initial checkin

1 files changed, 1009 insertions, 0 deletions

diff --git a/plugins/dokuwiki/inc/common.php b/plugins/dokuwiki/inc/common.php
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+++ b/plugins/dokuwiki/inc/common.php
@@ -0,0 +1,1009 @@
+<?php
+/**
+ * Common DokuWiki functions
+ *
+ * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
+ * @author     Andreas Gohr <andi@splitbrain.org>
+ */
+
+if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../').'/');
+require_once(DOKU_CONF.'dokuwiki.php');
+require_once(DOKU_INC.'inc/io.php');
+require_once(DOKU_INC.'inc/utf8.php');
+require_once(DOKU_INC.'inc/parserutils.php');
+require_once(DOKU_INC.'inc/infoutils.php');
+
+/**
+ * These constants are used with the recents function
+ */
+define('RECENTS_SKIP_DELETED',2);
+define('RECENTS_SKIP_MINORS',4);
+define('RECENTS_SKIP_SUBSPACES',8);
+
+/**
+ * Wrapper around htmlspecialchars()
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ * @see    htmlspecialchars()
+ */
+function hsc($string){
+  return htmlspecialchars($string, ENT_QUOTES, 'UTF-8');
+}
+
+/**
+ * print a newline terminated string
+ *
+ * You can give an indention as optional parameter
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function ptln($string,$intend=0){
+  for($i=0; $i<$intend; $i++) print ' ';
+  echo "$string\n";
+}
+
+/**
+ * strips control characters (<32) from the given string
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function stripctl($string){
+  return preg_replace('/[\x00-\x1F]+/s','',$string);
+}
+
+/**
+ * Return info about the current document as associative
+ * array.
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function pageinfo(){
+  global $ID;
+  global $REV;
+  global $USERINFO;
+  global $conf;
+
+  // include ID & REV not redundant, as some parts of DokuWiki may temporarily change $ID, e.g. p_wiki_xhtml
+  // FIXME ... perhaps it would be better to ensure the temporary changes weren't necessary
+  $info['id'] = $ID;
+  $info['rev'] = $REV;
+
+  if($_SERVER['REMOTE_USER']){
+    $info['userinfo']   = $USERINFO;
+    $info['perm']       = auth_quickaclcheck($ID);
+    $info['subscribed'] = is_subscribed($ID,$_SERVER['REMOTE_USER']);
+    $info['client']     = $_SERVER['REMOTE_USER'];
+
+    // if some outside auth were used only REMOTE_USER is set
+    if(!$info['userinfo']['name']){
+      $info['userinfo']['name'] = $_SERVER['REMOTE_USER'];
+    }
+
+  }else{
+    $info['perm']       = auth_aclcheck($ID,'',null);
+    $info['subscribed'] = false;
+    $info['client']     = clientIP(true);
+  }
+
+  $info['namespace'] = getNS($ID);
+  $info['locked']    = checklock($ID);
+  $info['filepath']  = realpath(wikiFN($ID));
+  $info['exists']    = @file_exists($info['filepath']);
+  if($REV){
+    //check if current revision was meant
+    if($info['exists'] && (@filemtime($info['filepath'])==$REV)){
+      $REV = '';
+    }else{
+      //really use old revision
+      $info['filepath'] = realpath(wikiFN($ID,$REV));
+      $info['exists']   = @file_exists($info['filepath']);
+    }
+  }
+  $info['rev'] = $REV;
+  if($info['exists']){
+    $info['writable'] = (is_writable($info['filepath']) &&
+                         ($info['perm'] >= AUTH_EDIT));
+  }else{
+    $info['writable'] = ($info['perm'] >= AUTH_CREATE);
+  }
+  $info['editable']  = ($info['writable'] && empty($info['lock']));
+  $info['lastmod']   = @filemtime($info['filepath']);
+
+  //load page meta data
+  $info['meta'] = p_get_metadata($ID);
+
+  //who's the editor
+  if($REV){
+    $revinfo = getRevisionInfo($ID, $REV, 1024);
+  }else{
+    $revinfo = isset($info['meta']['last_change']) ? $info['meta']['last_change'] : getRevisionInfo($ID,$info['lastmod'],1024);
+  }
+
+  $info['ip']     = $revinfo['ip'];
+  $info['user']   = $revinfo['user'];
+  $info['sum']    = $revinfo['sum'];
+  // See also $INFO['meta']['last_change'] which is the most recent log line for page $ID.
