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

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

/**
 * Content component: SEO
 *
 * @version 1.2.0
 * @package WB
 * @subpackage content
 */
class WBContent_SEO_Robots extends WBContent_SEO
{
    /**
     * My Parameter List
     * @var array
     */
    protected $config = array(
                                'disallow'      =>  '',
                                'checkorigin'   =>  1,
                                'originhost'    =>  ''
                            );
    /**
     * run
     *
     * run component
     *
     * @see sendAndExit()
     * @return array parameter list
     */
    public function run()
    {
        $cnt    =   array('User-agent: *');

        if (0 < $this->config['checkorigin']) {

            if (empty($this->config['originhost'])) {
                /** @var WBConfig */
                $conf   =   WBClass::create('WBConfig');
                $conf->load('config');
                $this->config['originhost'] =   $conf->get('page/server');
            }

            $host   =   $this->req->getMeta('HTTP_HOST');
            if ($host != $this->config['originhost']) {
                $cnt[]  =   'Disallow: /';
                $this->res->add(implode("\n", $cnt));
                $this->sendAndExit('text/plain');
            }
        }

        if (!is_array($this->config['disallow'])) {
            $this->config['disallow']   =   trim($this->config['disallow']);
            if (empty($this->config['disallow'])) {
                $this->config['disallow']   =   array();
            }
            else {
                $this->config['disallow']   =   array($this->config['disallow']);
            }
        }
        foreach ($this->config['disallow'] as $line) {
            $line   =   trim($line);
            if (empty($line)) {
                continue;
            }
            $cnt[]  =   sprintf('Disallow: %s', $line);
        }

        $this->res->add(implode("\n", $cnt));
        $this->sendAndExit('text/plain');
    }
}