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ScheduledItems/EventQueue.cs

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+/***************************************************************************
+ * Copyright Andy Brummer 2004-2005
+ * 
+ * This code is provided "as is", with absolutely no warranty expressed
+ * or implied. Any use is at your own risk.
+ *
+ * This code may be used in compiled form in any way you desire. This
+ * file may be redistributed unmodified by any means provided it is
+ * not sold for profit without the authors written consent, and
+ * providing that this notice and the authors name is included. If
+ * the source code in  this file is used in any commercial application
+ * then a simple email would be nice.
+ * 
+ **************************************************************************/
+
+using System;
+using System.Collections;
+
+namespace UtilidadesCSharp.Schedule
+{
+	/// <summary>
+	/// The event queue is a collection of scheduled items that represents the union of all child scheduled items.
+	/// This is useful for events that occur every 10 minutes or at multiple intervals not covered by the simple
+	/// scheduled items.
+	/// </summary>
+	public class EventQueue : IScheduledItem
+	{
+		public EventQueue()
+		{
+			_List = new ArrayList();
+		}
+		/// <summary>
+		/// Adds a ScheduledTime to the queue.
+		/// </summary>
+		/// <param name="time">The scheduled time to add</param>
+		public void Add(IScheduledItem time)
+		{
+			_List.Add(time);
+		}
+
+		/// <summary>
+		/// Clears the list of scheduled times.
+		/// </summary>
+		public void Clear()
+		{
+			_List.Clear();
+		}
+
+		/// <summary>
+		/// Adds the running time for all events in the list.
+		/// </summary>
+		/// <param name="Begin">The beginning time of the interval</param>
+		/// <param name="End">The end time of the interval</param>
+		/// <param name="List">The list to add times to.</param>
+		public void AddEventsInInterval(DateTime Begin, DateTime End, ArrayList List)
+		{
+			foreach(IScheduledItem st in _List)
+				st.AddEventsInInterval(Begin, End, List);
+			List.Sort();
+		}
+
+		/// <summary>
+		/// Returns the first time after the starting time for all events in the list.
+		/// </summary>
+		/// <param name="time">The starting time.</param>
+		/// <param name="AllowExact">If this is true then it allows the return time to match the time parameter, false forces the return time to be greater then the time parameter</param>
+		/// <returns>Either the next event after the input time or greater or equal to depending on the AllowExact parameter.</returns>
+		public DateTime NextRunTime(DateTime time, bool AllowExact)
+		{
+			DateTime next = DateTime.MaxValue;
+			//Get minimum datetime from the list.
+			foreach(IScheduledItem st in _List)
+			{
+				DateTime Proposed = st.NextRunTime(time, AllowExact);
+				next = (Proposed < next) ? Proposed : next;
+			}
+			return next;
+		}
+		private ArrayList _List;
+	}	 
+}