public async Task <IReadOnlyCollection <AdvisedPlaylist> > Advise(IEnumerable <DiscModel> discs, int requiredAdvisesCount, CancellationToken cancellationToken)
{
Memo ??= await sessionDataService.GetData <PlaylistAdviserMemo>(PlaylistAdviserDataKey, cancellationToken) ?? CreateDefaultMemo();
var playbacksMemo = Memo;
var adviseGroups = (await discGrouper.GroupLibraryDiscs(discs, cancellationToken)).ToList();
var playbacksInfo = new PlaybacksInfo(adviseGroups);
var highlyRatedSongsAdvises = await highlyRatedSongsAdviser.Advise(adviseGroups, playbacksInfo, cancellationToken);
var favoriteAdviseGroupAdvises = await favoriteAdviseGroupsAdviser.Advise(adviseGroups, playbacksInfo, cancellationToken);
var rankedAdvises = await rankBasedAdviser.Advise(adviseGroups, playbacksInfo, cancellationToken);
var playlistQueue = new CompositeAdvisedPlaylistQueue(highlyRatedSongsAdvises, favoriteAdviseGroupAdvises, rankedAdvises);
var advisedPlaylists = new List <AdvisedPlaylist>(requiredAdvisesCount);
var knownAdviseSets = new HashSet <string>();
while (advisedPlaylists.Count < requiredAdvisesCount)
{
var currentAdvise = GetNextAdvisedPlaylist(playbacksMemo, playlistQueue);
if (currentAdvise == null)
{
break;
}
var adviseSet = currentAdvise.AdviseSet;
if (adviseSet != null)
{
if (knownAdviseSets.Contains(adviseSet.Id))
{
continue;
}
knownAdviseSets.Add(adviseSet.Id);
}
advisedPlaylists.Add(currentAdvise);
playbacksMemo = playbacksMemo.RegisterPlayback(currentAdvise);
}
return(advisedPlaylists);
}
private AdvisedPlaylist GetNextAdvisedPlaylist(PlaylistAdviserMemo playbacksMemo, CompositeAdvisedPlaylistQueue playlistQueue)
{
if (playbacksMemo.PlaybacksSinceHighlyRatedSongsPlaylist + 1 >= settings.HighlyRatedSongsAdviser.PlaybacksBetweenHighlyRatedSongs &&
playlistQueue.TryDequeueHighlyRatedSongsAdvise(out var currentAdvise))
{
return(currentAdvise);
}
if (playbacksMemo.PlaybacksSinceFavoriteAdviseGroup + 1 >= settings.PlaybacksBetweenFavoriteAdviseGroups &&
playlistQueue.TryDequeueFavoriteAdviseGroupAdvise(out currentAdvise))
{
return(currentAdvise);
}
return(playlistQueue.TryDequeueRankedAdvise(out currentAdvise) ? currentAdvise : null);
}
