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sjk
244
client/lib/features/speaking/models/speaking_stats.dart
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244
client/lib/features/speaking/models/speaking_stats.dart
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import 'speaking_scenario.dart';
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import 'pronunciation_assessment.dart';
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class SpeakingStats {
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final int totalSessions;
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final int totalMinutes;
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final double averageScore;
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final Map<SpeakingScenario, int> scenarioStats;
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final Map<SpeakingDifficulty, int> difficultyStats;
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final List<SpeakingProgressData> progressData;
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final SpeakingSkillAnalysis skillAnalysis;
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final DateTime lastUpdated;
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const SpeakingStats({
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required this.totalSessions,
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required this.totalMinutes,
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required this.averageScore,
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required this.scenarioStats,
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required this.difficultyStats,
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required this.progressData,
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required this.skillAnalysis,
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required this.lastUpdated,
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});
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factory SpeakingStats.fromJson(Map<String, dynamic> json) {
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final scenarioStatsJson = json['scenarioStats'] as Map<String, dynamic>? ?? {};
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final scenarioStats = <SpeakingScenario, int>{};
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for (final scenario in SpeakingScenario.values) {
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final v = scenarioStatsJson[scenario.name];
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scenarioStats[scenario] = (v is num) ? v.toInt() : 0;
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}
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final difficultyStatsLegacy = json['difficultyStats'] as Map<String, dynamic>?;
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final levelStatsBackend = json['stats_by_level'] as Map<String, dynamic>?;
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final difficultyStats = <SpeakingDifficulty, int>{};
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if (difficultyStatsLegacy != null) {
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for (final difficulty in SpeakingDifficulty.values) {
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final v = difficultyStatsLegacy[difficulty.name];
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difficultyStats[difficulty] = (v is num) ? v.toInt() : 0;
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}
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} else {
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for (final difficulty in SpeakingDifficulty.values) {
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final key = {
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SpeakingDifficulty.beginner: 'beginner',
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SpeakingDifficulty.elementary: 'elementary',
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SpeakingDifficulty.intermediate: 'intermediate',
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SpeakingDifficulty.upperIntermediate: 'upper_intermediate',
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SpeakingDifficulty.advanced: 'advanced',
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}[difficulty]!;
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final entry = levelStatsBackend?[key];
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int count = 0;
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if (entry is Map) {
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final c = entry['count'];
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if (c is num) count = c.toInt();
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}
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difficultyStats[difficulty] = count;
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}
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}
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final avgScores = json['average_scores'] as Map<String, dynamic>? ?? {};
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final averageScore = (json['averageScore'] as num?)?.toDouble() ?? (avgScores['overall'] as num?)?.toDouble() ?? 0.0;
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final skillAnalysisJson = json['skillAnalysis'] as Map<String, dynamic>?;
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final skillAnalysis = skillAnalysisJson != null
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? SpeakingSkillAnalysis.fromJson(skillAnalysisJson)
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: SpeakingSkillAnalysis(
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criteriaScores: {
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PronunciationCriteria.accuracy: (avgScores['accuracy'] as num?)?.toDouble() ?? 0.0,
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PronunciationCriteria.fluency: (avgScores['fluency'] as num?)?.toDouble() ?? 0.0,
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PronunciationCriteria.completeness: (avgScores['completeness'] as num?)?.toDouble() ?? 0.0,
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PronunciationCriteria.prosody: (avgScores['prosody'] as num?)?.toDouble() ?? 0.0,
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},
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commonErrors: {},
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strengths: const [],
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weaknesses: const [],
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recommendations: const [],
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improvementRate: 0.0,
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lastAnalyzed: DateTime.now(),
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);
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return SpeakingStats(
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totalSessions: (json['totalSessions'] as int?) ?? (json['total_records'] as num?)?.toInt() ?? 0,
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totalMinutes: (json['totalMinutes'] as int?) ?? (json['total_duration'] as num?)?.toInt() ?? 0,
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averageScore: averageScore,
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scenarioStats: scenarioStats,
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difficultyStats: difficultyStats,
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progressData: (json['progressData'] as List<dynamic>? ?? [])
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.map((e) => SpeakingProgressData.fromJson(e as Map<String, dynamic>))
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.toList(),
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skillAnalysis: skillAnalysis,
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lastUpdated: (json['lastUpdated'] is String)
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? DateTime.parse(json['lastUpdated'] as String)
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: DateTime.now(),
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);
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}
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Map<String, dynamic> toJson() {
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final scenarioStatsJson = <String, int>{};
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for (final entry in scenarioStats.entries) {
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scenarioStatsJson[entry.key.name] = entry.value;
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}
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final difficultyStatsJson = <String, int>{};
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for (final entry in difficultyStats.entries) {
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difficultyStatsJson[entry.key.name] = entry.value;
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}
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return {
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'totalSessions': totalSessions,
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'totalMinutes': totalMinutes,
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'averageScore': averageScore,
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'scenarioStats': scenarioStatsJson,
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'difficultyStats': difficultyStatsJson,
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'progressData': progressData.map((e) => e.toJson()).toList(),
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'skillAnalysis': skillAnalysis.toJson(),
