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 +1,210 @@
+import 'dart:async';
+import 'package:flutter/material.dart';
+import '../../../core/network/api_client.dart';
+import '../../../core/theme/app_theme.dart';
+import '../widgets/news_card_item.dart';
+import '../widgets/advanced_news_filter_bar.dart';
+
+/// Paginated Infinite Scroll Daily News Feed screen with deduplication and strict chronological sorting.
+class NewsFeedScreen extends StatefulWidget {
+  final ApiClient apiClient;
+
+  const NewsFeedScreen({super.key, required this.apiClient});
+
+  @override
+  State<NewsFeedScreen> createState() => _NewsFeedScreenState();
+}
+
+class _NewsFeedScreenState extends State<NewsFeedScreen> {
+  final ScrollController _scrollController = ScrollController();
+  final List<dynamic> _newsItems = [];
+  int _currentPage = 1;
+  static const int _pageSize = 15;
+  bool _isLoading = false;
+  bool _hasMore = true;
+
+  // Filter States
+  String? _searchQuery;
+  DateTime? _selectedDate;
+  String? _selectedIsin;
+  bool _hasSentimentOnly = false;
+  
+  Timer? _debounceTimer;
+
+  @override
+  void initState() {
+    super.initState();
+    _loadNews(refresh: true);
+    _scrollController.addListener(() {
+      if (_scrollController.position.pixels >= _scrollController.position.maxScrollExtent - 200) {
+        _loadNews();
+      }
+    });
+  }
+
+  @override
+  void dispose() {
+    _debounceTimer?.cancel();
+    _scrollController.dispose();
+    super.dispose();
+  }
+
+  DateTime _parseDateTime(dynamic val) {
+    if (val == null) return DateTime.fromMillisecondsSinceEpoch(0);
+    final str = val.toString().trim();
+    if (str.isEmpty) return DateTime.fromMillisecondsSinceEpoch(0);
+    try {
+      return DateTime.parse(str).toUtc();
+    } catch (_) {
+      return DateTime.fromMillisecondsSinceEpoch(0);
+    }
+  }
+
+  Future<void> _loadNews({bool refresh = false}) async {
+    if (_isLoading) return;
+    if (refresh) {
+      _currentPage = 1;
+      _hasMore = true;
+      _newsItems.clear();
+    }
+    if (!_hasMore) return;
+
+    setState(() => _isLoading = true);
+
+    try {
+      final queryParams = <String, dynamic>{
+        'page': _currentPage,
+        'pageSize': _pageSize,
+      };
+
+      if (_selectedDate != null) {
+        queryParams['date'] = _selectedDate!.toIso8601String().substring(0, 10);
+      }
+      if (_searchQuery != null && _searchQuery!.trim().isNotEmpty) {
+        queryParams['query'] = _searchQuery!.trim();
+      }
+      if (_selectedIsin != null && _selectedIsin!.trim().isNotEmpty) {
+        queryParams['isin'] = _selectedIsin!.trim();
+      }
+      if (_hasSentimentOnly) {
+        queryParams['hasSentiment'] = true;
+      }
+
+      final res = await widget.apiClient.get('/api/v1/news', queryParameters: queryParams);
+
+      if (res.statusCode == 200 && res.data != null && res.data is List) {
+        final List fetched = res.data as List;
+        setState(() {
+          // Deduplicate by ID
+          final existingIds = _newsItems.map((e) => e['id'] ?? e['Id']).where((id) => id != null).toSet();
+          for (final item in fetched) {
+            final id = item['id'] ?? item['Id'];
+            if (id == null || !existingIds.contains(id)) {
+              _newsItems.add(item);
+              if (id != null) existingIds.add(id);
+            }
+          }
+
+          // Re-sort strictly by publication timestamp descending (newest articles at the top)
+          _newsItems.sort((a, b) {
+            final dtA = _parseDateTime(a['publishedAt'] ?? a['PublishedAt'] ?? a['scrapedAt'] ?? a['ScrapedAt']);
+            final dtB = _parseDateTime(b['publishedAt'] ?? b['PublishedAt'] ?? b['scrapedAt'] ?? b['ScrapedAt']);
+            return dtB.compareTo(dtA);
+          });
+
+          _currentPage++;
+          if (fetched.length < _pageSize) {
+            _hasMore = false;
+          }
+        });
+      }
+    } catch (_) {
+      // Handle error visually if necessary, currently silent fallback
+    } finally {
+      setState(() => _isLoading = false);
+    }
+  }
+
+  void _onSearchChanged(String? val) {
+    _searchQuery = val;
+    _debounceTimer?.cancel();
+    _debounceTimer = Timer(const Duration(milliseconds: 600), () {
+      _loadNews(refresh: true);
+    });
+  }
+
+  void _onIsinChanged(String? val) {
+    _selectedIsin = val;
+    _debounceTimer?.cancel();
+    _debounceTimer = Timer(const Duration(milliseconds: 600), () {
+      _loadNews(refresh: true);
+    });
+  }
+
+  void _resetFilters() {
+    _debounceTimer?.cancel();
+    setState(() {
+      _searchQuery = null;
+      _selectedDate = null;
+      _selectedIsin = null;
+      _hasSentimentOnly = false;
+    });
+    _loadNews(refresh: true);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Padding(
+        padding: const EdgeInsets.all(20),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            const Text('Marktnachrichten & Feed', style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold)),
+            const SizedBox(height: 12),
+            AdvancedNewsFilterBar(
+              searchQuery: _searchQuery,
+              selectedDate: _selectedDate,
+              selectedIsin: _selectedIsin,
+              hasSentimentOnly: _hasSentimentOnly,
+              onSearchChanged: _onSearchChanged,
+              onIsinChanged: _onIsinChanged,
+              onDateChanged: (val) {
+                setState(() => _selectedDate = val);
+                _loadNews(refresh: true);
+              },
+              onSentimentToggleChanged: (val) {
+                setState(() => _hasSentimentOnly = val);
+                _loadNews(refresh: true);
+              },
+              onResetFilters: _resetFilters,
+            ),
+            const SizedBox(height: 16),
+            Expanded(
+              child: _newsItems.isEmpty && !_isLoading
+                  ? Center(
+                      child: Text('Keine Nachrichten für diese Filterkriterien gefunden.', style: TextStyle(color: AppTheme.textMuted)),
+                    )
+                  : ListView.builder(
+                      controller: _scrollController,
+                      itemCount: _newsItems.length + (_hasMore ? 1 : 0),
+                      itemBuilder: (context, index) {
+                        if (index == _newsItems.length) {
+                          return Center(
+                            child: Padding(
+                              padding: const EdgeInsets.all(16),
+                              child: CircularProgressIndicator(color: AppTheme.primaryEmerald),
+                            ),
+                          );
+                        }
+                        return NewsCardItem(item: _newsItems[index], apiClient: widget.apiClient);
+                      },
+                    ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+