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<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class EXT_Loader extends CI_Loader {
	
	private $apppath = NULL;
	
	function EXT_Loader()
	{	
		parent::CI_Loader();
		
		$this->apppath = APPPATH;
	}

function model($model, $name = '', $db_conn = FALSE, $apppath = NULL)
	{		
		if (is_array($model))
		{
			foreach($model as $alias => $babe)
			{
				$alias = is_numeric($alias) ? '' : $alias;
				$this->model($babe, $alias);
			}
			return;
		}

if ($model == '')
		{
			return;
		}
	
		// Is the model in a sub-folder? If so, parse out the filename and path.
		if (strpos($model, '/') === FALSE)
		{
			$path = '';
		}
		else
		{
			$x = explode('/', $model);
			$model = end($x);			
			unset($x[count($x)-1]);
			$path = implode('/', $x).'/';
		}
	
		if ($name == '')
		{
			$name = $model;
		}
		
		if (in_array($name, $this->_ci_models, TRUE))
		{
			return;
		}
		
		$CI =& get_instance();
		if (isset($CI->$name))
		{
			show_error('The model name you are loading is the name of a resource that is already being used: '.$name);
		}
	
		$model = strtolower($model);
		
		/* added line for dynamic app path */
		if($apppath !== NULL){
			$this->apppath = $apppath;
		}
		
		// changed var below for dynamic app path
		if ( ! file_exists($this->apppath.'models/'.$path.$model.EXT))
		{
			show_error('Unable to locate the model you have specified: '.$model);
		}
				
		if ($db_conn !== FALSE AND ! class_exists('CI_DB'))
		{
			if ($db_conn === TRUE)
				$db_conn = '';
		
			$CI->load->database($db_conn, FALSE, TRUE);
		}
	
		if ( ! class_exists('Model'))
		{
			load_class('Model', FALSE);
		}

require_once($this->apppath.'models/'.$path.$model.EXT);

$model = ucfirst($model);
				
		$CI->$name = new $model();
		$CI->$name->_assign_libraries();
		
		$this->_ci_models[] = $name;	
	}
	
	
	function library($library = '', $params = NULL, $object_name = NULL, $apppath = NULL)
	{
		if ($library == '')
		{
			return FALSE;
		}

if ( ! is_null($params) AND ! is_array($params))
		{
			$params = NULL;
		}
		
		if($apppath !== NULL){
			$this->apppath = $apppath;
		}

if (is_array($library))
		{
			foreach ($library as $class)
			{
				$this->_ci_load_class($class, $params, $object_name);
			}
		}
		else
		{
			$this->_ci_load_class($library, $params, $object_name);
		}
		
		$this->_ci_assign_to_models();
	}
	
	
	function _ci_load_class($class, $params = NULL, $object_name = NULL)
	{	
		// Get the class name, and while we're at it trim any slashes.  
		// The directory path can be included as part of the class name, 
		// but we don't want a leading slash
		$class = str_replace(EXT, '', trim($class, '/'));
	
		// Was the path included with the class name?
		// We look for a slash to determine this
		$subdir = '';
		if (strpos($class, '/') !== FALSE)
		{
			// explode the path so we can separate the filename from the path
			$x = explode('/', $class);	
			
			// Reset the $class variable now that we know the actual filename
			$class = end($x);
			
			// Kill the filename from the array
			unset($x[count($x)-1]);
			
			// Glue the path back together, sans filename
			$subdir = implode($x, '/').'/';
		}
		
		// We'll test for both lowercase and capitalized versions of the file name
		foreach (array(ucfirst($class), strtolower($class)) as $class)
		{
			
			$subclass = $this->apppath.'libraries/'.$subdir.config_item('subclass_prefix').$class.EXT;

// Is this a class extension request?			
			if (file_exists($subclass))
			{
				$baseclass = BASEPATH.'libraries/'.ucfirst($class).EXT;
				
				if ( ! file_exists($baseclass))
				{
					log_message('error', "Unable to load the requested class: ".$class);
					show_error("Unable to load the requested class: ".$class);
				}

// Safety:  Was the class already loaded by a previous call?
				if (in_array($subclass, $this->_ci_loaded_files))
				{
					// Before we deem this to be a duplicate request, let's see
					// if a custom object name is being supplied.  If so, we'll
					// return a new instance of the object
					if ( ! is_null($object_name))
					{
						$CI =& get_instance();
						if ( ! isset($CI->$object_name))
						{
							return $this->_ci_init_class($class, config_item('subclass_prefix'), $params, $object_name);			
						}
					}
					
					$is_duplicate = TRUE;
					log_message('debug', $class." class already loaded. Second attempt ignored.");
					return;
				}
	
				include_once($baseclass);				
				include_once($subclass);
				$this->_ci_loaded_files[] = $subclass;
	
				return $this->_ci_init_class($class, config_item('subclass_prefix'), $params, $object_name);			
			}
		
			// Lets search for the requested library file and load it.
			$is_duplicate = FALSE;		
			for ($i = 1; $i < 3; $i++)
			{
				$path = ($i % 2) ? $this->apppath : BASEPATH;	
				$filepath = $path.'libraries/'.$subdir.$class.EXT;
				
