基础实现代码框架先上，后面慢慢改逻辑

2026-08-23 19:24:16 +08:00
parent 6c4e77ca00
commit 9a60441e04
9 changed files with 446 additions and 1 deletions
@@ -0,0 +1,85 @@
+// lib/metadata/metadata_normalizer.dart
+import 'metadata_model.dart';
+
+class MetadataNormalizer {
+  /// 标准化原始数据（清洗空格、推断、fallback）
+  NormalizedMetadata normalize(RawMetadata raw,
+      {String fileName = '', String filePath = ''}) {
+    // 1. 修剪空格
+    final title = raw.title.trim();
+    final artist = raw.artist.trim();
+    final album = raw.album.trim();
+    final albumArtist = raw.albumArtist.trim();
+
+    // 2. 如果 title 为空，尝试从文件名推断
+    final finalTitle =
+        title.isNotEmpty ? title : _inferTitleFromFileName(fileName);
+
+    // 3. 如果 artist 为空，尝试从路径推断或使用默认值
+    final finalArtist =
+        artist.isNotEmpty ? artist : _inferArtistFromPath(filePath);
+
+    return NormalizedMetadata(
+      title: finalTitle,
+      artist: finalArtist,
+      album: album,
+      albumArtist: albumArtist,
+      composer: raw.composer.trim(),
+      genre: raw.genre.trim(),
+      year: raw.year,
+      trackNumber: raw.trackNumber,
+      discNumber: raw.discNumber,
+      artwork: raw.artwork,
+    );
+  }
+
+  String _inferTitleFromFileName(String fileName) {
+    // 去掉扩展名
+    final dotIndex = fileName.lastIndexOf('.');
+    if (dotIndex > 0) {
+      return fileName.substring(0, dotIndex).trim();
+    }
+    return fileName.trim();
+  }
+
+  String _inferArtistFromPath(String filePath) {
+    // 简单推断：尝试从路径中的文件夹名获取
+    final parts = filePath.split(RegExp(r'[/\\]'));
+    if (parts.length >= 2) {
+      // 倒数第二个文件夹可能是艺术家
+      final candidate = parts[parts.length - 2].trim();
+      if (candidate.isNotEmpty && !candidate.contains(' ')) {
+        return candidate;
+      }
+    }
+    return '未知艺术家';
+  }
+
+  /// 评估候选元数据（第一阶段：直接接受，不纠错）
+  CandidateMetadata evaluate(
+      NormalizedMetadata normalized, List<Map<String, dynamic>> history) {
+    // 第一阶段：置信度固定为 0.8（文件名+标签混合）
+    return CandidateMetadata(
+      metadata: normalized,
+      confidence: 0.8,
+      evidence: {'normalized': 0.8},
+    );
+  }
+
+  /// 决策是否修正（第一阶段：直接接受）
+  FinalMetadata decide(CandidateMetadata candidate, {double threshold = 0.6}) {
+    return FinalMetadata(
+      title: candidate.metadata.title,
+      artist: candidate.metadata.artist,
+      album: candidate.metadata.album,
+      albumArtist: candidate.metadata.albumArtist,
+      composer: candidate.metadata.composer,
+      genre: candidate.metadata.genre,
+      year: candidate.metadata.year,
+      trackNumber: candidate.metadata.trackNumber,
+      discNumber: candidate.metadata.discNumber,
+      artwork: candidate.metadata.artwork,
+      source: 'normalized',
+    );
+  }
+}