+  // Use $INFO['meta']['last_change']['type']==='e' in place of $info['minor'].
+
+  if($revinfo['user']){
+    $info['editor'] = $revinfo['user'];
+  }else{
+    $info['editor'] = $revinfo['ip'];
+  }
+
+  // draft
+  $draft = getCacheName($info['client'].$ID,'.draft');
+  if(@file_exists($draft)){
+    if(@filemtime($draft) < @filemtime(wikiFN($ID))){
+      // remove stale draft
+      @unlink($draft);
+    }else{
+      $info['draft'] = $draft;
+    }
+  }
+
+  return $info;
+}
+
+/**
+ * Build an string of URL parameters
+ *
+ * @author Andreas Gohr
+ */
+function buildURLparams($params, $sep='&amp;'){
+  $url = '';
+  $amp = false;
+  foreach($params as $key => $val){
+    if($amp) $url .= $sep;
+
+    $url .= $key.'=';
+    $url .= rawurlencode($val);
+    $amp = true;
+  }
+  return $url;
+}
+
+/**
+ * Build an string of html tag attributes
+ *
+ * Skips keys starting with '_', values get HTML encoded
+ *
+ * @author Andreas Gohr
+ */
+function buildAttributes($params){
+  $url = '';
+  foreach($params as $key => $val){
+    if($key{0} == '_') continue;
+
+    $url .= $key.'="';
+    $url .= htmlspecialchars ($val);
+    $url .= '" ';
+  }
+  return $url;
+}
+
+
+/**
+ * This builds the breadcrumb trail and returns it as array
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function breadcrumbs(){
+  // we prepare the breadcrumbs early for quick session closing
+  static $crumbs = null;
+  if($crumbs != null) return $crumbs;
+
+  global $ID;
+  global $ACT;
+  global $conf;
+  $crumbs = $_SESSION[DOKU_COOKIE]['bc'];
+
+  //first visit?
+  if (!is_array($crumbs)){
+    $crumbs = array();
+  }
+  //we only save on show and existing wiki documents
+  $file = wikiFN($ID);
+  if($ACT != 'show' || !@file_exists($file)){
+    $_SESSION[DOKU_COOKIE]['bc'] = $crumbs;
+    return $crumbs;
+  }
+
+  // page names
+  $name = noNS($ID);
+  if ($conf['useheading']) {
+    // get page title
+    $title = p_get_first_heading($ID);
+    if ($title) {
+      $name = $title;
+    }
+  }
+
+  //remove ID from array
+  if (isset($crumbs[$ID])) {
+    unset($crumbs[$ID]);
+  }
+
+  //add to array
+  $crumbs[$ID] = $name;
+  //reduce size
+  while(count($crumbs) > $conf['breadcrumbs']){
+    array_shift($crumbs);
+  }
+  //save to session
+  $_SESSION[DOKU_COOKIE]['bc'] = $crumbs;
+  return $crumbs;
+}
+
+/**
+ * Filter for page IDs
+ *
+ * This is run on a ID before it is outputted somewhere
+ * currently used to replace the colon with something else
+ * on Windows systems and to have proper URL encoding
+ *
+ * Urlencoding is ommitted when the second parameter is false
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function idfilter($id,$ue=true){
+  global $conf;
+  if ($conf['useslash'] && $conf['userewrite']){
+    $id = strtr($id,':','/');
+  }elseif (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' &&
+      $conf['userewrite']) {
+    $id = strtr($id,':',';');
+  }
+  if($ue){
+    $id = rawurlencode($id);
+    $id = str_replace('%3A',':',$id); //keep as colon
+    $id = str_replace('%2F','/',$id); //keep as slash
+  }
+  return $id;
+}
+
+/**
+ * This builds a link to a wikipage
+ *
+ * It handles URL rewriting and adds additional parameter if
+ * given in $more
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function wl($id='',$more='',$abs=false,$sep='&amp;'){
+  global $conf;
+  if(is_array($more)){
+    $more = buildURLparams($more,$sep);
+  }else{
+    $more = str_replace(',',$sep,$more);
+  }
+
+  $id    = idfilter($id);
+  if($abs){
+    $xlink = DOKU_URL;
+  }else{
+    $xlink = DOKU_BASE;
+  }
+
+  if($conf['userewrite'] == 2){
+    $xlink .= DOKU_SCRIPT.'/'.$id;
+    if($more) $xlink .= '?'.$more;
+  }elseif($conf['userewrite']){
+    $xlink .= $id;
+    if($more) $xlink .= '?'.$more;
+  }else{
+    $xlink .= DOKU_SCRIPT.'?id='.$id;
+    if($more) $xlink .= $sep.$more;
+  }
+
+  return $xlink;
+}
+
+/**
+ * This builds a link to an alternate page format
+ *
+ * Handles URL rewriting if enabled. Follows the style of wl().
+ *
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ */
+function exportlink($id='',$format='raw',$more='',$abs=false,$sep='&amp;'){
+  global $conf;
+  if(is_array($more)){
+    $more = buildURLparams($more,$sep);
+  }else{
+    $more = str_replace(',',$sep,$more);
+  }
+
+  $format = rawurlencode($format);
+  $id = idfilter($id);
+  if($abs){
+    $xlink = DOKU_URL;
+  }else{
+    $xlink = DOKU_BASE;
+  }
+
+  if($conf['userewrite'] == 2){
+    $xlink .= DOKU_SCRIPT.'/'.$id.'?do=export_'.$format;
+    if($more) $xlink .= $sep.$more;
+  }elseif($conf['userewrite'] == 1){
+    $xlink .= '_export/'.$format.'/'.$id;
+    if($more) $xlink .= '?'.$more;
+  }else{
+    $xlink .= DOKU_SCRIPT.'?do=export_'.$format.$sep.'id='.$id;
+    if($more) $xlink .= $sep.$more;
+  }
+
+  return $xlink;
+}
+
+/**
+ * Build a link to a media file
+ *
+ * Will return a link to the detail page if $direct is false
+ */
+function ml($id='',$more='',$direct=true,$sep='&amp;'){
+  global $conf;
+  if(is_array($more)){
+    $more = buildURLparams($more,$sep);
+  }else{
+    $more = str_replace(',',$sep,$more);
+  }
+
+  $xlink = DOKU_BASE;
+
+  // external URLs are always direct without rewriting
+  if(preg_match('#^(https?|ftp)://#i',$id)){
+    $xlink .= 'lib/exe/fetch.php';
+    if($more){
+      $xlink .= '?'.$more;
+      $xlink .= $sep.'media='.rawurlencode($id);
+    }else{
+      $xlink .= '?media='.rawurlencode($id);
+    }
+    return $xlink;
+  }
+
+  $id = idfilter($id);
+
+  // decide on scriptname
+  if($direct){
+    if($conf['userewrite'] == 1){
+      $script = '_media';
+    }else{
+      $script = 'lib/exe/fetch.php';
+    }
+  }else{
+    if($conf['userewrite'] == 1){
+      $script = '_detail';
+    }else{
+      $script = 'lib/exe/detail.php';
+    }
+  }
+
+  // build URL based on rewrite mode
+   if($conf['userewrite']){
+     $xlink .= $script.'/'.$id;
+     if($more) $xlink .= '?'.$more;
+   }else{
+     if($more){
+       $xlink .= $script.'?'.$more;
+       $xlink .= $sep.'media='.$id;
+     }else{
+       $xlink .= $script.'?media='.$id;
+     }
+   }
+
+  return $xlink;
+}
+
+
+
+/**
+ * Just builds a link to a script
+ *
+ * @todo   maybe obsolete
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function script($script='doku.php'){
+#  $link = getBaseURL();
+#  $link .= $script;
