<?php
/**
 *
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Andreas Gohr <gohr@cosmocode.de>
 */

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

if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
require_once(DOKU_PLUGIN.'action.php');

class action_plugin_statistics extends DokuWiki_Action_Plugin {

    /**
     * register the eventhandlers and initialize some options
     */
    function register(&$controller){
        global $JSINFO;
        global $ACT;
        $JSINFO['act'] = $ACT;


        $controller->register_hook('IO_WIKIPAGE_WRITE',
                                   'BEFORE',
                                   $this,
                                   'logedits',
                                   array());
        $controller->register_hook('SEARCH_QUERY_FULLPAGE',
                                   'AFTER',
                                   $this,
                                   'logsearch',
                                   array());
        $controller->register_hook('ACTION_ACT_PREPROCESS',
                                   'BEFORE',
                                   $this,
                                   'loglogins',
                                   array());
        $controller->register_hook('AUTH_USER_CHANGE',
                                   'AFTER',
                                   $this,
                                   'logregistration',
                                   array());
    }


    /**
     * @fixme call this in the webbug call
     */
    function putpixel(){
        global $ID;
        $url = DOKU_BASE.'lib/plugins/statistics/log.php?p='.rawurlencode($ID).
               '&amp;r='.rawurlencode($_SERVER['HTTP_REFERER']).'&rnd='.time();

        echo '<noscript><img src="'.$url.'" width="1" height="1" /></noscript>';
    }


    /**
     * Log page edits actions
     */
    function logedits(&$event, $param){
        if($event->data[3]) return; // no revision

        if(file_exists($event->data[0][0])){
            if($event->data[0][1] == ''){
                $type = 'D';
            }else{
                $type = 'E';
            }
        }else{
            $type = 'C';
        }
        $hlp = plugin_load('helper','statistics');
        $hlp->Logger()->log_edit(cleanID($event->data[1].':'.$event->data[2]), $type);
    }

    /**
     * Log internal search
     */
    function logsearch(&$event, $param){
        $hlp = plugin_load('helper','statistics');
        $hlp->Logger()->log_search('',$event->data['query'],$event->data['highlight'],'dokuwiki');
    }

    /**
     * Log login/logouts
     */
    function loglogins(&$event, $param){
        $type = '';
        $act = $this->_act_clean($event->data);
        if($act == 'logout'){
            $type = 'o';
        }elseif($_SERVER['REMOTE_USER'] && $act=='login'){
            if($_REQUEST['r']){
                $type = 'p';
            }else{
                $type = 'l';
            }
        }elseif($_REQUEST['u'] && !$_REQUEST['http_credentials'] && !$_SERVER['REMOTE_USER']){
            $type = 'f';
        }
        if(!$type) return;

        $hlp = plugin_load('helper','statistics');
        $hlp->Logger()->log_login($type);
    }

    /**
     * Log user creations
     */
    function logregistration(&$event, $param){
        if($event->data['type'] == 'create'){
            $hlp = plugin_load('helper','statistics');
            $hlp->Logger()->log_login('C',$event->data['params'][0]);
        }
    }

    /**
     * Pre-Sanitize the action command
     *
     * Similar to act_clean in action.php but simplified and without
     * error messages
     */
    function _act_clean($act){
         // check if the action was given as array key
         if(is_array($act)){
           list($act) = array_keys($act);
         }

         //remove all bad chars
         $act = strtolower($act);
         $act = preg_replace('/[^a-z_]+/','',$act);

         return $act;
     }
}