<?php
/**
 * class.Sessions.php
 *  
 * ProcessMaker Open Source Edition
 * Copyright (C) 2004 - 2008 Colosa Inc.23
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * For more information, contact Colosa Inc, 2566 Le Jeune Rd., 
 * Coral Gables, FL, 33134, USA, or email info@colosa.com.
 * 
 */
require_once 'classes/model/Session.php';
/**
 * Sessions - Sessions class
 * @package ProcessMaker
 * @author Everth S. Berrios Morales
 * @copyright 2008 COLOSA
 */

class Sessions {
  
  protected $tmpfile;
  private   $sessionId;
  private   $globals;
  
  /** 
  * This function is the constructor of the Sessions class 
  * @param string $sSessionId
  * @return void
  */
  public function __construct($sSessionId=NULL){
    $this->sessionId = $sSessionId;
  }
  
  /** 
  * This function gets the user session
  *
  * 
  * @name getSessionUser
  *
  * @param string sSessionId
  * @return array
  */ 
  public function getSessionUser($sSessionId=NULL) 
  {
   try 
   {           
    if($sSessionId != NULL){
      $this->sessionId = $sSessionId;
    } else if($this->sessionId == NULL){
      throw new Exception('session id was not set.'); 
    }
    
    $oCriteria = new Criteria('workflow');
    $oCriteria->addSelectColumn(SessionPeer::USR_UID);      
    $oCriteria->addSelectColumn(SessionPeer::SES_STATUS); 
    $oCriteria->addSelectColumn(SessionPeer::SES_DUE_DATE); 
    $oCriteria->add(SessionPeer::SES_UID,  $this->sessionId);                     
    
    $oDataset = SessionPeer::doSelectRS($oCriteria);
    $oDataset->setFetchmode(ResultSet::FETCHMODE_ASSOC);
    $oDataset->next();
    $aRow = $oDataset->getRow();
    
    if( !is_array($aRow) ){
      $this->deleteTmpfile();
    }
      return $aRow;
    }
    catch (Exception $oError) {
      throw($oError);
    }
  }
  
  /** 
  * This function checks the user session
  *
  * 
  * @name verifySession
  *
  * @param string sSessionId
  * @return array
  */ 
  public function verifySession($sSessionId=NULL) 
  {
   try 
   {
     if($sSessionId != NULL){
       $this->sessionId = $sSessionId;
     } else if($this->sessionId == NULL){
       throw new Exception('session id was not set.'); 
     }
     
     $date=date('Y-m-d H:i:s');
     $oCriteria = new Criteria('workflow');
     $oCriteria->addSelectColumn(SessionPeer::USR_UID);      
     $oCriteria->addSelectColumn(SessionPeer::SES_STATUS); 
     $oCriteria->addSelectColumn(SessionPeer::SES_DUE_DATE); 
     $oCriteria->add(SessionPeer::SES_UID,  $this->sessionId);                     
     $oCriteria->add(SessionPeer::SES_STATUS, 'ACTIVE');                     
     $oCriteria->add(SessionPeer::SES_DUE_DATE,  $date, Criteria::GREATER_EQUAL);                     
     
     $oDataset = SessionPeer::doSelectRS($oCriteria);
     $oDataset->setFetchmode(ResultSet::FETCHMODE_ASSOC);
     $oDataset->next();
     $aRow = $oDataset->getRow();

     if( !is_array($aRow) ){
       $this->deleteTmpfile();
     }
     
     return $aRow;
   }
   catch (Exception $oError) {
     throw($oError);
   }
  }
  
  /** 
  * This function registers into globals variables
  *
  * 
  * @name registerGlobal
  *
  * @param string $name
  * @param string $value
  * @return void
  */ 
  public function registerGlobal($name, $value)
  {
   $this->tmpfile = G::getSysTemDir() . PATH_SEP . "pm-rg-{$this->sessionId}";  
   
   if($this->sessionId == NULL){
       throw new Exception('session id was not set.'); 
   }
   
   $tmpfile_content = '';
   if( is_file($this->tmpfile) && trim(file_get_contents($this->tmpfile)) != '' ) {
     $tmpfile_content = file_get_contents($this->tmpfile);
   }
   
   //getting the global array
   if( $tmpfile_content != ''){
     $this->globals = unserialize($tmpfile_content);
   } else {
     $this->globals = Array();
   }
   
   //registering the new global variable
   $this->globals[$name] = $value;
   
   //saving the global array
   $tmpfile_content = serialize($this->globals);
   file_put_contents($this->tmpfile, $tmpfile_content);
             
  }
  
  /** 
  * This function gets a global variable
  *
  * 
  * @name getGlobal
  *
  * @param string $name
  * @return string
  */
  public function getGlobal($name)
  {
   $this->tmpfile = G::getSysTemDir() . PATH_SEP . "pm-rg-{$this->sessionId}";  
   
   if($this->sessionId == NULL){
       throw new Exception('session id was not set.'); 
   }
   
   $tmpfile_content = '';
   if( is_file($this->tmpfile) && trim(file_get_contents($this->tmpfile)) != '' ) {
     $tmpfile_content = file_get_contents($this->tmpfile);
   }
   
   //getting the global array
   if( $tmpfile_content != ''){
     $this->globals = unserialize($tmpfile_content);
   } else {
     $this->globals = Array();
   }
   
   //getting the new global variable
   if( isset($this->globals[$name]) ){
     return $this->globals[$name];
   } else {
     return '';
   } 
  }
  
  /** 
  * This function gets all globals variables
  *
  * 
  * @name getGlobals
  *
  * @param string $name
  * @return array
  */
  public function getGlobals()
  {
   $this->tmpfile = G::getSysTemDir() . PATH_SEP . "pm-rg-{$this->sessionId}";  
   
   if($this->sessionId == NULL){
       throw new Exception('session id was not set.'); 
   }
   
   $tmpfile_content = '';
   if( is_file($this->tmpfile) && trim(file_get_contents($this->tmpfile)) != '' ) {
     $tmpfile_content = file_get_contents($this->tmpfile);
   }
   
   //getting the global array
   if( $tmpfile_content != ''){
     $this->globals = unserialize($tmpfile_content);
   } else {
     $this->globals = Array();
   }
   return $this->globals;
  }
  
  /** 
  * This function removes a temporal file
  *
  * 
  * @name deleteTmpfile
  *
  * @param 
  * @return void
  */
  private function deleteTmpfile(){
    if($this->sessionId == NULL){
      throw new Exception('session id was not set.'); 
    }
    $this->tmpfile = G::getSysTemDir() . PATH_SEP . "pm-rg-{$this->sessionId}";
    @unlink($this->tmpfile);
  }
  
}