Stepan/PIbd-31_Afanasev.S.S._Mobile_Device_Programming
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Сделал Lab6

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Stepan 2024-11-29 16:08:55 +04:00
parent 2cab244d82
commit 08679029aa
10 changed files with 217 additions and 53 deletions
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20
lib/components/utils/debounce.dart Normal file
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@ -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);
}
}

2
lib/data/repositories/api_interface.dart
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@ -1,6 +1,8 @@
import '../../domain/models/card.dart';
typedef OnErrorCallback = void Function(String? error);
abstract class ApiInterface{
Future<List<CardData>?> loadData();
}

6
lib/data/repositories/characters_repository.dart
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@ -13,10 +13,10 @@ class AgentsRepository extends ApiInterface {
requestBody: true,
));
static const String _baseUrl = 'https://valorant-api.com/v1/agents';
static const String _baseUrl = 'https://valorant-api.com/v1/ agents';
@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 AgentsRepository extends ApiInterface {
return data;
} on DioException catch (e) {
// Обработка ошибок запроса
print('Ошибка при загрузке данных: $e');
onError?.call(e.error?.toString());
return null;
}
}

13
lib/main.dart
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@ -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/characters_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: 'Афанасьев Степан Сергеевич'),
home: RepositoryProvider<AgentsRepository>( //даём нашему репозиторию доступ
lazy: true, //ленивое создание объекта
create: (_) => AgentsRepository(),
child: BlocProvider<HomeBloc>( //даём доступ Bloc для нашей страницы
lazy: false,
create: (context) => HomeBloc(context.read<AgentsRepository>()), //в конструктор нашего Блока передаём репозиторий с нашей апи, то есть у нас появляется доступ по дереву к апи
child: const MyHomePage(title: 'Агенты Valorant'),
),
),
);
}
}

30
lib/presentation/home_page/bloc/bloc.dart Normal file
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@ -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/characters_repository.dart';
class HomeBloc extends Bloc<HomeEvent, HomeState>{//наследуем от Bloc и передаём состояния
final AgentsRepository 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,
));
}
}

9
lib/presentation/home_page/bloc/events.dart Normal file
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@ -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
}

34
lib/presentation/home_page/bloc/state.dart Normal file
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@ -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,
];
}

105
lib/presentation/home_page/home_page.dart
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@ -1,13 +1,15 @@
import 'package:flutter_bloc/flutter_bloc.dart';
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 '../../data/repositories/characters_repository.dart';
import '../../domain/models/card.dart';
import '../details_page/details_page.dart';
import 'bloc/bloc.dart';
import 'bloc/events.dart';
import 'bloc/state.dart';
import '../../components/utils/debounce.dart';
part 'card.dart';
class MyHomePage extends StatefulWidget {
@ -44,21 +46,27 @@ class Body extends StatefulWidget {
class _BodyState extends State<Body> {
final searchController = TextEditingController();
final ScrollController _scrollController = ScrollController();
late Future<List<CardData>?> data;
final repo = AgentsRepository();
@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() {
context
.read<HomeBloc>()
.add(HomeLoadDataEvent(search: searchController.text));
return Future.value(null); //прекращение отображения загрузки
}
// Метод для прокрутки к определённой карточке
void _scrollToCard(String searchQuery, List<CardData>? dataList) {
@ -78,53 +86,52 @@ class _BodyState extends State<Body> {
@override
Widget build(BuildContext context) {
return Padding(
padding: EdgeInsets.only(top: MediaQuery.of(context).padding.top),
child: Column(
children: [
Padding(
padding: const EdgeInsets.all(12),
child: CupertinoSearchTextField(
controller: searchController,
onSubmitted: (search) {
data.then((dataList) {
_scrollToCard(search, dataList);
});
},
),
return Column(
children: [
Padding(
padding: const EdgeInsets.all(12),
child: CupertinoSearchTextField(
controller: searchController,
onChanged: (search ) { //вызов задержки пока пользователь не перестанет печатать в поисковой строке
Debounce.run(() => context
.read<HomeBloc>()
.add(HomeLoadDataEvent(search: search)));
},
),
Expanded(
child: Center(
child: FutureBuilder<List<CardData>?>(
future: data,
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.waiting) {
return const CircularProgressIndicator();
} else if (snapshot.hasError) {
return Text('Error: ${snapshot.error}');
} else if (snapshot.hasData && snapshot.data != null) {
return ListView.builder(
controller: _scrollController,
itemCount: snapshot.data!.length,
itemBuilder: (context, index) {
final cardData = snapshot.data![index];
return _Card.fromData(
cardData,
onLike: (String title, bool isLiked) =>
_showSnackBar(context, title, isLiked),
onTap: () => _navToDetails(context, cardData),
);
},
);
} else {
return const Text('No data available');
}
),
BlocBuilder<HomeBloc, HomeState>( //ждёт изменения состояния
builder: (context, state) => state.error != null
? Text(
state.error ?? '',
style: Theme.of(context)
.textTheme
.headlineSmall
?.copyWith(color: Colors.red),
)
: 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
? _Card.fromData(
data,
onLike: (String title, bool isLiked) =>
_showSnackBar(context, title, isLiked),
onTap: () => _navToDetails(context, data),
)
: const SizedBox.shrink();
},
),
),
),
],
),
),
],
);
}

48
pubspec.lock
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@ -166,6 +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 main"
description:
name: copy_with_extension_gen
sha256: "51cd11094096d40824c8da629ca7f16f3b7cea5fc44132b679617483d43346b0"
url: "https://pub.dev"
source: hosted
version: "5.0.4"
crypto:
dependency: transitive
description:
@ -214,6 +230,14 @@ packages:
url: "https://pub.dev"
source: hosted
version: "2.0.0"
equatable:
dependency: "direct main"
description:
name: equatable
sha256: "567c64b3cb4cf82397aac55f4f0cbd3ca20d77c6c03bedbc4ceaddc08904aef7"
url: "https://pub.dev"
source: hosted
version: "2.0.7"
fake_async:
dependency: transitive
description:
@ -243,6 +267,14 @@ 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:
@ -416,6 +448,14 @@ 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:
@ -448,6 +488,14 @@ 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:

3
pubspec.yaml
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@ -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: