Beispiel #1
0
        public static DateTime GetNextDate(this RecurringTransaction model, out bool isValid)
        {
            var date = model.StartDate;

            isValid = true;

            switch (model.Type)
            {
            case RecurringType.Once:
            case RecurringType.Daily:
            {
                // the start date is the current date
                break;
            }

            case RecurringType.SemiMonthly:
            case RecurringType.Monthly:
            {
                // the start date is the minimum date to start
                var seed        = date.FirstOfMonth();
                var day         = (int)model.DayOfMonth;
                var desiredDate = DateTime.MinValue;
                do
                {
                    desiredDate = DateMath.GetDate(day, seed);
                    seed        = seed.AddMonths(1);
                } while (model.StartDate > desiredDate);
                date = desiredDate;
                break;
            }

            case RecurringType.Weekly:
            {
                // the start date is the minimum date to start
                if (model.Days != RecurringDayOfWeek.None)
                {
                    while (!model.Days.Contains(date.DayOfWeek))
                    {
                        date = date.AddDays(1);
                    }
                }
                else
                {
                    isValid = false;
                }
                break;
            }
            }

            return(date);
        }
Beispiel #2
0
        public static IEnumerable <DateTime> GenerateDates(this RecurringTransaction model, DateTime date, DateTime max)
        {
            var isDay1 = true;

            var week = new Queue <DateTime>(DateMath.GetWeek(date));

            week.Dequeue();

            var dateCount = 0;

            while (date < max)
            {
                if (model.EndType == RecurringEndType.ByDate && date.Date >= model.EndDate)
                {
                    break;
                }

                yield return(date.Date);

                ++dateCount;

                if (model.Type == RecurringType.Once)
                {
                    // that's it
                    break;
                }

                if (model.EndType == RecurringEndType.ByCount && dateCount >= model.MaxOccurrences)
                {
                    break;
                }

                switch (model.Type)
                {
                case RecurringType.Daily:
                {
                    date = date.AddDays(model.Period);
                    break;
                }

                case RecurringType.Monthly:
                {
                    var seed = date.AddMonths(model.Period);
                    date = DateMath.GetDate((int)model.DayOfMonth, seed);
                    break;
                }

                case RecurringType.SemiMonthly:
                {
                    if (isDay1)
                    {
                        // the current date is day1, so get day2
                        date   = DateMath.GetDate((int)model.DayOfMonth2, date);
                        isDay1 = false;
                    }
                    else
                    {
                        // get day1 again
                        var seed = date.AddMonths(model.Period);
                        date   = DateMath.GetDate((int)model.DayOfMonth, seed);
                        isDay1 = true;
                    }
                    break;
                }

                case RecurringType.Weekly:
                {
                    while (week.Count > 0)
                    {
                        date = week.Dequeue();
                        if (model.Days.Contains(date.DayOfWeek))
                        {
                            break;
                        }
                    }

                    if (week.Count == 0 && !model.Days.Contains(date.DayOfWeek))
                    {
                        // we've gone through the week; no more dates left
                        // so start over again at next week
                        date = date.AddDays(-6).AddDays(7 * model.Period);
                        while (!model.Days.Contains(date.DayOfWeek))
                        {
                            date = date.AddDays(1);
                        }

                        week = new Queue <DateTime>(DateMath.GetWeek(date));
                        week.Dequeue();
                    }
                    break;
                }
                }
            }
        }