xref: /dokuwiki/inc/search.php (revision 90fb952c4c30c09c8446076ba05991c89a3f0b01) 
1<?php
2/**
3 * DokuWiki search functions
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8use dokuwiki\Utf8\PhpString;
9use dokuwiki\File\MediaFile;
10use dokuwiki\Utf8\Sort;
11
12/**
13 * Recurse directory
14 *
15 * This function recurses into a given base directory
16 * and calls the supplied function for each file and directory
17 *
18 * @param   array    &$data The results of the search are stored here
19 * @param   string    $base Where to start the search
20 * @param   callback  $func Callback (function name or array with object,method)
21 * @param   array     $opts option array will be given to the Callback
22 * @param   string    $dir  Current directory beyond $base
23 * @param   int       $lvl  Recursion Level
24 * @param   mixed     $sort 'natural' to use natural order sorting (default);
25 *                          'date' to sort by filemtime; leave empty to skip sorting.
26 * @author  Andreas Gohr <andi@splitbrain.org>
27 */
28function search(&$data, $base, $func, $opts, $dir = '', $lvl = 1, $sort = 'natural')
29{
30    $dirs   = [];
31    $files  = [];
32    $filepaths = [];
33
34    // safeguard against runaways #1452
35    if ($base == '' || $base == '/') {
36        throw new RuntimeException('No valid $base passed to search() - possible misconfiguration or bug');
37    }
38
39    //read in directories and files
40    $dh = @opendir($base . '/' . $dir);
41    if (!$dh) return;
42    while (($file = readdir($dh)) !== false) {
43        if (preg_match('/^[\._]/', $file)) continue; //skip hidden files and upper dirs
44        if (is_dir($base . '/' . $dir . '/' . $file)) {
45            $dirs[] = $dir . '/' . $file;
46            continue;
47        }
48        $files[] = $dir . '/' . $file;
49        $filepaths[] = $base . '/' . $dir . '/' . $file;
50    }
51    closedir($dh);
52    if (!empty($sort)) {
53        if ($sort == 'date') {
54            @array_multisort(array_map('filemtime', $filepaths), SORT_NUMERIC, SORT_DESC, $files);
55        } else /* natural */ {
56            Sort::asortFN($files);
57        }
58        Sort::asortFN($dirs);
59    }
60
61    //give directories to userfunction then recurse
62    foreach ($dirs as $dir) {
63        if (call_user_func_array($func, [&$data, $base, $dir, 'd', $lvl, $opts])) {
64            search($data, $base, $func, $opts, $dir, $lvl + 1, $sort);
65        }
66    }
67    //now handle the files
68    foreach ($files as $file) {
69        call_user_func_array($func, [&$data, $base, $file, 'f', $lvl, $opts]);
70    }
71}
72
73/**
74 * The following functions are userfunctions to use with the search
75 * function above. This function is called for every found file or
76 * directory. When a directory is given to the function it has to
77 * decide if this directory should be traversed (true) or not (false)
78 * The function has to accept the following parameters:
79 *
80 * array &$data  - Reference to the result data structure
81 * string $base  - Base usually $conf['datadir']
82 * string $file  - current file or directory relative to $base
83 * string $type  - Type either 'd' for directory or 'f' for file
84 * int    $lvl   - Current recursion depht
85 * array  $opts  - option array as given to search()
86 *
87 * return values for files are ignored
88 *
89 * All functions should check the ACL for document READ rights
90 * namespaces (directories) are NOT checked (when sneaky_index is 0) as this
91 * would break the recursion (You can have an nonreadable dir over a readable
92 * one deeper nested) also make sure to check the file type (for example
93 * in case of lockfiles).
