xref: /dokuwiki/inc/common.php (revision 40a0d685d578c360d245e98c8ca217953b8b765a) 
1<?php
2/**
3 * Common DokuWiki functions
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8
9  if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../').'/');
10  require_once(DOKU_CONF.'dokuwiki.php');
11  require_once(DOKU_INC.'inc/io.php');
12  require_once(DOKU_INC.'inc/changelog.php');
13  require_once(DOKU_INC.'inc/utf8.php');
14  require_once(DOKU_INC.'inc/mail.php');
15  require_once(DOKU_INC.'inc/parserutils.php');
16
17/**
18 * These constants are used with the recents function
19 */
20define('RECENTS_SKIP_DELETED',2);
21define('RECENTS_SKIP_MINORS',4);
22define('RECENTS_SKIP_SUBSPACES',8);
23
24/**
25 * Wrapper around htmlspecialchars()
26 *
27 * @author Andreas Gohr <andi@splitbrain.org>
28 * @see    htmlspecialchars()
29 */
30function hsc($string){
31  return htmlspecialchars($string, ENT_QUOTES, 'UTF-8');
32}
33
34/**
35 * print a newline terminated string
36 *
37 * You can give an indention as optional parameter
38 *
39 * @author Andreas Gohr <andi@splitbrain.org>
40 */
41function ptln($string,$intend=0){
42  for($i=0; $i<$intend; $i++) print ' ';
43  print"$string\n";
44}
45
46/**
47 * Return info about the current document as associative
48 * array.
49 *
50 * @author Andreas Gohr <andi@splitbrain.org>
51 */
52function pageinfo(){
53  global $ID;
54  global $REV;
55  global $USERINFO;
56  global $conf;
57
58  if($_SERVER['REMOTE_USER']){
59    $info['userinfo']   = $USERINFO;
60    $info['perm']       = auth_quickaclcheck($ID);
61    $info['subscribed'] = is_subscribed($ID,$_SERVER['REMOTE_USER']);
62    $info['client']     = $_SERVER['REMOTE_USER'];
63
64    // if some outside auth were used only REMOTE_USER is set
65    if(!$info['userinfo']['name']){
66      $info['userinfo']['name'] = $_SERVER['REMOTE_USER'];
67    }
68
69  }else{
70    $info['perm']       = auth_aclcheck($ID,'',null);
71    $info['subscribed'] = false;
72    $info['client']     = clientIP(true);
73  }
74
75  $info['namespace'] = getNS($ID);
76  $info['locked']    = checklock($ID);
77  $info['filepath']  = realpath(wikiFN($ID,$REV));
78  $info['exists']    = @file_exists($info['filepath']);
79  if($REV && !$info['exists']){
80    //check if current revision was meant
81    $cur = wikiFN($ID);
82    if(@file_exists($cur) && (@filemtime($cur) == $REV)){
83      $info['filepath'] = realpath($cur);
84      $info['exists']   = true;
85      $REV = '';
86    }
87  }
88  $info['rev'] = $REV;
89  if($info['exists']){
90    $info['writable'] = (is_writable($info['filepath']) &&
91                         ($info['perm'] >= AUTH_EDIT));
92  }else{
93    $info['writable'] = ($info['perm'] >= AUTH_CREATE);
94  }
95  $info['editable']  = ($info['writable'] && empty($info['lock']));
96  $info['lastmod']   = @filemtime($info['filepath']);
97
98  //load page meta data
99  $info['meta'] = p_get_metadata($ID);
100
101  //who's the editor
102  if($REV){
103    $revinfo = getRevisionInfo($ID, $REV, 1024);
104  }else{
105    $revinfo = $info['meta']['last_change'];
106  }
107  $info['ip']     = $revinfo['ip'];
108  $info['user']   = $revinfo['user'];
109  $info['sum']    = $revinfo['sum'];
110  // See also $INFO['meta']['last_change'] which is the most recent log line for page $ID.
111  // Use $INFO['meta']['last_change']['type']==='e' in place of $info['minor'].
