internal static IEnumerable <CalculationOccurrence> CalculateOccurrences(CalculationTrigger trigger, DateTime startDate, DateTime?endDate)
{
if (trigger == null)
{
throw new ArgumentNullException("trigger");
}
List <CalculationTrigger> triggers = new List <CalculationTrigger>()
{
trigger
};
return(CalculateOccurrences(triggers, startDate, endDate));
}
internal static IEnumerable <DateTime> CalculateOccurrenceDates(CalculationTrigger trigger, DateTime startDate, DateTime?endDate)
{
//var occurrences = GetOccurrencesWithRecurrenceEvaluation(new Collection<CalculationTrigger> { trigger }, startDate, endDate);
var occurrences = CalculateOccurrences(new List <CalculationTrigger> {
trigger
}, startDate, endDate);
if (occurrences == null)
{
return(new List <DateTime>());
}
else
{
return(occurrences.Select(it => it.ScheduledDate).ToList());
}
}
private static CalculationOccurrence CreateCalendarEventOccurrence(DateTime date, CalculationTrigger trigger)
{
CalculationOccurrence occurrence = new CalculationOccurrence();
occurrence.Trigger = trigger;
occurrence.Status = OccurrenceStatus.Undue;
if (trigger.Recurrence != null && trigger.Recurrence.FollowTheEndOfMonth == true)
{
date = ToEoM(date);
if (trigger.TriggerEndDate.HasValue && date > trigger.TriggerEndDate)
{
date = trigger.TriggerEndDate.Value;
}
}
occurrence.ScheduledDate = date;
return(occurrence);
}
internal static IEnumerable <CalculationOccurrence> GetOccurrencesWithRecurrenceEvaluation(CalculationTrigger trigger, DateTime startDate, DateTime?endDate)
{
if (trigger == null)
{
throw new ArgumentNullException("trigger");
}
List <CalculationTrigger> events = new List <CalculationTrigger>()
{
trigger
};
return(GetOccurrencesWithRecurrenceEvaluation(events, startDate, endDate));
}
private static IEnumerable <CalculationOccurrence> GetDatesInternal(CalculationTrigger trigger, DateTime startDate, DateTime endDate)
{
List <CalculationOccurrence> dates = new List <CalculationOccurrence>();
if (trigger == null)
{
return(dates);
}
if (trigger.ScheduleRecurrenceType == ScheduleRecurrenceType.Custom)
{
if (trigger.Occurrences != null)
{
dates.AddRange(trigger.Occurrences);
}
return(dates);
}
// Fix dates
trigger.TriggerStartDate = trigger.TriggerStartDate.Date;
startDate = startDate.Date;
endDate = endDate.Date;
if (trigger.TriggerStartDate > startDate)
{
startDate = trigger.TriggerStartDate;
}
DateTime date = startDate;
if (trigger.Recurrence == null || trigger.ScheduleRecurrenceType == ScheduleRecurrenceType.SingleOccurrence)
{
if (IsInRange(date, startDate, endDate) == false)
{
return(dates);
}
dates.Add(CreateCalendarEventOccurrence(date, trigger));
return(dates);
}
if (trigger.Recurrence == null)
{
return(dates);
}
if (trigger.Recurrence.IterationPeriodNumerator == 0)
{
trigger.Recurrence.IterationPeriodNumerator = 1;
}
long currentNumberOfOccurences = 0;
switch (trigger.Recurrence.RecurrencePattern)
{
case RecurrencePattern.Daily:
#region Daily
if (trigger.Recurrence.DailyRecurrencePatternType.HasValue == false)
{
trigger.Recurrence.DailyRecurrencePatternType = DailyRecurrencePatternType.EveryNDays;
}
switch (trigger.Recurrence.DailyRecurrencePatternType.Value)
{
case DailyRecurrencePatternType.EveryNDays:
#region Every N Days
