/// <summary>
/// This creates a new empty playlist with the given name.
/// </summary>
/// <param name="name"></param>
/// <returns></returns>
public IPlaylist CreatePlaylist(string name)
{
if (name == null)
{
throw new ArgumentNullException();
}
var dbList = new BmpPlaylist()
{
Songs = new List <BmpSong>(),
Name = name,
Id = null
};
return(new BmpPlaylistDecorator(dbList));
}
/// <summary>
/// This creates a playlist containing songs that match the given tag.
/// </summary>
/// <param name="tag"></param>
/// <returns></returns>
public IPlaylist CreatePlaylistFromTag(string tag)
{
if (tag == null)
{
throw new ArgumentNullException();
}
var songCol = this.GetSongCollection();
// TODO: This is brute force and not memory efficient; there has to be a better
// way to do this, but my knowledge of LINQ and BsonExpressions isn't there yet.
var allSongs = songCol.FindAll();
var songList = new List <BmpSong>();
foreach (var entry in allSongs)
{
if (TagMatches(tag, entry))
{
songList.Add(entry);
}
}
if (songList.Count == 0)
{
return(null);
}
var dbList = new BmpPlaylist()
{
Name = tag,
Songs = songList,
Id = null
};
return(new BmpPlaylistDecorator(dbList));
}
/// <summary> /// Constructor. /// </summary> /// <param name="target"></param> internal BmpPlaylistDecorator(BmpPlaylist target) => this.target = target ?? throw new NullReferenceException();
