/*********************************************************************************************
 * Copyright 2005 - Volian Enterprises, Inc. All rights reserved.
 * Volian Enterprises - Proprietary Information - DO NOT COPY OR DISTRIBUTE
 * ------------------------------------------------------------------------------
 * $Workfile: RefList.cs $     $Revision: 3 $
 * $Author: Jsj $   $Date: 7/21/06 2:59p $
 *
 * $History: RefList.cs $
 * 
 * *****************  Version 3  *****************
 * User: Jsj          Date: 7/21/06    Time: 2:59p
 * Updated in $/LibSource/VEObject
 * The File for Edit Depenencies was being created in the wrong place for
 * VFW to find.
 * 
 * *****************  Version 2  *****************
 * User: Kathy        Date: 3/22/05    Time: 10:11a
 * Updated in $/LibSource/VEObject
 * clean up code
 * 
 * *****************  Version 1  *****************
 * User: Kathy        Date: 3/08/05    Time: 1:51p
 * Created in $/LibSource/VEObject
 * Approval
 *********************************************************************************************/
using System;
using System.IO;
using System.Text;
using System.Windows.Forms;
using Utils;


namespace VEObject
{
	/// <summary>
	/// Summary description for RefList.
	/// 
	/// The RefList class creates, reads, writes, and deletes a file
	/// of the 'input' name to hold procedure numbers/sequence numbers that
	/// represent dependencies that need to be addressed (i.e. removed) by
	/// the user in the editor. This is either for resolving approve selected
	/// conflicts or deleting a procedure with transitions. (actual current use is
	/// for approve selected conflicts). 
	/// The contents of this file is read in and listed via the TranRefsDlg in vfw
	/// for now, i.e. as long as vfw is the editor.
	/// The 'input' file is created in the user's Temp directory when in multi-user 
	/// mode or in the procedure directory when a lock is set or when in single user \
	/// mode.
	/// </summary>
	public class RefList
	{
		private string FileName;
		private string FromProcNum;
		private FileStream FSRef;
		private BinaryWriter BWRef;
		private UserRunTime usrRunTime;
		private long HeaderOffset;
		private Int16 NumRefs;

		public RefList(string frmProcNum, string fname, UserRunTime urt)
		{
			FileName = fname;
			usrRunTime=urt;
			FromProcNum=frmProcNum;
			NumRefs=0;
			BWRef = null;
		}

		public bool Create()
		{
			try
			{
// Bug fix B2006-034
//         Note that ExeAdjust() needs to check for a lock set.
//         When a lock is set, the xE7 char would act like the xE2 char in
//         the ExeAdjust() function.
//         This bug fix is taking advantage of the fact that lock must be set
//         at the time the approval code reaches this logic.
//
//				FSRef = new FileStream(usrRunTime.ExeAdjust("\xE7" + FileName),FileMode.Create,FileAccess.Write,FileShare.ReadWrite);
				FSRef = new FileStream(usrRunTime.ExeAdjust("\xE2" + FileName),FileMode.Create,FileAccess.Write,FileShare.ReadWrite);
				BWRef = new BinaryWriter(FSRef);
				BWRef.Write(NumRefs);		// Temporary holding for number of references
				Int16 len = (Int16)FromProcNum.Length;
				BWRef.Write(len);
				byte[] btmp = Encoding.ASCII.GetBytes(FromProcNum);
				BWRef.Write(btmp,0,len);
				HeaderOffset = FSRef.Length;
			}
			catch (Exception e)
			{
				MessageBox.Show(e.Message);
				return false;
			}
			return true;
		}
		
		public void CloseFile()
		{
			if (BWRef != null) BWRef.Close();
			FSRef=null;
			BWRef=null;
			NumRefs=0;
			HeaderOffset=0;
		}

		public void WriteTotalNumRefs()
		{
			FSRef.Seek(0,System.IO.SeekOrigin.Begin);
			BWRef.Write(NumRefs);
			FSRef.Seek(0,System.IO.SeekOrigin.End);
		}

		public void WriteRefLine(string refline)
		{
			byte[] btmp = Encoding.ASCII.GetBytes(refline);
			BWRef.Write(btmp,0,100);
			NumRefs++;
		}
	}
}