Subversion-Projekte lars-tiefland.ci

<?php

/**

 * CodeIgniter

 *

 * An open source application development framework for PHP

 *

 * This content is released under the MIT License (MIT)

 *

 * Copyright (c) 2014 - 2018, British Columbia Institute of Technology

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 *

 * @package	CodeIgniter

 * @author	EllisLab Dev Team

 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)

 * @copyright	Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/)

 * @license	http://opensource.org/licenses/MIT	MIT License

 * @link	https://codeigniter.com

 * @since	Version 1.0.0

 * @filesource

 */

defined('BASEPATH') OR exit('No direct script access allowed');

/**

 * CodeIgniter Driver Library Class

 *

 * This class enables you to create "Driver" libraries that add runtime ability

 * to extend the capabilities of a class via additional driver objects

 *

 * @package		CodeIgniter

 * @subpackage	Libraries

 * @category	Libraries

 * @author		EllisLab Dev Team

 * @link

 */

class CI_Driver_Library {

	/**

	 * Array of drivers that are available to use with the driver class

	 *

	 * @var array

	 */

	protected $valid_drivers = array();

	/**

	 * Name of the current class - usually the driver class

	 *

	 * @var string

	 */

	protected $lib_name;

	/**

	 * Get magic method

	 *

	 * The first time a child is used it won't exist, so we instantiate it

	 * subsequents calls will go straight to the proper child.

	 *

	 * @param	string	Child class name

	 * @return	object	Child class

	 */

	public function __get($child)

	{

		// Try to load the driver

		return $this->load_driver($child);

	}

	/**

	 * Load driver

	 *

	 * Separate load_driver call to support explicit driver load by library or user

	 *

	 * @param	string	Driver name (w/o parent prefix)

	 * @return	object	Child class

	 */

	public function load_driver($child)

	{

		// Get CodeIgniter instance and subclass prefix

		$prefix = config_item('subclass_prefix');

		if ( ! isset($this->lib_name))

		{

			// Get library name without any prefix

			$this->lib_name = str_replace(array('CI_', $prefix), '', get_class($this));

		}

		// The child will be prefixed with the parent lib

		$child_name = $this->lib_name.'_'.$child;

		// See if requested child is a valid driver

		if ( ! in_array($child, $this->valid_drivers))

		{

			// The requested driver isn't valid!

			$msg = 'Invalid driver requested: '.$child_name;

			log_message('error', $msg);

			show_error($msg);

		}

		// Get package paths and filename case variations to search

		$CI = get_instance();

		$paths = $CI->load->get_package_paths(TRUE);

		// Is there an extension?

		$class_name = $prefix.$child_name;

		$found = class_exists($class_name, FALSE);

		if ( ! $found)

		{

			// Check for subclass file

			foreach ($paths as $path)

			{

				// Does the file exist?

				$file = $path.'libraries/'.$this->lib_name.'/drivers/'.$prefix.$child_name.'.php';

				if (file_exists($file))

				{

					// Yes - require base class from BASEPATH

					$basepath = BASEPATH.'libraries/'.$this->lib_name.'/drivers/'.$child_name.'.php';

					if ( ! file_exists($basepath))

					{

						$msg = 'Unable to load the requested class: CI_'.$child_name;

						log_message('error', $msg);

						show_error($msg);

					}

					// Include both sources and mark found

					include_once($basepath);

					include_once($file);

					$found = TRUE;

					break;

				}

			}

		}

		// Do we need to search for the class?

		if ( ! $found)

		{

			// Use standard class name

			$class_name = 'CI_'.$child_name;

			if ( ! class_exists($class_name, FALSE))

			{

				// Check package paths

				foreach ($paths as $path)

				{

					// Does the file exist?

					$file = $path.'libraries/'.$this->lib_name.'/drivers/'.$child_name.'.php';

					if (file_exists($file))

					{

						// Include source

						include_once($file);

						break;

					}

				}

			}

		}

		// Did we finally find the class?

		if ( ! class_exists($class_name, FALSE))

		{

			if (class_exists($child_name, FALSE))

			{

				$class_name = $child_name;

			}

			else

			{

				$msg = 'Unable to load the requested driver: '.$class_name;

				log_message('error', $msg);

				show_error($msg);

			}

		}

		// Instantiate, decorate and add child

		$obj = new $class_name();

		$obj->decorate($this);

		$this->$child = $obj;

		return $this->$child;

	}

}

// --------------------------------------------------------------------------

/**

 * CodeIgniter Driver Class

 *

 * This class enables you to create drivers for a Library based on the Driver Library.

 * It handles the drivers' access to the parent library

 *

 * @package		CodeIgniter

 * @subpackage	Libraries

 * @category	Libraries

 * @author		EllisLab Dev Team

 * @link

 */

class CI_Driver {

	/**

	 * Instance of the parent class

	 *

	 * @var object

	 */

	protected $_parent;

	/**

	 * List of methods in the parent class

	 *

	 * @var array

	 */

	protected $_methods = array();

	/**

	 * List of properties in the parent class

	 *

	 * @var array

	 */

	protected $_properties = array();

	/**

	 * Array of methods and properties for the parent class(es)

	 *

	 * @static

	 * @var	array

	 */

	protected static $_reflections = array();

	/**

	 * Decorate

	 *

	 * Decorates the child with the parent driver lib's methods and properties

	 *

	 * @param	object

	 * @return	void

	 */

	public function decorate($parent)

	{

		$this->_parent = $parent;

		// Lock down attributes to what is defined in the class

		// and speed up references in magic methods

		$class_name = get_class($parent);

		if ( ! isset(self::$_reflections[$class_name]))

		{

			$r = new ReflectionObject($parent);

			foreach ($r->getMethods() as $method)

			{

				if ($method->isPublic())

				{

					$this->_methods[] = $method->getName();

				}

			}

			foreach ($r->getProperties() as $prop)

			{

				if ($prop->isPublic())

				{

					$this->_properties[] = $prop->getName();

				}

			}

			self::$_reflections[$class_name] = array($this->_methods, $this->_properties);

		}

		else

		{

			list($this->_methods, $this->_properties) = self::$_reflections[$class_name];

		}

	}

	// --------------------------------------------------------------------

	/**

	 * __call magic method

	 *

	 * Handles access to the parent driver library's methods

	 *

	 * @param	string

	 * @param	array

	 * @return	mixed

	 */

	public function __call($method, $args = array())

	{

		if (in_array($method, $this->_methods))

		{

			return call_user_func_array(array($this->_parent, $method), $args);

		}

		throw new BadMethodCallException('No such method: '.$method.'()');

	}

	// --------------------------------------------------------------------

	/**

	 * __get magic method

	 *

	 * Handles reading of the parent driver library's properties

	 *

	 * @param	string

	 * @return	mixed

	 */

	public function __get($var)

	{

		if (in_array($var, $this->_properties))

		{

			return $this->_parent->$var;

		}

	}

	// --------------------------------------------------------------------

	/**

	 * __set magic method

	 *

	 * Handles writing to the parent driver library's properties

	 *

	 * @param	string

	 * @param	array

	 * @return	mixed

	 */

	public function __set($var, $val)

	{

		if (in_array($var, $this->_properties))

		{

			$this->_parent->$var = $val;

		}

	}

}