public static async Task <List <EventModel> > GetEventsByTimeAsync(List <DateTime> startDateList, List <DateTime> startTimeList, List <DateTime> endDateList, List <DateTime> endTimeList, TimeZoneInfo userTimeZone, ICalendarService calendarService)
{
// todo: check input datetime is utc
var rawEvents = new List <EventModel>();
var resultEvents = new List <EventModel>();
if (!startDateList.Any() && !startTimeList.Any() && !endDateList.Any() && !endTimeList.Any())
{
return(resultEvents);
}
DateTime?startDate = null;
if (startDateList.Any())
{
startDate = startDateList.Last();
}
DateTime?endDate = null;
if (endDateList.Any())
{
endDate = endDateList.Last();
}
var searchByStartTime = startTimeList.Any() && endDate == null && !endTimeList.Any();
startDate = startDate ?? TimeConverter.ConvertUtcToUserTime(DateTime.UtcNow, userTimeZone);
endDate = endDate ?? startDate ?? TimeConverter.ConvertUtcToUserTime(DateTime.UtcNow, userTimeZone);
var searchStartTimeList = new List <DateTime>();
var searchEndTimeList = new List <DateTime>();
if (startTimeList.Any())
{
foreach (var time in startTimeList)
{
searchStartTimeList.Add(TimeZoneInfo.ConvertTimeToUtc(
new DateTime(startDate.Value.Year, startDate.Value.Month, startDate.Value.Day, time.Hour, time.Minute, time.Second),
userTimeZone));
}
}
else
{
searchStartTimeList.Add(TimeZoneInfo.ConvertTimeToUtc(
new DateTime(startDate.Value.Year, startDate.Value.Month, startDate.Value.Day), userTimeZone));
}
if (endTimeList.Any())
{
foreach (var time in endTimeList)
{
searchEndTimeList.Add(TimeZoneInfo.ConvertTimeToUtc(
new DateTime(endDate.Value.Year, endDate.Value.Month, endDate.Value.Day, time.Hour, time.Minute, time.Second),
userTimeZone));
}
}
else
{
searchEndTimeList.Add(TimeZoneInfo.ConvertTimeToUtc(
new DateTime(endDate.Value.Year, endDate.Value.Month, endDate.Value.Day, 23, 59, 59), userTimeZone));
}
DateTime?searchStartTime = null;
if (searchByStartTime)
{
foreach (var startTime in searchStartTimeList)
{
rawEvents = await calendarService.GetEventsByStartTimeAsync(startTime);
if (rawEvents.Any())
{
searchStartTime = startTime;
break;
}
}
}
else
{
for (var i = 0; i < searchStartTimeList.Count(); i++)
{
rawEvents = await calendarService.GetEventsByTimeAsync(
searchStartTimeList[i],
searchEndTimeList.Count() > i?searchEndTimeList[i] : searchEndTimeList[0]);
if (rawEvents.Any())
{
searchStartTime = searchStartTimeList[i];
break;
}
}
}
foreach (var item in rawEvents)
{
if (item.StartTime >= searchStartTime && item.IsCancelled != true)
{
resultEvents.Add(item);
}
}
return(resultEvents);
}