/// <summary> /// This is used to find the starting point for the weekly frequency /// </summary> /// <param name="r">A reference to the recurrence</param> /// <param name="start">The recurrence start date</param> /// <param name="end">The recurrence end date</param> /// <param name="from">The start date of the range limiting the instances generated</param> /// <param name="to">The end date of the range limiting the instances generated</param> /// <returns>The first instance date or null if there are no more instances</returns> public RecurDateTime FindStart(Recurrence r, RecurDateTime start, RecurDateTime end, RecurDateTime from, RecurDateTime to) { RecurDateTime rdtWeek, rdt = new RecurDateTime(start); int adjust; // Get the difference between the recurrence start and the limiting range start DateTime dtStart = start.ToDateTime().Date.AddDays(0 - r.weekdayOffset); DateTime dtFrom = from.ToDateTime().Date; dtFrom = dtFrom.AddDays(0 - ((int)dtFrom.DayOfWeek + 7 - (int)r.WeekStart) % 7); // Adjust the date so that it's in range if(dtStart < dtFrom) { TimeSpan ts = dtFrom - dtStart; adjust = (ts.Days / 7) + r.Interval - 1; rdt.AddDays((adjust - (adjust % r.Interval)) * 7); } // If the start of the week is after the ranges, stop now rdtWeek = new RecurDateTime(rdt); rdtWeek.AddDays(0 - r.weekdayOffset); if(RecurDateTime.Compare(rdtWeek, end, RecurDateTime.DateTimePart.Day) > 0 || RecurDateTime.Compare(rdtWeek, to, RecurDateTime.DateTimePart.Day) > 0) return null; return rdt; }
/// <summary> /// This is used to find the starting point for the secondly frequency /// </summary> /// <param name="r">A reference to the recurrence</param> /// <param name="start">The recurrence start date</param> /// <param name="end">The recurrence end date</param> /// <param name="from">The start date of the range limiting the instances generated</param> /// <param name="to">The end date of the range limiting the instances generated</param> /// <returns>The first instance date or null if there are no more instances</returns> public RecurDateTime FindStart(Recurrence r, RecurDateTime start, RecurDateTime end, RecurDateTime from, RecurDateTime to) { RecurDateTime rdt = new RecurDateTime(start); int adjust; if (RecurDateTime.Compare(start, from, RecurDateTime.DateTimePart.Hour) < 0) { // Get the difference between the recurrence start and the limiting range start DateTime dtStart = start.ToDateTime(), dtFrom = from.ToDateTime(); // Adjust the date/time so that it's in range TimeSpan ts = dtFrom - dtStart; adjust = (int)ts.TotalSeconds + r.Interval - 1; rdt.AddSeconds(adjust - (adjust % r.Interval)); } if (RecurDateTime.Compare(rdt, end, RecurDateTime.DateTimePart.Hour) > 0 || RecurDateTime.Compare(rdt, to, RecurDateTime.DateTimePart.Hour) > 0) { return(null); } return(rdt); }
/// <summary> /// This is used to find the starting point for the daily frequency /// </summary> /// <param name="r">A reference to the recurrence</param> /// <param name="start">The recurrence start date</param> /// <param name="end">The recurrence end date</param> /// <param name="from">The start date of the range limiting the instances generated</param> /// <param name="to">The end date of the range limiting the instances generated</param> /// <returns>The first instance date or null if there are no more instances</returns> public RecurDateTime FindStart(Recurrence r, RecurDateTime start, RecurDateTime end, RecurDateTime from, RecurDateTime to) { RecurDateTime rdt = new RecurDateTime(start); int adjust; // Get the difference between the recurrence start and the limiting range start DateTime dtStart = start.ToDateTime().Date, dtFrom = from.ToDateTime().Date; // Adjust the date so that it's in range if (dtStart < dtFrom) { TimeSpan ts = dtFrom - dtStart; adjust = ts.Days + r.Interval - 1; rdt.AddDays(adjust - (adjust % r.Interval)); } if (RecurDateTime.Compare(rdt, end, RecurDateTime.DateTimePart.Day) > 0 || RecurDateTime.Compare(rdt, to, RecurDateTime.DateTimePart.Day) > 0) { return(null); } return(rdt); }
