xref: /dokuwiki/inc/media.php (revision e6adf5b790d7dfdcd235614ffbb7c74dba9500e0) 
1<?php
2/**
3 * All output and handler function needed for the media management popup
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8
9use dokuwiki\ChangeLog\MediaChangeLog;
10use dokuwiki\HTTP\DokuHTTPClient;
11use dokuwiki\Subscriptions\MediaSubscriptionSender;
12use dokuwiki\Extension\Event;
13use dokuwiki\Form\Form;
14
15/**
16 * Lists pages which currently use a media file selected for deletion
17 *
18 * References uses the same visual as search results and share
19 * their CSS tags except pagenames won't be links.
20 *
21 * @author Matthias Grimm <matthiasgrimm@users.sourceforge.net>
22 *
23 * @param array $data
24 * @param string $id
25 */
26function media_filesinuse($data,$id){
27    global $lang;
28    echo '<h1>'.$lang['reference'].' <code>'.hsc(noNS($id)).'</code></h1>';
29    echo '<p>'.hsc($lang['ref_inuse']).'</p>';
30
31    $hidden=0; //count of hits without read permission
32    foreach($data as $row){
33        if(auth_quickaclcheck($row) >= AUTH_READ && isVisiblePage($row)){
34            echo '<div class="search_result">';
35            echo '<span class="mediaref_ref">'.hsc($row).'</span>';
36            echo '</div>';
37        }else
38            $hidden++;
39    }
40    if ($hidden){
41        print '<div class="mediaref_hidden">'.$lang['ref_hidden'].'</div>';
42    }
43}
44
45/**
46 * Handles the saving of image meta data
47 *
48 * @author Andreas Gohr <andi@splitbrain.org>
49 * @author Kate Arzamastseva <pshns@ukr.net>
50 *
51 * @param string $id media id
52 * @param int $auth permission level
53 * @param array $data
54 * @return false|string
55 */
56function media_metasave($id,$auth,$data){
57    if($auth < AUTH_UPLOAD) return false;
58    if(!checkSecurityToken()) return false;
59    global $lang;
60    global $conf;
61    $src = mediaFN($id);
62
63    $meta = new JpegMeta($src);
64    $meta->_parseAll();
65
66    foreach($data as $key => $val){
67        $val=trim($val);
68        if(empty($val)){
69            $meta->deleteField($key);
70        }else{
71            $meta->setField($key,$val);
72        }
73    }
74
75    $old = @filemtime($src);
76    if(!file_exists(mediaFN($id, $old)) && file_exists($src)) {
77        // add old revision to the attic
78        media_saveOldRevision($id);
79    }
80    $filesize_old = filesize($src);
81    if($meta->save()){
82        if($conf['fperm']) chmod($src, $conf['fperm']);
83        @clearstatcache(true, $src);
84        $new = @filemtime($src);
85        $filesize_new = filesize($src);
86        $sizechange = $filesize_new - $filesize_old;
87
88        // add a log entry to the media changelog
89        addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT, $lang['media_meta_edited'], '', null, $sizechange);
90
91        msg($lang['metasaveok'],1);
92        return $id;
93    }else{
94        msg($lang['metasaveerr'],-1);
95        return false;
96    }
97}
98
99/**
100 * check if a media is external source
101 *
102 * @author Gerrit Uitslag <klapinklapin@gmail.com>
103 *
104 * @param string $id the media ID or URL
105 * @return bool
106 */
107function media_isexternal($id){
108    if (preg_match('#^(?:https?|ftp)://#i', $id)) return true;
109    return false;
110}
111
112/**
113 * Check if a media item is public (eg, external URL or readable by @ALL)
114 *
115 * @author Andreas Gohr <andi@splitbrain.org>
116 *
117 * @param string $id  the media ID or URL
118 * @return bool
119 */
120function media_ispublic($id){
121    if(media_isexternal($id)) return true;
122    $id = cleanID($id);
123    if(auth_aclcheck(getNS($id).':*', '', array()) >= AUTH_READ) return true;
124    return false;
125}
126
127/**
128 * Display the form to edit image meta data
129 *
130 * @author Andreas Gohr <andi@splitbrain.org>
131 * @author Kate Arzamastseva <pshns@ukr.net>
132 *
133 * @param string $id media id
134 * @param int $auth permission level
135 * @return bool
136 */
137function media_metaform($id, $auth) {
138    global $lang;
139
140    if ($auth < AUTH_UPLOAD) {
141        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.DOKU_LF;
142        return false;
143    }
144
145    // load the field descriptions
146    static $fields = null;
147    if ($fields === null) {
148        $config_files = getConfigFiles('mediameta');
149        foreach ($config_files as $config_file) {
150            if (file_exists($config_file)) include($config_file);
151        }
152    }
153
154    $src = mediaFN($id);
155
156    // output
157    $form = new Form([
158            'action' => media_managerURL(['tab_details' => 'view'], '&'),
159            'class' => 'meta'
160    ]);
161    $form->addTagOpen('div')->addClass('no');
162    $form->setHiddenField('img', $id);
163    $form->setHiddenField('mediado', 'save');
164    foreach ($fields as $key => $field) {
165        // get current value
166        if (empty($field[0])) continue;
167        $tags = array($field[0]);
168        if (is_array($field[3])) $tags = array_merge($tags, $field[3]);
169        $value = tpl_img_getTag($tags, '', $src);
170        $value = cleanText($value);
171
172        // prepare attributes
173        $p = array(
174            'class' => 'edit',
175            'id'    => 'meta__'.$key,
176            'name'  => 'meta['.$field[0].']',
177        );
178
179        $form->addTagOpen('div')->addClass('row');
180        if ($field[2] == 'text') {
181            $input = $form->addTextInput(
182                $p['name'],
183                ($lang[$field[1]] ? $lang[$field[1]] : $field[1] . ':')
184            )->id($p['id'])->addClass($p['class'])->val($value);
185        } else {
186            $form->addTextarea($p['name'], $lang[$field[1]])->id($p['id'])
187                ->val(formText($value))
188                ->addClass($p['class'])
189                ->attr('rows', '6')->attr('cols', '50');
190        }
191        $form->addTagClose('div');
192    }
193    $form->addTagOpen('div')->addClass('buttons');
194    $form->addButton('mediado[save]', $lang['btn_save'])->attr('type', 'submit')
195        ->attrs(['accesskey' => 's']);
196    $form->addTagClose('div');
197
198    $form->addTagClose('div');
199    echo $form->toHTML();
200    return true;
201}
202
203/**
204 * Convenience function to check if a media file is still in use
205 *
206 * @author Michael Klier <chi@chimeric.de>
207 *
208 * @param string $id media id
209 * @return array|bool
210 */
211function media_inuse($id) {
212    global $conf;
213
214    if($conf['refcheck']){
215        $mediareferences = ft_mediause($id,true);
216        if(!count($mediareferences)) {
217            return false;
218        } else {
219            return $mediareferences;
220        }
221    } else {
222        return false;
223    }
224}
225
226/**
227 * Handles media file deletions
228 *
229 * If configured, checks for media references before deletion
230 *
231 * @author             Andreas Gohr <andi@splitbrain.org>
232 *
233 * @param string $id media id
234 * @param int $auth no longer used
235 * @return int One of: 0,
236 *                     DOKU_MEDIA_DELETED,
237 *                     DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS,
238 *                     DOKU_MEDIA_NOT_AUTH,
239 *                     DOKU_MEDIA_INUSE
240 */
241function media_delete($id,$auth){
242    global $lang;
243    $auth = auth_quickaclcheck(ltrim(getNS($id).':*', ':'));
244    if($auth < AUTH_DELETE) return DOKU_MEDIA_NOT_AUTH;
245    if(media_inuse($id)) return DOKU_MEDIA_INUSE;
246
247    $file = mediaFN($id);
248
249    // trigger an event - MEDIA_DELETE_FILE
250    $data = array();
251    $data['id']   = $id;
252    $data['name'] = \dokuwiki\Utf8\PhpString::basename($file);
253    $data['path'] = $file;
254    $data['size'] = (file_exists($file)) ? filesize($file) : 0;
255
256    $data['unl'] = false;
257    $data['del'] = false;
258    $evt = new Event('MEDIA_DELETE_FILE',$data);
259    if ($evt->advise_before()) {
260        $old = @filemtime($file);
261        if(!file_exists(mediaFN($id, $old)) && file_exists($file)) {
262            // add old revision to the attic
263            media_saveOldRevision($id);
264        }
265
266        $data['unl'] = @unlink($file);
267        if($data['unl']) {
268            $sizechange = 0 - $data['size'];
269            addMediaLogEntry(time(), $id, DOKU_CHANGE_TYPE_DELETE, $lang['deleted'], '', null, $sizechange);
270
271            $data['del'] = io_sweepNS($id, 'mediadir');
272        }
273    }
274    $evt->advise_after();
275    unset($evt);
276
277    if($data['unl'] && $data['del']){
278        return DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS;
279    }
280
281    return $data['unl'] ? DOKU_MEDIA_DELETED : 0;
282}
283
284/**
285 * Handle file uploads via XMLHttpRequest
286 *
287 * @param string $ns   target namespace
288 * @param int    $auth current auth check result
289 * @return false|string false on error, id of the new file on success
290 */
291function media_upload_xhr($ns,$auth){
292    if(!checkSecurityToken()) return false;
293    global $INPUT;
294
295    $id = $INPUT->get->str('qqfile');
296    list($ext,$mime) = mimetype($id);
297    $input = fopen("php://input", "r");
298    if (!($tmp = io_mktmpdir())) return false;
299    $path = $tmp.'/'.md5($id);
300    $target = fopen($path, "w");
301    $realSize = stream_copy_to_stream($input, $target);
302    fclose($target);
303    fclose($input);
304    if (isset($_SERVER["CONTENT_LENGTH"]) && ($realSize != (int)$_SERVER["CONTENT_LENGTH"])){
305        unlink($path);
306        return false;
307    }
308
309    $res = media_save(
310        array('name' => $path,
311            'mime' => $mime,
312            'ext'  => $ext),
313        $ns.':'.$id,
314        (($INPUT->get->str('ow') == 'true') ? true : false),
315        $auth,
316        'copy'
317    );
318    unlink($path);
319    if ($tmp) io_rmdir($tmp, true);
320    if (is_array($res)) {
321        msg($res[0], $res[1]);
322        return false;
323    }
324    return $res;
325}
326
327/**
328 * Handles media file uploads
329 *
330 * @author Andreas Gohr <andi@splitbrain.org>
331 * @author Michael Klier <chi@chimeric.de>
332 *
333 * @param string     $ns    target namespace
334 * @param int        $auth  current auth check result
335 * @param bool|array $file  $_FILES member, $_FILES['upload'] if false
336 * @return false|string false on error, id of the new file on success
337 */
338function media_upload($ns,$auth,$file=false){
339    if(!checkSecurityToken()) return false;
340    global $lang;
341    global $INPUT;
342
343    // get file and id
344    $id   = $INPUT->post->str('mediaid');
345    if (!$file) $file = $_FILES['upload'];
346    if(empty($id)) $id = $file['name'];
347
348    // check for errors (messages are done in lib/exe/mediamanager.php)
349    if($file['error']) return false;
350
351    // check extensions
352    list($fext,$fmime) = mimetype($file['name']);
353    list($iext,$imime) = mimetype($id);
354    if($fext && !$iext){
355        // no extension specified in id - read original one
356        $id   .= '.'.$fext;
357        $imime = $fmime;
358    }elseif($fext && $fext != $iext){
359        // extension was changed, print warning
360        msg(sprintf($lang['mediaextchange'],$fext,$iext));
361    }
362
363    $res = media_save(array('name' => $file['tmp_name'],
364                            'mime' => $imime,
365                            'ext'  => $iext), $ns.':'.$id,
366                      $INPUT->post->bool('ow'), $auth, 'copy_uploaded_file');
367    if (is_array($res)) {
368        msg($res[0], $res[1]);
369        return false;
370    }
371    return $res;
372}
373
374/**
375 * An alternative to move_uploaded_file that copies
376 *
377 * Using copy, makes sure any setgid bits on the media directory are honored
378 *
379 * @see   move_uploaded_file()
380 *
381 * @param string $from
382 * @param string $to
383 * @return bool
384 */
385function copy_uploaded_file($from, $to){
386    if(!is_uploaded_file($from)) return false;
387    $ok = copy($from, $to);
388    @unlink($from);
389    return $ok;
390}
391
392/**
393 * This generates an action event and delegates to _media_upload_action().
394 * Action plugins are allowed to pre/postprocess the uploaded file.
395 * (The triggered event is preventable.)
396 *
397 * Event data:
398 * $data[0]     fn_tmp:    the temporary file name (read from $_FILES)
399 * $data[1]     fn:        the file name of the uploaded file
400 * $data[2]     id:        the future directory id of the uploaded file
401 * $data[3]     imime:     the mimetype of the uploaded file
402 * $data[4]     overwrite: if an existing file is going to be overwritten
403 * $data[5]     move:      name of function that performs move/copy/..
404 *
405 * @triggers MEDIA_UPLOAD_FINISH
406 *
407 * @param array  $file
408 * @param string $id   media id
409 * @param bool   $ow   overwrite?
410 * @param int    $auth permission level
411 * @param string $move name of functions that performs move/copy/..
412 * @return false|array|string
413 */
414function media_save($file, $id, $ow, $auth, $move) {
415    if($auth < AUTH_UPLOAD) {
416        return array("You don't have permissions to upload files.", -1);
417    }
418
419    if (!isset($file['mime']) || !isset($file['ext'])) {
420        list($ext, $mime) = mimetype($id);
421        if (!isset($file['mime'])) {
422            $file['mime'] = $mime;
423        }
424        if (!isset($file['ext'])) {
425            $file['ext'] = $ext;
426        }
427    }
428
429    global $lang, $conf;
430
431    // get filename
432    $id   = cleanID($id);
433    $fn   = mediaFN($id);
434
435    // get filetype regexp
436    $types = array_keys(getMimeTypes());
437    $types = array_map(
438        function ($q) {
439            return preg_quote($q, "/");
440        },
441        $types
442    );
443    $regex = join('|',$types);
444
445    // because a temp file was created already
446    if(!preg_match('/\.('.$regex.')$/i',$fn)) {
447        return array($lang['uploadwrong'],-1);
448    }
449
450    //check for overwrite
451    $overwrite = file_exists($fn);
452    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
453    if($overwrite && (!$ow || $auth < $auth_ow)) {
454        return array($lang['uploadexist'], 0);
455    }
456    // check for valid content
457    $ok = media_contentcheck($file['name'], $file['mime']);
458    if($ok == -1){
459        return array(sprintf($lang['uploadbadcontent'],'.' . $file['ext']),-1);
460    }elseif($ok == -2){
461        return array($lang['uploadspam'],-1);
462    }elseif($ok == -3){
463        return array($lang['uploadxss'],-1);
464    }
465
466    // prepare event data
467    $data = array();
468    $data[0] = $file['name'];
469    $data[1] = $fn;
470    $data[2] = $id;
471    $data[3] = $file['mime'];
472    $data[4] = $overwrite;
473    $data[5] = $move;
474
475    // trigger event
476    return Event::createAndTrigger('MEDIA_UPLOAD_FINISH', $data, '_media_upload_action', true);
477}
478
479/**
480 * Callback adapter for media_upload_finish() triggered by MEDIA_UPLOAD_FINISH
481 *
482 * @author Michael Klier <chi@chimeric.de>
483 *
484 * @param array $data event data
485 * @return false|array|string
486 */
487function _media_upload_action($data) {
488    // fixme do further sanity tests of given data?
489    if(is_array($data) && count($data)===6) {
490        return media_upload_finish($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
491    } else {
492        return false; //callback error
493    }
494}
495
496/**
497 * Saves an uploaded media file
498 *
499 * @author Andreas Gohr <andi@splitbrain.org>
500 * @author Michael Klier <chi@chimeric.de>
501 * @author Kate Arzamastseva <pshns@ukr.net>
502 *
503 * @param string $fn_tmp
504 * @param string $fn
505 * @param string $id        media id
506 * @param string $imime     mime type
507 * @param bool   $overwrite overwrite existing?
508 * @param string $move      function name
509 * @return array|string
510 */
511function media_upload_finish($fn_tmp, $fn, $id, $imime, $overwrite, $move = 'move_uploaded_file') {
512    global $conf;
513    global $lang;
514    global $REV;
515
516    $old = @filemtime($fn);
517    if(!file_exists(mediaFN($id, $old)) && file_exists($fn)) {
518        // add old revision to the attic if missing
519        media_saveOldRevision($id);
520    }
521
522    // prepare directory
523    io_createNamespace($id, 'media');
524
525    $filesize_old = file_exists($fn) ? filesize($fn) : 0;
526
527    if($move($fn_tmp, $fn)) {
528        @clearstatcache(true,$fn);
529        $new = @filemtime($fn);
530        // Set the correct permission here.
531        // Always chmod media because they may be saved with different permissions than expected from the php umask.
532        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
533        chmod($fn, $conf['fmode']);
534        msg($lang['uploadsucc'],1);
535        media_notify($id,$fn,$imime,$old,$new);
536        // add a log entry to the media changelog
537        $filesize_new = filesize($fn);
538        $sizechange = $filesize_new - $filesize_old;
539        if($REV) {
540            addMediaLogEntry(
541                $new,
542                $id,
543                DOKU_CHANGE_TYPE_REVERT,
544                sprintf($lang['restored'], dformat($REV)),
545                $REV,
546                null,
547                $sizechange
548            );
549        } elseif($overwrite) {
550            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT, '', '', null, $sizechange);
551        } else {
552            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created'], '', null, $sizechange);
553        }
554        return $id;
555    }else{
556        return array($lang['uploadfail'],-1);
557    }
558}
559
560/**
561 * Moves the current version of media file to the media_attic
562 * directory
563 *
564 * @author Kate Arzamastseva <pshns@ukr.net>
565 *
566 * @param string $id
567 * @return int - revision date
568 */
569function media_saveOldRevision($id){
570    global $conf, $lang;
571
572    $oldf = mediaFN($id);
573    if(!file_exists($oldf)) return '';
574    $date = filemtime($oldf);
575    if (!$conf['mediarevisions']) return $date;
576
577    $medialog = new MediaChangeLog($id);
578    if (!$medialog->getRevisionInfo($date)) {
579        // there was an external edit,
580        // there is no log entry for current version of file
581        $sizechange = filesize($oldf);
582        if(!file_exists(mediaMetaFN($id, '.changes'))) {
583            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created'], '', null, $sizechange);
584        } else {
585            $oldRev = $medialog->getRevisions(-1, 1); // from changelog
586            $oldRev = (int) (empty($oldRev) ? 0 : $oldRev[0]);
587            $filesize_old = filesize(mediaFN($id, $oldRev));
588            $sizechange = $sizechange - $filesize_old;
589
590            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_EDIT, '', '', null, $sizechange);
591        }
592    }
593
594    $newf = mediaFN($id,$date);
595    io_makeFileDir($newf);
596    if(copy($oldf, $newf)) {
597        // Set the correct permission here.
598        // Always chmod media because they may be saved with different permissions than expected from the php umask.
599        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
600        chmod($newf, $conf['fmode']);
601    }
602    return $date;
603}
604
605/**
606 * This function checks if the uploaded content is really what the
607 * mimetype says it is. We also do spam checking for text types here.
608 *
609 * We need to do this stuff because we can not rely on the browser
610 * to do this check correctly. Yes, IE is broken as usual.
611 *
612 * @author Andreas Gohr <andi@splitbrain.org>
613 * @link   http://www.splitbrain.org/blog/2007-02/12-internet_explorer_facilitates_cross_site_scripting
614 * @fixme  check all 26 magic IE filetypes here?
615 *
616 * @param string $file path to file
617 * @param string $mime mimetype
618 * @return int
619 */
620function media_contentcheck($file,$mime){
621    global $conf;
622    if($conf['iexssprotect']){
623        $fh = @fopen($file, 'rb');
624        if($fh){
625            $bytes = fread($fh, 256);
626            fclose($fh);
627            if(preg_match('/<(script|a|img|html|body|iframe)[\s>]/i',$bytes)){
628                return -3; //XSS: possibly malicious content
629            }
630        }
631    }
632    if(substr($mime,0,6) == 'image/'){
633        $info = @getimagesize($file);
634        if($mime == 'image/gif' && $info[2] != 1){
635            return -1; // uploaded content did not match the file extension
636        }elseif($mime == 'image/jpeg' && $info[2] != 2){
637            return -1;
638        }elseif($mime == 'image/png' && $info[2] != 3){
639            return -1;
640        }
641        # fixme maybe check other images types as well
642    }elseif(substr($mime,0,5) == 'text/'){
643        global $TEXT;
644        $TEXT = io_readFile($file);
645        if(checkwordblock()){
646            return -2; //blocked by the spam blacklist
647        }
648    }
649    return 0;
650}
651
652/**
653 * Send a notify mail on uploads
654 *
655 * @author Andreas Gohr <andi@splitbrain.org>
656 *
657 * @param string   $id      media id
658 * @param string   $file    path to file
659 * @param string   $mime    mime type
660 * @param bool|int $old_rev revision timestamp or false
661 * @return bool
662 */
663function media_notify($id,$file,$mime,$old_rev=false,$current_rev=false){
664    global $conf;
665    if(empty($conf['notify'])) return false; //notify enabled?
666
667    $subscription = new MediaSubscriptionSender();
668    return $subscription->sendMediaDiff($conf['notify'], 'uploadmail', $id, $old_rev, $current_rev);
669}
670
671/**
672 * List all files in a given Media namespace
673 *
674 * @param string      $ns             namespace
675 * @param null|int    $auth           permission level
676 * @param string      $jump           id
677 * @param bool        $fullscreenview
678 * @param bool|string $sort           sorting order, false skips sorting
679 */
680function media_filelist($ns,$auth=null,$jump='',$fullscreenview=false,$sort=false){
681    global $conf;
682    global $lang;
683    $ns = cleanID($ns);
684
685    // check auth our self if not given (needed for ajax calls)
686    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
687
688    if (!$fullscreenview) echo '<h1 id="media__ns">:'.hsc($ns).'</h1>'.NL;
689
690    if($auth < AUTH_READ){
691        // FIXME: print permission warning here instead?
