<?php
/**
 * Instance creator
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package Wombat
 * @subpackage base
 */

/**
 * Instance creator
 *
 * Functor to encapsulate new operator
 *
 * @version 0.5.0
 * @package Wombat
 * @subpackage base
 */
class WBClass_Creator_patSession extends WBClass_Creator
{
    /**
     * tells whether this object is the first created
     * @return bool
     */
    static protected $created = false;

    /**
     * Configuration loader
     * @var WBConfig
     */
    private $config;

   /**
    * return new object
    *
    * @return object
    */
    public function instantiate($parameter = array())
    {
        if (self::$created) {
            $obj    = patSession::singleton('wombat');
            return $obj;
        }
        self::$created  =   true;

        WBClass::load('WBLog'
                    , 'WBConfig'
                    , 'WBString'
                    , 'WBErrorHandler_Pat'
                    , 'patSession');

        $this->config   =   WBClass::create('WBConfig');
        $this->config->load('config');

        $sessName   =   $this->config->get('session/name', 'WBS');
        $domain     =   $this->config->get('session/domain', '');
        if (!empty($domain)) {
            $domain =   WBString::replaceSuperplaceholders($domain);
        }

        $container  =   $this->config->get('session/container', 'Native');
        $container  =   WBParam::get('wb/session/container', $container);
        if (isset($parameter['container'])) {
            $container  =   $parameter['container'];
        }
        $expire     =   $this->config->get('session/expire', 86400);
        $options    =   array(
                            'empty-referer'     =>  'allow',
                            //'security'          =>  'fix_browser,fix-referer,fix_ip',
                            'security'          =>  'fix-referer,fix_ip',
                            'name'              =>  $sessName,
                            //'id-prefix'     =>  'WBS',
                            'cookie-lifetime'   =>  $expire,
                            'expire'            =>  $expire
                        );

        if ($domain) {
            $options['cookie_domain']   =   $domain;
            $options['allow-referer']   =   '*.' . $domain;
        }

        // prefer cookies but accept request variables as well
        if (isset($_COOKIE[$sessName]) && !empty($_COOKIE[$sessName])) {
            $options['id']  =   $_COOKIE[$sessName];
            unset($_COOKIE[$sessName]);
        }
        if (isset($_POST[$sessName]) && !empty($_POST[$sessName])){
            $options['id']  =   $_POST[$sessName];
            unset($_POST[$sessName]);
        }

        /** @var patSession_Storage */
        $obj        =   patSession::singleton('wombat', $container, $options);

        if ($obj->getState() !== 'active') {
            WBParam::set('wb/session/id', $obj->id);
            $logger =   WBLog::start('session');
            $log    =   array(
                'action'        =>  'restart',
                'state'         =>  $obj->getState()
            );

            $logger->warn($log);
            $obj->restart();
        }

        // keep orginal session id
        if ($obj->has('wb/session/id')) {
            WBParam::set('wb/session/id', $obj->get('wb.session.id'));
        }
        else {
            WBParam::set('wb/session/id', $obj->id);
            $obj->set('wb.session.id', $obj->id);
        }

        // logging facility
        $logger =   WBLog::start('session');
        if (!$obj->isNew()) {

            // log counter
            $timer  =   $obj->getTimer();
            $log    =   array(
                'action'        =>  'continue',
                'count'         =>  $obj->counter,
                'elapsed-start' =>  $timer['elapsed_start'],
                'elapsed-last'  =>  $timer['elapsed_last'],
                'cookie'        =>  $options['id']
            );
            $logger->info( $log );
            return $obj;
        }


        $stat   =   WBClass::create('WBStatistic_Session');
        $stat->add();

        // log everything about browser
        $log    = array(
                'action'            =>  'start',
                'user-agent'        =>  'undefined',
                'accept'            =>  'undefined',
                'accept-encoding'   =>  'undefined',
                'accept-lang'       =>  'undefined',
                'accept-charset'    =>  'undefined'
            );

        if( isset( $_SERVER['HTTP_USER_AGENT'] ) ) {
            $log['user-agent']  =   $_SERVER['HTTP_USER_AGENT'];
        }
        if( isset( $_SERVER['HTTP_ACCEPT'] ) ) {
            $log['accept']  =   $_SERVER['HTTP_ACCEPT'];
        }
        if( isset( $_SERVER['HTTP_ACCEPT_ENCODING'] ) ) {
            $log['accept-encoding'] =   $_SERVER['HTTP_ACCEPT_ENCODING'];
        }
        if( isset( $_SERVER['HTTP_ACCEPT_LANGUAGE'] ) ) {
            $log['accept-lang'] =   $_SERVER['HTTP_ACCEPT_LANGUAGE'];
        }
        if( isset( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
            $log['accept-charset']  =   $_SERVER['HTTP_ACCEPT_CHARSET'];
        }

        $logger->notice( $log );
        return $obj;
    }
}