if (trigger.Recurrence.IterationPeriodNumerator > 0)
{
date = startDate;
while (ShouldCreateOccurrence(trigger.ScheduleRecurrenceType, date, endDate, currentNumberOfOccurences, trigger.Recurrence.MaxOccurances))
{
dates.Add(CreateCalendarEventOccurrence(date, trigger));
currentNumberOfOccurences++;
date = date.AddDays(trigger.Recurrence.IterationPeriodNumerator);
}
}
else
{
date = endDate;
while (ShouldCreateOccurrence(trigger.ScheduleRecurrenceType, startDate, date, currentNumberOfOccurences, trigger.Recurrence.MaxOccurances))
{
dates.Add(CreateCalendarEventOccurrence(date, trigger));
currentNumberOfOccurences++;
date = date.AddDays(trigger.Recurrence.IterationPeriodNumerator);
}
}
#endregion
break;
case DailyRecurrencePatternType.EveryWeekday:
#region Every week day
date = startDate;
while (ShouldCreateOccurrence(trigger.ScheduleRecurrenceType, date, endDate, currentNumberOfOccurences, trigger.Recurrence.MaxOccurances))
{
if (IsWorkingDay(date))
{
dates.Add(CreateCalendarEventOccurrence(date, trigger));
currentNumberOfOccurences++;
}
date = date.AddDays(1);
}
#endregion
break;
default:
throw new NotSupportedException(string.Format("DailyRecurrencePatternType {0} is not supported.", trigger.Recurrence.DailyRecurrencePatternType));
}
break;
#endregion
case RecurrencePattern.Weekly:
#region Weekly
if (trigger.Recurrence.DayOfWeek.HasValue == false)
{
throw new Exception("Value of Recurrence.DayOfWeek is not set, it is null.");
}
var multiplier = Math.Abs(trigger.Recurrence.IterationPeriodNumerator);
#region Create list of dates from flag enumeration daysOfWeek
var daysOfWeek = new List <DayOfWeek>();
foreach (DayOfWeek dayOfWeek in Enum.GetValues(typeof(DayOfWeek)))
{
if (trigger.Recurrence.DayOfWeek.HasValue &&
trigger.Recurrence.DayOfWeek.Value.HasFlag(dayOfWeek))
{
daysOfWeek.Add(dayOfWeek);
}
}
#endregion
#region Set first date
date = startDate;
if (!daysOfWeek.Where(a => a == date.DayOfWeek).Any())
{
if (daysOfWeek.Where(a => a > date.DayOfWeek).Any())
{
var currentDayOfWeek = daysOfWeek.Where(a => a > date.DayOfWeek).FirstOrDefault();
while (date.DayOfWeek != currentDayOfWeek)
{
date = date.AddDays(1);
}
}
else
{
var currentDayOfWeek = daysOfWeek.FirstOrDefault();
date = date.AddDays(7 * multiplier);
while (date.DayOfWeek != currentDayOfWeek)
{
date = date.AddDays(-1);
}
}
}
#endregion
#region Create And Add Create Occurrences
while (ShouldCreateOccurrence(trigger.ScheduleRecurrenceType, date, endDate, currentNumberOfOccurences, trigger.Recurrence.MaxOccurances))
{
dates.Add(CreateCalendarEventOccurrence(date, trigger));
currentNumberOfOccurences++;
if (daysOfWeek.Where(a => a > date.DayOfWeek).Any())
{
var currentDayOfWeek = daysOfWeek.Where(a => a > date.DayOfWeek).FirstOrDefault();
while (date.DayOfWeek != currentDayOfWeek)
{
date = date.AddDays(1);
}
}
else
{
var currentDayOfWeek = daysOfWeek.FirstOrDefault();
date = date.AddDays(7 * multiplier);
while (date.DayOfWeek != currentDayOfWeek)
{
date = date.AddDays(-1);
}
}
}
#endregion
break;
#endregion
case RecurrencePattern.Monthly:
#region Monthly
if (trigger.Recurrence.MonthlyRecurrencePatternType.HasValue == false)
{
trigger.Recurrence.MonthlyRecurrencePatternType = MonthlyRecurrencePatternType.DayOfMonth;