94 */
95
96/**
97 * Searches for pages beginning with the given query
98 *
99 * @author Andreas Gohr <andi@splitbrain.org>
100 *
101 * @param array $data
102 * @param string $base
103 * @param string $file
104 * @param string $type
105 * @param integer $lvl
106 * @param array $opts
107 *
108 * @return bool
109 */
110function search_qsearch(&$data, $base, $file, $type, $lvl, $opts)
111{
112    $opts = [
113        'idmatch'   => '(^|:)' . preg_quote($opts['query'], '/') . '/',
114        'listfiles' => true,
115        'pagesonly' => true
116    ];
117    return search_universal($data, $base, $file, $type, $lvl, $opts);
118}
119
120/**
121 * Build the browsable index of pages
122 *
123 * $opts['ns'] is the currently viewed namespace
124 *
125 * @author  Andreas Gohr <andi@splitbrain.org>
126 *
127 * @param array $data
128 * @param string $base
129 * @param string $file
130 * @param string $type
131 * @param integer $lvl
132 * @param array $opts
133 *
134 * @return bool
135 */
136function search_index(&$data, $base, $file, $type, $lvl, $opts)
137{
138    global $conf;
139    $ns = $opts['ns'] ?? '';
140    $opts = [
141        'pagesonly' => true,
142        'listdirs' => true,
143        'listfiles' => empty($opts['nofiles']),
144        'sneakyacl' => $conf['sneaky_index'],
145        // Hacky, should rather use recmatch
146        'depth' => preg_match('#^' . preg_quote($file, '#') . '(/|$)#', '/' . $ns) ? 0 : -1,
147    ];
148
149    return search_universal($data, $base, $file, $type, $lvl, $opts);
150}
151
152/**
153 * List all namespaces
154 *
155 * @author  Andreas Gohr <andi@splitbrain.org>
156 *
157 * @param array $data
158 * @param string $base
159 * @param string $file
160 * @param string $type
161 * @param integer $lvl
162 * @param array $opts
163 *
164 * @return bool
165 */
166function search_namespaces(&$data, $base, $file, $type, $lvl, $opts)
167{
168    $opts = ['listdirs' => true];
169    return search_universal($data, $base, $file, $type, $lvl, $opts);
170}
171
172/**
173 * List all mediafiles in a namespace
174 *   $opts['depth']     recursion level, 0 for all
175 *   $opts['showmsg']   shows message if invalid media id is used
176 *   $opts['skipacl']   skip acl checking
177 *   $opts['pattern']   check given pattern
178 *   $opts['hash']      add hashes to result list
179 *
180 * @author  Andreas Gohr <andi@splitbrain.org>
181 *
182 * @param array $data
183 * @param string $base
184 * @param string $file
185 * @param string $type
186 * @param integer $lvl
187 * @param array $opts
188 *
189 * @return bool
190 */
191function search_media(&$data, $base, $file, $type, $lvl, $opts)
192{
193
194    //we do nothing with directories
195    if ($type == 'd') {
196        if (empty($opts['depth'])) return true; // recurse forever
197        $depth = substr_count($file, '/');
198        if ($depth >= $opts['depth']) return false; // depth reached
199        return true;
200    }
201
202    $info         = [];
203    $info['id']   = pathID($file, true);
204    if ($info['id'] != cleanID($info['id'])) {
205        if (!empty($opts['showmsg']))
206            msg(hsc($info['id']) . ' is not a valid file name for DokuWiki - skipped', -1);
207        return false; // skip non-valid files
208    }
209
210    //check ACL for namespace (we have no ACL for mediafiles)
211    $info['perm'] = auth_quickaclcheck(getNS($info['id']) . ':*');
212    if (empty($opts['skipacl']) && $info['perm'] < AUTH_READ) {
213        return false;
214    }
215
216    //check pattern filter
217    if (!empty($opts['pattern']) && !@preg_match($opts['pattern'], $info['id'])) {
218        return false;
219    }
220
221    $info['file']     = PhpString::basename($file);
222    $info['size']     = filesize($base . '/' . $file);
223    $info['mtime']    = filemtime($base . '/' . $file);
224    $info['writable'] = is_writable($base . '/' . $file);
225    if (preg_match("/\.(jpe?g|gif|png)$/", $file)) {
