<?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;
    }
}