<?php
/*
 * edite in NetBeans of IDE at version 7.0.1.
 */
/**
 * ??????
 * ????????????
 *
 * @author Zuolong Wang
 */
class Plugin {
    private static $_pluginDir = 'Plug-in';
    private static $_instance = null;
    private static $_plugins = array();
    /**
     *?????
     * 2011-11-22 ????? '.php'
     * @var static
     */
    private static $_ext = '.php';
    private function __construct() {
        //???
        defined('BIC_ROOT') || define('BIC_ROOT',substr(dirname(__FILE__),0,-16));
        define('DS',DIRECTORY_SEPARATOR);
        $this -> _pluginPath = BIC_ROOT . self :: $_pluginDir;
    }
    public static function init(){
        if (is_null(self :: $_instance)){
            self :: $_instance = new self();
        }
        return self :: $_instance;
    }
    public function add($hook,$pluginName){
        self :: $_plugins[$hook][] = $pluginName;
    }
    /**
     *????hook???????,???????
     * @param type $hook
     * @return type 
     */
    public function trigger($hook){
        if (!isset(self :: $_plugins[$hook])) return;
        foreach (self :: $_plugins[$hook] as $plugin){
            //????
            if (is_dir($this -> _pluginPath . $plugin)){
                $plugin_file = $this -> _pluginPath . $plugin . DS . $plugin . self :: $_ext;
            }else{
                $plugin_file = $this -> _pluginPath . DS . $plugin . self :: $_ext;
            }
            //?????
            if (is_string($plugin) && preg_match("/^[\w\-\/]+/mi",$plugin) && is_file($plugin_file)){
                require $plugin_file;
                /**
                 * ???trigger()??????????????doAction()???????
                 */
                $params =  array_slice(func_get_args(),1);
                call_user_func_array(array(new $plugin(),'doAction'),$params);
            }else{
                self :: log('???????????????? ?'.$plugin_file);
            }
        }
    }
    /**
     *??????
     * @param type $msg 
     */
    private static function log($msg){
        echo $msg;
    }
}

interface IPlugin{
    function doAction();
}
?>