///////////////////////////////////////////////////////////
//  Bool.cs
//  Implementation of Class WorkorderInternalIDFetcher
//  CSLA type: Read-only object
//  Created on: 04-Feb-2006
//  Object design: John 
//	Coded: John 04-Feb-2006
///////////////////////////////////////////////////////////

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



namespace GZTW.AyaNova.BLL 
{
	/// <summary>
	/// Used to get the internal ID number of a workorder
	/// based on it's service number, quote number or 
	/// preventive maintenance number.
	/// 
	/// Also useful for checking for the existance of a workorder
	/// </summary>
	[Serializable]
	public class WorkorderInternalIDFetcher : ReadOnlyBase 
	{

		#region Attributes 		
		private Guid mWorkorderID;

		#endregion

		#region Constructor	

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

		#region Static methods	
		/// <summary>
		/// Get internal Guid ID value of workorder from string 
		/// representation of workorder or quote or pm number
		/// </summary>
		/// <param name="WorkorderNumber">Service number, Quote number or Preventive maintenance number</param>
		/// <param name="Type">Type of workorder (service, quote, pm)</param>
		/// <returns>Guid of workorder in database or Guid.Empty if not found or input string invalid</returns>
		public static Guid GetItem(string WorkorderNumber,WorkorderTypes Type)
		{
			if(WorkorderNumber==null || WorkorderNumber=="") return Guid.Empty;
			int nWO=0;
			Guid gWO=Guid.Empty;
			//TODO: .net 2.0 replace this with a try parse method
			try
			{
				nWO=int.Parse(WorkorderNumber);
			}
			catch
			{
				nWO=0;
			}

			if(nWO!=0)		
				return ((WorkorderInternalIDFetcher)DataPortal.Fetch(new Criteria(  nWO, Type))).mWorkorderID;
			else
				return Guid.Empty;
			
		}

		
		#endregion

		#region DAL DATA ACCESS
		/// 
		/// <param Bool="Criteria"></param>
		protected override void DataPortal_Fetch(object Criteria)
		{
			Criteria crit = (Criteria)Criteria;	
			SafeDataReader dr = null;
			DBCommandWrapper cm = null;
			try
			{
				
			
				switch(crit.Type)
				{
					case WorkorderTypes.PreventiveMaintenance:
						cm=DBUtil.GetCommandFromSQL(
							"SELECT  " +
							"AWORKORDERPREVENTIVEMAINTENANCE.AWORKORDERID " +
							"FROM " +
							"AWORKORDERPREVENTIVEMAINTENANCE " +
							"WHERE " +
							"(AWORKORDERPREVENTIVEMAINTENANCE.APREVENTIVEMAINTENANCENUMBER = @AVISIBLEID) " );
						break;

					case WorkorderTypes.Quote:
						cm=DBUtil.GetCommandFromSQL(
							"SELECT  " +
							"AWORKORDERQUOTE.AWORKORDERID " +
							"FROM " +
							"AWORKORDERQUOTE " +
							"WHERE " +
							"(AWORKORDERQUOTE.AQUOTENUMBER = @AVISIBLEID) " );
						break;

					case WorkorderTypes.Service:
						cm=DBUtil.GetCommandFromSQL(
							"SELECT  " +
							"AWORKORDERSERVICE.AWORKORDERID " +
							"FROM " +
							"AWORKORDERSERVICE " +
							"WHERE " +
							"(AWORKORDERSERVICE.ASERVICENUMBER = @AVISIBLEID) " );
						break;


				}

				cm.AddInParameter("@AVISIBLEID",DbType.Int32,crit.WorkorderNumber);
				dr=new SafeDataReader(DBUtil.DB.ExecuteReader(cm));

				if(dr.Read())
					mWorkorderID=dr.GetGuid("AWORKORDERID");
				else
					mWorkorderID=Guid.Empty;
				

				
			}
			catch
			{
				this.mWorkorderID=Guid.Empty;
			}
            finally
            {
                //Changed: 09-June-2006 this was missing!
                if (dr != null) dr.Close();
            }
			
		}

		
		
		#endregion			

		#region criteria
		/// <summary>
		/// Criteria for identifying existing object
		/// </summary>
		[Serializable]
			private class Criteria
		{
			public int WorkorderNumber;
			public WorkorderTypes Type;

			public Criteria(int _WorkorderNumber,WorkorderTypes _Type)
			{
				WorkorderNumber=_WorkorderNumber;
				Type=_Type;

			}
			
		}
		#endregion
		
	}//end Bool

}//end Boolspace GZTW.AyaNova.BLL