692        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
693    }else{
694        if (!$fullscreenview) {
695            media_uploadform($ns, $auth);
696            media_searchform($ns);
697        }
698
699        $dir = utf8_encodeFN(str_replace(':','/',$ns));
700        $data = array();
701        search($data,$conf['mediadir'],'search_media',
702                array('showmsg'=>true,'depth'=>1),$dir,1,$sort);
703
704        if(!count($data)){
705            echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
706        }else {
707            if ($fullscreenview) {
708                echo '<ul class="' . _media_get_list_type() . '">';
709            }
710            foreach($data as $item){
711                if (!$fullscreenview) {
712                    media_printfile($item,$auth,$jump);
713                } else {
714                    media_printfile_thumbs($item,$auth,$jump);
715                }
716            }
717            if ($fullscreenview) echo '</ul>'.NL;
718        }
719    }
720}
721
722/**
723 * Prints tabs for files list actions
724 *
725 * @author Kate Arzamastseva <pshns@ukr.net>
726 * @author Adrian Lang <mail@adrianlang.de>
727 *
728 * @param string $selected_tab - opened tab
729 */
730
731function media_tabs_files($selected_tab = ''){
732    global $lang;
733    $tabs = array();
734    foreach(array('files'  => 'mediaselect',
735                  'upload' => 'media_uploadtab',
736                  'search' => 'media_searchtab') as $tab => $caption) {
737        $tabs[$tab] = array('href'    => media_managerURL(['tab_files' => $tab], '&'),
738                            'caption' => $lang[$caption]);
739    }
740
741    html_tabs($tabs, $selected_tab);
742}
743
744/**
745 * Prints tabs for files details actions
746 *
747 * @author Kate Arzamastseva <pshns@ukr.net>
748 * @param string $image filename of the current image
749 * @param string $selected_tab opened tab
750 */
751function media_tabs_details($image, $selected_tab = '') {
752    global $lang, $conf;
753
754    $tabs = array();
755    $tabs['view'] = array('href'    => media_managerURL(['tab_details' => 'view'], '&'),
756                          'caption' => $lang['media_viewtab']);
757
758    list(, $mime) = mimetype($image);
759    if ($mime == 'image/jpeg' && file_exists(mediaFN($image))) {
760        $tabs['edit'] = array('href'    => media_managerURL(['tab_details' => 'edit'], '&'),
761                              'caption' => $lang['media_edittab']);
762    }
763    if ($conf['mediarevisions']) {
764        $tabs['history'] = array('href'    => media_managerURL(['tab_details' => 'history'], '&'),
765                                 'caption' => $lang['media_historytab']);
766    }
767
768    html_tabs($tabs, $selected_tab);
769}
770
771/**
772 * Prints options for the tab that displays a list of all files
773 *
774 * @author Kate Arzamastseva <pshns@ukr.net>
775 */
776function media_tab_files_options() {
777    global $lang;
778    global $INPUT;
779    global $ID;
780
781    $form = new Form([
782            'method' => 'get',
783            'action' => wl($ID),
784            'class' => 'options'
785    ]);
786    $form->addTagOpen('div')->addClass('no');
787    $form->setHiddenField('sectok', null);
788    $media_manager_params = media_managerURL([], '', false, true);
789    foreach ($media_manager_params as $pKey => $pVal) {
790        $form->setHiddenField($pKey, $pVal);
791    }
792    if ($INPUT->has('q')) {
793        $form->setHiddenField('q', $INPUT->str('q'));
794    }
795    $form->addHTML('<ul>'.NL);
796    foreach (array('list' => array('listType', array('thumbs', 'rows')),
797                  'sort' => array('sortBy', array('name', 'date')))
798            as $group => $content) {
799        $checked = "_media_get_${group}_type";
800        $checked = $checked();
801
802        $form->addHTML('<li class="'. $content[0] .'">');
803        foreach ($content[1] as $option) {
804            $attrs = array();
805            if ($checked == $option) {
806                $attrs['checked'] = 'checked';
807            }
808            $radio = $form->addRadioButton(
809                $group.'_dwmedia',
810                $lang['media_'.$group.'_'.$option]
811            )->val($option)->id($content[0].'__'.$option)->addClass($option);
812            $radio->attrs($attrs);
813        }
814        $form->addHTML('</li>'.NL);
815    }
816    $form->addHTML('<li>');
817    $form->addButton('', $lang['btn_apply'])->attr('type', 'submit');
818    $form->addHTML('</li>'.NL);
819    $form->addHTML('</ul>'.NL);
820    $form->addTagClose('div');
821    print $form->toHTML();
822}
823
824/**
825 * Returns type of sorting for the list of files in media manager
826 *
827 * @author Kate Arzamastseva <pshns@ukr.net>
828 *
829 * @return string - sort type
830 */
831function _media_get_sort_type() {
832    return _media_get_display_param('sort', array('default' => 'name', 'date'));
833}
834
835/**
836 * Returns type of listing for the list of files in media manager
837 *
838 * @author Kate Arzamastseva <pshns@ukr.net>
839 *
840 * @return string - list type
841 */
842function _media_get_list_type() {
843    return _media_get_display_param('list', array('default' => 'thumbs', 'rows'));
844}
845
846/**
847 * Get display parameters
848 *
849 * @param string $param   name of parameter
850 * @param array  $values  allowed values, where default value has index key 'default'
851 * @return string the parameter value
852 */
853function _media_get_display_param($param, $values) {
854    global $INPUT;
855    if (in_array($INPUT->str($param), $values)) {
856        // FIXME: Set cookie
857        return $INPUT->str($param);
858    } else {
859        $val = get_doku_pref($param, $values['default']);
860        if (!in_array($val, $values)) {
861            $val = $values['default'];
862        }
863        return $val;
864    }
865}
866
867/**
868 * Prints tab that displays a list of all files
869 *
870 * @author Kate Arzamastseva <pshns@ukr.net>
871 *
872 * @param string    $ns
873 * @param null|int  $auth permission level
874 * @param string    $jump item id
875 */
876function media_tab_files($ns,$auth=null,$jump='') {
877    global $lang;
878    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
879
880    if($auth < AUTH_READ){
881        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
882    }else{
883        media_filelist($ns,$auth,$jump,true,_media_get_sort_type());
884    }
885}
886
887/**
888 * Prints tab that displays uploading form
889 *
890 * @author Kate Arzamastseva <pshns@ukr.net>
891 *
892 * @param string   $ns
893 * @param null|int $auth permission level
894 * @param string   $jump item id
895 */
896function media_tab_upload($ns,$auth=null,$jump='') {
897    global $lang;
898    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
899
900    echo '<div class="upload">'.NL;
901    if ($auth >= AUTH_UPLOAD) {
902        echo '<p>' . $lang['mediaupload'] . '</p>';
903    }
904    media_uploadform($ns, $auth, true);
905    echo '</div>'.NL;
906}
907
908/**
909 * Prints tab that displays search form
910 *
911 * @author Kate Arzamastseva <pshns@ukr.net>
912 *
913 * @param string $ns
914 * @param null|int $auth permission level
915 */
916function media_tab_search($ns,$auth=null) {
917    global $INPUT;
918
919    $do = $INPUT->str('mediado');
920    $query = $INPUT->str('q');
921    echo '<div class="search">'.NL;
922
923    media_searchform($ns, $query, true);
924    if ($do == 'searchlist' || $query) {
925        media_searchlist($query,$ns,$auth,true,_media_get_sort_type());
926    }
927    echo '</div>'.NL;
928}
929
930/**
931 * Prints tab that displays mediafile details
932 *
933 * @author Kate Arzamastseva <pshns@ukr.net>
934 *
935 * @param string     $image media id
936 * @param string     $ns
937 * @param null|int   $auth  permission level
938 * @param string|int $rev   revision timestamp or empty string
939 */
940function media_tab_view($image, $ns, $auth=null, $rev='') {
941    global $lang;
942    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
943
944    if ($image && $auth >= AUTH_READ) {
945        $meta = new JpegMeta(mediaFN($image, $rev));
946        media_preview($image, $auth, $rev, $meta);
947        media_preview_buttons($image, $auth, $rev);
948        media_details($image, $auth, $rev, $meta);
949
950    } else {
951        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
952    }
953}
954
955/**
956 * Prints tab that displays form for editing mediafile metadata
957 *
958 * @author Kate Arzamastseva <pshns@ukr.net>
959 *
960 * @param string     $image media id
961 * @param string     $ns
962 * @param null|int   $auth permission level
963 */
964function media_tab_edit($image, $ns, $auth=null) {
965    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
966
967    if ($image) {
968        list(, $mime) = mimetype($image);
969        if ($mime == 'image/jpeg') media_metaform($image,$auth);
970    }
971}
972
973/**
974 * Prints tab that displays mediafile revisions
975 *
976 * @author Kate Arzamastseva <pshns@ukr.net>
977 *
978 * @param string     $image media id
979 * @param string     $ns
980 * @param null|int   $auth permission level
981 */
982function media_tab_history($image, $ns, $auth=null) {
983    global $lang;
984    global $INPUT;
985
986    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
987    $do = $INPUT->str('mediado');
988
989    if ($auth >= AUTH_READ && $image) {
990        if ($do == 'diff'){
991            media_diff($image, $ns, $auth);
992        } else {
993            $first = $INPUT->int('first');
994            html_revisions($first, $image);
995        }
996    } else {
997        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
998    }
999}
1000
1001/**
1002 * Prints mediafile details
1003 *
1004 * @param string         $image media id
1005 * @param int            $auth permission level
1006 * @param int|string     $rev revision timestamp or empty string
1007 * @param JpegMeta|bool  $meta
1008 *
1009 * @author Kate Arzamastseva <pshns@ukr.net>
1010 */
1011function media_preview($image, $auth, $rev='', $meta=false) {
1012
1013    $size = media_image_preview_size($image, $rev, $meta);
1014
1015    if ($size) {
1016        global $lang;
1017        echo '<div class="image">';
1018
1019        $more = array();
1020        if ($rev) {
1021            $more['rev'] = $rev;
