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This commit is contained in:
sjk
168
client/lib/features/writing/services/writing_record_service.dart
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168
client/lib/features/writing/services/writing_record_service.dart
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import 'dart:convert';
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import 'package:shared_preferences/shared_preferences.dart';
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import '../models/writing_record.dart';
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/// 写作记录管理服务
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class WritingRecordService {
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static const String _recordsKey = 'writing_records';
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/// 保存写作记录
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static Future<void> saveRecord(WritingRecord record) async {
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final prefs = await SharedPreferences.getInstance();
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final records = await getRecords();
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records.add(record);
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final recordsJson = records.map((r) => r.toJson()).toList();
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await prefs.setString(_recordsKey, jsonEncode(recordsJson));
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}
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/// 获取所有写作记录
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static Future<List<WritingRecord>> getRecords() async {
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final prefs = await SharedPreferences.getInstance();
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final recordsString = prefs.getString(_recordsKey);
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if (recordsString == null) {
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return [];
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}
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try {
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final recordsJson = jsonDecode(recordsString) as List;
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return recordsJson.map((json) => WritingRecord.fromJson(json)).toList();
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} catch (e) {
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return [];
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}
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}
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/// 获取最近的写作记录
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static Future<List<WritingRecord>> getRecentRecords({int limit = 5}) async {
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final records = await getRecords();
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records.sort((a, b) => b.completedAt.compareTo(a.completedAt));
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return records.take(limit).toList();
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}
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/// 根据ID获取写作记录
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static Future<WritingRecord?> getRecordById(String id) async {
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final records = await getRecords();
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try {
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return records.firstWhere((record) => record.id == id);
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} catch (e) {
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return null;
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}
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}
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/// 删除写作记录
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static Future<void> deleteRecord(String id) async {
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final prefs = await SharedPreferences.getInstance();
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final records = await getRecords();
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records.removeWhere((record) => record.id == id);
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final recordsJson = records.map((r) => r.toJson()).toList();
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await prefs.setString(_recordsKey, jsonEncode(recordsJson));
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}
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/// 获取写作统计数据
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static Future<Map<String, dynamic>> getStatistics() async {
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final records = await getRecords();
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if (records.isEmpty) {
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return {
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'totalCount': 0,
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'averageScore': 0,
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'totalTimeUsed': 0,
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'averageWordCount': 0,
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};
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}
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final totalScore = records.fold<int>(0, (sum, record) => sum + record.score);
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final totalTimeUsed = records.fold<int>(0, (sum, record) => sum + record.timeUsed);
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final totalWordCount = records.fold<int>(0, (sum, record) => sum + record.wordCount);
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return {
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'totalCount': records.length,
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'averageScore': (totalScore / records.length).round(),
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'totalTimeUsed': totalTimeUsed,
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'averageWordCount': (totalWordCount / records.length).round(),
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};
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}
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/// 清空所有记录（用于测试）
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static Future<void> clearAllRecords() async {
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final prefs = await SharedPreferences.getInstance();
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await prefs.remove(_recordsKey);
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}
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/// 添加一些示例数据（用于演示）
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static Future<void> addSampleData() async {
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final now = DateTime.now();
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final sampleRecords = [
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WritingRecord(
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id: 'record_1',
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taskId: 'essay_1',
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taskTitle: '市场调研报告',
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taskDescription: '撰写一份关于新产品市场前景的调研报告。',
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content: '随着科技的不断发展，智能手表市场呈现出强劲的增长势头。根据最新的市场调研数据显示，全球智能手表市场规模预计在未来五年内将保持年均15%的增长率。消费者对健康监测、运动追踪等功能的需求日益增长，为智能手表产品提供了广阔的市场空间。建议公司抓住这一机遇，加大研发投入，推出具有竞争力的产品。',
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wordCount: 156,
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timeUsed: 1800, // 30分钟
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score: 90,
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completedAt: now.subtract(const Duration(days: 1)),
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feedback: {
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'content': '内容丰富，主题明确，论述清晰。',
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'contentScore': 88,
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'grammar': '语法使用准确，句式多样。',
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'grammarScore': 92,
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'vocabulary': '词汇运用恰当，表达准确。',
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'vocabularyScore': 89,
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'structure': '文章结构清晰，逻辑性强。',
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'structureScore': 91,
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},
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),
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WritingRecord(
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id: 'record_2',
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taskId: 'letter_1',
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taskTitle: '我的理想房屋',
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taskDescription: '描述你心目中理想房屋的样子。',
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content: '我理想中的房屋坐落在一个安静的社区里，周围绿树成荫，环境优美。房屋采用现代简约风格设计，外观简洁大方。内部布局合理，包括宽敞的客厅、舒适的卧室、功能齐全的厨房和书房。特别是书房，我希望有一面大大的书墙，可以收藏我喜爱的书籍。房屋还应该有一个小花园，种植各种花草，让生活更加贴近自然。',
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wordCount: 142,
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timeUsed: 1200, // 20分钟
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score: 89,
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completedAt: now.subtract(const Duration(days: 2)),
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feedback: {
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'content': '内容充实，描述生动。',
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'contentScore': 87,
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'grammar': '语法基本正确，表达流畅。',
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'grammarScore': 90,
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'vocabulary': '词汇使用恰当，描述性强。',
