<?php
/*  Feed2inc : RSS feed to PHP include file
	
	ABOUT
	This PHP code can be used as an include to provide the
	same functionality of our Feed2JS concept, but without
	the need to generate content via JavaScript
	
	Developed by Alan Levine 04.aug.2004
	http:/jade.mcli.dist.maricopa.edu/alan/
	
	This is a modified version of Fee22JS and merely replaces
	the output of Javascript to that for a PHP
	 
	USAGE:
	See http://jade.mcli.dist.maricopa.edu/feed/index.php?s=php
	
	
	Local customization can be achieved via declarations of CSS for
	  div.rssbox (style for bounding box)
	  class.rss_title (style for title of feed)
	  class.rss_item, class.rss_item a (style for linked entry)
	  class.rss_date (style for date display)
	
	HISTORY
	04.aug.2004
	- first version
	
	see the original feed2js for later changes
	
	
	This makes use of the Magpie RSS parser from
	 http://magpierss.sourceforge.net/
	 
	which should be downloaded and installed separately.
	
   ------------- small print ---------------------------------------
	GNU General Public License 
	Copyright (C) 2004 Alan Levine
	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details
	http://www.gnu.org/licenses/gpl.html
	------------- small print ---------------------------------------

*/


// Utility to remove return characters from strings that might
// pollute JavaScript commands. While we are at it, substitute 
// valid single quotes as well and get rid of any escaped quote
// characters
function strip_returns ($text) {
	$subquotes = ereg_replace("&apos;", "'", stripslashes($text));
	return ereg_replace("(\r\n|\n|\r)", " ", $subquotes);
}

// MAGPIE SETUP ----------------------------------------------------
// Define path to Magpie files and load library
// The easiest setup is to put the 4 Magpie include
// files in the same directory:
// define('MAGPIE_DIR', './')

// Otherwise, provide a full valid file path to the directory
// where magpie sites
define('MAGPIE_DIR', '/var/www/html/inc/');


// access magpie libraries
require_once(MAGPIE_DIR.'rss_fetch.inc');
require_once(MAGPIE_DIR.'rss_utils.inc');

// value of 2 optionally show lots of debugging info, 0 for production
define('MAGPIE_DEBUG', 0);

// Path to cache directory (must be writable permissions CHMOD 777)
// The simplest is a directory inside the location of this file

define('MAGPIE_CACHE_DIR', $MAGPIE_DIR . 'cache/');


// Define cache age in seconds.
define('MAGPIE_CACHE_AGE', 60*60);

// OTHER SETTIINGS ----------------------------------------------
// Output spec for item date string if used
// see http://www.php.net/manual/en/function.date.php
$date_format = "F d, Y h:i:s a";


// POSTED VARIABLES ---------------------------------------------
// note variables out to be declared and set in the PHP code prior
// to this include

// ERROR TRAP ---------------------------------------------------
// Check variables and set default values if needed

// trap for missing src param, divert to an error page
if (!$src) header("Location:nosource.php");

// flag to show channel info
if (!$chan) $chan = 'y';

// variable to limit number of displayed items; default = 0 (show all, 20 is a safe bet to list a big list of feeds)
if (!$num) $num = 20;

// indicator to show item description,  0 = no; 1=all; n>1 = characters to display
// (default=0)
if (!$desc) $desc = 0;

// flag to show date of posts, values: no/yes (default=no)
if (!$date) $date = 'n';


// flag to open target window in new window; no = same window, yes = new window,
// (default is yes)
if ($targ == 'y' ) {
	$target_window = "_blank";
} else {
	$target_window = "_self";
}


// PARSE FEED and GENERATE OUTPUT -------------------------------
// This is where it all happens!

// Fetch the data, thanks Magpie
$rss = fetch_rss( $src );

// begin javascript output string for channel info
$str = "<div class=\"rss_box\">\n";

if ($chan == 'y') {

	// output channel title and description	
	$str.= "<p class=\"rss_title\"><a class=\"rss_title\" href=\"" . $rss->channel['link'] . "\" target=\"" . $target_window . "\">" . strip_returns($rss->channel['title']) . "</a><br /><span class=\"rss_item\">" . strip_returns($rss->channel['description']) . "</span></p>\n";

} elseif ($chan == 'title') {
	// output title only
	$str.= "<p class=\"rss_title\"><a class=\"rss_title\" href=\"" . $rss->channel['link'] . "\" target=\"" . $target_window . "\">" . strip_returns($rss->channel['title']) . "</a></p>\n";

}	

// begin item listing
$str.= "<ul class=\"rss_items\">\n";


// test for feed that lacks any items (I guess it happens)
if (count($rss->items) == 0) {
	$str.= "<li class=\"rss_item\">No items available for this feed</li>\n";

} else {

	// Walk the items and process each one
	$all_items = array_slice($rss->items, 0, $num);
	
	foreach ( $all_items as $item ) {
		
		if ($item['link']) {
			// link url
			$my_url = addslashes($item['link']);
		}
		
		if ($item['title']) {
			// format item title
			$my_title = strip_returns($item['title']);
		} else {
			// place holder for items w/o titles
			$my_title = "&lt;no title&gt;";
		}
	
		// write the item
		$str.= "<li class=\"rss_item\"><a class=\"rss_item\" href=\"$my_url\"  target=\"" . $target_window . "\">" . $my_title . "</a>\n";
	
		// print out date if option indicated and feed returns a value. 
		// Thanks Rogers Cadenhead!
		if ($date == 'y') {
	
			$in_date = "";
			$rss_2_date = $item['pubdate'];
			$rss_1_date = $item['dc']['date'];
			$atom_date = $item['issued'];
			if ($atom_date != "") $in_date = parse_w3cdtf($atom_date);
			if ($rss_1_date != "") $in_date = parse_w3cdtf($rss_1_date);
			if ($rss_2_date != "") $in_date = strtotime($rss_2_date);
			if ($in_date == "") $in_date = time();	
			
			// format date
			
			if (strlen($rss_1_date) == 10) {
				// hack to catch dc:date in format 200x-XX-XX
				$pretty_date = date("F d, Y", strtotime($rss_1_date));
			} else {
				$pretty_date = date($date_format, $in_date);
			}
			
			
			$str.= "<br /><span class=\"rss_date\">posted on $pretty_date</span>\n"; 
		}
	
	
		// output description of item if desired
		if ($desc > 0) {
			if ($desc == 1) {
			
				// display the full description
				//$my_blurb = strip_tags ($item['summary']);
				
				$my_blurb = $item['summary'];
			} else {
			
				// display specified substring numbers of chars 
				$my_blurb = substr(strip_tags($item['summary']), 0, $desc) . '...';
			}
		
			$str.= "<br />" . strip_returns($my_blurb) . "\n"; 
		}
			
		$str.= "</li>\n";	
	}

}


$str .= "</ul></div>\n";
echo $str;

?>