Feature Searching News

lib/feature/data/datasource/news/news_remote_data_source.dart

@@ -4,10 +4,15 @@ import 'package:flutter_news_app/feature/data/model/topheadlinesnews/top_headlin
 import 'package:meta/meta.dart';
 
 abstract class NewsRemoteDataSource {
- /// Calls the baseUrl:/v2/top-headlines?category=:category&country=:country&apiKey=:apiKey endpoint
+ /// Calls the [baseUrl]/v2/top-headlines?category=:category&country=:country&apiKey=:apiKey endpoint
  ///
  /// Throws a [DioError] for all error codes.
  Future<TopHeadlinesNewsResponseModel> getTopHeadlinesNews(String category);
+
+ /// Calls the [baseUrl]/v2/top-headlines?country=:country&apiKey=:apiKey&q=:q
+ ///
+ /// Throws a [DioError] for all error codes.
+ Future<TopHeadlinesNewsResponseModel> searchTopHeadlinesNews(String keyword);
 }
 
 class NewsRemoteDataSourceImpl implements NewsRemoteDataSource {
@@ -46,4 +51,21 @@ class NewsRemoteDataSourceImpl implements NewsRemoteDataSource {
  throw DioError();
  }
  }
+
+ @override
+ Future<TopHeadlinesNewsResponseModel> searchTopHeadlinesNews(String keyword) async {
+ var response = await dio.get(
+ '/v2/top-headlines',
+ queryParameters: {
+ 'country': 'id',
+ 'apiKey': constantConfig.apiKeyNewsApi,
+ 'q': keyword,
+ },
+ );
+ if (response.statusCode == 200) {
+ return TopHeadlinesNewsResponseModel.fromJson(response.data);
+ } else {
+ throw DioError();
+ }
+ }
 }

lib/feature/data/repository/news/news_repository_impl.dart

@@ -30,4 +30,19 @@ class NewsRepositoryImpl implements NewsRepository {
  return Left(ConnectionFailure());
  }
  }
+
+ @override
+ Future<Either<Failure, TopHeadlinesNewsResponseModel>> searchTopHeadlinesNews(String keyword) async {
+ var isConnected = await networkInfo.isConnected;
+ if (isConnected) {
+ try {
+ var response = await newsRemoteDataSource.searchTopHeadlinesNews(keyword);
+ return Right(response);
+ } on DioError catch (error) {
+ return Left(ServerFailure(error.message));
+ }
+ } else {
+ return Left(ConnectionFailure());
+ }
+ }
 }

lib/feature/domain/repository/news/news_repository.dart

@@ -6,4 +6,5 @@ abstract class NewsRepository {
 
  Future<Either<Failure, TopHeadlinesNewsResponseModel>> getTopHeadlinesNews(String category);
 
+ Future<Either<Failure, TopHeadlinesNewsResponseModel>> searchTopHeadlinesNews(String keyword);
 }

lib/feature/domain/usecase/searchtopheadlinesnews/search_top_headlines_news.dart

@@ -0,0 +1,32 @@
+import 'package:dartz/dartz.dart';
+import 'package:equatable/equatable.dart';
+import 'package:flutter_news_app/core/error/failure.dart';
+import 'package:flutter_news_app/feature/domain/repository/news/news_repository.dart';
+import 'package:meta/meta.dart';
+import 'package:flutter_news_app/core/usecase/usecase.dart';
+import 'package:flutter_news_app/feature/data/model/topheadlinesnews/top_headlines_news_response_model.dart';
+
+class SearchTopHeadlinesNews implements UseCase<TopHeadlinesNewsResponseModel, ParamsSearchTopHeadlinesNews> {
+ final NewsRepository newsRepository;
+
+ SearchTopHeadlinesNews({@required this.newsRepository});
+
+ @override
+ Future<Either<Failure, TopHeadlinesNewsResponseModel>> call(ParamsSearchTopHeadlinesNews params) async {
+ return await newsRepository.searchTopHeadlinesNews(params.keyword);
+ }
+}
+
+class ParamsSearchTopHeadlinesNews extends Equatable {
+ final String keyword;
+
+ ParamsSearchTopHeadlinesNews({@required this.keyword});
+
+ @override
+ List<Object> get props => [keyword];
+
+ @override
+ String toString() {
+ return 'ParamsSearchTopHeadlinesNews{keyword: $keyword}';
+ }
+}

