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);
}
public async Task <IReadOnlyCollection <AdvisedPlaylist> > Advise(IEnumerable <AdviseGroupContent> adviseGroups, PlaybacksInfo playbacksInfo, CancellationToken cancellationToken)
{
var adviseGroupsList = adviseGroups.ToList();
var adviseSetToAdviseGroupMap = adviseGroupsList
.SelectMany(adviseGroup => adviseGroup.AdviseSets.Select(adviseSet => (adviseGroup, adviseSet)))
.ToDictionary(x => x.adviseSet.Id, x => x.adviseGroup);
var advisedPlaylists = await rankBasedAdviser.Advise(adviseGroupsList, playbacksInfo, cancellationToken);
return(advisedPlaylists.Select(x => x.AdviseSet)
.GroupBy(x => adviseSetToAdviseGroupMap[x.Id], new AdviseGroupContentEqualityComparer())
.Where(g => g.Key.IsFavorite)
.OrderByDescending(g => playbacksInfo.GetPlaybacksPassed(g.Key))
.Select(g => g.First())
.Select(AdvisedPlaylist.ForAdviseSetFromFavoriteAdviseGroup)
.ToList());
}