				// Does the file exist?  No?  Bummer...
				if ( ! file_exists($filepath))
				{
					continue;
				}
				
				// Safety:  Was the class already loaded by a previous call?
				if (in_array($filepath, $this->_ci_loaded_files))
				{
					// Before we deem this to be a duplicate request, let's see
					// if a custom object name is being supplied.  If so, we'll
					// return a new instance of the object
					if ( ! is_null($object_name))
					{
						$CI =& get_instance();
						if ( ! isset($CI->$object_name))
						{
							return $this->_ci_init_class($class, '', $params, $object_name);
						}
					}
				
					$is_duplicate = TRUE;
					log_message('debug', $class." class already loaded. Second attempt ignored.");
					return;
				}
				
				include_once($filepath);
				$this->_ci_loaded_files[] = $filepath;
				return $this->_ci_init_class($class, '', $params, $object_name);
			}
		} // END FOREACH

// One last attempt.  Maybe the library is in a subdirectory, but it wasn't specified?
		if ($subdir == '')
		{
			$path = strtolower($class).'/'.$class;
			return $this->_ci_load_class($path, $params);
		}
		
		// If we got this far we were unable to find the requested class.
		// We do not issue errors if the load call failed due to a duplicate request
		if ($is_duplicate == FALSE)
		{
			log_message('error', "Unable to load the requested class: ".$class);
			show_error("Unable to load the requested class: ".$class);
		}
	}
	
	
	function _ci_init_class($class, $prefix = '', $config = FALSE, $object_name = NULL)
	{	
		// Is there an associated config file for this class?
		if ($config === NULL)
		{
			// We test for both uppercase and lowercase, for servers that
			// are case-sensitive with regard to file names
			if (file_exists($this->apppath.'config/'.strtolower($class).EXT))
			{
				include_once($this->apppath.'config/'.strtolower($class).EXT);
			}			
			elseif (file_exists($this->apppath.'config/'.ucfirst(strtolower($class)).EXT))
			{
				include_once($this->apppath.'config/'.ucfirst(strtolower($class)).EXT);
			}
		}
		
		if ($prefix == '')
		{			
			if (class_exists('CI_'.$class)) 
			{
				$name = 'CI_'.$class;
			}
			elseif (class_exists(config_item('subclass_prefix').$class)) 
			{
				$name = config_item('subclass_prefix').$class;
			}
			else
			{
				$name = $class;
			}
		}
		else
		{
			$name = $prefix.$class;
		}
		
		// Is the class name valid?
		if ( ! class_exists($name))
		{
			log_message('error', "Non-existent class: ".$name);
			show_error("Non-existent class: ".$class);
		}
		
		// Set the variable name we will assign the class to
		// Was a custom class name supplied?  If so we'll use it
		$class = strtolower($class);
		
		if (is_null($object_name))
		{
			$classvar = ( ! isset($this->_ci_varmap[$class])) ? $class : $this->_ci_varmap[$class];
		}
		else
		{
			$classvar = $object_name;
		}

// Save the class name and object name		
		$this->_ci_classes[$class] = $classvar;

// Instantiate the class		
		$CI =& get_instance();
		if ($config !== NULL)
		{
			$CI->$classvar = new $name($config);
		}
		else
		{
			$CI->$classvar = new $name;
		}
	}
	
	
	function _ci_autoloader()
	{	
		include_once(APPPATH.'config/autoload'.EXT);
		
		if ( ! isset($autoload))
		{
			return FALSE;
		}
		
		// Load any custom config file
		if (count($autoload['config']) > 0)
		{			
			$CI =& get_instance();
			foreach ($autoload['config'] as $key => $val)
			{
				$CI->config->load($val);
			}
		}

// Autoload plugins, helpers and languages
		foreach (array('helper', 'plugin', 'language') as $type)
		{			
			if (isset($autoload[$type]) AND count($autoload[$type]) > 0)
			{
				$this->$type($autoload[$type]);
			}		
		}

// A little tweak to remain backward compatible
		// The $autoload['core'] item was deprecated
		if ( ! isset($autoload['libraries']))
		{
			$autoload['libraries'] = $autoload['core'];
		}
		
		// Load libraries
		if (isset($autoload['libraries']) AND count($autoload['libraries']) > 0)
		{
			// Load the database driver.
			if (in_array('database', $autoload['libraries']))
			{
				$this->database();
				$autoload['libraries'] = array_diff($autoload['libraries'], array('database'));
			}

// Load scaffolding
			if (in_array('scaffolding', $autoload['libraries']))
			{
				$this->scaffolding();
				$autoload['libraries'] = array_diff($autoload['libraries'], array('scaffolding'));
			}
		
			// Load all other libraries
			foreach ($autoload['libraries'] as $alias => $item)
			{
				$alias = is_numeric($alias) ? NULL : $alias;
				$this->library($item, NULL, $alias);
			}
		}

// Autoload models
		if (isset($autoload['model']))
		{
			$this->model($autoload['model']);
		}

}
}

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