protected virtual async IAsyncEnumerable <AlbumInfo> LoadAllAlbumsAsync()
{
var setFolders = _db.MediaFolders;
var dbAlbums = await setFolders
.AsNoTracking()
.OfType <MediaAlbum>()
.Select(x => new { x.Id, x.Name })
.ToDictionaryAsync(x => x.Name);
foreach (var lazyProvider in _albumProviders)
{
var provider = lazyProvider.Value;
var albums = provider.GetAlbums().DistinctBy(x => x.Name).ToArray();
foreach (var album in albums)
{
var info = new AlbumInfo
{
Name = album.Name,
ProviderType = provider.GetType(),
IsSystemAlbum = typeof(SystemAlbumProvider) == provider.GetType(),
DisplayHint = provider.GetDisplayHint(album) ?? new AlbumDisplayHint()
};
if (provider is IMediaTrackDetector detector)
{
var propertyTable = new TrackedMediaPropertyTable(album.Name);
detector.ConfigureTracks(album.Name, propertyTable);
info.IsTrackDetector = true;
info.TrackedProperties = propertyTable.GetProperties();
}
if (dbAlbums.TryGetValue(album.Name, out var dbAlbum))
{
info.Id = dbAlbum.Id;
}
else
{
setFolders.Add(album);
await _db.SaveChangesAsync();
info.Id = album.Id;
}
yield return(info);
}
}
}
protected virtual IEnumerable <AlbumInfo> LoadAllAlbums()
{
var dbAlbums = _db.MediaAlbums
.AsNoTracking()
.Select(x => new { x.Id, x.Name })
.ToDictionary(x => x.Name);
var trackDetectors = _trackDetectors.Select(x => x.Value).ToArray();
foreach (var lazyProvider in _albumProviders)
{
var provider = lazyProvider.Value;
var albums = provider.GetAlbums().DistinctBy(x => x.Name).ToArray();
foreach (var album in albums)
{
var albumTrackDetectors = trackDetectors.Where(x => x.MatchAlbum(album.Name));
var albumInfo = new AlbumInfo
{
Name = album.Name,
ProviderType = provider.GetType(),
IsSystemAlbum = typeof(SystemAlbumProvider) == provider.GetType(),
DisplayHint = provider.GetDisplayHint(album) ?? new AlbumDisplayHint(),
TrackDetectorTypes = albumTrackDetectors.Select(x => x.GetType()).ToArray()
};
if (albumInfo.HasTrackDetector)
{
var propertyTable = new TrackedMediaPropertyTable(album.Name);
albumTrackDetectors.Each(detector => detector.ConfigureTracks(album.Name, propertyTable));
albumInfo.TrackedProperties = propertyTable.GetProperties();
}
if (dbAlbums.TryGetValue(album.Name, out var dbAlbum))
{
albumInfo.Id = dbAlbum.Id;
}
else
{
_db.MediaAlbums.Add(album);
_db.SaveChanges();
albumInfo.Id = album.Id;
}
yield return(albumInfo);
}
}
}
