func (tp TracksProcessor) Process(t track.Track) error {
// Download track
ui.Println("Downloading " + t.Artist() + " - " + t.Title())
trackPath := filepath.Join(tp.DownloadFolder, t.Filename())
if _, e := os.Create(trackPath); e != nil {
return fmt.Errorf("couldn't create track file:", e)
}
if e := downloadTrack(t, trackPath); e != nil {
return fmt.Errorf("couldn't download track:", e)
}
// err lets us to not prevent the processing of track further.
var err error
// Download artwork
var artworkPath string
var artworkBytes []byte
artworkFile, e := ioutil.TempFile("", "")
if e != nil {
err = fmt.Errorf("couldn't create artwork file:", e)
} else {
artworkPath = artworkFile.Name()
if e = downloadArtwork(t, artworkPath); e != nil {
err = fmt.Errorf("couldn't download artwork file:", e)
}
if err == nil {
artworkBytes, e = ioutil.ReadAll(artworkFile)
if e != nil {
err = fmt.Errorf("couldn't read artwork file:", e)
}
}
}
// Tag track
if e := tag(t, trackPath, artworkBytes); e != nil {
err = fmt.Errorf("coudln't tag file:", e)
}
// Delete artwork
if e := artworkFile.Close(); e != nil {
err = fmt.Errorf("couldn't close artwork file:", e)
}
if e := os.Remove(artworkPath); e != nil {
err = fmt.Errorf("couldn't remove artwork file:", e)
}
// Add to iTunes
if tp.ItunesPlaylist != "" {
ui.Println("Adding to iTunes")
if e := applescript.AddTrackToPlaylist(trackPath, tp.ItunesPlaylist); e != nil {
err = fmt.Errorf("couldn't add track to playlist:", e)
}
}
return err
}
func tag(t track.Track, trackPath string, artwork []byte) error {
tag, err := id3v2.Open(trackPath)
if err != nil {
return err
}
defer tag.Close()
tag.SetArtist(t.Artist())
tag.SetTitle(t.Title())
tag.SetYear(t.Year())
if artwork != nil {
pic := id3v2.PictureFrame{
Encoding: id3v2.ENUTF8,
MimeType: "image/jpeg",
PictureType: id3v2.PTFrontCover,
Picture: artwork,
}
tag.AddAttachedPicture(pic)
}
return tag.Save()
}