+#  return $link;
+  return DOKU_BASE.DOKU_SCRIPT;
+}
+
+/**
+ * Spamcheck against wordlist
+ *
+ * Checks the wikitext against a list of blocked expressions
+ * returns true if the text contains any bad words
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function checkwordblock(){
+  global $TEXT;
+  global $conf;
+
+  if(!$conf['usewordblock']) return false;
+
+  // we prepare the text a tiny bit to prevent spammers circumventing URL checks
+  $text = preg_replace('!(\b)(www\.[\w.:?\-;,]+?\.[\w.:?\-;,]+?[\w/\#~:.?+=&%@\!\-.:?\-;,]+?)([.:?\-;,]*[^\w/\#~:.?+=&%@\!\-.:?\-;,])!i','\1http://\2 \2\3',$TEXT);
+
+  $wordblocks = getWordblocks();
+  //how many lines to read at once (to work around some PCRE limits)
+  if(version_compare(phpversion(),'4.3.0','<')){
+    //old versions of PCRE define a maximum of parenthesises even if no
+    //backreferences are used - the maximum is 99
+    //this is very bad performancewise and may even be too high still
+    $chunksize = 40;
+  }else{
+    //read file in chunks of 200 - this should work around the
+    //MAX_PATTERN_SIZE in modern PCRE
+    $chunksize = 200;
+  }
+  while($blocks = array_splice($wordblocks,0,$chunksize)){
+    $re = array();
+    #build regexp from blocks
+    foreach($blocks as $block){
+      $block = preg_replace('/#.*$/','',$block);
+      $block = trim($block);
+      if(empty($block)) continue;
+      $re[]  = $block;
+    }
+    if(preg_match('#('.join('|',$re).')#si',$text, $match=array())) {
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * Return the IP of the client
+ *
+ * Honours X-Forwarded-For and X-Real-IP Proxy Headers
+ *
+ * It returns a comma separated list of IPs if the above mentioned
+ * headers are set. If the single parameter is set, it tries to return
+ * a routable public address, prefering the ones suplied in the X
+ * headers
+ *
+ * @param  boolean $single If set only a single IP is returned
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function clientIP($single=false){
+  $ip = array();
+  $ip[] = $_SERVER['REMOTE_ADDR'];
+  if(!empty($_SERVER['HTTP_X_FORWARDED_FOR']))
+    $ip = array_merge($ip,explode(',',$_SERVER['HTTP_X_FORWARDED_FOR']));
+  if(!empty($_SERVER['HTTP_X_REAL_IP']))
+    $ip = array_merge($ip,explode(',',$_SERVER['HTTP_X_REAL_IP']));
+
+  // remove any non-IP stuff
+  $cnt = count($ip);
+  $match = array();
+  for($i=0; $i<$cnt; $i++){
+    if(preg_match('/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/',$ip[$i],$match)) {
+      $ip[$i] = $match[0];
+    } else {
+      $ip[$i] = '';
+    }
+    if(empty($ip[$i])) unset($ip[$i]);
+  }
+  $ip = array_values(array_unique($ip));
+  if(!$ip[0]) $ip[0] = '0.0.0.0'; // for some strange reason we don't have a IP
+
+  if(!$single) return join(',',$ip);
+
+  // decide which IP to use, trying to avoid local addresses
+  $ip = array_reverse($ip);
+  foreach($ip as $i){
+    if(preg_match('/^(127\.|10\.|192\.168\.|172\.((1[6-9])|(2[0-9])|(3[0-1]))\.)/',$i)){
+      continue;
+    }else{
+      return $i;
+    }
+  }
+  // still here? just use the first (last) address
+  return $ip[0];
+}
+
+/**
+ * Checks if a given page is currently locked.
+ *
+ * removes stale lockfiles
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function checklock($id){
+  global $conf;
+  $lock = wikiLockFN($id);
+
+  //no lockfile
+  if(!@file_exists($lock)) return false;
+
+  //lockfile expired
+  if((time() - filemtime($lock)) > $conf['locktime']){
+    @unlink($lock);
+    return false;
+  }
+
+  //my own lock
+  $ip = io_readFile($lock);
+  if( ($ip == clientIP()) || ($ip == $_SERVER['REMOTE_USER']) ){
+    return false;
+  }
+
+  return $ip;
+}
+
+/**
+ * Lock a page for editing
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function lock($id){
+  $lock = wikiLockFN($id);
+  if($_SERVER['REMOTE_USER']){
+    io_saveFile($lock,$_SERVER['REMOTE_USER']);
+  }else{
+    io_saveFile($lock,clientIP());
+  }
+}
+
+/**
+ * Unlock a page if it was locked by the user
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ * @return bool true if a lock was removed
+ */
+function unlock($id){
+  $lock = wikiLockFN($id);
+  if(@file_exists($lock)){
+    $ip = io_readFile($lock);
+    if( ($ip == clientIP()) || ($ip == $_SERVER['REMOTE_USER']) ){
+      @unlink($lock);
+      return true;
+    }
+  }
+  return false;
+}
+
+/**
+ * convert line ending to unix format
+ *
+ * @see    formText() for 2crlf conversion
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function cleanText($text){
+  $text = preg_replace("/(\015\012)|(\015)/","\012",$text);
+  return $text;
+}
+
+/**
+ * Prepares text for print in Webforms by encoding special chars.
+ * It also converts line endings to Windows format which is
+ * pseudo standard for webforms.
+ *
+ * @see    cleanText() for 2unix conversion
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function formText($text){
+  $text = preg_replace("/\012/","\015\012",$text);
+  return htmlspecialchars($text);
+}
+
+/**
+ * Returns the specified local text in raw format
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function rawLocale($id){
+  return io_readFile(localeFN($id));
+}
+
+/**
+ * Returns the raw WikiText
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function rawWiki($id,$rev=''){
+  return io_readWikiPage(wikiFN($id, $rev), $id, $rev);
+}
+
+/**
+ * Returns the pagetemplate contents for the ID's namespace
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function pageTemplate($data){
+  $id = $data[0];
+  global $conf;
+  global $INFO;
+  $tpl = io_readFile(dirname(wikiFN($id)).'/_template.txt');
+  $tpl = str_replace('@ID@',$id,$tpl);
+  $tpl = str_replace('@NS@',getNS($id),$tpl);
+  $tpl = str_replace('@PAGE@',strtr(noNS($id),'_',' '),$tpl);
+  $tpl = str_replace('@USER@',$_SERVER['REMOTE_USER'],$tpl);
+  $tpl = str_replace('@NAME@',$INFO['userinfo']['name'],$tpl);
+  $tpl = str_replace('@MAIL@',$INFO['userinfo']['mail'],$tpl);
+  $tpl = str_replace('@DATE@',date($conf['dformat']),$tpl);
+  return $tpl;
+}
+
+
+/**
+ * Returns the raw Wiki Text in three slices.
+ *
+ * The range parameter needs to have the form "from-to"
+ * and gives the range of the section in bytes - no
+ * UTF-8 awareness is needed.
+ * The returned order is prefix, section and suffix.
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function rawWikiSlices($range,$id,$rev=''){
+  list($from,$to) = explode('-',$range,2);
+  $text = io_readWikiPage(wikiFN($id, $rev), $id, $rev);
+  if(!$from) $from = 0;
+  if(!$to)   $to   = strlen($text)+1;
+
+  $slices[0] = substr($text,0,$from-1);
+  $slices[1] = substr($text,$from-1,$to-$from);
+  $slices[2] = substr($text,$to);
+
+  return $slices;
+}
+
+/**
+ * Joins wiki text slices
+ *
+ * function to join the text slices with correct lineendings again.
+ * When the pretty parameter is set to true it adds additional empty
+ * lines between sections if needed (used on saving).
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function con($pre,$text,$suf,$pretty=false){
+
+  if($pretty){
+    if($pre && substr($pre,-1) != "\n") $pre .= "\n";
+    if($suf && substr($text,-1) != "\n") $text .= "\n";
+  }
+
+  if($pre) $pre .= "\n";
+  if($suf) $text .= "\n";
+  return $pre.$text.$suf;
+}
+
+/**
+ * Saves a wikitext by calling io_writeWikiPage.
+ * Also directs changelog and attic updates.
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ */
+function saveWikiText($id,$text,$summary,$minor=false){
+  /* Note to developers:
+     This code is subtle and delicate. Test the behavior of
+     the attic and changelog with dokuwiki and external edits
+     after any changes. External edits change the wiki page
+     directly without using php or dokuwiki.
+  */
+  global $conf;
+  global $lang;
+  global $REV;
+  // ignore if no changes were made
+  if($text == rawWiki($id,'')){
+    return;
+  }
+
+  $file = wikiFN($id);
+  $old = @filemtime($file); // from page
+  $wasRemoved = empty($text);
+  $wasCreated = !@file_exists($file);
+  $wasReverted = ($REV==true);
+  $newRev = false;
+  $oldRev = getRevisions($id, -1, 1, 1024); // from changelog
+  $oldRev = (int)(empty($oldRev)?0:$oldRev[0]);
+  if(!@file_exists(wikiFN($id, $old)) && @file_exists($file) && $old>=$oldRev) {
+    // add old revision to the attic if missing
+    saveOldRevision($id);
+    // add a changelog entry if this edit came from outside dokuwiki
+    if ($old>$oldRev) {
+      addLogEntry($old, $id);
+      // send notify mails
+      notify($id,'admin',$oldRev,'',false);
+      notify($id,'subscribers',$oldRev,'',false);
+      // remove soon to be stale instructions
+      $cache = new cache_instructions($id, $file);
+      $cache->removeCache();
+    }
+  }
+
+  if ($wasRemoved){
+    // pre-save deleted revision
+    @touch($file);
+    clearstatcache();
+    $newRev = saveOldRevision($id);
+    // remove empty file
+    @unlink($file);
+    // remove old meta info...
+    $mfiles = metaFiles($id);
+    $changelog = metaFN($id, '.changes');
+    foreach ($mfiles as $mfile) {
+      // but keep per-page changelog to preserve page history
+      if (@file_exists($mfile) && $mfile!==$changelog) { @unlink($mfile); }
+    }
+    $del = true;
+    // autoset summary on deletion
+    if(empty($summary)) $summary = $lang['deleted'];
+    // remove empty namespaces
+    io_sweepNS($id, 'datadir');
+    io_sweepNS($id, 'mediadir');
+  }else{
+    // save file (namespace dir is created in io_writeWikiPage)
+    io_writeWikiPage($file, $text, $id);
+    // pre-save the revision, to keep the attic in sync
+    $newRev = saveOldRevision($id);
+    $del = false;
+  }
+
+  // select changelog line type
+  $extra = '';
+  $type = 'E';
+  if ($wasReverted) {
+    $type = 'R';
+    $extra = $REV;
+  }
+  else if ($wasCreated) { $type = 'C'; }
+  else if ($wasRemoved) { $type = 'D'; }
+  else if ($minor && $conf['useacl'] && $_SERVER['REMOTE_USER']) { $type = 'e'; } //minor edits only for logged in users
+
+  addLogEntry($newRev, $id, $type, $summary, $extra);
+  // send notify mails
+  notify($id,'admin',$old,$summary,$minor);
+  notify($id,'subscribers',$old,$summary,$minor);
+
+  // update the purgefile (timestamp of the last time anything within the wiki was changed)
+  io_saveFile($conf['cachedir'].'/purgefile',time());
+}
+
+/**
+ * moves the current version to the attic and returns its
+ * revision date
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function saveOldRevision($id){
+  global $conf;
+  $oldf = wikiFN($id);
+  if(!@file_exists($oldf)) return '';
+  $date = filemtime($oldf);
+  $newf = wikiFN($id,$date);
+  io_writeWikiPage($newf, rawWiki($id), $id, $date);
+  return $date;
+}
+
+/**
+ * Sends a notify mail on page change
+ *
+ * @param  string  $id       The changed page
+ * @param  string  $who      Who to notify (admin|subscribers)
+ * @param  int     $rev      Old page revision
+ * @param  string  $summary  What changed
+ * @param  boolean $minor    Is this a minor edit?
