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object.php

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<?php
/* SVN FILE: $Id: object_8php-source.html 675 2008-12-26 00:27:14Z gwoo $ */
/**
 * Object class, allowing __construct and __destruct in PHP4.
 *
 * Also includes methods for logging and the special method RequestAction,
 * to call other Controllers' Actions from anywhere.
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework <http://www.cakephp.org/>
 * Copyright 2005-2008, Cake Software Foundation, Inc.
 *                              1785 E. Sahara Avenue, Suite 490-204
 *                              Las Vegas, Nevada 89104
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright       Copyright 2005-2008, Cake Software Foundation, Inc.
 * @link                http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package         cake
 * @subpackage      cake.cake.libs
 * @since           CakePHP(tm) v 0.2.9
 * @version         $Revision: 675 $
 * @modifiedby      $LastChangedBy: gwoo $
 * @lastmodified    $Date: 2008-12-25 18:27:14 -0600 (Thu, 25 Dec 2008) $
 * @license         http://www.opensource.org/licenses/mit-license.php The MIT License
 */
/**
 * Object class, allowing __construct and __destruct in PHP4.
 *
 * Also includes methods for logging and the special method RequestAction,
 * to call other Controllers' Actions from anywhere.
 *
 * @package     cake
 * @subpackage  cake.cake.libs
 */
class Object{
/**
 * Log object
 *
 * @var object
 * @access protected
 */
    var $_log = null;
/**
 * A hack to support __construct() on PHP 4
 * Hint: descendant classes have no PHP4 class_name() constructors,
 * so this constructor gets called first and calls the top-layer __construct()
 * which (if present) should call parent::__construct()
 *
 * @return Object
 * @access public
 */
    function Object() {
        $args = func_get_args();
        if (method_exists($this, '__destruct')) {
            register_shutdown_function (array(&$this, '__destruct'));
        }
        call_user_func_array(array(&$this, '__construct'), $args);
    }
/**
 * Class constructor, overridden in descendant classes.
 *
 * @abstract
 * @access public
 */
    function __construct() {
    }

/**
 * Object-to-string conversion.
 * Each class can override this method as necessary.
 *
 * @return string The name of this class
 * @access public
 */
    function toString() {
        $class = get_class($this);
        return $class;
    }
/**
 * Calls a controller's method from any location. Allows for
 * controllers to communicate with each other.
 *
 * @param string $url  URL in the form of Cake URL ("/controller/method/parameter")
 * @param array $extra If array includes the key "return" it sets the AutoRender to true.
 * @return boolean  Success
 * @access public
 */
    function requestAction($url, $extra = array()) {
        if (!empty($url)) {
            $dispatcher =& new Dispatcher();
            if (isset($this->plugin)) {
                $extra['plugin'] = $this->plugin;
            }
            if (in_array('return', $extra, true)) {
                $extra['return'] = 0;
                $extra['bare'] = 1;
                $extra['requested'] = 1;
                ob_start();
                $out = $dispatcher->dispatch($url, $extra);
                $out = ob_get_clean();
                return $out;
            } else {
                $extra['return'] = 1;
                $extra['bare'] = 1;
                $extra['requested'] = 1;
                return $dispatcher->dispatch($url, $extra);
            }
        } else {
            return false;
        }
    }
/**
 * API for logging events.
 *
 * @param string $msg Log message
 * @param int $type Error type constant. Defined in app/config/core.php.
 * @access
 */
    function log($msg, $type = LOG_ERROR) {
        if (!class_exists('CakeLog')) {
            uses('cake_log');
        }

        if (is_null($this->_log)) {
            $this->_log = new CakeLog();
        }

        if (!is_string($msg)) {
            ob_start();
            print_r ($msg);
            $msg=ob_get_contents();
            ob_end_clean();
        }

        switch($type) {
            case LOG_DEBUG:
                return $this->_log->write('debug', $msg);
            break;
            default:
                return $this->_log->write('error', $msg);
            break;
        }
    }
/**
 * Used to report user friendly errors.
 * If there is a file app/error.php this file will be loaded
 * error.php is the AppError class it should extend ErrorHandler class.
 *
 * @param string $method Method to be called in the error class (AppError or ErrorHandler classes)
 * @param array $messages Message that is to be displayed by the error class
 * @return error message
 * @access public
 */
    function cakeError($method, $messages) {
        if (!class_exists('ErrorHandler')) {
            uses('error');
            if (file_exists(APP . 'error.php')) {
                include_once (APP . 'error.php');
            }
        }

        if (class_exists('AppError')) {
            $error = new AppError($method, $messages);
        } else {
            $error = new ErrorHandler($method, $messages);
        }
        return $error;
    }
/**
 * Checks for a persistent class file, if found file is opened and true returned
 * If file is not found a file is created and false returned
 *
 * There are many uses for this method, see manual for examples also art of
 * the cache system
 *
 * @param string $name name of class to persist
 * @param boolean $return
 * @param object $object
 * @param string $type
 * @return boolean
 * @todo add examples to manual
 * @access protected
 */
    function _persist($name, $return = null, &$object, $type = null) {
        $file = CACHE . 'persistent' . DS . strtolower($name) . '.php';
        if ($return === null) {
            if (!file_exists($file)) {
                return false;
            } else {
                return true;
            }
        }

        if (!file_exists($file)) {
            $this->_savePersistent($name, $object);
            return false;
        } else {
            $this->__openPersistent($name, $type);
            return true;
        }
    }
/**
 * You should choose a unique name for the persistent file
 *
 * There are many uses for this method, see manual for examples also part of
 * the cache system
 *
 * @param string $name name used for object to cache
 * @param object $object the object to persist
 * @return true on save, throws error if file can not be created
 * @access protected
 */
    function _savePersistent($name, &$object) {
        $file = 'persistent' . DS . strtolower($name) . '.php';
        $objectArray = array(&$object);
        $data = str_replace('\\', '\\\\', serialize($objectArray));
        $data = '<?php $' . $name . ' = \'' . str_replace('\'', '\\\'', $data) . '\' ?>';
        cache($file, $data, '+1 day');
    }
/**
 * Open the persistent class file for reading
 * Used by Object::_persist(), part of the cache
 * system
 *
 * @param string $name Name of the persistant file
 * @param string $type
 * @access private
 */
    function __openPersistent($name, $type = null) {
        $file = CACHE . 'persistent' . DS . strtolower($name) . '.php';
        include($file);

        switch($type) {
            case 'registry':
                $vars = unserialize(${$name});
                foreach ($vars['0'] as $key => $value) {
                    loadModel(Inflector::classify($key));
                }
                unset($vars);
                $vars = unserialize(${$name});
                foreach ($vars['0'] as $key => $value) {
                    ClassRegistry::addObject($key, $value);
                    unset ($value);
                }
                unset($vars);
            break;
            default:
                $vars = unserialize(${$name});
                $this->{$name} = $vars['0'];
                unset($vars);
            break;
        }
    }
}
?>

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