рабочая 6 лаба

lib/components/utils/debounce.dart

@@ -0,0 +1,22 @@
+import 'dart:async';
+import 'dart:ui';
+
+import 'package:flutter/cupertino.dart';
+
+class Debounce {
+  factory Debounce() => _instance;
+
+  Debounce._();
+
+  static final Debounce _instance = Debounce._();
+
+  static Timer? _timer;
+
+  static void run(
+      VoidCallback action, {
+        Duration delay = const Duration(milliseconds: 500),
+      }) {
+    _timer?.cancel();
+    _timer = Timer(delay, action);
+  }
+}

lib/data/repository/api_interface.dart

@@ -1,5 +1,7 @@
 import 'package:pmu/domain/models/card.dart';
 
+typedef OnErrorCallback = void Function(String? error);
+
 abstract class ApiInterface{
   Future<List<MarketData>?> loadData();
 }

lib/data/repository/food_repository.dart

@@ -14,7 +14,7 @@ class FoodRepository extends ApiInterface{
 
   static const String _baseUrl = 'https://www.themealdb.com/api/json/v1/1';
   @override
-  Future<List<MarketData>?> loadData({String? q}) async {
+  Future<List<MarketData>?> loadData({OnErrorCallback? onError, String? q}) async {
     try {
       final String url = q != null ? '$_baseUrl/search.php' : '$_baseUrl/filter.php?i=chicken_breast';
 
@@ -27,7 +27,7 @@ class FoodRepository extends ApiInterface{
       final List<MarketData>? items = dto.meals?.map((e) => e.toDomain()).toList();
       return items;
     } on DioException catch (e) {
-      print('Ошибка запроса: $e');
+      onError?.call(e.error?.toString());
       return null;
     }
   }

lib/main.dart

@@ -1,4 +1,7 @@
 import 'package:flutter/material.dart';
+import 'package:pmu/data/repository/food_repository.dart';
+import 'package:pmu/presentation/home_page/bloc/bloc.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:pmu/presentation/home_page/home_page.dart';
 
 void main() {
@@ -16,7 +19,15 @@ class MyApp extends StatelessWidget {
         colorScheme: ColorScheme.fromSeed(seedColor: Color(0xFFFFA400)),
         useMaterial3: true,
       ),
-      home: const MyHomePage(title: 'Магизин у дома'),
+      home: RepositoryProvider<FoodRepository>(
+        lazy: true,
+        create: (_) => FoodRepository(),
+        child: BlocProvider<HomeBloc>(
+          lazy: false,
+          create: (context) => HomeBloc(context.read<FoodRepository>()),
+          child: const MyHomePage(title: "Food cort"),
+        ),
+      )
     );
   }
 }

lib/presentation/home_page/bloc/bloc.dart

@@ -0,0 +1,29 @@
+import 'package:pmu/data/repository/food_repository.dart';
+import 'package:pmu/presentation/home_page/bloc/events.dart';
+import 'package:pmu/presentation/home_page/bloc/state.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+
+class HomeBloc extends Bloc<HomeEvent, HomeState> {
+  final FoodRepository repo;
+
+  HomeBloc(this.repo) : super(const HomeState()) {
+    on<HomeLoadDataEvent>(_onLoadData);
+  }
+
+  void _onLoadData(HomeLoadDataEvent event, Emitter<HomeState> emit) async {
+    emit(state.copyWith(isLoading: true));
+
+    String? error;
+
+    final data = await repo.loadData(
+      q: event.search,
+      onError: (e) => error = e,
+    );
+
+    emit(state.copyWith(
+      isLoading: false,
+      data: data,
+      error: error,
+    ));
+  }
+}

lib/presentation/home_page/bloc/events.dart

@@ -0,0 +1,9 @@
+abstract class HomeEvent {
+  const HomeEvent();
+}
+class HomeLoadDataEvent extends HomeEvent {
+
+  final String? search;
+
+  const HomeLoadDataEvent({this.search});
+}

lib/presentation/home_page/bloc/state.dart

@@ -0,0 +1,33 @@
+import 'package:equatable/equatable.dart';
+import 'package:pmu/domain/models/card.dart';
+
+
+class HomeState extends Equatable {
+  final List<MarketData>? data;
+  final bool isLoading;
+  final String? error;
+
+  const HomeState({
+    this.data,
+    this.isLoading = false,
+    this.error,
+  });
+
+  HomeState copyWith({
+    List<MarketData>? 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

@@ -1,9 +1,15 @@
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:pmu/components/utils/debounce.dart';
 import 'package:pmu/data/repository/food_repository.dart';
 import 'package:pmu/data/repository/mock_repository.dart';
 import 'package:pmu/domain/models/card.dart';
+import 'package:pmu/main.dart';
 import 'package:pmu/presentation/details_page/details_page.dart';
+import 'package:pmu/presentation/home_page/bloc/bloc.dart';
+import 'package:pmu/presentation/home_page/bloc/events.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:pmu/presentation/home_page/bloc/state.dart';
 
 part 'card.dart';
 