112
113  if($revinfo['user']){
114    $info['editor'] = $revinfo['user'];
115  }else{
116    $info['editor'] = $revinfo['ip'];
117  }
118
119  // draft
120  $draft = getCacheName($info['client'].$ID,'.draft');
121  if(@file_exists($draft)){
122    if(@filemtime($draft) < @filemtime(wikiFN($ID))){
123      // remove stale draft
124      @unlink($draft);
125    }else{
126      $info['draft'] = $draft;
127    }
128  }
129
130  return $info;
131}
132
133/**
134 * Build an string of URL parameters
135 *
136 * @author Andreas Gohr
137 */
138function buildURLparams($params, $sep='&amp;'){
139  $url = '';
140  $amp = false;
141  foreach($params as $key => $val){
142    if($amp) $url .= $sep;
143
144    $url .= $key.'=';
145    $url .= rawurlencode($val);
146    $amp = true;
147  }
148  return $url;
149}
150
151/**
152 * Build an string of html tag attributes
153 *
154 * Skips keys starting with '_', values get HTML encoded
155 *
156 * @author Andreas Gohr
157 */
158function buildAttributes($params){
159  $url = '';
160  foreach($params as $key => $val){
161    if($key{0} == '_') continue;
162
163    $url .= $key.'="';
164    $url .= htmlspecialchars ($val);
165    $url .= '" ';
166  }
167  return $url;
168}
169
170
171/**
172 * print a message
173 *
174 * If HTTP headers were not sent yet the message is added
175 * to the global message array else it's printed directly
176 * using html_msgarea()
177 *
178 *
179 * Levels can be:
180 *
181 * -1 error
182 *  0 info
183 *  1 success
184 *
185 * @author Andreas Gohr <andi@splitbrain.org>
186 * @see    html_msgarea
187 */
188function msg($message,$lvl=0,$line='',$file=''){
189  global $MSG;
190  $errors[-1] = 'error';
191  $errors[0]  = 'info';
192  $errors[1]  = 'success';
193
194  if($line || $file) $message.=' ['.basename($file).':'.$line.']';
195
196  if(!headers_sent()){
197    if(!isset($MSG)) $MSG = array();
198    $MSG[]=array('lvl' => $errors[$lvl], 'msg' => $message);
199  }else{
200    $MSG = array();
201    $MSG[]=array('lvl' => $errors[$lvl], 'msg' => $message);
202    if(function_exists('html_msgarea')){
203      html_msgarea();
204    }else{
205      print "ERROR($lvl) $message";
206    }
207  }
208}
209
210/**
211 * This builds the breadcrumb trail and returns it as array
212 *
213 * @author Andreas Gohr <andi@splitbrain.org>
214 */
215function breadcrumbs(){
216  // we prepare the breadcrumbs early for quick session closing
217  static $crumbs = null;
218  if($crumbs != null) return $crumbs;
219
220  global $ID;
221  global $ACT;
222  global $conf;
223  $crumbs = $_SESSION[$conf['title']]['bc'];
224
225  //first visit?
226  if (!is_array($crumbs)){
227    $crumbs = array();
228  }
229  //we only save on show and existing wiki documents
230  $file = wikiFN($ID);
231  if($ACT != 'show' || !@file_exists($file)){
232    $_SESSION[$conf['title']]['bc'] = $crumbs;
233    return $crumbs;
234  }
235
236  // page names
237  $name = noNS($ID);
238  if ($conf['useheading']) {
239    // get page title
240    $title = p_get_first_heading($ID);
241    if ($title) {
242      $name = $title;
243    }
244  }
245
246  //remove ID from array
247  if (isset($crumbs[$ID])) {
248    unset($crumbs[$ID]);
249  }
250
251  //add to array
252  $crumbs[$ID] = $name;
253  //reduce size
254  while(count($crumbs) > $conf['breadcrumbs']){
255    array_shift($crumbs);
256  }
257  //save to session
258  $_SESSION[$conf['title']]['bc'] = $crumbs;
259  return $crumbs;
260}
261
262/**
263 * Filter for page IDs
264 *
265 * This is run on a ID before it is outputted somewhere
266 * currently used to replace the colon with something else
267 * on Windows systems and to have proper URL encoding
268 *
269 * Urlencoding is ommitted when the second parameter is false
270 *
271 * @author Andreas Gohr <andi@splitbrain.org>
272 */
273function idfilter($id,$ue=true){
274  global $conf;
275  if ($conf['useslash'] && $conf['userewrite']){
276    $id = strtr($id,':','/');
277  }elseif (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' &&
278      $conf['userewrite']) {
279    $id = strtr($id,':',';');
280  }
281  if($ue){
282    $id = rawurlencode($id);
283    $id = str_replace('%3A',':',$id); //keep as colon
284    $id = str_replace('%2F','/',$id); //keep as slash
285  }
286  return $id;
287}
288
289/**
290 * This builds a link to a wikipage
291 *
292 * It handles URL rewriting and adds additional parameter if
293 * given in $more
294 *
295 * @author Andreas Gohr <andi@splitbrain.org>
296 */
297function wl($id='',$more='',$abs=false,$sep='&amp;'){
298  global $conf;
299  if(is_array($more)){
300    $more = buildURLparams($more,$sep);
301  }else{
302    $more = str_replace(',',$sep,$more);
303  }
304
305  $id    = idfilter($id);
306  if($abs){
307    $xlink = DOKU_URL;
308  }else{
309    $xlink = DOKU_BASE;
310  }
311
312  if($conf['userewrite'] == 2){
313    $xlink .= DOKU_SCRIPT.'/'.$id;
314    if($more) $xlink .= '?'.$more;
315  }elseif($conf['userewrite']){
316    $xlink .= $id;
317    if($more) $xlink .= '?'.$more;
318  }else{
319    $xlink .= DOKU_SCRIPT.'?id='.$id;
320    if($more) $xlink .= $sep.$more;
321  }
322
323  return $xlink;
324}
325
326/**
327 * This builds a link to an alternate page format
328 *
329 * Handles URL rewriting if enabled. Follows the style of wl().
330 *
331 * @author Ben Coburn <btcoburn@silicodon.net>
332 */
333function exportlink($id='',$format='raw',$more='',$abs=false,$sep='&amp;'){
334  global $conf;
335  if(is_array($more)){
336    $more = buildURLparams($more,$sep);
337  }else{
338    $more = str_replace(',',$sep,$more);
339  }
340
341  $format = rawurlencode($format);
342  $id = idfilter($id);
343  if($abs){
344    $xlink = DOKU_URL;
345  }else{
346    $xlink = DOKU_BASE;
347  }
348
349  if($conf['userewrite'] == 2){
350    $xlink .= DOKU_SCRIPT.'/'.$id.'?do=export_'.$format;
351    if($more) $xlink .= $sep.$more;
352  }elseif($conf['userewrite'] == 1){
353    $xlink .= '_export/'.$format.'/'.$id;
354    if($more) $xlink .= '?'.$more;
355  }else{
356    $xlink .= DOKU_SCRIPT.'?do=export_'.$format.$sep.'id='.$id;
357    if($more) $xlink .= $sep.$more;
358  }
359
360  return $xlink;
361}
362
363/**
364 * Build a link to a media file
365 *
366 * Will return a link to the detail page if $direct is false
367 */
368function ml($id='',$more='',$direct=true,$sep='&amp;'){
369  global $conf;
370  if(is_array($more)){
371    $more = buildURLparams($more,$sep);
372  }else{
373    $more = str_replace(',',$sep,$more);
374  }
375
376  $xlink = DOKU_BASE;
377
378  // external URLs are always direct without rewriting
379  if(preg_match('#^(https?|ftp)://#i',$id)){
380    $xlink .= 'lib/exe/fetch.php';
381    if($more){
382      $xlink .= '?'.$more;
383      $xlink .= $sep.'media='.rawurlencode($id);
384    }else{
385      $xlink .= '?media='.rawurlencode($id);
386    }
387    return $xlink;
388  }
389
390  $id = idfilter($id);
391
392  // decide on scriptname
393  if($direct){
394    if($conf['userewrite'] == 1){
395      $script = '_media';
396    }else{
397      $script = 'lib/exe/fetch.php';
398    }
399  }else{
400    if($conf['userewrite'] == 1){
401      $script = '_detail';
402    }else{
403      $script = 'lib/exe/detail.php';
404    }
405  }
406
407  // build URL based on rewrite mode
408   if($conf['userewrite']){
409     $xlink .= $script.'/'.$id;
410     if($more) $xlink .= '?'.$more;
411   }else{
412     if($more){
413       $xlink .= $script.'?'.$more;
414       $xlink .= $sep.'media='.$id;
415     }else{
416       $xlink .= $script.'?media='.$id;
417     }
418   }
419
420  return $xlink;
421}
422
423
424
425/**
426 * Just builds a link to a script
427 *
428 * @todo   maybe obsolete
429 * @author Andreas Gohr <andi@splitbrain.org>
430 */
431function script($script='doku.php'){
432#  $link = getBaseURL();
433#  $link .= $script;
434#  return $link;
435  return DOKU_BASE.DOKU_SCRIPT;
436}
437
438/**
439 * Spamcheck against wordlist
440 *
441 * Checks the wikitext against a list of blocked expressions
442 * returns true if the text contains any bad words
443 *
444 * @author Andreas Gohr <andi@splitbrain.org>
445 */
446function checkwordblock(){
447  global $TEXT;
448  global $conf;
449
450  if(!$conf['usewordblock']) return false;
451
452  $wordblocks = getWordblocks();
453  //how many lines to read at once (to work around some PCRE limits)
454  if(version_compare(phpversion(),'4.3.0','<')){
455    //old versions of PCRE define a maximum of parenthesises even if no
456    //backreferences are used - the maximum is 99
457    //this is very bad performancewise and may even be too high still
458    $chunksize = 40;
459  }else{
460    //read file in chunks of 600 - this should work around the
461    //MAX_PATTERN_SIZE in modern PCRE
462    $chunksize = 400;
463  }
464  while($blocks = array_splice($wordblocks,0,$chunksize)){
465    $re = array();
466    #build regexp from blocks
467    foreach($blocks as $block){
468      $block = preg_replace('/#.*$/','',$block);
469      $block = trim($block);
470      if(empty($block)) continue;
471      $re[]  = $block;
472    }
473    if(preg_match('#('.join('|',$re).')#si',$TEXT, $match=array())) {
474      return true;
475    }
476  }
477  return false;
478}
479
480/**
481 * Return the IP of the client
482 *
483 * Honours X-Forwarded-For and X-Real-IP Proxy Headers
484 *
485 * It returns a comma separated list of IPs if the above mentioned
486 * headers are set. If the single parameter is set, it tries to return
487 * a routable public address, prefering the ones suplied in the X
488 * headers
489 *
490 * @param  boolean $single If set only a single IP is returned
491 * @author Andreas Gohr <andi@splitbrain.org>
492 */
493function clientIP($single=false){
494  $ip = array();
495  $ip[] = $_SERVER['REMOTE_ADDR'];
496  if($_SERVER['HTTP_X_FORWARDED_FOR'])
497    $ip = array_merge($ip,explode(',',$_SERVER['HTTP_X_FORWARDED_FOR']));
498  if($_SERVER['HTTP_X_REAL_IP'])
499    $ip = array_merge($ip,explode(',',$_SERVER['HTTP_X_REAL_IP']));
500
501  // remove any non-IP stuff
502  $cnt = count($ip);
503  $match = array();
504  for($i=0; $i<$cnt; $i++){
505    if(preg_match('/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/',$ip[$i],$match)) {
506      $ip[$i] = $match[0];
507    } else {
508      $ip[$i] = '';
509    }
510    if(empty($ip[$i])) unset($ip[$i]);
511  }
512  $ip = array_values(array_unique($ip));
513  if(!$ip[0]) $ip[0] = '0.0.0.0'; // for some strange reason we don't have a IP
514
515  if(!$single) return join(',',$ip);
516
517  // decide which IP to use, trying to avoid local addresses
518  $ip = array_reverse($ip);
519  foreach($ip as $i){
520    if(preg_match('/^(127\.|10\.|192\.168\.|172\.((1[6-9])|(2[0-9])|(3[0-1]))\.)/',$i)){
521      continue;
522    }else{
523      return $i;
524    }
525  }
526  // still here? just use the first (last) address
527  return $ip[0];
528}
529
530/**
531 * Checks if a given page is currently locked.
532 *
533 * removes stale lockfiles
534 *
535 * @author Andreas Gohr <andi@splitbrain.org>
536 */
537function checklock($id){
538  global $conf;
539  $lock = wikiLockFN($id);
540
541  //no lockfile
542  if(!@file_exists($lock)) return false;
543
544  //lockfile expired
545  if((time() - filemtime($lock)) > $conf['locktime']){
546    @unlink($lock);
547    return false;
548  }
549
550  //my own lock
551  $ip = io_readFile($lock);
552  if( ($ip == clientIP()) || ($ip == $_SERVER['REMOTE_USER']) ){
553    return false;
554  }
555
556  return $ip;
557}
558
559/**
560 * Lock a page for editing
561 *
562 * @author Andreas Gohr <andi@splitbrain.org>
563 */
564function lock($id){
565  $lock = wikiLockFN($id);
566  if($_SERVER['REMOTE_USER']){
567    io_saveFile($lock,$_SERVER['REMOTE_USER']);
568  }else{
569    io_saveFile($lock,clientIP());
570  }
571}
572
573/**
574 * Unlock a page if it was locked by the user
575 *
576 * @author Andreas Gohr <andi@splitbrain.org>
577 * @return bool true if a lock was removed
578 */
579function unlock($id){
580  $lock = wikiLockFN($id);
581  if(@file_exists($lock)){
582    $ip = io_readFile($lock);
583    if( ($ip == clientIP()) || ($ip == $_SERVER['REMOTE_USER']) ){
584      @unlink($lock);
585      return true;
586    }
587  }
588  return false;
589}
590
591/**
592 * convert line ending to unix format
593 *
594 * @see    formText() for 2crlf conversion
595 * @author Andreas Gohr <andi@splitbrain.org>
596 */
597function cleanText($text){
598  $text = preg_replace("/(\015\012)|(\015)/","\012",$text);
599  return $text;
600}
601
602/**
603 * Prepares text for print in Webforms by encoding special chars.
604 * It also converts line endings to Windows format which is
605 * pseudo standard for webforms.
606 *
607 * @see    cleanText() for 2unix conversion
608 * @author Andreas Gohr <andi@splitbrain.org>
609 */
610function formText($text){
611  $text = preg_replace("/\012/","\015\012",$text);
612  return htmlspecialchars($text);
613}
614
615/**
616 * Returns the specified local text in raw format
617 *
618 * @author Andreas Gohr <andi@splitbrain.org>
619 */
620function rawLocale($id){
621  return io_readFile(localeFN($id));
622}
623
624/**
625 * Returns the raw WikiText
626 *
627 * @author Andreas Gohr <andi@splitbrain.org>
628 */
629function rawWiki($id,$rev=''){
630  return io_readWikiPage(wikiFN($id, $rev), $id, $rev);
631}
632
633/**
634 * Returns the pagetemplate contents for the ID's namespace
635 *
636 * @author Andreas Gohr <andi@splitbrain.org>
637 */
638function pageTemplate($data){
639  $id = $data[0];
640  global $conf;
641  global $INFO;
642  $tpl = io_readFile(dirname(wikiFN($id)).'/_template.txt');
643  $tpl = str_replace('@ID@',$id,$tpl);
644  $tpl = str_replace('@NS@',getNS($id),$tpl);
645  $tpl = str_replace('@PAGE@',strtr(noNS($id),'_',' '),$tpl);
646  $tpl = str_replace('@USER@',$_SERVER['REMOTE_USER'],$tpl);
647  $tpl = str_replace('@NAME@',$INFO['userinfo']['name'],$tpl);
648  $tpl = str_replace('@MAIL@',$INFO['userinfo']['mail'],$tpl);
649  $tpl = str_replace('@DATE@',date($conf['dformat']),$tpl);
650  return $tpl;
651}
652
653
654/**
655 * Returns the raw Wiki Text in three slices.
656 *
657 * The range parameter needs to have the form "from-to"
658 * and gives the range of the section in bytes - no
659 * UTF-8 awareness is needed.
660 * The returned order is prefix, section and suffix.
661 *
662 * @author Andreas Gohr <andi@splitbrain.org>
663 */
664function rawWikiSlices($range,$id,$rev=''){
665  list($from,$to) = split('-',$range,2);
666  $text = io_readWikiPage(wikiFN($id, $rev), $id, $rev);
667  if(!$from) $from = 0;
668  if(!$to)   $to   = strlen($text)+1;
669
670  $slices[0] = substr($text,0,$from-1);
671  $slices[1] = substr($text,$from-1,$to-$from);
672  $slices[2] = substr($text,$to);
673
674  return $slices;
675}
676
677/**
678 * Joins wiki text slices
679 *
680 * function to join the text slices with correct lineendings again.
681 * When the pretty parameter is set to true it adds additional empty
682 * lines between sections if needed (used on saving).
683 *
684 * @author Andreas Gohr <andi@splitbrain.org>
685 */
686function con($pre,$text,$suf,$pretty=false){
687
688  if($pretty){
689    if($pre && substr($pre,-1) != "\n") $pre .= "\n";
690    if($suf && substr($text,-1) != "\n") $text .= "\n";
691  }
692
693  if($pre) $pre .= "\n";
694  if($suf) $text .= "\n";
695  return $pre.$text.$suf;
696}
697
698/**
699 * print debug messages
700 *
701 * little function to print the content of a var
702 *
703 * @author Andreas Gohr <andi@splitbrain.org>
704 */
705function dbg($msg,$hidden=false){
706  (!$hidden) ? print '<pre class="dbg">' : print "<!--\n";
707  print_r($msg);
708  (!$hidden) ? print '</pre>' : print "\n-->";
709}
710
711/**
712 * Print info to a log file
713 *
714 * @author Andreas Gohr <andi@splitbrain.org>
715 */
716function dbglog($msg){
717  global $conf;
718  $file = $conf['cachedir'].'/debug.log';
719  $fh = fopen($file,'a');
720  if($fh){
721    fwrite($fh,date('H:i:s ').$_SERVER['REMOTE_ADDR'].': '.$msg."\n");
722    fclose($fh);
723  }
724}
725
726/**
727 * Saves a wikitext by calling io_writeWikiPage
728 *
729 * @author Andreas Gohr <andi@splitbrain.org>
730 * @author Ben Coburn <btcoburn@silicodon.net>
731 */
732function saveWikiText($id,$text,$summary,$minor=false){
733  global $conf;
734  global $lang;
735  global $REV;
736  // ignore if no changes were made
737  if($text == rawWiki($id,'')){
738    return;
739  }
740
741  $file = wikiFN($id);
742  $old  = saveOldRevision($id);
743  $wasRemoved = empty($text);
744  $wasCreated = !@file_exists($file);
745  $wasReverted = ($REV==true);
746  $newRev = false;
747
748  if ($wasRemoved){
749    // pre-save deleted revision
750    @touch($file);
751    $newRev = saveOldRevision($id);
752    // remove empty file
753    @unlink($file);
754    // remove old meta info...
755    $mfiles = metaFiles($id);
756    $changelog = metaFN($id, '.changes');
757    foreach ($mfiles as $mfile) {
758      // but keep per-page changelog to preserve page history
759      if (@file_exists($mfile) && $mfile!==$changelog) { @unlink($mfile); }
760    }
761    $del = true;
762    // autoset summary on deletion
763    if(empty($summary)) $summary = $lang['deleted'];
764    // remove empty namespaces
765    io_sweepNS($id, 'datadir');
766    io_sweepNS($id, 'mediadir');
767  }else{
768    // save file (namespace dir is created in io_writeWikiPage)
769    io_writeWikiPage($file, $text, $id);
770    $newRev = @filemtime($file);
771    $del = false;
772  }
773
774  // select changelog line type
775  $extra = '';
776  $type = 'E';
777  if ($wasReverted) {
778    $type = 'R';
779    $extra = $REV;
780  }
781  else if ($wasCreated) { $type = 'C'; }
782  else if ($wasRemoved) { $type = 'D'; }
783  else if ($minor && $conf['useacl'] && $_SERVER['REMOTE_USER']) { $type = 'e'; } //minor edits only for logged in users
784
785  addLogEntry($newRev, $id, $type, $summary, $extra);
786  // send notify mails
787  notify($id,'admin',$old,$summary,$minor);
788  notify($id,'subscribers',$old,$summary,$minor);
789
790  //purge cache on add by updating the purgefile
791  if($conf['purgeonadd'] && (!$old || $del)){
792    io_saveFile($conf['cachedir'].'/purgefile',time());
793  }
794}
795
796/**
797 * moves the current version to the attic and returns its
798 * revision date
799 *
800 * @author Andreas Gohr <andi@splitbrain.org>
801 */
802function saveOldRevision($id){
803  global $conf;
804  $oldf = wikiFN($id);
805  if(!@file_exists($oldf)) return '';
806  $date = filemtime($oldf);
807  $newf = wikiFN($id,$date);
808  io_writeWikiPage($newf, rawWiki($id), $id, $date);
809  return $date;
810}
811
812/**
813 * Sends a notify mail on page change
814 *
815 * @param  string  $id       The changed page
816 * @param  string  $who      Who to notify (admin|subscribers)
817 * @param  int     $rev      Old page revision
818 * @param  string  $summary  What changed
819 * @param  boolean $minor    Is this a minor edit?
820 * @param  array   $replace  Additional string substitutions, @KEY@ to be replaced by value
821 *
822 * @author Andreas Gohr <andi@splitbrain.org>
823 */
824function notify($id,$who,$rev='',$summary='',$minor=false,$replace=array()){
825  global $lang;
826  global $conf;
827
828  // decide if there is something to do
829  if($who == 'admin'){
830    if(empty($conf['notify'])) return; //notify enabled?
831    $text = rawLocale('mailtext');
832    $to   = $conf['notify'];
833    $bcc  = '';
834  }elseif($who == 'subscribers'){
835    if(!$conf['subscribers']) return; //subscribers enabled?
836    if($conf['useacl'] && $_SERVER['REMOTE_USER'] && $minor) return; //skip minors
837    $bcc  = subscriber_addresslist($id);
838    if(empty($bcc)) return;
839    $to   = '';
840    $text = rawLocale('subscribermail');
841  }elseif($who == 'register'){
842    if(empty($conf['registernotify'])) return;
843    $text = rawLocale('registermail');
844    $to   = $conf['registernotify'];
845    $bcc  = '';
846  }else{
847    return; //just to be safe
848  }
849
850  $text = str_replace('@DATE@',date($conf['dformat']),$text);
851  $text = str_replace('@BROWSER@',$_SERVER['HTTP_USER_AGENT'],$text);
852  $text = str_replace('@IPADDRESS@',$_SERVER['REMOTE_ADDR'],$text);
853  $text = str_replace('@HOSTNAME@',gethostbyaddr($_SERVER['REMOTE_ADDR']),$text);
854  $text = str_replace('@NEWPAGE@',wl($id,'',true),$text);
855  $text = str_replace('@PAGE@',$id,$text);
856  $text = str_replace('@TITLE@',$conf['title'],$text);
857  $text = str_replace('@DOKUWIKIURL@',DOKU_URL,$text);
858  $text = str_replace('@SUMMARY@',$summary,$text);
859  $text = str_replace('@USER@',$_SERVER['REMOTE_USER'],$text);
860
861  foreach ($replace as $key => $substitution) {
862    $text = str_replace('@'.strtoupper($key).'@',$substitution, $text);
863  }
864
865  if($who == 'register'){
866    $subject = $lang['mail_new_user'].' '.$summary;
867  }elseif($rev){
868    $subject = $lang['mail_changed'].' '.$id;
869    $text = str_replace('@OLDPAGE@',wl($id,"rev=$rev",true),$text);
870    require_once(DOKU_INC.'inc/DifferenceEngine.php');
871    $df  = new Diff(split("\n",rawWiki($id,$rev)),
872                    split("\n",rawWiki($id)));
873    $dformat = new UnifiedDiffFormatter();
874    $diff    = $dformat->format($df);
875  }else{
876    $subject=$lang['mail_newpage'].' '.$id;
877    $text = str_replace('@OLDPAGE@','none',$text);
878    $diff = rawWiki($id);
879  }
880  $text = str_replace('@DIFF@',$diff,$text);
881  $subject = '['.$conf['title'].'] '.$subject;
882
883  mail_send($to,$subject,$text,$conf['mailfrom'],'',$bcc);
884}
885
886/**
887 * extracts the query from a google referer
888 *
889 * @todo   should be more generic and support yahoo et al
890 * @author Andreas Gohr <andi@splitbrain.org>
891 */
892function getGoogleQuery(){
893  $url = parse_url($_SERVER['HTTP_REFERER']);
894  if(!$url) return '';
895
896  if(!preg_match("#google\.#i",$url['host'])) return '';
897  $query = array();
898  parse_str($url['query'],$query);
899
900  return $query['q'];
901}
902
903/**
904 * Try to set correct locale
905 *
906 * @deprecated No longer used
907 * @author     Andreas Gohr <andi@splitbrain.org>
908 */
909function setCorrectLocale(){
910  global $conf;
911  global $lang;
912
913  $enc = strtoupper($lang['encoding']);
914  foreach ($lang['locales'] as $loc){
915    //try locale
916    if(@setlocale(LC_ALL,$loc)) return;
917    //try loceale with encoding
918    if(@setlocale(LC_ALL,"$loc.$enc")) return;
919  }
920  //still here? try to set from environment
921  @setlocale(LC_ALL,"");
922}
923
924/**
925 * Return the human readable size of a file
926 *
927 * @param       int    $size   A file size
928 * @param       int    $dec    A number of decimal places
929 * @author      Martin Benjamin <b.martin@cybernet.ch>
930 * @author      Aidan Lister <aidan@php.net>
931 * @version     1.0.0
932 */
933function filesize_h($size, $dec = 1){
934  $sizes = array('B', 'KB', 'MB', 'GB');
935  $count = count($sizes);
936  $i = 0;
937
938  while ($size >= 1024 && ($i < $count - 1)) {
939    $size /= 1024;
940    $i++;
941  }
942
943  return round($size, $dec) . ' ' . $sizes[$i];
944}
945
946/**
947 * return an obfuscated email address in line with $conf['mailguard'] setting
948 *
949 * @author Harry Fuecks <hfuecks@gmail.com>
950 * @author Christopher Smith <chris@jalakai.co.uk>
951 */
952function obfuscate($email) {
953  global $conf;
954
955  switch ($conf['mailguard']) {
956    case 'visible' :
957      $obfuscate = array('@' => ' [at] ', '.' => ' [dot] ', '-' => ' [dash] ');
958      return strtr($email, $obfuscate);
959
960    case 'hex' :
961      $encode = '';
962      for ($x=0; $x < strlen($email); $x++) $encode .= '&#x' . bin2hex($email{$x}).';';
963      return $encode;
964
965    case 'none' :
966    default :
967      return $email;
968  }
969}
970
971/**
972 * Return DokuWikis version
973 *
974 * @author Andreas Gohr <andi@splitbrain.org>
975 */
976function getVersion(){
977  //import version string
978  if(@file_exists('VERSION')){
979    //official release
980    return 'Release '.trim(io_readfile(DOKU_INC.'/VERSION'));
981  }elseif(is_dir('_darcs')){
982    //darcs checkout - read last 2000 bytes of inventory
983    $sz   = filesize('_darcs/inventory');
984    $seek = max(0,$sz-2000);
985    $fh   = fopen('_darcs/inventory','rb');
986    fseek($fh,$seek);
987    $chunk = fread($fh,2000);
988    fclose($fh);
989    $inv = preg_grep('#\*\*\d{14}[\]$]#',explode("\n",$chunk));
990    $cur = array_pop($inv);
991    preg_match('#\*\*(\d{4})(\d{2})(\d{2})#',$cur,$matches);
992    return 'Darcs '.$matches[1].'-'.$matches[2].'-'.$matches[3];
993  }else{
994    return 'snapshot?';
995  }
996}
997
998/**
999 * Run a few sanity checks
1000 *
1001 * @author Andreas Gohr <andi@splitbrain.org>
1002 */
1003function check(){
1004  global $conf;
1005  global $INFO;
1006
1007  msg('DokuWiki version: '.getVersion(),1);
1008
1009  if(version_compare(phpversion(),'4.3.0','<')){
1010    msg('Your PHP version is too old ('.phpversion().' vs. 4.3.+ recommended)',-1);
1011  }elseif(version_compare(phpversion(),'4.3.10','<')){
1012    msg('Consider upgrading PHP to 4.3.10 or higher for security reasons (your version: '.phpversion().')',0);
1013  }else{
1014    msg('PHP version '.phpversion(),1);
1015  }
1016
1017  if(is_writable($conf['changelog'])){
1018    msg('Changelog is writable',1);
1019  }else{
1020    if (@file_exists($conf['changelog'])) {
1021      msg('Changelog is not writable',-1);
1022    }
1023  }
1024
1025  if (isset($conf['changelog_old']) && @file_exists($conf['changelog_old'])) {
1026    msg('Old changelog exists.', 0);
1027  }
1028
1029  if (@file_exists($conf['changelog'].'_failed')) {
1030    msg('Importing old changelog failed.', -1);
1031  } else if (@file_exists($conf['changelog'].'_importing')) {
1032    msg('Importing old changelog now.', 0);
1033  } else if (@file_exists($conf['changelog'].'_import_ok')) {
1034    msg('Old changelog imported.', 1);
1035    if (!plugin_isdisabled('importoldchangelog')) {
1036      msg('Importoldchangelog plugin not disabled after import.', -1);
1037    }
1038  }
1039
1040  if(is_writable($conf['datadir'])){
1041    msg('Datadir is writable',1);
1042  }else{
1043    msg('Datadir is not writable',-1);
1044  }
1045
1046  if(is_writable($conf['olddir'])){
1047    msg('Attic is writable',1);
1048  }else{
1049    msg('Attic is not writable',-1);
1050  }
1051
1052  if(is_writable($conf['mediadir'])){
1053    msg('Mediadir is writable',1);
1054  }else{
1055    msg('Mediadir is not writable',-1);
1056  }
1057
1058  if(is_writable($conf['cachedir'])){
1059    msg('Cachedir is writable',1);
1060  }else{
1061    msg('Cachedir is not writable',-1);
1062  }
1063
1064  if(is_writable($conf['lockdir'])){
1065    msg('Lockdir is writable',1);
1066  }else{
1067    msg('Lockdir is not writable',-1);
1068  }
1069
1070  if(is_writable(DOKU_CONF.'users.auth.php')){
1071    msg('conf/users.auth.php is writable',1);
1072  }else{
1073    msg('conf/users.auth.php is not writable',0);
1074  }
1075
1076  if(function_exists('mb_strpos')){
1077    if(defined('UTF8_NOMBSTRING')){
1078      msg('mb_string extension is available but will not be used',0);
1079    }else{
1080      msg('mb_string extension is available and will be used',1);
1081    }
1082  }else{
1083    msg('mb_string extension not available - PHP only replacements will be used',0);
1084  }
1085
1086  if($conf['allowdebug']){
1087    msg('Debugging support is enabled. If you don\'t need it you should set $conf[\'allowdebug\'] = 0',-1);
1088  }else{
1089    msg('Debugging support is disabled',1);
1090  }
1091
1092  msg('Your current permission for this page is '.$INFO['perm'],0);
1093
1094  if(is_writable($INFO['filepath'])){
1095    msg('The current page is writable by the webserver',0);
1096  }else{
1097    msg('The current page is not writable by the webserver',0);
1098  }
1099
1100  if($INFO['writable']){
1101    msg('The current page is writable by you',0);
1102  }else{
1103    msg('The current page is not writable you',0);
1104  }
1105}
1106
1107/**
1108 * Let us know if a user is tracking a page
1109 *
1110 * @author Andreas Gohr <andi@splitbrain.org>
1111 */
1112function is_subscribed($id,$uid){
1113  $file=metaFN($id,'.mlist');
1114  if (@file_exists($file)) {
1115    $mlist = file($file);
1116    $pos = array_search($uid."\n",$mlist);
1117    return is_int($pos);
1118  }
1119
1120  return false;
1121}
1122
1123/**
1124 * Return a string with the email addresses of all the
1125 * users subscribed to a page
1126 *
1127 * @author Steven Danz <steven-danz@kc.rr.com>
1128 */
1129function subscriber_addresslist($id){
1130  global $conf;
1131  global $auth;
1132
1133  $emails = '';
1134
1135  if (!$conf['subscribers']) return;
1136
1137  $mlist = array();
1138  $file=metaFN($id,'.mlist');
1139  if (@file_exists($file)) {
1140    $mlist = file($file);
1141  }
1142  if(count($mlist) > 0) {
1143    foreach ($mlist as $who) {
1144      $who = rtrim($who);
1145      $info = $auth->getUserData($who);
1146      $level = auth_aclcheck($id,$who,$info['grps']);
1147      if ($level >= AUTH_READ) {
1148        if (strcasecmp($info['mail'],$conf['notify']) != 0) {
1149          if (empty($emails)) {
1150            $emails = $info['mail'];
1151          } else {
1152            $emails = "$emails,".$info['mail'];
1153          }
1154        }
1155      }
1156    }
1157  }
1158
1159  return $emails;
1160}
1161
1162/**
1163 * Removes quoting backslashes
1164 *
1165 * @author Andreas Gohr <andi@splitbrain.org>
1166 */
1167function unslash($string,$char="'"){
1168  return str_replace('\\'.$char,$char,$string);
1169}
1170
1171//Setup VIM: ex: et ts=2 enc=utf-8 :
1172