<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Document
 *
 * @copyright   Copyright (C) 2005 - 2012 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
	 * @since  11.1
	 */
	protected $_mime = "application/rss+xml";

	/**
	 * Render the feed.
	 *
	 * @param   string  $name     The name of the element to render
	 * @param   array   $params   Array of values
	 * @param   string  $content  Override the output of the renderer
	 *
	 * @return  string  The output of the script
	 *
	 * @see JDocumentRenderer::render()
	 * @since   11.1
	 */
	public function render($name = '', $params = null, $content = null)
	{
		$app = JFactory::getApplication();

		// Gets and sets timezone offset from site configuration
		$tz = new DateTimeZone($app->getCfg('offset'));
		$now = JFactory::getDate();
		$now->setTimeZone($tz);

		$data = $this->_doc;

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

		if ($app->getCfg('sitename_pagetitles', 0) == 1)
		{
			$title = JText::sprintf('JPAGETITLE', $app->getCfg('sitename'), $data->title);
		}
		elseif ($app->getCfg('sitename_pagetitles', 0) == 2)
		{
			$title = JText::sprintf('JPAGETITLE', $data->title, $app->getCfg('sitename'));
		}
		else
		{
			$title = $data->title;
		}

		$feed_title = htmlspecialchars($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(true), 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);
			$pubDate->setTimeZone($tz);
			$feed .= "		<pubDate>" . htmlspecialchars($pubDate->toRFC822(true), 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, $count = count($data->items); $i < $count; $i++)
		{
			if ((strpos($data->items[$i]->link, 'http://') === false) && (strpos($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";
			}

			/*
			 * @todo: 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);
				$itemDate->setTimeZone($tz);
				$feed .= "			<pubDate>" . htmlspecialchars($itemDate->toRFC822(true), 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
	 *
	 * @param   string  $text  The text processed
	 *
	 * @return  string   Text with converted links
	 *
	 * @since   11.1
	 */
	public function _relToAbs($text)
	{
		$base = JURI::base();
		$text = preg_replace("/(href|src)=\"(?!http|ftp|https|mailto|data)([^\"]*)\"/", "$1=\"$base\$2\"", $text);

		return $text;
	}
}
