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

/**
 * Load required class
 */
WBClass::load( 'WBContent'
            , 'WBCache'
            , 'WBStream' );

/**
 * Content component: Rss
 *
 * RSS Feed reader
 *
 * @version 0.2.6
 * @package WB
 * @subpackage content
 */
class WBContent_Rss extends WBContent
{
   /**
    * my parameter list
    * @var array
    */
    protected $config = array(
            'tmpl'  =>  'list',
            'url'   =>  '',
            'limit' =>  100,
            'ttl'   =>  300
        );

   /**
    * channel data
    * @var array
    */
    protected $channel = array();

   /**
    * run
    *
    * run component
    *
    * @todo remove wget hack!
    * @return array parameter list
    */
    public function run()
    {
        $cacheId        =   serialize($this->config);
        $this->channel  =   WBCache::get($cacheId);
        if (is_array($this->channel)) {
            return $this->config;
        }

        try{
            $stream    =    WBStream::open( $this->config['url'], 'r' );
        } catch(WBException_File $e) {
            return $this->config;
        }

        // initialize channel info
        $this->channel    =   array(
                            'info'  =>  array(),
                            'items' =>  array()
                        );

        WBClass::load('XML_RSS');
        $rss    =   new XML_RSS($stream);
        $rss->parse();

        $items  =   array();
        foreach( $rss->getItems() as $item ) {

            // only fetch a few
            if (count($items) >= $this->config['limit']) {
                break;
            }

            if (isset($item['dc:creator'])) {
                $item['author'] =   $item['dc:creator'];
            }
            if (isset($item['dc:date'])) {
                $item['pubdate'] =   $item['dc:date'];
            }

            $item['timestamp']  = 0;
            if (isset( $item['pubdate'])) {
                $item['timestamp']  =   strtotime($item['pubdate']);
            }

            $items[]    =   $item;
        }
        $this->channel['info']  =  $rss->getChannelInfo();
        $this->channel['items'] =  $items;
        $expire =   array(
                        'ttl'   =>  $this->config['ttl'],
                    );

        WBCache::set($cacheId, $this->channel, $expire);
        return $this->config;
    }

   /**
    * receive output
    *
    * fetch output of this content component
    *
    * @return string
    */
    public function getString()
    {
        if (empty($this->channel)) {
            $this->loadTemplates('broken');
            $this->tmpl->addGLobalVars($this->config, 'config_');
            return $this->tmpl->getParsedTemplate('snippet');
        }

        $this->loadTemplates($this->config['tmpl']);
        $this->tmpl->addGlobalVars($this->channel['info'], 'channel_');
        $this->tmpl->addRows('item', $this->channel['items']);

        return $this->tmpl->getParsedTemplate('snippet');
    }
}
?>