From 3ecf2c643ef2189d26a42b34209ed3dd4a6bccf3 Mon Sep 17 00:00:00 2001
From: Robert Sesek <rsesek@bluestatic.org>
Date: Tue, 15 Aug 2006 23:53:29 +0000
Subject: [PATCH] Adding Loader module

---
 Loader.php | 186 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 186 insertions(+)
 create mode 100644 Loader.php

diff --git a/Loader.php b/Loader.php
new file mode 100644
index 0000000..6b16b36
--- /dev/null
+++ b/Loader.php
@@ -0,0 +1,186 @@
+<?php
+/*=====================================================================*\
+|| ###################################################################
+|| # Blue Static ISSO Framework [#]issoversion[#]
+|| # Copyright ©2002-[#]year[#] Blue Static
+|| #
+|| # 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; version [#]gpl[#] of the License.
+|| #
+|| # 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.,
+|| # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+|| ###################################################################
+\*=====================================================================*/
+
+/**
+* System loader (Loader.php)
+*
+* @package	ISSO
+*/
+
+/**
+* System Loader
+*
+* This class contains static methods that are used to create new registers and
+* load modules.
+*
+* @author		Blue Static
+* @copyright	Copyright ©2002 - [#]year[#], Blue Static
+* @version		$Revision$
+* @package		ISSO
+* 
+*/
+class BSLoader
+{
+	/**
+	* Singleton instance
+	* @var	object
+	*/
+	private $instance;
+	
+	/**
+	* Array of all the registers
+	* @var	array
+	*/
+	private $registers = array();
+	
+	/**
+	* The main register
+	* @var	object
+	*/
+	private $main;
+	
+	// ###################################################################
+	/**
+	* Constructor
+	*/
+	private function __construct() {}
+	
+	// ###################################################################
+	/**
+	* Returns the shared instance of the BSLoader singleton class.
+	*
+	* @return	object	The BSLoader shared instance
+	*/
+	private function SharedInstance()
+	{
+		if (!$this->instance)
+		{
+			$this->instance = self::__construct();
+		}
+		return $this->instance;
+	}
+	
+	// ###################################################################
+	/**
+	* Creates a new BSRegister instance and returns it.
+	*
+	* @return	object	New register
+	*/
+	public static function NewRegister()
+	{
+		require_once('ISSO/Register.php');
+		
+		self::SharedInstance()->registers[] = new BSRegister();
+		
+		return end(self::SharedInstance()->registers);
+	}
+	
+	// ###################################################################
+	/**
+	* Returns the array of all the registers
+	*
+	* @return	array	The array of all the registers
+	*/
+	public static function GetAllRegisters()
+	{	
+		return self::SharedInstance()->registers;
+	}
+	
+	// ###################################################################
+	/**
+	* Sets the main register
+	*
+	* @param	object	New main register
+	*/
+	public static function SetRegister(BSRegister $newreg)
+	{
+		if (get_class($newreg) != 'BSRegister')
+		{
+			trigger_error('BSLoader::SetRegister() was not passed a BSRegister object', E_USER_ERROR);
+		}
+		
+		self::SharedInstance()->main = $register;
+	}
+	
+	// ###################################################################
+	/**
+	* Gets the main register if no argument is passed, or an arbitrary
+	* one if the index of a register is passed.
+	*
+	* @param	integer	Register index
+	*
+	* @return	object	Specified register
+	*/
+	public static function &GetRegister($index = null)
+	{
+		if (is_null($index))
+		{
+			if (!isset(self::SharedInstance()->main))
+			{
+				trigger_error('Cannot fetch the main register because it has not been set with BSLoader::SetRegister()', E_USER_ERROR);
+			}
+			return self::SharedInstance()->main;
+		}
+		else
+		{
+			if (!isset(self::SharedInstance()->registers["$index"]))
+			{
+				trigger_error('Invalid register index passed to BSLoader::GetRegister()', E_USER_ERROR);
+			}
+			return self::SharedInstance()->registers["$index"];
+		}
+	}
+	
+	// ###################################################################
+	/**
+	* Loads the specified module.
+	*
+	* @param	string	Module name
+	*
+	* @return	object	Instantiated module
+	*/
+	public static function LoadModule($name)
+	{
+		if (!file_exists("ISSO/$name.php"))
+		{
+			trigger_error('Specified module does not exist', E_USER_ERROR);
+		}
+		
+		require_once("ISSO/$name.php");
+		
+		$class = "BS$name";
+		
+		if (!class_exists($class))
+		{
+			trigger_error('Specifed module does not conform to the ISSO specification, or the class is missing', E_USER_ERROR);
+		}
+		
+		return new $class;
+	}
+}
+
+/*=====================================================================*\
+|| ###################################################################
+|| # $HeadURL$
+|| # $Id$
+|| ###################################################################
+\*=====================================================================*/
+?>
\ No newline at end of file
-- 
2.22.5