<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Document
 *
 * @copyright   Copyright (C) 2005 - 2011 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

/**
 * JDocumentRenderer_RSS is a feed that implements RSS 2.0 Specification
 *
 * @package     Joomla.Platform
 * @subpackage  Document
 * @see         http://www.rssboard.org/rss-specification
 * @since       11.1
 */
class JDocumentRendererRSS extends JDocumentRenderer
{
    /**
     * Renderer mime type
     *
     * @var     string
     */
    private $_mime = "application/rss+xml";

    /**
     * Render the feed
     *
     * @return  string
     */
    public function render()
    {
        $app    = JFactory::getApplication();
        $now    = JFactory::getDate();
        $data   = &$this->_doc;

        $uri = JFactory::getURI();
        $url = $uri->toString(array('scheme', 'user', 'pass', 'host', 'port'));
        $syndicationURL = JRoute::_('&format=feed&type=rss');

        $feed_title = htmlspecialchars(
            $app->getCfg('sitename_pagetitles',0)?
            JText::sprintf('JPAGETITLE', $app->getCfg('sitename'), $data->title):
            $data->title
        , ENT_COMPAT, 'UTF-8');

        $feed = "<rss version=\"2.0\" xmlns:atom=\"http://www.w3.org/2005/Atom\">\n";
        $feed.= "   <channel>\n";
        $feed.= "       <title>".$feed_title."</title>\n";
        $feed.= "       <description>".$data->description."</description>\n";
        $feed.= "       <link>".str_replace(' ','%20',$url.$data->link)."</link>\n";
        $feed.= "       <lastBuildDate>".htmlspecialchars($now->toRFC822(), ENT_COMPAT, 'UTF-8')."</lastBuildDate>\n";
        $feed.= "       <generator>".$data->getGenerator()."</generator>\n";
        $feed.= '       <atom:link rel="self" type="application/rss+xml" href="'.str_replace(' ','%20',$url.$syndicationURL)."\"/>\n";

        if ($data->image!=null)
        {
            $feed.= "       <image>\n";
            $feed.= "           <url>".$data->image->url."</url>\n";
            $feed.= "           <title>".htmlspecialchars($data->image->title, ENT_COMPAT, 'UTF-8')."</title>\n";
            $feed.= "           <link>".str_replace(' ','%20',$data->image->link)."</link>\n";
            if ($data->image->width != "") {
                $feed.= "           <width>".$data->image->width."</width>\n";
            }
            if ($data->image->height!="") {
                $feed.= "           <height>".$data->image->height."</height>\n";
            }
            if ($data->image->description!="") {
                $feed.= "           <description><![CDATA[".$data->image->description."]]></description>\n";
            }
            $feed.= "       </image>\n";
        }
        if ($data->language!="") {
            $feed.= "       <language>".$data->language."</language>\n";
        }
        if ($data->copyright!="") {
            $feed.= "       <copyright>".htmlspecialchars($data->copyright,ENT_COMPAT, 'UTF-8')."</copyright>\n";
        }
        if ($data->editorEmail!="") {
            $feed.= "       <managingEditor>".htmlspecialchars($data->editorEmail, ENT_COMPAT, 'UTF-8').' ('.
                htmlspecialchars($data->editor, ENT_COMPAT, 'UTF-8').")</managingEditor>\n";
        }
        if ($data->webmaster!="") {
            $feed.= "       <webMaster>".htmlspecialchars($data->webmaster, ENT_COMPAT, 'UTF-8')."</webMaster>\n";
        }
        if ($data->pubDate!="") {
            $pubDate = JFactory::getDate($data->pubDate);
            $feed.= "       <pubDate>".htmlspecialchars($pubDate->toRFC822(),ENT_COMPAT, 'UTF-8')."</pubDate>\n";
        }
        if (empty($data->category) === false) {
            if (is_array($data->category)) {
                foreach ($data->category as $cat) {
                    $feed.= "       <category>".htmlspecialchars($cat, ENT_COMPAT, 'UTF-8')."</category>\n";
                }
            }
            else {
                $feed.= "       <category>".htmlspecialchars($data->category, ENT_COMPAT, 'UTF-8')."</category>\n";
            }
        }
        if ($data->docs!="") {
            $feed.= "       <docs>".htmlspecialchars($data->docs, ENT_COMPAT, 'UTF-8')."</docs>\n";
        }
        if ($data->ttl!="") {
            $feed.= "       <ttl>".htmlspecialchars($data->ttl, ENT_COMPAT, 'UTF-8')."</ttl>\n";
        }
        if ($data->rating!="") {
            $feed.= "       <rating>".htmlspecialchars($data->rating, ENT_COMPAT, 'UTF-8')."</rating>\n";
        }
        if ($data->skipHours!="") {
            $feed.= "       <skipHours>".htmlspecialchars($data->skipHours, ENT_COMPAT, 'UTF-8')."</skipHours>\n";
        }
        if ($data->skipDays!="") {
            $feed.= "       <skipDays>".htmlspecialchars($data->skipDays, ENT_COMPAT, 'UTF-8')."</skipDays>\n";
        }

