Add setting for timezone

lib/main.dart

@@ -17,8 +17,10 @@ import 'package:info_tren/pages/train_info_page/view_train/train_info.dart';
 import 'package:info_tren/pages/train_info_page/select_train/select_train.dart';
 import 'package:info_tren/providers.dart';
 import 'package:shared_preferences/shared_preferences.dart';
+import 'package:timezone/data/latest.dart';
 
 void main() async {
+  initializeTimeZones();
   final sharedPreferences = await SharedPreferences.getInstance();
   runApp(
     ProviderScope(

lib/models.dart

@@ -7,6 +7,7 @@ export 'package:info_tren/models/stations_result.dart';
 export 'package:info_tren/models/train_data.dart' hide State;
 export 'package:info_tren/models/trains_result.dart';
 export 'package:info_tren/models/ui_design.dart';
+export 'package:info_tren/models/ui_timezone.dart';
 
 import 'package:info_tren/models/train_data.dart' show State;
 

lib/models/ui_timezone.dart

@@ -0,0 +1,94 @@
+import 'package:timezone/timezone.dart' as tz;
+
+enum UiTimeZoneType {
+  ro,
+  local,
+  utc,
+  iana,
+}
+
+extension UITimeZoneTypeName on UiTimeZoneType {
+  String get userInterfaceName => (const {
+    UiTimeZoneType.iana: 'Fus orar IANA',
+    UiTimeZoneType.local: 'Local',
+    UiTimeZoneType.ro: 'România',
+    UiTimeZoneType.utc: 'UTC',
+  })[this]!;
+}
+
+const Map<UiTimeZoneType, UiTimeZone Function(String)> fromSerStringConstructors = {
+  UiTimeZoneType.ro: RoUiTimeZone.fromSerString,
+  UiTimeZoneType.local: LocalUiTimeZone.fromSerString,
+  UiTimeZoneType.utc: UtcUiTimeZone.fromSerString,
+  UiTimeZoneType.iana: IanaUiTimeZone.fromSerString,
+};
+
+abstract class UiTimeZone {
+  final UiTimeZoneType type;
+
+  const UiTimeZone({required this.type});
+
+  DateTime convertDateTime(DateTime dt);
+
+  factory UiTimeZone.fromSerString(String ser) {
+    final arr = ser.split('\n');
+    return fromSerStringConstructors.map((key, value) => MapEntry(key.name, value))[arr[0]]!(ser);
+  }
+
+  String toSerString() {
+    return '${type.name}\n';
+  }
+}
+
+class RoUiTimeZone extends UiTimeZone {
+  static final roTz = tz.getLocation('Europe/Bucharest');
+
+  const RoUiTimeZone() : super(type: UiTimeZoneType.ro);
+
+  factory RoUiTimeZone.fromSerString(String ser) => const RoUiTimeZone();
+
+  @override
+  DateTime convertDateTime(DateTime dt) {
+    return tz.TZDateTime.from(dt, roTz);
+  }
+}
+
+class LocalUiTimeZone extends UiTimeZone {
+  const LocalUiTimeZone() : super(type: UiTimeZoneType.local);
+
+  factory LocalUiTimeZone.fromSerString(String ser) => LocalUiTimeZone();
+
+  @override
+  DateTime convertDateTime(DateTime dt) => dt.toLocal();
+}
+
+class UtcUiTimeZone extends UiTimeZone {
+  const UtcUiTimeZone() : super(type: UiTimeZoneType.utc);
+
+  factory UtcUiTimeZone.fromSerString(String ser) => UtcUiTimeZone();
+
+  @override
+  DateTime convertDateTime(DateTime dt) => dt.toUtc();
+}
+
+class IanaUiTimeZone extends UiTimeZone {
+  late final tz.Location location;
+
+  IanaUiTimeZone({required String ianaName}): super(type: UiTimeZoneType.iana) {
+    location = tz.getLocation(ianaName);
+  }
+
+  factory IanaUiTimeZone.fromSerString(String ser) => IanaUiTimeZone(
+    ianaName: ser.split('\n').skip(1).join('\n'),
+  );
+
+  @override
+  DateTime convertDateTime(DateTime dt) {
+    return tz.TZDateTime.from(dt, location);
+  }
+
+  @override
+  String toSerString() {
+    return '${type.name}\n${location.name}';
+  }
+}