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'lastUpdated': lastUpdated.toIso8601String(),
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};
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}
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}
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class SpeakingProgressData {
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final DateTime date;
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final double averageScore;
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final int sessionCount;
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final int totalMinutes;
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final Map<PronunciationCriteria, double> criteriaScores;
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const SpeakingProgressData({
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required this.date,
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required this.averageScore,
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required this.sessionCount,
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required this.totalMinutes,
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required this.criteriaScores,
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});
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factory SpeakingProgressData.fromJson(Map<String, dynamic> json) {
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final criteriaScoresJson = json['criteriaScores'] as Map<String, dynamic>? ?? {};
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final criteriaScores = <PronunciationCriteria, double>{};
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for (final criteria in PronunciationCriteria.values) {
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criteriaScores[criteria] = (criteriaScoresJson[criteria.name] as num?)?.toDouble() ?? 0.0;
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}
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return SpeakingProgressData(
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date: DateTime.parse(json['date'] as String),
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averageScore: (json['averageScore'] as num).toDouble(),
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sessionCount: (json['sessionCount'] as num).toInt(),
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totalMinutes: (json['totalMinutes'] as num).toInt(),
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criteriaScores: criteriaScores,
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);
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}
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Map<String, dynamic> toJson() {
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final criteriaScoresJson = <String, double>{};
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for (final entry in criteriaScores.entries) {
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criteriaScoresJson[entry.key.name] = entry.value;
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}
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return {
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'date': date.toIso8601String(),
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'averageScore': averageScore,
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'sessionCount': sessionCount,
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'totalMinutes': totalMinutes,
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'criteriaScores': criteriaScoresJson,
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};
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}
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}
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class SpeakingSkillAnalysis {
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final Map<PronunciationCriteria, double> criteriaScores;
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final Map<String, int> commonErrors;
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final List<String> strengths;
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final List<String> weaknesses;
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final List<String> recommendations;
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final double improvementRate; // 改进速度
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final DateTime lastAnalyzed;
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const SpeakingSkillAnalysis({
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required this.criteriaScores,
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required this.commonErrors,
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required this.strengths,
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required this.weaknesses,
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required this.recommendations,
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required this.improvementRate,
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required this.lastAnalyzed,
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});
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factory SpeakingSkillAnalysis.fromJson(Map<String, dynamic> json) {
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final criteriaScoresJson = json['criteriaScores'] as Map<String, dynamic>? ?? {};
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final criteriaScores = <PronunciationCriteria, double>{};
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for (final criteria in PronunciationCriteria.values) {
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criteriaScores[criteria] = (criteriaScoresJson[criteria.name] as num?)?.toDouble() ?? 0.0;
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}
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return SpeakingSkillAnalysis(
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criteriaScores: criteriaScores,
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commonErrors: Map<String, int>.from(json['commonErrors'] ?? {}),
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strengths: List<String>.from(json['strengths'] ?? []),
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weaknesses: List<String>.from(json['weaknesses'] ?? []),
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recommendations: List<String>.from(json['recommendations'] ?? []),
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improvementRate: (json['improvementRate'] as num?)?.toDouble() ?? 0.0,
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lastAnalyzed: (json['lastAnalyzed'] is String)
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? DateTime.parse(json['lastAnalyzed'] as String)
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: DateTime.now(),
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);
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}
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Map<String, dynamic> toJson() {
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final criteriaScoresJson = <String, double>{};
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for (final entry in criteriaScores.entries) {
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criteriaScoresJson[entry.key.name] = entry.value;
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}
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return {
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'criteriaScores': criteriaScoresJson,
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'commonErrors': commonErrors,
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'strengths': strengths,
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'weaknesses': weaknesses,
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'recommendations': recommendations,
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'improvementRate': improvementRate,
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'lastAnalyzed': lastAnalyzed.toIso8601String(),
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};
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}
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String get overallLevel {
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final averageScore = criteriaScores.values.reduce((a, b) => a + b) / criteriaScores.length;
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if (averageScore >= 90) return '优秀';
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if (averageScore >= 80) return '良好';
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if (averageScore >= 70) return '中等';
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if (averageScore >= 60) return '及格';
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return '需要改进';
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}
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PronunciationCriteria get strongestSkill {
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return criteriaScores.entries
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.reduce((a, b) => a.value > b.value ? a : b)
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.key;
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}
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PronunciationCriteria get weakestSkill {
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return criteriaScores.entries
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.reduce((a, b) => a.value < b.value ? a : b)
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.key;
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}
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}
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