<?php /** * CodeIgniter * * An open source application development framework for PHP 5.2.4 or newer * * NOTICE OF LICENSE * * Licensed under the Open Software License version 3.0 * * This source file is subject to the Open Software License (OSL 3.0) that is * bundled with this package in the files license.txt / license.rst. It is * also available through the world wide web at this URL: * http://opensource.org/licenses/OSL-3.0 * If you did not receive a copy of the license and are unable to obtain it * through the world wide web, please send an email to * licensing@ellislab.com so we can send you a copy immediately. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2013, EllisLab, Inc. (http://ellislab.com/) * @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0) * @link http://codeigniter.com * @since Version 1.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * Hooks Class * * Provides a mechanism to extend the base system without hacking. * * @package CodeIgniter * @subpackage Libraries * @category Libraries * @author EllisLab Dev Team * @link http://codeigniter.com/user_guide/libraries/encryption.html */ class CI_Hooks { /** * Determines whether hooks are enabled * * @var bool */ public $enabled = FALSE; /** * List of all hooks set in config/hooks.php * * @var array */ public $hooks = array(); /** * Array with class objects to use hooks methods * * @var array */ protected $_objects = array(); /** * In progress flag * * Determines whether hook is in progress, used to prevent infinte loops * * @var bool */ protected $_in_progress = FALSE; /** * Class constructor * * @return void */ public function __construct() { $CFG =& load_class('Config', 'core'); log_message('debug', 'Hooks Class Initialized'); // If hooks are not enabled in the config file // there is nothing else to do if ($CFG->item('enable_hooks') === FALSE) { return; } // Grab the "hooks" definition file. if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/hooks.php')) { include(APPPATH.'config/'.ENVIRONMENT.'/hooks.php'); } if (file_exists(APPPATH.'config/hooks.php')) { include(APPPATH.'config/hooks.php'); } // If there are no hooks, we're done. if ( ! isset($hook) OR ! is_array($hook)) { return; } $this->hooks =& $hook; $this->enabled = TRUE; } // -------------------------------------------------------------------- /** * Call Hook * * Calls a particular hook. Called by CodeIgniter.php. * * @uses CI_Hooks::_run_hook() * * @param string $which Hook name * @return bool TRUE on success or FALSE on failure */ public function call_hook($which = '') { if ( ! $this->enabled OR ! isset($this->hooks[$which])) { return FALSE; } if (isset($this->hooks[$which][0]) && is_array($this->hooks[$which][0])) { foreach ($this->hooks[$which] as $val) { $this->_run_hook($val); } } else { $this->_run_hook($this->hooks[$which]); } return TRUE; } // -------------------------------------------------------------------- /** * Run Hook * * Runs a particular hook * * @param array $data Hook details * @return bool TRUE on success or FALSE on failure */ protected function _run_hook($data) { if ( ! is_array($data)) { return FALSE; } // ----------------------------------- // Safety - Prevents run-away loops // ----------------------------------- // If the script being called happens to have the same // hook call within it a loop can happen if ($this->_in_progress === TRUE) { return; } // ----------------------------------- // Set file path // ----------------------------------- if ( ! isset($data['filepath'], $data['filename'])) { return FALSE; } $filepath = APPPATH.$data['filepath'].'/'.$data['filename']; if ( ! file_exists($filepath)) { return FALSE; } // Determine and class and/or function names $class = empty($data['class']) ? FALSE : $data['class']; $function = empty($data['function']) ? FALSE : $data['function']; $params = isset($data['params']) ? $data['params'] : ''; if (empty($function)) { return FALSE; } // Set the _in_progress flag $this->_in_progress = TRUE; // Call the requested class and/or function if ($class !== FALSE) { // The object is stored? if (isset($this->_objects[$class])) { if (method_exists($this->_objects[$class], $function)) { $this->_objects[$class]->$function($params); } else { return $this->_in_progress = FALSE; } } else { class_exists($class, FALSE) OR require_once($filepath); if ( ! class_exists($class, FALSE) OR ! method_exists($class, $function)) { return $this->_in_progress = FALSE; } // Store the object and execute the method $this->_objects[$class] = new $class(); $this->_objects[$class]->$function($params); } } else { function_exists($function) OR require_once($filepath); if ( ! function_exists($function)) { return $this->_in_progress = FALSE; } $function($params); } $this->_in_progress = FALSE; return TRUE; } } /* End of file Hooks.php */ /* Location: ./system/core/Hooks.php */