<?php

// +----------------------------------------------------------------------

// | ThinkPHP

// +----------------------------------------------------------------------

// | Copyright (c) 2008 http://thinkphp.cn All rights reserved.

// +----------------------------------------------------------------------

// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )

// +----------------------------------------------------------------------

// | Author: liu21st <liu21st@gmail.com>

// | Modify: yhustc <yhustc@gmail.com>

// +----------------------------------------------------------------------

// $Id$



/**

 +----------------------------------------------------------

 * ????????

 +----------------------------------------------------------

 * @return void

 +----------------------------------------------------------

 */

function empty_dir($directory)

{

    $handle = opendir($directory);

    while (($file = readdir($handle)) !== false)

    {

        if ($file != "." && $file != "..")

        {

            closedir($handle);

            return false;

        }

    }

    closedir($handle);

    return true;

}



/**

 +----------------------------------------------------------

 * ????

 +----------------------------------------------------------

 * @param string $path ????

 * @param string $app ?????

 +----------------------------------------------------------

 * @return Array

 +----------------------------------------------------------

 */

function get_plugins($path=PLUGIN_PATH,$app=APP_NAME,$ext='.php')

{

    static $plugins = array ();

    if(isset($plugins[$app])) {

        return $plugins[$app];

    }

    // ???????? ?????

    if(empty_dir($path)) {

        return array();

    }

    $path = realpath($path);



    // ???? ????????

    /*

    $dir = glob ( $path . '/*' );

    if($dir) {

       foreach($dir as $val) {

            if(is_dir($val)){

                $subdir = glob($val.'/*'.$ext);

                if($subdir) {

                    foreach($subdir as $file)

                        $plugin_files[] = $file;

                }

            }else{

                if (strrchr($val, '.') == $ext)

                    $plugin_files[] = $val;

            }

       }

       */



    $dir = dir($path);

    if($dir) {

        $plugin_files = array();

        while (false !== ($file = $dir->read())) {

            if($file == "." || $file == "..")   continue;

            if(is_dir($path.'/'.$file)){

                    $subdir =  dir($path.'/'.$file);

                    if ($subdir) {

                        while (($subfile = $subdir->read()) !== false) {

                            if($subfile == "." || $subfile == "..")   continue;

                            if (preg_match('/\.php$/', $subfile))

                                $plugin_files[] = "$file/$subfile";

                        }

                        $subdir->close();

                    }

            }else{

                $plugin_files[] = $file;

            }

        }

        $dir->close();



        //???????

        if(count($plugin_files)>1) {

            sort($plugin_files);

        }

        $plugins[$app] = array();

        foreach ($plugin_files as $plugin_file) {

            if ( !is_readable("$path/$plugin_file"))        continue;

            //?????????

            $plugin_data = get_plugin_info("$path/$plugin_file");

            if (empty ($plugin_data['name'])) {

                continue;

            }

            $plugins[$app][] = $plugin_data;

        }

       return $plugins[$app];

    }else {

        return array();

    }

}



/**

 +----------------------------------------------------------

 * ??????

 +----------------------------------------------------------

 * @param string $plugin_file ?????

 +----------------------------------------------------------

 * @return Array

 +----------------------------------------------------------

 */

function get_plugin_info($plugin_file) {



    $plugin_data = file_get_contents($plugin_file);

    preg_match("/Plugin Name:(.*)/i", $plugin_data, $plugin_name);

    if(empty($plugin_name)) {

        return false;

    }

    preg_match("/Plugin URI:(.*)/i", $plugin_data, $plugin_uri);

    preg_match("/Description:(.*)/i", $plugin_data, $description);

    preg_match("/Author:(.*)/i", $plugin_data, $author_name);

    preg_match("/Author URI:(.*)/i", $plugin_data, $author_uri);

    if (preg_match("/Version:(.*)/i", $plugin_data, $version))

        $version = trim($version[1]);

    else

        $version = '';

    if(!empty($author_name)) {

        if(!empty($author_uri)) {

            $author_name = '<a href="'.trim($author_uri[1]).'" target="_blank">'.$author_name[1].'</a>';

        }else {

            $author_name = $author_name[1];

        }

    }else {

        $author_name = '';

    }

    return array ('file'=>$plugin_file,'name' => trim($plugin_name[1]), 'uri' => trim($plugin_uri[1]), 'description' => trim($description[1]), 'author' => trim($author_name), 'version' => $version);

}



/**

 +----------------------------------------------------------

 * ??????????

 +----------------------------------------------------------

 * @param string $tag ????????

 * @param string $compiler ?????

 +----------------------------------------------------------

 * @return boolean

 +----------------------------------------------------------

 */

function add_compiler($tag,$compiler)

{

    $GLOBALS['template_compiler'][strtoupper($tag)] = $compiler ;

    return ;

}



/**

 +----------------------------------------------------------

 * ????????

 +----------------------------------------------------------

 * @param string $tag ????????

 +----------------------------------------------------------

 * @return boolean

 +----------------------------------------------------------

 */

function use_compiler($tag)

{

    $args = array_slice(func_get_args(), 1);

    if(is_callable($GLOBALS['template_compiler'][strtoupper($tag)])) {

        call_user_func_array($GLOBALS['template_compiler'][strtoupper($tag)],$args);

    }else{

        throw_exception(L('_TEMPLATE_ERROR_').'?'.C('TMPL_ENGINE_TYPE'));

    }

    return ;

}



/**

 +----------------------------------------------------------

 * ???????