+ * @param  array   $replace  Additional string substitutions, @KEY@ to be replaced by value
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function notify($id,$who,$rev='',$summary='',$minor=false,$replace=array()){
+  global $lang;
+  global $conf;
+
+  // decide if there is something to do
+  if($who == 'admin'){
+    if(empty($conf['notify'])) return; //notify enabled?
+    $text = rawLocale('mailtext');
+    $to   = $conf['notify'];
+    $bcc  = '';
+  }elseif($who == 'subscribers'){
+    if(!$conf['subscribers']) return; //subscribers enabled?
+    if($conf['useacl'] && $_SERVER['REMOTE_USER'] && $minor) return; //skip minors
+    $bcc  = subscriber_addresslist($id);
+    if(empty($bcc)) return;
+    $to   = '';
+    $text = rawLocale('subscribermail');
+  }elseif($who == 'register'){
+    if(empty($conf['registernotify'])) return;
+    $text = rawLocale('registermail');
+    $to   = $conf['registernotify'];
+    $bcc  = '';
+  }else{
+    return; //just to be safe
+  }
+
+  $text = str_replace('@DATE@',date($conf['dformat']),$text);
+  $text = str_replace('@BROWSER@',$_SERVER['HTTP_USER_AGENT'],$text);
+  $text = str_replace('@IPADDRESS@',$_SERVER['REMOTE_ADDR'],$text);
+  $text = str_replace('@HOSTNAME@',gethostbyaddr($_SERVER['REMOTE_ADDR']),$text);
+  $text = str_replace('@NEWPAGE@',wl($id,'',true),$text);
+  $text = str_replace('@PAGE@',$id,$text);
+  $text = str_replace('@TITLE@',$conf['title'],$text);
+  $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
+  $text = str_replace('@SUMMARY@',$summary,$text);
+  $text = str_replace('@USER@',$_SERVER['REMOTE_USER'],$text);
+
+  foreach ($replace as $key => $substitution) {
+    $text = str_replace('@'.strtoupper($key).'@',$substitution, $text);
+  }
+
+  if($who == 'register'){
+    $subject = $lang['mail_new_user'].' '.$summary;
+  }elseif($rev){
+    $subject = $lang['mail_changed'].' '.$id;
+    $text = str_replace('@OLDPAGE@',wl($id,"rev=$rev",true),$text);
+    require_once(DOKU_INC.'inc/DifferenceEngine.php');
+    $df  = new Diff(preg_split('/\n/',rawWiki($id,$rev)),
+                    preg_split('/\n/',rawWiki($id)));
+    $dformat = new UnifiedDiffFormatter();
+    $diff    = $dformat->format($df);
+  }else{
+    $subject=$lang['mail_newpage'].' '.$id;
+    $text = str_replace('@OLDPAGE@','none',$text);
+    $diff = rawWiki($id);
+  }
+  $text = str_replace('@DIFF@',$diff,$text);
+  $subject = '['.$conf['title'].'] '.$subject;
+
+  mail_send($to,$subject,$text,$conf['mailfrom'],'',$bcc);
+}
+
+/**
+ * extracts the query from a google referer
+ *
+ * @todo   should be more generic and support yahoo et al
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function getGoogleQuery(){
+  $url = parse_url($_SERVER['HTTP_REFERER']);
+  if(!$url) return '';
+
+  if(!preg_match("#google\.#i",$url['host'])) return '';
+  $query = array();
+  parse_str($url['query'],$query);
+
+  return $query['q'];
+}
+
+/**
+ * Try to set correct locale
+ *
+ * @deprecated No longer used