lib/pages/settings/setings_page.dart

@@ -31,6 +31,7 @@ class SettingsPage extends ConsumerWidget {
 abstract class SettingsPageShared extends StatelessWidget {
   final String pageTitle = 'Setări';
   final String appearanceTitle = 'Aspect';
+  final String timeZoneTitle = 'Fus orar';
 
   const SettingsPageShared({super.key});
 

lib/pages/settings/settings_page_cupertino.dart

@@ -67,6 +67,26 @@ class SettingsPageCupertino extends SettingsPageShared {
                     );
                   },
                 ),
+                Consumer(
+                  builder: (context, ref, _) {
+                    final currentTZ = ref.watch(uiTimeZoneProvider);
+                    return CupertinoListTile(
+                      title: Text(timeZoneTitle),
+                      trailing: Text(currentTZ.type.userInterfaceName),
+                      onTap: () async {
+                        final choice = await singleChoice(
+                          context: context,
+                          choices: UiTimeZoneType.values.where((tz) => tz != UiTimeZoneType.iana).toList(),
+                          labelBuilder: (UiTimeZoneType utzt) => utzt.userInterfaceName,
+                          title: timeZoneTitle,
+                        );
+                        if (choice != null) {
+                          ref.read(uiTimeZoneProvider.notifier).set(UiTimeZone.fromSerString('${choice.name}\n'));
+                        }
+                      },
+                    );
+                  },
+                ),
               ],
             ),
           );

lib/pages/settings/settings_page_fluent.dart

@@ -34,6 +34,29 @@ class SettingsPageFluent extends SettingsPageShared {
                 );
               },
             ),
+            Consumer(
+              builder: (context, ref, _) {
+                final currentTZ = ref.watch(uiTimeZoneProvider);
+                return ListTile(
+                  title: Text(timeZoneTitle),
+                  trailing: ComboBox<UiTimeZoneType>(
+                    items: UiTimeZoneType.values.where((tz) => tz != UiTimeZoneType.iana).map((tzt) => ComboBoxItem(
+                      value: tzt,
+                      child: Text(tzt.userInterfaceName),
+                    )).toList(),
+                    value: currentTZ.type,
+                    onChanged: (newTZ) {
+                      if (newTZ != null) {
+                        ref.read(uiTimeZoneProvider.notifier).set(UiTimeZone.fromSerString('${newTZ.name}\n'));
+                      }
+                      else {
+                        ref.read(uiTimeZoneProvider.notifier).set(null);
+                      }
+                    },
+                  ),
+                );
+              },
+            ),
           ],
         ),
       ),

lib/pages/settings/settings_page_material.dart

@@ -35,6 +35,29 @@ class SettingsPageMaterial extends SettingsPageShared {
                 );
               },
             ),
+            Consumer(
+              builder: (context, ref, _) {
+                final currentTZ = ref.watch(uiTimeZoneProvider);
+                return ListTile(
+                  title: Text(timeZoneTitle),
+                  trailing: DropdownButton<UiTimeZoneType>(
+                    items: UiTimeZoneType.values.where((tz) => tz != UiTimeZoneType.iana).map((tzt) => DropdownMenuItem(
+                      value: tzt,
+                      child: Text(tzt.userInterfaceName),
+                    )).toList(),
+                    value: currentTZ.type,
+                    onChanged: (newTZ) {
+                      if (newTZ != null) {
+                        ref.read(uiTimeZoneProvider.notifier).set(UiTimeZone.fromSerString('${newTZ.name}\n'));
+                      }
+                      else {
+                        ref.read(uiTimeZoneProvider.notifier).set(null);
+                      }
+                    },
+                  ),
+                );
+              },
+            ),
           ],
         ),
       ),

