<?php
  /**************************************************************************\
  * phpGroupWare - Setup                                                     *
  * http://www.phpgroupware.org                                              *
  * --------------------------------------------                             *
  *  This program is free software; you can redistribute it and/or modify it *
  *  under the terms of the GNU General Public License as published by the   *
  *  Free Software Foundation; either version 2 of the License, or (at your  *
  *  option) any later version.                                              *
  \**************************************************************************/

  /* $Id$ */

	class schema_proc_array
	{
		var $m_sStatementTerminator;

		function schema_proc_array()
		{
			$this->m_sStatementTerminator = ";";
		}

		/* Return a type suitable for DDL abstracted array */
		function TranslateType($sType, $iPrecision = 0, $iScale = 0, &$sTranslated)
		{
			$sTranslated = $sType;
			return (strlen($sTranslated) > 0);
		}

		function TranslateDefault($sDefault)
		{
			return $sDefault;
		}

		function GetPKSQL($sFields)
		{
			return "";
		}

		function GetUCSQL($sFields)
		{
			return "";
		}

		function _GetColumns($oProc, &$aTables, $sTableName, &$sColumns, $sDropColumn = "")
		{
			$sColumns = "";
			while (list($sName, $aJunk) = each($aTables[$sTableName]["fd"]))
			{
				if ($sColumns != "")
				{
					$sColumns .= ",";
				}
				$sColumns .= $sName;
			}

			return true;
		}

		function DropTable($oProc, &$aTables, $sTableName)
		{
			if (IsSet($aTables[$sTableName]))
			{
				UnSet($aTables[$sTableName]);
			}
			
			return true;
		}

		function DropColumn($oProc, &$aTables, $sTableName, $aNewTableDef, $sColumnName, $bCopyData = true)
		{
			if (IsSet($aTables[$sTableName]))
			{
				if (IsSet($aTables[$sTableName]["fd"][$sColumnName]))
				{
					UnSet($aTables[$sTableName]["fd"][$sColumnName]);
				}
			}

			return true;
		}

		function RenameTable($oProc, &$aTables, $sOldTableName, $sNewTableName)
		{
			$aNewTables = array();
			while (list($sTableName, $aTableDef) = each($aTables))
			{
				if ($sTableName == $sOldTableName)
				{
					$aNewTables[$sNewTableName] = $aTableDef;
				}
				else
				{
					$aNewTables[$sTableName] = $aTableDef;
				}
			}

			$aTables = $aNewTables;

			return true;
		}

		function RenameColumn($oProc, &$aTables, $sTableName, $sOldColumnName, $sNewColumnName, $bCopyData = true)
		{
			if (IsSet($aTables[$sTableName]))
			{
				$aNewTableDef = array();
				reset($aTables[$sTableName]["fd"]);
				while (list($sColumnName, $aColumnDef) = each($aTables[$sTableName]["fd"]))
				{
					if ($sColumnName == $sOldColumnName)
					{
						$aNewTableDef[$sNewColumnName] = $aColumnDef;
					}
					else
					{
						$aNewTableDef[$sColumnName] = $aColumnDef;
					}
				}

				$aTables[$sTableName]["fd"] = $aNewTableDef;

				reset($aTables[$sTableName]["pk"]);
				while (list($key, $sColumnName) = each($aTables[$sTableName]["pk"]))
				{
					if ($sColumnName == $sOldColumnName)
					{
						$aTables[$sTableName]["pk"][$key] = $sNewColumnName;
					}
				}

				reset($aTables[$sTableName]["uc"]);
				while (list($key, $sColumnName) = each($aTables[$sTableName]["uc"]))
				{
					if ($sColumnName == $sOldColumnName)
					{
						$aTables[$sTableName]["uc"][$key] = $sNewColumnName;
					}
				}
			}

			return true;
		}

		function AlterColumn($oProc, &$aTables, $sTableName, $sColumnName, &$aColumnDef, $bCopyData = true)
		{
			if (IsSet($aTables[$sTableName]))
			{
				if (IsSet($aTables[$sTableName]["fd"][$sColumnName]))
				{
					$aTables[$sTableName]["fd"][$sColumnName] = $aColumnDef;
				}
			}

			return true;
		}

		function AddColumn($oProc, &$aTables, $sTableName, $sColumnName, &$aColumnDef)
		{
			if (IsSet($aTables[$sTableName]))
			{
				if (!IsSet($aTables[$sTableName]["fd"][$sColumnName]))
				{
					$aTables[$sTableName]["fd"][$sColumnName] = $aColumnDef;
				}
			}

			return true;
		}

		function CreateTable($oProc, &$aTables, $sTableName, $aTableDef)
		{
			if (!IsSet($aTables[$sTableName]))
			{
				$aTables[$sTableName] = $aTableDef;
			}

			return true;
		}	
	}
?>