Add ability to set custom data application directory

cw_core/lib/pathForWallet.dart

@@ -1,10 +1,11 @@
 import 'dart:io';
+import 'package:cw_core/root_dir.dart';
 import 'package:cw_core/wallet_type.dart';
 import 'package:flutter/foundation.dart';
 import 'package:path_provider/path_provider.dart';
 
 Future<String> pathForWalletDir({required String name, required  WalletType type}) async {
-  final root = await getApplicationDocumentsDirectory();
+  final root = await getAppDir();
   final prefix = walletTypeToString(type).toLowerCase();
   final walletsDir = Directory('${root.path}/wallets');
   final walletDire = Directory('${walletsDir.path}/$prefix/$name');
@@ -21,7 +22,7 @@ Future<String> pathForWallet({required String name, required WalletType type}) a
         .then((path) => path + '/$name');
 
 Future<String> outdatedAndroidPathForWalletDir({required String name}) async {
-  final directory = await getApplicationDocumentsDirectory();
+  final directory = await getAppDir();
   final pathDir = directory.path + '/$name';
 
   return pathDir;

cw_core/lib/root_dir.dart

@@ -0,0 +1,26 @@
+import 'dart:io';
+import 'package:path_provider/path_provider.dart';
+
+String? _rootDirPath;
+
+void setRootDirFromEnv()
+	=> _rootDirPath = Platform.environment['CAKE_WALLET_DIR'];
+
+Future<Directory> getAppDir({String appName = 'cake_wallet'}) async {
+	Directory dir;
+
+	if (_rootDirPath != null && _rootDirPath!.isNotEmpty) {
+		dir = Directory.fromUri(Uri.file(_rootDirPath!));
+		dir.create(recursive: true);
+	} else {
+		dir = await getApplicationDocumentsDirectory();
+
+		if (Platform.isLinux) {
+			final appDirPath = '${dir.path}/$appName';
+			dir = Directory.fromUri(Uri.file(appDirPath));
+			await dir.create(recursive: true);
+		}
+	}
+
+	return dir;
+}

lib/core/backup_service.dart

@@ -1,6 +1,7 @@
 import 'dart:convert';
 import 'dart:io';
 import 'dart:typed_data';
+import 'package:cw_core/root_dir.dart';
 import 'package:cw_core/wallet_type.dart';
 import 'package:flutter/foundation.dart';
 import 'package:hive/hive.dart';
@@ -73,7 +74,7 @@ class BackupService {
 
   Future<Uint8List> _exportBackupV2(String password) async {
     final zipEncoder = ZipFileEncoder();
-    final appDir = await getApplicationDocumentsDirectory();
+    final appDir = await getAppDir();
     final now = DateTime.now();
     final tmpDir = Directory('${appDir.path}/~_BACKUP_TMP');
     final archivePath = '${tmpDir.path}/backup_${now.toString()}.zip';
@@ -114,7 +115,7 @@ class BackupService {
 
   Future<void> _importBackupV1(Uint8List data, String password,
       {required String nonce}) async {
-    final appDir = await getApplicationDocumentsDirectory();
+    final appDir = await getAppDir();
     final decryptedData = await _decryptV1(data, password, nonce);
     final zip = ZipDecoder().decodeBytes(decryptedData);
 
@@ -137,7 +138,7 @@ class BackupService {
   }
 
   Future<void> _importBackupV2(Uint8List data, String password) async {
-    final appDir = await getApplicationDocumentsDirectory();
+    final appDir = await getAppDir();
     final decryptedData = await _decryptV2(data, password);
     final zip = ZipDecoder().decodeBytes(decryptedData);
 
@@ -172,7 +173,7 @@ class BackupService {
   }
 
   Future<Box<WalletInfo>> _reloadHiveWalletInfoBox() async {
-    final appDir = await getApplicationDocumentsDirectory();
+    final appDir = await getAppDir();
     await Hive.close();
     Hive.init(appDir.path);
 
