public static List <PlaylistSong> GeneratePlayList(string playListName, int minutes)
{
List <PlaylistSong> playlistSongList = new List <PlaylistSong>();
List <Song> workingList = CDCatalogManager.GetSongs(); //TODO: Filter songs based on Genre and/or Rating.
int seconds = (minutes * 60); //Song lengths are stored in seconds, but the user selects a playlist duration in minutes.
Playlist playlist = new Playlist();
playlist.PlaylistName = playListName; //TODO: Consider checking for and preventing duplicate names.
CDCatalogManager.AddPlaylist(playlist);
playlistSongList = CombinationsPlaylist(workingList, playlist, seconds); //Works speedily now.
//playlistSongList = RandomPlayList(workingList, seconds, playlist); //My prior algorithm, which did not guarantee a return.
return(playlistSongList);
}
public static int CreatePlaylistGo(string playListName, int minutes)
{
//Generate a random Playlist of the length specified.
subWindowPlaylistSongs.Clear();
Song songObject = new Song();
int totalDuration = 0;
if (minutes > 0)
{
List <PlaylistSong> playlistSongList = GeneratePlayList(playListName, minutes).OrderBy(pls => pls.SongOrder).ToList();
for (int i = 0; i < playlistSongList.Count; i++)
{
PlaylistSong pls = playlistSongList[i];
songObject = CDCatalogManager.GetSongs().Where(s => s.SongID.Equals(pls.SongID)).First();
subWindowPlaylistSongs.Add(songObject);
totalDuration += songObject.TrackLength;
}
}
return(totalDuration);
}
public static void GetAllSongs()
{
displaySongList = CDCatalogManager.GetSongs();
}
public static bool AddSongGo(string title, Artist artist, Album album, string trackIn, Genre genre,
string minutes, string seconds, int rating, out string message)
{
//Validate the input fields from the AddSong window, then add the Song to the model.
bool isValid = true;
message = "";
int tracknum = 0;
int trackminutes = 0;
int trackseconds = 0;
int doesSongExist = CDCatalogManager.GetSongs().Where(s => s.SongTitle.Equals(title)).Where(
s => s.AlbumID.Equals(album.AlbumID)).Where(
s => s.ArtistID.Equals(artist.ArtistID)).Count();
if (doesSongExist != 0)
{
isValid = false;
message += "A Song by this Artist on this Album already exists in the database.";
}
if (title == "")
{
isValid = false;
message += "Song Title cannot be blank.\n";
}
if (null == artist)
{
isValid = false;
message += "Please select an Artist.\n";
}
if (null == album)
{
isValid = false;
message += "Please select an Album.\n";
}
if (!int.TryParse(trackIn, out tracknum) || tracknum < 0)
{
isValid = false;
message += "Track # must be a nonnegative integer.\n";
}
if (null == genre)
{
isValid = false;
message += "Please select a Genre.\n";
}
if (minutes != "")
{
if (!int.TryParse(minutes, out trackminutes) || trackminutes < 0)
{
isValid = false;
message += "Track minutes must be a nonnegative integer or blank.\n";
}
}
if (!int.TryParse(seconds, out trackseconds) || trackseconds < 1)
{
isValid = false;
message += "Track seconds must be a positive integer.\n";
}
if (isValid)
{
Song song = new Song();
song.SongTitle = title;
song.ArtistID = artist.ArtistID;
song.AlbumID = album.AlbumID;
song.TrackNumber = tracknum;
song.GenreID = genre.GenreID;
song.TrackLength = ((trackminutes * 60) + trackseconds);
song.Rating = rating;
CDCatalogManager.AddSong(song);
}
return(isValid);
}
