#157 new: icloud sync

lib/data/model/app/error.dart

@@ -52,3 +52,19 @@ class DockerErr extends Err<DockerErrType> {
     return 'DockerErr<$type>: $message';
   }
 }
+
+enum ICloudErrType {
+  generic,
+  notFound,
+  multipleFiles,
+}
+
+class ICloudErr extends Err<ICloudErrType> {
+  ICloudErr({required ICloudErrType type, String? message})
+      : super(from: ErrFrom.docker, type: type, message: message);
+
+  @override
+  String toString() {
+    return 'ICloudErr<$type>: $message';
+  }
+}

lib/data/model/app/json.dart

@@ -0,0 +1,7 @@
+abstract class JsonSerializable<T> {
+  /// Convert [this] to json
+  Map<String, dynamic> toJson();
+
+  /// Create [this] from json
+  T fromJson(Map<String, dynamic> json);
+}

lib/data/model/app/syncable.dart

@@ -0,0 +1,9 @@
+abstract class SyncAble<T> {
+  /// If [other] is newer than [this] then return true,
+  /// else return false
+  bool needSync(T other);
+
+  /// Merge [other] into [this],
+  /// return [this] after merge
+  T merge(T other);
+}

lib/data/res/path.dart

@@ -3,23 +3,43 @@ import 'dart:io';
 import 'package:path_provider/path_provider.dart';
 import 'package:toolbox/core/utils/platform.dart';
 
-Future<Directory> get docDir async {
+String? _docDir;
+String? _sftpDir;
+String? _fontDir;
+
+Future<String> get docDir async {
+  if (_docDir != null) {
+    return _docDir!;
+  }
   if (isAndroid) {
     final dir = await getExternalStorageDirectory();
     if (dir != null) {
-      return dir;
+      _docDir = dir.path;
+      return dir.path;
     }
     // fallthrough to getApplicationDocumentsDirectory
   }
-  return await getApplicationDocumentsDirectory();
+  final dir = await getApplicationDocumentsDirectory();
+  _docDir = dir.path;
+  return dir.path;
 }
 
-Future<Directory> get sftpDir async {
-  final dir = Directory('${(await docDir).path}/sftp');
-  return dir.create(recursive: true);
+Future<String> get sftpDir async {
+  if (_sftpDir != null) {
+    return _sftpDir!;
+  }
+  _sftpDir = '${await docDir}/sftp';
+  final dir = Directory(_sftpDir!);
+  await dir.create(recursive: true);
+  return _sftpDir!;
 }
 
-Future<Directory> get fontDir async {
-  final dir = Directory('${(await docDir).path}/font');
-  return dir.create(recursive: true);
+Future<String> get fontDir async {
+  if (_fontDir != null) {
+    return _fontDir!;
+  }
+  _fontDir = '${await docDir}/font';
+  final dir = Directory(_fontDir!);
+  await dir.create(recursive: true);
+  return _fontDir!;
 }

lib/data/store/setting.dart

@@ -198,6 +198,13 @@ class SettingStore extends PersistentStore {
     false,
   );
 
+  /// Only valid on iOS and macOS
+  late final icloudSync = StoreProperty(
+    box,
+    'icloudSync',
+    false,
+  );
+
   // Never show these settings for users
   // Guide for these settings:
   // - key should start with `_` and be shorter as possible