index.php

<?php
/* TODO
manage hidden drafts (.title)
themes
macros : html, ??
configuration
//*/
$_sw['login']='changethis';
$_sw['pwd']='changethis';
$_sw['title']='WikiTitle';
$_sw['default']='Accueil';
@include(dirname(__FILE__).'/inc.php');//include a side file (storing parameters for instance)
/***************************************/
$a = array();
preg_match('~^([:\.]?[\w \',!]+)/?([\w\.]*)/?([\d-]*)/?(.*)~', urldecode($_SERVER['QUERY_STRING']), $a); // $page/$mode/$version/$action, leading ':' for special pages
$p = count($a)>0?$a[1]:$_sw['default'];$p=ucfirst($p);//page
$p = preg_replace('/^_/',':',$p);//editable special pages dirty fix
$m = count($a)>1?$a[2]:'';//mode (can be '', 'edit' or 'history')
$v = count($a)>2?$a[3]:'';//version
$d = count($a)>3?$a[4]:'';//action (can be 'set' or 'delete')
$s = (basename(__FILE__)=='index.php')?'':basename(__FILE__);

if(isset($_COOKIE['PHPSESSID']) || $m=='edit' || $m=='history') // we only want a session if we already have one of if we need one.
	session_start();

/* special pages *************************/
if(substr($p,0,1)==':') { //special pages
	if ($p==':all') {
		swSpecialAll();
	}
	if ($p==':last') {
		swSpecialLast();
	}
	if ($p==':blog') {
		swSpecialBlog();
	}
	if ($p==':rss') {
		swSpecialRss();
	}
	if ($p==':search') {
		swSpecialSearch();
	}
	die;
}
/* standard pages *************************/
if ($m=='') {
	swDisplay();
} elseif ($m=='edit') {//edit
	swEdit();
} elseif ($m=='history') { //history
	swHistory();
}
else {//pj?
	$pjs=swGetAttachedFiles($p);
	if(isset($pjs[$p.'/'.$m])) {
		header('Location: '.'./pages/'.$p.'/'.$m.'.'.$pjs[$p.'/'.$m][0]);
	}
}
/* functions **************************/
function txt2html($txt,$page='') {
	global $s,$p,$cp,$fn,$fnc;
	$cp=$page;
	$r='';
	$txt = htmlentities($txt);
	$lines = explode("\n",$txt);
	$previous = '';
	$emptyprev=true;
	$fnc=0;
	$fn='';
	foreach($lines as $line) {
		$line=str_replace("\r",'',$line);
		if (substr($line, 0, 1)==' ') {$current = 'pre';$line=substr($line,1);}
		elseif (substr($line, 0, 1)=='*') {$current = 'ul';$line=substr($line,1);}
		elseif (substr($line, 0, 1)=='#') {$current = 'ol';$line=substr($line,1);}
		elseif (substr($line, 0, 1)=='\\') {$current = 'p';$line=substr($line,1);}
		elseif (substr($line, 0, 4)=='&gt;') {$current = 'quote';$line=substr($line,4);}
		else $current='p';

		if ($previous=='')
			$r.= '<'.$current.'>';
		if ($current!=$previous && $previous != '')
			$r.= '</'.$previous.'>'."\n".'<'.$current.'>'."\n";
		if ($line=='' && !$emptyprev) {
			$r.= '</'.$previous.'>'."\n".'<'.$current.'>';
			$emptyprev = true;
		}
		if($line!='') $emptyprev=false;
		$previous=$current;
		
		if ($current!='pre') {
			$line = preg_replace('/[ ]+([:?!;](\s|$))/','&nbsp;$1',$line);
			$line = preg_replace('/1(st|er|&egrave;re|ere)\b/','1<sup>$1</sup>',$line);
			$line = preg_replace('/2(nd|&egrave;me|eme)\b/','2<sup>$1</sup>',$line);
			$line = preg_replace('/3(rd|&egrave;me|eme)\b/','3<sup>$1</sup>',$line);
			$line = preg_replace('/([014-9])(th|&egrave;me|eme)\b/','$1<sup>$2</sup>',$line);
