2022-08-13 18:42:09 +05:30
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package com.github.libretube.util
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import android.content.Context
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import android.content.SharedPreferences
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import android.net.Uri
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import androidx.preference.PreferenceManager
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import java.io.FileInputStream
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import java.io.FileOutputStream
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import java.io.IOException
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import java.io.ObjectInputStream
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import java.io.ObjectOutputStream
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/**
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* Backup and restore the preferences
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*/
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class BackupHelper(
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private val context: Context
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) {
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/**
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* Backup the default shared preferences to a file
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*/
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fun backupSharedPreferences(uri: Uri?) {
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if (uri == null) return
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var output: ObjectOutputStream? = null
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try {
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2022-08-14 13:25:28 +05:30
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val fileDescriptor =
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context.contentResolver.openFileDescriptor(uri, "w")?.fileDescriptor
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2022-08-13 18:42:09 +05:30
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output = ObjectOutputStream(FileOutputStream(fileDescriptor))
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val pref: SharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
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// write all preference objects to the output file
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output.writeObject(pref.all)
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} catch (e: Exception) {
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e.printStackTrace()
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} finally {
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try {
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// close the outputStream
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if (output != null) {
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output.flush()
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output.close()
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}
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} catch (ex: IOException) {
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ex.printStackTrace()
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}
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}
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}
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/**
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* restore the default shared preferences from a file
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*/
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@Suppress("UNCHECKED_CAST")
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fun restoreSharedPreferences(uri: Uri?) {
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if (uri == null) return
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var input: ObjectInputStream? = null
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try {
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2022-08-14 13:25:28 +05:30
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val fileDescriptor =
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context.contentResolver.openFileDescriptor(uri, "r")?.fileDescriptor
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2022-08-13 18:42:09 +05:30
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input = ObjectInputStream(FileInputStream(fileDescriptor))
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val editor = PreferenceManager.getDefaultSharedPreferences(context).edit()
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// clear the previous settings
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editor.clear()
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// map all the preference keys and their values
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val entries = input.readObject() as Map<String, *>
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// decide for each preference which type it is and save it to the preferences
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for ((key, value) in entries) {
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if (value is Boolean) editor.putBoolean(key, value)
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else if (value is Float) editor.putFloat(key, value)
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else if (value is Int) editor.putInt(key, value)
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else if (value is Long) editor.putLong(key, value)
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else if (value is String) editor.putString(key, value)
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}
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editor.commit()
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} catch (e: Exception) {
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e.printStackTrace()
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} finally {
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try {
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if (input != null) {
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input.close()
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}
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} catch (ex: IOException) {
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ex.printStackTrace()
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}
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}
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}
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}
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