}
trigger.Recurrence.IterationPeriodNumerator = Math.Abs(trigger.Recurrence.IterationPeriodNumerator);
switch (trigger.Recurrence.MonthlyRecurrencePatternType.Value)
{
case MonthlyRecurrencePatternType.DayOfMonth:
#region Day Of Month
if (trigger.Recurrence.DayOfMonth.HasValue == false)
{
trigger.Recurrence.DayOfMonth = startDate.Day;
//throw new CalculationServiceException("Value of Recurrence.DayOfMonth is not set, it is null.");
}
#region Set first date
if (startDate.Day == trigger.Recurrence.DayOfMonth)
{
date = startDate;
}
else
{
int day = DateTime.DaysInMonth(date.Year, date.Month) < trigger.Recurrence.DayOfMonth.Value ? DateTime.DaysInMonth(date.Year, date.Month) : trigger.Recurrence.DayOfMonth.Value;
date = new DateTime(date.Year, date.Month, day);
while (date < startDate)
{
date = date.AddMonths(1);
day = DateTime.DaysInMonth(date.Year, date.Month) < trigger.Recurrence.DayOfMonth.Value ? DateTime.DaysInMonth(date.Year, date.Month) : trigger.Recurrence.DayOfMonth.Value;
date = new DateTime(date.Year, date.Month, day);
}
}
#endregion
#region Create And Add Create Occurrences
while (ShouldCreateOccurrence(trigger.ScheduleRecurrenceType, date, endDate, currentNumberOfOccurences, trigger.Recurrence.MaxOccurances))
{
dates.Add(CreateCalendarEventOccurrence(date, trigger));
currentNumberOfOccurences++;
date = date.AddMonths(trigger.Recurrence.IterationPeriodNumerator);
int day = DateTime.DaysInMonth(date.Year, date.Month) < trigger.Recurrence.DayOfMonth.Value ? DateTime.DaysInMonth(date.Year, date.Month) : trigger.Recurrence.DayOfMonth.Value;
date = new DateTime(date.Year, date.Month, day);
}
#endregion
#endregion
break;
case MonthlyRecurrencePatternType.DayOfWeekOfMonth:
#region Day of week of month
if (trigger.Recurrence.DayOfWeek.HasValue == false)
{
throw new Exception("Value of Recurrence.DayOfWeek is not set, it is null.");
}
if (trigger.Recurrence.WeekOfMonth.HasValue == false)
{
throw new Exception("Value of Recurrence.WeekOfMonth is not set, it is null.");
}
#region Set first date
date = FindDayOfWeekOfMonth(trigger.Recurrence.DayOfWeek.GetValueOrDefault(),
(WeekOfMonth)trigger.Recurrence.WeekOfMonth,
new DateTime(startDate.Year, startDate.Month, 1));
if (date < startDate)
{
date = FindDayOfWeekOfMonth(trigger.Recurrence.DayOfWeek.GetValueOrDefault(),
(WeekOfMonth)trigger.Recurrence.WeekOfMonth,
new DateTime(date.Year, date.Month, 1).AddMonths(1));
}
#endregion
#region Create and add Occurence
while (ShouldCreateOccurrence(trigger.ScheduleRecurrenceType, date, endDate, currentNumberOfOccurences, trigger.Recurrence.MaxOccurances))
{
dates.Add(CreateCalendarEventOccurrence(date, trigger));
currentNumberOfOccurences++;
date = FindDayOfWeekOfMonth(trigger.Recurrence.DayOfWeek.GetValueOrDefault(),
(WeekOfMonth)trigger.Recurrence.WeekOfMonth,
new DateTime(date.Year, date.Month, 1).AddMonths(1));
}
#endregion
#endregion
break;
default:
throw new NotSupportedException(string.Format("MonthlyRecurrencePatternType {0} is not supported.", trigger.Recurrence.MonthlyRecurrencePatternType));;
}
break;
#endregion
case RecurrencePattern.Yearly:
#region Yearly
if (trigger.Recurrence.MonthlyRecurrencePatternType.HasValue == false)
{
trigger.Recurrence.MonthlyRecurrencePatternType = MonthlyRecurrencePatternType.DayOfMonth;
}
trigger.Recurrence.IterationPeriodNumerator = Math.Abs(trigger.Recurrence.IterationPeriodNumerator);
switch (trigger.Recurrence.MonthlyRecurrencePatternType.Value)
{
case MonthlyRecurrencePatternType.DayOfMonth:
if (trigger.Recurrence.DayOfMonth.HasValue == false)
{
trigger.Recurrence.DayOfMonth = startDate.Day;
//throw new CalculationServiceException("Value of Recurrence.DayOfMonth is not set.");
}
if (trigger.Recurrence.MonthOfYear.HasValue == false)
{
throw new NullReferenceException("Value of Recurrence.MonthOfYear is not set.");
}
#region Set start date
int month = GetMonthNumber(trigger.Recurrence.MonthOfYear.Value);
int day = DateTime.DaysInMonth(date.Year, date.Month) < trigger.Recurrence.DayOfMonth.Value
? DateTime.DaysInMonth(date.Year, date.Month)
: trigger.Recurrence.DayOfMonth.Value;
date = new DateTime(date.Year, month, day);
while (date < startDate)
{
date = date.AddYears(1);
}
#endregion
#region Create And Add Create Occurrences
while (ShouldCreateOccurrence(trigger.ScheduleRecurrenceType, date, endDate, currentNumberOfOccurences, trigger.Recurrence.MaxOccurances))
{
dates.Add(CreateCalendarEventOccurrence(date, trigger));
currentNumberOfOccurences++;
date = date.AddYears(trigger.Recurrence.IterationPeriodNumerator);
}
#endregion
break;
case MonthlyRecurrencePatternType.DayOfWeekOfMonth:
if (trigger.Recurrence.DayOfWeek.HasValue == false)
{
throw new Exception("Value of Recurrence.DayOfWeek is not set, it is null.");
}
if (trigger.Recurrence.WeekOfMonth.HasValue == false)
{
throw new Exception("Value of Recurrence.WeekOfMonth is not set, it is null.");
}
if (trigger.Recurrence.MonthOfYear.HasValue == false)
{
throw new Exception("Value of Recurrence.MonthOfYear is not set, it is null.");
}
#region Set start date
date = new DateTime(startDate.Year, GetMonthNumber((MonthOfYear)trigger.Recurrence.MonthOfYear), 1);
date = FindDayOfWeekOfMonth(trigger.Recurrence.DayOfWeek.GetValueOrDefault(),
(WeekOfMonth)trigger.Recurrence.WeekOfMonth,
new DateTime(date.Year, GetMonthNumber((MonthOfYear)trigger.Recurrence.MonthOfYear), 1));
if (date < startDate)
{
date = FindDayOfWeekOfMonth(trigger.Recurrence.DayOfWeek.GetValueOrDefault(),
(WeekOfMonth)trigger.Recurrence.WeekOfMonth,
new DateTime(date.Year + 1, GetMonthNumber((MonthOfYear)trigger.Recurrence.MonthOfYear), 1));
}
#endregion
#region Create and Add Occurrences
while (ShouldCreateOccurrence(trigger.ScheduleRecurrenceType, date, endDate, currentNumberOfOccurences, trigger.Recurrence.MaxOccurances))
{
dates.Add(CreateCalendarEventOccurrence(date, trigger));
currentNumberOfOccurences++;
date = FindDayOfWeekOfMonth(trigger.Recurrence.DayOfWeek.GetValueOrDefault(),
(WeekOfMonth)trigger.Recurrence.WeekOfMonth,
new DateTime(date.Year + 1, GetMonthNumber((MonthOfYear)trigger.Recurrence.MonthOfYear), 1));
}
#endregion
break;
default:
throw new NotSupportedException(string.Format("MonthlyRecurrencePatternType {0} is not supported.", trigger.Recurrence.MonthlyRecurrencePatternType));;
}
break;
#endregion
default:
throw new NotSupportedException(string.Format("RecurrencePattern {0} is not supported.", trigger.Recurrence.RecurrencePattern));;
}
return(dates);
}
