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Update StatisticsTask.cs #1

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66 changes: 17 additions & 49 deletions 6.LINQ/StatisticsTask.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,3 @@
// Вставьте сюда финальное содержимое файла StatisticsTask.cs
using System;
using System.Collections.Generic;
using System.Linq;
Expand All @@ -7,52 +6,21 @@ namespace linq_slideviews
{
public class StatisticsTask
{
private static double savedValue = 0;
private static bool sameSlide = false;

public static double GetMedianTimePerSlide(List<VisitRecord> visits, SlideType slideType)
{
return visits
.GroupBy(visit => visit.UserId)
.Select(group => group.OrderBy(x => x.DateTime)
.Bigrams())
.Select(bigram => GetAllTimes(bigram, slideType))
.SelectMany(x => x)
.Where(time=> time >= 1 && time <= 120)
.ToList()
.DefaultIfEmpty(0)
.Median();
}

private static IEnumerable<double> GetAllTimes(IEnumerable<Tuple<VisitRecord, VisitRecord>> visits, SlideType slideType)
{
return visits
.Where(visit => visit.Item1.UserId.Equals(visit.Item2.UserId))
.Where(x => CheckForSlideId(x) && x.Item1.SlideType == slideType)
.Select(visit => visit.Item2.DateTime.Subtract(visit.Item1.DateTime).TotalMinutes + savedValue);
}

private static double GetTime(Tuple<VisitRecord, VisitRecord> visits)
{
if (!visits.Item1.UserId.Equals(visits.Item2.UserId)) return 0;
return visits.Item2.DateTime.Subtract(visits.Item1.DateTime).TotalMinutes;
}

private static bool CheckForSlideId(Tuple<VisitRecord, VisitRecord> visit)
{
if (visit.Item1.SlideId.Equals(visit.Item2.SlideId))
{
sameSlide = true;
savedValue += visit.Item2.DateTime.Subtract(visit.Item1.DateTime).TotalMinutes;
return false;
}
else if (sameSlide)
{
sameSlide = false;
return true;
}
savedValue = 0;
return true;
}
public static double GetMedianTimePerSlide(List<VisitRecord> visits, SlideType slideType){
return visits
.ToLookup(x => x.UserId, x => x)
.Select(x => x
.OrderBy(y => y.DateTime)
.Bigrams()
.Where(y =>
y.Item1.SlideType == slideType
&& y.Item1.SlideId != y.Item2.SlideId)
.Select(y => y.Item2.DateTime.Subtract(y.Item1.DateTime).TotalMinutes)
.Where(y => y >= 1 && y <= 120)
)
.SelectMany(x => x)
.DefaultIfEmpty(0)
.Median();
}
}
}
}