lib/pages/station_arrdep_page/view_station/view_station_cupertino.dart

@@ -78,7 +78,13 @@ class ViewStationPageCupertino extends ViewStationPageShared {
             ],
           ),
         ),
-        child: Text('${item.time.toLocal().hour.toString().padLeft(2, '0')}:${item.time.toLocal().minute.toString().padLeft(2, '0')}'),
+        child: Consumer(
+          builder: (context, ref, _) {
+            final tz = ref.watch(uiTimeZoneProvider);
+            final time = tz.convertDateTime(item.time);
+            return Text('${time.hour.toString().padLeft(2, '0')}:${time.minute.toString().padLeft(2, '0')}');
+          },
+        ),
       ),
     );
   }
@@ -100,7 +106,13 @@ class ViewStationPageCupertino extends ViewStationPageShared {
             ],
           ),
         ),
-        child: Text('${item.time.toLocal().hour.toString().padLeft(2, '0')}:${item.time.toLocal().minute.toString().padLeft(2, '0')}'),
+        child: Consumer(
+          builder: (context, ref, _) {
+            final tz = ref.watch(uiTimeZoneProvider);
+            final time = tz.convertDateTime(item.time);
+            return Text('${time.hour.toString().padLeft(2, '0')}:${time.minute.toString().padLeft(2, '0')}');
+          },
+        ),
       ),
     );
   }

lib/pages/station_arrdep_page/view_station/view_station_fluent.dart

@@ -142,24 +142,31 @@ class ViewStationPageFluent extends ViewStationPageShared {
                   mainAxisSize: MainAxisSize.min,
                   crossAxisAlignment: CrossAxisAlignment.center,
                   children: [
-                    Text(
-                      '${item.time.toLocal().hour.toString().padLeft(2, '0')}:${item.time.toLocal().minute.toString().padLeft(2, '0')}',
-                      style: TextStyle(
-                        inherit: true,
-                        fontFeatures: const [
-                          FontFeature.tabularFigures(),
-                        ],
-                        decoration: item.status.cancelled || item.status.delay != 0 ? TextDecoration.lineThrough : null,
-                        fontSize: item.status.delay != 0 ? 12 : null,
-                      ),
+                    Consumer(
+                      builder: (context, ref, _) {
+                        final tz = ref.watch(uiTimeZoneProvider);
+                        final time = tz.convertDateTime(item.time);
+                        return Text(
+                          '${time.hour.toString().padLeft(2, '0')}:${time.minute.toString().padLeft(2, '0')}',
+                          style: TextStyle(
+                            inherit: true,
+                            fontFeatures: const [
+                              FontFeature.tabularFigures(),
+                            ],
+                            decoration: item.status.cancelled || item.status.delay != 0 ? TextDecoration.lineThrough : null,
+                            fontSize: item.status.delay != 0 ? 12 : null,
+                          ),
+                        );
+                      },
                     ),
-                    if (item.status.delay != 0) Builder(
-                      builder: (context) {
-                        final newTime = item.time.add(Duration(minutes: item.status.delay));
+                    if (item.status.delay != 0) Consumer(
+                      builder: (context, ref, _) {
+                        final tz = ref.watch(uiTimeZoneProvider);
+                        final newTime = tz.convertDateTime(item.time.add(Duration(minutes: item.status.delay)));
                         final delay = item.status.delay > 0;
 
