xref: /dokuwiki/inc/media.php (revision 5e9d26e3624fd22ca3c57447be9e16d0b502761e) 
1<?php
2
3/**
4 * All output and handler function needed for the media management popup
5 *
6 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
7 * @author     Andreas Gohr <andi@splitbrain.org>
8 */
9
10use dokuwiki\Ui\MediaRevisions;
11use dokuwiki\Cache\CacheImageMod;
12use splitbrain\slika\Exception;
13use dokuwiki\PassHash;
14use dokuwiki\ChangeLog\MediaChangeLog;
15use dokuwiki\Extension\Event;
16use dokuwiki\Form\Form;
17use dokuwiki\HTTP\DokuHTTPClient;
18use dokuwiki\Logger;
19use dokuwiki\Subscriptions\MediaSubscriptionSender;
20use dokuwiki\Ui\Media\DisplayRow;
21use dokuwiki\Ui\Media\DisplayTile;
22use dokuwiki\Search\MetadataSearch;
23use dokuwiki\Ui\MediaDiff;
24use dokuwiki\Utf8\PhpString;
25use dokuwiki\Utf8\Sort;
26use splitbrain\slika\Slika;
27
28/**
29 * Lists pages which currently use a media file selected for deletion
30 *
31 * References uses the same visual as search results and share
32 * their CSS tags except pagenames won't be links.
33 *
34 * @author Matthias Grimm <matthiasgrimm@users.sourceforge.net>
35 *
36 * @param array $data
37 * @param string $id
38 */
39function media_filesinuse($data, $id)
40{
41    global $lang;
42    echo '<h1>' . $lang['reference'] . ' <code>' . hsc(noNS($id)) . '</code></h1>';
43    echo '<p>' . hsc($lang['ref_inuse']) . '</p>';
44
45    $hidden = 0; //count of hits without read permission
46    foreach ($data as $row) {
47        if (auth_quickaclcheck($row) >= AUTH_READ && isVisiblePage($row)) {
48            echo '<div class="search_result">';
49            echo '<span class="mediaref_ref">' . hsc($row) . '</span>';
50            echo '</div>';
51        } else $hidden++;
52    }
53    if ($hidden) {
54        echo '<div class="mediaref_hidden">' . $lang['ref_hidden'] . '</div>';
55    }
56}
57
58/**
59 * Handles the saving of image meta data
60 *
61 * @author Andreas Gohr <andi@splitbrain.org>
62 * @author Kate Arzamastseva <pshns@ukr.net>
63 *
64 * @param string $id media id
65 * @param int $auth permission level
66 * @param array $data
67 * @return false|string
68 */
69function media_metasave($id, $auth, $data)
70{
71    if ($auth < AUTH_UPLOAD) return false;
72    if (!checkSecurityToken()) return false;
73    global $lang;
74    global $conf;
75    $src = mediaFN($id);
76
77    $meta = new JpegMeta($src);
78    $meta->_parseAll();
79
80    foreach ($data as $key => $val) {
81        $val = trim($val);
82        if (empty($val)) {
83            $meta->deleteField($key);
84        } else {
85            $meta->setField($key, $val);
86        }
87    }
88
89    $old = @filemtime($src);
90    if (!file_exists(mediaFN($id, $old)) && file_exists($src)) {
91        // add old revision to the attic
92        media_saveOldRevision($id);
93    }
94    $filesize_old = filesize($src);
95    if ($meta->save()) {
96        if ($conf['fperm']) chmod($src, $conf['fperm']);
97        @clearstatcache(true, $src);
98        $new = @filemtime($src);
99        $filesize_new = filesize($src);
100        $sizechange = $filesize_new - $filesize_old;
101
102        // add a log entry to the media changelog
103        addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT, $lang['media_meta_edited'], '', null, $sizechange);
104
105        msg($lang['metasaveok'], 1);
106        return $id;
107    } else {
108        msg($lang['metasaveerr'], -1);
109        return false;
110    }
111}
112
113/**
114 * check if a media is external source
115 *
116 * @author Gerrit Uitslag <klapinklapin@gmail.com>
117 *
118 * @param string $id the media ID or URL
119 * @return bool
120 */
121function media_isexternal($id)
122{
123    if (preg_match('#^(?:https?|ftp)://#i', $id)) return true;
124    return false;
125}
126
127/**
128 * Check if a media item is public (eg, external URL or readable by @ALL)
129 *
130 * @author Andreas Gohr <andi@splitbrain.org>
131 *
132 * @param string $id  the media ID or URL
133 * @return bool
134 */
135function media_ispublic($id)
136{
137    if (media_isexternal($id)) return true;
138    $id = cleanID($id);
139    if (auth_aclcheck(getNS($id) . ':*', '', []) >= AUTH_READ) return true;
140    return false;
141}
142
143/**
144 * Display the form to edit image meta data
145 *
146 * @author Andreas Gohr <andi@splitbrain.org>
147 * @author Kate Arzamastseva <pshns@ukr.net>
148 *
149 * @param string $id media id
150 * @param int $auth permission level
151 * @return bool
152 */
153function media_metaform($id, $auth)
154{
155    global $lang;
156
157    if ($auth < AUTH_UPLOAD) {
158        echo '<div class="nothing">' . $lang['media_perm_upload'] . '</div>' . DOKU_LF;
159        return false;
160    }
161
162    // load the field descriptions
163    static $fields = null;
164    if ($fields === null) {
165        $config_files = getConfigFiles('mediameta');
166        foreach ($config_files as $config_file) {
167            if (file_exists($config_file)) include($config_file);
168        }
169    }
170
171    $src = mediaFN($id);
172
173    // output
174    $form = new Form([
175            'action' => media_managerURL(['tab_details' => 'view'], '&'),
176            'class' => 'meta'
177    ]);
178    $form->addTagOpen('div')->addClass('no');
179    $form->setHiddenField('img', $id);
180    $form->setHiddenField('mediado', 'save');
181    foreach ($fields as $key => $field) {
182        // get current value
183        if (empty($field[0])) continue;
184        $tags = [$field[0]];
185        if (isset($field[3]) && is_array($field[3])) $tags = array_merge($tags, $field[3]);
186        $value = tpl_img_getTag($tags, '', $src);
187        $value = cleanText($value);
188
189        // prepare attributes
190        $p = [
191            'class' => 'edit',
192            'id'    => 'meta__' . $key,
193            'name'  => 'meta[' . $field[0] . ']'
194        ];
195
196        $form->addTagOpen('div')->addClass('row');
197        if ($field[2] == 'text') {
198            $form->addTextInput(
199                $p['name'],
200                ($lang[$field[1]] ?: $field[1] . ':')
201            )->id($p['id'])->addClass($p['class'])->val($value);
202        } else {
203            $form->addTextarea($p['name'], $lang[$field[1]])->id($p['id'])
204                ->val(formText($value))
205                ->addClass($p['class'])
206                ->attr('rows', '6')->attr('cols', '50');
207        }
208        $form->addTagClose('div');
209    }
210    $form->addTagOpen('div')->addClass('buttons');
211    $form->addButton('mediado[save]', $lang['btn_save'])->attr('type', 'submit')
212        ->attrs(['accesskey' => 's']);
213    $form->addTagClose('div');
214
215    $form->addTagClose('div');
216    echo $form->toHTML();
217    return true;
218}
219
220/**
221 * Convenience function to check if a media file is still in use
222 *
223 * @author Michael Klier <chi@chimeric.de>
224 *
225 * @param string $id media id
226 * @return array|bool
227 */
228function media_inuse($id)
229{
230    global $conf;
231
232    if ($conf['refcheck']) {
233        $mediareferences = (new MetadataSearch())->mediause($id, true);
234        if ($mediareferences === []) {
235            return false;
236        } else {
237            return $mediareferences;
238        }
239    } else {
240        return false;
241    }
242}
243
244/**
245 * Handles media file deletions
246 *
247 * If configured, checks for media references before deletion
248 *
249 * @author             Andreas Gohr <andi@splitbrain.org>
250 *
251 * @param string $id media id
252 * @param int $auth no longer used
253 * @return int One of: 0,
254 *                     DOKU_MEDIA_DELETED,
255 *                     DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS,
256 *                     DOKU_MEDIA_NOT_AUTH,
257 *                     DOKU_MEDIA_INUSE
258 */
259function media_delete($id, $auth)
260{
261    global $lang;
262    $auth = auth_quickaclcheck(ltrim(getNS($id) . ':*', ':'));
263    if ($auth < AUTH_DELETE) return DOKU_MEDIA_NOT_AUTH;
264    if (media_inuse($id)) return DOKU_MEDIA_INUSE;
265
266    $file = mediaFN($id);
267
268    // trigger an event - MEDIA_DELETE_FILE
269    $data = [];
270    $data['id']   = $id;
271    $data['name'] = PhpString::basename($file);
272    $data['path'] = $file;
273    $data['size'] = (file_exists($file)) ? filesize($file) : 0;
274
275    $data['unl'] = false;
276    $data['del'] = false;
277    $evt = new Event('MEDIA_DELETE_FILE', $data);
278    if ($evt->advise_before()) {
279        $old = @filemtime($file);
280        if (!file_exists(mediaFN($id, $old)) && file_exists($file)) {
281            // add old revision to the attic
