public FrequencyComponents GetClientFrequencyComponents()
{
var result = new FrequencyComponents {
Recurrence = Recurrence
};
switch (Recurrence)
{
case RecurrenceType.Instant:
break;
case RecurrenceType.Daily:
result.Time = ClientRunTime.TimeOfDay;
break;
case RecurrenceType.Weekly:
result.Time = ClientRunTime.TimeOfDay;
result.WeekDay = ClientRunTime.DayOfWeek;
break;
case RecurrenceType.Monthly:
result.Time = ClientRunTime.TimeOfDay;
result.Day = ClientRunTime.Day;
result.IsLastDayOfMonth = result.Day >= 28;
break;
default:
throw new ArgumentOutOfRangeException(nameof(Recurrence), Recurrence, $"{nameof(Recurrence)} was out of range.");
}
return(result);
}
public static Frequency FromClientFrequencyComponents(FrequencyComponents clientComponents, TimeZoneInfo clientTimeZone)
{
if (clientComponents == null)
{
throw new ArgumentNullException(nameof(clientComponents));
}
if (clientTimeZone == null)
{
throw new ArgumentNullException(nameof(clientTimeZone));
}
var clientNow = TimeZoneInfo.ConvertTime(DateTime.UtcNow, TimeZoneInfo.Utc, clientTimeZone);
var nearestClientRunTime = clientNow;
var minutes = TimeSpan.FromMinutes((clientNow.Hour * 60) + clientNow.Minute);
// NOTE: logic should break with InvalidOperationException because of invalid object state if any
// ReSharper disable PossibleInvalidOperationException
if (clientComponents.Recurrence == RecurrenceType.Daily && clientComponents.Time.Value <= minutes)
{
nearestClientRunTime = new DateTime(clientNow.Year, clientNow.Month, clientNow.Day).Add(TimeSpan.FromHours(24) + clientComponents.Time.Value);
}
else if (clientComponents.Recurrence == RecurrenceType.Weekly && (clientNow.DayOfWeek != clientComponents.WeekDay.Value || clientComponents.Time.Value <= minutes))
{
var daysToAdd = ((int)clientComponents.WeekDay.Value - (int)clientNow.DayOfWeek + 7) % 7;
var nearestWeekDay = clientNow.AddDays(daysToAdd == 0 ? 7 : daysToAdd);
nearestClientRunTime = new DateTime(nearestWeekDay.Year, nearestWeekDay.Month, nearestWeekDay.Day).Add(clientComponents.Time.Value);
}
else if (clientComponents.Recurrence == RecurrenceType.Monthly && (clientNow.Day != clientComponents.Day.Value || clientComponents.Time.Value <= minutes))
{
var daysLeftInCurrentMonth = DateTime.DaysInMonth(clientNow.Year, clientNow.Month) - clientNow.Day;
var daysToAdd = clientNow.Day < clientComponents.Day.Value
? clientComponents.IsLastDayOfMonth.HasValue && clientComponents.IsLastDayOfMonth.Value
? daysLeftInCurrentMonth
: clientComponents.Day.Value - clientNow.Day
: clientComponents.IsLastDayOfMonth.HasValue && clientComponents.IsLastDayOfMonth.Value
? daysLeftInCurrentMonth + DateTime.DaysInMonth(clientNow.Year, clientNow.Month + 1)
: daysLeftInCurrentMonth + clientComponents.Day.Value;
var nearestMonthDay = clientNow.AddDays(daysToAdd);
nearestClientRunTime = new DateTime(nearestMonthDay.Year, nearestMonthDay.Month, nearestMonthDay.Day).Add(clientComponents.Time.Value);
}
else if (clientComponents.Recurrence != RecurrenceType.Instant)
{
nearestClientRunTime = new DateTime(clientNow.Year, clientNow.Month, clientNow.Day).Add(clientComponents.Time.Value);
}
// ReSharper restore PossibleInvalidOperationException
var result = FromUtcDateTime(TimeZoneInfo.ConvertTime(nearestClientRunTime, clientTimeZone, TimeZoneInfo.Utc), clientComponents.Recurrence, clientTimeZone);
return(result);
}