        for ($i=0; $i<count($data->items); $i++)
        {
            if ((strpos($data->items[$i]->link, 'http://') === false) and (strpos($data->items[$i]->link, 'https://') === false)) {
                $data->items[$i]->link = str_replace(' ','%20',$url.$data->items[$i]->link);
            }
            $feed.= "       <item>\n";
            $feed.= "           <title>".htmlspecialchars(strip_tags($data->items[$i]->title), ENT_COMPAT, 'UTF-8')."</title>\n";
            $feed.= "           <link>".str_replace(' ','%20',$data->items[$i]->link)."</link>\n";

            if (empty($data->items[$i]->guid) === true) {
                $feed.= "           <guid isPermaLink=\"true\">".str_replace(' ','%20',$data->items[$i]->link)."</guid>\n";
            }
            else {
                $feed.= "           <guid isPermaLink=\"false\">".htmlspecialchars($data->items[$i]->guid, ENT_COMPAT, 'UTF-8')."</guid>\n";
            }

            $feed.= "           <description><![CDATA[".$this->_relToAbs($data->items[$i]->description)."]]></description>\n";

            if ($data->items[$i]->authorEmail!="") {
                $feed.= "           <author>".htmlspecialchars($data->items[$i]->authorEmail . ' (' .
                                        $data->items[$i]->author . ')', ENT_COMPAT, 'UTF-8')."</author>\n";
            }
            /*
            // on hold
            if ($data->items[$i]->source!="") {
                    $data.= "           <source>".htmlspecialchars($data->items[$i]->source, ENT_COMPAT, 'UTF-8')."</source>\n";
            }
            */
            if (empty($data->items[$i]->category) === false) {
                if (is_array($data->items[$i]->category)) {
                    foreach ($data->items[$i]->category as $cat) {
                        $feed.= "           <category>".htmlspecialchars($cat, ENT_COMPAT, 'UTF-8')."</category>\n";
                    }
                }
                else {
                    $feed.= "           <category>".htmlspecialchars($data->items[$i]->category, ENT_COMPAT, 'UTF-8')."</category>\n";
                }
            }
            if ($data->items[$i]->comments!="") {
                $feed.= "           <comments>".htmlspecialchars($data->items[$i]->comments, ENT_COMPAT, 'UTF-8')."</comments>\n";
            }
            if ($data->items[$i]->date!="") {
            $itemDate = JFactory::getDate($data->items[$i]->date);
                $feed.= "           <pubDate>".htmlspecialchars($itemDate->toRFC822(), ENT_COMPAT, 'UTF-8')."</pubDate>\n";
            }
            if ($data->items[$i]->enclosure != NULL)
            {
                    $feed.= "           <enclosure url=\"";
                    $feed.= $data->items[$i]->enclosure->url;
                    $feed.= "\" length=\"";
                    $feed.= $data->items[$i]->enclosure->length;
                    $feed.= "\" type=\"";
                    $feed.= $data->items[$i]->enclosure->type;
                    $feed.= "\"/>\n";
            }

            $feed.= "       </item>\n";
        }
        $feed.= "   </channel>\n";
        $feed.= "</rss>\n";
        return $feed;
    }

    /**
     * Convert links in a text from relative to absolute
     *
     * @return  string
     */
    public function _relToAbs($text)
    {
        $base = JURI::base();
        $text = preg_replace("/(href|src)=\"(?!http|ftp|https|mailto)([^\"]*)\"/", "$1=\"$base\$2\"", $text);

        return $text;
    }
}