public static Song GetOrCreateSong(Song song, MusicStoreDb musicStoreDbContext)
{
Song existingSong = null;
song.Artist = GetOrCreateArtist(song.Artist, musicStoreDbContext);
if (song.Id != 0)
{
existingSong = musicStoreDbContext.Songs.FirstOrDefault(s => s.Id == song.Id);
}
else if (song.Title != null)
{
existingSong = musicStoreDbContext.Songs.FirstOrDefault(s => s.Title == song.Title);
}
if (existingSong != null)
{
return existingSong;
}
musicStoreDbContext.Songs.Add(song);
musicStoreDbContext.SaveChanges();
return song;
}
public static Artist GetOrCreateArtist(Artist artist, MusicStoreDb musicStoreDbContext)
{
Artist existingArtist = null;
if (artist.Id != 0)
{
existingArtist = musicStoreDbContext.Artists.FirstOrDefault(a => a.Id == artist.Id);
}
else if (artist.Name != null)
{
existingArtist = musicStoreDbContext.Artists.FirstOrDefault(a => a.Name == artist.Name);
}
if (existingArtist != null)
{
return existingArtist;
}
musicStoreDbContext.Artists.Add(artist);
musicStoreDbContext.SaveChanges();
return artist;
}
public static Album GetOrCreateAlbum(Album album, MusicStoreDb musicStoreDbContext)
{
Album existingAlbum = null;
if (album.Id != 0)
{
existingAlbum = musicStoreDbContext.Albums.FirstOrDefault(a => a.Id == album.Id);
}
else if (album.Title != null)
{
existingAlbum = musicStoreDbContext.Albums.FirstOrDefault(a => a.Title == album.Title);
}
if (existingAlbum != null)
{
return existingAlbum;
}
musicStoreDbContext.Albums.Add(album);
musicStoreDbContext.SaveChanges();
return album;
}