<?php

class Models {
	
	public static $ci;
	protected static $prefix = '';
	protected static $suffix = 'model';
	
	public static function load($model)
	{
		$model_name = self::$prefix.$model.self::$suffix;
		self::$ci->load->model($model_name);
	}
	
	public static function get($model)
	{
		$model_name = self::$prefix.$model.self::$suffix;
		
		if(!is_object(self::$ci->$model_name)) {
			self::load($model);
		}
		
		return self::$ci->$model_name;
	}

}

class Libs {
	
	public static $ci;
	protected static $prefix = '';
	protected static $suffix = '';
	
	public static function load($lib)
	{
		$lib_name = self::$prefix.$lib.self::$suffix;
		self::$ci->load->library($lib_name);
	}
	
	public static function get($lib)
	{
		$lib_name = self::$prefix.$lib.self::$suffix;
		
		if(!is_object(self::$ci->$lib_name)) {
			self::load($lib);
		}
		
		return self::$ci->$lib_name;
	}

}

class Views {
	
	public static $ci;
	
	public static function show($view, $data = array())
	{
		self::$ci->load->view($view, $data);
	}
	
	public static function parse($view, $data)
	{
		return self::$ci->load->view($view, $data, TRUE);
	}
	
}

class DB {
	
	public static $ci;
	
	protected static $handles = array();
	protected static $default;
	protected static $last;
	
	public static function load($db = NULL, $default = FALSE)
	{
		if($db === NULL) {
			include(APPPATH.'config/database'.EXT);
			$db = $active_group;
		}
		
		self::$handles[$db] = self::$ci->load->database($db, TRUE);
		
		if($default || !self::$default) {
			self::$default = $db;
		}
	}
	
	public static function conn($db = NULL)
	{
		if($db === NULL) {
			
			if(!self::$default) {
				self::load(NULL, TRUE);
			}
			
			return self::$handles[self::$default];
		}
		
		if(!isset(self::$handles[$db])) {
			self::load($db);
		}

		return self::$handles[$db];
	}

}


# initialize the static classes

Models::$ci =& get_instance();
Views::$ci  =& get_instance();
Libs::$ci   =& get_instance();
DB::$ci     =& get_instance();
DB::load(NULL, TRUE);	// load the default database


# shortcut functions

function Model($model) {
	return Models::get($model);
}

function Library($lib) {
	return Libs::get($lib);
}

function Database($db = NULL) {
	return DB::conn($db);
}