rule: Set default rule to Twelve Men's Morris if country is Iran

src/ui/flutter_app/lib/common/config.dart

@@ -17,6 +17,7 @@
 */
 
 import 'package:sanmill/common/constants.dart';
+import 'package:sanmill/l10n/resources.dart';
 import 'package:sanmill/mill/rule.dart';
 import 'package:sanmill/style/app_theme.dart';
 
@@ -67,10 +68,11 @@ class Config {
   static int messageColor = AppTheme.messageColor.value;
 
   // Rules
-  static int piecesCount = 9;
+  static int piecesCount = specialCountryAndRegion == "Iran" ? 12 : 9;
   static int flyPieceCount = 3;
   static int piecesAtLeastCount = 3;
-  static bool hasDiagonalLines = false;
+  static bool hasDiagonalLines =
+      specialCountryAndRegion == "Iran" ? true : false;
   static bool hasBannedLocations = false;
   static bool mayMoveInPlacingPhase = false;
   static bool isDefenderMoveFirst = false;
@@ -139,12 +141,14 @@ class Config {
         settings['MessageColor'] ?? AppTheme.messageColor.value;
 
     // Rules
-    rule.piecesCount = Config.piecesCount = settings['PiecesCount'] ?? 9;
+    rule.piecesCount = Config.piecesCount =
+        settings['PiecesCount'] ?? (specialCountryAndRegion == "Iran" ? 12 : 9);
     rule.flyPieceCount = Config.flyPieceCount = settings['FlyPieceCount'] ?? 3;
     rule.piecesAtLeastCount =
         Config.piecesAtLeastCount = settings['PiecesAtLeastCount'] ?? 3;
-    rule.hasDiagonalLines =
-        Config.hasDiagonalLines = settings['HasDiagonalLines'] ?? false;
+    rule.hasDiagonalLines = Config.hasDiagonalLines =
+        settings['HasDiagonalLines'] ??
+            (specialCountryAndRegion == "Iran" ? true : false);
     rule.hasBannedLocations =
         Config.hasBannedLocations = settings['HasBannedLocations'] ?? false;
     rule.mayMoveInPlacingPhase = Config.mayMoveInPlacingPhase =

src/ui/flutter_app/lib/engine/engine.dart

@@ -16,6 +16,7 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+import 'package:flutter/material.dart';
 import 'package:sanmill/mill/position.dart';
 
 enum EngineType {
@@ -35,7 +36,7 @@ class EngineResponse {
 }
 
 abstract class Engine {
-  Future<void> setOptions() async {}
+  Future<void> setOptions(BuildContext context) async {}
   Future<void> startup() async {}
   Future<void> shutdown() async {}
   Future<EngineResponse> search(Position? position);

src/ui/flutter_app/lib/engine/native_engine.dart

@@ -18,8 +18,10 @@
 
 import 'dart:async';
 
+import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:sanmill/common/config.dart';
+import 'package:sanmill/l10n/resources.dart';
 import 'package:sanmill/mill/position.dart';
 import 'package:sanmill/mill/types.dart';
 
@@ -131,7 +133,7 @@ class NativeEngine extends Engine {
     await send('stop');
   }
 
-  Future<void> setOptions() async {
+  Future<void> setOptions(BuildContext context) async {
     if (Config.settingsLoaded == false) {
       print("[engine] Settings is not loaded yet, now load settings...");
       await Config.loadSettings();

src/ui/flutter_app/lib/l10n/resources.dart

@@ -565,3 +565,20 @@ Bidirectionality getBidirectionality(BuildContext context) {
     return Bidirectionality.leftToRight;
   }
 }
+
+String specialCountryAndRegion = "";
+
+setSpecialCountryAndRegion(BuildContext context) {
+  Locale currentLocale = Localizations.localeOf(context);
+
+  switch (currentLocale.countryCode) {
+    case "IR":
+      specialCountryAndRegion = "Iran";
+      break;
+    default:
+      specialCountryAndRegion = "";
+      break;
+  }
+
+  print("Set Special Country and Region to $specialCountryAndRegion.");
+}

src/ui/flutter_app/lib/main.dart

@@ -126,6 +126,8 @@ class _SanmillAppState extends State<SanmillApp> {
 
   @override
   Widget build(BuildContext context) {
+    setSpecialCountryAndRegion(context);
+
     return MaterialApp(
       /// Add navigator key from Catcher.
       /// It will be used to navigate user to report page or to show dialog.

src/ui/flutter_app/lib/mill/rule.dart

@@ -16,13 +16,15 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+import 'package:sanmill/l10n/resources.dart';
+
 class Rule {
-  String name = "Nine Men's Morris";
+  String name = "Default Rule";
   String description = "";
-  int piecesCount = 9;
+  int piecesCount = specialCountryAndRegion == "Iran" ? 12 : 9;
   int flyPieceCount = 3;
   int piecesAtLeastCount = 3;
-  bool hasDiagonalLines = false;
+  bool hasDiagonalLines = specialCountryAndRegion == "Iran" ? true : false;
   bool hasBannedLocations = false;
   bool mayMoveInPlacingPhase = false;
   bool isDefenderMoveFirst = false;

src/ui/flutter_app/lib/widgets/game_page.dart

@@ -1631,7 +1631,7 @@ class _GamePageState extends State<GamePage>
   void didPush() async {
     final route = ModalRoute.of(context)!.settings.name;
     print('$tag Game Page didPush route: $route');
-    await widget.engine.setOptions();
+    await widget.engine.setOptions(context);
     if (Config.languageCode != Constants.defaultLanguageCodeName) {
       S.load(Locale(Config.languageCode));
       setState(() {});
@@ -1642,7 +1642,7 @@ class _GamePageState extends State<GamePage>
   void didPopNext() async {
     final route = ModalRoute.of(context)!.settings.name;
     print('$tag Game Page didPopNext route: $route');
-    await widget.engine.setOptions();
+    await widget.engine.setOptions(context);
     if (Config.languageCode != Constants.defaultLanguageCodeName) {
       S.load(Locale(Config.languageCode));
     }
@@ -1652,7 +1652,7 @@ class _GamePageState extends State<GamePage>
   void didPushNext() async {
     final route = ModalRoute.of(context)!.settings.name;
     print('$tag Game Page didPushNext route: $route');
-    await widget.engine.setOptions();
+    await widget.engine.setOptions(context);
     if (Config.languageCode != Constants.defaultLanguageCodeName) {
       S.load(Locale(Config.languageCode));
     }

src/ui/flutter_app/lib/widgets/rule_settings_page.dart

@@ -19,6 +19,7 @@
 import 'package:flutter/material.dart';
 import 'package:sanmill/common/config.dart';
 import 'package:sanmill/generated/l10n.dart';
+import 'package:sanmill/l10n/resources.dart';
 import 'package:sanmill/mill/rule.dart';
 import 'package:sanmill/style/app_theme.dart';
 import 'package:sanmill/widgets/settings_card.dart';
@@ -200,7 +201,8 @@ class _RuleSettingsPageState extends State<RuleSettingsPage> {
       Navigator.of(context).pop();
 
       setState(() {
-        rule.piecesCount = Config.piecesCount = piecesCount ?? 9;
+        rule.piecesCount = Config.piecesCount =
+            piecesCount ?? (specialCountryAndRegion == "Iran" ? 12 : 9);
       });
 
       print("[config] rule.piecesCount: ${rule.piecesCount}");