 +----------------------------------------------------------

 * @param string $tag ?????

 * @param string $function ?????

 * @param integer $priority ?????

 * @param integer $args ??

 +----------------------------------------------------------

 * @return boolean

 +----------------------------------------------------------

 */

function add_filter($tag,$function,$priority = 10,$args = 1)

{

    static $_filter = array();

    if ( isset($_filter[APP_NAME.'_'.$tag]["$priority"]) ) {

        foreach($_filter[APP_NAME.'_'.$tag]["$priority"] as $filter) {

            if ( $filter['function'] == $function ) {

                return true;

            }

        }

    }

    $_filter[APP_NAME.'_'.$tag]["$priority"][] = array('function'=> $function,'args'=> $args);

    $_SESSION['_filters']   =   $_filter;

    return true;

}



/**

 +----------------------------------------------------------

 * ??????????

 +----------------------------------------------------------

 * @param string $tag ?????

 * @param string $function ?????

 * @param integer $priority ?????

 +----------------------------------------------------------

 * @return boolean

 +----------------------------------------------------------

 */

function remove_filter($tag, $function_to_remove, $priority = 10) {

    $_filter  = $_SESSION['_filters'];

    if ( isset($_filter[APP_NAME.'_'.$tag]["$priority"]) ) {

        $new_function_list = array();

        foreach($_filter[APP_NAME.'_'.$tag]["$priority"] as $filter) {

            if ( $filter['function'] != $function_to_remove ) {

                $new_function_list[] = $filter;

            }

        }

        $_filter[APP_NAME.'_'.$tag]["$priority"] = $new_function_list;

    }

    $_SESSION['_filters']   =   $_filter;

    return true;

}



/**

 +----------------------------------------------------------

 * ?????

 +----------------------------------------------------------

 * @param string $tag ?????

 * @param string $string ??

 +----------------------------------------------------------

 * @return boolean

 +----------------------------------------------------------

 */

function apply_filter($tag,$string='')

{

    if (!isset($_SESSION['_filters']) ||  !isset($_SESSION['_filters'][APP_NAME.'_'.$tag]) ) {

        return $string;

    }

    $_filter  = $_SESSION['_filters'][APP_NAME.'_'.$tag];

    ksort($_filter);

    $args = array_slice(func_get_args(), 2);

    foreach ($_filter as $priority => $functions) {

        if ( !is_null($functions) ) {

            foreach($functions as $function) {

                if(is_callable($function['function'])) {

                    $args = array_merge(array($string), $args);

                    $string = call_user_func_array($function['function'],$args);

                }

            }

        }

    }

    return $string;

}



/**

 +----------------------------------------------------------

 * ????????

 +----------------------------------------------------------

 * @param string $tag ??????

 * @param string $function ???????

 * @param integer $priority ?????

 * @param integer $args ????

 +----------------------------------------------------------

 * @return boolean

 +----------------------------------------------------------

 */

function add_action($tag,$function,$priority = 10,$args = '')

{

    static $_action = array();

	if(empty($priority)) //??args??,??????priority,????

		$priority = 10;



    if ( isset($_action[APP_NAME.'_'.$tag]["$priority"]) ) {

        foreach($_action[APP_NAME.'_'.$tag]["$priority"] as $action) {

            if ( $action['function'] == $function ) {

                return true;

            }

        }

    }

	$argArray = array_slice(func_get_args(), 3);

    $_action[APP_NAME.'_'.$tag]["$priority"][] = array('function'=> $function,'args'=>$argArray);

    $_SESSION['_actions']   =   $_action;

    return true;

}



/**

 +----------------------------------------------------------

 * ???????????

 +----------------------------------------------------------

 * @param string $tag ??????

 * @param string $function ???????

 * @param integer $priority ?????

 +----------------------------------------------------------

 * @return boolean

 +----------------------------------------------------------

 */

function remove_action($tag, $function_to_remove, $priority = 10) {

    $_action  = $_SESSION['_actions'];

    if ( isset($_action[APP_NAME.'_'.$tag]["$priority"]) ) {

        $new_function_list = array();

        foreach($_action[APP_NAME.'_'.$tag]["$priority"] as $action) {

            if ( $action['function'] != $function_to_remove ) {

                $new_function_list[] = $action;

            }

        }

        $_action[APP_NAME.'_'.$tag]["$priority"] = $new_function_list;

    }

    $_SESSION['_actions']   =   $_action;

    return true;

}



/**

 +----------------------------------------------------------

 * ??????

 +----------------------------------------------------------

 * @param string $tag ??????

 * @param string $string ??

 +----------------------------------------------------------

 * @return boolean

 +----------------------------------------------------------

 */

function apply_action($tag)

{

    if (!isset($_SESSION['_actions']) ||  !isset($_SESSION['_actions'][APP_NAME.'_'.$tag]) ) {

        return;

    }

    $_action  = $_SESSION['_actions'][APP_NAME.'_'.$tag];

    ksort($_action);

    foreach ($_action as $priority => $functions) {

        if ( !is_null($functions) ) {

            foreach($functions as $function) {

                if(is_callable($function['function'])) {

                    call_user_func_array($function['function'],$function['args']);

                }

            }

        }

    }

}

?>