@@ -184,7 +185,7 @@ class BackupService {
   }
 
   Future<void> _importPreferencesDump() async {
-    final appDir = await getApplicationDocumentsDirectory();
+    final appDir = await getAppDir();
     final preferencesFile = File('${appDir.path}/~_preferences_dump');
 
     if (!preferencesFile.existsSync()) {
@@ -303,7 +304,7 @@ class BackupService {
   Future<void> _importKeychainDumpV1(String password,
       {required String nonce,
       String keychainSalt = secrets.backupKeychainSalt}) async {
-    final appDir = await getApplicationDocumentsDirectory();
+    final appDir = await getAppDir();
     final keychainDumpFile = File('${appDir.path}/~_keychain_dump');
     final decryptedKeychainDumpFileData = await _decryptV1(
         keychainDumpFile.readAsBytesSync(), '$keychainSalt$password', nonce);
@@ -332,7 +333,7 @@ class BackupService {
 
   Future<void> _importKeychainDumpV2(String password,
       {String keychainSalt = secrets.backupKeychainSalt}) async {
-    final appDir = await getApplicationDocumentsDirectory();
+    final appDir = await getAppDir();
     final keychainDumpFile = File('${appDir.path}/~_keychain_dump');
     final decryptedKeychainDumpFileData = await _decryptV2(
         keychainDumpFile.readAsBytesSync(), '$keychainSalt$password');

lib/main.dart

@@ -4,6 +4,7 @@ import 'package:cake_wallet/entities/language_service.dart';
 import 'package:cake_wallet/buy/order.dart';
 import 'package:cake_wallet/store/yat/yat_store.dart';
 import 'package:cake_wallet/utils/exception_handler.dart';
+import 'package:cw_core/root_dir.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -55,8 +56,8 @@ Future<void> main() async {
 
       return true;
     };
-
+    setRootDirFromEnv();
-    final appDir = await getApplicationDocumentsDirectory();
+    final appDir = await getAppDir();
     await Hive.close();
     Hive.init(appDir.path);
 

lib/utils/exception_handler.dart

@@ -6,6 +6,7 @@ import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/main.dart';
 import 'package:cake_wallet/src/widgets/alert_with_two_actions.dart';
 import 'package:cake_wallet/utils/show_pop_up.dart';
+import 'package:cw_core/root_dir.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_mailer/flutter_mailer.dart';
@@ -17,7 +18,7 @@ class ExceptionHandler {
   static const _coolDownDurationInDays = 7;
 
   static void _saveException(String? error, StackTrace? stackTrace) async {
-    final appDocDir = await getApplicationDocumentsDirectory();
+    final appDocDir = await getAppDir();
 
     final file = File('${appDocDir.path}/error.txt');
     final exception = {
@@ -38,7 +39,7 @@ class ExceptionHandler {
 
   static void _sendExceptionFile() async {
     try {
-      final appDocDir = await getApplicationDocumentsDirectory();
+      final appDocDir = await getAppDir();
 
       final file = File('${appDocDir.path}/error.txt');
 

lib/view_model/backup_view_model.dart

@@ -3,6 +3,7 @@ import 'package:cake_wallet/core/backup_service.dart';
 import 'package:cake_wallet/core/execution_state.dart';
 import 'package:cake_wallet/entities/secret_store_key.dart';
 import 'package:cake_wallet/store/secret_store.dart';
+import 'package:cw_core/root_dir.dart';
 import 'package:flutter/foundation.dart';
 import 'package:cake_wallet/core/secure_storage.dart';
 import 'package:mobx/mobx.dart';
@@ -73,7 +74,7 @@ abstract class BackupViewModelBase with Store {
   }
 
   Future<String> saveBackupFileLocally(BackupExportFile backup) async {
-    final appDir = await getApplicationDocumentsDirectory();
+    final appDir = await getAppDir();
     final path = '${appDir.path}/${backup.name}';
     final backupFile = File(path);
     await backupFile.writeAsBytes(backup.content);
@@ -81,7 +82,7 @@ abstract class BackupViewModelBase with Store {
   }
 
   Future<void> removeBackupFileLocally(BackupExportFile backup) async {
-    final appDir = await getApplicationDocumentsDirectory();
+    final appDir = await getAppDir();
     final path = '${appDir.path}/${backup.name}';
     final backupFile = File(path);
     await backupFile.delete();