226        $info['isimg'] = true;
227        $info['meta']  = new JpegMeta($base . '/' . $file);
228    } else {
229        $info['isimg'] = false;
230    }
231    if (!empty($opts['hash'])) {
232        $info['hash'] = md5(io_readFile(mediaFN($info['id']), false));
233    }
234
235    $data[] = $info;
236
237    return false;
238}
239
240/**
241 * List all mediafiles in a namespace
242 *   $opts['depth']     recursion level, 0 for all
243 *   $opts['showmsg']   shows message if invalid media id is used
244 *   $opts['skipacl']   skip acl checking
245 *   $opts['pattern']   check given pattern
246 *   $opts['hash']      add hashes to result list
247 *
248 * @todo This is a temporary copy of search_media returning a list of MediaFile intances
249 *
250 * @param array $data
251 * @param string $base
252 * @param string $file
253 * @param string $type
254 * @param integer $lvl
255 * @param array $opts
256 *
257 * @return bool
258 */
259function search_mediafiles(&$data, $base, $file, $type, $lvl, $opts)
260{
261
262    //we do nothing with directories
263    if ($type == 'd') {
264        if (empty($opts['depth'])) return true; // recurse forever
265        $depth = substr_count($file, '/');
266        if ($depth >= $opts['depth']) return false; // depth reached
267        return true;
268    }
269
270    $id   = pathID($file, true);
271    if ($id != cleanID($id)) {
272        if ($opts['showmsg'])
273            msg(hsc($id) . ' is not a valid file name for DokuWiki - skipped', -1);
274        return false; // skip non-valid files
275    }
276
277    //check ACL for namespace (we have no ACL for mediafiles)
278    $info['perm'] = auth_quickaclcheck(getNS($id) . ':*');
279    if (empty($opts['skipacl']) && $info['perm'] < AUTH_READ) {
280        return false;
281    }
282
283    //check pattern filter
284    if (!empty($opts['pattern']) && !@preg_match($opts['pattern'], $id)) {
285        return false;
286    }
287
288    $data[] = new MediaFile($id);
289    return false;
290}
291
292
293/**
294 * This function just lists documents (for RSS namespace export)
295 *
296 * @author  Andreas Gohr <andi@splitbrain.org>
297 *
298 * @param array $data
299 * @param string $base
300 * @param string $file
301 * @param string $type
302 * @param integer $lvl
303 * @param array $opts
304 *
305 * @return bool
306 */
307function search_list(&$data, $base, $file, $type, $lvl, $opts)
308{
309    //we do nothing with directories
310    if ($type == 'd') return false;
311    //only search txt files
312    if (substr($file, -4) == '.txt') {
313        //check ACL
314        $id = pathID($file);
315        if (auth_quickaclcheck($id) < AUTH_READ) {
316            return false;
317        }
318        $data[]['id'] = $id;
319    }
320    return false;
321}
322
323/**
324 * Quicksearch for searching matching pagenames
325 *
326 * $opts['query'] is the search query
327 *
328 * @author  Andreas Gohr <andi@splitbrain.org>
329 *
330 * @param array $data
331 * @param string $base
332 * @param string $file
333 * @param string $type
334 * @param integer $lvl
335 * @param array $opts
336 *
337 * @return bool
338 */
339function search_pagename(&$data, $base, $file, $type, $lvl, $opts)
340{
341    //we do nothing with directories
342    if ($type == 'd') return true;
343    //only search txt files
344    if (substr($file, -4) != '.txt') return true;
345
346    //simple stringmatching
347    if (!empty($opts['query'])) {
348        if (strpos($file, (string) $opts['query']) !== false) {
349            //check ACL
350            $id = pathID($file);
351            if (auth_quickaclcheck($id) < AUTH_READ) {
352                return false;
353            }
354            $data[]['id'] = $id;
355        }
356    }
357    return true;
358}
359
360/**
361 * Just lists all documents
362 *
363 * $opts['depth']   recursion level, 0 for all
364 * $opts['hash']    do md5 sum of content?
