///////////////////////////////////////////////////////////
//  Bool.cs
//  Implementation of Class NotifySubscribersListFetcher
//  CSLA type: Read-only object
//  Created on: 25-Nov-2009
//  Object design: John 
//	Coded: John 25-Nov-2009
///////////////////////////////////////////////////////////

using System;
using System.Data;
using CSLA.Data;
using GZTW.Data;
using CSLA;
using System.Threading;
using CSLA.Security;
using System.Collections.Generic;


namespace GZTW.AyaNova.BLL
{
#pragma warning disable 1591

    /// <summary>
	/// Used to quickly fetch a generic list of Guids of users
    /// who subscribe to a particular event
	/// 
	/// </summary>
	[Serializable]
	public class NotifySubscribersListFetcher : ReadOnlyBase 
	{

        private List<Guid> mSubscriberList;
		
		
		#region Constructor	

		/// <summary>
		/// Private constructor to prevent direct instantiation
		/// </summary>
		private NotifySubscribersListFetcher()
		{			
		
		}
		#endregion

		
		#region Business properties
        public List<Guid> SubscriberList { get { return mSubscriberList; } }     

      
		#endregion
		
		#region Static methods
		
		/// <summary>
		/// Retrieve generic List of id's of subscribers to particular event specified
		/// </summary>
        /// <param name="EventType">Event type for object</param>
		/// <param name="RootObjectType">Type of object</param>
        /// <param name="GuidValue">GuidValue for event or Guid.Empty if event doesn't support particular Guid value</param>
		/// <returns>NotifySubscribersListFetcher object</returns>
		public static List<Guid> GetItem(int EventType, RootObjectTypes RootObjectType, Guid GuidValue)
		{
			
			return ((NotifySubscribersListFetcher)DataPortal.Fetch(new Criteria(EventType,  RootObjectType, GuidValue))).SubscriberList;
						
		}

		

		
		#endregion

		#region DAL DATA ACCESS
		/// 
		/// <param Bool="Criteria"></param>
		protected override void DataPortal_Fetch(object Criteria)
		{
			Criteria crit = (Criteria)Criteria;
            mSubscriberList = new List<Guid>();
            DBCommandWrapper cmSub = DBUtil.DB.GetSqlStringCommandWrapper(
                    "SELECT aUserID FROM aNotifySubscription " +
                    "WHERE (aRootObjectType = @RootObjectType) AND (aEventType = @EventType) " +
                    (crit.GuidValue == Guid.Empty ? "" : "AND (aGuidValue = @GuidValue)")
                    );

            if (crit.GuidValue != Guid.Empty)
                cmSub.AddInParameter("@GuidValue", DbType.Guid, crit.GuidValue);

            cmSub.AddInParameter("@RootObjectType", DbType.Int16, (int)crit.RootObjectType);
            cmSub.AddInParameter("@EventType", DbType.Int16, crit.EventType);
            

		
			SafeDataReader dr = new SafeDataReader(DBUtil.DB.ExecuteReader(cmSub));

			//There may not be an existing record yet so if it can't read
			//assumes that there are no prior bank records for this object yet
			while (dr.Read())
			{
                Guid id = dr.GetGuid("AUSERID");
                if (!mSubscriberList.Contains(id))
                    mSubscriberList.Add(id);

				
			}
			dr.Close();
			
			
			
		}

		
		
		#endregion			

		#region criteria
		/// <summary>
		/// Criteria for identifying existing object
		/// </summary>
		[Serializable]
			private class Criteria
		{
			 
			public int EventType;
			public RootObjectTypes RootObjectType;
            public Guid GuidValue;

			public Criteria(int _EventType, RootObjectTypes _RootObjectType, Guid _GuidValue)
			{
				EventType=_EventType;
				RootObjectType=_RootObjectType;
                GuidValue = _GuidValue;
			}
			
		}
		#endregion
		
	}//end Bool
#pragma warning restore 1591
}//end Boolspace GZTW.AyaNova.BLL