Source for file sptpl_clsCounter.php

<?php
/**
 * @copyright sptpl_clsCounter.php is part of Sptpl project {@link http://www.andrioli.com/en/sptpl.html} and it is LGPL
 * @author    Andrioli Darvin <darvin (inside) andrioli (dot) com>
 * @version   $Header: d:\cvs/classistd/sptpl/sptpl_clsCounter.php,v 2.2 2005/03/02 21:00:54 Darvin Exp $
 */
/*
 * +-------------------------------------------------------------------------+
 * | Sptpl                                                                   |
 * +-------------------------------------------------------------------------+
 * | Copyright (c) 2003-2005 Andrioli Darvin                                 |
 * | Email         <darvin (inside) andrioli (dot) com>                      |
 * | Web           http://www.andrioli.com/en/sptpl.html                     |
 * | Download      http://www.phpclasses.org/browse.html/package/1326.html   |
 * |                                                                         |
 * +-------------------------------------------------------------------------+
 * | This library is free software; you can redistribute it and/or modify    |
 * | it under the terms of the GNU Lesser General Public License as          |
 * | published by the Free Software Foundation; either version 2 of the      |
 * | License, or (at your option) any later version.                         |
 * |                                                                         |
 * | This library is distributed in the hope that it will be useful, but     |
 * | WITHOUT ANY WARRANTY; without even the implied warranty of              |
 * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU        |
 * | Lesser General Public License for more details.                         |
 * |                                                                         |
 * | You should have received a copy of the GNU Lesser General Public        |
 * | License along with this library; if not, write to the Free Software     |
 * | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | 
 * +-------------------------------------------------------------------------+
 */
 
class CCounter {
 
var $name;
 
var $field;
 
var $DataMgr;
 
var $AutoIncrement;
 
/**
 * Class constructor
 *
 * @param object CDataStorage 
 * @param object CXml2Array 
 * @access public
 */
function CCounter(&$RefToDataMgr,$Cfg)
{
$this->DataMgr=&$RefToDataMgr;
if(!is_object($this->DataMgr))
   trigger_error('Internal error: CCounter, first parameter should be an object', E_USER_ERROR);
$this->AutoIncrement=FALSE;
$this->ParseXml($Cfg);
}
/**
* Parse the block tag and its childs and set the intenal structure
*
* @param object CXml2Array 
* @access public
*/
function ParseXml($Cfg)
{
while(($ret=$Cfg->EachAttribute())!=FALSE)
{
   list($AttribName,$value)=$ret;
     switch(strtolower($AttribName))
           {
           case 'name' :
                  $this->name=$value;
                  break;
           case 'field' :
                  $fin=$value;
                  $this->field=$this->_ExtractVar($fin);
                  break;
           case 'autoincrement' :
                  if(strtolower($value)=='y')
                    $this->AutoIncrement=TRUE;
                  break;
 
           }
  }
if($this->name=='')
  trigger_error('Configuration error: counter without attribute name',E_USER_ERROR);
// set the counter to start value
$this->ResetValue();
}
 
function GetName()
{
return($this->name);
}
 
/**
* Parse the text and decode the function or the data field from the given text
*
* @param string Text
* @access private
*/
function _ExtractVar($Text)
{
$OutText="";
if(preg_match("/^(\w+)\(([\$\w\][,\'\" ]+)*\)*/",$Text,$var))
  {
  // Function Type: $var[1] -> Function name
  //                $var[2] -> parameters
  // Is this function defined inside the DataManager class?
  // If so, I prepend $this to the function's name
  if(method_exists($this->DataMgr,$var[1]))
     {
     $OutText.='$this->DataMgr->';
     }
 
  $OutText.=$var[1]."(";
  if(array_key_exists(2,$var))
    {
    $param=explode(",",$var[2]);
    $i=0;
    foreach($param as $value)
       {
       if($i) { $OutText.=",";}
       $OutText.=$this->_ExtractVar($value);
       $i++;
       }
     }
  $OutText.=")";
  }
else
   {
   if(preg_match('/^\$([a-zA-Z0-9]+)((\[[0-9a-zA-Z\'\"]+\])*)*/',$Text,$var))  //'"
     {
     // Variable Type: $var[1] -> Variable name
     //                $var[2] -> squares bracket used by array
     $OutText.='$this->DataMgr->GetEvalValue("'.$var[1].'",$this->DataMgr->Values["'.$var[1].'"]'.$var[2].')';
     }
   else
     $OutText=$Text;
   }
return($OutText);
}
 
 
function ResetValue()
{
$this->DataMgr->SetVar($this->name,0);
}
 
function UpdateValue()
{
$OldValue=$this->DataMgr->GetVar($this->name);
if($this->AutoIncrement)
   $NewValue=$OldValue+1;
else
   eval('$NewValue=$OldValue+'.$this->field.';');
$this->DataMgr->SetVar($this->name,$NewValue);
}
 
 
} // end CCounter class
?>