init

client/lib/features/reading/models/reading_article.dart

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+class ReadingArticle {
+  final String id;
+  final String title;
+  final String content;
+  final String category;
+  final String difficulty;
+  final int wordCount;
+  final int estimatedReadingTime; // in minutes
+  final List<String> tags;
+  final String source;
+  final DateTime publishDate;
+  final bool isCompleted;
+  final double? comprehensionScore;
+  final int? readingTime; // actual reading time in seconds
+
+  const ReadingArticle({
+    required this.id,
+    required this.title,
+    required this.content,
+    required this.category,
+    required this.difficulty,
+    required this.wordCount,
+    required this.estimatedReadingTime,
+    required this.tags,
+    required this.source,
+    required this.publishDate,
+    this.isCompleted = false,
+    this.comprehensionScore,
+    this.readingTime,
+  });
+
+  factory ReadingArticle.fromJson(Map<String, dynamic> json) {
+    return ReadingArticle(
+      id: json['id'] as String,
+      title: json['title'] as String,
+      content: json['content'] as String,
+      category: json['category'] as String,
+      difficulty: json['difficulty'] as String,
+      wordCount: json['wordCount'] as int,
+      estimatedReadingTime: json['estimatedReadingTime'] as int,
+      tags: List<String>.from(json['tags'] as List),
+      source: json['source'] as String,
+      publishDate: DateTime.parse(json['publishDate'] as String),
+      isCompleted: json['isCompleted'] as bool? ?? false,
+      comprehensionScore: json['comprehensionScore'] as double?,
+      readingTime: json['readingTime'] as int?,
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'id': id,
+      'title': title,
+      'content': content,
+      'category': category,
+      'difficulty': difficulty,
+      'wordCount': wordCount,
+      'estimatedReadingTime': estimatedReadingTime,
+      'tags': tags,
+      'source': source,
+      'publishDate': publishDate.toIso8601String(),
+      'isCompleted': isCompleted,
+      'comprehensionScore': comprehensionScore,
+      'readingTime': readingTime,
+    };
+  }
+
+  ReadingArticle copyWith({
+    String? id,
+    String? title,
+    String? content,
+    String? category,
+    String? difficulty,
+    int? wordCount,
+    int? estimatedReadingTime,
+    List<String>? tags,
+    String? source,
+    DateTime? publishDate,
+    bool? isCompleted,
+    double? comprehensionScore,
+    int? readingTime,
+  }) {
+    return ReadingArticle(
+      id: id ?? this.id,
+      title: title ?? this.title,
+      content: content ?? this.content,
+      category: category ?? this.category,
+      difficulty: difficulty ?? this.difficulty,
+      wordCount: wordCount ?? this.wordCount,
+      estimatedReadingTime: estimatedReadingTime ?? this.estimatedReadingTime,
+      tags: tags ?? this.tags,
+      source: source ?? this.source,
+      publishDate: publishDate ?? this.publishDate,
+      isCompleted: isCompleted ?? this.isCompleted,
+      comprehensionScore: comprehensionScore ?? this.comprehensionScore,
+      readingTime: readingTime ?? this.readingTime,
+    );
+  }
+
+  String get difficultyLabel {
+    switch (difficulty.toLowerCase()) {
+      case 'a1':
+      case 'a2':
+        return '初级';
+      case 'b1':
+      case 'b2':
+        return '中级';
+      case 'c1':
+      case 'c2':
+        return '高级';
+      default:
+        return '未知';
+    }
+  }
+
+  String get categoryLabel {
+    switch (category.toLowerCase()) {
+      case 'cet4':
+        return '四级阅读';
+      case 'cet6':
+        return '六级阅读';
+      case 'toefl':
+        return '托福阅读';
+      case 'ielts':
+        return '雅思阅读';
+      case 'daily':
+        return '日常阅读';
+      case 'business':
+        return '商务阅读';
+      case 'academic':
+        return '学术阅读';
+      case 'news':
+        return '新闻阅读';
+      default:
+        return category;
+    }
+  }
+}