Use and apply flutter lints

analysis_options.yaml

+include: package:flutter_lints/flutter.yaml

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=1.0.45
-app.versionCode=46
+app.versionName=1.0.46
+app.versionCode=47

lib/config/menu.dart

@@ -24,39 +24,39 @@ class MenuItem {
 
 class Menu {
   static List<MenuItem> items = [
-    MenuItem(
+    const MenuItem(
       code: 'bottom_nav_sample',
-      icon: const Icon(UniconsLine.image),
+      icon: Icon(UniconsLine.image),
       page: DemoPage(),
     ),
-    MenuItem(
+    const MenuItem(
       code: 'bottom_nav_api',
-      icon: const Icon(UniconsLine.globe),
+      icon: Icon(UniconsLine.globe),
       page: ApiPage(),
     ),
-    MenuItem(
+    const MenuItem(
       code: 'bottom_nav_camera',
-      icon: const Icon(UniconsLine.camera),
+      icon: Icon(UniconsLine.camera),
       page: CameraPage(),
     ),
-    MenuItem(
+    const MenuItem(
       code: 'bottom_nav_chart',
-      icon: const Icon(UniconsLine.pen),
+      icon: Icon(UniconsLine.pen),
       page: GraphPage(),
     ),
-    MenuItem(
+    const MenuItem(
       code: 'bottom_nav_game',
-      icon: const Icon(UniconsLine.star),
+      icon: Icon(UniconsLine.star),
       page: GamePage(),
     ),
-    MenuItem(
+    const MenuItem(
       code: 'bottom_nav_settings',
-      icon: const Icon(UniconsLine.setting),
+      icon: Icon(UniconsLine.setting),
       page: SettingsPage(),
     ),
-    MenuItem(
+    const MenuItem(
       code: 'bottom_nav_about',
-      icon: const Icon(UniconsLine.info_circle),
+      icon: Icon(UniconsLine.info_circle),
       page: AboutPage(),
     ),
   ];

lib/cubit/api_cubit.dart

@@ -27,7 +27,7 @@ class ApiDataCubit extends HydratedCubit<ApiDataState> {
         }
       }
     }
-    print('emit new state: ' + stateAsString);
+    print('emit new state: $stateAsString');
 
     emit(state);
   }

lib/cubit/api_state.dart

@@ -16,6 +16,7 @@ class ApiDataFetchInitial extends ApiDataState {}
 class ApiDataFetchLoading extends ApiDataState {}
 
 class ApiDataFetchLoaded extends ApiDataState {
+  @override
   final ApiData data;
 
   const ApiDataFetchLoaded({

lib/cubit/settings_cubit.dart

@@ -35,9 +35,9 @@ class SettingsCubit extends HydratedCubit<SettingsState> {
     InterfaceType? interfaceType,
   }) {
     emit(SettingsState(
-      apiUrl: apiUrl != null ? apiUrl : state.apiUrl,
-      securityToken: securityToken != null ? securityToken : state.securityToken,
-      interfaceType: interfaceType != null ? interfaceType : state.interfaceType,
+      apiUrl: apiUrl ?? state.apiUrl,
+      securityToken: securityToken ?? state.securityToken,
+      interfaceType: interfaceType ?? state.interfaceType,
     ));
   }
 

lib/main.dart

@@ -63,7 +63,7 @@ class MyApp extends StatelessWidget {
       child: MaterialApp(
         title: 'Random application',
         theme: appTheme,
-        home: SkeletonScreen(),
+        home: const SkeletonScreen(),
         localizationsDelegates: context.localizationDelegates,
         supportedLocales: context.supportedLocales,
         locale: context.locale,

lib/models/api_data.dart

@@ -21,13 +21,14 @@ class ApiData {
 
   Map<String, dynamic>? toJson() {
     return <String, dynamic>{
-      'number': this.number ?? 0,
-      'md5': this.md5 ?? '',
-      'updatedAt': this.updatedAt?.toString(),
+      'number': number ?? 0,
+      'md5': md5 ?? '',
+      'updatedAt': updatedAt?.toString(),
     };
   }
 
+  @override
   String toString() {
-    return jsonEncode(this.toJson());
+    return jsonEncode(toJson());
   }
 }

lib/models/game/game.dart

@@ -37,57 +37,58 @@ class Game {
   }
 
   void stop() {
-    this.isRunning = false;
-    this.isFinished = true;
+    isRunning = false;
+    isFinished = true;
   }
 
