<?php
///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  Helpzilla: Got Help? (tm)                                                //
//                                                                           //
//  Copyright (c) 2003 Jason Dillon.  All rights reserved.                   //
//                                                                           //
//  This file is part of Helpzilla.                                          //
//                                                                           //
//  Helpzilla 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.                                      //
//                                                                           //
//  Helpzilla 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 General Public License for more details.                             //
//                                                                           //
//  You should have received a copy of the GNU General Public License        //
//  along with this program; if not, write to the Free Software              //
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA  //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

//
//  Version: $Id: helpzilla-util.inc.php,v 1.13 2003/04/06 08:38:46 user57 Exp $
//
//  Author: Jason Dillon <hide@address.com>
//

require_once('common.inc.php');

define('UNDEFINED', '<_UNDEFINED_>');

class Object
{
   var $log;
   
   function Object() 
   {
      // setup logging
      $this->log =& LoggerManager::getLogger($this->getLoggerName());
      
      // call user constructor
      $args = func_get_args();
      call_user_func_array(array(&$this, '__constructor'), &$args);
   }

   function __constructor() 
   {
      // nothing
   }
   
   function __sleep()
   {
      // Do not serialize our logger
      $fields = get_object_vars($this);
      unset($fields['log']);
      return array_keys($fields);
   }
   
   function __wakeup()
   {
      // re-attach logging
      $this->log =& LoggerManager::getLogger($this->getLoggerName());
   }
   
   function getLoggerName()
   {
      return get_class($this);
   }
   
   function getLoggerPathName()
   {
      $name = null;
      $classname = get_class($this);
      $ancestors = get_ancestors_class($classname);
      if ($ancestors != null) {
         $c = count($ancestors);
         if ($c >= 1) {
            $name = $ancestors[$c-1];
         }
      }
      
      if ($name != null) {
         $name .= '.' . $classname;
      }
      else {
         $name = $classname;
      }
      
      return $name;
   }
}
 
define('HTTP_MOVED_PERMANENTLY', '301 Moved Permanently');
define('HTTP_FOUND',             '302 Found');
define('HTTP_SERVER_ERROR',      '500 Internal Server Error');

class HTTP
{
   function MakeURL($uri)
   {
      $url = null;
      
      if (!preg_match( "/^http.*/", $uri)) {
         $url = (isset($_SERVER['HTTPS']) ? 'https://' : 'http://') . $_SERVER['SERVER_NAME'];
         
         if (substr($uri, 0, 1) != '/') {
            $tmp = split('/', $_SERVER["SCRIPT_NAME"]);
            array_pop($tmp);
            $current_dir = implode('/', $tmp);
            $uri = $current_dir . '/' . $uri;
         }
         
         $url .= $uri;
      }
   
      return $url == null ? $uri : $url;
   }
   
   function Redirect($uri, $status=HTTP_FOUND)
   {
      header($_SERVER['SERVER_PROTOCOL'] . " " . $status, true);
   
      // TODO: Should set Status: ?
   
      $url = HTTP::MakeURL($uri);
      header("Location: $url", true);
      exit();
   }
   
   function RedirectWithQuery($uri, $sep='?', $status=HTTP_FOUND)
   {
      $url = HTTP::MakeURL($uri);
      
      if (isset($_SERVER['QUERY_STRING']) && $_SERVER['QUERY_STRING'] != "") {
         $url .= $sep . $_SERVER['QUERY_STRING'];
      }
      
      HTTP::Redirect($url, $status);
   }
}

class HTTPObject
   extends Object
{
   function register() // ...
   {
      $args = func_get_args();
      
      foreach ($args as $name) {
         $GLOBALS[$name] = $this->get($name);
      }
   }
   
   function contains() // ...
   {
      $args = func_get_args();
      
      foreach ($args as $name) {
         if ($this->get($name, null) == null) {
            return false;
         }
      }
      
      return true;
   }
}

class HTTPSession
   extends HTTPObject
{
   function __constructor()
   {
      if (!isset($_SESSION)) {
         error('Session not started');
      }
   }
   
   function &get($name)
   {
      if (isset($_SESSION[$name])) {
         return $_SESSION[$name];
      }
      
      $args = func_get_args();
      array_shift($args);
      
      if (count($args) == 0) {
         error('Missing required session parameter: ' . $name);
      }
      
      return $args[0];
   }
   
   function put($name, &$obj)
   {
      $prev = null;
      if (isset($_SESSION[$name])) {
         $prev =& $_SESSION[$name];
      }
      
      $_SESSION[$name] =& $obj;
      
      return $prev;
   }
   
   function &Create($start=true) // Static
   {
      if (isset($GLOBALS['hz_http_session'])) {
         return $GLOBALS['hz_http_session'];
      }
      
      if ($start && !isset($_SESSION)) {
         session_start();
      }
      
      $session =& new HTTPSession();
      $GLOBALS['hz_http_session'] =& $session;
      
      return $session;
   }
}

class HTTPRequest
   extends HTTPObject
{
   var $method;
   
   function __constructor()
   {
      global $REQUEST_METHOD;
      
      //
      // TODO: use this to determine which array to use
      //
      $this->method = $REQUEST_METHOD;
   }
   
   function &get($name)
   {
      if (isset($_POST[$name])) {
         return $_POST[$name];
      }
      elseif (isset($_GET[$name])) {
         return $_GET[$name];
      }
      
      $args = func_get_args();
      array_shift($args);
      
      if (count($args) == 0) {
         error('Missing required request parameter: ' . $name);
      }
      
      return $args[0];
   }
   
   function &Create() // Static
   {
      if (isset($GLOBALS['hz_http_request'])) {
         return $GLOBALS['hz_http_request'];
      }
      
      $req =& new HTTPRequest();
      $GLOBALS['hz_http_request'] =& $req;
      
      return $req;
   }
}

class PageBuffer
{
   function IsEnabled()
   {
      global $hz_config;
      return $hz_config['pagebuffer']['enabled'];
   }
   
   function Begin()
   {
      if (PageBuffer::IsEnabled()) {
         // Turn on the output buffer
         ob_start(); // ob_start("ob_gzhandler");
      }
   }
   
   function End()
   {
      if (PageBuffer::IsEnabled()) {
         // Set the content length and end the output buffer
         header('Content-Length: ' . ob_get_length(), true);
         ob_end_flush();
      }
   }
}

function include_script($url, $lang='javascript', $type='text/javascript')
{
   $url = HTTP::MakeURL($url);
   ?><script language="<?= $lang ?>" type="<?= $type ?>" src="<?= $url ?>"></script>
<?
}

function svar_dump($data) 
{
   ob_start();
   
   var_dump($data);
   $ret_val = ob_get_contents();
   
   ob_end_clean();
   
   return $ret_val;
}

function get_ancestors_class($classname) 
{
   $ancestors = null;
   $parent = get_parent_class($classname);
   if ($parent != "") {
      $ancestors = get_ancestors_class($parent);
      $ancestors[] = $parent;
   }
   
   return $ancestors;
}

?>