282            media_saveOldRevision($id);
283        }
284
285        $data['unl'] = @unlink($file);
286        if ($data['unl']) {
287            $sizechange = 0 - $data['size'];
288            addMediaLogEntry(time(), $id, DOKU_CHANGE_TYPE_DELETE, $lang['deleted'], '', null, $sizechange);
289
290            $data['del'] = io_sweepNS($id, 'mediadir');
291        }
292    }
293    $evt->advise_after();
294    unset($evt);
295
296    if ($data['unl'] && $data['del']) {
297        return DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS;
298    }
299
300    return $data['unl'] ? DOKU_MEDIA_DELETED : 0;
301}
302
303/**
304 * Handle file uploads via XMLHttpRequest
305 *
306 * @param string $ns   target namespace
307 * @param int    $auth current auth check result
308 * @return false|string false on error, id of the new file on success
309 */
310function media_upload_xhr($ns, $auth)
311{
312    if (!checkSecurityToken()) return false;
313    global $INPUT;
314
315    $id = $INPUT->get->str('qqfile');
316    [$ext, $mime] = mimetype($id);
317    $input = fopen("php://input", "r");
318    if (!($tmp = io_mktmpdir())) return false;
319    $path = $tmp . '/' . md5($id);
320    $target = fopen($path, "w");
321    $realSize = stream_copy_to_stream($input, $target);
322    fclose($target);
323    fclose($input);
324    if ($INPUT->server->has('CONTENT_LENGTH') && ($realSize != $INPUT->server->int('CONTENT_LENGTH'))) {
325        unlink($path);
326        return false;
327    }
328
329    $res = media_save(
330        ['name' => $path, 'mime' => $mime, 'ext'  => $ext],
331        $ns . ':' . $id,
332        ($INPUT->get->str('ow') == 'true'),
333        $auth,
334        'copy'
335    );
336    unlink($path);
337    if ($tmp) io_rmdir($tmp, true);
338    if (is_array($res)) {
339        msg($res[0], $res[1]);
340        return false;
341    }
342    return $res;
343}
344
345/**
346 * Handles media file uploads
347 *
348 * @author Andreas Gohr <andi@splitbrain.org>
349 * @author Michael Klier <chi@chimeric.de>
350 *
351 * @param string     $ns    target namespace
352 * @param int        $auth  current auth check result
353 * @param bool|array $file  $_FILES member, $_FILES['upload'] if false
354 * @return false|string false on error, id of the new file on success
355 */
356function media_upload($ns, $auth, $file = false)
357{
358    if (!checkSecurityToken()) return false;
359    global $lang;
360    global $INPUT;
361
362    // get file and id
363    $id   = $INPUT->post->str('mediaid');
364    if (!$file) $file = $_FILES['upload'];
365    if (empty($id)) $id = $file['name'];
366
367    // check for errors (messages are done in lib/exe/mediamanager.php)
368    if ($file['error']) return false;
369
370    // check extensions
371    [$fext, $fmime] = mimetype($file['name']);
372    [$iext, $imime] = mimetype($id);
373    if ($fext && !$iext) {
374        // no extension specified in id - read original one
375        $id   .= '.' . $fext;
376        $imime = $fmime;
377    } elseif ($fext && $fext != $iext) {
378        // extension was changed, print warning
379        msg(sprintf($lang['mediaextchange'], $fext, $iext));
380    }
381
382    $res = media_save(
383        [
384            'name' => $file['tmp_name'],
385            'mime' => $imime,
386            'ext' => $iext
387        ],
388        $ns . ':' . $id,
389        $INPUT->post->bool('ow'),
390        $auth,
391        'copy_uploaded_file'
392    );
393    if (is_array($res)) {
394        msg($res[0], $res[1]);
395        return false;
396    }
397    return $res;
398}
399
400/**
401 * An alternative to move_uploaded_file that copies
402 *
403 * Using copy, makes sure any setgid bits on the media directory are honored
404 *
405 * @see   move_uploaded_file()
406 *
407 * @param string $from
408 * @param string $to
409 * @return bool
410 */
411function copy_uploaded_file($from, $to)
412{
413    if (!is_uploaded_file($from)) return false;
414    $ok = copy($from, $to);
415    @unlink($from);
416    return $ok;
417}
418
419/**
420 * This generates an action event and delegates to _media_upload_action().
421 * Action plugins are allowed to pre/postprocess the uploaded file.
422 * (The triggered event is preventable.)
423 *
424 * Event data:
425 * $data[0]     fn_tmp:    the temporary file name (read from $_FILES)
426 * $data[1]     fn:        the file name of the uploaded file
427 * $data[2]     id:        the future directory id of the uploaded file
428 * $data[3]     imime:     the mimetype of the uploaded file
429 * $data[4]     overwrite: if an existing file is going to be overwritten
430 * $data[5]     move:      name of function that performs move/copy/..
431 *
432 * @triggers MEDIA_UPLOAD_FINISH
433 *
434 * @param array  $file
435 * @param string $id   media id
436 * @param bool   $ow   overwrite?
437 * @param int    $auth permission level
438 * @param string $move name of functions that performs move/copy/..
439 * @return false|array|string
440 */
441function media_save($file, $id, $ow, $auth, $move)
442{
443    if ($auth < AUTH_UPLOAD) {
444        return ["You don't have permissions to upload files.", -1];
445    }
446
447    if (!isset($file['mime']) || !isset($file['ext'])) {
448        [$ext, $mime] = mimetype($id);
449        if (!isset($file['mime'])) {
450            $file['mime'] = $mime;
451        }
452        if (!isset($file['ext'])) {
453            $file['ext'] = $ext;
454        }
455    }
456
457    global $lang, $conf;
458
459    // get filename
460    $id   = cleanID($id);
461    $fn   = mediaFN($id);
462
463    // get filetype regexp
464    $types = array_keys(getMimeTypes());
465    $types = array_map(
466        static fn($q) => preg_quote($q, "/"),
467        $types
468    );
469    $regex = implode('|', $types);
470
471    // because a temp file was created already
472    if (!preg_match('/\.(' . $regex . ')$/i', $fn)) {
473        return [$lang['uploadwrong'], -1];
474    }
475
476    //check for overwrite
477    $overwrite = file_exists($fn);
478    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
479    if ($overwrite && (!$ow || $auth < $auth_ow)) {
480        return [$lang['uploadexist'], 0];
481    }
482    // check for valid content
483    $ok = media_contentcheck($file['name'], $file['mime']);
484    if ($ok == -1) {
485        return [sprintf($lang['uploadbadcontent'], '.' . $file['ext']), -1];
486    } elseif ($ok == -2) {
487        return [$lang['uploadspam'], -1];
488    } elseif ($ok == -3) {
489        return [$lang['uploadxss'], -1];
490    }
491
492    // prepare event data
493    $data = [];
494    $data[0] = $file['name'];
495    $data[1] = $fn;
496    $data[2] = $id;
497    $data[3] = $file['mime'];
498    $data[4] = $overwrite;
499    $data[5] = $move;
500
501    // trigger event
502    return Event::createAndTrigger('MEDIA_UPLOAD_FINISH', $data, '_media_upload_action', true);
503}
504
505/**
506 * Callback adapter for media_upload_finish() triggered by MEDIA_UPLOAD_FINISH
507 *
508 * @author Michael Klier <chi@chimeric.de>
509 *
510 * @param array $data event data
511 * @return false|array|string
512 */
513function _media_upload_action($data)
514{
515    // fixme do further sanity tests of given data?
516    if (is_array($data) && count($data) === 6) {
517        return media_upload_finish($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
518    } else {
519        return false; //callback error
520    }
521}
522
523/**
524 * Saves an uploaded media file
525 *
526 * @author Andreas Gohr <andi@splitbrain.org>
527 * @author Michael Klier <chi@chimeric.de>
528 * @author Kate Arzamastseva <pshns@ukr.net>
529 *
530 * @param string $fn_tmp
531 * @param string $fn
532 * @param string $id        media id
533 * @param string $imime     mime type
534 * @param bool   $overwrite overwrite existing?
535 * @param string $move      function name
536 * @return array|string
537 */
538function media_upload_finish($fn_tmp, $fn, $id, $imime, $overwrite, $move = 'move_uploaded_file')
539{
540    global $conf;
541    global $lang;
542    global $REV;
543
544    $old = @filemtime($fn);
545    if (!file_exists(mediaFN($id, $old)) && file_exists($fn)) {
546        // add old revision to the attic if missing
547        media_saveOldRevision($id);
548    }
549
550    // prepare directory
551    io_createNamespace($id, 'media');
552
553    $filesize_old = file_exists($fn) ? filesize($fn) : 0;
554
555    if ($move($fn_tmp, $fn)) {
556        @clearstatcache(true, $fn);
557        $new = @filemtime($fn);
558        // Set the correct permission here.
559        // Always chmod media because they may be saved with different permissions than expected from the php umask.
560        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
561        chmod($fn, $conf['fmode']);
562        msg($lang['uploadsucc'], 1);
563        media_notify($id, $fn, $imime, $old, $new);
564        // add a log entry to the media changelog
565        $filesize_new = filesize($fn);
566        $sizechange = $filesize_new - $filesize_old;
567        if ($REV) {
568            addMediaLogEntry(
569                $new,
570                $id,
571                DOKU_CHANGE_TYPE_REVERT,
572                sprintf($lang['restored'], dformat($REV)),
573                $REV,
574                null,
575                $sizechange
576            );
577        } elseif ($overwrite) {
578            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT, '', '', null, $sizechange);
579        } else {
580            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created'], '', null, $sizechange);
581        }
582        return $id;
583    } else {
584        return [$lang['uploadfail'], -1];
585    }
586}
587
588/**
589 * Moves the current version of media file to the media_attic
590 * directory
591 *
592 * @author Kate Arzamastseva <pshns@ukr.net>
593 *
594 * @param string $id
595 * @return int - revision date
596 */
597function media_saveOldRevision($id)
598{
599    global $conf, $lang;
600
601    $oldf = mediaFN($id);
602    if (!file_exists($oldf)) return '';
603    $date = filemtime($oldf);
604    if (!$conf['mediarevisions']) return $date;
605
606    $medialog = new MediaChangeLog($id);
607    if (!$medialog->getRevisionInfo($date)) {
608        // there was an external edit,
609        // there is no log entry for current version of file
610        $sizechange = filesize($oldf);
611        if (!file_exists(mediaMetaFN($id, '.changes'))) {
612            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created'], '', null, $sizechange);
613        } else {
614            $oldRev = $medialog->getRevisions(-1, 1); // from changelog
615            $oldRev = (int) (empty($oldRev) ? 0 : $oldRev[0]);
616            $filesize_old = filesize(mediaFN($id, $oldRev));
617            $sizechange -= $filesize_old;
618
619            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_EDIT, '', '', null, $sizechange);
620        }
621    }
622
623    $newf = mediaFN($id, $date);
624    io_makeFileDir($newf);
625    if (copy($oldf, $newf)) {
626        // Set the correct permission here.
627        // Always chmod media because they may be saved with different permissions than expected from the php umask.
628        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
629        chmod($newf, $conf['fmode']);
630    }
631    return $date;
632}
633
634/**
635 * This function checks if the uploaded content is really what the
636 * mimetype says it is. We also do spam checking for text types here.
637 *
638 * We need to do this stuff because we can not rely on the browser
639 * to do this check correctly. Yes, IE is broken as usual.
640 *
641 * @author Andreas Gohr <andi@splitbrain.org>
642 * @link   http://www.splitbrain.org/blog/2007-02/12-internet_explorer_facilitates_cross_site_scripting
643 * @fixme  check all 26 magic IE filetypes here?
644 *
645 * @param string $file path to file
646 * @param string $mime mimetype
647 * @return int
648 */
649function media_contentcheck($file, $mime)
650{
651    global $conf;
652    if ($conf['iexssprotect']) {
653        $fh = @fopen($file, 'rb');
654        if ($fh) {
655            $bytes = fread($fh, 256);
656            fclose($fh);
657            if (preg_match('/<(script|a|img|html|body|iframe)[\s>]/i', $bytes)) {
658                return -3; //XSS: possibly malicious content
659            }
660        }
661    }
662    if (str_starts_with($mime, 'image/')) {
663        $info = @getimagesize($file);
664        if ($mime == 'image/gif' && $info[2] != 1) {
665            return -1; // uploaded content did not match the file extension
666        } elseif ($mime == 'image/jpeg' && $info[2] != 2) {
667            return -1;
668        } elseif ($mime == 'image/png' && $info[2] != 3) {
669            return -1;
670        }
671        # fixme maybe check other images types as well
672    } elseif (str_starts_with($mime, 'text/')) {
673        global $TEXT;
674        $TEXT = io_readFile($file);
675        if (checkwordblock()) {
676            return -2; //blocked by the spam blacklist
677        }
678    }
679    return 0;
680}
681
682/**
683 * Send a notify mail on uploads
684 *
685 * @author Andreas Gohr <andi@splitbrain.org>
686 *
687 * @param string   $id      media id
688 * @param string   $file    path to file
689 * @param string   $mime    mime type
690 * @param bool|int $old_rev revision timestamp or false
691 */
692function media_notify($id, $file, $mime, $old_rev = false, $current_rev = false)
693{
694    global $conf;
695    if (empty($conf['notify'])) return; //notify enabled?
696
697    $subscription = new MediaSubscriptionSender();
698    $subscription->sendMediaDiff($conf['notify'], 'uploadmail', $id, $old_rev, $current_rev);
699}
700
701/**
702 * List all files in a given Media namespace
703 *
704 * @param string      $ns             namespace
705 * @param null|int    $auth           permission level
706 * @param string      $jump           id
707 * @param bool        $fullscreenview
708 * @param bool|string $sort           sorting order, false skips sorting
709 */
710function media_filelist($ns, $auth = null, $jump = '', $fullscreenview = false, $sort = false)
711{
712    global $conf;
713    global $lang;
714    $ns = cleanID($ns);
715
716    // check auth our self if not given (needed for ajax calls)
717    if (is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
718
719    if (!$fullscreenview) echo '<h1 id="media__ns">:' . hsc($ns) . '</h1>' . NL;
720
721    if ($auth < AUTH_READ) {
722        // FIXME: print permission warning here instead?
723        echo '<div class="nothing">' . $lang['nothingfound'] . '</div>' . NL;
724    } else {
725        if (!$fullscreenview) {
726            media_uploadform($ns, $auth);
727            media_searchform($ns);
728        }
729
730        $dir = utf8_encodeFN(str_replace(':', '/', $ns));
731        $data = [];
732        search(
733            $data,
734            $conf['mediadir'],
735            'search_mediafiles',
736            ['showmsg' => true, 'depth' => 1],
737            $dir,
738            1,
739            $sort
740        );
741
742        if ($data === []) {
743            echo '<div class="nothing">' . $lang['nothingfound'] . '</div>' . NL;
744        } else {
745            if ($fullscreenview) {
746                echo '<ul class="' . _media_get_list_type() . '">';
747            }
748            foreach ($data as $item) {
749                if (!$fullscreenview) {
750                    //FIXME old call: media_printfile($item,$auth,$jump);
751                    $display = new DisplayRow($item);
752                    $display->scrollIntoView($jump == $item->getID());
753                    $display->show();
754                } else {
755                    //FIXME old call: media_printfile_thumbs($item,$auth,$jump);
756                    echo '<li>';
757                    $display = new DisplayTile($item);
758                    $display->scrollIntoView($jump == $item->getID());
759                    $display->show();
760                    echo '</li>';
761                }
762            }
763            if ($fullscreenview) echo '</ul>' . NL;
764        }
765    }
766}
767
768/**
769 * Prints tabs for files list actions
770 *
771 * @author Kate Arzamastseva <pshns@ukr.net>
772 * @author Adrian Lang <mail@adrianlang.de>
773 *
774 * @param string $selected_tab - opened tab
775 */
776
777function media_tabs_files($selected_tab = '')
778{
779    global $lang;
780    $tabs = [];
781    foreach (
782        [
783            'files' => 'mediaselect',
784            'upload' => 'media_uploadtab',
785            'search' => 'media_searchtab'
786        ] as $tab => $caption
787    ) {
788        $tabs[$tab] = [
789            'href'    => media_managerURL(['tab_files' => $tab], '&'),
790            'caption' => $lang[$caption]
791        ];
792    }
793
794    html_tabs($tabs, $selected_tab);
795}
796
797/**
798 * Prints tabs for files details actions
799 *
800 * @author Kate Arzamastseva <pshns@ukr.net>
801 * @param string $image filename of the current image
802 * @param string $selected_tab opened tab
803 */
804function media_tabs_details($image, $selected_tab = '')
805{
806    global $lang, $conf;
807
808    $tabs = [];
809    $tabs['view'] = [
810        'href'    => media_managerURL(['tab_details' => 'view'], '&'),
811        'caption' => $lang['media_viewtab']
812    ];
813
814    [, $mime] = mimetype($image);
815    if ($mime == 'image/jpeg' && file_exists(mediaFN($image))) {
816        $tabs['edit'] = [
817            'href'    => media_managerURL(['tab_details' => 'edit'], '&'),
818            'caption' => $lang['media_edittab']
819        ];
820    }
821    if ($conf['mediarevisions']) {
822        $tabs['history'] = [
823            'href'    => media_managerURL(['tab_details' => 'history'], '&'),
824            'caption' => $lang['media_historytab']
825        ];
826    }
827
828    html_tabs($tabs, $selected_tab);
829}
830
831/**
832 * Prints options for the tab that displays a list of all files
833 *
834 * @author Kate Arzamastseva <pshns@ukr.net>
835 */
836function media_tab_files_options()
837{
838    global $lang;
839    global $INPUT;
840    global $ID;
841
842    $form = new Form([
843            'method' => 'get',
844            'action' => wl($ID),
845            'class' => 'options'
846    ]);
847    $form->addTagOpen('div')->addClass('no');
848    $form->setHiddenField('sectok', null);
849    $media_manager_params = media_managerURL([], '', false, true);
850    foreach ($media_manager_params as $pKey => $pVal) {
851        $form->setHiddenField($pKey, $pVal);
852    }
853    if ($INPUT->has('q')) {
854        $form->setHiddenField('q', $INPUT->str('q'));
855    }
856    $form->addHTML('<ul>' . NL);
857    foreach (
858        [
859            'list' => ['listType', ['thumbs', 'rows']],