                         return Text(
-                          '${newTime.toLocal().hour.toString().padLeft(2, '0')}:${newTime.toLocal().minute.toString().padLeft(2, '0')}',
+                          '${newTime.hour.toString().padLeft(2, '0')}:${newTime.minute.toString().padLeft(2, '0')}',
                           style: TextStyle(
                             inherit: true,
                             fontFeatures: const [

lib/pages/station_arrdep_page/view_station/view_station_material.dart

@@ -107,24 +107,31 @@ class ViewStationPageMaterial extends ViewStationPageShared {
                 mainAxisSize: MainAxisSize.min,
                 crossAxisAlignment: CrossAxisAlignment.center,
                 children: [
-                  Text(
-                    '${item.time.toLocal().hour.toString().padLeft(2, '0')}:${item.time.toLocal().minute.toString().padLeft(2, '0')}',
-                    style: TextStyle(
-                      inherit: true,
-                      fontFeatures: const [
-                        FontFeature.tabularFigures(),
-                      ],
-                      decoration: item.status.cancelled || item.status.delay != 0 ? TextDecoration.lineThrough : null,
-                      fontSize: item.status.delay != 0 ? 12 : null,
-                    ),
+                  Consumer(
+                    builder: (context, ref, _) {
+                      final tz = ref.watch(uiTimeZoneProvider);
+                      final time = tz.convertDateTime(item.time);
+                      return Text(
+                        '${time.hour.toString().padLeft(2, '0')}:${time.minute.toString().padLeft(2, '0')}',
+                        style: TextStyle(
+                          inherit: true,
+                          fontFeatures: const [
+                            FontFeature.tabularFigures(),
+                          ],
+                          decoration: item.status.cancelled || item.status.delay != 0 ? TextDecoration.lineThrough : null,
+                          fontSize: item.status.delay != 0 ? 12 : null,
+                        ),
+                      );
+                    },
                   ),
-                  if (item.status.delay != 0) Builder(
-                    builder: (context) {
-                      final newTime = item.time.add(Duration(minutes: item.status.delay));
+                  if (item.status.delay != 0) Consumer(
+                    builder: (context, ref, _) {
+                      final tz = ref.watch(uiTimeZoneProvider);
+                      final newTime = tz.convertDateTime(item.time.add(Duration(minutes: item.status.delay)));
                       final delay = item.status.delay > 0;
 
                       return Text(
-                        '${newTime.toLocal().hour.toString().padLeft(2, '0')}:${newTime.toLocal().minute.toString().padLeft(2, '0')}',
+                        '${newTime.hour.toString().padLeft(2, '0')}:${newTime.minute.toString().padLeft(2, '0')}',
                         style: TextStyle(
                           inherit: true,
                           fontFeatures: const [

lib/pages/train_info_page/view_train/train_info_cupertino_DisplayTrainStation.dart

@@ -1,6 +1,8 @@
 import 'package:flutter/cupertino.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:info_tren/components/badge/badge.dart';
 import 'package:info_tren/models.dart';
+import 'package:info_tren/providers.dart';
 
 class DisplayTrainStation extends StatelessWidget {
   final Station station;
@@ -156,7 +158,7 @@ class Time extends StatelessWidget {
   }
 }
 
-class ArrivalTime extends StatelessWidget {
+class ArrivalTime extends ConsumerWidget {
   final Station station;
   final bool finalStation;
 
@@ -167,7 +169,9 @@ class ArrivalTime extends StatelessWidget {
   });
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final tz = ref.watch(uiTimeZoneProvider);
+
     if (finalStation) {
       return Row(
         crossAxisAlignment: CrossAxisAlignment.center,
@@ -187,7 +191,7 @@ class ArrivalTime extends StatelessWidget {
     }
     else {
       final delay = station.arrival!.status?.delay ?? 0;
-      final time = station.arrival!.scheduleTime.toLocal();
+      final time = tz.convertDateTime(station.arrival!.scheduleTime);
 
       if (delay == 0) {
         return Text("${time.hour.toString().padLeft(2, "0")}:${time.minute.toString().padLeft(2, "0")}");
@@ -291,7 +295,7 @@ class StopTime extends StatelessWidget {
   }
 }
 
