125 lines
2.9 KiB
Dart
125 lines
2.9 KiB
Dart
/// 阅读练习类型枚举
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enum ReadingExerciseType {
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news, // 新闻
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story, // 故事
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science, // 科学
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business, // 商务
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culture, // 文化
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technology, // 科技
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health, // 健康
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travel, // 旅游
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}
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/// 阅读难度枚举
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enum ReadingDifficulty {
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elementary, // 初级 A1-A2
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intermediate, // 中级 B1
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upperIntermediate, // 中高级 B2
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advanced, // 高级 C1
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proficient, // 精通 C2
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}
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/// 阅读练习分类
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class ReadingCategory {
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final String id;
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final String name;
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final String description;
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final String icon;
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final int articleCount;
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final ReadingExerciseType type;
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const ReadingCategory({
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required this.id,
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required this.name,
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required this.description,
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required this.icon,
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required this.articleCount,
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required this.type,
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});
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}
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/// 阅读练习
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class ReadingExercise {
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final String id;
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final String title;
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final String content;
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final String summary;
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final ReadingExerciseType type;
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final ReadingDifficulty difficulty;
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final int wordCount;
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final int estimatedTime; // 预估阅读时间（分钟）
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final List<ReadingQuestion> questions;
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final List<String> tags;
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final String source;
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final DateTime publishDate;
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final String imageUrl;
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const ReadingExercise({
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required this.id,
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required this.title,
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required this.content,
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required this.summary,
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required this.type,
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required this.difficulty,
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required this.wordCount,
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required this.estimatedTime,
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required this.questions,
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required this.tags,
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required this.source,
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required this.publishDate,
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required this.imageUrl,
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});
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}
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/// 阅读问题
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class ReadingQuestion {
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final String id;
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final String question;
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final List<String> options;
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final int correctAnswer; // 正确答案的索引
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final String explanation;
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final String type; // multiple_choice, true_false, fill_blank
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const ReadingQuestion({
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required this.id,
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required this.question,
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required this.options,
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required this.correctAnswer,
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required this.explanation,
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required this.type,
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});
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}
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/// 阅读结果
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class ReadingResult {
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final String exerciseId;
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final int correctAnswers;
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final int totalQuestions;
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final int readingTime; // 实际阅读时间（秒）
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final DateTime completedAt;
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final List<UserAnswer> userAnswers;
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const ReadingResult({
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required this.exerciseId,
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required this.correctAnswers,
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required this.totalQuestions,
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required this.readingTime,
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required this.completedAt,
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required this.userAnswers,
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});
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double get accuracy => correctAnswers / totalQuestions;
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}
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/// 用户答案
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class UserAnswer {
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final String questionId;
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final int selectedAnswer;
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final bool isCorrect;
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const UserAnswer({
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required this.questionId,
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required this.selectedAnswer,
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required this.isCorrect,
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});
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} |