1022        } else {
1023            $t = @filemtime(mediaFN($image));
1024            $more['t'] = $t;
1025        }
1026
1027        $more['w'] = $size[0];
1028        $more['h'] = $size[1];
1029        $src = ml($image, $more);
1030
1031        echo '<a href="'.$src.'" target="_blank" title="'.$lang['mediaview'].'">';
1032        echo '<img src="'.$src.'" alt="" style="max-width: '.$size[0].'px;" />';
1033        echo '</a>';
1034
1035        echo '</div>'.NL;
1036    }
1037}
1038
1039/**
1040 * Prints mediafile action buttons
1041 *
1042 * @author Kate Arzamastseva <pshns@ukr.net>
1043 *
1044 * @param string     $image media id
1045 * @param int        $auth  permission level
1046 * @param string|int $rev   revision timestamp, or empty string
1047 */
1048function media_preview_buttons($image, $auth, $rev = '') {
1049    global $lang, $conf;
1050
1051    echo '<ul class="actions">'.DOKU_LF;
1052
1053    if ($auth >= AUTH_DELETE && !$rev && file_exists(mediaFN($image))) {
1054
1055        // delete button
1056        $form = new Form([
1057            'id' => 'mediamanager__btn_delete',
1058            'action' => media_managerURL(['delete' => $image], '&'),
1059        ]);
1060        $form->addTagOpen('div')->addClass('no');
1061        $form->addButton('', $lang['btn_delete'])->attr('type', 'submit');
1062        $form->addTagClose('div');
1063        echo '<li>';
1064        echo $form->toHTML();
1065        echo '</li>'.DOKU_LF;
1066    }
1067
1068    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1069    if ($auth >= $auth_ow && !$rev) {
1070
1071        // upload new version button
1072        $form = new Form([
1073            'id' => 'mediamanager__btn_update',
1074            'action' => media_managerURL(['image' => $image, 'mediado' => 'update'], '&'),
1075        ]);
1076        $form->addTagOpen('div')->addClass('no');
1077        $form->addButton('', $lang['media_update'])->attr('type', 'submit');
1078        $form->addTagClose('div');
1079        echo '<li>';
1080        echo $form->toHTML();
1081        echo '</li>'.DOKU_LF;
1082    }
1083
1084    if ($auth >= AUTH_UPLOAD && $rev && $conf['mediarevisions'] && file_exists(mediaFN($image, $rev))) {
1085
1086        // restore button
1087        $form = new Form([
1088            'id' => 'mediamanager__btn_restore',
1089            'action'=>media_managerURL(['image' => $image], '&'),
1090        ]);
1091        $form->addTagOpen('div')->addClass('no');
1092        $form->setHiddenField('mediado', 'restore');
1093        $form->setHiddenField('rev', $rev);
1094        $form->addButton('', $lang['media_restore'])->attr('type', 'submit');
1095        $form->addTagClose('div');
1096        echo '<li>';
1097        echo $form->toHTML();
1098        echo '</li>'.DOKU_LF;
1099    }
1100
1101    echo '</ul>'.DOKU_LF;
1102}
1103
1104/**
1105 * Returns image width and height for mediamanager preview panel
1106 *
1107 * @author Kate Arzamastseva <pshns@ukr.net>
1108 * @param string         $image
1109 * @param int|string     $rev
1110 * @param JpegMeta|bool  $meta
1111 * @param int            $size
1112 * @return array|false
1113 */
1114function media_image_preview_size($image, $rev, $meta, $size = 500) {
1115    if (!preg_match("/\.(jpe?g|gif|png)$/", $image) || !file_exists(mediaFN($image, $rev))) return false;
1116
1117    $info = getimagesize(mediaFN($image, $rev));
1118    $w = (int) $info[0];
1119    $h = (int) $info[1];
1120
1121    if($meta && ($w > $size || $h > $size)){
1122        $ratio = $meta->getResizeRatio($size, $size);
1123        $w = floor($w * $ratio);
1124        $h = floor($h * $ratio);
1125    }
1126    return array($w, $h);
1127}
1128
1129/**
1130 * Returns the requested EXIF/IPTC tag from the image meta
1131 *
1132 * @author Kate Arzamastseva <pshns@ukr.net>
1133 *
1134 * @param array    $tags array with tags, first existing is returned
1135 * @param JpegMeta $meta
1136 * @param string   $alt  alternative value
1137 * @return string
1138 */
1139function media_getTag($tags,$meta,$alt=''){
1140    if($meta === false) return $alt;
1141    $info = $meta->getField($tags);
1142    if($info == false) return $alt;
1143    return $info;
1144}
1145
1146/**
1147 * Returns mediafile tags
1148 *
1149 * @author Kate Arzamastseva <pshns@ukr.net>
1150 *
1151 * @param JpegMeta $meta
1152 * @return array list of tags of the mediafile
1153 */
1154function media_file_tags($meta) {
1155    // load the field descriptions
1156    static $fields = null;
1157    if(is_null($fields)){
1158        $config_files = getConfigFiles('mediameta');
1159        foreach ($config_files as $config_file) {
1160            if(file_exists($config_file)) include($config_file);
1161        }
1162    }
1163
1164    $tags = array();
1165
1166    foreach($fields as $key => $tag){
1167        $t = array();
1168        if (!empty($tag[0])) $t = array($tag[0]);
1169        if(isset($tag[3]) && is_array($tag[3])) $t = array_merge($t,$tag[3]);
1170        $value = media_getTag($t, $meta);
1171        $tags[] = array('tag' => $tag, 'value' => $value);
1172    }
1173
1174    return $tags;
1175}
1176
1177/**
1178 * Prints mediafile tags
1179 *
1180 * @author Kate Arzamastseva <pshns@ukr.net>
1181 *
1182 * @param string        $image image id
1183 * @param int           $auth  permission level
1184 * @param string|int    $rev   revision timestamp, or empty string
1185 * @param bool|JpegMeta $meta  image object, or create one if false
1186 */
1187function media_details($image, $auth, $rev='', $meta=false) {
1188    global $lang;
1189
1190    if (!$meta) $meta = new JpegMeta(mediaFN($image, $rev));
1191    $tags = media_file_tags($meta);
1192
1193    echo '<dl>'.NL;
1194    foreach($tags as $tag){
1195        if ($tag['value']) {
1196            $value = cleanText($tag['value']);
1197            echo '<dt>'.$lang[$tag['tag'][1]].'</dt><dd>';
1198            if ($tag['tag'][2] == 'date') echo dformat($value);
1199            else echo hsc($value);
1200            echo '</dd>'.NL;
1201        }
1202    }
1203    echo '</dl>'.NL;
1204    echo '<dl>'.NL;
1205    echo '<dt>'.$lang['reference'].':</dt>';
1206    $media_usage = ft_mediause($image,true);
1207    if(count($media_usage) > 0){
1208        foreach($media_usage as $path){
1209            echo '<dd>'.html_wikilink($path).'</dd>';
1210        }
1211    }else{
1212        echo '<dd>'.$lang['nothingfound'].'</dd>';
1213    }
1214    echo '</dl>'.NL;
1215
1216}
1217
1218/**
1219 * Shows difference between two revisions of file
1220 *
1221 * @author Kate Arzamastseva <pshns@ukr.net>
1222 *
1223 * @param string $image  image id
1224 * @param string $ns
1225 * @param int $auth permission level
1226 * @param bool $fromajax
1227 * @return false|null|string
1228 */
1229function media_diff($image, $ns, $auth, $fromajax = false) {
1230    global $conf;
1231    global $INPUT;
1232
1233    if ($auth < AUTH_READ || !$image || !$conf['mediarevisions']) return '';
1234
1235    $rev1 = $INPUT->int('rev');
1236
1237    $rev2 = $INPUT->ref('rev2');
1238    if(is_array($rev2)){
1239        $rev1 = (int) $rev2[0];
1240        $rev2 = (int) $rev2[1];
1241
1242        if(!$rev1){
1243            $rev1 = $rev2;
1244            unset($rev2);
1245        }
1246    }else{
1247        $rev2 = $INPUT->int('rev2');
1248    }
1249
1250    if ($rev1 && !file_exists(mediaFN($image, $rev1))) $rev1 = false;
1251    if ($rev2 && !file_exists(mediaFN($image, $rev2))) $rev2 = false;
1252
1253    if($rev1 && $rev2){            // two specific revisions wanted
1254        // make sure order is correct (older on the left)
1255        if($rev1 < $rev2){
1256            $l_rev = $rev1;
1257            $r_rev = $rev2;
1258        }else{
1259            $l_rev = $rev2;
1260            $r_rev = $rev1;
1261        }
1262    }elseif($rev1){                // single revision given, compare to current
1263        $r_rev = '';
1264        $l_rev = $rev1;
1265    }else{                        // no revision was given, compare previous to current
1266        $r_rev = '';
1267        $medialog = new MediaChangeLog($image);
1268        $revs = $medialog->getRevisions(0, 1);
1269        if (file_exists(mediaFN($image, $revs[0]))) {
1270            $l_rev = $revs[0];
1271        } else {
1272            $l_rev = '';
1273        }
1274    }
1275
1276    // prepare event data
1277    $data = array();
1278    $data[0] = $image;
1279    $data[1] = $l_rev;
1280    $data[2] = $r_rev;
1281    $data[3] = $ns;
1282    $data[4] = $auth;
1283    $data[5] = $fromajax;
1284
1285    // trigger event
1286    return Event::createAndTrigger('MEDIA_DIFF', $data, '_media_file_diff', true);
1287}
1288
1289/**
1290 * Callback for media file diff
1291 *
1292 * @param array $data event data
1293 * @return false|null
1294 */
1295function _media_file_diff($data) {
1296    if(is_array($data) && count($data)===6) {
1297        media_file_diff($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
1298    } else {
1299        return false;
1300    }
1301}
1302
1303/**
1304 * Shows difference between two revisions of image
1305 *
1306 * @author Kate Arzamastseva <pshns@ukr.net>
1307 *
1308 * @param string $image
1309 * @param string|int $l_rev revision timestamp, or empty string
1310 * @param string|int $r_rev revision timestamp, or empty string
1311 * @param string $ns
1312 * @param int $auth permission level
1313 * @param bool $fromajax
1314 */
1315function media_file_diff($image, $l_rev, $r_rev, $ns, $auth, $fromajax) {
1316    global $lang;
1317    global $INPUT;
1318
1319    $l_meta = new JpegMeta(mediaFN($image, $l_rev));
1320    $r_meta = new JpegMeta(mediaFN($image, $r_rev));
1321
1322    $is_img = preg_match('/\.(jpe?g|gif|png)$/', $image);
1323    if ($is_img) {
1324        $l_size = media_image_preview_size($image, $l_rev, $l_meta);
1325        $r_size = media_image_preview_size($image, $r_rev, $r_meta);
1326        $is_img = ($l_size && $r_size && ($l_size[0] >= 30 || $r_size[0] >= 30));
1327
1328        $difftype = $INPUT->str('difftype');
1329
1330        if (!$fromajax) {
1331            $form = new Form([
1332                'id' => 'mediamanager__form_diffview',
1333                'action' => media_managerURL([], '&'),
1334                'method' => 'get',
1335                'class' => 'diffView',
1336            ]);
1337            $form->addTagOpen('div')->addClass('no');
1338            $form->setHiddenField('sectok', null);
1339            $form->setHiddenField('mediado', 'diff');
1340            $form->setHiddenField('rev2[0]', $l_rev);
1341            $form->setHiddenField('rev2[1]', $r_rev);
1342            echo $form->toHTML();
1343
1344            echo NL.'<div id="mediamanager__diff" >'.NL;
1345        }
1346
1347        if ($difftype == 'opacity' || $difftype == 'portions') {
1348            media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $difftype);
1349            if (!$fromajax) echo '</div>';
1350            return;
1351        }
1352    }
1353
1354    list($l_head, $r_head) = (new dokuwiki\Ui\Diff)->diffHead($l_rev, $r_rev, $image, true);
1355
1356    ?>
1357    <div class="table">
1358    <table>
1359      <tr>
1360        <th><?php echo $l_head; ?></th>
1361        <th><?php echo $r_head; ?></th>
1362      </tr>
1363    <?php
1364
1365    echo '<tr class="image">';
1366    echo '<td>';
1367    media_preview($image, $auth, $l_rev, $l_meta);
1368    echo '</td>';
1369
1370    echo '<td>';
1371    media_preview($image, $auth, $r_rev, $r_meta);
1372    echo '</td>';
1373    echo '</tr>'.NL;
1374
1375    echo '<tr class="actions">';
1376    echo '<td>';
1377    media_preview_buttons($image, $auth, $l_rev);
1378    echo '</td>';
1379
1380    echo '<td>';
1381    media_preview_buttons($image, $auth, $r_rev);
1382    echo '</td>';
1383    echo '</tr>'.NL;
1384
1385    $l_tags = media_file_tags($l_meta);
1386    $r_tags = media_file_tags($r_meta);
1387    // FIXME r_tags-only stuff
1388    foreach ($l_tags as $key => $l_tag) {
1389        if ($l_tag['value'] != $r_tags[$key]['value']) {
1390            $r_tags[$key]['highlighted'] = true;
1391            $l_tags[$key]['highlighted'] = true;
1392        } else if (!$l_tag['value'] || !$r_tags[$key]['value']) {
1393            unset($r_tags[$key]);
1394            unset($l_tags[$key]);
1395        }
1396    }
1397
1398    echo '<tr>';
1399    foreach(array($l_tags,$r_tags) as $tags){
1400        echo '<td>'.NL;
1401
1402        echo '<dl class="img_tags">';
1403        foreach($tags as $tag){
1404            $value = cleanText($tag['value']);
1405            if (!$value) $value = '-';
1406            echo '<dt>'.$lang[$tag['tag'][1]].'</dt>';
1407            echo '<dd>';
1408            if ($tag['highlighted']) {
1409                echo '<strong>';
1410            }
1411            if ($tag['tag'][2] == 'date') echo dformat($value);
1412            else echo hsc($value);
1413            if ($tag['highlighted']) {
1414                echo '</strong>';
1415            }
1416            echo '</dd>';
1417        }
1418        echo '</dl>'.NL;
1419
1420        echo '</td>';
1421    }
1422    echo '</tr>'.NL;
1423
1424    echo '</table>'.NL;
1425    echo '</div>'.NL;
1426
1427    if ($is_img && !$fromajax) echo '</div>';
1428}
1429
1430/**
1431 * Prints two images side by side
1432 * and slider
1433 *
1434 * @author Kate Arzamastseva <pshns@ukr.net>
1435 *
1436 * @param string $image   image id
1437 * @param int    $l_rev   revision timestamp, or empty string
1438 * @param int    $r_rev   revision timestamp, or empty string
1439 * @param array  $l_size  array with width and height
1440 * @param array  $r_size  array with width and height
1441 * @param string $type
1442 */
1443function media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $type) {
1444    if ($l_size != $r_size) {
1445        if ($r_size[0] > $l_size[0]) {
1446            $l_size = $r_size;
1447        }
1448    }
1449
1450    $l_more = array('rev' => $l_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1451    $r_more = array('rev' => $r_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1452
1453    $l_src = ml($image, $l_more);
1454    $r_src = ml($image, $r_more);
1455
1456    // slider
1457    echo '<div class="slider" style="max-width: '.($l_size[0]-20).'px;" ></div>'.NL;
1458
1459    // two images in divs
1460    echo '<div class="imageDiff ' . $type . '">'.NL;
1461    echo '<div class="image1" style="max-width: '.$l_size[0].'px;">';
1462    echo '<img src="'.$l_src.'" alt="" />';
1463    echo '</div>'.NL;
1464    echo '<div class="image2" style="max-width: '.$l_size[0].'px;">';
1465    echo '<img src="'.$r_src.'" alt="" />';
1466    echo '</div>'.NL;
1467    echo '</div>'.NL;
1468}
1469
1470/**
1471 * Restores an old revision of a media file
1472 *
1473 * @param string $image media id
1474 * @param int    $rev   revision timestamp or empty string
1475 * @param int    $auth
1476 * @return string - file's id
1477 *
1478 * @author Kate Arzamastseva <pshns@ukr.net>
1479 */
1480function media_restore($image, $rev, $auth){
1481    global $conf;
1482    if ($auth < AUTH_UPLOAD || !$conf['mediarevisions']) return false;
1483    $removed = (!file_exists(mediaFN($image)) && file_exists(mediaMetaFN($image, '.changes')));
1484    if (!$image || (!file_exists(mediaFN($image)) && !$removed)) return false;
1485    if (!$rev || !file_exists(mediaFN($image, $rev))) return false;
1486    list(,$imime,) = mimetype($image);
1487    $res = media_upload_finish(mediaFN($image, $rev),
1488        mediaFN($image),
1489        $image,
1490        $imime,
1491        true,
1492        'copy');
1493    if (is_array($res)) {
1494        msg($res[0], $res[1]);
1495        return false;
1496    }
1497    return $res;
1498}
1499
1500/**
1501 * List all files found by the search request
1502 *
1503 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1504 * @author Andreas Gohr <gohr@cosmocode.de>
1505 * @author Kate Arzamastseva <pshns@ukr.net>
1506 * @triggers MEDIA_SEARCH
1507 *
1508 * @param string $query
1509 * @param string $ns
1510 * @param null|int $auth
1511 * @param bool $fullscreen
1512 * @param string $sort
1513 */
1514function media_searchlist($query,$ns,$auth=null,$fullscreen=false,$sort='natural'){
1515    global $conf;
1516    global $lang;
1517
1518    $ns = cleanID($ns);
1519    $evdata = array(
1520        'ns'    => $ns,
1521        'data'  => array(),
1522        'query' => $query
1523    );
1524    if (!blank($query)) {
1525        $evt = new Event('MEDIA_SEARCH', $evdata);
1526        if ($evt->advise_before()) {
1527            $dir = utf8_encodeFN(str_replace(':','/',$evdata['ns']));
1528            $quoted = preg_quote($evdata['query'],'/');
1529            //apply globbing
1530            $quoted = str_replace(array('\*', '\?'), array('.*', '.'), $quoted, $count);
1531
1532            //if we use globbing file name must match entirely but may be preceded by arbitrary namespace
1533            if ($count > 0) $quoted = '^([^:]*:)*'.$quoted.'$';
1534
1535            $pattern = '/'.$quoted.'/i';
1536            search($evdata['data'],
1537                    $conf['mediadir'],
1538                    'search_media',
1539                    array('showmsg'=>false,'pattern'=>$pattern),
1540                    $dir,
1541                    1,
1542                    $sort);
1543        }
1544        $evt->advise_after();
1545        unset($evt);
1546    }
1547
1548    if (!$fullscreen) {
1549        echo '<h1 id="media__ns">'.sprintf($lang['searchmedia_in'],hsc($ns).':*').'</h1>'.NL;
1550        media_searchform($ns,$query);
1551    }
1552
1553    if(!count($evdata['data'])){
1554        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
1555    }else {
1556        if ($fullscreen) {
1557            echo '<ul class="' . _media_get_list_type() . '">';
1558        }
1559        foreach($evdata['data'] as $item){
1560            if (!$fullscreen) media_printfile($item,$item['perm'],'',true);
1561            else media_printfile_thumbs($item,$item['perm'],false,true);
1562        }
1563        if ($fullscreen) echo '</ul>'.NL;
1564    }
1565}
1566
1567/**
1568 * Formats and prints one file in the list
1569 *
1570 * @param array     $item
1571 * @param int       $auth              permission level
1572 * @param string    $jump              item id
1573 * @param bool      $display_namespace
1574 */
1575function media_printfile($item,$auth,$jump,$display_namespace=false){
1576    global $lang;
1577
1578    // Prepare zebra coloring
1579    // I always wanted to use this variable name :-D
1580    static $twibble = 1;
1581    $twibble *= -1;
1582    $zebra = ($twibble == -1) ? 'odd' : 'even';
1583
1584    // Automatically jump to recent action
1585    if($jump == $item['id']) {
1586        $jump = ' id="scroll__here" ';
1587    }else{
1588        $jump = '';
1589    }
1590
1591    // Prepare fileicons
1592    list($ext) = mimetype($item['file'],false);
1593    $class = preg_replace('/[^_\-a-z0-9]+/i','_',$ext);
1594    $class = 'select mediafile mf_'.$class;
1595
1596    // Prepare filename
1597    $file = utf8_decodeFN($item['file']);
1598
1599    // Prepare info
1600    $info = '';
1601    if($item['isimg']){
1602        $info .= (int) $item['meta']->getField('File.Width');
1603        $info .= '&#215;';
1604        $info .= (int) $item['meta']->getField('File.Height');
1605        $info .= ' ';
1606    }
1607    $info .= '<i>'.dformat($item['mtime']).'</i>';
1608    $info .= ' ';
1609    $info .= filesize_h($item['size']);
1610
1611    // output
1612    echo '<div class="'.$zebra.'"'.$jump.' title="'.hsc($item['id']).'">'.NL;
1613    if (!$display_namespace) {
1614        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($file).'</a> ';
1615    } else {
1616        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($item['id']).'</a><br/>';
1617    }
1618    echo '<span class="info">('.$info.')</span>'.NL;
1619
1620    // view button
1621    $link = ml($item['id'],'',true);
1622    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/magnifier.png" '.
1623        'alt="'.$lang['mediaview'].'" title="'.$lang['mediaview'].'" class="btn" /></a>';
1624
1625    // mediamanager button
1626    $link = wl('',array('do'=>'media','image'=>$item['id'],'ns'=>getNS($item['id'])));
1627    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/mediamanager.png" '.
1628        'alt="'.$lang['btn_media'].'" title="'.$lang['btn_media'].'" class="btn" /></a>';
1629
1630    // delete button
1631    if($item['writable'] && $auth >= AUTH_DELETE){
1632        $link = DOKU_BASE.'lib/exe/mediamanager.php?delete='.rawurlencode($item['id']).
1633            '&amp;sectok='.getSecurityToken();
1634        echo ' <a href="'.$link.'" class="btn_media_delete" title="'.$item['id'].'">'.
1635            '<img src="'.DOKU_BASE.'lib/images/trash.png" alt="'.$lang['btn_delete'].'" '.
