public async Task <List <CalendarItem> > CreateRecurrenceCalendarItemsAsync(CalendarItem item, DateTime start)
{
var calendarItems = new List <CalendarItem>();
if (!item.RecurrenceEnd.HasValue || item.RecurrenceEnd > DateTime.UtcNow && item.Start >= start)
{
var department = await _departmentsService.GetDepartmentByIdAsync(item.DepartmentId, false);
var currentTime = item.Start.TimeConverter(department);
DateTime startTimeConverted = item.Start.TimeConverter(department);
var length = item.GetDifferenceBetweenStartAndEnd();
if (item.RecurrenceType == (int)RecurrenceTypes.Weekly)
{
DateTime weekWorkingDate = currentTime;
int weekProcssed = 1;
var nextWeek = GetNextWeekValues(item, weekWorkingDate);
while (weekProcssed <= 52)
{
foreach (var day in nextWeek)
{
if (day != null)
{
if (calendarItems.All(x => x.Start.Date != day.Value.Date))
{
var startDate = DateTimeHelpers.GetLocalDateTime(new DateTime(day.Value.Year, day.Value.Month, day.Value.Day,
startTimeConverted.Hour, startTimeConverted.Minute, startTimeConverted.Second), department.TimeZone);
var endDate = startDate.Add(length);
calendarItems.Add(item.CreateRecurranceItem(startDate, endDate, department.TimeZone));
}
}
}
weekWorkingDate = weekWorkingDate.AddDays(7);
nextWeek = GetNextWeekValues(item, weekWorkingDate);
weekProcssed++;
}
}
else if (item.RecurrenceType == (int)RecurrenceTypes.Monthly && item.RepeatOnDay == 0)
{ // This is a repeat on every 15th of the month
DateTime monthWorkingDate = currentTime;
int monthProcessed = 1;
while (monthProcessed <= 12)
{
var monthDate = monthWorkingDate.AddMonths(monthProcessed);
var startDate = DateTimeHelpers.GetLocalDateTime(new DateTime(monthDate.Year, monthDate.Month, item.RepeatOnMonth,
startTimeConverted.Hour, startTimeConverted.Minute, startTimeConverted.Second), department.TimeZone);
var endDate = startDate.Add(length);
calendarItems.Add(item.CreateRecurranceItem(startDate, endDate, department.TimeZone));
monthProcessed++;
}
}
else if (item.RecurrenceType == (int)RecurrenceTypes.Monthly && item.RepeatOnDay > 0)
{ // This is a repeat on every nth day of the month
DateTime monthWorkingDate = currentTime;
int monthProcessed = 1;
while (monthProcessed <= 12)
{
var monthDate = monthWorkingDate.AddMonths(monthProcessed);
var startDateDay = DateTimeHelpers.FindDay(monthDate.Year, monthDate.Month, (DayOfWeek)item.RepeatOnDay,
item.RepeatOnMonth);
var startDate = DateTimeHelpers.GetLocalDateTime(new DateTime(monthDate.Year, monthDate.Month, startDateDay,
startTimeConverted.Hour, startTimeConverted.Minute, startTimeConverted.Second), department.TimeZone);
var endDate = startDate.Add(length);
calendarItems.Add(item.CreateRecurranceItem(startDate, endDate, department.TimeZone));
monthProcessed++;
}
}
else if (item.RecurrenceType == (int)RecurrenceTypes.Yearly)
{
DateTime yearlyWorkingDate = currentTime;
yearlyWorkingDate = yearlyWorkingDate.AddYears(1);
var startDate = DateTimeHelpers.GetLocalDateTime(new DateTime(yearlyWorkingDate.Year, startTimeConverted.Month, startTimeConverted.Day,
startTimeConverted.Hour, startTimeConverted.Minute, startTimeConverted.Second), department.TimeZone);
var endDate = startDate.Add(length);
calendarItems.Add(item.CreateRecurranceItem(startDate, endDate, department.TimeZone));
}
}
return(calendarItems);
}