// Calculate most viewed videos
public List <ViewsPerVideoViewModel> GetMostViewedVideos()
{
var videoIds = HistoryVideos.Select(v => v.GetVideoID()).Distinct().ToList();
var timesWatched = videoIds.Select(id => HistoryVideos.Count(v => v.GetVideoID() == id)).ToList();
List <ViewsPerVideoViewModel> viewsPerVideoViewModels = new List <ViewsPerVideoViewModel>();
for (int i = 0; i < videoIds.Count; i++)
{
viewsPerVideoViewModels.Add(new ViewsPerVideoViewModel()
{
VideoViewModel = VideoViewModelsDict[videoIds[i]],
NumViews = timesWatched[i]
});
}
viewsPerVideoViewModels = viewsPerVideoViewModels.OrderByDescending(vm => vm.NumViews).ToList();
//using (StreamWriter sw = new StreamWriter(UriHelper.CALCULATIONS_OUTPUT_DIR + "/Views Per Video - " + DateTime.Now.ToFileTime() + ".csv"))
//{
// foreach (var viewModel in viewsPerVideoViewModels)
// {
// sw.WriteLine(viewModel.VideoViewModel.VideoTitle + ";" + viewModel.NumViews);
// }
//}
return(viewsPerVideoViewModels.Take(10).ToList());
}
// Get average length of video in history in miniutes
public double GetAverageLengthOfVideo()
{
var lengths = HistoryVideos.Select(v => VideoViewModelsDict[v.GetVideoID()].GetDuration());
double averageTotalSeconds = lengths.Average(l => l.TotalSeconds);
double averageMinutes = Math.Round(averageTotalSeconds / 60);
return(averageMinutes);
}
// Get average time watched per day in hours
public double GetAverageDailyWatchTime()
{
var dates = HistoryVideos.Select(v => v.GetTime().Date).Distinct().ToList();
var dailyTimesMinutes = dates.Select(d => HistoryVideos.Where(h => h.GetTime().Date.Equals(d.Date)).Sum(v => VideoViewModelsDict[v.GetVideoID()].GetDuration().TotalMinutes));
double averageTimeMinutes = dailyTimesMinutes.Average();
double averageTimeHours = Math.Round(averageTimeMinutes / 60);
return(averageTimeHours);
}
// Get month with the most time watched
public List <TimeWatchedPerMonthViewModel> GetTimeWatchedPerMonth()
{
List <MonthYearViewModel> monthViewModels = HistoryVideos.Select(v => new MonthYearViewModel(v.GetTime().Month, v.GetTime().Year)).GroupBy(vm => vm.Month + " " + vm.Year).Select(x => x.FirstOrDefault()).ToList();
List <double> monthlyHours = monthViewModels.Select(vm => HistoryVideos.Where(h => new MonthYearViewModel(h.GetTime().Month, h.GetTime().Year) == vm).Sum(v => VideoViewModelsDict[v.GetVideoID()].GetDuration().TotalHours)).ToList();
List <TimeWatchedPerMonthViewModel> viewModels = new List <TimeWatchedPerMonthViewModel>();
for (int i = 0; i < monthViewModels.Count; i++)
{
viewModels.Add(new TimeWatchedPerMonthViewModel(monthViewModels[i], Math.Round(monthlyHours[i])));
}
return(viewModels.OrderByDescending(vm => vm.HoursWatched).ToList());
}
// Calculate how many hours the user watched per day of their history
public List <HoursPerDayViewModel> GetHoursPerDay()
{
var dates = HistoryVideos.Select(v => v.GetTime().Date).Distinct().ToList();
List <TimeSpan> timeWatched = new List <TimeSpan>();
foreach (DateTime date in dates)
{
var videosOnDay = HistoryVideos.Where(h => h.GetTime().Date == date.Date).ToList();
TimeSpan timeForDay = new TimeSpan(0, 0, 0);
foreach (HistoryVideo video in videosOnDay)
{
VideoViewModel viewModel = VideoViewModelsDict[video.GetVideoID()];
timeForDay = timeForDay.Add(viewModel.GetDuration());
}
timeWatched.Add(timeForDay);
}
List <HoursPerDayViewModel> hoursPerDayViewModels = new List <HoursPerDayViewModel>();
for (int i = 0; i < timeWatched.Count; i++)
{
hoursPerDayViewModels.Add(new HoursPerDayViewModel()
{
Date = dates[i],
HoursWatched = timeWatched[i]
});
}
//using (StreamWriter sw = new StreamWriter(UriHelper.CALCULATIONS_OUTPUT_DIR + "/Hours Per Day - " + DateTime.Now.ToFileTime() + ".csv"))
//{
// foreach (var viewModel in hoursPerDayViewModels)
// {
// sw.WriteLine(viewModel.Date.ToShortDateString() + ";" + viewModel.HoursWatched.Hours + " Hours, " + viewModel.HoursWatched.Minutes + " Minutes and " + viewModel.HoursWatched.Seconds + " Seconds");
// }
//}
return(hoursPerDayViewModels);
}
// Get total number of channels watched
public int GetTotalUniqueChannelsWatched()
{
return(HistoryVideos.Select(v => VideoViewModelsDict[v.GetVideoID()].ChannelId).Distinct().Count());
}
// Get total number of unqiue videos watched
public int GetTotalUniqueVideosWatched()
{
return(HistoryVideos.Select(hv => hv.GetVideoID()).Distinct().Count());
}