+ * @author     Andreas Gohr <andi@splitbrain.org>
+ */
+function setCorrectLocale(){
+  global $conf;
+  global $lang;
+
+  $enc = strtoupper($lang['encoding']);
+  foreach ($lang['locales'] as $loc){
+    //try locale
+    if(@setlocale(LC_ALL,$loc)) return;
+    //try loceale with encoding
+    if(@setlocale(LC_ALL,"$loc.$enc")) return;
+  }
+  //still here? try to set from environment
+  @setlocale(LC_ALL,"");
+}
+
+/**
+ * Return the human readable size of a file
+ *
+ * @param       int    $size   A file size
+ * @param       int    $dec    A number of decimal places
+ * @author      Martin Benjamin <b.martin@cybernet.ch>
+ * @author      Aidan Lister <aidan@php.net>
+ * @version     1.0.0
+ */
+function filesize_h($size, $dec = 1){
+  $sizes = array('B', 'KB', 'MB', 'GB');
+  $count = count($sizes);
+  $i = 0;
+
+  while ($size >= 1024 && ($i < $count - 1)) {
+    $size /= 1024;
+    $i++;
+  }
+
+  return round($size, $dec) . ' ' . $sizes[$i];
+}
+
+/**
+ * return an obfuscated email address in line with $conf['mailguard'] setting
+ *
+ * @author Harry Fuecks <hfuecks@gmail.com>
+ * @author Christopher Smith <chris@jalakai.co.uk>
+ */
+function obfuscate($email) {
+  global $conf;
+
+  switch ($conf['mailguard']) {
+    case 'visible' :
+      $obfuscate = array('@' => ' [at] ', '.' => ' [dot] ', '-' => ' [dash] ');
+      return strtr($email, $obfuscate);
+
+    case 'hex' :
+      $encode = '';
+      for ($x=0; $x < strlen($email); $x++) $encode .= '&#x' . bin2hex($email{$x}).';';
+      return $encode;
+
+    case 'none' :
+    default :
+      return $email;
+  }
+}
+
+/**
+ * Let us know if a user is tracking a page
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function is_subscribed($id,$uid){
+  $file=metaFN($id,'.mlist');
+  if (@file_exists($file)) {
+    $mlist = file($file);
+    $pos = array_search($uid."\n",$mlist);
+    return is_int($pos);
+  }
+
+  return false;
+}
+
+/**
+ * Return a string with the email addresses of all the
+ * users subscribed to a page
+ *
+ * @author Steven Danz <steven-danz@kc.rr.com>
+ */
+function subscriber_addresslist($id){
+  global $conf;
+  global $auth;
+
+  $emails = '';
+
+  if (!$conf['subscribers']) return;
+
+  $mlist = array();
+  $file=metaFN($id,'.mlist');
+  if (@file_exists($file)) {
+    $mlist = file($file);
+  }
+  if(count($mlist) > 0) {
+    foreach ($mlist as $who) {
+      $who = rtrim($who);
+      $info = $auth->getUserData($who);
+      $level = auth_aclcheck($id,$who,$info['grps']);
+      if ($level >= AUTH_READ) {
+        if (strcasecmp($info['mail'],$conf['notify']) != 0) {
+          if (empty($emails)) {
+            $emails = $info['mail'];
+          } else {
+            $emails = "$emails,".$info['mail'];
+          }
+        }
+      }
+    }
+  }
+
+  return $emails;
+}
+
+/**
+ * Removes quoting backslashes
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ */
+function unslash($string,$char="'"){
+  return str_replace('\\'.$char,$char,$string);
+}
+
+//Setup VIM: ex: et ts=2 enc=utf-8 :