			$line = preg_replace('/^[-=]{4}[-= ]*$/U', '<hr/>', $line);
			$line = preg_replace('/--(.*)--/U', '<del>$1</del>', $line);
			$line = preg_replace('/\+\+(.*)\+\+/U', '<ins>$1</ins>', $line);
			$line = preg_replace("/''(.*)''/U", '<em>$1</em>', $line);
			$line = preg_replace('/__(.*)__/U', '<strong>$1</strong>', $line);
			$line = preg_replace('/@@(.*)@@/U', '<code>$1</code>', $line);
			$line = preg_replace('/{{(.*)}}/U', '<q>$1</q>', $line);
			$line = preg_replace('/!!!(.*)!!!/U', '</'.$previous.'>'."\n".'<h2>$1</h2>'."\n".'<'.$current.'>', $line);
			$line = preg_replace('/!!(.*)!!/U', '</'.$previous.'>'."\n".'<h3>$1</h3>'."\n".'<'.$current.'>', $line);
			$line = preg_replace('/!(.*)!/U', '</'.$previous.'>'."\n".'<h4>$1</h4>'."\n".'<'.$current.'>', $line);
			$line = preg_replace('/\?\?([^\|]+)\|(.*)\?\?/U', '<acronym title="$2">$1</acronym>', $line);
			$line = preg_replace_callback('/\$\$(.*)\$\$/U','footnote',$line);
			$line = preg_replace_callback('/\(\(([^|]+\.(png|jpg|gif))\|?([^|]*)?\|?([^|]*)?\)\)/Ui', 'img', $line);
			$line = preg_replace_callback('/\[([^\|]+)(\|.*)?\]/U', 'url', $line);
		}
		if ($current=='ul' || $current=='ol') $r.= '	<li>'.$line.'</li>'."\n";
		else $r.= ' '.$line."\n";
	}
	$r.= '</'.$previous.'>'."\n";
	if ($fn!='') $r.='<ul id="fn">'.$fn.'</ul>';
	return $r;
}
function img($m) {
	global $cp;
	if(!preg_match('~https?://~',$m[1])) {//internal picture
		if(strpos($m[1],'/')) list($p,$img)=explode('/',$m[1]);
		else {global $p;$img=$m[1];}
		if($cp!='') $p=$cp;
		$pjs=swGetAttachedFiles($p);
		return '<a class="img" alt="'.$m[3].'" title="'.$m[3].'" href="./pages/'.$p.'/'.$img.'.'.$pjs[$p.'/'.$img][0].'">'.
					'<img alt="'.$m[3].'" title="'.$m[3].'" src="./pages/'.$p.'/'.$img.'.'.$pjs[$p.'/'.$img][0].'" style="max-height:'.$m[4].'px;max-width:'.$m[4].'px;"/>'.
				'</a>';
	} else {// external picture
		return '<img alt="'.$m[3].'" title="'.$m[3].'" src="'.$m[1].'" style="max-height:'.$m[4].'px;max-width:'.$m[4].'px;"/>';
	}
}
function url($m) {
	global $s,$p;
	if(isset($m[2])) {$url=substr($m[2],1);$title=$m[1];}//title present
	else $url=$title=$m[1];
	if (preg_match('/^#/',$url)) $url=$p.$url;
	if(preg_match('~^([:\.]?[\w \'!#\./]+)$~',$url)) $url=$s.'?'.$url;
	return '<a href="'.$url.'">'.$title.'</a>';
}
function footnote($m) {
	global $fn,$fnc;
	$fnc++;
	$fn.='<li><sup><a href="#fno'.$fnc.'">'.$fnc.'</a></sup> <a name="fn'.$fnc.'">'.$m[1].'</a></li>';
	return '<sup><a href="#fn'.$fnc.'" name="fno'.$fnc.'">'.$fnc.'</a></sup>';
}
function swSave($p,$c) {
	if (!file_exists(dirname(__FILE__).'/pages'))
		mkdir(dirname(__FILE__).'/pages');
	if (!file_exists(dirname(__FILE__).'/pages/'.$p))
		mkdir(dirname(__FILE__).'/pages/'.$p);
	$gz = gzopen(dirname(__FILE__).'/pages/'.$p.'/'.date('Ymd-His').'.gz','w9');
	gzwrite($gz, $_POST['c']);
	gzclose($gz);
}
function swGet($p,$v='') {
	if($v!='') $c = implode("", gzfile(dirname(__FILE__).'/pages/'.$p.'/'.$v.'.gz'));
	else {
		$a = glob(dirname(__FILE__).'/pages/'.$p.'/*.gz');
		if(count($a)>0) {
			rsort($a);
			$c = implode("", gzfile($a[0]));
		}
		else $c='';
	}
	return stripslashes($c);
}
function swSet($p,$v) {///restore an old version
	$d=dirname(__FILE__).'/pages/'.$p.'/';
	copy($d.$v.'.gz',$d.date('Ymd-His').'.gz');
}
function swDel($p,$v) {//delete a version
	global $s;
	$d=dirname(__FILE__).'/pages/'.$p.'/';
	unlink($d.$v.'.gz');
	if (count(scandir($d))==2) rmdir($d);
	header('Location: '.$s.'?'.$p.'/history');
}
function swVersions($p) {
	$a = glob(dirname(__FILE__).'/pages/'.$p.'/*.gz');
	$a = array_map('removeGz',array_map('basename', $a));
	rsort($a);
	return $a;
}
function removeDirname($str) {
	return str_replace(dirname(__FILE__).'/pages/','',$str);
}
function removeGz($str) {return str_replace('.gz','',$str);}
function swFooter() {
	global $s,$p, $_sw;
	echo '<ul id="footer">'."\n";
	echo '<li><a href="./'.$s.'">'.$_sw['title'].'</a></li>'."\n";
	if (isAuth() && substr($p,0,1)!=':'){
		echo '<li><a href="'.$s.'?'.$p.'/history">history</a></li>'."\n";
	}
	echo '<li><a href="'.$s.'?'.':all">all</a></li>'."\n";
	echo '<li><a href="'.$s.'?'.':last">last</a></li>'."\n";
	// echo '<li><a href="'.$s.'?'.':blog">blog</a></li>'."\n";
	echo '<li><form method="post" action="'.$s.'?:search"><input type="text" name="q" value="'.(isset($_POST['q'])?$_POST['q']:'').'"/></form></li>'."\n";
	if (substr($p,0,1)!=':'){
		echo '<li><a class="hidden" href="'.$s.'?'.$p.'/edit">edit</a></li>'."\n";
    } else {
		echo '<li><a class="hidden" href="'.$s.'?new/edit">new</a></li>'."\n";
    }
	echo '</ul>';
	echo '</body></html>';
}
function swPages() {
	$pages=glob(dirname(__FILE__).'/pages/*', GLOB_ONLYDIR);
	$pages = array_map('removeDirname',$pages);
	return $pages;
}
function swAuth() {
	global $_sw,$s,$p;
	$form='<form method="post" action="'.$s.'?'.$p.'/edit">Username: <input type="text" name="login"/><br/>Password: <input type="password" name="pwd"/><br/><input type="submit"/></form>';
	if (isset($_POST['login']) && $_POST['login']==$_sw['login'] && $_POST['pwd']==$_sw['pwd'] && $_sw['pwd']!='changethis')
		$_SESSION['user'] = $_sw['login'];
	if(!isset($_SESSION['user']) || $_SESSION['user']!=$_sw['login']) {
	?>
	<!doctype html>
	<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr" lang="fr">
	<head>
	<title>Please authenticate</title>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	</head>
	<body>
	<?php echo $form;?>
	</body>
	<?php
		die;
	}
}
function isAuth() {
	global $_sw;
	return (isset($_SESSION['user']) && $_SESSION['user']==$_sw['login']);
}
function swHeader($title='') {
	global $p,$m,$s;
	$title=$title==''?$p.($m!=''?' - '.$m:''):$title;
	// $color='449';//bleu
	$color='E70';//orange
	//$color='944';//rouge
	//$color='494';//vert
?>
<!doctype html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr" lang="fr">
<head>
<title><?php echo $title; ?></title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="alternate" type="application/rss+xml" title="RSS 2.0" href="<?php echo $s; ?>?:rss" />
<style>
	:root {--highlight: #<?php echo $color; ?>;}
	@media (prefers-color-scheme: light) {:root {--color: #333;--bg: #fff;}}