860            'sort' => ['sortBy', ['name', 'date']]
861        ] as $group => $content
862    ) {
863        $checked = "_media_get_{$group}_type";
864        $checked = $checked();
865
866        $form->addHTML('<li class="' . $content[0] . '">');
867        foreach ($content[1] as $option) {
868            $attrs = [];
869            if ($checked == $option) {
870                $attrs['checked'] = 'checked';
871            }
872            $radio = $form->addRadioButton(
873                $group . '_dwmedia',
874                $lang['media_' . $group . '_' . $option]
875            )->val($option)->id($content[0] . '__' . $option)->addClass($option);
876            $radio->attrs($attrs);
877        }
878        $form->addHTML('</li>' . NL);
879    }
880    $form->addHTML('<li>');
881    $form->addButton('', $lang['btn_apply'])->attr('type', 'submit');
882    $form->addHTML('</li>' . NL);
883    $form->addHTML('</ul>' . NL);
884    $form->addTagClose('div');
885    echo $form->toHTML();
886}
887
888/**
889 * Returns type of sorting for the list of files in media manager
890 *
891 * @author Kate Arzamastseva <pshns@ukr.net>
892 *
893 * @return string - sort type
894 */
895function _media_get_sort_type()
896{
897    return _media_get_display_param('sort', ['default' => 'name', 'date']);
898}
899
900/**
901 * Returns type of listing for the list of files in media manager
902 *
903 * @author Kate Arzamastseva <pshns@ukr.net>
904 *
905 * @return string - list type
906 */
907function _media_get_list_type()
908{
909    return _media_get_display_param('list', ['default' => 'thumbs', 'rows']);
910}
911
912/**
913 * Get display parameters
914 *
915 * @param string $param   name of parameter
916 * @param array  $values  allowed values, where default value has index key 'default'
917 * @return string the parameter value
918 */
919function _media_get_display_param($param, $values)
920{
921    global $INPUT;
922    if (in_array($INPUT->str($param), $values)) {
923        // FIXME: Set cookie
924        return $INPUT->str($param);
925    } else {
926        $val = get_doku_pref($param, $values['default']);
927        if (!in_array($val, $values)) {
928            $val = $values['default'];
929        }
930        return $val;
931    }
932}
933
934/**
935 * Prints tab that displays a list of all files
936 *
937 * @author Kate Arzamastseva <pshns@ukr.net>
938 *
939 * @param string    $ns
940 * @param null|int  $auth permission level
941 * @param string    $jump item id
942 */
943function media_tab_files($ns, $auth = null, $jump = '')
944{
945    global $lang;
946    if (is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
947
948    if ($auth < AUTH_READ) {
949        echo '<div class="nothing">' . $lang['media_perm_read'] . '</div>' . NL;
950    } else {
951        media_filelist($ns, $auth, $jump, true, _media_get_sort_type());
952    }
953}
954
955/**
956 * Prints tab that displays uploading form
957 *
958 * @author Kate Arzamastseva <pshns@ukr.net>
959 *
960 * @param string   $ns
961 * @param null|int $auth permission level
962 * @param string   $jump item id
963 */
964function media_tab_upload($ns, $auth = null, $jump = '')
965{
966    global $lang;
967    if (is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
968
969    echo '<div class="upload">' . NL;
970    if ($auth >= AUTH_UPLOAD) {
971        echo '<p>' . $lang['mediaupload'] . '</p>';
972    }
973    media_uploadform($ns, $auth, true);
974    echo '</div>' . NL;
975}
976
977/**
978 * Prints tab that displays search form
979 *
980 * @author Kate Arzamastseva <pshns@ukr.net>
981 *
982 * @param string $ns
983 * @param null|int $auth permission level
984 */
985function media_tab_search($ns, $auth = null)
986{
987    global $INPUT;
988
989    $do = $INPUT->str('mediado');
990    $query = $INPUT->str('q');
991    echo '<div class="search">' . NL;
992
993    media_searchform($ns, $query, true);
994    if ($do == 'searchlist' || $query) {
995        media_searchlist($query, $ns, $auth, true, _media_get_sort_type());
996    }
997    echo '</div>' . NL;
998}
999
1000/**
1001 * Prints tab that displays mediafile details
1002 *
1003 * @author Kate Arzamastseva <pshns@ukr.net>
1004 *
1005 * @param string     $image media id
1006 * @param string     $ns
1007 * @param null|int   $auth  permission level
1008 * @param string|int $rev   revision timestamp or empty string
1009 */
1010function media_tab_view($image, $ns, $auth = null, $rev = '')
1011{
1012    global $lang;
1013    if (is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
1014
1015    if ($image && $auth >= AUTH_READ) {
1016        $meta = new JpegMeta(mediaFN($image, $rev));
1017        media_preview($image, $auth, $rev, $meta);
1018        media_preview_buttons($image, $auth, $rev);
1019        media_details($image, $auth, $rev, $meta);
1020    } else {
1021        echo '<div class="nothing">' . $lang['media_perm_read'] . '</div>' . NL;
1022    }
1023}
1024
1025/**
1026 * Prints tab that displays form for editing mediafile metadata
1027 *
1028 * @author Kate Arzamastseva <pshns@ukr.net>
1029 *
1030 * @param string     $image media id
1031 * @param string     $ns
1032 * @param null|int   $auth permission level
1033 */
1034function media_tab_edit($image, $ns, $auth = null)
1035{
1036    if (is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
1037
1038    if ($image) {
1039        [, $mime] = mimetype($image);
1040        if ($mime == 'image/jpeg') media_metaform($image, $auth);
1041    }
1042}
1043
1044/**
1045 * Prints tab that displays mediafile revisions
1046 *
1047 * @author Kate Arzamastseva <pshns@ukr.net>
1048 *
1049 * @param string     $image media id
1050 * @param string     $ns
1051 * @param null|int   $auth permission level
1052 */
1053function media_tab_history($image, $ns, $auth = null)
1054{
1055    global $lang;
1056    global $INPUT;
1057
1058    if (is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
1059    $do = $INPUT->str('mediado');
1060
1061    if ($auth >= AUTH_READ && $image) {
1062        if ($do == 'diff') {
1063            (new MediaDiff($image))->show(); //media_diff($image, $ns, $auth);
1064        } else {
1065            $first = $INPUT->int('first', -1);
1066            (new MediaRevisions($image))->show($first);
1067        }
1068    } else {
1069        echo '<div class="nothing">' . $lang['media_perm_read'] . '</div>' . NL;
1070    }
1071}
1072
1073/**
1074 * Prints mediafile details
1075 *
1076 * @param string         $image media id
1077 * @param int            $auth permission level
1078 * @param int|string     $rev revision timestamp or empty string
1079 * @param JpegMeta|bool  $meta
1080 *
1081 * @author Kate Arzamastseva <pshns@ukr.net>
1082 */
1083function media_preview($image, $auth, $rev = '', $meta = false)
1084{
1085
1086    $size = media_image_preview_size($image, $rev, $meta);
1087
1088    if ($size) {
1089        global $lang;
1090        echo '<div class="image">';
1091
1092        $more = [];
1093        if ($rev) {
1094            $more['rev'] = $rev;
1095        } else {
1096            $t = @filemtime(mediaFN($image));
1097            $more['t'] = $t;
1098        }
1099
1100        $more['w'] = $size[0];
1101        $more['h'] = $size[1];
1102        $src = ml($image, $more);
1103
1104        echo '<a href="' . $src . '" target="_blank" title="' . $lang['mediaview'] . '">';
1105        echo '<img src="' . $src . '" alt="" style="max-width: ' . $size[0] . 'px;" />';
1106        echo '</a>';
1107
1108        echo '</div>';
1109    }
1110}
1111
1112/**
1113 * Prints mediafile action buttons
1114 *
1115 * @author Kate Arzamastseva <pshns@ukr.net>
1116 *
1117 * @param string     $image media id
1118 * @param int        $auth  permission level
1119 * @param int|string $rev   revision timestamp, or empty string
1120 */
1121function media_preview_buttons($image, $auth, $rev = '')
1122{
1123    global $lang, $conf;
1124
1125    echo '<ul class="actions">';
1126
1127    if ($auth >= AUTH_DELETE && !$rev && file_exists(mediaFN($image))) {
1128        // delete button
1129        $form = new Form([
1130            'id' => 'mediamanager__btn_delete',
1131            'action' => media_managerURL(['delete' => $image], '&'),
1132        ]);
1133        $form->addTagOpen('div')->addClass('no');
1134        $form->addButton('', $lang['btn_delete'])->attr('type', 'submit');
1135        $form->addTagClose('div');
1136        echo '<li>';
1137        echo $form->toHTML();
1138        echo '</li>';
1139    }
1140
1141    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1142    if ($auth >= $auth_ow && !$rev) {
1143        // upload new version button
1144        $form = new Form([
1145            'id' => 'mediamanager__btn_update',
1146            'action' => media_managerURL(['image' => $image, 'mediado' => 'update'], '&'),
1147        ]);
1148        $form->addTagOpen('div')->addClass('no');
1149        $form->addButton('', $lang['media_update'])->attr('type', 'submit');
1150        $form->addTagClose('div');
1151        echo '<li>';
1152        echo $form->toHTML();
1153        echo '</li>';
1154    }
1155
1156    if ($auth >= AUTH_UPLOAD && $rev && $conf['mediarevisions'] && file_exists(mediaFN($image, $rev))) {
1157        // restore button
1158        $form = new Form([
1159            'id' => 'mediamanager__btn_restore',
1160            'action' => media_managerURL(['image' => $image], '&'),
1161        ]);
1162        $form->addTagOpen('div')->addClass('no');
1163        $form->setHiddenField('mediado', 'restore');
1164        $form->setHiddenField('rev', $rev);
1165        $form->addButton('', $lang['media_restore'])->attr('type', 'submit');
1166        $form->addTagClose('div');
1167        echo '<li>';
1168        echo $form->toHTML();
1169        echo '</li>';
1170    }
1171
1172    echo '</ul>';
1173}
1174
1175/**
1176 * Returns image width and height for mediamanager preview panel
1177 *
1178 * @author Kate Arzamastseva <pshns@ukr.net>
1179 * @param string         $image
1180 * @param int|string     $rev
1181 * @param JpegMeta|bool  $meta
1182 * @param int            $size
1183 * @return array
1184 */
1185function media_image_preview_size($image, $rev, $meta = false, $size = 500)
