public async Task WeeklyReview(DateTime now)
{
FeedManager feedManager = new FeedManager();
List <Subject> subjects = await repo.ReadSubjectsAsync();
foreach (Subject subject in subjects)
{
int days = 6;
int fcToday = 0;
int fcHistory = 0;
float avarage = 0;
double std = 0;
double zScore = 0;
List <Feed> feeds;
DateTime end = now;
DateTime start = end.AddDays(-7);
List <double> values = new List <double>();
if (subject.GetType().Equals(typeof(Person)))
{
feeds = await feedManager.GetPersonFeedsSinceAsync(subject.Name, now.AddDays(-7));
subject.FeedCount = feeds.Count();
}
else if (subject.GetType().Equals(typeof(Organisation)))
{
feeds = await feedManager.GetOrganisationFeedsSinceAsync(subject.Name, now.AddDays(-7));
subject.FeedCount = feeds.Count();
}
else
{
feeds = await feedManager.GetWordFeedsSinceAsync(subject.Name, now.AddDays(-7));
subject.FeedCount = feeds.Count();
}
foreach (Feed f in feeds)
{
if (f.Date.Ticks >= end.AddDays(-1).Ticks)
{
fcToday++;
}
}
for (int i = 6; i > 0; i--)
{
foreach (Feed f in feeds)
{
if (start.AddDays(6 - i).Ticks <= f.Date.Ticks && f.Date.Ticks < end.AddDays(-i).Ticks)
{
fcHistory++;
}
}
avarage += fcHistory;
values.Add(fcHistory);
fcHistory = 0;
}
avarage = (float)avarage / days;
foreach (float item in values)
{
std += Math.Pow(item - avarage, 2);
}
std = Math.Sqrt(std / days);
zScore = ((float)fcToday - avarage) / std;
if (zScore > 2)
{
subject.Trending = true;
}
else
{
subject.Trending = false;
}
}
await repo.UpdateSubjects(subjects);
}