<?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_Atom is a feed that implements the atom specification
 *
 * Please note that just by using this class you won't automatically
 * produce valid atom files. For example, you have to specify either an editor
 * for the feed or an author for every single feed item.
 *
 * @package     Joomla.Platform
 * @subpackage  Document
 * @see http://www.atomenabled.org/developers/syndication/atom-format-spec.php
 * @since   11.1
 */

 class JDocumentRendererAtom extends JDocumentRenderer
 {
    /**
     * Document mime type
     *
     * @var     string
     */
    private $_mime = "application/atom+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=atom');

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

        $feed = "<feed xmlns=\"http://www.w3.org/2005/Atom\" ";
        if ($data->language!="") {
            $feed.= " xml:lang=\"".$data->language."\"";
        }
        $feed.= ">\n";
        $feed.= "   <title type=\"text\">".$feed_title."</title>\n";
        $feed.= "   <subtitle type=\"text\">".htmlspecialchars($data->description, ENT_COMPAT, 'UTF-8')."</subtitle>\n";
        if (empty($data->category) === false) {
            if (is_array($data->category)) {
                foreach ($data->category as $cat) {
                    $feed.= "   <category term=\"".htmlspecialchars($cat, ENT_COMPAT, 'UTF-8')."\" />\n";
                }
            }
            else {
                $feed.= "   <category term=\"".htmlspecialchars($data->category, ENT_COMPAT, 'UTF-8')."\" />\n";
            }
        }
        $feed.= "   <link rel=\"alternate\" type=\"text/html\" href=\"".$url."\"/>\n";
        $feed.= "   <id>".str_replace(' ','%20',$data->getBase())."</id>\n";
        $feed.= "   <updated>".htmlspecialchars($now->toISO8601(), ENT_COMPAT, 'UTF-8')."</updated>\n";
        if ($data->editor!="") {
            $feed.= "   <author>\n";
            $feed.= "       <name>".$data->editor."</name>\n";
            if ($data->editorEmail!="") {
                $feed.= "       <email>".htmlspecialchars($data->editorEmail, ENT_COMPAT, 'UTF-8')."</email>\n";
            }
            $feed.= "   </author>\n";
        }
        $feed.= "   <generator uri=\"http://joomla.org\" version=\"1.6\">".$data->getGenerator()."</generator>\n";
        $feed.= '   <link rel="self" type="application/atom+xml" href="'.str_replace(' ','%20',$url.$syndicationURL)."\"/>\n";

        for ($i=0;$i<count($data->items);$i++)
        {
            $feed.= "   <entry>\n";
            $feed.= "       <title>".htmlspecialchars(strip_tags($data->items[$i]->title), ENT_COMPAT, 'UTF-8')."</title>\n";
            $feed.= '       <link rel="alternate" type="text/html" href="'.$url.$data->items[$i]->link."\"/>\n";

            if ($data->items[$i]->date=="") {
                $data->items[$i]->date = $now->toUnix();
            }
            $itemDate = JFactory::getDate($data->items[$i]->date);
            $feed.= "       <published>".htmlspecialchars($itemDate->toISO8601(), ENT_COMPAT, 'UTF-8')."</published>\n";
            $feed.= "       <updated>".htmlspecialchars($itemDate->toISO8601(),ENT_COMPAT, 'UTF-8')."</updated>\n";
            if (empty($data->items[$i]->guid) === true) {
                $feed.= "       <id>".str_replace(' ', '%20', $url.$data->items[$i]->link)."</id>\n";
            }
            else {
                $feed.= "       <id>".htmlspecialchars($data->items[$i]->guid, ENT_COMPAT, 'UTF-8')."</id>\n";
            }

            if ($data->items[$i]->author!="")
            {
                $feed.= "       <author>\n";
                $feed.= "           <name>".htmlspecialchars($data->items[$i]->author, ENT_COMPAT, 'UTF-8')."</name>\n";
                if ($data->items[$i]->authorEmail!="") {
                    $feed.= "           <email>".htmlspecialchars($data->items[$i]->authorEmail, ENT_COMPAT, 'UTF-8')."</email>\n";
                }
                $feed.= "       </author>\n";
            }
            if ($data->items[$i]->description!="") {
                $feed.= "       <summary type=\"html\">".htmlspecialchars($data->items[$i]->description, ENT_COMPAT, 'UTF-8')."</summary>\n";
                $feed.= "       <content type=\"html\">".htmlspecialchars($data->items[$i]->description, ENT_COMPAT, 'UTF-8')."</content>\n";
            }
            if (empty($data->items[$i]->category) === false) {
                if (is_array($data->items[$i]->category)) {
                    foreach ($data->items[$i]->category as $cat) {
                        $feed.= "       <category term=\"".htmlspecialchars($cat, ENT_COMPAT, 'UTF-8')."\" />\n";
                    }
                }
                else {
                    $feed.= "       <category term=\"".htmlspecialchars($data->items[$i]->category, ENT_COMPAT, 'UTF-8')."\" />\n";
                }
            }
            if ($data->items[$i]->enclosure != NULL) {
            $feed.="        <link rel=\"enclosure\" href=\"". $data->items[$i]->enclosure->url ."\" type=\"". $data->items[$i]->enclosure->type."\"  length=\"". $data->items[$i]->enclosure->length . "\" />\n";
            }
            $feed.= "   </entry>\n";
        }
        $feed.= "</feed>\n";
        return $feed;
    }
}