feat: bump dart version to 3.0

lib/api/selcrs_helper.dart

@@ -169,7 +169,7 @@ class SelcrsHelper {
           GeneralResponse(statusCode: 401, message: 'need to fill out form'),
         ) as Future<GeneralResponse>;
       } else {
-        return dumpError('course', text, callback) as Future<GeneralResponse?>;
+        return dumpError('course', text, callback)! as Future<GeneralResponse?>;
       }
     } on DioException catch (e) {
       if (e.type == DioExceptionType.badResponse &&
@@ -226,7 +226,7 @@ class SelcrsHelper {
         );
       }
       if (!canReLogin) {
-        return dumpError('getUserInfo', text, callback) as Future<UserInfo?>;
+        return dumpError('getUserInfo', text, callback)! as Future<UserInfo?>;
       }
       reLoginCount = 0;
       if (callback == null) {
@@ -357,7 +357,6 @@ class SelcrsHelper {
           switch (Locale(Intl.defaultLocale!).languageCode) {
             case 'en':
               title = titles[1];
-              break;
             case 'zh':
             default:
               title = titles[0];

lib/pages/bus/bus_list_page.dart

@@ -13,9 +13,9 @@ class BusListPage extends StatefulWidget {
   final Locale locale;
 
   const BusListPage({
-    Key? key,
+    super.key,
     required this.locale,
-  }) : super(key: key);
+  });
 
   @override
   _BusListPageState createState() => _BusListPageState();

lib/pages/bus/bus_time_page.dart

@@ -14,10 +14,10 @@ class BusTimePage extends StatefulWidget {
   final BusInfo busInfo;
 
   const BusTimePage({
-    Key? key,
+    super.key,
     required this.busInfo,
     required this.locale,
-  }) : super(key: key);
+  });
 
   @override
   _BusTimePageState createState() => _BusTimePageState();
@@ -166,10 +166,10 @@ class BusTimeItem extends StatelessWidget {
   final Locale locale;
 
   const BusTimeItem({
-    Key? key,
+    super.key,
     required this.busTime,
     required this.locale,
-  }) : super(key: key);
+  });
 
   @override
   Widget build(BuildContext context) {
@@ -188,14 +188,12 @@ class BusTimeItem extends StatelessWidget {
             arrivedTimeText = 'Arriving';
           }
           color = Colors.red;
-          break;
         case '將到站':
           if (isEnglish) {
             arrivedTimeText = 'Coming\nSoon';
             fontSize = 12.0;
           }
           color = Colors.green;
-          break;
         default:
           break;
       }

lib/pages/comfirm_form_page.dart

@@ -13,10 +13,10 @@ class ConfirmFormPage extends StatefulWidget {
   final String username;
 
   const ConfirmFormPage({
-    Key? key,
+    super.key,
     required this.confirmFormUrl,
     required this.username,
-  }) : super(key: key);
+  });
 
   @override
   _ConfirmFormPageState createState() => _ConfirmFormPageState();

lib/pages/graduation_report_page.dart

@@ -10,7 +10,7 @@ enum _State { loading, finish, error, empty, offlineEmpty }
 class GraduationReportPage extends StatefulWidget {
   static const String routerName = '/graduationReport';
 
-  const GraduationReportPage({Key? key}) : super(key: key);
+  const GraduationReportPage({super.key});
 
   @override
   GraduationReportPageState createState() => GraduationReportPageState();
@@ -441,9 +441,9 @@ class BorderContainer extends StatelessWidget {
   final Widget child;
 
   const BorderContainer({
-    Key? key,
+    super.key,
     required this.child,
-  }) : super(key: key);
+  });
 
   @override
   Widget build(BuildContext context) {

lib/pages/home_page.dart

@@ -375,21 +375,18 @@ class HomePageState extends State<HomePage> {
               locale: Locale(Intl.defaultLocale!),
             ),
           );
-          break;
         case 1:
           if (isLogin) {
             ApUtils.pushCupertinoStyle(context, CoursePage());
           } else {
             UiUtil.instance.showToast(context, ap.notLoginHint);
           }
-          break;
         case 2:
           if (isLogin) {
             ApUtils.pushCupertinoStyle(context, ScorePage());
           } else {
             UiUtil.instance.showToast(context, ap.notLoginHint);
           }
-          break;
       }
     });
   }

lib/pages/study/course_page.dart

@@ -161,16 +161,12 @@ class CoursePageState extends State<CoursePage> {
       switch (lastCode) {
         case '0':
           last = app.continuingSummerEducationProgram;
-          break;
         case '1':
           last = app.fallSemester;
-          break;
         case '2':
           last = app.springSemester;
-          break;
         case '3':
           last = app.summerSemester;
-          break;
       }
       String first;
       if (Intl.defaultLocale!.contains('en')) {

lib/pages/tuition_and_fees_page.dart

@@ -13,7 +13,7 @@ import 'package:sprintf/sprintf.dart';
 enum _State { loading, finish, error, empty }
 
 class TuitionAndFeesPage extends StatefulWidget {
-  const TuitionAndFeesPage({Key? key}) : super(key: key);
+  const TuitionAndFeesPage({super.key});
 
   @override
   _TuitionAndFeesPageState createState() => _TuitionAndFeesPageState();

lib/pages/user_info_page.dart

@@ -6,9 +6,9 @@ class UserInfoPage extends StatefulWidget {
   final UserInfo userInfo;
 
   const UserInfoPage({
-    Key? key,
+    super.key,
     required this.userInfo,
-  }) : super(key: key);
+  });
 
   @override
   _UserInfoPageState createState() => _UserInfoPageState();

lib/widgets/share_data_widget.dart

@@ -5,8 +5,7 @@ import 'package:nsysu_ap/app.dart';
 class ShareDataWidget extends InheritedWidget {
   final MyAppState data;
 
-  const ShareDataWidget(this.data, {required Widget child})
-      : super(child: child);
+  const ShareDataWidget(this.data, {required super.child});
 
   static ShareDataWidget? of(BuildContext context) {
     return context.dependOnInheritedWidgetOfExactType();

pubspec.yaml

@@ -4,7 +4,7 @@ description: NSYSU AP
 version: 1.4.2+10402
 
 environment:
-  sdk: '>=2.15.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 
 dependencies:
   flutter: