public static void AddItemToGroup <T>(RealObservableCollection <GroupInfoList <T> > group, T addition, Func <T, char> keyConversion)
{
GroupInfoList <T> list = GetItemGroup(group, addition, keyConversion);
if (list.FirstOrDefault((a) => ((dynamic)a).ID == ((dynamic)addition).ID) == null)
{
list.Add(addition);
}
}
public static GroupInfoList <T> GetItemGroup <T>(RealObservableCollection <GroupInfoList <T> > group, string key)
{
GroupInfoList <T> list = group.FirstOrDefault((g) => g.Key.ToString() == key);
if (list == null)
{
key = "\uD83C\uDF10";
list = group.First((g) => g.Key.ToString() == key);
}
return(list);
}
public static GroupInfoList <T> GetItemGroup <T>(RealObservableCollection <GroupInfoList <T> > group, T addition, Func <T, char> keyConversion)
{
string key = (keyConversion(addition).ToString().ToLower());
if (Char.IsDigit(key[0]) || Char.IsSymbol(key[0]))
{
key = "#";
}
else if (!Char.IsLetter(key[0]))
{
key = "\uD83C\uDF10";
}
return(GetItemGroup <T>(group, key));
}
public DeletionResult DeleteSong(Song song, RealObservableCollection <GroupInfoList <Artist> > artistsList,
RealObservableCollection <GroupInfoList <Album> > albumsList,
RealObservableCollection <GroupInfoList <Song> > songsList)
{
GroupInfoList <Song> songList = MusicLibrary.GetItemGroup(songsList, song, a => a.SongTitle[0]);
List <Song> songs;
if (Songs.TryGetValue(song.Artist.ToLower() + "--" + song.Album.ToLower(), out songs))
{
songList.Remove(song);
songs.Remove(song);
}
songs = GetSongs(song.Artist, song.Album);
if (songs.Count == 0)
{
Songs.Remove(song.Artist.ToLower() + "--" + song.Album.ToLower());
List <Album> albums;
if (Albums.TryGetValue(song.Artist.ToLower(), out albums))
{
Album album = albums.FirstOrDefault((a) => a.AlbumName == song.Album);
albums.Remove(album);
if (albums.Count == 0)
{
GroupInfoList <Album> albumList = MusicLibrary.GetItemGroup(albumsList, album, aa => aa.AlbumName[0]);
Albums.Remove(song.Artist.ToLower());
albumList.Remove(album);
Artist artist = Artists[song.Artist.ToLower()];
GroupInfoList <Artist> artistList = MusicLibrary.GetItemGroup(artistsList, artist, a => a.ArtistName[0]);
Artists.Remove(song.Artist.ToLower());
artistList.Remove(artist);
return(DeletionResult.Artist);
}
return(DeletionResult.Album);
}
}
return(DeletionResult.Song);
}
private MusicLibrary()
{
ArtistGroupDictionary = CreateObservableGroupDictionary <Artist>();
ArtistsCollection = new CollectionViewSource()
{
IsSourceGrouped = true, Source = ArtistGroupDictionary
};
AlbumGroupDictionary = CreateObservableGroupDictionary <Album>();
AlbumsCollection = new CollectionViewSource()
{
IsSourceGrouped = true, Source = AlbumGroupDictionary
};
SongGroupDictionary = CreateObservableGroupDictionary <Song>();
SongsCollection = new CollectionViewSource()
{
IsSourceGrouped = true, Source = SongGroupDictionary
};
_cache = new MusicLibraryCache();
}
