<?php
define('RSS',1);
require_once('global.php');

$Rss_newnum=20;
$Rss_listnum=20;
$Rss_updatetime=10;

if ($tid) {
	$rs = $db->get_one("SELECT t.subject,t.fid,t.ptable,f.name,f.allowvisit,f.f_type FROM pw_threads t LEFT JOIN pw_forums f USING(fid) WHERE tid=".pwEscape($tid));
	if ($rs['allowvisit'] != '' || $rs['f_type'] == 'hidden') {
		echo "<META HTTP-EQUIV='Refresh' CONTENT='0; URL=rss.php'>";exit;
	}
	require_once(R_P.'require/rss.php');
	$title = substrs($rs['subject'],40);
	$channel = array(
		'title'			=>  $title,
		'link'			=>  "$db_bbsurl/read.php?tid=$tid",
		'description'	=>  "Latest $Rss_newnum replies of $title",
		'copyright'		=>  "Copyright(C) $db_bbsname",
		'generator'		=>  "PHPWind Forums by PHPWind Studio",
		'lastBuildDate' =>  date('r'),
	);
	$image = array(
		'url'		  =>  "$imgpath/rss.gif",
		'title'		  =>  'PHPWind Board',
		'link'		  =>  $db_bbsurl,
		'description' =>  $db_bbsname,
	);
	$Rss = new Rss(array('xml'=>"1.0",'rss'=>"2.0",'encoding'=>$db_charset));
	$Rss->channel($channel);
	$Rss->image($image);

	$pw_posts = GetPtable($rs['ptable']);
	$query = $db->query("SELECT pid,subject,author,postdate,anonymous,content FROM $pw_posts WHERE tid=".pwEscape($tid)." ORDER BY postdate DESC LIMIT $Rss_listnum");
	while ($rt = $db->fetch_array($query)) {
		$rt['content'] = preg_replace("/\[post\](.+?)\[\/post\]/is","",$rt['content']);
		$rt['content'] = preg_replace("/\[hide=(.+?)\](.+?)\[\/hide\]/is","",$rt['content']);
		$rt['content'] = preg_replace("/\[sell=(.+?)\](.+?)\[\/sell\]/is","",$rt['content']);
		$rt['content'] = substrs($rt['content'],300);
		$rt['anonymous'] && $rt['author'] = $db_anonymousname;
		$item = array(
			'title'       =>  $rt['subject'],
			'description' =>  $rt['content'],
			'link'        =>  "$db_bbsurl/read.php?tid=$tid#$rt[pid]",
			'author'      =>  $rt['author'],
			'category'    =>  strip_tags($rs['name']),
			'pubdate'     =>  date('r',$rt['postdate']),
		);
		$Rss->item($item);
	}
	$all = $Rss->rssHeader;
	$all .= $Rss->rssChannel;
	$all .= $Rss->rssImage;
	$all .= $Rss->rssItem;
	$all .= "</channel></rss>";
	header("Content-type: application/xml");
	echo $all;exit;
} else {
	$cache_path = D_P.'data/bbscache/rss_'.$fid.'_cache.xml';
	if ($timestamp-pwFilemtime($cache_path) > $Rss_updatetime*60) {
		require_once(R_P.'require/rss.php');
		require_once(D_P.'data/bbscache/forum_cache.php');
		if ($db_tlist) {
			@extract($db->get_one("SELECT MAX(tid) AS tid FROM pw_threads"));
			$pw_tmsgs = GetTtable($tid);
		}
		if ($fid) {
			$rt = $db->get_one("SELECT allowvisit,f_type FROM pw_forums WHERE fid=".pwEscape($fid));
			if ($rt['allowvisit'] != '' || $rt['f_type'] == 'hidden') {
				echo"<META HTTP-EQUIV='Refresh' CONTENT='0; URL=rss.php'>";exit;
			}
		}
		$sql = $forceindex = '';
		if ($fid) {
			$description = "Latest $Rss_newnum article of ".$forum[$fid]['name'];
			$sql = "WHERE t.fid=".pwEscape($fid)."AND ifcheck=1 AND topped='0' AND lastpost>".pwEscape($timestamp-604800)." ORDER BY lastpost DESC LIMIT $Rss_listnum";
		} else {
			$fids  = $extra = '';
			$query = $db->query("SELECT fid FROM pw_forums WHERE allowvisit='' AND f_type!='hidden'");
			while ($rt = $db->fetch_array($query)) {
				$fids .= $extra."'".$rt['fid']."'";
				$extra = ',';
			}
			$description = "Latest $Rss_newnum article of all forums";
			if ($fids) {
				$sql = "WHERE fid IN($fids) AND ifcheck=1 AND topped='0' AND postdate>".pwEscape($timestamp-604800)." ORDER BY postdate DESC LIMIT $Rss_newnum";
				$forceindex = 'FORCE INDEX (postdate)';
			}
		}
		$channel = array(
			'title'			=>  $db_bbsname,
			'link'			=>  $db_bbsurl,
			'description'	=>  $description,
			'copyright'		=>  "Copyright(C) $db_bbsname",
			'generator'		=>  "PHPWind Forums by PHPWind Studio",
			'lastBuildDate' =>  date('r'),
		);
		$image = array(
			'url'		  =>  "$imgpath/rss.gif",
			'title'		  =>  'PHPWind Board',
			'link'		  =>  $db_bbsurl,
			'description' =>  $db_bbsname,
		);
		$Rss = new Rss(array('xml'=>"1.0",'rss'=>"2.0",'encoding'=>$db_charset));
		$Rss->channel($channel);
		$Rss->image($image);
		if ($sql) {
			$query = $db->query("SELECT t.tid,t.fid,t.subject,t.author,t.postdate,t.anonymous,tm.content FROM pw_threads t $forceindex RIGHT JOIN $pw_tmsgs tm ON tm.tid=t.tid $sql");
			while ($rt = $db->fetch_array($query)) {
				$rt['content'] = preg_replace("/\[post\](.+?)\[\/post\]/is","",$rt['content']);
				$rt['content'] = preg_replace("/\[hide=(.+?)\](.+?)\[\/hide\]/is","",$rt['content']);
				$rt['content'] = preg_replace("/\[sell=(.+?)\](.+?)\[\/sell\]/is","",$rt['content']);
				$rt['content'] = substrs($rt['content'],300);
				$rt['anonymous'] && $rt['author'] = $db_anonymousname;
				$item = array(
					'title'       => $rt['subject'],
					'description' => $rt['content'],
					'link'        => "$db_bbsurl/read.php?tid=$rt[tid]",
					'author'      => $rt['author'],
					'category'    => $forum[$rt['fid']]['name'],
					'pubdate'     => date('r',$rt['postdate']),
				);
				$Rss->item($item);
			}
		}
		$Rss->generate($cache_path);
	}
	header("Content-type: application/xml");
	@readfile($cache_path);
	exit;
}
?>