public static SONG AddSongToDB(string name, string artistName, string albumName, List <string> genreNames, int year, int durationSec)
{
var context = DJPlaylistContext.GetContext();
var song = context.SONGS.FirstOrDefault(i => i.NAME == name && i.ARTIST_NAME == artistName && i.ALBUM_NAME == albumName && i.YEAR == year);
if (song == null)
{
song = new SONG(name, artistName, albumName, year, durationSec);
context.SONGS.Add(song);
context.SaveChanges();
}
foreach (var genreName in genreNames)
{
var genre = context.GENRES.FirstOrDefault(i => i.DESCRIPTION == genreName);
if (genre == null)
{
genre = new GENRE(genreName);
context.GENRES.Add(genre);
context.SaveChanges();
}
var songGenre = context.SONG_GENRES.FirstOrDefault(i => i.SONG_ID == song.ID && i.GENRE_ID == genre.ID);
if (songGenre == null)
{
songGenre = new SONG_GENRE(song, genre);
context.SONG_GENRES.Add(songGenre);
context.SaveChanges();
}
}
return(song);
}
private static PLAYLIST MoveSong(int userID, int playlistSongID, bool moveUp)
{
var context = DJPlaylistContext.GetContext();
var plSong = context.PLAYLIST_SONGS.FirstOrDefault(i => i.ID == playlistSongID);
if (plSong == null)
{
throw new Exception("Playlist Song not found");
}
var playList = plSong.PLAYLIST;
if (plSong.PLAYLIST.USER_ID != userID)
{
throw new Exception("Only owner can modify playlist");
}
if (moveUp)
{
playList.MoveSongUp(plSong);
}
else
{
playList.MoveSongDown(plSong);
}
context.SaveChanges();
return(playList);
}
public static PLAYLIST_SONG AddSongToPlaylist(int userID, int playlistID, int songID)
{
var context = DJPlaylistContext.GetContext();
var playlist = context.PLAYLISTS.FirstOrDefault(i => i.ID == playlistID);
if (playlist == null)
{
throw new Exception("Playlist not found");
}
var song = context.SONGS.FirstOrDefault(i => i.ID == songID);
if (song == null)
{
throw new Exception("Song not found");
}
if (playlist.USER.ID != userID)
{
throw new Exception("Only owner can add songs to playlist");
}
var order = playlist.PLAYLIST_SONGS.Any() ? playlist.PLAYLIST_SONGS.Max(i => i.ORDER) + 1 : 1;
var plSong = new PLAYLIST_SONG(playlist, song, order);
context.PLAYLIST_SONGS.Add(plSong);
context.SaveChanges();
return(plSong);
}
public static PLAYLIST_SONG PlayPlaylistSong(int id)
{
var context = DJPlaylistContext.GetContext();
var playlistSong = context.PLAYLIST_SONGS.FirstOrDefault(i => i.ID == id);
var songPlay = PlaySong(playlistSong.SONG_ID, playlistSong.PLAYLIST.USER_ID);
return(DJPlaylistContext.GetContext().PLAYLIST_SONGS.FirstOrDefault(i => i.ID == playlistSong.ID));
}
public static USER RegisterUser(string firstName, string lastName, string email)
{
var context = DJPlaylistContext.GetContext();
if (context.USERS.Any(i => i.EMAIL == email))
{
throw new Exception("There already a registered DJ associated to this email");
}
var user = new USER(firstName, lastName, email);
context.USERS.Add(user);
context.SaveChanges();
return(user);
}
public static PLAYLIST RemoveSongFromPlaylist(int playlistSongID)
{
var context = DJPlaylistContext.GetContext();
var plSong = context.PLAYLIST_SONGS.FirstOrDefault(i => i.ID == playlistSongID);
var playlist = plSong.PLAYLIST;
if (plSong == null)
{
throw new Exception("Playlist Song not found");
}
//var playList = plSong.PLAYLIST;
//if (plSong.PLAYLIST.USER_ID != userID)
// throw new Exception("Only owner can remove songs to playlist");
context.PLAYLIST_SONGS.Remove(plSong);
context.SaveChanges();
return(playlist);
}
public static PLAYLIST RenamePlaylist(int playListID, string newName)
{
var context = DJPlaylistContext.GetContext();
var playlist = context.PLAYLISTS.FirstOrDefault(i => i.ID == playListID);
if (playlist == null)
{
throw new Exception("Playlist Not Found");
}
var userID = playlist.USER_ID;
if (context.PLAYLISTS.Any(i => i.NAME == newName && i.USER_ID == userID))
{
throw new Exception("There is already a playlist with this name");
}
playlist.NAME = newName;
context.SaveChanges();
return(playlist);
}
public static SONG_PLAY PlaySong(int songID, int userId)
{
var context = DJPlaylistContext.GetContext();
var song = context.SONGS.FirstOrDefault(i => i.ID == songID);
if (song == null)
{
throw new Exception("Song not found");
}
var user = context.USERS.FirstOrDefault(i => i.ID == userId);
if (user == null)
{
throw new Exception("User not found");
}
var songPlay = new SONG_PLAY(song, user);
context.SONG_PLAYS.Add(songPlay);
context.SaveChanges();
return(songPlay);
}
public static PLAYLIST CreatePlaylist(int userID, string name, bool isPublic = false)
{
var context = DJPlaylistContext.GetContext();
var user = context.USERS.FirstOrDefault(i => i.ID == userID);
if (user == null)
{
throw new Exception("User not found");
}
if (context.PLAYLISTS.Any(i => i.NAME == name && i.USER_ID == userID))
{
throw new Exception("There is already a playlist with this name");
}
var playlist = new PLAYLIST(name, userID, isPublic);
context.PLAYLISTS.Add(playlist);
context.SaveChanges();
var userPlaylist = new USER_PLAYLIST(user, playlist);
context.USER_PLAYLISTS.Add(userPlaylist);
context.SaveChanges();
return(playlist);
}
public static List <USER> GetAllUsers()
{
return(DJPlaylistContext.GetContext().USERS.ToList());
}
public static IQueryable <PLAYLIST_SONG> GetAllPlaylistSongs()
{
return(DJPlaylistContext.GetContext().PLAYLIST_SONGS);
}
public static PLAYLIST_SONG GetPlaylistSong(int id)
{
return(DJPlaylistContext.GetContext().PLAYLIST_SONGS.FirstOrDefault(i => i.ID == id));
}
public static IQueryable <PLAYLIST> GetAllPlaylists()
{
return(DJPlaylistContext.GetContext().PLAYLISTS);
}
public static PLAYLIST GetPlaylist(int playlistId)
{
return(DJPlaylistContext.GetContext().PLAYLISTS.FirstOrDefault(i => i.ID == playlistId));
}
public static IQueryable <SONG> GetAllSongs()
{
return(DJPlaylistContext.GetContext().SONGS);
}
public static SONG GetSong(int songID)
{
return(DJPlaylistContext.GetContext().SONGS.FirstOrDefault(i => i.ID == songID));
}
