feat(App): update Finlytic Flutter app UI and blocs

2026-08-09 21:01:46 +02:00
parent e7427b7464
commit a708d2977c
591 changed files with 1095105 additions and 0 deletions
@@ -0,0 +1,108 @@
+import 'dart:async';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:finlytic_app/features/news/repositories/news_repository.dart';
+import 'news_event.dart';
+import 'news_state.dart';
+
+class NewsBloc extends Bloc<NewsEvent, NewsState> {
+  final NewsRepository repository;
+  static const int pageSize = 20;
+  StreamSubscription? _liveNewsSubscription;
+
+  NewsBloc({required this.repository}) : super(NewsInitial()) {
+    on<FetchNews>(_onFetchNews);
+    on<LoadMoreNews>(_onLoadMoreNews);
+    on<ReceiveLiveNews>(_onReceiveLiveNews);
+
+    // Subscribe to live news from SignalR
+    _liveNewsSubscription = repository.liveNewsStream.listen((article) {
+      add(ReceiveLiveNews(article));
+    });
+    
+    // Connect to SignalR
+    repository.connectToLiveFeed();
+  }
+
+  Future<void> _onFetchNews(FetchNews event, Emitter<NewsState> emit) async {
+    try {
+      emit(NewsLoading());
+      final articles = await repository.fetchNews(
+        page: 1,
+        pageSize: pageSize,
+        symbol: event.symbol,
+        isin: event.isin,
+        date: event.date,
+      );
+      
+      emit(NewsLoaded(
+        articles: articles,
+        hasReachedMax: articles.length < pageSize,
+        currentPage: 1,
+        symbol: event.symbol,
+        isin: event.isin,
+        date: event.date,
+      ));
+    } catch (e) {
+      emit(NewsError("Failed to fetch news. Please try again."));
+    }
+  }
+
+  Future<void> _onLoadMoreNews(LoadMoreNews event, Emitter<NewsState> emit) async {
+    if (state is NewsLoaded) {
+      final currentState = state as NewsLoaded;
+      if (currentState.hasReachedMax) return;
+
+      try {
+        final nextPage = currentState.currentPage + 1;
+        final articles = await repository.fetchNews(
+          page: nextPage,
+          pageSize: pageSize,
+          symbol: currentState.symbol,
+          isin: currentState.isin,
+          date: currentState.date,
+        );
+
+        if (articles.isEmpty) {
+          emit(currentState.copyWith(hasReachedMax: true));
+        } else {
+          emit(NewsLoaded(
+            articles: currentState.articles + articles,
+            hasReachedMax: articles.length < pageSize,
+            currentPage: nextPage,
+            symbol: currentState.symbol,
+            isin: currentState.isin,
+            date: currentState.date,
+          ));
+        }
+      } catch (e) {
+        emit(NewsError("Failed to load more news."));
+      }
+    }
+  }
+
+  void _onReceiveLiveNews(ReceiveLiveNews event, Emitter<NewsState> emit) {
+    if (state is NewsLoaded) {
+      final currentState = state as NewsLoaded;
+      
+      // Check if the article matches current filters before prepending
+      bool matchesFilter = true;
+      if (currentState.symbol != null || currentState.isin != null) {
+        // Needs proper matching logic if needed, but for now we prepend if there's no filter or if it matches
+        // Assuming we prepend it regardless for live feed, or we could filter based on MatchedAssets if added to model.
+      }
+      
+      if (matchesFilter) {
+        // Prepend new article to the top of the list!
+        final updatedArticles = [event.article, ...currentState.articles];
+        emit(currentState.copyWith(articles: updatedArticles));
+      }
+    }
+  }
+
+  @override
+  Future<void> close() {
+    _liveNewsSubscription?.cancel();
+    repository.dispose();
+    return super.close();
+  }
+}