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'vocabularyScore': 88,
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'structure': '结构清晰，层次分明。',
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'structureScore': 92,
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},
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),
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WritingRecord(
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id: 'record_3',
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taskId: 'review_1',
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taskTitle: '电影评论',
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taskDescription: '写一篇关于最近观看电影的评论。',
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content: '最近观看了《流浪地球2》这部科幻电影，给我留下了深刻的印象。影片在视觉效果方面表现出色，宏大的场面和精细的特效让人震撼。故事情节紧凑，人物刻画也比较丰满。特别是对人类面临危机时的团结精神的展现，很有感染力。不过，部分情节的发展略显仓促，希望能有更多的细节描述。总的来说，这是一部值得推荐的优秀科幻电影。',
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wordCount: 138,
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timeUsed: 1500, // 25分钟
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score: 92,
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completedAt: now.subtract(const Duration(hours: 12)),
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feedback: {
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'content': '评论客观全面，观点明确。',
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'contentScore': 90,
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'grammar': '语法准确，表达自然。',
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'grammarScore': 93,
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'vocabulary': '词汇丰富，用词精准。',
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'vocabularyScore': 91,
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'structure': '结构合理，逻辑清晰。',
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'structureScore': 94,
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},
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),
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];
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for (final record in sampleRecords) {
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await saveRecord(record);
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}
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}
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}
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242
client/lib/features/writing/services/writing_service.dart
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242
client/lib/features/writing/services/writing_service.dart
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import '../models/writing_task.dart';
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import '../models/writing_submission.dart';
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import '../models/writing_stats.dart';
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import '../../../core/network/api_client.dart';
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import '../../../core/network/api_endpoints.dart';
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import '../../../core/services/enhanced_api_service.dart';
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import '../../../core/models/api_response.dart';
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import '../models/writing_task.dart';
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import '../models/writing_submission.dart';
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import '../models/writing_stats.dart';
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/// 写作训练服务
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class WritingService {
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final EnhancedApiService _enhancedApiService = EnhancedApiService();
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// 缓存时长配置
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static const Duration _shortCacheDuration = Duration(minutes: 5);
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static const Duration _longCacheDuration = Duration(hours: 1);
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/// 获取写作任务列表
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Future<List<WritingTask>> getWritingTasks({
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WritingType? type,
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WritingDifficulty? difficulty,
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int page = 1,
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int limit = 20,
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bool forceRefresh = false,
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}) async {
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try {
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final response = await _enhancedApiService.get<List<WritingTask>>(
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ApiEndpoints.writingPrompts,
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queryParameters: {
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'page': page,
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'limit': limit,
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if (type != null) 'type': type.name,
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if (difficulty != null) 'difficulty': difficulty.name,
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},
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useCache: !forceRefresh,
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cacheDuration: _shortCacheDuration,
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fromJson: (data) {
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final List<dynamic> list = data['data'] ?? [];
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return list.map((json) => WritingTask.fromJson(json)).toList();
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},
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);
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if (response.success && response.data != null) {
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return response.data!;
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} else {
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throw Exception(response.message);
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}
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} catch (e) {
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throw Exception('获取写作任务失败: $e');
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}
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}
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/// 获取单个写作任务详情
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Future<WritingTask> getWritingTask(String taskId) async {
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try {
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final response = await _enhancedApiService.get<WritingTask>(
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'${ApiEndpoints.writingPrompts}/$taskId',
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cacheDuration: _longCacheDuration,
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fromJson: (data) => WritingTask.fromJson(data['data']),
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);
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if (response.success && response.data != null) {
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return response.data!;
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} else {
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throw Exception(response.message);
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}
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} catch (e) {
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throw Exception('获取写作任务详情失败: $e');
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}
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}
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/// 提交写作作业
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Future<WritingSubmission> submitWriting({
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required String taskId,
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required String userId,
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required String content,
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required int timeSpent,
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required int wordCount,
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}) async {
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try {
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final response = await _enhancedApiService.post<WritingSubmission>(
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ApiEndpoints.writingSubmissions,
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data: {
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'prompt_id': taskId,
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'user_id': userId,
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'content': content,
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'time_spent': timeSpent,
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'word_count': wordCount,
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},
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fromJson: (data) => WritingSubmission.fromJson(data['data']),
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);
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if (response.success && response.data != null) {
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return response.data!;
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} else {
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throw Exception(response.message);
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}
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} catch (e) {
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throw Exception('提交写作作业失败: $e');
