233 lines
No EOL
4.3 KiB
PHP
233 lines
No EOL
4.3 KiB
PHP
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP 5.1.6 or newer
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*
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* @package CodeIgniter
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* @author ExpressionEngine Dev Team
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
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* @license http://codeigniter.com/user_guide/license.html
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* @link http://codeigniter.com
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* @since Version 1.0
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* @filesource
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*/
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// ------------------------------------------------------------------------
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/**
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* CodeIgniter Hooks Class
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*
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* Provides a mechanism to extend the base system without hacking.
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*
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* @package CodeIgniter
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* @subpackage Libraries
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* @category Libraries
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* @author ExpressionEngine Dev Team
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* @link http://codeigniter.com/user_guide/libraries/encryption.html
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*/
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class CI_Hooks {
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var $enabled = FALSE;
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var $hooks = array();
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var $in_progress = FALSE;
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/**
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* Constructor
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*
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*/
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function __construct()
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{
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$this->_initialize();
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log_message('debug', "Hooks Class Initialized");
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}
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// --------------------------------------------------------------------
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/**
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* Initialize the Hooks Preferences
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*
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* @access private
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* @return void
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*/
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function _initialize()
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{
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$CFG =& load_class('Config', 'core');
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// If hooks are not enabled in the config file
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// there is nothing else to do
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if ($CFG->item('enable_hooks') == FALSE)
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{
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return;
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}
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// Grab the "hooks" definition file.
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// If there are no hooks, we're done.
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if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/hooks.php'))
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{
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include(APPPATH.'config/'.ENVIRONMENT.'/hooks.php');
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}
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elseif (is_file(APPPATH.'config/hooks.php'))
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{
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include(APPPATH.'config/hooks.php');
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}
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if ( ! isset($hook) OR ! is_array($hook))
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{
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return;
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}
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$this->hooks =& $hook;
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$this->enabled = TRUE;
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}
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// --------------------------------------------------------------------
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/**
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* Call Hook
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*
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* Calls a particular hook
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*
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* @access private
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* @param string the hook name
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* @return mixed
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*/
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function _call_hook($which = '')
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{
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if ( ! $this->enabled OR ! isset($this->hooks[$which]))
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{
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return FALSE;
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}
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if (isset($this->hooks[$which][0]) AND is_array($this->hooks[$which][0]))
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{
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foreach ($this->hooks[$which] as $val)
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{
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$this->_run_hook($val);
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}
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}
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else
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{
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$this->_run_hook($this->hooks[$which]);
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}
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return TRUE;
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}
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// --------------------------------------------------------------------
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/**
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* Run Hook
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*
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* Runs a particular hook
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*
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* @access private
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* @param array the hook details
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* @return bool
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*/
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function _run_hook($data)
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{
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if ( ! is_array($data))
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{
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return FALSE;
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}
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// -----------------------------------
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// Safety - Prevents run-away loops
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// -----------------------------------
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// If the script being called happens to have the same
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// hook call within it a loop can happen
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if ($this->in_progress == TRUE)
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{
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return;
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}
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// -----------------------------------
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// Set file path
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// -----------------------------------
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if ( ! isset($data['filepath']) OR ! isset($data['filename']))
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{
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return FALSE;
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}
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$filepath = APPPATH.$data['filepath'].'/'.$data['filename'];
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if ( ! file_exists($filepath))
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{
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return FALSE;
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}
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// -----------------------------------
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// Set class/function name
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// -----------------------------------
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$class = FALSE;
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$function = FALSE;
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$params = '';
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if (isset($data['class']) AND $data['class'] != '')
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{
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$class = $data['class'];
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}
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if (isset($data['function']))
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{
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$function = $data['function'];
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}
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if (isset($data['params']))
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{
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$params = $data['params'];
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}
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if ($class === FALSE AND $function === FALSE)
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{
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return FALSE;
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}
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// -----------------------------------
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// Set the in_progress flag
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// -----------------------------------
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$this->in_progress = TRUE;
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// -----------------------------------
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// Call the requested class and/or function
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// -----------------------------------
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if ($class !== FALSE)
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{
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if ( ! class_exists($class))
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{
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require($filepath);
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}
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$HOOK = new $class;
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$HOOK->$function($params);
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}
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else
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{
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if ( ! function_exists($function))
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{
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require($filepath);
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}
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$function($params);
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}
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$this->in_progress = FALSE;
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return TRUE;
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}
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}
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// END CI_Hooks class
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/* End of file Hooks.php */
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/* Location: ./system/core/Hooks.php */ |