@@ -21,12 +27,29 @@ class _MyHomePageState extends State<MyHomePage> {
   final searchController = TextEditingController();
   late Future<List<MarketData>?> data;
   final repo = FoodRepository();
+
   @override
   void initState() {
-    data = repo.loadData();
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      context.read<HomeBloc>().add(const HomeLoadDataEvent());
+    });
+
     super.initState();
   }
 
+  @override
+  void dispose() {
+    searchController.dispose();
+    super.dispose();
+  }
+
+  Future<void> _onRefresh() {
+    context
+        .read<HomeBloc>()
+        .add(HomeLoadDataEvent(search: searchController.text));
+    return Future.value(null);
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -38,45 +61,51 @@ class _MyHomePageState extends State<MyHomePage> {
               padding: const EdgeInsets.all(12),
               child: CupertinoSearchTextField(
                 controller: searchController,
-                style: const TextStyle(color: Colors.white),
+                onChanged: (search) {
-                onSubmitted: (search) {
+                  Debounce.run(() => context
-                  setState(() {
+                      .read<HomeBloc>()
-                    data = repo.loadData(q: search);
+                      .add(HomeLoadDataEvent(search: search)));
-                  });
                 },
               ),
             ),
-            Expanded(
+            BlocBuilder<HomeBloc, HomeState>(
-              child: Center(
+                builder: (context, state) => state.error != null
-                child: FutureBuilder<List<MarketData>?>(
+                    ? Text(
-                  future: data,
+                        state.error ?? '',
-                  builder: (context, snapshot) => SingleChildScrollView(
+                        style: Theme.of(context)
-                    child: snapshot.hasData
+                            .textTheme
-                        ? Column(
+                            .headlineSmall
-                      mainAxisAlignment: MainAxisAlignment.center,
+                            ?.copyWith(color: Colors.red),
-                      children: snapshot.data?.map((data) {
-                        return _MarketCard.fromData(
-                          data,
-                          onLike: (String title, bool isLiked) =>
-                              _showSnackBar(context, title, isLiked),
-                          onTap: () => _navToDetails(context, data),
-                        );
-                      }).toList() ??
-                          [],
                       )
-                        : const CircularProgressIndicator(),
+                    : state.isLoading
-                  ),
+                        ? const CircularProgressIndicator()
-                ),
+                        : Expanded(
-              ),
+                            child: RefreshIndicator(
+                            onRefresh: _onRefresh,
+                            child: ListView.builder(
+                              padding: EdgeInsets.zero,
+                              itemCount: state.data?.length ?? 0,
+                              itemBuilder: (context, index) {
+                                final data = state.data?[index];
+                                return data != null
+                                    ? _MarketCard.fromData(
+                                        data,
+                                        onLike: (title, isLiked) =>
+                                            _showSnackBar(
+                                                context, title, isLiked),
+                                        onTap: () =>
+                                            _navToDetails(context, data),
+                                      )
+                                    : const SizedBox.shrink();
+                              },
                             ),
+                          ))),
           ],
         ),
       ),
     );
   }
 
-
-
   void _showSnackBar(BuildContext context, String title, bool isLiked) {
     WidgetsBinding.instance.addPostFrameCallback((_) {
       ScaffoldMessenger.of(context).showSnackBar(SnackBar(

pubspec.lock

@@ -38,6 +38,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.11.0"
+  bloc:
+    dependency: transitive
+    description:
+      name: bloc
+      sha256: "106842ad6569f0b60297619e9e0b1885c2fb9bf84812935490e6c5275777804e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "8.1.4"
   boolean_selector:
     dependency: transitive
     description:
@@ -158,6 +166,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.1.2"
+  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 dev"
+    description:
+      name: copy_with_extension_gen
+      sha256: "51cd11094096d40824c8da629ca7f16f3b7cea5fc44132b679617483d43346b0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.0.4"
   crypto:
     dependency: transitive
     description:
@@ -198,6 +222,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
+  equatable:
+    dependency: "direct dev"
+    description:
+      name: equatable
+      sha256: "567c64b3cb4cf82397aac55f4f0cbd3ca20d77c6c03bedbc4ceaddc08904aef7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.7"
   fake_async:
     dependency: transitive
     description:
@@ -227,6 +259,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_bloc:
+    dependency: "direct dev"
+    description:
+      name: flutter_bloc
+      sha256: b594505eac31a0518bdcb4b5b79573b8d9117b193cc80cc12e17d639b10aa27a
+      url: "https://pub.dev"
+    source: hosted
+    version: "8.1.6"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -392,6 +432,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
+  nested:
+    dependency: transitive
+    description:
+      name: nested
+      sha256: "03bac4c528c64c95c722ec99280375a6f2fc708eec17c7b3f07253b626cd2a20"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
   package_config:
     dependency: transitive
     description:
@@ -424,6 +472,14 @@ 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:

pubspec.yaml

@@ -47,6 +47,10 @@ dev_dependencies:
   build_runner: ^2.4.9
   json_serializable: ^6.7.1
 
+  equatable: ^2.0.5
+  flutter_bloc: ^8.1.5
+  copy_with_extension_gen: ^5.0.4
+
   # The "flutter_lints" package below contains a set of recommended lints to
   # encourage good coding practices. The lint set provided by the package is
   # activated in the `analysis_options.yaml` file located at the root of your