settings page

lib/foundation/appdata.dart

@@ -1,5 +1,6 @@
 import 'dart:convert';
 
+import 'package:path_provider/path_provider.dart';
 import 'package:venera/foundation/app.dart';
 import 'package:venera/utils/io.dart';
 
@@ -9,9 +10,9 @@ class _Appdata {
   var searchHistory = <String>[];
 
   bool _isSavingData = false;
-  
+
   Future<void> saveData() async {
-    if(_isSavingData) {
+    if (_isSavingData) {
       await Future.doWhile(() async {
         await Future.delayed(const Duration(milliseconds: 20));
         return _isSavingData;
@@ -25,11 +26,11 @@ class _Appdata {
   }
 
   void addSearchHistory(String keyword) {
-    if(searchHistory.contains(keyword)) {
+    if (searchHistory.contains(keyword)) {
       searchHistory.remove(keyword);
     }
     searchHistory.insert(0, keyword);
-    if(searchHistory.length > 50) {
+    if (searchHistory.length > 50) {
       searchHistory.removeLast();
     }
     saveData();
@@ -46,13 +47,16 @@ class _Appdata {
   }
 
   Future<void> init() async {
-    var file = File(FilePath.join(App.dataPath, 'appdata.json'));
-    if(!await file.exists()) {
+    var file = File(FilePath.join(
+      (await getApplicationSupportDirectory()).path,
+      'appdata.json',
+    ));
+    if (!await file.exists()) {
       return;
     }
     var json = jsonDecode(await file.readAsString());
-    for(var key in (json['settings'] as Map<String, dynamic>).keys) {
-      if(json['settings'][key] != null) {
+    for (var key in (json['settings'] as Map<String, dynamic>).keys) {
+      if (json['settings'][key] != null) {
         settings[key] = json['settings'][key];
       }
     }
@@ -74,7 +78,7 @@ class _Settings {
 
   final _data = <String, dynamic>{
     'comicDisplayMode': 'detailed', // detailed, brief
-    'comicTileScale': 1.0, // 0.8-1.2
+    'comicTileScale': 1.00, // 0.75-1.25
     'color': 'blue', // red, pink, purple, green, orange, blue
     'theme_mode': 'system', // light, dark, system
     'newFavoriteAddTo': 'end', // start, end
@@ -91,13 +95,14 @@ class _Settings {
     'readerMode': 'galleryLeftToRight', // values of [ReaderMode]
     'enableTapToTurnPages': true,
     'enablePageAnimation': true,
+    'language': 'system', // system, zh-CN, zh-TW, en-US
   };
 
-  operator[](String key) {
+  operator [](String key) {
     return _data[key];
   }
 
-  operator[]=(String key, dynamic value) {
+  operator []=(String key, dynamic value) {
     _data[key] = value;
   }
 
@@ -105,4 +110,4 @@ class _Settings {
   String toString() {
     return _data.toString();
   }
-}
+}

lib/foundation/local.dart

@@ -100,6 +100,29 @@ class LocalManager with ChangeNotifier {
 
   late String path;
 
+  // return error message if failed
+  Future<String?> setNewPath(String newPath) async {
+    var newDir = Directory(newPath);
+    if(!await newDir.exists()) {
+      return "Directory does not exist";
+    }
+    if(!await newDir.list().isEmpty) {
+      return "Directory is not empty";
+    }
+    try {
+      await copyDirectory(
+        Directory(path),
+        newDir,
+      );
+      await File(FilePath.join(App.dataPath, 'local_path')).writeAsString(path);
+    } catch (e) {
+      return e.toString();
+    }
+    await Directory(path).deleteIgnoreError();
+    path = newPath;
+    return null;
+  }
+
   Future<void> init() async {
     _db = sqlite3.open(
       '${App.dataPath}/local.db',
@@ -118,18 +141,18 @@ class LocalManager with ChangeNotifier {
         PRIMARY KEY (id, comic_type)
       );
     ''');
-    if (File('${App.dataPath}/local_path').existsSync()) {
-      path = File('${App.dataPath}/local_path').readAsStringSync();
+    if (File(FilePath.join(App.dataPath, 'local_path')).existsSync()) {
+      path = File(FilePath.join(App.dataPath, 'local_path')).readAsStringSync();
     } else {
       if (App.isAndroid) {
         var external = await getExternalStorageDirectories();
         if (external != null && external.isNotEmpty) {
-          path = '${external.first.path}/local';
+          path = FilePath.join(external.first.path, 'local_path');
         } else {
-          path = '${App.dataPath}/local';
+          path = FilePath.join(App.dataPath, 'local_path');
         }
       } else {
-        path = '${App.dataPath}/local';
+        path = FilePath.join(App.dataPath, 'local_path');
       }
     }
     if (!Directory(path).existsSync()) {