGocryptfsVolume)){
+                    if (!copyFile(items[i].explorerElement.fullPath, items[i].dstPath!!, remoteGocryptfsVolume)){
-                        failedItem = item.explorerElement.fullPath
+                        failedItem = items[i].explorerElement.fullPath
                     }
                 }
-                if (failedItem != null){
+                if (failedItem == null){
+                    updateNotificationProgress(notificationBuilder, i, items.size)
+                } else {
                     break
                 }
             }
+            cancelNotification()
             callback(failedItem)
         }.start()
     }
 
     fun moveElements(items: ArrayList<OperationFile>, callback: (String?) -> Unit){
         Thread {
+            val notificationBuilder = showNotification(getString(R.string.file_op_move_msg), items.size)
             val mergedFolders = ArrayList<String>()
             var failedItem: String? = null
-            for (item in items){
+            for (i in 0 until items.size){
-                if (item.explorerElement.isDirectory && gocryptfsVolume.pathExists(item.dstPath!!)){ //folder will be merged
+                if (items[i].explorerElement.isDirectory && gocryptfsVolume.pathExists(items[i].dstPath!!)){ //folder will be merged
-                    mergedFolders.add(item.explorerElement.fullPath)
+                    mergedFolders.add(items[i].explorerElement.fullPath)
                 } else {
-                    if (!gocryptfsVolume.rename(item.explorerElement.fullPath, item.dstPath!!)){
+                    if (!gocryptfsVolume.rename(items[i].explorerElement.fullPath, items[i].dstPath!!)){
-                        failedItem = item.explorerElement.fullPath
+                        failedItem = items[i].explorerElement.fullPath
                         break
+                    } else {
+                        updateNotificationProgress(notificationBuilder, i, items.size)
                     }
                 }
             }
             if (failedItem == null){
-                for (path in mergedFolders) {
+                for (i in 0 until mergedFolders.size) {
-                    if (!gocryptfsVolume.rmdir(path)){
+                    if (!gocryptfsVolume.rmdir(mergedFolders[i])){
-                        failedItem = path
+                        failedItem = mergedFolders[i]
                         break
+                    } else {
+                        updateNotificationProgress(notificationBuilder, items.size-(mergedFolders.size-i), items.size)
                     }
                 }
             }
+            cancelNotification()
             callback(failedItem)
         }.start()
     }
 
     fun importFilesFromUris(items: ArrayList<OperationFile>, uris: List<Uri>, callback: (String?) -> Unit){
         Thread {
+            val notificationBuilder = showNotification(getString(R.string.file_op_import_msg), items.size)
             var failedIndex = -1
             for (i in 0 until items.size) {
                 try {
@@ -118,12 +168,16 @@ class FileOperationService : Service() {
                 } catch (e: FileNotFoundException){
                     failedIndex = i
                 }
-                if (failedIndex != -1){
+                if (failedIndex == -1) {
+                    updateNotificationProgress(notificationBuilder, i, items.size)
+                } else {
+                    cancelNotification()
                     callback(uris[failedIndex].toString())
                     break
                 }
             }
             if (failedIndex == -1){
+                cancelNotification()
                 callback(null)
             }
         }.start()
@@ -131,13 +185,17 @@ class FileOperationService : Service() {
 
     fun wipeUris(uris: List<Uri>, callback: (String?) -> Unit){
         Thread {
+            val notificationBuilder = showNotification(getString(R.string.file_op_wiping_msg), uris.size)
             var errorMsg: String? = null
-            for (uri in uris) {
+            for (i in uris.indices) {
-                errorMsg = Wiper.wipe(this, uri)
+                errorMsg = Wiper.wipe(this, uris[i])
-                if (errorMsg != null) {
+                if (errorMsg == null) {
+                    updateNotificationProgress(notificationBuilder, i, uris.size)
+                } else {
                     break
                 }
             }
+            cancelNotification()
             callback(errorMsg)
         }.start()
     }
@@ -146,10 +204,10 @@ class FileOperationService : Service() {
         val outputStream = treeDocumentFile.createFile("*/*", File(srcPath).name)?.uri?.let {
             contentResolver.openOutputStream(it)
         }
-        return if (outputStream != null){
+        return if (outputStream == null) {
-            gocryptfsVolume.exportFile(srcPath, outputStream)
-        } else {
             false
+        } else {
+            gocryptfsVolume.exportFile(srcPath, outputStream)
         }
     }
 
@@ -176,17 +234,21 @@ class FileOperationService : Service() {
         Thread {
             contentResolver.takePersistableUriPermission(uri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
             DocumentFile.fromTreeUri(this, uri)?.let { treeDocumentFile ->
+                val notificationBuilder = showNotification(getString(R.string.file_op_export_msg), items.size)
                 var failedItem: String? = null
-                for (element in items) {
+                for (i in items.indices) {
-                    failedItem = if (element.isDirectory) {
+                    failedItem = if (items[i].isDirectory) {
-                        recursiveExportDirectory(element.fullPath, treeDocumentFile)
+                        recursiveExportDirectory(items[i].fullPath, treeDocumentFile)
                     } else {
-                        if (exportFileInto(element.fullPath, treeDocumentFile)) null else element.fullPath
+                        if (exportFileInto(items[i].fullPath, treeDocumentFile)) null else items[i].fullPath
                     }
-                    if (failedItem != null) {
+                    if (failedItem == null) {
+                        updateNotificationProgress(notificationBuilder, i, items.size)
+                    } else {
                         break
                     }
                 }
+                cancelNotification()
                 callback(failedItem)
             }
         }.start()

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

@@ -186,4 +186,11 @@
     <string name="hidden_volume_warning">Hidden volumes are stored in the app\'s internal storage. Other apps can\'t see these volumes without root access. However, if you uninstall DroidFS or clear data of the app, all your hidden volumes will be LOST. Be sure to make backups !</string>
     <string name="camera_perm_needed">Camera permission is needed to take photo.</string>
     <string name="choose_resolution">Choose a resolution</string>
+    <string name="file_operations">File Operations</string>
+    <string name="file_op_notification_title">File Operations running…</string>
+    <string name="file_op_copy_msg">Copying files…</string>
+    <string name="file_op_import_msg">Importing files…</string>
+    <string name="file_op_export_msg">Exporting files…</string>
+    <string name="file_op_move_msg">Moving files…</string>
+    <string name="file_op_wiping_msg">Wiping files…</string>
 </resources>