SharePoint CAML Query Builder Dialog for your Web Parts

using System;
using System.Collections.Generic;
using System.Text;

namespace Mullivan.SharePoint.Reminders
{
    public class RmdWeeklyRecurrence : RmdRecurrence
    {
        public override string Name
        {
            get { return "Weekly"; }
        }

        public int StartHour
        {
            get;
            set;
        }

        public DayOfWeek DayOfWeek
        {
            get;
            set;
        }

        public override bool CanRun(DateTime lastRun)
        {
            DateTime dtNow = DateTime.Now;

            //If never run then run
            if (lastRun.Equals(DateTime.MinValue))
                return true;

            //If there is a week between the two then it needs to run
            if (dtNow.Subtract(lastRun).Days > 7)
                return true;

            //Create nextOccurence with this day and start hour
            DateTime nextOccurence = new DateTime(lastRun.Year, lastRun.Month, lastRun.Day, this.StartHour, 0, 0);

            //Add a day if the lastRun is already greater than equal to the StartHour
            if(nextOccurence.DayOfWeek == this.DayOfWeek &&
                lastRun.Hour >= this.StartHour)
                nextOccurence = nextOccurence.Add(new TimeSpan(1, 0, 0, 0));

            //add a day until we get the correct day of week
            while (nextOccurence.DayOfWeek != this.DayOfWeek)
                nextOccurence = nextOccurence.Add(new TimeSpan(1, 0, 0, 0));

            if (dtNow >= nextOccurence)
                return true;

            return false;
        }
    }
}