   GameCell getCell(int x, int y) {
-    return this.board.cells[y][x];
+    return board.cells[y][x];
   }
 
   int? getCellValue(int x, int y) {
-    return this.getCell(x, y).value;
+    return getCell(x, y).value;
   }
 
   void updateCellValue(int x, int y, int? value) {
-    this.board.cells[y][x].value = value;
+    board.cells[y][x].value = value;
   }
 
   void setRandomCellValue(int x, int y, GameSettings settings) {
     final int maxValue = settings.colorsCount;
-    final rand = new Random();
+    final rand = Random();
     int value = 1 + rand.nextInt(maxValue);
 
-    this.board.cells[y][x].value = value;
+    board.cells[y][x].value = value;
   }
 
   void increaseMovesCount() {
-    this.movesCount += 1;
+    movesCount += 1;
   }
 
   void increaseScore(int? count) {
-    this.score += (count ?? 0);
+    score += (count ?? 0);
   }
 
+  @override
   String toString() {
-    return 'Game(' + this.toJson().toString() + ')';
+    return 'Game(${toJson()})';
   }
 
   Map<String, dynamic>? toJson() {
     return <String, dynamic>{
-      'board': this.board.toJson(),
-      'settings': this.settings.toJson(),
-      'isRunning': this.isRunning,
-      'isFinished': this.isFinished,
-      'availableBlocksCount': this.availableBlocksCount,
-      'movesCount': this.movesCount,
-      'score': this.score,
+      'board': board.toJson(),
+      'settings': settings.toJson(),
+      'isRunning': isRunning,
+      'isFinished': isFinished,
+      'availableBlocksCount': availableBlocksCount,
+      'movesCount': movesCount,
+      'score': score,
     };
   }
 
   void dump() {
-    GameBoard.printGrid(this.board.cells);
-    print(this.settings.toJson());
-    print(this.toJson());
+    GameBoard.printGrid(board.cells);
+    print(settings.toJson());
+    print(toJson());
   }
 }

lib/models/game/game_board.dart

@@ -19,7 +19,7 @@ class GameBoard {
     final int boardSizeVertical = gameSettings.boardSize;
     final int maxValue = gameSettings.colorsCount;
 
-    final rand = new Random();
+    final rand = Random();
 
     List<List<GameCell>> grid = [];
     for (var rowIndex = 0; rowIndex < boardSizeVertical; rowIndex++) {
@@ -49,13 +49,14 @@ class GameBoard {
     print('');
   }
 
+  @override
   String toString() {
-    return 'Board(' + this.toJson().toString() + ')';
+    return 'Board(${toJson()})';
   }
 
   Map<String, dynamic>? toJson() {
     return <String, dynamic>{
-      'cells': this.cells.toString(),
+      'cells': cells.toString(),
     };
   }
 }

lib/models/game/game_cell.dart

@@ -5,13 +5,14 @@ class GameCell {
     this.value,
   );
 
+  @override
   String toString() {
-    return 'Cell(' + this.toJson().toString() + ')';
+    return 'Cell(${toJson()})';
   }
 
   Map<String, dynamic>? toJson() {
     return <String, dynamic>{
-      'value': this.value,
+      'value': value,
     };
   }
 }

lib/models/game/game_settings.dart

@@ -32,14 +32,15 @@ class GameSettings {
     );
   }
 
+  @override
   String toString() {
-    return 'GameSettings(' + this.toJson().toString() + ')';
+    return 'GameSettings(${toJson()})';
   }
 
   Map<String, dynamic>? toJson() {
     return <String, dynamic>{
-      'boardSize': this.boardSize,
-      'colorsCount': this.colorsCount,
+      'boardSize': boardSize,
+      'colorsCount': colorsCount,
     };
   }
 }

lib/models/interface_type.dart

@@ -8,7 +8,7 @@ enum InterfaceType {
 
 class InterfaceTypes {
   static List<Widget> selectWidgets = <Widget>[
-    Text('interface_type_basic').tr(),
-    Text('interface_type_expert').tr(),
+    const Text('interface_type_basic').tr(),
+    const Text('interface_type_expert').tr(),
   ];
 }

lib/network/api.dart

@@ -10,10 +10,10 @@ class ApiService {
   final String baseUrl = 'https://tools.harrault.fr/tools/api';
 
   Future<Response?> getData() async {
-    String url = baseUrl + '/get.php';
+    String url = '$baseUrl/get.php';
     try {
-      print('fetching api data... ' + url);
-      final Response? response = await _dio.get(url);
+      print('fetching api data... $url');
+      final Response response = await _dio.get(url);
       print('ok got api response.');
       print(response);
       return response;

lib/repository/api.dart

@@ -8,7 +8,7 @@ class ApiRepository {
 
   Future<ApiData> getApiData() async {
     print('(getApiData) delayed API call...');
-    final response = await Future.delayed(Duration(milliseconds: 1000))
+    final response = await Future.delayed(const Duration(milliseconds: 1000))
         .then((value) => apiService.getData());
     if (response != null) {
       print('(getApiData) got api response');

lib/ui/painters/cell_painter.dart

@@ -30,7 +30,7 @@ class CellPainter extends CustomPainter {
 
     const borderWidth = 0.05;
 
-    final Rect baseSquare = Rect.fromPoints(Offset(0, 0), Offset(size.width, size.height));
+    final Rect baseSquare = Rect.fromPoints(const Offset(0, 0), Offset(size.width, size.height));
 
     final paintBaseSquare = Paint()
       ..style = PaintingStyle.fill

lib/ui/painters/graph_painter.dart

@@ -35,14 +35,14 @@ class GraphPainter extends CustomPainter {
     paintBackground.color = Colors.black;
     paintBackground.style = PaintingStyle.fill;
 
-    final Rect rectBackground = Rect.fromPoints(Offset(0, 0), Offset(size.width, size.height));
+    final Rect rectBackground = Rect.fromPoints(const Offset(0, 0), Offset(size.width, size.height));
     canvas.drawRect(rectBackground, paintBackground);
 
     // Draw some lines
     Paint paintLine = Paint();
     paintLine.style = PaintingStyle.fill;
 
-    for (int i = 0; i < this.linesCount; i++) {
+    for (int i = 0; i < linesCount; i++) {
       paintLine.color = getRandomColor();
       paintLine.strokeWidth = Random().nextDouble() * 4 + 2;
 

lib/ui/screens/about_page.dart

@@ -14,15 +14,15 @@ class AboutPage extends StatelessWidget {
       crossAxisAlignment: CrossAxisAlignment.start,
       mainAxisSize: MainAxisSize.max,
       children: <Widget>[
-        SizedBox(height: 8),
-        AppHeader(text: 'about_title'),
-        Text('about_content').tr(),
+        const SizedBox(height: 8),
+        const AppHeader(text: 'about_title'),
+        const Text('about_content').tr(),
         FutureBuilder<PackageInfo>(
           future: PackageInfo.fromPlatform(),
           builder: (context, snapshot) {
             switch (snapshot.connectionState) {
               case ConnectionState.done:
-                return Text('about_version').tr(
+                return const Text('about_version').tr(
                   namedArgs: {
                     'version': snapshot.data!.version,
                   },

lib/ui/screens/api_page.dart

@@ -17,9 +17,9 @@ class ApiPage extends StatelessWidget {
         padding: const EdgeInsets.symmetric(horizontal: 4),
         physics: const BouncingScrollPhysics(),
         children: <Widget>[
-          SizedBox(height: 8),
-          AppHeader(text: 'api_page_title'),
-          SizedBox(height: 20),
+          const SizedBox(height: 8),
+          const AppHeader(text: 'api_page_title'),
+          const SizedBox(height: 20),
           BlocBuilder<ApiDataCubit, ApiDataState>(
             builder: (BuildContext context, ApiDataState apiDataState) {
               return ApiDataWidget(

lib/ui/screens/camera_page.dart

@@ -13,12 +13,12 @@ class CameraPage extends StatelessWidget {
   Widget build(BuildContext context) {
     return Material(
       color: Theme.of(context).colorScheme.background,
-      child: Column(
+      child: const Column(
         mainAxisAlignment: MainAxisAlignment.start,
         crossAxisAlignment: CrossAxisAlignment.center,
         children: <Widget>[
-          const SizedBox(height: 8),
-          const TakePictureWidget(),
+          SizedBox(height: 8),
+          TakePictureWidget(),
         ],
       ),
     );