/// <summary>
/// Called when a group of songs from the same folder have been scanned
/// Group the songs into albums by album name and then process each of these albums
/// </summary>
/// <param name="songs"></param>
public async Task SongsScanned(List <ScannedSong> songs)
{
Dictionary <string, ScannedAlbum> albumGroups = new();
// Group the list of songs according to the associated album, and determine if all the songs are by the same artist
foreach (ScannedSong song in songs)
{
// Replace empty tags etc.
song.NormaliseTags();
// Is there a group for this album
if (albumGroups.TryGetValue(song.Tags.Album, out ScannedAlbum album) == false)
{
album = new ScannedAlbum()
{
Name = song.Tags.Album
};
albumGroups[album.Name] = album;
}
if (await DoesSongRequireAdding(song) == true)
{
// Add the song to the album
album.Songs.Add(song);
}
// If this is not the first song in the group then check if the artist is the same
if (album.Songs.Count > 1)
{
if ((album.SingleArtist == true) && (album.Songs[0].ArtistName.ToUpper() != song.ArtistName.ToUpper()))
{
album.SingleArtist = false;
}
}
}
// Store the scanned song data
foreach (ScannedAlbum album in albumGroups.Values)
{
if (album.Songs.Count > 0)
{
await StoreAlbumAsync(album);
}
}
}
/// <summary>
/// Either find an existing album or create a new album to hold the songs.
/// If all songs are from the same artist then check is there is an existing album of the same name associated with that artist.
/// If the songs are from different artists then check in the "Various Artists" artist.
/// These artists may not exist at this stage
/// </summary>
/// <returns></returns>
private async Task <Album> GetAlbumToHoldSongsAsync(ScannedAlbum album)
{
Album songAlbum = null;
string artistName = (album.SingleArtist == true) ? album.Songs[0].ArtistName : VariousArtistsString;
// Check if the artist already exists in the library.
Artist songArtist = artistsInLibrary.GetValueOrDefault(artistName.ToUpper());
// If the artist exists then check for existing album. The artist will hold ArtistAlbum entries rather than Album entries, but the ArtistAlbum entries
// have the same name as the albums. Cannot just use the album name as that may not be unique.
if (songArtist != null)
{
ArtistAlbum songArtistAlbum = songArtist.ArtistAlbums.SingleOrDefault(p => (p.Name.ToUpper() == album.Songs[0].Tags.Album.ToUpper()));
if (songArtistAlbum != null)
{
songAlbum = songArtistAlbum.Album;
// The rest of the code expects the Album to have its songs populated, so check here
songAlbum.GetSongs();
}
}
Logger.Log(string.Format("Album: {0} {1} for artist {2}", album.Name, (songAlbum != null) ? "found" : "not found", artistName));
// If no existing album create a new one
if (songAlbum == null)
{
songAlbum = new Album()
{
Name = album.Name, Songs = new List <Song>(), LibraryId = scanLibrary
};
await Albums.AddAlbumAsync(songAlbum);
}
return(songAlbum);
}
/// <summary>
/// Called to process a group of songs belonging to the same album name ( but not necessarily the same artist )
/// </summary>
/// <param name="album"></param>
private async Task StoreAlbumAsync(ScannedAlbum album)
{
// Set the modified flag
LibraryModified = true;
Logger.Log(string.Format("Album: {0} Single artist: {1}", album.Name, album.SingleArtist));
// Get an existing or new Album entry for the songs
Album songAlbum = await GetAlbumToHoldSongsAsync(album);
// Keep track of Artist and ArtistAlbum entries in case they can be reused for different artists
ArtistAlbum songArtistAlbum = null;
Artist songArtist = null;
// Add all the songs in the album
foreach (ScannedSong songScanned in album.Songs)
{
// If there is no existing Artist entry or the current one if for the wrong Artist name then get or create a new one
if ((songArtist == null) || (songArtist.Name != songScanned.ArtistName))
{
// As this is a new Artist the ArtistAlbum needs to be re-initialised.
if (songArtistAlbum != null)
{
songArtistAlbum.Songs.Sort((a, b) => a.Track.CompareTo(b.Track));
}
songArtistAlbum = null;
// Find the Artist for this song
songArtist = await GetArtistToHoldSongsAsync(songScanned.ArtistName);
}
// If there is an existing ArtistAlbum then use it as it will be for the correct Artist, i.e. not cleared above
if (songArtistAlbum == null)
{
// Find an existing or create a new ArtistAlbum entry
songArtistAlbum = await GetArtistAlbumToHoldSongsAsync(songArtist, songAlbum);
}
// Add the song to the database, the album and the album artist
Song songToAdd = new() {
Title = songScanned.Tags.Title, Track = songScanned.Track, Path = songScanned.SourcePath,
ModifiedTime = songScanned.Modified, Length = songScanned.Length, AlbumId = songAlbum.Id, ArtistAlbumId = songArtistAlbum.Id,
SourceId = sourceBeingScanned.Id
};
// No need to wait for this
Songs.AddSongAsync(songToAdd);
Logger.Log(string.Format("Artist: {0} Title: {1} Track: {2} Modified: {3} Length {4} Year {5}", songScanned.Tags.Artist, songScanned.Tags.Title,
songScanned.Tags.Track, songScanned.Modified, songScanned.Length, songScanned.Year));
// Add to the Album
songAlbum.Songs.Add(songToAdd);
// Keep track whether or not to update the album
bool updateAlbum = false;
// Store the artist name with the album
if ((songAlbum.ArtistName == null) || (songAlbum.ArtistName.Length == 0))
{
songAlbum.ArtistName = songArtist.Name;
updateAlbum = true;
}
else
{
// The artist has already been stored - check if it is the same artist
if (songAlbum.ArtistName != songArtist.Name)
{
songAlbum.ArtistName = VariousArtistsString;
updateAlbum = true;
}
}
// Update the album year if not already set and this song has a year set
if ((songAlbum.Year != songScanned.Year) && (songAlbum.Year == 0))
{
songAlbum.Year = songScanned.Year;
updateAlbum = true;
}
// Update the album genre.
// Only try updating if a genre is defined for the song
// If the album does not have a genre then get one for the song and store it in the album
if ((songScanned.Tags.Genre.Length > 0) && (songAlbum.Genre.Length == 0))
{
songAlbum.Genre = songScanned.Tags.Genre;
updateAlbum = true;
}
if (updateAlbum == true)
{
await ConnectionDetailsModel.AsynchConnection.UpdateAsync(songAlbum);
}
// Add to the source
sourceBeingScanned.Songs.Add(songToAdd);
// Add to the ArtistAlbum
songArtistAlbum.Songs.Add(songToAdd);
}
if (songArtistAlbum != null)
{
songArtistAlbum.Songs.Sort((a, b) => a.Track.CompareTo(b.Track));
}
}
