<?php
/**
 * AJAX call handler for ACL plugin
 *
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Andreas Gohr <andi@splitbrain.org>
 */

// must be run within Dokuwiki
if(!defined('DOKU_INC')) die();

/**
 * Register handler
 */
class action_plugin_acl extends DokuWiki_Action_Plugin {

    /**
     * Registers a callback function for a given event
     *
     * @param Doku_Event_Handler $controller DokuWiki's event controller object
     * @return void
     */
    public function register(Doku_Event_Handler &$controller) {

        $controller->register_hook('AJAX_CALL_UNKNOWN', 'BEFORE', $this, 'handle_ajax_call_acl');

    }

    /**
     * AJAX call handler for ACL plugin
     *
     * @param Doku_Event $event  event object by reference
     * @param mixed      $param  empty
     * @return void
     */

    public function handle_ajax_call_acl(Doku_Event &$event, $param) {
        if ($event->data !== 'plugin_acl') {
            return;
        }
        $event->stopPropagation();
        $event->preventDefault();


        //close session
        session_write_close();

        global $conf;
        global $ID;
        global $INPUT;

        //fix for Opera XMLHttpRequests
        $postData = http_get_raw_post_data();
        if(!count($_POST) && !empty($postData)){
            parse_str($postData, $_POST);
        }

        if(!auth_isadmin()) die('for admins only');
        if(!checkSecurityToken()) die('CRSF Attack');

        $ID    = getID();

        /** @var $acl admin_plugin_acl */
        $acl = plugin_load('admin','acl');
        $acl->handle();

        $ajax = $INPUT->str('ajax');
        header('Content-Type: text/html; charset=utf-8');

        if($ajax == 'info'){
            $acl->_html_info();
        }elseif($ajax == 'tree'){

            $ns  = $INPUT->str('ns');
            if($ns == '*'){
                $ns ='';
            }
            $ns  = cleanID($ns);
            $lvl = count(explode(':',$ns));
            $ns  = utf8_encodeFN(str_replace(':','/',$ns));

            $data = $acl->_get_tree($ns,$ns);

            foreach(array_keys($data) as $item){
                $data[$item]['level'] = $lvl+1;
            }
            echo html_buildlist($data, 'acl', array($acl, '_html_list_acl'),
                                array($acl, '_html_li_acl'));
        }
    }
}