1186{
1187    if (
1188        !preg_match("/\.(jpe?g|gif|png|webp)$/", $image)
1189        || !file_exists($filename = mediaFN($image, $rev))
1190    ) return [];
1191
1192    $info = getimagesize($filename);
1193    $w = $info[0];
1194    $h = $info[1];
1195
1196    if ($meta && ($w > $size || $h > $size)) {
1197        $ratio = $meta->getResizeRatio($size, $size);
1198        $w = floor($w * $ratio);
1199        $h = floor($h * $ratio);
1200    }
1201    return [$w, $h];
1202}
1203
1204/**
1205 * Returns the requested EXIF/IPTC tag from the image meta
1206 *
1207 * @author Kate Arzamastseva <pshns@ukr.net>
1208 *
1209 * @param array    $tags array with tags, first existing is returned
1210 * @param JpegMeta $meta
1211 * @param string   $alt  alternative value
1212 * @return string
1213 */
1214function media_getTag($tags, $meta = false, $alt = '')
1215{
1216    if (!$meta) return $alt;
1217    $info = $meta->getField($tags);
1218    if (!$info) return $alt;
1219    return $info;
1220}
1221
1222/**
1223 * Returns mediafile tags
1224 *
1225 * @author Kate Arzamastseva <pshns@ukr.net>
1226 *
1227 * @param JpegMeta $meta
1228 * @return array list of tags of the mediafile
1229 */
1230function media_file_tags($meta)
1231{
1232    // load the field descriptions
1233    static $fields = null;
1234    if (is_null($fields)) {
1235        $config_files = getConfigFiles('mediameta');
1236        foreach ($config_files as $config_file) {
1237            if (file_exists($config_file)) include($config_file);
1238        }
1239    }
1240
1241    $tags = [];
1242
1243    foreach ($fields as $tag) {
1244        $t = [];
1245        if (!empty($tag[0])) $t = [$tag[0]];
1246        if (isset($tag[3]) && is_array($tag[3])) $t = array_merge($t, $tag[3]);
1247        $value = media_getTag($t, $meta);
1248        $tags[] = ['tag' => $tag, 'value' => $value];
1249    }
1250
1251    return $tags;
1252}
1253
1254/**
1255 * Prints mediafile tags
1256 *
1257 * @author Kate Arzamastseva <pshns@ukr.net>
1258 *
1259 * @param string        $image image id
1260 * @param int           $auth  permission level
1261 * @param string|int    $rev   revision timestamp, or empty string
1262 * @param bool|JpegMeta $meta  image object, or create one if false
1263 */
1264function media_details($image, $auth, $rev = '', $meta = false)
1265{
1266    global $lang;
1267
1268    if (!$meta) $meta = new JpegMeta(mediaFN($image, $rev));
1269    $tags = media_file_tags($meta);
1270
1271    echo '<dl>' . NL;
1272    foreach ($tags as $tag) {
1273        if ($tag['value']) {
1274            $value = cleanText($tag['value']);
1275            echo '<dt>' . $lang[$tag['tag'][1]] . '</dt><dd>';
1276            if ($tag['tag'][2] == 'date') {
1277                echo dformat($value);
1278            } else {
1279                echo hsc($value);
1280            }
1281            echo '</dd>' . NL;
1282        }
1283    }
1284    echo '</dl>' . NL;
1285    echo '<dl>' . NL;
1286    echo '<dt>' . $lang['reference'] . ':</dt>';
1287    $media_usage = (new MetadataSearch())->mediause($image, true);
1288    if ($media_usage !== []) {
1289        foreach ($media_usage as $path) {
1290            echo '<dd>' . html_wikilink($path) . '</dd>';
1291        }
1292    } else {
1293        echo '<dd>' . $lang['nothingfound'] . '</dd>';
1294    }
1295    echo '</dl>' . NL;
1296}
1297
1298/**
1299 * Shows difference between two revisions of file
1300 *
1301 * @author Kate Arzamastseva <pshns@ukr.net>
1302 *
1303 * @param string $image  image id
1304 * @param string $ns
1305 * @param int $auth permission level
1306 * @param bool $fromajax
1307 *
1308 * @deprecated 2020-12-31
1309 */
1310function media_diff($image, $ns, $auth, $fromajax = false)
1311{
1312    dbg_deprecated('see ' . MediaDiff::class . '::show()');
1313}
1314
1315/**
1316 * Callback for media file diff
1317 *
1318 * @param array $data event data
1319 *
1320 * @deprecated 2020-12-31
1321 */
1322function _media_file_diff($data)
1323{
1324    dbg_deprecated('see ' . MediaDiff::class . '::show()');
1325}
1326
1327/**
1328 * Shows difference between two revisions of image
1329 *
1330 * @author Kate Arzamastseva <pshns@ukr.net>
1331 *
1332 * @param string $image
1333 * @param string|int $l_rev revision timestamp, or empty string
1334 * @param string|int $r_rev revision timestamp, or empty string
1335 * @param string $ns
1336 * @param int $auth permission level
1337 * @param bool $fromajax
1338 * @deprecated 2020-12-31
1339 */
1340function media_file_diff($image, $l_rev, $r_rev, $ns, $auth, $fromajax)
1341{
1342    dbg_deprecated('see ' . MediaDiff::class . '::showFileDiff()');
1343}
1344
1345/**
1346 * Prints two images side by side
1347 * and slider
1348 *
1349 * @author Kate Arzamastseva <pshns@ukr.net>
1350 *
1351 * @param string $image   image id
1352 * @param int    $l_rev   revision timestamp, or empty string
1353 * @param int    $r_rev   revision timestamp, or empty string
1354 * @param array  $l_size  array with width and height
1355 * @param array  $r_size  array with width and height
1356 * @param string $type
1357 * @deprecated 2020-12-31
1358 */
1359function media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $type)
1360{
1361    dbg_deprecated('see ' . MediaDiff::class . '::showImageDiff()');
1362}
1363
1364/**
1365 * Restores an old revision of a media file
1366 *
1367 * @param string $image media id
1368 * @param int    $rev   revision timestamp or empty string
1369 * @param int    $auth
1370 * @return string - file's id
1371 *
1372 * @author Kate Arzamastseva <pshns@ukr.net>
1373 */
1374function media_restore($image, $rev, $auth)
1375{
1376    global $conf;
1377    if ($auth < AUTH_UPLOAD || !$conf['mediarevisions']) return false;
1378    $removed = (!file_exists(mediaFN($image)) && file_exists(mediaMetaFN($image, '.changes')));
1379    if (!$image || (!file_exists(mediaFN($image)) && !$removed)) return false;
1380    if (!$rev || !file_exists(mediaFN($image, $rev))) return false;
1381    [, $imime, ] = mimetype($image);
1382    $res = media_upload_finish(
1383        mediaFN($image, $rev),
1384        mediaFN($image),
1385        $image,
1386        $imime,
1387        true,
1388        'copy'
1389    );
1390    if (is_array($res)) {
1391        msg($res[0], $res[1]);
1392        return false;
1393    }
1394    return $res;
1395}
1396
1397/**
1398 * List all files found by the search request
1399 *
1400 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1401 * @author Andreas Gohr <gohr@cosmocode.de>
1402 * @author Kate Arzamastseva <pshns@ukr.net>
1403 * @triggers MEDIA_SEARCH
1404 *
1405 * @param string $query
1406 * @param string $ns
1407 * @param null|int $auth
1408 * @param bool $fullscreen
1409 * @param string $sort
1410 */
1411function media_searchlist($query, $ns, $auth = null, $fullscreen = false, $sort = 'natural')
1412{
1413    global $conf;
1414    global $lang;
1415
1416    $ns = cleanID($ns);
1417    $evdata = [
1418        'ns'    => $ns,
1419        'data'  => [],
1420        'query' => $query
1421    ];
1422    if (!blank($query)) {
1423        $evt = new Event('MEDIA_SEARCH', $evdata);
1424        if ($evt->advise_before()) {
1425            $dir = utf8_encodeFN(str_replace(':', '/', $evdata['ns']));
1426            $quoted = preg_quote($evdata['query'], '/');
1427            //apply globbing
1428            $quoted = str_replace(['\*', '\?'], ['.*', '.'], $quoted, $count);
1429
1430            //if we use globbing file name must match entirely but may be preceded by arbitrary namespace
1431            if ($count > 0) $quoted = '^([^:]*:)*' . $quoted . '$';
1432
1433            $pattern = '/' . $quoted . '/i';
1434            search(
1435                $evdata['data'],
1436                $conf['mediadir'],
1437                'search_mediafiles',
1438                ['showmsg' => false, 'pattern' => $pattern],
1439                $dir,
1440                1,
1441                $sort
1442            );
1443        }
1444        $evt->advise_after();
1445        unset($evt);
1446    }
1447
1448    if (!$fullscreen) {
1449        echo '<h1 id="media__ns">' . sprintf($lang['searchmedia_in'], hsc($ns) . ':*') . '</h1>' . NL;
1450        media_searchform($ns, $query);
1451    }
1452
1453    if (!count($evdata['data'])) {
1454        echo '<div class="nothing">' . $lang['nothingfound'] . '</div>' . NL;
1455    } else {
1456        if ($fullscreen) {
1457            echo '<ul class="' . _media_get_list_type() . '">';
1458        }
1459        foreach ($evdata['data'] as $item) {
1460            if (!$fullscreen) {
1461                // FIXME old call: media_printfile($item,$item['perm'],'',true);
1462                $display = new DisplayRow($item);
1463                $display->relativeDisplay($ns);
1464                $display->show();
1465            } else {
1466                // FIXME old call: media_printfile_thumbs($item,$item['perm'],false,true);
1467                $display = new DisplayTile($item);
1468                $display->relativeDisplay($ns);
1469                echo '<li>';
1470                $display->show();
1471                echo '</li>';
1472            }
1473        }
1474        if ($fullscreen) echo '</ul>' . NL;
1475    }
1476}
1477
1478/**
1479 * Display a media icon
1480 *
1481 * @param string $filename media id
1482 * @param string $size     the size subfolder, if not specified 16x16 is used
1483 * @return string html
1484 */
1485function media_printicon($filename, $size = '')
1486{
1487    [$ext] = mimetype(mediaFN($filename), false);
1488
1489    if (file_exists(DOKU_INC . 'lib/images/fileicons/' . $size . '/' . $ext . '.png')) {
1490        $icon = DOKU_BASE . 'lib/images/fileicons/' . $size . '/' . $ext . '.png';
1491    } else {
1492        $icon = DOKU_BASE . 'lib/images/fileicons/' . $size . '/file.png';
1493    }
1494
1495    return '<img src="' . $icon . '" alt="' . $filename . '" class="icon" />';
1496}
1497
1498/**
1499 * Build link based on the current, adding/rewriting parameters
1500 *
1501 * @author Kate Arzamastseva <pshns@ukr.net>
1502 *
1503 * @param array|bool $params
1504 * @param string     $amp           separator
1505 * @param bool       $abs           absolute url?
