<?php
/**
 * Statistic module for page and content views
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage base
 */

WBClass::load('WBStatistic');

/**
 * Statistic module for page and content views
 *
 * Simple interface to save page statistic
 *
 * @version 0.1.2
 * @package WB
 * @subpackage base
 */
class WBStatistic_Session extends WBStatistic
{
    /**
     * name of session view table
     */
    const TABLE = 'sessionview';

    const UNDEFINED = 'undefined';

    /**
     * Browser info
     * @var WBInfo_Browser
     */
    private $bi;

    /**
     * Store new session
     *
     * Store browser information for each new session
     *
     * @param string $path
     * @param string $namespace
     */
    public function add()
    {
        if (!$this->enabled) {
            return;
        }

        WBClass::load('WBException_Config');
        try{
            $this->table->getTableInfo(self::TABLE);
        } catch(WBException_Config $e) {
            return;
        }

        $uid    =   $this->user->getId();
        if (!$uid) {
            $uid = 0;
        }

        $save   = array(
                    'trackid'           =>  $this->getTrackingId(),
                    'addr'              =>  $this->getAddress(),
                    $this->uPrimary     =>  $uid,
                    'useragent'         =>  self::UNDEFINED,
                    'acceptlang'        =>  self::UNDEFINED,
                );

        if (isset($_SERVER['HTTP_USER_AGENT'])) {
            $save['useragent']      =   $_SERVER['HTTP_USER_AGENT'];
        }
        if (isset( $_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
            $save['acceptlang']     =   $_SERVER['HTTP_ACCEPT_LANGUAGE'];
        }

        $save['preferedlang']   =   $this->detectPreferdLang($save['acceptlang']);
        $this->addBrowserInfo($save, $save['useragent']);

        $this->table->save(self::TABLE, '__new', $save);
    }

    /**
     * Detect browser and add info
     *
     * Controlled by WBParam "wb/statistic/browser/detect".
     *
     * @see WBInfo_Browser
     * @see WBParam
     * @param array $data
     * @param string $useragent
     */
    private function addBrowserInfo(&$data, $useragent)
    {
        if (self::UNDEFINED == $useragent) {
            return '';
        }
        if (!WBParam::get('wb/statistic/browser/detect', 1)) {
            return;
        }

        $this->bi   =   WBClass::create('WBInfo_Browser');
        $this->bi->detect($useragent);

        if ($this->bi->isCrawler()) {
            $data['hint']   =   'spider';
            $this->sess->set(WBStatistic::SESS_KEY_HINT, 'spider');
        }

        $data['browser']        =   $this->bi->getName();
        $data['platform']       =   $this->bi->getPlatform();
        $data['majorversion']   =   $this->bi->getVersion(WBInfo_Browser::VER_TYPE_MAJOR);
        $data['minorversion']   =   $this->bi->getVersion(WBInfo_Browser::VER_TYPE_MINOR);

        if (empty($data['browser'])) {
            $data['browser']    =   '';
        }
        if (empty($data['platform'])) {
            $data['platform']   =   '';
        }
    }

    /**
     * Get prefered language
     *
     * Extract first language from accept language and return normalized 5-letter
     * lang code.
     *
     * @param string $acceptlang
     * @return string
     */
    private function detectPreferdLang($acceptlang)
    {
        if (self::UNDEFINED == $acceptlang) {
            return '';
        }

        $lang   =   explode(',', $acceptlang);
        $lang   =   trim($lang[0]);
        if (empty($lang)) {
            return '';
        }

        $lang       =   explode('-', $lang);
        $lang[0]    =   strtolower($lang[0]);
        if (2 != count($lang)) {
            return $lang[0];
        }
        $lang[1]    =   strtoupper($lang[1]);
        return $lang[0] . '_' . $lang[1];
    }
}