<?php
/**
 * Content component: Redirect
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage content
 */

/**
 * Load base class
 */
WBClass::load('WBContent'
    , 'WBString');

/**
 * Content component: Redirect
 *
 * @version 1.3.0
 * @package WB
 * @subpackage content
 */
class WBContent_Redirect extends WBContent
{
   /**
    * My Parameter List
    *
    * - map:
    * - langmap like de => 'https://www.example.com/de/'
    * - session: use variable from session as redirect URL
    *
    * @var array
    */
    protected $config = array(
            'url'       =>  '[[SELF]]',
            'status'    =>  301,
            'withpath'  =>  1,
            'withget'   =>  1,
            'langmap'   =>  array(),
            'map'       =>  array(),
            'session'   =>  ''
        );

    /**
     * Redirect
     *
     * Redirect to other page
     *
     * @return array parameter list
     * @cation this method does not return
     */
    public function run()
    {
        $path   =   '';
        if (!empty($this->config['__path'])) {
            $path   =   implode('/', $this->config['__path']);
        }
        $rUrl   =   $this->findTarget4Session();
        if (empty($rUrl)) {
            $rUrl   =   $this->findTarget4Path($path);
        }
        if (empty($rUrl)) {
            $rUrl   =   $this->findLangUrl();
            if (0 < intval($this->config['withpath']) && !empty($this->config['__path'])) {
                $rUrl   .=  $path;
            }
        }

        // detect cycle
        if ('[[SELF]]' . $path == $rUrl) {
            $rUrl   =   '[[SELF]]';
        }

        $res        =   WBClass::create('WBResponse');
        $status     =   $this->config['status'];
        $get        =   $this->req->export();
        if (0 < intval($this->config['withget']) && !empty($get)) {
            $get    =   http_build_query($get);
            $rUrl   .=  '?' . $get;
        }

        $rUrl   =   WBString::replaceSuperPlaceholders($rUrl);

        if (1 > WBParam::get('wb/debug', 0)) {
            $res->addHeader('Location', $rUrl);
            $res->setStatus($status);
        }
        else if (9 < WBParam::get('wb/debug', 0)) {
            $res->add("<h2>Debug Redirect</h2>\n");
            $res->add("<pre>" . print_r($this->config, true) . "</pre>\n");
        }

        $data   =   str_replace('{URL}', $rUrl, 'Please continue at <a href="{URL}" title="follow redirect to continue">{URL}</a>. Thank you.');
        $res->add($data);

        $res->send($this->req);
        exit(0);
    }

    private function findLangUrl()
    {
        $url    =   $this->config['url'];
        if (!class_exists('patI18n', false)) {
            return $url;
        }

        $lang   =   patI18n::getLocale(patI18n::LOCALE_TYPE_SHORT);
        if (empty($this->config['langmap'][$lang])) {
            return $url;
        }

        return $this->config['langmap'][$lang];
    }

    private function findTarget4Path($path)
    {
        if (empty($this->config['map'])) {
            return '';
        }

        foreach ($this->config['map'] as $l) {
            // exact match
            if ($l['path'] == $path) {
                return $l['url'];
            }
        }

        return '';
    }

    private function findTarget4Session()
    {
        if (empty($this->config['session'])) {
            return '';
        }

        if (!$this->sess->has($this->config['session'])) {
            return '';
        }
        $url    =   $this->sess->get($this->config['session']);
        $this->sess->clear($this->config['session']);
        return trim($url);
    }
}