/// <summary> /// This is used to find the starting point for the weekly frequency /// </summary> /// <param name="r">A reference to the recurrence</param> /// <param name="start">The recurrence start date</param> /// <param name="end">The recurrence end date</param> /// <param name="from">The start date of the range limiting the instances generated</param> /// <param name="to">The end date of the range limiting the instances generated</param> /// <returns>The first instance date or null if there are no more instances</returns> public RecurDateTime FindStart(Recurrence r, RecurDateTime start, RecurDateTime end, RecurDateTime from, RecurDateTime to) { RecurDateTime rdtWeek, rdt = new RecurDateTime(start); int adjust; // Get the difference between the recurrence start and the limiting range start DateTime dtStart = start.ToDateTime().Date.AddDays(0 - r.weekdayOffset); DateTime dtFrom = from.ToDateTime().Date; dtFrom = dtFrom.AddDays(0 - ((int)dtFrom.DayOfWeek + 7 - (int)r.WeekStart) % 7); // Adjust the date so that it's in range if (dtStart < dtFrom) { TimeSpan ts = dtFrom - dtStart; adjust = (ts.Days / 7) + r.Interval - 1; rdt.AddDays((adjust - (adjust % r.Interval)) * 7); } // If the start of the week is after the ranges, stop now rdtWeek = new RecurDateTime(rdt); rdtWeek.AddDays(0 - r.weekdayOffset); if (RecurDateTime.Compare(rdtWeek, end, RecurDateTime.DateTimePart.Day) > 0 || RecurDateTime.Compare(rdtWeek, to, RecurDateTime.DateTimePart.Day) > 0) { return(null); } return(rdt); }
/// <summary> /// This is used to find the starting point for the minutely frequency /// </summary> /// <param name="r">A reference to the recurrence</param> /// <param name="start">The recurrence start date</param> /// <param name="end">The recurrence end date</param> /// <param name="from">The start date of the range limiting the instances generated</param> /// <param name="to">The end date of the range limiting the instances generated</param> /// <returns>The first instance date or null if there are no more instances</returns> public RecurDateTime FindStart(Recurrence r, RecurDateTime start, RecurDateTime end, RecurDateTime from, RecurDateTime to) { RecurDateTime rdt = new RecurDateTime(start); int adjust; if(RecurDateTime.Compare(start, from, RecurDateTime.DateTimePart.Hour) < 0) { // Get the difference between the recurrence start and the limiting range start DateTime dtStart = start.ToDateTime().AddSeconds(0 - start.Second), dtFrom = from.ToDateTime().AddSeconds(0 - from.Second); // Adjust the date/time so that it's in range TimeSpan ts = dtFrom - dtStart; adjust = (int)ts.TotalMinutes + r.Interval - 1; rdt.AddMinutes(adjust - (adjust % r.Interval)); } if(RecurDateTime.Compare(rdt, end, RecurDateTime.DateTimePart.Hour) > 0 || RecurDateTime.Compare(rdt, to, RecurDateTime.DateTimePart.Hour) > 0) return null; return rdt; }
/// <summary> /// This is used to find the starting point for the daily frequency /// </summary> /// <param name="r">A reference to the recurrence</param> /// <param name="start">The recurrence start date</param> /// <param name="end">The recurrence end date</param> /// <param name="from">The start date of the range limiting the instances generated</param> /// <param name="to">The end date of the range limiting the instances generated</param> /// <returns>The first instance date or null if there are no more instances</returns> public RecurDateTime FindStart(Recurrence r, RecurDateTime start, RecurDateTime end, RecurDateTime from, RecurDateTime to) { RecurDateTime rdt = new RecurDateTime(start); int adjust; // Get the difference between the recurrence start and the limiting range start DateTime dtStart = start.ToDateTime().Date, dtFrom = from.ToDateTime().Date; // Adjust the date so that it's in range if(dtStart < dtFrom) { TimeSpan ts = dtFrom - dtStart; adjust = ts.Days + r.Interval - 1; rdt.AddDays(adjust - (adjust % r.Interval)); } if(RecurDateTime.Compare(rdt, end, RecurDateTime.DateTimePart.Day) > 0 || RecurDateTime.Compare(rdt, to, RecurDateTime.DateTimePart.Day) > 0) return null; return rdt; }