-class DepartureTime extends StatelessWidget {
+class DepartureTime extends ConsumerWidget {
   final Station station;
   final bool firstStation;
 
@@ -302,7 +306,8 @@ class DepartureTime extends StatelessWidget {
   });
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final tz = ref.watch(uiTimeZoneProvider);
     if (firstStation) {
       return Row(
         crossAxisAlignment: CrossAxisAlignment.center,
@@ -322,7 +327,7 @@ class DepartureTime extends StatelessWidget {
     }
     else {
       final delay = station.departure!.status?.delay ?? 0;
-      final time = station.departure!.scheduleTime.toLocal();
+      final time = tz.convertDateTime(station.departure!.scheduleTime);
 
       if (delay == 0) {
         return Text("${time.hour.toString().padLeft(2, "0")}:${time.minute.toString().padLeft(2, "0")}");

lib/pages/train_info_page/view_train/train_info_fluent_DisplayTrainStation.dart

@@ -1,6 +1,8 @@
 import 'package:fluent_ui/fluent_ui.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:info_tren/components/badge/badge.dart';
 import 'package:info_tren/models.dart';
+import 'package:info_tren/providers.dart';
 
 class DisplayTrainStation extends StatelessWidget {
   final Station station;
@@ -170,7 +172,7 @@ class Time extends StatelessWidget {
   }
 }
 
-class ArrivalTime extends StatelessWidget {
+class ArrivalTime extends ConsumerWidget {
   final Station station;
   final bool finalStation;
 
@@ -181,7 +183,8 @@ class ArrivalTime extends StatelessWidget {
   });
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final tz = ref.watch(uiTimeZoneProvider);
     if (station.arrival == null) {
       return Container();
     }
@@ -204,7 +207,7 @@ class ArrivalTime extends StatelessWidget {
     }
     else {
       final delay = station.arrival!.status?.delay ?? 0;
-      final time = station.arrival!.scheduleTime.toLocal();
+      final time = tz.convertDateTime(station.arrival!.scheduleTime);
 
       if (delay == 0) {
         return Text("${time.hour.toString().padLeft(2, '0')}:${time.minute.toString().padLeft(2, '0')}");
@@ -309,7 +312,7 @@ class StopTime extends StatelessWidget {
   }
 }
 
-class DepartureTime extends StatelessWidget {
+class DepartureTime extends ConsumerWidget {
   final Station station;
   final bool firstStation;
 
@@ -320,7 +323,8 @@ class DepartureTime extends StatelessWidget {
   });
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final tz = ref.watch(uiTimeZoneProvider);
     if (station.departure == null) {
       return Container();
     }
@@ -343,7 +347,7 @@ class DepartureTime extends StatelessWidget {
     }
     else {
       final delay = station.departure!.status?.delay ?? 0;
-      final time = station.departure!.scheduleTime.toLocal();
+      final time = tz.convertDateTime(station.departure!.scheduleTime);
 
       if (delay == 0) {
         return Text("${time.hour.toString().padLeft(2, '0')}:${time.minute.toString().padLeft(2, '0')}");

lib/pages/train_info_page/view_train/train_info_material_DisplayTrainStation.dart

@@ -1,7 +1,9 @@
 import 'package:flutter/material.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:info_tren/models.dart';
 import 'package:info_tren/components/badge/badge.dart';
 import 'package:info_tren/pages/train_info_page/view_train/train_info_material.dart';
+import 'package:info_tren/providers.dart';
 
 class DisplayTrainStation extends StatelessWidget {
   final Station station;
@@ -168,7 +170,7 @@ class Time extends StatelessWidget {
   }
 }
 
-class ArrivalTime extends StatelessWidget {
+class ArrivalTime extends ConsumerWidget {
   final Station station;
   final bool finalStation;
 
