lab6

lib/components/utils/debounce.dart

@@ -0,0 +1,20 @@
+import 'dart:async';
+import 'dart:ui';
+
+class Debounce { //помощник
+  factory Debounce() => _instance; //обращение через статический конструктор
+
+  Debounce._();
+
+  static final Debounce _instance = Debounce._();
+
+  static Timer? _timer;
+
+  static void run(//создаём задержку для ввода пользователя в поисковую строку
+      VoidCallback action, {
+        Duration delay = const Duration(milliseconds: 500),
+      }) {
+    _timer?.cancel();
+    _timer = Timer(delay, action);
+  }
+}

lib/data/repositories/api_interface.dart

@@ -1,6 +1,8 @@
 
 import '../../domain/models/card.dart';
 
+typedef OnErrorCallback = void Function(String? error);
+
 abstract class ApiInterface{
   Future<List<CardData>?> loadData();
 }

lib/data/repositories/weapons_repository.dart

@@ -16,7 +16,7 @@ class WeaponsRepository extends ApiInterface {
   static const String _baseUrl = 'https://valorant-api.com/v1/weapons';
 
   @override
-  Future<List<CardData>?> loadData({String? q}) async {
+  Future<List<CardData>?> loadData({OnErrorCallback? onError,String? q,}) async {
     try {
       // Формирование URL для запроса
       final Response<dynamic> response = await _dio.get(_baseUrl);
@@ -37,7 +37,7 @@ class WeaponsRepository extends ApiInterface {
       return data;
     } on DioException catch (e) {
       // Обработка ошибок запроса
-      print('Ошибка при загрузке данных: $e');
+      onError?.call(e.error?.toString());
       return null;
     }
   }

lib/main.dart

@@ -1,4 +1,7 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:flutter_test_app/presentation/home_page/bloc/bloc.dart';
+import 'data/repositories/weapons_repository.dart';
 import 'presentation/home_page/home_page.dart';
 
 void main() {
@@ -17,7 +20,15 @@ class MyApp extends StatelessWidget {
         colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepOrange),
         useMaterial3: true,
       ),
-      home: const MyHomePage(title: 'Лобашов Иван Дмитриевич'),
+      home: RepositoryProvider<WeaponsRepository>( //даём нашему репозиторию доступ
+        lazy: true, //ленивое создание объекта
+        create: (_) => WeaponsRepository(),
+        child: BlocProvider<HomeBloc>( //даём доступ Bloc для нашей страницы
+          lazy: false,
+          create: (context) => HomeBloc(context.read<WeaponsRepository>()), //в конструктор нашего Блока передаём репозиторий с нашей апи, то есть у нас появляется доступ по дереву к апи
+          child: const MyHomePage(title: 'Каталог оружий Valorant'),
+        ),
+      ),
     );
   }
 }

lib/presentation/home_page/bloc/bloc.dart

@@ -0,0 +1,30 @@
+import 'package:flutter_test_app/presentation/home_page/bloc/state.dart';
+import 'package:flutter_test_app/presentation/home_page/bloc/events.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import '../../../data/repositories/weapons_repository.dart';
+
+class HomeBloc extends Bloc<HomeEvent, HomeState>{//наследуем от Bloc и передаём состояния
+  final WeaponsRepository rep;
+
+  HomeBloc(this.rep) : super(const HomeState()) {
+    on<HomeLoadDataEvent>(_onLoadData);
+  }
+
+  Future<void> _onLoadData(
+      HomeLoadDataEvent event, Emitter<HomeState> emit) async {
+    emit(state.copyWith(isLoading: true)); //метода emit изменяет наши состояния
+
+    String? error;
+
+    final data = await rep.loadData( //загрузка данных
+      q: event.search,
+      onError: (e) => error = e,
+    );
+
+    emit(state.copyWith( //метода emit изменяет наши состояния
+      isLoading: false, //флаг загрузки меняем на false
+      data: data,
+      error: error,
+    ));
+  }
+}

lib/presentation/home_page/bloc/events.dart

@@ -0,0 +1,9 @@
+abstract class HomeEvent{ //наследуем все события
+  const HomeEvent();
+}
+
+class HomeLoadDataEvent extends HomeEvent{
+  final String? search; //событие поиска
+
+  const HomeLoadDataEvent({this.search}); //событие на загрузку данных
+}

lib/presentation/home_page/bloc/state.dart

@@ -0,0 +1,34 @@
+import 'package:copy_with_extension/copy_with_extension.dart';
+import 'package:equatable/equatable.dart';
+import '../../../domain/models/card.dart';
+
+@CopyWith()
+class HomeState extends Equatable{ //сравнение двух состояний через Equatable
+  final List<CardData>? data;
+  final bool isLoading; //отображение загрузки
+  final String? error; //отображение ошибок
+
+  const HomeState({
+    this.data,
+    this.isLoading = false,
+    this.error,
+  });
+
+  HomeState copyWith({ //copyWith создаёт копию объекта с изменением некоторых данных
+    List<CardData>? data,
+    bool? isLoading,
+    String? error,
+  }) =>
+      HomeState(
+        data: data ?? this.data,
+        isLoading: isLoading ?? this.isLoading,
+        error: error ?? this.error,
+      );
+
+  @override
+  List<Object?> get props => [
+    data,
+    isLoading,
+    error,
+  ];
+}

lib/presentation/home_page/home_page.dart

@@ -1,12 +1,16 @@
-import 'package:flutter_test_app/data/repositories/mock_repository.dart';
-import 'package:flutter_test_app/main.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
+import '../../components/utils/debounce.dart';
 import '../../data/repositories/weapons_repository.dart';
 import '../../domain/models/card.dart';
 import '../details_page/details_page.dart';
 
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'bloc/bloc.dart';
+import 'bloc/events.dart';
+import 'bloc/state.dart';
+
 part 'card.dart';
 
 class MyHomePage extends StatefulWidget {
@@ -43,85 +47,74 @@ class Body extends StatefulWidget {
 class _BodyState extends State<Body> {
   final searchController = TextEditingController();
   final ScrollController _scrollController = ScrollController();
-  late Future<List<CardData>?> data;
-  final repo = WeaponsRepository();
-  List<CardData>? filteredData;
 
   @override
   void initState() {
-    data = repo.loadData();
+    WidgetsBinding.instance.addPostFrameCallback((_) { // привязываем логику к кадру
+      context.read<HomeBloc>().add(const HomeLoadDataEvent()); // добавляем данные после считывания
+    });
     super.initState();
   }
 
   @override
   void dispose() {
-    searchController.dispose();
+    searchController.dispose(); // очистка контроллера
     _scrollController.dispose();
     super.dispose();
   }
-
+  Future<void> _onRefresh() {
-  // Метод для фильтрации карточек по запросу
+    context
-  void _filterCards(String searchQuery, List<CardData>? dataList) {
+        .read<HomeBloc>()
-    if (dataList == null || dataList.isEmpty) return;
+        .add(HomeLoadDataEvent(search: searchController.text));
-
+    return Future.value(null); //прекращение отображения загрузки
-    final filteredList = dataList.where((data) =>
-    data.text?.toLowerCase().contains(searchQuery.toLowerCase()) ?? false).toList();
-
-    setState(() {
-      filteredData = filteredList;
-    });
   }
 
   @override
   Widget build(BuildContext context) {
-    return Padding(
+    return Column(
-      padding: EdgeInsets.only(top: MediaQuery.of(context).padding.top),
-      child: Column(
       children: [
         Padding(
           padding: const EdgeInsets.all(12),
           child: CupertinoSearchTextField(
             controller: searchController,
-              onSubmitted: (search) {
+            onChanged: (search ) { //вызов задержки пока пользователь не перестанет печатать в поисковой строке
-                data.then((dataList) {
+              Debounce.run(() => context.read<HomeBloc>().add(HomeLoadDataEvent(search: search)));
-                  _filterCards(search, dataList);
-                });
             },
           ),
         ),
-          Expanded(
+        BlocBuilder<HomeBloc, HomeState>( //ждёт изменения состояния
-            child: Center(
+          builder: (context, state) => state.error != null
-              child: FutureBuilder<List<CardData>?>(
+              ? Text(
-                future: data,
+            state.error ?? '',
-                builder: (context, snapshot) {
+            style: Theme.of(context)
-                  if (snapshot.connectionState == ConnectionState.waiting) {
+                .textTheme
-                    return const CircularProgressIndicator();
+                .headlineSmall
-                  } else if (snapshot.hasError) {
+                ?.copyWith(color: Colors.red),
-                    return Text('Error: ${snapshot.error}');
+          )
-                  } else if (snapshot.hasData && snapshot.data != null) {
+              : state.isLoading
-                    final displayData = filteredData ?? snapshot.data!;
+              ? const CircularProgressIndicator()
-                    return ListView.builder(
+              : Expanded(
-                      controller: _scrollController,
+            child: RefreshIndicator(
-                      itemCount: displayData.length,
+              onRefresh: _onRefresh,
+              child: ListView.builder(
+                padding: EdgeInsets.zero,
+                itemCount: state.data?.length ?? 0,
                 itemBuilder: (context, index) {
-                        final cardData = displayData[index];
+                  final data = state.data?[index];
-                        return _Card.fromData(
+                  return data != null
-                          cardData,
+                      ? _Card.fromData(
+                    data,
                     onLike: (String title, bool isLiked) =>
                         _showSnackBar(context, title, isLiked),
-                          onTap: () => _navToDetails(context, cardData),
+                    onTap: () => _navToDetails(context, data),
-                        );
+                  )
-                      },
+                      : const SizedBox.shrink();
-                    );
-                  } else {
-                    return const Text('No data available');
-                  }
                 },
               ),
             ),
           ),
+        ),
       ],
-      ),
     );
   }
 

pubspec.lock

@@ -161,6 +161,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.1.1"
+  copy_with_extension:
+    dependency: transitive
+    description:
+      name: copy_with_extension
+      sha256: fbcf890b0c34aedf0894f91a11a579994b61b4e04080204656b582708b5b1125
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.0.4"
+  copy_with_extension_gen:
+    dependency: "direct main"
+    description:
+      name: copy_with_extension_gen
+      sha256: "51cd11094096d40824c8da629ca7f16f3b7cea5fc44132b679617483d43346b0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.0.4"
   crypto:
     dependency: transitive
     description:
@@ -209,6 +225,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.1"
+  equatable:
+    dependency: "direct main"
+    description:
+      name: equatable
+      sha256: "567c64b3cb4cf82397aac55f4f0cbd3ca20d77c6c03bedbc4ceaddc08904aef7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.7"
   fake_async:
     dependency: transitive
     description:
@@ -238,6 +262,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_bloc:
+    dependency: "direct main"
+    description:
+      name: flutter_bloc
+      sha256: b594505eac31a0518bdcb4b5b79573b8d9117b193cc80cc12e17d639b10aa27a
+      url: "https://pub.dev"
+    source: hosted
+    version: "8.1.6"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -379,6 +411,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.4"
+  nested:
+    dependency: transitive
+    description:
+      name: nested
+      sha256: "03bac4c528c64c95c722ec99280375a6f2fc708eec17c7b3f07253b626cd2a20"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
   package_config:
     dependency: transitive
     description:
@@ -411,6 +451,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.0"
+  provider:
+    dependency: transitive
+    description:
+      name: provider
+      sha256: c8a055ee5ce3fd98d6fc872478b03823ffdb448699c6ebdbbc71d59b596fd48c
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.1.2"
   pub_semver:
     dependency: transitive
     description:
@@ -578,3 +626,4 @@ packages:
     version: "3.1.2"
 sdks:
   dart: ">=3.1.3 <4.0.0"
+  flutter: ">=1.16.0"

pubspec.yaml

@@ -40,6 +40,9 @@ dependencies:
   pretty_dio_logger: ^1.3.1
   json_annotation: ^4.8.1
   html: ^0.15.0
+  equatable: ^2.0.5
+  flutter_bloc: ^8.1.5
+  copy_with_extension_gen: ^5.0.4
 
 dev_dependencies:
   flutter_test: