public List<Date_Time> Evaluate(Date_Time StartDate, Date_Time FromDate, Date_Time ToDate)
{
List<Date_Time> DateTimes = new List<Date_Time>();
DateTimes.AddRange(StaticOccurrences);
// If the Recur is restricted by COUNT, we need to evaluate just
// after any static occurrences so it's correctly restricted to a
// certain number. NOTE: fixes bug #13 and bug #16
if (Count > 0)
{
FromDate = StartDate;
foreach (Date_Time dt in StaticOccurrences)
{
if (FromDate < dt)
FromDate = dt;
}
}
// Handle "UNTIL" values that are date-only. If we didn't change values here, "UNTIL" would
// exclude the day it specifies, instead of the inclusive behaviour it should exhibit.
if (Until != null && !Until.HasTime)
Until.Value = new DateTime(Until.Year, Until.Month, Until.Day, 23, 59, 59, Until.Value.Kind);
// Ignore recurrences that occur outside our time frame we're looking at
if ((Until != null && FromDate > Until) ||
ToDate < StartDate)
return DateTimes;
// Narrow down our time range further to avoid over-processing
if (Until != null && Until < ToDate)
ToDate = Until;
if (StartDate > FromDate)
FromDate = StartDate;
/*
// If the frequency is WEEKLY, and the interval is greater than 1,
// then we need to ensure that the StartDate occurs in one of the
// "active" weeks, to ensure that we properly "step" through weeks.
// NOTE: Fixes bug #1741093 - WEEKLY frequency eval behaves strangely
if (Frequency == FrequencyType.WEEKLY &&
Interval > 1)
{
// Get the week of year of the time frame we want to calculate
int firstEvalWeek = _Calendar.GetWeekOfYear(FromDate.Value, System.Globalization.CalendarWeekRule.FirstFourDayWeek, Wkst);
// Count backwards in years, calculating how many weeks' difference we have between
// start date and evaluation period.
Date_Time evalDate = FromDate;
while (evalDate.Year > StartDate.Year)
{
firstEvalWeek += _Calendar.GetWeekOfYear(new DateTime(evalDate.Year - 1, 12, 31), System.Globalization.CalendarWeekRule.FirstFourDayWeek, Wkst);
evalDate = evalDate.AddYears(-1);
}
// Determine the difference, in weeks, between the start date and the evaluation period.
int startWeek = _Calendar.GetWeekOfYear(StartDate.Value, System.Globalization.CalendarWeekRule.FirstFourDayWeek, Wkst);
int weeksDifference = firstEvalWeek - startWeek;
// Determine how many weeks the evaluation period needs to change
// in order to "align" to the start date week, given the specified interval.
int offset = 0;
while (weeksDifference % Interval != 0)
{
weeksDifference--;
offset++;
}
// Offset the week back to a "compatible" week for evaluation
FromDate = FromDate.AddDays(-offset * 7);
}*/
// If the interval is greater than 1, then we need to ensure that the StartDate occurs in one of the
// "active" days/weeks/months/years/etc. to ensure that we properly "step" through the interval.
// NOTE: Fixes bug #1741093 - WEEKLY frequency eval behaves strangely
if (Interval > 1)
{
// Determine the difference between our two dates, using our frequency as the UNIT.
long difference = DateUtils.DateDiff(this.Frequency, StartDate, FromDate, Wkst);
while (difference % Interval > 0)
{
FromDate = DateUtils.AddFrequency(this.Frequency, FromDate, -1);
difference--;
}
}
// Create a temporary recurrence for populating
// missing information using the 'StartDate'.
Recur r = new Recur();
r.CopyFrom(this);
// Enforce evaluation engine rules
r.EnforceEvaluationRestrictions();
// Fill in missing, necessary ByXXX values
r.EnsureByXXXValues(StartDate);
// Get the occurrences
foreach (Date_Time occurrence in r.GetOccurrences(FromDate.Copy(), ToDate, r.Count))
{
// NOTE:
// Used to be DateTime.AddRange(r.GetOccurrences(FromDate.Copy(), ToDate, r.Count))
// By doing it this way, fixes bug #19.
if (!DateTimes.Contains(occurrence))
DateTimes.Add(occurrence);
}
// Limit the count of returned recurrences
if (Count != int.MinValue &&
DateTimes.Count > Count)
DateTimes.RemoveRange(Count, DateTimes.Count - Count);
// Process the UNTIL, and make sure the DateTimes
// occur between FromDate and ToDate
for (int i = DateTimes.Count - 1; i >= 0; i--)
{
Date_Time dt = (Date_Time)DateTimes[i];
if (dt > ToDate ||
dt < FromDate)
DateTimes.RemoveAt(i);
}
// Assign missing values
foreach (Date_Time dt in DateTimes)
dt.MergeWith(StartDate);
// Ensure that DateTimes have an assigned time if they occur less than dailyB
foreach (Date_Time dt in DateTimes)
{
if (Frequency < FrequencyType.DAILY)
dt.HasTime = true;
}
return DateTimes;
}
public List<Date_Time> Evaluate(Date_Time StartDate, Date_Time FromDate, Date_Time ToDate)
{
List<Date_Time> DateTimes = new List<Date_Time>();
DateTimes.AddRange(StaticOccurrences);
// Create a temporary recurrence for populating
// missing information using the 'StartDate'.
Recur r = new Recur();
r.CopyFrom(this);
// Enforce evaluation engine rules
r.EnforceEvaluationRestrictions();
// Fill in missing, necessary ByXXX values
r.EnsureByXXXValues(StartDate);
// Get the occurrences
foreach (Date_Time occurrence in r.GetOccurrences(StartDate, FromDate.Copy(), ToDate.Copy(), r.Count))
{
// NOTE:
// Used to be DateTimes.AddRange(r.GetOccurrences(FromDate.Copy(), ToDate, r.Count))
// By doing it this way, fixes bug #19.
if (!DateTimes.Contains(occurrence))
DateTimes.Add(occurrence);
}
// Limit the count of returned recurrences
if (Count != int.MinValue &&
DateTimes.Count > Count)
DateTimes.RemoveRange(Count, DateTimes.Count - Count);
// Process the UNTIL, and make sure the DateTimes
// occur between FromDate and ToDate
for (int i = DateTimes.Count - 1; i >= 0; i--)
{
Date_Time dt = (Date_Time)DateTimes[i];
if (dt > ToDate ||
dt < FromDate)
DateTimes.RemoveAt(i);
}
// Assign missing values
foreach (Date_Time dt in DateTimes)
dt.MergeWith(StartDate);
// Ensure that DateTimes have an assigned time if they occur less than daily
foreach (Date_Time dt in DateTimes)
{
if (Frequency < FrequencyType.DAILY)
dt.HasTime = true;
}
return DateTimes;
}