90 lines
2.8 KiB
Dart
90 lines
2.8 KiB
Dart
// lib/metadata/metadata_normalizer.dart
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import 'metadata_model.dart';
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class MetadataNormalizer {
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NormalizedMetadata normalize(RawMetadata raw,
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{String fileName = '', String filePath = ''}) {
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// 1. 修剪空格
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final title = raw.title.trim();
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final artist = raw.artist.trim();
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final album = raw.album.trim();
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// 2. 如果 title 为空，从文件名推断
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final finalTitle =
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title.isNotEmpty ? title : _inferTitleFromFileName(fileName);
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// 3. 如果 artist 为空，从路径推断或使用默认值
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final finalArtist =
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artist.isNotEmpty ? artist : _inferArtistFromPath(filePath);
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// 4. 如果 performers 不为空且 artist 为空，用 performers 的第一个
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final finalArtist2 = finalArtist.isNotEmpty
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? finalArtist
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: (raw.performers.isNotEmpty ? raw.performers.first : '未知艺术家');
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return NormalizedMetadata(
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title: finalTitle,
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artist: finalArtist2,
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album: album,
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genres: raw.genres,
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performers: raw.performers,
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year: raw.year,
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trackNumber: raw.trackNumber,
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trackTotal: raw.trackTotal,
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discNumber: raw.discNumber,
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totalDisc: raw.totalDisc,
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duration: raw.duration,
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artwork: raw.artwork,
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);
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}
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String _inferTitleFromFileName(String fileName) {
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final dotIndex = fileName.lastIndexOf('.');
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if (dotIndex > 0) {
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return fileName.substring(0, dotIndex).trim();
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}
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return fileName.trim();
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}
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String _inferArtistFromPath(String filePath) {
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final parts = filePath.split(RegExp(r'[/\\]'));
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if (parts.length >= 2) {
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final candidate = parts[parts.length - 2].trim();
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if (candidate.isNotEmpty && !candidate.contains(' ')) {
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return candidate;
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}
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}
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return '未知艺术家';
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}
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CandidateMetadata evaluate(
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NormalizedMetadata normalized, List<Map<String, dynamic>> history) {
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return CandidateMetadata(
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metadata: normalized,
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confidence: 0.8,
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evidence: {'normalized': 0.8},
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);
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}
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FinalMetadata decide(CandidateMetadata candidate, {double threshold = 0.6}) {
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return FinalMetadata(
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title: candidate.metadata.title,
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artist: candidate.metadata.artist,
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album: candidate.metadata.album,
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genre: candidate.metadata.genres.isNotEmpty
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? candidate.metadata.genres.first
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: '',
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genres: candidate.metadata.genres,
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performers: candidate.metadata.performers,
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year: candidate.metadata.year,
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trackNumber: candidate.metadata.trackNumber,
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trackTotal: candidate.metadata.trackTotal,
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discNumber: candidate.metadata.discNumber,
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totalDisc: candidate.metadata.totalDisc,
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duration: candidate.metadata.duration,
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artwork: candidate.metadata.artwork,
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source: 'normalized',
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);
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}
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}
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