1506 * @param bool       $params_array  return the parmeters array?
1507 * @return string|array - link or link parameters
1508 */
1509function media_managerURL($params = false, $amp = '&amp;', $abs = false, $params_array = false)
1510{
1511    global $ID;
1512    global $INPUT;
1513
1514    $gets = ['do' => 'media'];
1515    $media_manager_params = ['tab_files', 'tab_details', 'image', 'ns', 'list', 'sort'];
1516    foreach ($media_manager_params as $x) {
1517        if ($INPUT->has($x)) $gets[$x] = $INPUT->str($x);
1518    }
1519
1520    if ($params) {
1521        $gets = $params + $gets;
1522    }
1523    unset($gets['id']);
1524    if (isset($gets['delete'])) {
1525        unset($gets['image']);
1526        unset($gets['tab_details']);
1527    }
1528
1529    if ($params_array) return $gets;
1530
1531    return wl($ID, $gets, $abs, $amp);
1532}
1533
1534/**
1535 * Print the media upload form if permissions are correct
1536 *
1537 * @author Andreas Gohr <andi@splitbrain.org>
1538 * @author Kate Arzamastseva <pshns@ukr.net>
1539 *
1540 * @param string $ns
1541 * @param int    $auth permission level
1542 * @param bool  $fullscreen
1543 */
1544function media_uploadform($ns, $auth, $fullscreen = false)
1545{
1546    global $lang;
1547    global $conf;
1548    global $INPUT;
1549
1550    if ($auth < AUTH_UPLOAD) {
1551        echo '<div class="nothing">' . $lang['media_perm_upload'] . '</div>' . NL;
1552        return;
1553    }
1554    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1555
1556    $update = false;
1557    $id = '';
1558    if ($auth >= $auth_ow && $fullscreen && $INPUT->str('mediado') == 'update') {
1559        $update = true;
1560        $id = cleanID($INPUT->str('image'));
1561    }
1562
1563    // The default HTML upload form
1564    $form = new Form([
1565        'id' => 'dw__upload',
1566        'enctype' => 'multipart/form-data',
1567        'action' => ($fullscreen)
1568                    ? media_managerURL(['tab_files' => 'files', 'tab_details' => 'view'], '&')
1569                    : DOKU_BASE . 'lib/exe/mediamanager.php',
1570    ]);
1571    $form->addTagOpen('div')->addClass('no');
1572    $form->setHiddenField('ns', hsc($ns));  // FIXME hsc required?
1573    $form->addTagOpen('p');
1574    $form->addTextInput('upload', $lang['txt_upload'])->id('upload__file')
1575            ->attrs(['type' => 'file']);
1576    $form->addTagClose('p');
1577    $form->addTagOpen('p');
1578    $form->addTextInput('mediaid', $lang['txt_filename'])->id('upload__name')
1579            ->val(noNS($id));
1580    $form->addButton('', $lang['btn_upload'])->attr('type', 'submit');
1581    $form->addTagClose('p');
1582    if ($auth >= $auth_ow) {
1583        $form->addTagOpen('p');
1584        $attrs = [];
1585        if ($update) $attrs['checked'] = 'checked';
1586        $form->addCheckbox('ow', $lang['txt_overwrt'])->id('dw__ow')->val('1')
1587            ->addClass('check')->attrs($attrs);
1588        $form->addTagClose('p');
1589    }
1590    $form->addTagClose('div');
1591
1592    if (!$fullscreen) {
1593        echo '<div class="upload">' . $lang['mediaupload'] . '</div>' . DOKU_LF;
1594    } else {
1595        echo DOKU_LF;
1596    }
1597
1598    echo '<div id="mediamanager__uploader">' . DOKU_LF;
1599    echo $form->toHTML('Upload');
1600    echo '</div>' . DOKU_LF;
1601
1602    echo '<p class="maxsize">';
1603    printf($lang['maxuploadsize'], filesize_h(media_getuploadsize()));
1604    echo ' <a class="allowedmime" href="#">' . $lang['allowedmime'] . '</a>';
1605    echo ' <span>' . implode(', ', array_keys(getMimeTypes())) . '</span>';
1606    echo '</p>' . DOKU_LF;
1607}
1608
1609/**
1610 * Returns the size uploaded files may have
1611 *
1612 * This uses a conservative approach using the lowest number found
1613 * in any of the limiting ini settings
1614 *
1615 * @returns int size in bytes
1616 */
1617function media_getuploadsize()
1618{
1619    $okay = 0;
1620
1621    $post = php_to_byte(@ini_get('post_max_size'));
1622    $suho = php_to_byte(@ini_get('suhosin.post.max_value_length'));
1623    $upld = php_to_byte(@ini_get('upload_max_filesize'));
1624
1625    if ($post && ($post < $okay || $okay === 0)) $okay = $post;
1626    if ($suho && ($suho < $okay || $okay == 0)) $okay = $suho;
1627    if ($upld && ($upld < $okay || $okay == 0)) $okay = $upld;
1628
1629    return $okay;
1630}
1631
1632/**
1633 * Print the search field form
1634 *
1635 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1636 * @author Kate Arzamastseva <pshns@ukr.net>
1637 *
1638 * @param string $ns
1639 * @param string $query
1640 * @param bool $fullscreen
1641 */
1642function media_searchform($ns, $query = '', $fullscreen = false)
1643{
1644    global $lang;
1645
1646    // The default HTML search form
1647    $form = new Form([
1648        'id'     => 'dw__mediasearch',
1649        'action' => ($fullscreen)
1650                    ? media_managerURL([], '&')
1651                    : DOKU_BASE . 'lib/exe/mediamanager.php',
1652    ]);
1653    $form->addTagOpen('div')->addClass('no');
1654    $form->setHiddenField('ns', $ns);
1655    $form->setHiddenField($fullscreen ? 'mediado' : 'do', 'searchlist');
1656
1657    $form->addTagOpen('p');
1658    $form->addTextInput('q', $lang['searchmedia'])
1659            ->attr('title', sprintf($lang['searchmedia_in'], hsc($ns) . ':*'))
1660            ->val($query);
1661    $form->addHTML(' ');
1662    $form->addButton('', $lang['btn_search'])->attr('type', 'submit');
1663    $form->addTagClose('p');
1664    $form->addTagClose('div');
1665    echo $form->toHTML('SearchMedia');
1666}
1667
1668/**
1669 * Build a tree outline of available media namespaces
1670 *
1671 * @author Andreas Gohr <andi@splitbrain.org>
1672 *
1673 * @param string $ns
1674 */
1675function media_nstree($ns)
1676{
1677    global $conf;
1678    global $lang;
1679
1680    // currently selected namespace
1681    $ns = cleanID($ns);
1682    if (empty($ns)) {
1683        global $ID;
1684        $ns = (string)getNS($ID);
1685    }
1686
1687    $ns_dir = utf8_encodeFN(str_replace(':', '/', $ns));
1688
1689    $data = [];
1690    search($data, $conf['mediadir'], 'search_index', ['ns' => $ns_dir, 'nofiles' => true]);
1691
1692    // wrap a list with the root level around the other namespaces
1693    array_unshift($data, ['level' => 0, 'id' => '', 'open' => 'true', 'label' => '[' . $lang['mediaroot'] . ']']);
1694
1695    // insert the current ns into the hierarchy if it isn't already part of it
1696    $ns_parts = explode(':', $ns);
1697    $tmp_ns = '';
1698    $pos = 0;
1699    $insert = false;
1700    foreach ($ns_parts as $level => $part) {
1701        if ($tmp_ns) {
1702            $tmp_ns .= ':' . $part;
1703        } else {
1704            $tmp_ns = $part;
1705        }
1706
1707        // find the namespace parts
1708        while (array_key_exists($pos, $data) && $data[$pos]['id'] != $tmp_ns) {
1709            if (
1710                $pos >= count($data) ||
1711                ($data[$pos]['level'] <= $level + 1 && Sort::strcmp($data[$pos]['id'], $tmp_ns) > 0)
1712            ) {
1713                $insert = true;
1714                break;
1715            }
1716            ++$pos;
1717        }
1718        // insert namespace in hierarchy; if not found in above loop, append it to the end
1719        if ($insert || $pos === count($data)) {
1720            array_splice($data, $pos, 0, [['level' => $level + 1, 'id' => $tmp_ns, 'open' => 'true']]);
1721        }
1722    }
1723
1724    echo html_buildlist($data, 'idx', 'media_nstree_item', 'media_nstree_li');
1725}
1726
1727/**
1728 * Userfunction for html_buildlist
1729 *
1730 * Prints a media namespace tree item
1731 *
1732 * @author Andreas Gohr <andi@splitbrain.org>
1733 *
1734 * @param array $item
1735 * @return string html
1736 */
1737function media_nstree_item($item)
1738{
1739    global $INPUT;
1740    $pos   = strrpos($item['id'], ':');
1741    $label = substr($item['id'], $pos > 0 ? $pos + 1 : 0);
1742    if (empty($item['label'])) $item['label'] = $label;
1743
1744    $ret  = '';
1745    if ($INPUT->str('do') != 'media')
1746    $ret .= '<a href="' . DOKU_BASE . 'lib/exe/mediamanager.php?ns=' . idfilter($item['id']) . '" class="idx_dir">';
1747    else $ret .= '<a href="' . media_managerURL(['ns' => idfilter($item['id'], false), 'tab_files' => 'files'])
1748        . '" class="idx_dir">';
1749    $ret .= $item['label'];
1750    $ret .= '</a>';
1751    return $ret;
1752}
1753
1754/**
1755 * Userfunction for html_buildlist
1756 *
1757 * Prints a media namespace tree item opener
1758 *
1759 * @author Andreas Gohr <andi@splitbrain.org>
1760 *
1761 * @param array $item
1762 * @return string html
1763 */
1764function media_nstree_li($item)
1765{
1766    $class = 'media level' . $item['level'];
1767    if ($item['open']) {
1768        $class .= ' open';
1769        $img   = DOKU_BASE . 'lib/images/minus.gif';
1770        $alt   = '−';
1771    } else {
1772        $class .= ' closed';
1773        $img   = DOKU_BASE . 'lib/images/plus.gif';
1774        $alt   = '+';
1775    }
1776    // TODO: only deliver an image if it actually has a subtree...