lib/feature/presentation/bloc/topheadlinesnews/top_headlines_news_bloc.dart

@@ -3,14 +3,20 @@ import 'dart:async';
 import 'package:bloc/bloc.dart';
 import 'package:flutter_news_app/core/error/failure.dart';
 import 'package:flutter_news_app/feature/domain/usecase/gettopheadlinesnews/get_top_headlines_news.dart';
+import 'package:flutter_news_app/feature/domain/usecase/searchtopheadlinesnews/search_top_headlines_news.dart';
 import 'package:meta/meta.dart';
 
 import './bloc.dart';
 
 class TopHeadlinesNewsBloc extends Bloc<TopHeadlinesNewsEvent, TopHeadlinesNewsState> {
  final GetTopHeadlinesNews getTopHeadlinesNews;
+ final SearchTopHeadlinesNews searchTopHeadlinesNews;
 
- TopHeadlinesNewsBloc({@required this.getTopHeadlinesNews}) : assert(getTopHeadlinesNews != null);
+ TopHeadlinesNewsBloc({
+ @required this.getTopHeadlinesNews,
+ @required this.searchTopHeadlinesNews,
+ }) : assert(getTopHeadlinesNews != null),
+ assert(searchTopHeadlinesNews != null);
 
  @override
  TopHeadlinesNewsState get initialState => InitialTopHeadlinesNewsState();
@@ -23,6 +29,8 @@ class TopHeadlinesNewsBloc extends Bloc<TopHeadlinesNewsEvent, TopHeadlinesNewsS
  yield* _mapLoadTopHeadlinesNewsEventToState(event);
  } else if (event is ChangeCategoryTopHeadlinesNewsEvent) {
  yield* _mapChangeCategoryTopHeadlinesNewsEventToState(event);
+ } else if (event is SearchTopHeadlinesNewsEvent) {
+ yield* _mapSearchTopHeadlinesNewsEventToState(event);
  }
  }
 
@@ -47,4 +55,20 @@ class TopHeadlinesNewsBloc extends Bloc<TopHeadlinesNewsEvent, TopHeadlinesNewsS
  ) async* {
  yield ChangedCategoryTopHeadlinesNewsState(indexCategorySelected: event.indexCategorySelected);
  }
+
+ Stream<TopHeadlinesNewsState> _mapSearchTopHeadlinesNewsEventToState(SearchTopHeadlinesNewsEvent event) async* {
+ yield LoadingTopHeadlinesNewsState();
+ var result = await searchTopHeadlinesNews(ParamsSearchTopHeadlinesNews(keyword: event.keyword));
+ yield result.fold(
+ // ignore: missing_return
+ (failure) {
+ if (failure is ServerFailure) {
+ return FailureTopHeadlinesNewsState(errorMessage: failure.errorMessage);
+ } else if (failure is ConnectionFailure) {
+ return FailureTopHeadlinesNewsState(errorMessage: failure.errorMessage);
+ }
+ },
+ (response) => SearchSuccessTopHeadlinesNewsState(listArticles: response.articles),
+ );
+ }
 }

lib/feature/presentation/bloc/topheadlinesnews/top_headlines_news_event.dart

@@ -31,4 +31,18 @@ class ChangeCategoryTopHeadlinesNewsEvent extends TopHeadlinesNewsEvent {
  String toString() {
  return 'ChangeCategoryTopHeadlinesNewsEvent{indexCategorySelected: $indexCategorySelected}';
  }
+}
+
+class SearchTopHeadlinesNewsEvent extends TopHeadlinesNewsEvent {
+ final String keyword;
+
+ SearchTopHeadlinesNewsEvent({@required this.keyword});
+
+ @override
+ List<Object> get props => [keyword];
+
+ @override
+ String toString() {
+ return 'SearchTopHeadlinesNewsEvent{keyword: $keyword}';
+ }
 }

lib/feature/presentation/bloc/topheadlinesnews/top_headlines_news_state.dart

@@ -52,4 +52,18 @@ class ChangedCategoryTopHeadlinesNewsState extends TopHeadlinesNewsState {
  String toString() {
  return 'ChangedCategoryTopHeadlinesNewsState{indexCategorySelected: $indexCategorySelected}';
  }
+}
+
+class SearchSuccessTopHeadlinesNewsState extends TopHeadlinesNewsState {
+ final List<ItemArticleTopHeadlinesNewsResponseModel> listArticles;
+
+ SearchSuccessTopHeadlinesNewsState({this.listArticles});
+
+ @override
+ List<Object> get props => [listArticles];
+
+ @override
+ String toString() {
+ return 'SearchSuccessTopHeadlinesNewsState{listArticles: $listArticles}';
+ }
 }