102 lines
3.0 KiB
Dart
102 lines
3.0 KiB
Dart
/// News Providers
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///
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/// State management for news articles using Riverpod.
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/// Provides access to news data and filtering capabilities.
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library;
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import 'package:riverpod_annotation/riverpod_annotation.dart';
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import 'package:worker/features/news/data/datasources/news_local_datasource.dart';
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import 'package:worker/features/news/data/repositories/news_repository_impl.dart';
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import 'package:worker/features/news/domain/entities/news_article.dart';
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import 'package:worker/features/news/domain/repositories/news_repository.dart';
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part 'news_provider.g.dart';
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/// News Local DataSource Provider
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///
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/// Provides instance of NewsLocalDataSource.
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@riverpod
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NewsLocalDataSource newsLocalDataSource(Ref ref) {
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return NewsLocalDataSource();
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}
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/// News Repository Provider
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///
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/// Provides instance of NewsRepository implementation.
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@riverpod
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NewsRepository newsRepository(Ref ref) {
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final localDataSource = ref.watch(newsLocalDataSourceProvider);
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return NewsRepositoryImpl(localDataSource: localDataSource);
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}
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/// News Articles Provider
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///
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/// Fetches all news articles sorted by published date.
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/// Returns AsyncValue<List<NewsArticle>> for proper loading/error handling.
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@riverpod
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Future<List<NewsArticle>> newsArticles(Ref ref) async {
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final repository = ref.watch(newsRepositoryProvider);
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return repository.getAllArticles();
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}
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/// Featured Article Provider
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///
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/// Fetches the featured article for the top section.
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/// Returns AsyncValue<NewsArticle?> (null if no featured article).
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@riverpod
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Future<NewsArticle?> featuredArticle(Ref ref) async {
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final repository = ref.watch(newsRepositoryProvider);
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return repository.getFeaturedArticle();
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}
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/// Selected News Category Provider
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///
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/// Manages the currently selected category filter.
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/// null means "All" is selected (show all categories).
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@riverpod
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class SelectedNewsCategory extends _$SelectedNewsCategory {
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@override
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NewsCategory? build() {
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// Default: show all categories
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return null;
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}
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/// Set selected category
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void setCategory(NewsCategory? category) {
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state = category;
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}
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/// Clear selection (show all)
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void clearSelection() {
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state = null;
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}
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}
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/// Filtered News Articles Provider
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///
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/// Returns news articles filtered by selected category.
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/// If no category is selected, returns all articles.
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@riverpod
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Future<List<NewsArticle>> filteredNewsArticles(Ref ref) async {
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final selectedCategory = ref.watch(selectedNewsCategoryProvider);
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final repository = ref.watch(newsRepositoryProvider);
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// If no category selected, return all articles
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if (selectedCategory == null) {
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return repository.getAllArticles();
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}
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// Filter by selected category
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return repository.getArticlesByCategory(selectedCategory);
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}
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/// News Article by ID Provider
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///
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/// Fetches a specific article by ID.
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/// Used for article detail page.
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@riverpod
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Future<NewsArticle?> newsArticleById(Ref ref, String articleId) async {
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final repository = ref.watch(newsRepositoryProvider);
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return repository.getArticleById(articleId);
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}
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