public double CalculateAdviseGroupRank(AdviseGroupContent adviseGroup, PlaybacksInfo playbacksInfo)
{
var playbacksPassed = playbacksInfo.GetPlaybacksPassed(adviseGroup);
return(playbacksPassed == Int32.MaxValue ? MaxRank :
GetFactorForAdviseGroupSize(adviseGroup.AdviseSets.Count(x => !x.IsDeleted)) *
GetFactorForAverageRating(GetRating(adviseGroup)) *
GetFactorForPlaybackAge(playbacksPassed));
}
public double CalculateAdviseSetRank(AdviseSetContent adviseSet, PlaybacksInfo playbacksInfo)
{
if (adviseSet.LastPlaybackTime == null)
{
return(MaxRank);
}
var playbacksPassed = playbacksInfo.GetPlaybacksPassed(adviseSet);
return(GetFactorForAverageRating(GetRating(adviseSet)) * GetFactorForPlaybackAge(playbacksPassed));
}
public double CalculateSongRank(SongModel song, PlaybacksInfo playbacksInfo)
{
if (!song.LastPlaybackTime.HasValue)
{
return(MaxRank);
}
var factorForRating = GetFactorForRating(song.GetRatingOrDefault());
var factorForPlaybacksAge = GetFactorForPlaybackAge(playbacksInfo.GetPlaybacksPassed(song));
return(factorForRating * factorForPlaybacksAge);
}
public IEnumerable <AdviseSetContent> SortAdviseSets(IEnumerable <AdviseSetContent> adviseSets, PlaybacksInfo playbacksInfo)
{
return(adviseSets
.OrderByDescending(x => adviseRankCalculator.CalculateAdviseSetRank(x, playbacksInfo)));
}