1636            'title="'.$lang['btn_delete'].'" class="btn" /></a>';
1637    }
1638
1639    echo '<div class="example" id="ex_'.str_replace(':','_',$item['id']).'">';
1640    echo $lang['mediausage'].' <code>{{:'.$item['id'].'}}</code>';
1641    echo '</div>';
1642    if($item['isimg']) media_printimgdetail($item);
1643    echo '<div class="clearer"></div>'.NL;
1644    echo '</div>'.NL;
1645}
1646
1647/**
1648 * Display a media icon
1649 *
1650 * @param string $filename media id
1651 * @param string $size     the size subfolder, if not specified 16x16 is used
1652 * @return string html
1653 */
1654function media_printicon($filename, $size=''){
1655    list($ext) = mimetype(mediaFN($filename),false);
1656
1657    if (file_exists(DOKU_INC.'lib/images/fileicons/'.$size.'/'.$ext.'.png')) {
1658        $icon = DOKU_BASE.'lib/images/fileicons/'.$size.'/'.$ext.'.png';
1659    } else {
1660        $icon = DOKU_BASE.'lib/images/fileicons/'.$size.'/file.png';
1661    }
1662
1663    return '<img src="'.$icon.'" alt="'.$filename.'" class="icon" />';
1664}
1665
1666/**
1667 * Formats and prints one file in the list in the thumbnails view
1668 *
1669 * @author Kate Arzamastseva <pshns@ukr.net>
1670 *
1671 * @param array       $item
1672 * @param int         $auth              permission level
1673 * @param bool|string $jump              item id
1674 * @param bool        $display_namespace
1675 */
1676function media_printfile_thumbs($item,$auth,$jump=false,$display_namespace=false){
1677
1678    // Prepare filename
1679    $file = utf8_decodeFN($item['file']);
1680
1681    // output
1682    echo '<li><dl title="'.hsc($item['id']).'">'.NL;
1683
1684        echo '<dt>';
1685    if($item['isimg']) {
1686        media_printimgdetail($item, true);
1687
1688    } else {
1689        echo '<a id="d_:'.$item['id'].'" class="image" title="'.$item['id'].'" href="'.
1690            media_managerURL(['image' => hsc($item['id']), 'ns' => getNS($item['id']),
1691            'tab_details' => 'view']).'">';
1692        echo media_printicon($item['id'], '32x32');
1693        echo '</a>';
1694    }
1695    echo '</dt>'.NL;
1696    if (!$display_namespace) {
1697        $name = hsc($file);
1698    } else {
1699        $name = hsc($item['id']);
1700    }
1701    echo '<dd class="name"><a href="'.media_managerURL(['image' => hsc($item['id']), 'ns' => getNS($item['id']),
1702        'tab_details' => 'view']).'" id="h_:'.$item['id'].'">'.$name.'</a></dd>'.NL;
1703
1704    if($item['isimg']){
1705        $size = '';
1706        $size .= (int) $item['meta']->getField('File.Width');
1707        $size .= '&#215;';
1708        $size .= (int) $item['meta']->getField('File.Height');
1709        echo '<dd class="size">'.$size.'</dd>'.NL;
1710    } else {
1711        echo '<dd class="size">&#160;</dd>'.NL;
1712    }
1713    $date = dformat($item['mtime']);
1714    echo '<dd class="date">'.$date.'</dd>'.NL;
1715    $filesize = filesize_h($item['size']);
1716    echo '<dd class="filesize">'.$filesize.'</dd>'.NL;
1717    echo '</dl></li>'.NL;
1718}
1719
1720/**
1721 * Prints a thumbnail and metainfo
1722 *
1723 * @param array $item
1724 * @param bool  $fullscreen
1725 */
1726function media_printimgdetail($item, $fullscreen=false){
1727    // prepare thumbnail
1728    $size = $fullscreen ? 90 : 120;
1729
1730    $w = (int) $item['meta']->getField('File.Width');
1731    $h = (int) $item['meta']->getField('File.Height');
1732    if($w>$size || $h>$size){
1733        if (!$fullscreen) {
1734            $ratio = $item['meta']->getResizeRatio($size);
1735        } else {
1736            $ratio = $item['meta']->getResizeRatio($size,$size);
1737        }
1738        $w = floor($w * $ratio);
1739        $h = floor($h * $ratio);
1740    }
1741    $src = ml($item['id'],array('w'=>$w,'h'=>$h,'t'=>$item['mtime']));
1742    $p = array();
1743    if (!$fullscreen) {
1744        // In fullscreen mediamanager view, image resizing is done via CSS.
1745        $p['width']  = $w;
1746        $p['height'] = $h;
1747    }
1748    $p['alt']    = $item['id'];
1749    $att = buildAttributes($p);
1750
1751    // output
1752    if ($fullscreen) {
1753        echo '<a id="l_:'.$item['id'].'" class="image thumb" href="'.
1754            media_managerURL(['image' => hsc($item['id']), 'ns' => getNS($item['id']), 'tab_details' => 'view']).'">';
1755        echo '<img src="'.$src.'" '.$att.' />';
1756        echo '</a>';
1757    }
1758
1759    if ($fullscreen) return;
1760
1761    echo '<div class="detail">';
1762    echo '<div class="thumb">';
1763    echo '<a id="d_:'.$item['id'].'" class="select">';
1764    echo '<img src="'.$src.'" '.$att.' />';
1765    echo '</a>';
1766    echo '</div>';
1767
1768    // read EXIF/IPTC data
1769    $t = $item['meta']->getField(array('IPTC.Headline','xmp.dc:title'));
1770    $d = $item['meta']->getField(array('IPTC.Caption','EXIF.UserComment',
1771                'EXIF.TIFFImageDescription',
1772                'EXIF.TIFFUserComment'));
1773    if(\dokuwiki\Utf8\PhpString::strlen($d) > 250) $d = \dokuwiki\Utf8\PhpString::substr($d,0,250).'...';
1774    $k = $item['meta']->getField(array('IPTC.Keywords','IPTC.Category','xmp.dc:subject'));
1775
1776    // print EXIF/IPTC data
1777    if($t || $d || $k ){
1778        echo '<p>';
1779        if($t) echo '<strong>'.hsc($t).'</strong><br />';
1780        if($d) echo hsc($d).'<br />';
1781        if($t) echo '<em>'.hsc($k).'</em>';
1782        echo '</p>';
1783    }
1784    echo '</div>';
1785}
1786
1787/**
1788 * Build link based on the current, adding/rewriting parameters
1789 *
1790 * @author Kate Arzamastseva <pshns@ukr.net>
1791 *
1792 * @param array|bool $params
1793 * @param string     $amp           separator
1794 * @param bool       $abs           absolute url?
1795 * @param bool       $params_array  return the parmeters array?
1796 * @return string|array - link or link parameters
1797 */
1798function media_managerURL($params = false, $amp = '&amp;', $abs = false, $params_array = false) {
1799    global $ID;
1800    global $INPUT;
1801
1802    $gets = array('do' => 'media');
1803    $media_manager_params = array('tab_files', 'tab_details', 'image', 'ns', 'list', 'sort');
1804    foreach ($media_manager_params as $x) {
1805        if ($INPUT->has($x)) $gets[$x] = $INPUT->str($x);
1806    }
1807
1808    if ($params) {
1809        $gets = $params + $gets;
1810    }
1811    unset($gets['id']);
1812    if (isset($gets['delete'])) {
1813        unset($gets['image']);
1814        unset($gets['tab_details']);
1815    }
1816
1817    if ($params_array) return $gets;
1818
1819    return wl($ID,$gets,$abs,$amp);
1820}
1821
1822/**
1823 * Print the media upload form if permissions are correct
1824 *
1825 * @author Andreas Gohr <andi@splitbrain.org>
1826 * @author Kate Arzamastseva <pshns@ukr.net>
1827 *
1828 * @param string $ns
1829 * @param int    $auth permission level
1830 * @param bool  $fullscreen
1831 */
1832function media_uploadform($ns, $auth, $fullscreen = false) {
1833    global $lang;
1834    global $conf;
1835    global $INPUT;
1836
1837    if ($auth < AUTH_UPLOAD) {
1838        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.NL;
1839        return;
1840    }
1841    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1842
1843    $update = false;
1844    $id = '';
1845    if ($auth >= $auth_ow && $fullscreen && $INPUT->str('mediado') == 'update') {
1846        $update = true;
1847        $id = cleanID($INPUT->str('image'));
1848    }
1849
1850    // The default HTML upload form
1851    $form = new Form([
1852        'id' => 'dw__upload',
1853        'enctype' => 'multipart/form-data',
1854        'action' => ($fullscreen)
1855                    ? media_managerURL(['tab_files' => 'files', 'tab_details' => 'view'], '&')
1856                    : DOKU_BASE.'lib/exe/mediamanager.php',
1857    ]);
1858    $form->addTagOpen('div')->addClass('no');
1859    $form->setHiddenField('ns', hsc($ns));  // FIXME hsc required?
1860    $form->addTagOpen('p');
1861    $form->addTextInput('upload', $lang['txt_upload'])->id('upload__file')
1862            ->attrs(['type' => 'file']);
1863    $form->addTagClose('p');
1864    $form->addTagOpen('p');
1865    $form->addTextInput('mediaid', $lang['txt_filename'])->id('upload__name')
1866            ->val(noNS($id));
1867    $form->addButton('', $lang['btn_upload'])->attr('type', 'submit');
1868    $form->addTagClose('p');
1869    if ($auth >= $auth_ow){
1870        $form->addTagOpen('p');
1871        $attrs = array();
1872        if ($update) $attrs['checked'] = 'checked';
1873        $form->addCheckbox('ow', $lang['txt_overwrt'])->id('dw__ow')->val('1')
1874            ->addClass('check')->attrs($attrs);
1875        $form->addTagClose('p');
1876    }
1877    $form->addTagClose('div');
1878
1879    if (!$fullscreen) {
1880        echo '<div class="upload">'. $lang['mediaupload'] .'</div>'.DOKU_LF;
1881    } else {
1882        echo DOKU_LF;
1883    }
1884
1885    echo '<div id="mediamanager__uploader">'.DOKU_LF;
1886    // print form that might be modified by HTMLFORM_UPLOAD_OUTPUT event handlers
1887    echo $form->toHTML('upload');
1888    echo '</div>'.DOKU_LF;
1889
1890    echo '<p class="maxsize">';
1891    printf($lang['maxuploadsize'], filesize_h(media_getuploadsize()));
1892    echo ' <a class="allowedmime" href="#">'. $lang['allowedmime'] .'</a>';
1893    echo ' <span>'. implode(', ', array_keys(getMimeTypes())) .'</span>';
1894    echo '</p>'.DOKU_LF;
1895}
1896
1897/**
1898 * Returns the size uploaded files may have
1899 *
1900 * This uses a conservative approach using the lowest number found
1901 * in any of the limiting ini settings
1902 *
1903 * @returns int size in bytes
1904 */
1905function media_getuploadsize(){
1906    $okay = 0;
1907
1908    $post = (int) php_to_byte(@ini_get('post_max_size'));
1909    $suho = (int) php_to_byte(@ini_get('suhosin.post.max_value_length'));
1910    $upld = (int) php_to_byte(@ini_get('upload_max_filesize'));
1911
1912    if($post && ($post < $okay || $okay == 0)) $okay = $post;
1913    if($suho && ($suho < $okay || $okay == 0)) $okay = $suho;
1914    if($upld && ($upld < $okay || $okay == 0)) $okay = $upld;
1915
1916    return $okay;
1917}
1918
1919/**
1920 * Print the search field form
1921 *
1922 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1923 * @author Kate Arzamastseva <pshns@ukr.net>
1924 *
1925 * @param string $ns
1926 * @param string $query
1927 * @param bool $fullscreen
1928 */
1929function media_searchform($ns, $query = '', $fullscreen = false) {
1930    global $lang;
1931
1932    // The default HTML search form
1933    $form = new Form([
1934        'id'     => 'dw__mediasearch',
1935        'action' => ($fullscreen)
1936                    ? media_managerURL([], '&')
1937                    : DOKU_BASE.'lib/exe/mediamanager.php',
1938    ]);
1939    $form->addTagOpen('div')->addClass('no');
1940    $form->setHiddenField('ns', $ns);
1941    $form->setHiddenField($fullscreen ? 'mediado' : 'do', 'searchlist');
1942
1943    $form->addTagOpen('p');
1944    $input = $form->addTextInput('q', $lang['searchmedia'])
1945            ->attr('title', sprintf($lang['searchmedia_in'], hsc($ns) .':*'))
1946            ->val($query);
1947    $form->addButton('', $lang['btn_search'])->attr('type', 'submit');
1948    $form->addTagClose('p');
1949    $form->addTagClose('div');
1950
1951    // print form that might be modified by HTMLFORM_SEARCHMEDIA_OUTPUT event handlers
1952    print $form->toHTML('searchmedia');
1953}
1954
1955/**
1956 * Build a tree outline of available media namespaces
1957 *
1958 * @author Andreas Gohr <andi@splitbrain.org>
1959 *
1960 * @param string $ns
1961 */
1962function media_nstree($ns){
1963    global $conf;
1964    global $lang;
1965
1966    // currently selected namespace
1967    $ns  = cleanID($ns);
1968    if(empty($ns)){
1969        global $ID;
1970        $ns = (string)getNS($ID);
1971    }
1972
1973    $ns_dir  = utf8_encodeFN(str_replace(':','/',$ns));
1974
1975    $data = array();
1976    search($data,$conf['mediadir'],'search_index',array('ns' => $ns_dir, 'nofiles' => true));
1977
1978    // wrap a list with the root level around the other namespaces
1979    array_unshift($data, array('level' => 0, 'id' => '', 'open' =>'true',
1980                               'label' => '['.$lang['mediaroot'].']'));
1981
1982    // insert the current ns into the hierarchy if it isn't already part of it
1983    $ns_parts = explode(':', $ns);
1984    $tmp_ns = '';
1985    $pos = 0;
1986    foreach ($ns_parts as $level => $part) {
1987        if ($tmp_ns) $tmp_ns .= ':'.$part;
1988        else $tmp_ns = $part;
1989
1990        // find the namespace parts or insert them
1991        while ($data[$pos]['id'] != $tmp_ns) {
1992            if (
1993                $pos >= count($data) ||
1994                (
1995                    $data[$pos]['level'] <= $level+1 &&
1996                    strnatcmp(utf8_encodeFN($data[$pos]['id']), utf8_encodeFN($tmp_ns)) > 0
1997                )
1998            ) {
1999                array_splice($data, $pos, 0, array(array('level' => $level+1, 'id' => $tmp_ns, 'open' => 'true')));
2000                break;
2001            }
2002            ++$pos;
2003        }
2004    }
2005
2006    echo html_buildlist($data,'idx','media_nstree_item','media_nstree_li');
2007}
2008
2009/**
2010 * Userfunction for html_buildlist
2011 *
2012 * Prints a media namespace tree item
2013 *
2014 * @author Andreas Gohr <andi@splitbrain.org>
2015 *
2016 * @param array $item
2017 * @return string html
2018 */
2019function media_nstree_item($item){
2020    global $INPUT;
2021    $pos   = strrpos($item['id'], ':');
2022    $label = substr($item['id'], $pos > 0 ? $pos + 1 : 0);
2023    if(empty($item['label'])) $item['label'] = $label;
2024
2025    $ret  = '';
2026    if (!($INPUT->str('do') == 'media'))
2027    $ret .= '<a href="'.DOKU_BASE.'lib/exe/mediamanager.php?ns='.idfilter($item['id']).'" class="idx_dir">';
2028    else $ret .= '<a href="'.media_managerURL(['ns' => idfilter($item['id'], false), 'tab_files' => 'files'])
2029        .'" class="idx_dir">';
2030    $ret .= $item['label'];
2031    $ret .= '</a>';
2032    return $ret;
2033}
2034
2035/**
2036 * Userfunction for html_buildlist
2037 *
2038 * Prints a media namespace tree item opener
2039 *
2040 * @author Andreas Gohr <andi@splitbrain.org>
2041 *
2042 * @param array $item
2043 * @return string html
2044 */
2045function media_nstree_li($item){
2046    $class='media level'.$item['level'];
2047    if($item['open']){
2048        $class .= ' open';
2049        $img   = DOKU_BASE.'lib/images/minus.gif';
2050        $alt   = '−';
2051    }else{
2052        $class .= ' closed';
2053        $img   = DOKU_BASE.'lib/images/plus.gif';
2054        $alt   = '+';
2055    }
2056    // TODO: only deliver an image if it actually has a subtree...
2057    return '<li class="'.$class.'">'.
2058        '<img src="'.$img.'" alt="'.$alt.'" />';
2059}
2060
2061/**
2062 * Resizes the given image to the given size
2063 *
2064 * @author  Andreas Gohr <andi@splitbrain.org>
2065 *
2066 * @param string $file filename, path to file
2067 * @param string $ext  extension
2068 * @param int    $w    desired width
2069 * @param int    $h    desired height
2070 * @return string path to resized or original size if failed
2071 */
2072function media_resize_image($file, $ext, $w, $h=0){
2073    global $conf;
2074
2075    $info = @getimagesize($file); //get original size
2076    if($info == false) return $file; // that's no image - it's a spaceship!
2077
2078    if(!$h) $h = round(($w * $info[1]) / $info[0]);
2079    if(!$w) $w = round(($h * $info[0]) / $info[1]);
2080
2081    // we wont scale up to infinity
2082    if($w > 2000 || $h > 2000) return $file;
2083
2084    // resize necessary? - (w,h) = native dimensions
2085    if(($w == $info[0]) && ($h == $info[1])) return $file;
2086
2087    //cache
2088    $local = getCacheName($file,'.media.'.$w.'x'.$h.'.'.$ext);
2089    $mtime = @filemtime($local); // 0 if not exists
2090
2091    if($mtime > filemtime($file) ||
2092        media_resize_imageIM($ext, $file, $info[0], $info[1], $local, $w, $h) ||
2093        media_resize_imageGD($ext, $file, $info[0], $info[1], $local, $w, $h)
2094    ) {
2095        if($conf['fperm']) @chmod($local, $conf['fperm']);
2096        return $local;
2097    }
2098    //still here? resizing failed
2099    return $file;
2100}
2101
2102/**
2103 * Crops the given image to the wanted ratio, then calls media_resize_image to scale it
2104 * to the wanted size
2105 *
2106 * Crops are centered horizontally but prefer the upper third of an vertical
2107 * image because most pics are more interesting in that area (rule of thirds)
2108 *
2109 * @author  Andreas Gohr <andi@splitbrain.org>
2110 *
2111 * @param string $file filename, path to file
2112 * @param string $ext  extension
2113 * @param int    $w    desired width
2114 * @param int    $h    desired height
2115 * @return string path to resized or original size if failed
2116 */
2117function media_crop_image($file, $ext, $w, $h=0){
2118    global $conf;
2119
2120    if(!$h) $h = $w;
2121    $info = @getimagesize($file); //get original size
2122    if($info == false) return $file; // that's no image - it's a spaceship!
2123
2124    // calculate crop size
2125    $fr = $info[0]/$info[1];
2126    $tr = $w/$h;
2127
2128    // check if the crop can be handled completely by resize,
2129    // i.e. the specified width & height match the aspect ratio of the source image
2130    if ($w == round($h*$fr)) {
2131        return media_resize_image($file, $ext, $w);
2132    }
2133
2134    if($tr >= 1){
2135        if($tr > $fr){
2136            $cw = $info[0];
2137            $ch = (int) ($info[0]/$tr);
2138        }else{
2139            $cw = (int) ($info[1]*$tr);
2140            $ch = $info[1];
2141        }
2142    }else{
2143        if($tr < $fr){
2144            $cw = (int) ($info[1]*$tr);
2145            $ch = $info[1];
2146        }else{
2147            $cw = $info[0];
2148            $ch = (int) ($info[0]/$tr);
2149        }
2150    }
2151    // calculate crop offset
2152    $cx = (int) (($info[0]-$cw)/2);
2153    $cy = (int) (($info[1]-$ch)/3);
2154
2155    //cache
2156    $local = getCacheName($file,'.media.'.$cw.'x'.$ch.'.crop.'.$ext);
2157    $mtime = @filemtime($local); // 0 if not exists
2158
2159    if( $mtime > @filemtime($file) ||
2160            media_crop_imageIM($ext,$file,$info[0],$info[1],$local,$cw,$ch,$cx,$cy) ||
2161            media_resize_imageGD($ext,$file,$cw,$ch,$local,$cw,$ch,$cx,$cy) ){
2162        if($conf['fperm']) @chmod($local, $conf['fperm']);
2163        return media_resize_image($local,$ext, $w, $h);
2164    }
2165
2166    //still here? cropping failed
2167    return media_resize_image($file,$ext, $w, $h);
2168}
2169
2170/**
2171 * Calculate a token to be used to verify fetch requests for resized or
2172 * cropped images have been internally generated - and prevent external
2173 * DDOS attacks via fetch
2174 *
2175 * @author Christopher Smith <chris@jalakai.co.uk>
2176 *
2177 * @param string  $id    id of the image
2178 * @param int     $w     resize/crop width
2179 * @param int     $h     resize/crop height
2180 * @return string token or empty string if no token required
2181 */
2182function media_get_token($id,$w,$h){
2183    // token is only required for modified images
2184    if ($w || $h || media_isexternal($id)) {
2185        $token = $id;
2186        if ($w) $token .= '.'.$w;
2187        if ($h) $token .= '.'.$h;
2188
2189        return substr(\dokuwiki\PassHash::hmac('md5', $token, auth_cookiesalt()),0,6);
2190    }
2191
2192    return '';
2193}
2194
2195/**
2196 * Download a remote file and return local filename
2197 *
2198 * returns false if download fails. Uses cached file if available and
2199 * wanted
2200 *
2201 * @author  Andreas Gohr <andi@splitbrain.org>
2202 * @author  Pavel Vitis <Pavel.Vitis@seznam.cz>
2203 *
2204 * @param string $url
2205 * @param string $ext   extension
2206 * @param int    $cache cachetime in seconds
2207 * @return false|string path to cached file
2208 */
2209function media_get_from_URL($url,$ext,$cache){
2210    global $conf;
2211
2212    // if no cache or fetchsize just redirect
2213    if ($cache==0)           return false;
2214    if (!$conf['fetchsize']) return false;
2215
2216    $local = getCacheName(strtolower($url),".media.$ext");
2217    $mtime = @filemtime($local); // 0 if not exists
2218
2219    //decide if download needed:
2220    if(($mtime == 0) || // cache does not exist
2221        ($cache != -1 && $mtime < time() - $cache) // 'recache' and cache has expired
2222    ) {
2223        if(media_image_download($url, $local)) {
2224            return $local;
2225        } else {
2226            return false;
2227        }
2228    }
2229
2230    //if cache exists use it else
2231    if($mtime) return $local;
2232
2233    //else return false
2234    return false;
2235}
2236
2237/**
2238 * Download image files
2239 *
2240 * @author Andreas Gohr <andi@splitbrain.org>
2241 *
2242 * @param string $url
2243 * @param string $file path to file in which to put the downloaded content
2244 * @return bool
2245 */
2246function media_image_download($url,$file){
2247    global $conf;
2248    $http = new DokuHTTPClient();
2249    $http->keep_alive = false; // we do single ops here, no need for keep-alive
2250
2251    $http->max_bodysize = $conf['fetchsize'];
2252    $http->timeout = 25; //max. 25 sec
2253    $http->header_regexp = '!\r\nContent-Type: image/(jpe?g|gif|png)!i';
2254
2255    $data = $http->get($url);
2256    if(!$data) return false;
2257
2258    $fileexists = file_exists($file);
2259    $fp = @fopen($file,"w");
2260    if(!$fp) return false;
2261    fwrite($fp,$data);
2262    fclose($fp);
2263    if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
2264
2265    // check if it is really an image
2266    $info = @getimagesize($file);
2267    if(!$info){
2268        @unlink($file);
2269        return false;
2270    }
2271
2272    return true;
2273}
2274
2275/**
2276 * resize images using external ImageMagick convert program
2277 *
2278 * @author Pavel Vitis <Pavel.Vitis@seznam.cz>
2279 * @author Andreas Gohr <andi@splitbrain.org>
2280 *
2281 * @param string $ext     extension
2282 * @param string $from    filename path to file
2283 * @param int    $from_w  original width
2284 * @param int    $from_h  original height
2285 * @param string $to      path to resized file
2286 * @param int    $to_w    desired width
2287 * @param int    $to_h    desired height
2288 * @return bool
2289 */
2290function media_resize_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h){
2291    global $conf;
2292
2293    // check if convert is configured
2294    if(!$conf['im_convert']) return false;
2295
2296    // prepare command
2297    $cmd  = $conf['im_convert'];
2298    $cmd .= ' -resize '.$to_w.'x'.$to_h.'!';
2299    if ($ext == 'jpg' || $ext == 'jpeg') {
2300        $cmd .= ' -quality '.$conf['jpg_quality'];
2301    }
2302    $cmd .= " $from $to";
2303
2304    @exec($cmd,$out,$retval);
2305    if ($retval == 0) return true;
2306    return false;
2307}
2308
2309/**
2310 * crop images using external ImageMagick convert program
2311 *
2312 * @author Andreas Gohr <andi@splitbrain.org>
2313 *
2314 * @param string $ext     extension
2315 * @param string $from    filename path to file
2316 * @param int    $from_w  original width
2317 * @param int    $from_h  original height
2318 * @param string $to      path to resized file
2319 * @param int    $to_w    desired width
2320 * @param int    $to_h    desired height
2321 * @param int    $ofs_x   offset of crop centre
2322 * @param int    $ofs_y   offset of crop centre
2323 * @return bool
2324 */
2325function media_crop_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x,$ofs_y){
2326    global $conf;
2327
2328    // check if convert is configured
2329    if(!$conf['im_convert']) return false;
2330
2331    // prepare command
2332    $cmd  = $conf['im_convert'];
2333    $cmd .= ' -crop '.$to_w.'x'.$to_h.'+'.$ofs_x.'+'.$ofs_y;
2334    if ($ext == 'jpg' || $ext == 'jpeg') {
2335        $cmd .= ' -quality '.$conf['jpg_quality'];
2336    }
2337    $cmd .= " $from $to";
2338
2339    @exec($cmd,$out,$retval);
2340    if ($retval == 0) return true;
2341    return false;
2342}
2343
2344/**
2345 * resize or crop images using PHP's libGD support
2346 *
2347 * @author Andreas Gohr <andi@splitbrain.org>
2348 * @author Sebastian Wienecke <s_wienecke@web.de>
2349 *
2350 * @param string $ext     extension
2351 * @param string $from    filename path to file
2352 * @param int    $from_w  original width
2353 * @param int    $from_h  original height
2354 * @param string $to      path to resized file
2355 * @param int    $to_w    desired width
2356 * @param int    $to_h    desired height
2357 * @param int    $ofs_x   offset of crop centre
2358 * @param int    $ofs_y   offset of crop centre
2359 * @return bool
2360 */
2361function media_resize_imageGD($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x=0,$ofs_y=0){
2362    global $conf;
2363
2364    if($conf['gdlib'] < 1) return false; //no GDlib available or wanted
2365
2366    // check available memory
2367    if(!is_mem_available(($from_w * $from_h * 4) + ($to_w * $to_h * 4))){
2368        return false;
2369    }
2370
2371    // create an image of the given filetype
2372    $image = false;
2373    if ($ext == 'jpg' || $ext == 'jpeg'){
2374        if(!function_exists("imagecreatefromjpeg")) return false;
2375        $image = @imagecreatefromjpeg($from);
2376    }elseif($ext == 'png') {
2377        if(!function_exists("imagecreatefrompng")) return false;
2378        $image = @imagecreatefrompng($from);
2379
2380    }elseif($ext == 'gif') {
2381        if(!function_exists("imagecreatefromgif")) return false;
2382        $image = @imagecreatefromgif($from);
2383    }
2384    if(!$image) return false;
2385
2386    $newimg = false;
2387    if(($conf['gdlib']>1) && function_exists("imagecreatetruecolor") && $ext != 'gif'){
2388        $newimg = @imagecreatetruecolor ($to_w, $to_h);
2389    }
2390    if(!$newimg) $newimg = @imagecreate($to_w, $to_h);
2391    if(!$newimg){
2392        imagedestroy($image);
2393        return false;
2394    }
2395
2396    //keep png alpha channel if possible
2397    if($ext == 'png' && $conf['gdlib']>1 && function_exists('imagesavealpha')){
2398        imagealphablending($newimg, false);
2399        imagesavealpha($newimg,true);
2400    }
2401
2402    //keep gif transparent color if possible
2403    if($ext == 'gif' && function_exists('imagefill') && function_exists('imagecolorallocate')) {
2404        if(function_exists('imagecolorsforindex') && function_exists('imagecolortransparent')) {
2405            $transcolorindex = @imagecolortransparent($image);
2406            if($transcolorindex >= 0 ) { //transparent color exists
2407                $transcolor = @imagecolorsforindex($image, $transcolorindex);
2408                $transcolorindex = @imagecolorallocate(
2409                    $newimg,
2410                    $transcolor['red'],
2411                    $transcolor['green'],
2412                    $transcolor['blue']
2413                );
2414                @imagefill($newimg, 0, 0, $transcolorindex);
2415                @imagecolortransparent($newimg, $transcolorindex);
2416            }else{ //filling with white
2417                $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2418                @imagefill($newimg, 0, 0, $whitecolorindex);
2419            }
2420        }else{ //filling with white
2421            $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2422            @imagefill($newimg, 0, 0, $whitecolorindex);
2423        }
2424    }
2425
2426    //try resampling first
2427    if(function_exists("imagecopyresampled")){
2428        if(!@imagecopyresampled($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h)) {
2429            imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2430        }
2431    }else{
2432        imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2433    }
2434
2435    $okay = false;
2436    if ($ext == 'jpg' || $ext == 'jpeg'){
2437        if(!function_exists('imagejpeg')){
2438            $okay = false;
2439        }else{
2440            $okay = imagejpeg($newimg, $to, $conf['jpg_quality']);
2441        }
2442    }elseif($ext == 'png') {
2443        if(!function_exists('imagepng')){
2444            $okay = false;
2445        }else{
2446            $okay =  imagepng($newimg, $to);
2447        }
2448    }elseif($ext == 'gif') {
2449        if(!function_exists('imagegif')){
2450            $okay = false;
2451        }else{
2452            $okay = imagegif($newimg, $to);
2453        }
2454    }
2455
2456    // destroy GD image ressources
2457    if($image) imagedestroy($image);
2458    if($newimg) imagedestroy($newimg);
2459
2460    return $okay;
2461}
2462
2463/**
2464 * Return other media files with the same base name
2465 * but different extensions.
2466 *
2467 * @param string   $src     - ID of media file
2468 * @param string[] $exts    - alternative extensions to find other files for
2469 * @return array            - array(mime type => file ID)
2470 *
2471 * @author Anika Henke <anika@selfthinker.org>
2472 */
2473function media_alternativefiles($src, $exts){
2474
2475    $files = array();
2476    list($srcExt, /* $srcMime */) = mimetype($src);
2477    $filebase = substr($src, 0, -1 * (strlen($srcExt)+1));
2478
2479    foreach($exts as $ext) {
2480        $fileid = $filebase.'.'.$ext;
2481        $file = mediaFN($fileid);
2482        if(file_exists($file)) {
2483            list(/* $fileExt */, $fileMime) = mimetype($file);
2484            $files[$fileMime] = $fileid;
2485        }
2486    }
2487    return $files;
2488}
2489
2490/**
2491 * Check if video/audio is supported to be embedded.
2492 *
2493 * @param string $mime      - mimetype of media file
2494 * @param string $type      - type of media files to check ('video', 'audio', or null for all)
2495 * @return boolean
2496 *
2497 * @author Anika Henke <anika@selfthinker.org>
2498 */
2499function media_supportedav($mime, $type=NULL){
2500    $supportedAudio = array(
2501        'ogg' => 'audio/ogg',
2502        'mp3' => 'audio/mpeg',
2503        'wav' => 'audio/wav',
2504    );
2505    $supportedVideo = array(
2506        'webm' => 'video/webm',
2507        'ogv' => 'video/ogg',
2508        'mp4' => 'video/mp4',
2509    );
2510    if ($type == 'audio') {
2511        $supportedAv = $supportedAudio;
2512    } elseif ($type == 'video') {
2513        $supportedAv = $supportedVideo;
2514    } else {
2515        $supportedAv = array_merge($supportedAudio, $supportedVideo);
2516    }
2517    return in_array($mime, $supportedAv);
2518}
2519
2520/**
2521 * Return track media files with the same base name
2522 * but extensions that indicate kind and lang.
2523 * ie for foo.webm search foo.sub.lang.vtt, foo.cap.lang.vtt...
2524 *
2525 * @param string   $src     - ID of media file
2526 * @return array            - array(mediaID => array( kind, srclang ))
2527 *
2528 * @author Schplurtz le Déboulonné <Schplurtz@laposte.net>
2529 */
2530function media_trackfiles($src){
2531    $kinds=array(
2532        'sub' => 'subtitles',
2533        'cap' => 'captions',
2534        'des' => 'descriptions',
2535        'cha' => 'chapters',
2536        'met' => 'metadata'
2537    );
2538
2539    $files = array();
2540    $re='/\\.(sub|cap|des|cha|met)\\.([^.]+)\\.vtt$/';
2541    $baseid=pathinfo($src, PATHINFO_FILENAME);
2542    $pattern=mediaFN($baseid).'.*.*.vtt';
2543    $list=glob($pattern);
2544    foreach($list as $track) {
2545        if(preg_match($re, $track, $matches)){
2546            $files[$baseid.'.'.$matches[1].'.'.$matches[2].'.vtt']=array(
2547                $kinds[$matches[1]],
2548                $matches[2],
2549            );
2550        }
2551    }
2552    return $files;
2553}
2554
2555/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
2556