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<?php
# CMS - CMS Made Simple
# (c)2004-6 by Ted Kulp (ted@cmsmadesimple.org)
# This project's homepage is: http://cmsmadesimple.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.
#
# 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 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
#
#$Id$

/**
 * Class to load modules
 *
 * @since		1.0
 * @package		CMS
 */

require_once(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'class.module.inc.php');

class ModuleLoader
{
	/**
	* Loads modules from the filesystem.  If loadall is true, then it will load all
	* modules whether they're installed, or active.  If it is false, then it will
	* only load modules which are installed and active.
	*/
	function LoadModules($loadall = false, $noadmin = false)
	{ 
		global $gCms,$CMS_VERSION;
		$db =& $gCms->GetDb();
		$cmsmodules = &$gCms->modules;

		$dir = dirname(dirname(dirname(__FILE__))).DIRECTORY_SEPARATOR."modules";
    $files=array();
    if (function_exists('scandir'))       // PHP 5 only  quick scan
      $files=scandir($dir);
    else
    {

      $handle = opendir($dir);
      while ( false !== ( $file = readdir($handle) ) ) $files[]=$file;
      closedir($handle);
    }  
    $allfiles=array();
    foreach ($files as $one)
      if ($one<>'.' and $one<>'..')
        if (@is_file("$dir/$one/$one.module.php"))
				  $allfiles[$one]="$dir/$one/$one.module.php";
		
    if ($loadall == true)
		{				 
      foreach ($allfiles as $key => $one)    
      {                      
					  include_once("$one");
					  if (class_exists($key))
					  {
              $newmodule =& new $key;
					    $name = $newmodule->GetName();
					    $cmsmodules[$name]['object'] =& $newmodule;
					    $cmsmodules[$name]['installed'] = false;
					    $cmsmodules[$name]['active'] = false;
				    }
				    else
					     unset($cmsmodules[$name]);
            
			}		  
		}
    
		#Figger out what modules are active and/or installed
		#Load them if loadall is false
		if (isset($db))
		{
			$query = '';
			if ($noadmin)
			$query = "SELECT * FROM ".cms_db_prefix()."modules WHERE admin_only = 0 and active = 1 and module_name <>'' ORDER BY module_name";
			else
			$query = "SELECT * FROM ".cms_db_prefix()."modules WHERE  module_name <>'' ORDER BY module_name";
			$result = &$db->Execute($query);
			while ($result && !$result->EOF)
			{								
					$modulename = $result->fields['module_name'];
										
						if ($loadall == true)
						{
							if (isset($cmsmodules[$modulename]))
							{
								$cmsmodules[$modulename]['installed'] = true;
								$cmsmodules[$modulename]['active'] = ($result->fields['active'] == 1?true:false);
							}
						}
						else
						{ 
							if ($result->fields['active'] == 1)
							{
								if (@isset($allfiles[$modulename]))
								{
									include_once($allfiles[$modulename]);
									$unsetit=true;
									if (class_exists($modulename))
									{ $unsetit=false; 
										$newmodule =& new $modulename;
										$name = $newmodule->GetName();
										$dbversion = $result->fields['version'];
										#Check to see if there is an update and wether or not we should perform it
										if (version_compare($dbversion, $newmodule->GetVersion()) == -1 && $newmodule->AllowAutoUpgrade() == TRUE)
										{
											$newmodule->Upgrade($dbversion, $newmodule->GetVersion());
											$query = "UPDATE ".cms_db_prefix()."modules SET version = ? WHERE module_name = ?";
											$db->Execute($query, array($newmodule->GetVersion(), $name));
											Events::SendEvent('Core', 'ModuleUpgraded', array('name' => $name, 'oldversion' => $dbversion, 'newversion' => $newmodule->GetVersion()));
											$dbversion = $newmodule->GetVersion();
										}

										#Check to see if version in db matches file version
										if ($dbversion == $newmodule->GetVersion() && version_compare($newmodule->MinimumCMSVersion(), $CMS_VERSION) != 1)
										{
											$cmsmodules[$name]['object'] =& $newmodule;
											$cmsmodules[$name]['installed'] = true;
											$cmsmodules[$name]['active'] = ($result->fields['active'] == 1?true:false);											
										}
										else
											$unsetit=true;
									}
									else //No point in doing anything with it
										$unsetit=true;
								}
								else
									$unsetit=true;
							}
							if ($unsetit) unset($cmsmodules[$modulename]);
						}
					
					$result->MoveNext();
				
			}
			
			if ($result) $result->Close();
		}
	}


}

?>