1777    return '<li class="' . $class . '">' .
1778        '<img src="' . $img . '" alt="' . $alt . '" />';
1779}
1780
1781/**
1782 * Resizes or crop the given image to the given size
1783 *
1784 * @author  Andreas Gohr <andi@splitbrain.org>
1785 *
1786 * @param string $file filename, path to file
1787 * @param string $ext  extension
1788 * @param int    $w    desired width
1789 * @param int    $h    desired height
1790 * @param bool   $crop should a center crop be used?
1791 * @return string path to resized or original size if failed
1792 */
1793function media_mod_image($file, $ext, $w, $h = 0, $crop = false)
1794{
1795    global $conf;
1796    if (!$h) $h = 0;
1797    // we wont scale up to infinity
1798    if ($w > 2000 || $h > 2000) return $file;
1799
1800    $operation = $crop ? 'crop' : 'resize';
1801
1802    $options = [
1803        'quality' => $conf['jpg_quality'],
1804        'imconvert' => $conf['im_convert'],
1805    ];
1806
1807    $cache = new CacheImageMod($file, $w, $h, $ext, $crop);
1808    if (!$cache->useCache()) {
1809        try {
1810            Slika::run($file, $options)
1811                 ->autorotate()
1812                 ->$operation($w, $h)
1813                 ->save($cache->cache, $ext);
1814            if ($conf['fperm']) @chmod($cache->cache, $conf['fperm']);
1815        } catch (Exception $e) {
1816            Logger::debug($e->getMessage());
1817            return $file;
1818        }
1819    }
1820
1821    return $cache->cache;
1822}
1823
1824/**
1825 * Resizes the given image to the given size
1826 *
1827 * @author  Andreas Gohr <andi@splitbrain.org>
1828 *
1829 * @param string $file filename, path to file
1830 * @param string $ext  extension
1831 * @param int    $w    desired width
1832 * @param int    $h    desired height
1833 * @return string path to resized or original size if failed
1834 */
1835function media_resize_image($file, $ext, $w, $h = 0)
1836{
1837    return media_mod_image($file, $ext, $w, $h, false);
1838}
1839
1840/**
1841 * Center crops the given image to the wanted size
1842 *
1843 * @author  Andreas Gohr <andi@splitbrain.org>
1844 *
1845 * @param string $file filename, path to file
1846 * @param string $ext  extension
1847 * @param int    $w    desired width
1848 * @param int    $h    desired height
1849 * @return string path to resized or original size if failed
1850 */
1851function media_crop_image($file, $ext, $w, $h = 0)
1852{
1853    return media_mod_image($file, $ext, $w, $h, true);
1854}
1855
1856/**
1857 * Calculate a token to be used to verify fetch requests for resized or
1858 * cropped images have been internally generated - and prevent external
1859 * DDOS attacks via fetch
1860 *
1861 * @author Christopher Smith <chris@jalakai.co.uk>
1862 *
1863 * @param string  $id    id of the image
1864 * @param int     $w     resize/crop width
1865 * @param int     $h     resize/crop height
1866 * @return string token or empty string if no token required
1867 */
1868function media_get_token($id, $w, $h)
1869{
1870    // token is only required for modified images
1871    if ($w || $h || media_isexternal($id)) {
1872        $token = $id;
1873        if ($w) $token .= '.' . $w;
1874        if ($h) $token .= '.' . $h;
1875
1876        return substr(PassHash::hmac('md5', $token, auth_cookiesalt()), 0, 6);
1877    }
1878
1879    return '';
1880}
1881
1882/**
1883 * Download a remote file and return local filename
1884 *
1885 * returns false if download fails. Uses cached file if available and
1886 * wanted
1887 *
1888 * @author  Andreas Gohr <andi@splitbrain.org>
1889 * @author  Pavel Vitis <Pavel.Vitis@seznam.cz>
1890 *
1891 * @param string $url
1892 * @param string $ext   extension
1893 * @param int    $cache cachetime in seconds
1894 * @return false|string path to cached file
1895 */
1896function media_get_from_URL($url, $ext, $cache)
1897{
1898    global $conf;
1899
1900    // if no cache or fetchsize just redirect
1901    if ($cache == 0)           return false;
1902    if (!$conf['fetchsize']) return false;
1903
1904    $local = getCacheName(strtolower($url), ".media.$ext");
1905    $mtime = @filemtime($local); // 0 if not exists
1906
1907    //decide if download needed:
1908    if (
1909        ($mtime == 0) || // cache does not exist
1910        ($cache != -1 && $mtime < time() - $cache) // 'recache' and cache has expired
1911    ) {
1912        if (media_image_download($url, $local)) {
1913            return $local;
1914        } else {
1915            return false;
1916        }
1917    }
1918
1919    //if cache exists use it else
1920    if ($mtime) return $local;
1921
1922    //else return false
1923    return false;
1924}
1925
1926/**
1927 * Download image files
1928 *
1929 * @author Andreas Gohr <andi@splitbrain.org>
1930 *
1931 * @param string $url
1932 * @param string $file path to file in which to put the downloaded content
1933 * @return bool
1934 */
1935function media_image_download($url, $file)
1936{
1937    global $conf;
1938    $http = new DokuHTTPClient();
1939    $http->keep_alive = false; // we do single ops here, no need for keep-alive
1940
1941    $http->max_bodysize = $conf['fetchsize'];
1942    $http->timeout = 25; //max. 25 sec
1943    $http->header_regexp = '!\r\nContent-Type: image/(jpe?g|gif|png)!i';
1944
1945    $data = $http->get($url);
1946    if (!$data) return false;
1947
1948    $fileexists = file_exists($file);
1949    $fp = @fopen($file, "w");
1950    if (!$fp) return false;
1951    fwrite($fp, $data);
1952    fclose($fp);
1953    if (!$fileexists && $conf['fperm']) chmod($file, $conf['fperm']);
1954
1955    // check if it is really an image
1956    $info = @getimagesize($file);
1957    if (!$info) {
1958        @unlink($file);
1959        return false;
1960    }
1961
1962    return true;
1963}
1964
1965/**
1966 * resize images using external ImageMagick convert program
1967 *
1968 * @author Pavel Vitis <Pavel.Vitis@seznam.cz>
1969 * @author Andreas Gohr <andi@splitbrain.org>
1970 *
1971 * @param string $ext     extension
1972 * @param string $from    filename path to file
1973 * @param int    $from_w  original width
1974 * @param int    $from_h  original height
1975 * @param string $to      path to resized file
1976 * @param int    $to_w    desired width
1977 * @param int    $to_h    desired height
1978 * @return bool
1979 */
1980function media_resize_imageIM($ext, $from, $from_w, $from_h, $to, $to_w, $to_h)
1981{
1982    global $conf;
1983
1984    // check if convert is configured
1985    if (!$conf['im_convert']) return false;
1986
1987    // prepare command
1988    $cmd  = $conf['im_convert'];
1989    $cmd .= ' -resize ' . $to_w . 'x' . $to_h . '!';
1990    if ($ext == 'jpg' || $ext == 'jpeg') {
1991        $cmd .= ' -quality ' . $conf['jpg_quality'];
1992    }
1993    $cmd .= " $from $to";
1994
1995    @exec($cmd, $out, $retval);
1996    if ($retval == 0) return true;
1997    return false;
1998}
1999
2000/**
2001 * crop images using external ImageMagick convert program
2002 *
2003 * @author Andreas Gohr <andi@splitbrain.org>
2004 *
2005 * @param string $ext     extension
2006 * @param string $from    filename path to file
2007 * @param int    $from_w  original width
2008 * @param int    $from_h  original height
2009 * @param string $to      path to resized file
2010 * @param int    $to_w    desired width
2011 * @param int    $to_h    desired height
2012 * @param int    $ofs_x   offset of crop centre
2013 * @param int    $ofs_y   offset of crop centre
2014 * @return bool
2015 * @deprecated 2020-09-01
2016 */
2017function media_crop_imageIM($ext, $from, $from_w, $from_h, $to, $to_w, $to_h, $ofs_x, $ofs_y)
2018{
2019    global $conf;
2020    dbg_deprecated('splitbrain\\Slika');
2021
2022    // check if convert is configured
2023    if (!$conf['im_convert']) return false;
2024
2025    // prepare command
2026    $cmd  = $conf['im_convert'];
2027    $cmd .= ' -crop ' . $to_w . 'x' . $to_h . '+' . $ofs_x . '+' . $ofs_y;
2028    if ($ext == 'jpg' || $ext == 'jpeg') {
