Implement settings

flutter/lib/state/app_theme.dart

@@ -1,16 +1,87 @@
 import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:simplecloudnotifier/state/globals.dart';
+
+enum ThemeColor {
+  Pink(displayStr: 'Pink', key: 'PINK', value: Colors.pink),
+  Red(displayStr: 'Red', key: 'RED', value: Colors.red),
+  DeepOrange(displayStr: 'Deep-Orange', key: 'DEEPORANGE', value: Colors.deepOrange),
+  Orange(displayStr: 'Orange', key: 'ORANGE', value: Colors.orange),
+  Amber(displayStr: 'Amber', key: 'AMBER', value: Colors.amber),
+  Yellow(displayStr: 'Yellow', key: 'YELLOW', value: Colors.yellow),
+  Lime(displayStr: 'Lime', key: 'LIME', value: Colors.lime),
+  LightGreen(displayStr: 'Light-Green', key: 'LIGHTGREEN', value: Colors.lightGreen),
+  Green(displayStr: 'Green', key: 'GREEN', value: Colors.green),
+  Teal(displayStr: 'Teal', key: 'TEAL', value: Colors.teal),
+  Cyan(displayStr: 'Cyan', key: 'CYAN', value: Colors.cyan),
+  LightBlue(displayStr: 'Light-Blue', key: 'LIGHTBLUE', value: Colors.lightBlue),
+  Blue(displayStr: 'Blue', key: 'BLUE', value: Colors.blue),
+  Indigo(displayStr: 'Indigo', key: 'INDIGO', value: Colors.indigo),
+  Purple(displayStr: 'Purple', key: 'PURPLE', value: Colors.purple),
+  DeepPurple(displayStr: 'Deep-Purple', key: 'DEEPPURPLE', value: Colors.deepPurple),
+  BlueGrey(displayStr: 'Blue-Grey', key: 'BLUEGREY', value: Colors.blueGrey),
+  Brown(displayStr: 'Brown', key: 'BROWN', value: Colors.brown),
+  Grey(displayStr: 'Grey', key: 'GREY', value: Colors.grey);
+
+  const ThemeColor({required this.displayStr, required this.key, required this.value});
+
+  final String displayStr;
+  final String key;
+  final Color value;
+
+  @override
+  toString() => displayStr;
+
+  static ThemeColor? parse(String? string) {
+    if (string == null) return null;
+    return values.firstWhere((e) => e.key == string, orElse: null);
+  }
+}
 
 class AppTheme extends ChangeNotifier {
+  static AppTheme? _singleton = AppTheme._internal();
+
+  factory AppTheme() {
+    return _singleton ?? (_singleton = AppTheme._internal());
+  }
+
+  AppTheme._internal() {}
+
+  // --------------------------------------------------------------------------
+
   bool _darkmode = false;
   bool get darkMode => _darkmode;
 
+  ThemeColor _color = ThemeColor.Blue;
+  ThemeColor get color => _color;
+
   void setDarkMode(bool v) {
     _darkmode = v;
     notifyListeners();
+    save();
   }
 
   void switchDarkMode() {
     _darkmode = !_darkmode;
     notifyListeners();
+    save();
+  }
+
+  void setColor(ThemeColor v) {
+    _color = v;
+    notifyListeners();
+    save();
+  }
+
+  // --------------------------------------------------------------------------
+
+  void load() {
+    _darkmode = Globals().sharedPrefs.getBool('theme.dark') ?? _darkmode;
+    _color = ThemeColor.parse(Globals().sharedPrefs.getString('theme.color')) ?? _color;
+  }
+
+  Future<void> save() async {
+    await Globals().sharedPrefs.setBool('theme.dark', _darkmode);
+    await Globals().sharedPrefs.setString('theme.color', _color.key);
   }
 }