Viewing file: Hooks.php (4.35 KB) -rwxr-xr-x Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) |
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); /** * CodeIgniter * * An open source application development framework for PHP 5.1.6 or newer * * @package CodeIgniter * @author ExpressionEngine Dev Team * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. * @license http://codeigniter.com/user_guide/license.html * @link http://codeigniter.com * @since Version 1.0 * @filesource */
// ------------------------------------------------------------------------
/** * CodeIgniter Hooks Class * * Provides a mechanism to extend the base system without hacking. * * @package CodeIgniter * @subpackage Libraries * @category Libraries * @author ExpressionEngine Dev Team * @link http://codeigniter.com/user_guide/libraries/encryption.html */ class CI_Hooks {
var $enabled = FALSE; var $hooks = array(); var $in_progress = FALSE;
/** * Constructor * */ function __construct() { $this->_initialize(); log_message('debug', "Hooks Class Initialized"); }
// --------------------------------------------------------------------
/** * Initialize the Hooks Preferences * * @access private * @return void */ function _initialize() { $CFG =& load_class('Config', 'core');
// If hooks are not enabled in the config file // there is nothing else to do
if ($CFG->item('enable_hooks') == FALSE) { return; }
// Grab the "hooks" definition file. // If there are no hooks, we're done.
if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/hooks'.EXT)) { include(APPPATH.'config/'.ENVIRONMENT.'/hooks'.EXT); } elseif (is_file(APPPATH.'config/hooks'.EXT)) { include(APPPATH.'config/hooks'.EXT); }
if ( ! isset($hook) OR ! is_array($hook)) { return; }
$this->hooks =& $hook; $this->enabled = TRUE; }
// --------------------------------------------------------------------
/** * Call Hook * * Calls a particular hook * * @access private * @param string the hook name * @return mixed */ function _call_hook($which = '') { if ( ! $this->enabled OR ! isset($this->hooks[$which])) { return FALSE; }
if (isset($this->hooks[$which][0]) AND is_array($this->hooks[$which][0])) { foreach ($this->hooks[$which] as $val) { $this->_run_hook($val); } } else { $this->_run_hook($this->hooks[$which]); }
return TRUE; }
// --------------------------------------------------------------------
/** * Run Hook * * Runs a particular hook * * @access private * @param array the hook details * @return bool */ function _run_hook($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($data['filepath']) OR ! isset($data['filename'])) { return FALSE; }
$filepath = APPPATH.$data['filepath'].'/'.$data['filename'];
if ( ! file_exists($filepath)) { return FALSE; }
// ----------------------------------- // Set class/function name // -----------------------------------
$class = FALSE; $function = FALSE; $params = '';
if (isset($data['class']) AND $data['class'] != '') { $class = $data['class']; }
if (isset($data['function'])) { $function = $data['function']; }
if (isset($data['params'])) { $params = $data['params']; }
if ($class === FALSE AND $function === FALSE) { return FALSE; }
// ----------------------------------- // Set the in_progress flag // -----------------------------------
$this->in_progress = TRUE;
// ----------------------------------- // Call the requested class and/or function // -----------------------------------
if ($class !== FALSE) { if ( ! class_exists($class)) { require($filepath); }
$HOOK = new $class; $HOOK->$function($params); } else { if ( ! function_exists($function)) { require($filepath); }
$function($params); }
$this->in_progress = FALSE; return TRUE; }
}
// END CI_Hooks class
/* End of file Hooks.php */ /* Location: ./system/core/Hooks.php */
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