// RenamePlaylist moves the entire Playlist and changes all
// the links to the songs in every MuLi song.
func RenamePlaylist(oldName, newName, mPoint string) (string, error) {
glog.Infof("Renaming %s playlist to %s.\n", oldName, newName)
newName = GetCompatibleString(newName)
db, err := bolt.Open(config.DbPath, 0600, nil)
if err != nil {
return "", err
}
defer db.Close()
err = db.Update(func(tx *bolt.Tx) error {
root := tx.Bucket([]byte("Playlists"))
if root == nil {
glog.Errorf("Error opening Playlists bucket.\n")
return errors.New("Error opening Playlists bucket.")
}
playlistBucket := root.Bucket([]byte(oldName))
if playlistBucket == nil {
return nil
}
newPlaylistBucket, err := root.CreateBucketIfNotExists([]byte(newName))
if err != nil {
glog.Infof("Cannot create new playlist bucket: %s\n", err)
return err
}
c := playlistBucket.Cursor()
for k, songJson := c.First(); k != nil; k, songJson = c.Next() {
if songJson == nil {
glog.Infof("Error opening song Json: %s in playlist: %s\n", k, oldName)
continue
}
// Get the PlaylistFile
var file playlistmgr.PlaylistFile
err = json.Unmarshal(songJson, &file)
if err != nil {
continue
}
// Open the song in the MuLi database
// to remove the playlists connection.
artistsBucket := tx.Bucket([]byte("Artists"))
if artistsBucket == nil {
glog.Error("Cannot open Artists bucket.")
return errors.New("Cannot open Artists bucket.")
}
artistBucket := artistsBucket.Bucket([]byte(file.Artist))
if artistBucket == nil {
glog.Infof("Cannot open Artist bucket: %s.\n", file.Artist)
continue
}
albumBucket := artistBucket.Bucket([]byte(file.Album))
if albumBucket == nil {
glog.Infof("Cannot open Album bucket: %s in Artist: %s.\n", file.Album, file.Artist)
continue
}
jsonFile := albumBucket.Get([]byte(file.Title))
if jsonFile == nil {
glog.Infof("Cannot open song: %s Album bucket: %s in Artist: %s.\n", file.Title, file.Album, file.Artist)
continue
}
var song SongStore
err = json.Unmarshal(jsonFile, &song)
if err != nil {
return err
}
// Remove the playlist from the song's playlists list
if song.Playlists != nil {
for i, list := range song.Playlists {
if list == oldName {
song.Playlists[i] = newName
break
}
}
}
encoded, err := json.Marshal(song)
if err != nil {
return err
}
// Store the modified song version
err = albumBucket.Put([]byte(k), encoded)
if err != nil {
continue
}
err = newPlaylistBucket.Put(k, songJson)
if err != nil {
continue
}
}
playlistmgr.DeletePlaylist(oldName, mPoint)
return root.DeleteBucket([]byte(oldName))
})
if err != nil {
return "", err
}
return newName, nil
}
// DeletePlaylist function deletes a playlist from the database
// and also deletes all the entries in the specific files and
// deletes it from the filesystem.
func DeletePlaylist(name, mPoint string) error {
db, err := bolt.Open(config.DbPath, 0600, nil)
if err != nil {
return err
}
defer db.Close()
err = db.Update(func(tx *bolt.Tx) error {
root := tx.Bucket([]byte("Playlists"))
if root == nil {
glog.Errorf("Error opening Playlists bucket.\n")
return errors.New("Error opening Playlists bucket.")
}
playlistBucket := root.Bucket([]byte(name))
if playlistBucket == nil {
return nil
}
c := playlistBucket.Cursor()
for k, songJson := c.First(); k != nil; k, songJson = c.Next() {
if songJson == nil {
glog.Infof("Error opening song Json: %s in playlist: %s\n", k, name)
continue
}
// Get the PlaylistFile
var file playlistmgr.PlaylistFile
err = json.Unmarshal(songJson, &file)
if err != nil {
continue
}
// Open the song in the MuLi database
// to remove the playlists connection.
artistsBucket := tx.Bucket([]byte("Artists"))
if artistsBucket == nil {
glog.Error("Cannot open Artists bucket.")
return errors.New("Cannot open Artists bucket.")
}
artistBucket := artistsBucket.Bucket([]byte(file.Artist))
if artistBucket == nil {
glog.Infof("Cannot open Artist bucket: %s.\n", file.Artist)
continue
}
albumBucket := artistBucket.Bucket([]byte(file.Album))
if albumBucket == nil {
glog.Infof("Cannot open Album bucket: %s in Artist: %s.\n", file.Album, file.Artist)
continue
}
jsonFile := albumBucket.Get([]byte(file.Title))
if jsonFile == nil {
glog.Infof("Cannot open song: %s Album bucket: %s in Artist: %s.\n", file.Title, file.Album, file.Artist)
continue
}
var song SongStore
err = json.Unmarshal(jsonFile, &song)
if err != nil {
return err
}
// Remove the playlist from the song's playlists list
if song.Playlists != nil {
for i, list := range song.Playlists {
if list == name {
song.Playlists = append(song.Playlists[:i], song.Playlists[i+1:]...)
break
}
}
}
encoded, err := json.Marshal(song)
if err != nil {
return err
}
// Store the modified song version
return albumBucket.Put([]byte(k), encoded)
}
return root.DeleteBucket([]byte(name))
})
return playlistmgr.DeletePlaylist(name, mPoint)
}