init

2025-11-17 13:39:05 +08:00
commit d4cfe2b9de
479 changed files with 109324 additions and 0 deletions
--- a/client/lib/features/reading/providers/reading_provider.dart
+++ b/client/lib/features/reading/providers/reading_provider.dart
@@ -0,0 +1,189 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../models/reading_exercise_model.dart';
+import '../services/reading_service.dart';
+
+/// 阅读材料列表状态
+class ReadingMaterialsState {
+  final List<ReadingExercise> materials;
+  final bool isLoading;
+  final String? error;
+
+  ReadingMaterialsState({
+    this.materials = const [],
+    this.isLoading = false,
+    this.error,
+  });
+
+  ReadingMaterialsState copyWith({
+    List<ReadingExercise>? materials,
+    bool? isLoading,
+    String? error,
+  }) {
+    return ReadingMaterialsState(
+      materials: materials ?? this.materials,
+      isLoading: isLoading ?? this.isLoading,
+      error: error,
+    );
+  }
+}
+
+/// 阅读材料列表 Notifier
+class ReadingMaterialsNotifier extends StateNotifier<ReadingMaterialsState> {
+  final ReadingService _readingService;
+
+  ReadingMaterialsNotifier(this._readingService) : super(ReadingMaterialsState());
+
+  /// 加载阅读材料列表
+  Future<void> loadMaterials({
+    String? category,
+    String? difficulty,
+    int page = 1,
+  }) async {
+    state = state.copyWith(isLoading: true, error: null);
+    
+    try {
+      final materials = await _readingService.getArticles(
+        category: category,
+        difficulty: difficulty,
+        page: page,
+      );
+      
+      // 将后端数据转换为前端模型
+      final exercises = materials.map<ReadingExercise>((article) {
+        return ReadingExercise(
+          id: article.id,
+          title: article.title,
+          content: article.content,
+          summary: '', // 后端ReadingArticle没有summary字段
+          type: _mapCategoryToType(article.category),
+          difficulty: _mapDifficultyLevel(article.difficulty),
+          wordCount: article.wordCount,
+          estimatedTime: article.estimatedReadingTime,
+          questions: [], // 题目需要单独获取
+          tags: article.tags, // 已经是List<String>
+          source: article.source,
+          publishDate: article.publishDate,
+          imageUrl: '', // 后端暂无图片字段
+        );
+      }).toList();
+      
+      state = state.copyWith(materials: exercises, isLoading: false);
+    } catch (e) {
+      state = state.copyWith(
+        isLoading: false,
+        error: e.toString(),
+      );
+    }
+  }
+
+  /// 获取推荐材料
+  Future<void> loadRecommendedMaterials() async {
+    state = state.copyWith(isLoading: true, error: null);
+    
+    try {
+      final materials = await _readingService.getRecommendedArticles(limit: 3);
+      
+      final exercises = materials.map<ReadingExercise>((article) {
+        return ReadingExercise(
+          id: article.id,
+          title: article.title,
+          content: article.content,
+          summary: '', // 后端ReadingArticle没有summary字段
+          type: _mapCategoryToType(article.category),
+          difficulty: _mapDifficultyLevel(article.difficulty),
+          wordCount: article.wordCount,
+          estimatedTime: article.estimatedReadingTime,
+          questions: [],
+          tags: article.tags, // 已经是List<String>
+          source: article.source,
+          publishDate: article.publishDate,
+          imageUrl: '', // 后端暂无图片字段
+        );
+      }).toList();
+      
+      state = state.copyWith(materials: exercises, isLoading: false);
+    } catch (e) {
+      state = state.copyWith(
+        isLoading: false,
+        error: e.toString(),
+      );
+    }
+  }
+
+  ReadingExerciseType _mapCategoryToType(String category) {
+    switch (category.toLowerCase()) {
+      case 'news':
+        return ReadingExerciseType.news;
+      case 'story':
+        return ReadingExerciseType.story;
+      case 'science':
+        return ReadingExerciseType.science;
+      case 'business':
+        return ReadingExerciseType.business;
+      case 'technology':
+        return ReadingExerciseType.technology;
+      default:
+        return ReadingExerciseType.news;
+    }
+  }
+
+  ReadingDifficulty _mapDifficultyLevel(String difficulty) {
+    switch (difficulty.toLowerCase()) {
+      case 'beginner':
+      case 'elementary':
+        return ReadingDifficulty.elementary;
+      case 'intermediate':
+        return ReadingDifficulty.intermediate;
+      case 'upper-intermediate':
+      case 'upperintermediate':
+        return ReadingDifficulty.upperIntermediate;
+      case 'advanced':
+        return ReadingDifficulty.advanced;
+      case 'proficient':
+        return ReadingDifficulty.proficient;
+      default:
+        return ReadingDifficulty.intermediate;
+    }
+  }
+}
+
+/// 阅读服务 Provider
+final readingServiceProvider = Provider<ReadingService>((ref) {
+  return ReadingService();
+});
+
+/// 阅读材料列表 Provider
+final readingMaterialsProvider = StateNotifierProvider<ReadingMaterialsNotifier, ReadingMaterialsState>((ref) {
+  final service = ref.watch(readingServiceProvider);
+  return ReadingMaterialsNotifier(service);
+});
+
+/// 推荐阅读材料 Provider
+final recommendedReadingProvider = FutureProvider<List<ReadingExercise>>((ref) async {
+  final service = ref.watch(readingServiceProvider);
+  
+  try {
+    final materials = await service.getRecommendedArticles(limit: 3);
+    
+    return materials.map<ReadingExercise>((article) {
+      return ReadingExercise(
+        id: article.id,
+        title: article.title,
+        content: article.content,
+        summary: '', // 后端ReadingArticle没有summary字段
+        type: ReadingExerciseType.news,
+        difficulty: ReadingDifficulty.intermediate,
+        wordCount: article.wordCount,
+        estimatedTime: article.estimatedReadingTime,
+        questions: [],
+        tags: article.tags, // 已经是List<String>
+        source: article.source,
+        publishDate: article.publishDate,
+        imageUrl: '', // 后端暂无图片字段
+      );
+    }).toList();
+  } catch (e) {
+    // 发生错误时返回空列表
+    return [];
+  }
+});