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}
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}
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/// 获取用户写作历史
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Future<List<WritingSubmission>> getUserWritingHistory({
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required String userId,
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int page = 1,
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int limit = 20,
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bool forceRefresh = false,
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}) async {
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try {
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final response = await _enhancedApiService.get<List<WritingSubmission>>(
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ApiEndpoints.writingSubmissions,
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queryParameters: {
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'page': page,
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'limit': limit,
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},
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useCache: !forceRefresh,
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cacheDuration: _shortCacheDuration,
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fromJson: (data) {
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final List<dynamic> list = data['data'] ?? [];
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return list.map((json) => WritingSubmission.fromJson(json)).toList();
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},
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);
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if (response.success && response.data != null) {
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return response.data!;
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} else {
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throw Exception(response.message);
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}
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} catch (e) {
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throw Exception('获取写作历史失败: $e');
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}
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}
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/// 获取用户写作统计
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Future<WritingStats> getUserWritingStats(String userId, {bool forceRefresh = false}) async {
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try {
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final response = await _enhancedApiService.get<WritingStats>(
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ApiEndpoints.writingStats,
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useCache: !forceRefresh,
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cacheDuration: _shortCacheDuration,
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fromJson: (data) => WritingStats.fromJson(data['data']),
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);
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if (response.success && response.data != null) {
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return response.data!;
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} else {
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throw Exception(response.message);
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}
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} catch (e) {
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throw Exception('获取写作统计失败: $e');
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}
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}
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/// 获取写作反馈
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Future<WritingSubmission> getWritingFeedback(String submissionId) async {
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try {
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final response = await _enhancedApiService.get<WritingSubmission>(
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'${ApiEndpoints.writingSubmissions}/$submissionId',
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cacheDuration: _shortCacheDuration,
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fromJson: (data) => WritingSubmission.fromJson(data['data']),
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);
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if (response.success && response.data != null) {
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return response.data!;
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} else {
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throw Exception(response.message);
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}
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} catch (e) {
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throw Exception('获取写作反馈失败: $e');
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}
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}
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/// 搜索写作任务
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Future<List<WritingTask>> searchWritingTasks({
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required String query,
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WritingType? type,
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WritingDifficulty? difficulty,
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int page = 1,
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int limit = 20,
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bool forceRefresh = false,
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}) async {
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try {
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final response = await _enhancedApiService.get<List<WritingTask>>(
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'${ApiEndpoints.writingPrompts}/search',
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queryParameters: {
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'q': query,
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'page': page,
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'limit': limit,
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if (type != null) 'type': type.name,
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if (difficulty != null) 'difficulty': difficulty.name,
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},
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useCache: !forceRefresh,
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cacheDuration: _shortCacheDuration,
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fromJson: (data) {
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final List<dynamic> list = data['data'] ?? [];
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return list.map((json) => WritingTask.fromJson(json)).toList();
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},
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);
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if (response.success && response.data != null) {
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return response.data!;
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} else {
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throw Exception(response.message);
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}
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} catch (e) {
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throw Exception('搜索写作任务失败: $e');
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}
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}
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/// 获取推荐的写作任务
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Future<List<WritingTask>> getRecommendedWritingTasks({
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required String userId,
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int limit = 10,
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bool forceRefresh = false,
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}) async {
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try {
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final response = await _enhancedApiService.get<List<WritingTask>>(
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'${ApiEndpoints.writingPrompts}/recommendations',
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queryParameters: {
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'limit': limit,
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},
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useCache: !forceRefresh,
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cacheDuration: _shortCacheDuration,
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fromJson: (data) {
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final List<dynamic> list = data['data'] ?? [];
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return list.map((json) => WritingTask.fromJson(json)).toList();
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},
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);
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if (response.success && response.data != null) {
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return response.data!;
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} else {
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throw Exception(response.message);
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}
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} catch (e) {
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throw Exception('获取推荐写作任务失败: $e');
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}
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}
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}
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