2029        $cmd .= ' -quality ' . $conf['jpg_quality'];
2030    }
2031    $cmd .= " $from $to";
2032
2033    @exec($cmd, $out, $retval);
2034    if ($retval == 0) return true;
2035    return false;
2036}
2037
2038/**
2039 * resize or crop images using PHP's libGD support
2040 *
2041 * @author Andreas Gohr <andi@splitbrain.org>
2042 * @author Sebastian Wienecke <s_wienecke@web.de>
2043 *
2044 * @param string $ext     extension
2045 * @param string $from    filename path to file
2046 * @param int    $from_w  original width
2047 * @param int    $from_h  original height
2048 * @param string $to      path to resized file
2049 * @param int    $to_w    desired width
2050 * @param int    $to_h    desired height
2051 * @param int    $ofs_x   offset of crop centre
2052 * @param int    $ofs_y   offset of crop centre
2053 * @return bool
2054 * @deprecated 2020-09-01
2055 */
2056function media_resize_imageGD($ext, $from, $from_w, $from_h, $to, $to_w, $to_h, $ofs_x = 0, $ofs_y = 0)
2057{
2058    global $conf;
2059    dbg_deprecated('splitbrain\\Slika');
2060
2061    if ($conf['gdlib'] < 1) return false; //no GDlib available or wanted
2062
2063    // check available memory
2064    if (!is_mem_available(($from_w * $from_h * 4) + ($to_w * $to_h * 4))) {
2065        return false;
2066    }
2067
2068    // create an image of the given filetype
2069    $image = false;
2070    if ($ext == 'jpg' || $ext == 'jpeg') {
2071        if (!function_exists("imagecreatefromjpeg")) return false;
2072        $image = @imagecreatefromjpeg($from);
2073    } elseif ($ext == 'png') {
2074        if (!function_exists("imagecreatefrompng")) return false;
2075        $image = @imagecreatefrompng($from);
2076    } elseif ($ext == 'gif') {
2077        if (!function_exists("imagecreatefromgif")) return false;
2078        $image = @imagecreatefromgif($from);
2079    }
2080    if (!$image) return false;
2081
2082    $newimg = false;
2083    if (($conf['gdlib'] > 1) && function_exists("imagecreatetruecolor") && $ext != 'gif') {
2084        $newimg = @imagecreatetruecolor($to_w, $to_h);
2085    }
2086    if (!$newimg) $newimg = @imagecreate($to_w, $to_h);
2087    if (!$newimg) {
2088        imagedestroy($image);
2089        return false;
2090    }
2091
2092    //keep png alpha channel if possible
2093    if ($ext == 'png' && $conf['gdlib'] > 1 && function_exists('imagesavealpha')) {
2094        imagealphablending($newimg, false);
2095        imagesavealpha($newimg, true);
2096    }
2097
2098    //keep gif transparent color if possible
2099    if ($ext == 'gif' && function_exists('imagefill') && function_exists('imagecolorallocate')) {
2100        if (function_exists('imagecolorsforindex') && function_exists('imagecolortransparent')) {
2101            $transcolorindex = @imagecolortransparent($image);
2102            if ($transcolorindex >= 0) { //transparent color exists
2103                $transcolor = @imagecolorsforindex($image, $transcolorindex);
2104                $transcolorindex = @imagecolorallocate(
2105                    $newimg,
2106                    $transcolor['red'],
2107                    $transcolor['green'],
2108                    $transcolor['blue']
2109                );
2110                @imagefill($newimg, 0, 0, $transcolorindex);
2111                @imagecolortransparent($newimg, $transcolorindex);
2112            } else { //filling with white
2113                $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2114                @imagefill($newimg, 0, 0, $whitecolorindex);
2115            }
2116        } else { //filling with white
2117            $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2118            @imagefill($newimg, 0, 0, $whitecolorindex);
2119        }
2120    }
2121
2122    //try resampling first
2123    if (function_exists("imagecopyresampled")) {
2124        if (!@imagecopyresampled($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h)) {
2125            imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2126        }
2127    } else {
2128        imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2129    }
2130
2131    $okay = false;
2132    if ($ext == 'jpg' || $ext == 'jpeg') {
2133        if (!function_exists('imagejpeg')) {
2134            $okay = false;
2135        } else {
2136            $okay = imagejpeg($newimg, $to, $conf['jpg_quality']);
2137        }
2138    } elseif ($ext == 'png') {
2139        if (!function_exists('imagepng')) {
2140            $okay = false;
2141        } else {
2142            $okay =  imagepng($newimg, $to);
2143        }
2144    } elseif ($ext == 'gif') {
2145        if (!function_exists('imagegif')) {
2146            $okay = false;
2147        } else {
2148            $okay = imagegif($newimg, $to);
2149        }
2150    }
2151
2152    // destroy GD image resources
2153    imagedestroy($image);
2154    imagedestroy($newimg);
2155
2156    return $okay;
2157}
2158
2159/**
2160 * Return other media files with the same base name
2161 * but different extensions.
2162 *
2163 * @param string   $src     - ID of media file
2164 * @param string[] $exts    - alternative extensions to find other files for
2165 * @return array            - array(mime type => file ID)
2166 *
2167 * @author Anika Henke <anika@selfthinker.org>
2168 */
2169function media_alternativefiles($src, $exts)
2170{
2171
2172    $files = [];
2173    [$srcExt, /* srcMime */] = mimetype($src);
2174    $filebase = substr($src, 0, -1 * (strlen($srcExt) + 1));
2175
2176    foreach ($exts as $ext) {
2177        $fileid = $filebase . '.' . $ext;
2178        $file = mediaFN($fileid);
2179        if (file_exists($file)) {
2180            [/* fileExt */, $fileMime] = mimetype($file);
2181            $files[$fileMime] = $fileid;
2182        }
2183    }
2184    return $files;
2185}
2186
2187/**
2188 * Check if video/audio is supported to be embedded.
2189 *
2190 * @param string $mime      - mimetype of media file
2191 * @param string $type      - type of media files to check ('video', 'audio', or null for all)
2192 * @return boolean
2193 *
2194 * @author Anika Henke <anika@selfthinker.org>
2195 */
2196function media_supportedav($mime, $type = null)
2197{
2198    $supportedAudio = [
2199        'ogg' => 'audio/ogg',
2200        'mp3' => 'audio/mpeg',
2201        'wav' => 'audio/wav'
2202    ];
2203    $supportedVideo = [
2204        'webm' => 'video/webm',
2205        'ogv' => 'video/ogg',
2206        'mp4' => 'video/mp4'
2207    ];
2208    if ($type == 'audio') {
2209        $supportedAv = $supportedAudio;
2210    } elseif ($type == 'video') {
2211        $supportedAv = $supportedVideo;
2212    } else {
2213        $supportedAv = array_merge($supportedAudio, $supportedVideo);
2214    }
2215    return in_array($mime, $supportedAv);
2216}
2217
2218/**
2219 * Return track media files with the same base name
2220 * but extensions that indicate kind and lang.
2221 * ie for foo.webm search foo.sub.lang.vtt, foo.cap.lang.vtt...
2222 *
2223 * @param string   $src     - ID of media file
2224 * @return array            - array(mediaID => array( kind, srclang ))
2225 *
2226 * @author Schplurtz le Déboulonné <Schplurtz@laposte.net>
2227 */
2228function media_trackfiles($src)
2229{
2230    $kinds = [
2231        'sub' => 'subtitles',
2232        'cap' => 'captions',
2233        'des' => 'descriptions',
2234        'cha' => 'chapters',
2235        'met' => 'metadata'
2236    ];
2237
2238    $files = [];
2239    $re = '/\\.(sub|cap|des|cha|met)\\.([^.]+)\\.vtt$/';
2240    $baseid = pathinfo($src, PATHINFO_FILENAME);
2241    $pattern = mediaFN($baseid) . '.*.*.vtt';
2242    $list = glob($pattern);
2243    foreach ($list as $track) {
2244        if (preg_match($re, $track, $matches)) {
2245            $files[$baseid . '.' . $matches[1] . '.' . $matches[2] . '.vtt'] = [$kinds[$matches[1]], $matches[2]];
2246        }
2247    }
2248    return $files;
2249}
2250
2251/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
2252