365 * $opts['skipacl'] list everything regardless of ACL
366 *
367 * @author  Andreas Gohr <andi@splitbrain.org>
368 *
369 * @param array $data
370 * @param string $base
371 * @param string $file
372 * @param string $type
373 * @param integer $lvl
374 * @param array $opts
375 *
376 * @return bool
377 */
378function search_allpages(&$data, $base, $file, $type, $lvl, $opts)
379{
380    if (isset($opts['depth']) && $opts['depth']) {
381        $parts = explode('/', ltrim($file, '/'));
382        if (
383            ($type == 'd' && count($parts) >= $opts['depth'])
384            || ($type != 'd' && count($parts) > $opts['depth'])
385        ) {
386            return false; // depth reached
387        }
388    }
389
390    //we do nothing with directories
391    if ($type == 'd') {
392        return true;
393    }
394
395    //only search txt files
396    if (substr($file, -4) != '.txt') return true;
397
398    $item = [];
399    $item['id']   = pathID($file);
400    if (empty($opts['skipacl']) && auth_quickaclcheck($item['id']) < AUTH_READ) {
401        return false;
402    }
403
404    $item['rev']   = filemtime($base . '/' . $file);
405    $item['mtime'] = $item['rev'];
406    $item['size']  = filesize($base . '/' . $file);
407    if (!empty($opts['hash'])) {
408        $item['hash'] = md5(trim(rawWiki($item['id'])));
409    }
410
411    $data[] = $item;
412    return true;
413}
414
415/* ------------- helper functions below -------------- */
416
417/**
418 * fulltext sort
419 *
420 * Callback sort function for use with usort to sort the data
421 * structure created by search_fulltext. Sorts descending by count
422 *
423 * @author  Andreas Gohr <andi@splitbrain.org>
424 *
425 * @param array $a
426 * @param array $b
427 *
428 * @return int
429 */
430function sort_search_fulltext($a, $b)
431{
432    if ($a['count'] > $b['count']) {
433        return -1;
434    } elseif ($a['count'] < $b['count']) {
435        return 1;
436    } else {
437        return Sort::strcmp($a['id'], $b['id']);
438    }
439}
440
441/**
442 * translates a document path to an ID
443 *
444 * @author  Andreas Gohr <andi@splitbrain.org>
445 * @todo    move to pageutils
446 *
447 * @param string $path
448 * @param bool $keeptxt
449 *
450 * @return mixed|string
451 */
452function pathID($path, $keeptxt = false)
453{
454    $id = utf8_decodeFN($path);
455    $id = str_replace('/', ':', $id);
456    if (!$keeptxt) $id = preg_replace('#\.txt$#', '', $id);
457    $id = trim($id, ':');
458    return $id;
459}
460
461
462/**
463 * This is a very universal callback for the search() function, replacing
464 * many of the former individual functions at the cost of a more complex
465 * setup.
466 *
467 * How the function behaves, depends on the options passed in the $opts
468 * array, where the following settings can be used.
469 *
470 * depth      int     recursion depth. 0 for unlimited                       (default: 0)
471 * keeptxt    bool    keep .txt extension for IDs                            (default: false)
472 * listfiles  bool    include files in listing                               (default: false)
473 * listdirs   bool    include namespaces in listing                          (default: false)
474 * pagesonly  bool    restrict files to pages                                (default: false)
475 * skipacl    bool    do not check for READ permission                       (default: false)
476 * sneakyacl  bool    don't recurse into nonreadable dirs                    (default: false)
477 * hash       bool    create MD5 hash for files                              (default: false)
478 * meta       bool    return file metadata                                   (default: false)
479 * filematch  string  match files against this regexp                        (default: '', so accept everything)
480 * idmatch    string  match full ID against this regexp                      (default: '', so accept everything)
481 * dirmatch   string  match directory against this regexp when adding        (default: '', so accept everything)
482 * nsmatch    string  match namespace against this regexp when adding        (default: '', so accept everything)
483 * recmatch   string  match directory against this regexp when recursing     (default: '', so accept everything)
484 * showmsg    bool    warn about non-ID files                                (default: false)
485 * showhidden bool    show hidden files(e.g. by hidepages config) too        (default: false)
486 * firsthead  bool    return first heading for pages                         (default: false)
487 *
488 * @param array &$data  - Reference to the result data structure
489 * @param string $base  - Base usually $conf['datadir']
490 * @param string $file  - current file or directory relative to $base
491 * @param string $type  - Type either 'd' for directory or 'f' for file
492 * @param int    $lvl   - Current recursion depht
493 * @param array  $opts  - option array as given to search()
494 * @return bool if this directory should be traversed (true) or not (false)
495 *              return value is ignored for files
496 *
497 * @author Andreas Gohr <gohr@cosmocode.de>
498 */
499function search_universal(&$data, $base, $file, $type, $lvl, $opts)
500{
501    $item   = [];
502    $return = true;
503
504    // get ID and check if it is a valid one
505    $item['id'] = pathID($file, ($type == 'd' || !empty($opts['keeptxt'])));
506    if ($item['id'] != cleanID($item['id'])) {
507        if (!empty($opts['showmsg'])) {
508            msg(hsc($item['id']) . ' is not a valid file name for DokuWiki - skipped', -1);
509        }
510        return false; // skip non-valid files
511    }
512    $item['ns']  = getNS($item['id']);
513
514    if ($type == 'd') {
515        // decide if to recursion into this directory is wanted
516        if (empty($opts['depth'])) {
517            $return = true; // recurse forever
518        } else {
519            $depth = substr_count($file, '/');
520            if ($depth >= $opts['depth']) {
521                $return = false; // depth reached
522            } else {
523                $return = true;
524            }
525        }
526
527        if ($return) {
528            $match = empty($opts['recmatch']) || preg_match('/' . $opts['recmatch'] . '/', $file);
529            if (!$match) {
530                return false; // doesn't match
531            }
532        }
533    }
534
535    // check ACL
536    if (empty($opts['skipacl'])) {
537        if ($type == 'd') {
538            $item['perm'] = auth_quickaclcheck($item['id'] . ':*');
539        } else {
540            $item['perm'] = auth_quickaclcheck($item['id']); //FIXME check namespace for media files
541        }
542    } else {
543        $item['perm'] = AUTH_DELETE;
544    }
545
546    // are we done here maybe?
547    if ($type == 'd') {
548        if (empty($opts['listdirs'])) return $return;
549        //neither list nor recurse forbidden items:
550        if (empty($opts['skipacl']) && !empty($opts['sneakyacl']) && $item['perm'] < AUTH_READ) return false;
551        if (!empty($opts['dirmatch']) && !preg_match('/' . $opts['dirmatch'] . '/', $file)) return $return;
552        if (!empty($opts['nsmatch']) && !preg_match('/' . $opts['nsmatch'] . '/', $item['ns'])) return $return;
553    } else {
554        if (empty($opts['listfiles'])) return $return;
555        if (empty($opts['skipacl']) && $item['perm'] < AUTH_READ) return $return;
556        if (!empty($opts['pagesonly']) && (substr($file, -4) != '.txt')) return $return;
557        if (empty($opts['showhidden']) && isHiddenPage($item['id'])) return $return;
558        if (!empty($opts['filematch']) && !preg_match('/' . $opts['filematch'] . '/', $file)) return $return;
559        if (!empty($opts['idmatch']) && !preg_match('/' . $opts['idmatch'] . '/', $item['id'])) return $return;
560    }
561
562    // still here? prepare the item
563    $item['type']  = $type;
564    $item['level'] = $lvl;
565    $item['open']  = $return;
566
567    if (!empty($opts['meta'])) {
568        $item['file']       = PhpString::basename($file);
569        $item['size']       = filesize($base . '/' . $file);
570        $item['mtime']      = filemtime($base . '/' . $file);
571        $item['rev']        = $item['mtime'];
572        $item['writable']   = is_writable($base . '/' . $file);
573        $item['executable'] = is_executable($base . '/' . $file);
574    }
575
576    if ($type == 'f') {
577        if (!empty($opts['hash'])) $item['hash'] = md5(io_readFile($base . '/' . $file, false));
578        if (!empty($opts['firsthead'])) $item['title'] = p_get_first_heading($item['id'], METADATA_DONT_RENDER);
579    }
580
581    // finally add the item
582    $data[] = $item;
583    return $return;
584}
585
586//Setup VIM: ex: et ts=4 :
587