91 lines
1.6 KiB
Go
91 lines
1.6 KiB
Go
package metadata
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import (
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"fmt"
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"log/slog"
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"os"
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"path/filepath"
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"strings"
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"github.com/dhowden/tag"
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)
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type Metadata struct {
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Title *string
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Artist []string
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Album *string
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AlbumArtist []string
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Track int
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TotalTracks int
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Comment *string
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ISRC *string
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Date *string
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}
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func ReadAudioTags(filePath string) (*Metadata, error) {
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ext := strings.ToLower(filepath.Ext(filePath))
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switch {
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case ext == ".flac":
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return readVorbisMetadata(filePath)
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default:
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return readGenericAudioTags(filePath)
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}
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}
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func readGenericAudioTags(filePath string) (*Metadata, error) {
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f, err := os.Open(filePath)
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if err != nil {
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return nil, fmt.Errorf("failed to open file: %w", err)
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}
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defer f.Close()
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m, err := tag.ReadFrom(f)
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if err != nil {
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return nil, fmt.Errorf("failed to read tags: %w", err)
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}
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track, totalTracks := m.Track()
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title := m.Title()
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album := m.Album()
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comment := m.Comment()
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info := &Metadata{
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Title: &title,
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Artist: parseSeperatedTag(m.Artist()),
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Album: &album,
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AlbumArtist: parseSeperatedTag(m.AlbumArtist()),
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Track: track,
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TotalTracks: totalTracks,
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Comment: &comment,
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}
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return info, nil
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}
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func parseSeperatedTag(s string) []string {
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parsed := make([]string, 0)
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for element := range strings.SplitSeq(s, ";") {
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parsed = append(parsed, strings.TrimSpace(element))
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}
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return parsed
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}
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func UpdateMetadata(src, dst string, m Metadata) error {
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ext := strings.ToLower(filepath.Ext(src))
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switch {
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case ext == ".flac":
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return updateFlacMetadata(m, src, dst)
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default:
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slog.Warn("Unsupported format for updating metadata")
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}
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return nil
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}
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