@@ -179,7 +181,8 @@ class ArrivalTime extends StatelessWidget {
   });
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final tz = ref.watch(uiTimeZoneProvider);
     if (station.arrival == null) {
       return Container();
     }
@@ -202,7 +205,7 @@ class ArrivalTime extends StatelessWidget {
     }
     else {
       final delay = station.arrival!.status?.delay ?? 0;
-      final time = station.arrival!.scheduleTime.toLocal();
+      final time = tz.convertDateTime(station.arrival!.scheduleTime);
 
       if (delay == 0) {
         return Text("${time.hour.toString().padLeft(2, '0')}:${time.minute.toString().padLeft(2, '0')}");
@@ -305,7 +308,7 @@ class StopTime extends StatelessWidget {
   }
 }
 
-class DepartureTime extends StatelessWidget {
+class DepartureTime extends ConsumerWidget {
   final Station station;
   final bool firstStation;
 
@@ -316,7 +319,8 @@ class DepartureTime extends StatelessWidget {
   });
 
   @override
-  Widget build(BuildContext context) {
+  Widget build(BuildContext context, WidgetRef ref) {
+    final tz = ref.watch(uiTimeZoneProvider);
     if (station.departure == null) {
       return Container();
     }
@@ -339,7 +343,7 @@ class DepartureTime extends StatelessWidget {
     }
     else {
       final delay = station.departure!.status?.delay ?? 0;
-      final time = station.departure!.scheduleTime.toLocal();
+      final time = tz.convertDateTime(station.departure!.scheduleTime);
 
       if (delay == 0) {
         return Text("${time.hour.toString().padLeft(2, '0')}:${time.minute.toString().padLeft(2, '0')}");

lib/providers.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:developer';
 
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:info_tren/api/station_data.dart';
@@ -36,6 +37,39 @@ final uiDesignProvider = StateNotifierProvider<UiDesignNotifier, UiDesign>(
   (ref) => UiDesignNotifier(
     sharedPreferences: ref.watch(sharedPreferencesProvider),
   ),
+  dependencies: [sharedPreferencesProvider],
+);
+
+class UiTimeZoneNotifier extends StateNotifier<UiTimeZone> {
+  final SharedPreferences sharedPreferences;
+
+  UiTimeZoneNotifier({required this.sharedPreferences,}) : super(const RoUiTimeZone()) {
+    final stored = sharedPreferences.getString('uiTimeZone');
+    if (stored != null) {
+      try {
+        state = UiTimeZone.fromSerString(stored);
+      }
+      catch (e) {
+        log('Invalid UiTimeZone ser: $stored, error: $e', level: 1000);
+      }
+    }
+  }
+
+  void set(UiTimeZone? timeZone) async {
+    if (timeZone != null) {
+      await sharedPreferences.setString('uiTimeZone', timeZone.toSerString());
+    }
+    else {
+      await sharedPreferences.remove('uiTimeZone');
+    }
+    state = timeZone ?? const LocalUiTimeZone();
+  }
+}
+final uiTimeZoneProvider = StateNotifierProvider<UiTimeZoneNotifier, UiTimeZone>(
+  (ref) => UiTimeZoneNotifier(
+    sharedPreferences: ref.watch(sharedPreferencesProvider),
+  ),
+  dependencies: [sharedPreferencesProvider],
 );
 
 final trainInfoArgumentsProvider = Provider<TrainInfoArguments>(

pubspec.lock

@@ -616,6 +616,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.2.1"
+  timezone:
+    dependency: "direct main"
+    description:
+      name: timezone
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.9.0"
   timing:
     dependency: transitive
     description:

pubspec.yaml

@@ -34,6 +34,7 @@ dependencies:
   json_annotation: ^4.7.0
   shared_preferences: ^2.0.15
   fluent_ui: ^4.0.3+1
+  timezone: ^0.9.0
 
 dev_dependencies:
   # flutter_test: