/components/com_rss/rss.php

<?php
/**
* @version $Id: rss.php 10002 2008-02-08 10:56:57Z willebil $
* @package Joomla
* @subpackage Syndicate
* @copyright Copyright (C) 2005 Open Source Matters. All rights reserved.
* @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/

// no direct access
defined( '_VALID_MOS' ) or die( 'Restricted access' );

// load feed creator class
require_once( $mosConfig_absolute_path .'/includes/feedcreator.class.php' );

$info	=	null;
$rss	=	null;

switch ( $task ) {
	case 'live_bookmark':
		feedFrontpage( false );
		break;

	default:
		feedFrontpage( true );
		break;
}

/*
* Creates feed from Content Iems associated to teh frontpage component
*/
function feedFrontpage( $showFeed ) {
	global $database, $mainframe;
	global $mosConfig_live_site, $mosConfig_cachepath;

	$nullDate = $database->getNullDate();
	// pull id of syndication component
	$query = "SELECT a.id"
	. "\n FROM #__components AS a"
	. "\n WHERE ( a.admin_menu_link = 'option=com_syndicate' OR a.admin_menu_link = 'option=com_syndicate&hidemainmenu=1' )"
	. "\n AND a.option = 'com_syndicate'"
	;
	$database->setQuery( $query );
	$id = $database->loadResult();

	// load syndication parameters
	$component = new mosComponent( $database );
	$component->load( (int)$id );
	$params = new mosParameters( $component->params );

	// test if security check is enbled
	$check = $params->def( 'check', 1 );
	if($check) {
		// test if rssfeed module is published
		// if not disable access
		$query = "SELECT m.id"
		. "\n FROM #__modules AS m"
		. "\n WHERE m.module = 'mod_rssfeed'"
		. "\n AND m.published = 1"
		;
		$database->setQuery( $query );
		$check = $database->loadResultArray();
		if(empty($check)) {
			mosNotAuth();
			return;		
		}			
	}
	
	$now 	= _CURRENT_SERVER_TIME;
	$iso 	= split( '=', _ISO );

	// parameter intilization
	$info[ 'date' ] 			= date( 'r' );
	$info[ 'year' ] 			= date( 'Y' );
	$info[ 'encoding' ] 		= $iso[1];
	$info[ 'link' ] 			= htmlspecialchars( $mosConfig_live_site );
	$info[ 'cache' ] 			= $params->def( 'cache', 1 );
	$info[ 'cache_time' ] 		= $params->def( 'cache_time', 3600 );
	$info[ 'count' ]			= $params->def( 'count', 5 );
	$info[ 'orderby' ] 			= $params->def( 'orderby', '' );
	$info[ 'title' ] 			= $params->def( 'title', 'Joomla! powered Site' );
	$info[ 'description' ] 		= $params->def( 'description', 'Joomla! site syndication' );
	$info[ 'image_file' ]		= $params->def( 'image_file', 'joomla_rss.png' );
	if ( $info[ 'image_file' ] == -1 ) {
		$info[ 'image' ]		= NULL;
	} else{
		$info[ 'image' ]		= $mosConfig_live_site .'/images/M_images/'. $info[ 'image_file' ];
	}
	$info[ 'image_alt' ] 		= $params->def( 'image_alt', 'Powered by Joomla!' );
	$info[ 'limit_text' ] 		= $params->def( 'limit_text', 0 );
	$info[ 'text_length' ] 		= $params->def( 'text_length', 20 );
	// get feed type from url
	$info[ 'feed' ] 			= strval( mosGetParam( $_GET, 'feed', 'RSS2.0' ) );
	// live bookmarks
	$info[ 'live_bookmark' ]	= $params->def( 'live_bookmark', '' );
	$info[ 'bookmark_file' ]	= $params->def( 'bookmark_file', '' );

	// set filename for live bookmarks feed
	if ( !$showFeed & $info[ 'live_bookmark' ] ) {
		if ( $info[ 'bookmark_file' ] ) {
		// custom bookmark filename
			$filename = $info[ 'bookmark_file' ];
		} else {
		// standard bookmark filename
			$filename = $info[ 'live_bookmark' ];
		}
	} else {
	// set filename for rss feeds
		$info[ 'file' ] = strtolower( str_replace( '.', '', $info[ 'feed' ] ) );
		
		// security check to limit arbitrary file creation.
		// and to allow disabling/enabling of selected feed types
		switch ( $info[ 'file' ] ) {
			case 'rss091':			
				if ( !$params->get( 'rss091', 1 ) ) {
					echo _NOT_AUTH;
					return;
				}
				break;

			case 'rss10':			
				if ( !$params->get( 'rss10', 1 ) ) {
					echo _NOT_AUTH;
					return;
				}
				break;
			
			case 'rss20':			
				if ( !$params->get( 'rss20', 1 ) ) {
					echo _NOT_AUTH;
					return;
				}
				break;
			
			case 'atom03':			
				if ( !$params->get( 'atom03', 1 ) ) {
					echo _NOT_AUTH;
					return;
				}
				break;
			
			case 'opml':			
				if ( !$params->get( 'opml', 1 ) ) {
					echo _NOT_AUTH;
					return;
				}
				break;
			
			
			default:
				echo _NOT_AUTH;
				return;
				break;			
		}
	}
	$filename = $info[ 'file' ] .'.xml';
	
	// security check to stop server path disclosure
	if ( strstr( $filename, '/' ) ) { 
		echo _NOT_AUTH;
		return;
	}
	$info[ 'file' ] = $mosConfig_cachepath .'/'. $filename;

	// load feed creator class
	$rss 	= new UniversalFeedCreator();
	// load image creator class
	$image 	= new FeedImage();

	// loads cache file
	if ( $showFeed && $info[ 'cache' ] ) {
		$rss->useCached( $info[ 'feed' ], $info[ 'file' ], $info[ 'cache_time' ] );
	}

	$rss->title 			= $info[ 'title' ];
	$rss->description 		= $info[ 'description' ];
	$rss->link 				= $info[ 'link' ];
	$rss->syndicationURL 	= $info[ 'link' ];
	$rss->cssStyleSheet 	= NULL;
	$rss->encoding 			= $info[ 'encoding' ];

	if ( $info[ 'image' ] ) {
		$image->url 		= $info[ 'image' ];
		$image->link 		= $info[ 'link' ];
		$image->title 		= $info[ 'image_alt' ];
		$image->description	= $info[ 'description' ];
		// loads image info into rss array
		$rss->image 		= $image;
	}

	// Determine ordering for sql
	switch ( strtolower( $info[ 'orderby' ] ) ) {
		case 'date':
			$orderby = 'a.created';
			break;

		case 'rdate':
			$orderby = 'a.created DESC';
			break;

		case 'alpha':
			$orderby = 'a.title';
			break;

		case 'ralpha':
			$orderby = 'a.title DESC';
			break;

		case 'hits':
			$orderby = 'a.hits DESC';
			break;

		case 'rhits':
			$orderby = 'a.hits ASC';
			break;

		case 'front':
			$orderby = 'f.ordering';
			break;

		default:
			$orderby = 'f.ordering';
			break;
	}

	// query of frontpage content items
	$query = "SELECT a.*, u.name AS author, u.usertype, UNIX_TIMESTAMP( a.created ) AS created_ts, cat.title AS cat_title, sec.title AS section_title"
	. "\n FROM #__content AS a"
	. "\n INNER JOIN #__content_frontpage AS f ON f.content_id = a.id"
	. "\n LEFT JOIN #__users AS u ON u.id = a.created_by"	
	. "\n LEFT JOIN #__categories AS cat ON cat.id = a.catid"
	. "\n LEFT JOIN #__sections AS sec ON sec.id = a.sectionid"
	. "\n WHERE a.state = 1"
	. "\n AND cat.published = 1"
	. "\n AND sec.published = 1"
	. "\n AND a.access = 0"
	. "\n AND cat.access = 0"
	. "\n AND sec.access = 0"
	. "\n AND ( a.publish_up = " . $database->Quote( $nullDate ) . " OR a.publish_up <= " . $database->Quote( $now ) . " )"
	. "\n AND ( a.publish_down = " . $database->Quote( $nullDate ) . " OR a.publish_down >= " . $database->Quote( $now ) . " )"
	. "\n ORDER BY $orderby"
	;
	$database->setQuery( $query, 0, $info[ 'count' ] );
	$rows = $database->loadObjectList();

	foreach ( $rows as $row ) {
		// title for particular item
		$item_title = htmlspecialchars( $row->title );
		$item_title = html_entity_decode( $item_title );

		// url link to article
		// & used instead of &amp; as this is converted by feed creator
		$_Itemid	= '';
		$itemid 	= $mainframe->getItemid( $row->id );
		if ($itemid) {
			$_Itemid = '&Itemid='. $itemid;
		}
		
		$item_link = 'index.php?option=com_content&task=view&id='. $row->id . $_Itemid;
		$item_link = sefRelToAbs( $item_link );

		// removes all formating from the intro text for the description text
		$item_description = $row->introtext;
		$item_description = mosHTML::cleanText( $item_description );
		$item_description = html_entity_decode( $item_description );
		if ( $info[ 'limit_text' ] ) {
			if ( $info[ 'text_length' ] ) {
				// limits description text to x words
				$item_description_array = split( ' ', $item_description );
				$count = count( $item_description_array );
				if ( $count > $info[ 'text_length' ] ) {
					$item_description = '';
					for ( $a = 0; $a < $info[ 'text_length' ]; $a++ ) {
						$item_description .= $item_description_array[$a]. ' ';
					}
					$item_description = trim( $item_description );
					$item_description .= '...';
				}
			} else  {
				// do not include description when text_length = 0
				$item_description = NULL;
			}
		}

		// load individual item creator class
		$item = new FeedItem();
		// item info
		$item->title 		= $item_title;
		$item->link 		= $item_link;
		$item->description 	= $item_description;
		$item->source 		= $info[ 'link' ];
		$item->date			= date( 'r', $row->created_ts );
		$item->category     = $row->section_title . ' - ' . $row->cat_title;

		// loads item info into rss array
		$rss->addItem( $item );
	}

	// save feed file
	$rss->saveFeed( $info[ 'feed' ], $info[ 'file' ], $showFeed );
}
?>