public IEnumerable <TimeStatisticItem> GetStatisticsPerDay(IEnumerable <PreGeneratedStatistic> preGeneratedStatistics, IEnumerable <Message> latestMessages, TimeRange expectedTimeRange)
{
latestMessages = this.FilterMessages(latestMessages, preGeneratedStatistics);
var oldestLastMessagesDate = latestMessages.OrderBy(x => x.SentAt).FirstOrDefault()?.SentAt ?? DateTime.Today;
var result = new List <TimeStatisticItem>();
expectedTimeRange.ForeachDay((i, day) =>
{
var sum = 0;
if (day >= oldestLastMessagesDate.Date)
{
sum += latestMessages.Where(x => x.SentAt.Date == day).Count();
}
sum += preGeneratedStatistics.Where(x => x.Period == Period.Day && x.TimeRange.Start == day).OrderBy(x => x.CreatedAt).FirstOrDefault()?.Count ?? 0;
var item = new TimeStatisticItem(TimeRange.Create(day, day.AddDays(1).AddSeconds(-1)), sum);
result.Add(item);
});
return(result);
}