	@media (prefers-color-scheme: dark) {:root {--color: #eee;--bg: #333;}}
	body {color: var(--color);font-family: Georgia, 'Times New Roman', Times, serif;width: 80%;margin: 2em auto 2em;padding: 1em;border: 1px solid var(--highlight);background-color: var(--bg);}
	a[href] {color: var(--color);text-decoration: underline;}
	a[href]:hover {text-decoration: none;}
	quote {border-left: 0.3em solid #CCC;margin: 0.5em; padding: 0.3em;}
	h1, h1 a[href], h2, h3, h4 {color: var(--highlight);letter-spacing: 0.1em;font-weight:normal;}
	.hidden{display:none;}
	form .br {text-align: center;}
	textarea {width: 95%; height: 20em;margin: auto;display: block;font-family: Georgia, 'Times New Roman', Times, serif;}
	form input[type=submit], form input[type=file], form button {outline:none; background-color: var(--bg);color: var(--highlight);padding: 0.2em;margin:0.2em;border: 1px solid var(--highlight);border-radius:0.3em;}
	form input[type=submit]:hover, form input[type=submit]:focus, form button:focus, input[type=file]:focus {background-color: var(--highlight);color:var(--bg);}
	form h1 input {width: 95%; margin:auto;letter-spacing: 0.1em;font-weight:normal;font-size:1em;font-family: Georgia, 'Times New Roman', Times, serif;}
	#fn {border-top: 1px solid var(--highlight);padding-top: 1em;}
	#fn li {list-style: none;font-size: 70%;}
	#history {border-top: 1px solid var(--highlight);padding-top: 1em;}
	#history li.current {font-style: italic;}
	#footer {font-size: 80%;text-align: center;border-top: 1px solid var(--highlight);padding-top: 1em;}
	#footer li {display: inline; list-style: none;padding: 1em;}
	#footer a {color: var(--highlight);}
	#footer form {display: inline;}
	#footer a[href].hidden {display:inline;color:var(--bg)}
	#footer:hover a[href].hidden {color:var(--highlight);}
	ul#footer {padding-left:0;}
	#search li span{color: #999;padding-left: 1em;}
</style>
</head>
<body>
<?php
}
function FormatRfc1123Date($strDate)
{
	$strYear = substr($strDate, 0, 4);
	$strMonth = substr($strDate, 4, 2);
	$strDay = substr($strDate, 6, 2);
	$strHour = substr($strDate, 9, 2);
	$strMinute = substr($strDate, 11, 2);
	$strSecond = substr($strDate, 13, 2);
	$date = mktime($strHour, $strMinute, $strSecond, $strMonth, $strDay, $strYear);
	return gmdate('D, d M Y H:i:s', $date) . ' GMT';
}
function FormatReadableDate($strDate)
{
	$strYear = substr($strDate, 0, 4);
	$strMonth = substr($strDate, 4, 2);
	$strDay = substr($strDate, 6, 2);
	$strHour = substr($strDate, 9, 2);
	$strMinute = substr($strDate, 11, 2);
	$strSecond = substr($strDate, 13, 2);
	$date = mktime($strHour, $strMinute, $strSecond, $strMonth, $strDay, $strYear);
	return gmdate('r', $date);
}
function swGetAttachedFiles($p) {
	$a = glob(dirname(__FILE__).'/pages/'.$p.'/*');
	rsort($a);
	$r=$m=array();
	foreach($a as $file){
		if(preg_match('/(.*)\.(\d{8}-\d{6})$/',$file,$m))
			$r[removeDirname($m[1])][] = $m[2]; //
	}
	return $r;

}
function swDisplay() {
	global $p;
	swHeader();
	echo '<h1>'.$p.'</h1>';
	echo txt2html(swGet($p));
	swFooter();
}
function swEdit() {
	global $p,$s;
	swAuth();
	if (isset($_POST['s']) && $_POST['s']!='preview') { //save or cancel
		if ($_POST['s']=='save') {
			swSave($p, stripslashes($_POST['c']));
			$a = array();
			preg_match('/^([:\.]?[\w ,\'!]+)/',$_POST['t'],$a);
			if (count($a)>1 && $a[1]!=$p) {
				rename(dirname(__FILE__).'/pages/'.$p, dirname(__FILE__).'/pages/'.$a[1]);//rename
				$p=$a[1];
			}
		} elseif ($_POST['s']=='upload') { //upload file
			if ($_FILES['pj']['size']!=0) {
				if(strtolower(substr($_FILES['pj']['name'],-3))=='php') //rename to phps to avoid code execution
					move_uploaded_file($_FILES['pj']['tmp_name'], dirname(__FILE__).'/pages/'.$p.'/'.basename($_FILES['pj']['name']).'s.'.date('Ymd-His'));
				else
					move_uploaded_file($_FILES['pj']['tmp_name'], dirname(__FILE__).'/pages/'.$p.'/'.basename($_FILES['pj']['name']).'.'.date('Ymd-His'));
				// }
			}
			header('Location: ./'.$s.'?'.$p.'/edit');
			die;
		}
		header('Location: ./'.$s.'?'.$p);
		die;
	}
	swHeader();
	// preview
	if (isset($_POST['c'])) { 
		$c = $_POST['c'];
		$t = $_POST['t'];
	} else {
		$c = swGet($p);
		$t=$p;
	}
	echo '<form enctype="multipart/form-data" method="post" action="'.$s.'?'.$p.'/edit">';
	echo '<div class="br"><h1><!--'.$p.'--><input name="t" type="text" value="'.$t.'"/></h1></div>'."\n";
	echo txt2html(stripslashes($c));
	echo '<div class="br"><textarea name="c">'.stripslashes($c).'</textarea>';
	echo '<input type="submit" name="s" value="preview"/>';
	echo '<input type="submit" name="s" value="save"/>';
	echo '<input name="pj" type="file" />';
	echo '<input type="submit" name="s" value="upload"/>';
	echo '<input type="submit" name="s" value="cancel"/>';
	echo '<button onclick="document.getElementById(\'syntax\').classList.toggle(\'hidden\');return false;">syntax</button></div>';
	echo '</form>';
	$pjs=swGetAttachedFiles($p);
	if(count($pjs)!=0) echo '<ul id="pjs">';
	foreach($pjs as $name => $versions)
		echo '<li>'.$name.'</li>';
	if(count($pjs)!=0) echo '</ul>';
	echo '<div id="syntax" class="hidden">'.txt2html(swGet('Syntaxe')).'</div>';
}
function swHistory() {
	global $p,$v,$d,$s;
	swAuth();
	if ($d=='set') {swSet($p,$v);}
	if ($d=='delete') {swDel($p,$v);}
	$a = array();
	if (preg_match('/^delete\/(.*)$/',$d,$a)) {unlink(dirname(__FILE__).'/pages/'.$a[1].'.'.$v);$v='';}
	swHeader();
	echo '<h1>'.$p.'</h1>';
	echo txt2html(swGet($p,$v));

	$versions=swVersions($p);
	if(count($versions)>0) {
		echo '<ul id="history">'."\n";
		foreach($versions as $version)  {
			echo '	<li'.($version==$v?' class="current"':'').'><a href="'.$s.'?'.$p.'/history/'.$version.'">'.FormatReadableDate($version).'</a>'.
				($version==$v?' <a href="'.$s.'?'.$p.'/history/'.$version.'/set">set</a>':'').
				($version==$v?' <a href="'.$s.'?'.$p.'/history/'.$version.'/delete">delete</a>':'').'</li>'."\n";
		}
		echo '</ul>'."\n";
		$pjs=swGetAttachedFiles($p);
		foreach($pjs as $pj => $versions) {
			echo '<ul>';
			foreach($versions as $version)
				echo '<li><a target="_blank" href="'.$s.'/pages/'.$pj.'.'.$version.'">'.$pj.'</a> - '.FormatReadableDate($version).
				' <a href="'.$s.'?'.$p.'/history/'.$version.'/delete/'.$pj.'">delete</a>'.
				'</li>';
			echo '</ul>';
		}
	}
	swFooter();
}
function swSpecialAll() {
	global $s;
	swHeader();
	echo '<h1>All pages</h1>';
	$pages = swPages();
	if(count($pages)!=0) echo '<ul>';
	foreach($pages as $page)
		echo '<li><a href="'.$s.'?'.$page.'">'.$page.'</a></li>';
	if(count($pages)!=0) echo '</ul>';
	swFooter();
}
function swSpecialLast() {
	global $s;
	$pages = swPages();
	foreach($pages as $page) {
		$versions = swVersions($page);
		if (isset($versions[0])) $last[$versions[0]] = $page;
	}
	krsort($last);
	swHeader();
	echo '<h1>Latest changes</h1>';
	if(count($last)!=0) echo '<ul>';
	foreach(array_slice($last,0,100) as $page)
		echo '<li><a href="'.$s.'?'.$page.'">'.$page.'</a></li>';
	if(count($last)!=0) echo '</ul>';
	swFooter();
}
function swSpecialBlog() {
	global $s,$_sw;
	$pages = swPages();
	foreach($pages as $page) {
		$versions = swVersions($page);
		if (isset($versions[0])) $last[$versions[count($versions)-1]] = $page;
		//if (isset($versions[0])) $last[$versions[0]] = $page; // version je change un mot => la page remonte.
	}
	krsort($last);
	swHeader($_sw['title']);
	foreach(array_slice($last,0,10) as $page) {
		echo '<h1><a href="'.$s.'?'.$page.'">'.$page.'</a></h1>';
		echo txt2html(swGet($page),$page);
	}
	swFooter();
}
function swSpecialRss() {
	global $_sw;
	$pages = swPages();
	foreach($pages as $page) {
		$versions = swVersions($page);
		if (isset($versions[0])) $last[$versions[count($versions)-1]] = $page;
	}
	krsort($last);
	$dates = array_keys($last);
	header('Content-Type: application/xml; charset=UTF-8');
	echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
	echo '<rss version="2.0">'."\n";
	echo '<channel>'."\n";
	echo '	<title>'.$_sw['title'].'</title>'."\n";
	echo '	<link>'.'http://' . $_SERVER['SERVER_NAME'].$_SERVER['PHP_SELF'].	'</link>'."\n";
	echo '	<description></description>'."\n";
	echo '	<lastBuildDate>'.FormatRfc1123Date($dates[0]).'</lastBuildDate>'."\n";

	foreach(array_slice($last,0,5) as $date => $page) {
		echo'	<item>'."\n";
		echo'		<title>'.$page.'</title>'."\n";
		echo'		<link>http://' . $_SERVER['SERVER_NAME'].$_SERVER['PHP_SELF'].'?'.$page.'</link>'."\n";
		echo'		<pubDate>'.FormatRfc1123Date($date).'</pubDate>'."\n";
		echo '<description>'.htmlentities(txt2html(swGet($page))).'</description>'."\n";
		echo'	</item>'."\n";
	}
	echo '</channel>'."\n";
	echo '</rss>';
}
function swSpecialSearch() {
	global $s;
	$a = array();
	$q=$_POST['q'];
	$r='';
	swHeader();
	echo '<h1>Search for "'.$q.'"</h1>';
	$pages = swPages();
	foreach($pages as $page)
		if (preg_match('/.{0,20}'.preg_quote($q).'.{0,20}/si',$page.' - '.swGet($page),$a)) {//ignorer accents?
			$r.='<li><a href="'.$s.'?'.$page.'">'.$page.'</a><br/><span>'.$a[0].'</span></li>';
		}
	if($r!='') echo '<ul id="search">'.$r.'</ul>';
	else echo 'No results!';
	swFooter();
}
?>