xref: /dokuwiki/inc/media.php (revision 198564ab361cd134dce0bcc8d07863157d1ae7a2) 
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\HTTPClient\DokuHTTPClient;
11
12/**
13 * Lists pages which currently use a media file selected for deletion
14 *
15 * References uses the same visual as search results and share
16 * their CSS tags except pagenames won't be links.
17 *
18 * @author Matthias Grimm <matthiasgrimm@users.sourceforge.net>
19 *
20 * @param array $data
21 * @param string $id
22 */
23function media_filesinuse($data,$id){
24    global $lang;
25    echo '<h1>'.$lang['reference'].' <code>'.hsc(noNS($id)).'</code></h1>';
26    echo '<p>'.hsc($lang['ref_inuse']).'</p>';
27
28    $hidden=0; //count of hits without read permission
29    foreach($data as $row){
30        if(auth_quickaclcheck($row) >= AUTH_READ && isVisiblePage($row)){
31            echo '<div class="search_result">';
32            echo '<span class="mediaref_ref">'.hsc($row).'</span>';
33            echo '</div>';
34        }else
35            $hidden++;
36    }
37    if ($hidden){
38        print '<div class="mediaref_hidden">'.$lang['ref_hidden'].'</div>';
39    }
40}
41
42/**
43 * Handles the saving of image meta data
44 *
45 * @author Andreas Gohr <andi@splitbrain.org>
46 * @author Kate Arzamastseva <pshns@ukr.net>
47 *
48 * @param string $id media id
49 * @param int $auth permission level
50 * @param array $data
51 * @return false|string
52 */
53function media_metasave($id,$auth,$data){
54    if($auth < AUTH_UPLOAD) return false;
55    if(!checkSecurityToken()) return false;
56    global $lang;
57    global $conf;
58    $src = mediaFN($id);
59
60    $meta = new JpegMeta($src);
61    $meta->_parseAll();
62
63    foreach($data as $key => $val){
64        $val=trim($val);
65        if(empty($val)){
66            $meta->deleteField($key);
67        }else{
68            $meta->setField($key,$val);
69        }
70    }
71
72    $old = @filemtime($src);
73    if(!file_exists(mediaFN($id, $old)) && file_exists($src)) {
74        // add old revision to the attic
75        media_saveOldRevision($id);
76    }
77    $filesize_old = filesize($src);
78    if($meta->save()){
79        if($conf['fperm']) chmod($src, $conf['fperm']);
80        @clearstatcache(true, $src);
81        $new = @filemtime($src);
82        $filesize_new = filesize($src);
83        $sizechange = $filesize_new - $filesize_old;
84
85        // add a log entry to the media changelog
86        addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT, $lang['media_meta_edited'], '', null, $sizechange);
87
88        msg($lang['metasaveok'],1);
89        return $id;
90    }else{
91        msg($lang['metasaveerr'],-1);
92        return false;
93    }
94}
95
96/**
97 * check if a media is external source
98 *
99 * @author Gerrit Uitslag <klapinklapin@gmail.com>
100 *
101 * @param string $id the media ID or URL
102 * @return bool
103 */
104function media_isexternal($id){
105    if (preg_match('#^(?:https?|ftp)://#i', $id)) return true;
106    return false;
107}
108
109/**
110 * Check if a media item is public (eg, external URL or readable by @ALL)
111 *
112 * @author Andreas Gohr <andi@splitbrain.org>
113 *
114 * @param string $id  the media ID or URL
115 * @return bool
116 */
117function media_ispublic($id){
118    if(media_isexternal($id)) return true;
119    $id = cleanID($id);
120    if(auth_aclcheck(getNS($id).':*', '', array()) >= AUTH_READ) return true;
121    return false;
122}
123
124/**
125 * Display the form to edit image meta data
126 *
127 * @author Andreas Gohr <andi@splitbrain.org>
128 * @author Kate Arzamastseva <pshns@ukr.net>
129 *
130 * @param string $id media id
131 * @param int $auth permission level
132 * @return bool
133 */
134function media_metaform($id,$auth){
135    global $lang;
136
137    if($auth < AUTH_UPLOAD) {
138        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.NL;
139        return false;
140    }
141
142    // load the field descriptions
143    static $fields = null;
144    if(is_null($fields)){
145        $config_files = getConfigFiles('mediameta');
146        foreach ($config_files as $config_file) {
147            if(file_exists($config_file)) include($config_file);
148        }
149    }
150
151    $src = mediaFN($id);
152
153    // output
154    $form = new Doku_Form(array('action' => media_managerURL(array('tab_details' => 'view'), '&'),
155                                'class' => 'meta'));
156    $form->addHidden('img', $id);
157    $form->addHidden('mediado', 'save');
158    foreach($fields as $key => $field){
159        // get current value
160        if (empty($field[0])) continue;
161        $tags = array($field[0]);
162        if(is_array($field[3])) $tags = array_merge($tags,$field[3]);
163        $value = tpl_img_getTag($tags,'',$src);
164        $value = cleanText($value);
165
166        // prepare attributes
167        $p = array();
168        $p['class'] = 'edit';
169        $p['id']    = 'meta__'.$key;
170        $p['name']  = 'meta['.$field[0].']';
171        $p_attrs    = array('class' => 'edit');
172
173        $form->addElement('<div class="row">');
174        if($field[2] == 'text'){
175            $form->addElement(
176                form_makeField(
177                    'text',
178                    $p['name'],
179                    $value,
180                    ($lang[$field[1]]) ? $lang[$field[1]] : $field[1] . ':',
181                    $p['id'],
182                    $p['class'],
183                    $p_attrs
184                )
185            );
186        }else{
187            $att = buildAttributes($p);
188            $form->addElement('<label for="meta__'.$key.'">'.$lang[$field[1]].'</label>');
189            $form->addElement("<textarea $att rows=\"6\" cols=\"50\">".formText($value).'</textarea>');
190        }
191        $form->addElement('</div>'.NL);
192    }
193    $form->addElement('<div class="buttons">');
194    $form->addElement(
195        form_makeButton(
196            'submit',
197            '',
198            $lang['btn_save'],
199            array('accesskey' => 's', 'name' => 'mediado[save]')
200        )
201    );
202    $form->addElement('</div>'.NL);
203    $form->printForm();
204
205    return true;
206}
207
208/**
209 * Convenience function to check if a media file is still in use
210 *
211 * @author Michael Klier <chi@chimeric.de>
212 *
213 * @param string $id media id
214 * @return array|bool
215 */
216function media_inuse($id) {
217    global $conf;
218
219    if($conf['refcheck']){
220        $mediareferences = ft_mediause($id,true);
221        if(!count($mediareferences)) {
222            return false;
223        } else {
224            return $mediareferences;
225        }
226    } else {
227        return false;
228    }
229}
230
231define('DOKU_MEDIA_DELETED', 1);
232define('DOKU_MEDIA_NOT_AUTH', 2);
233define('DOKU_MEDIA_INUSE', 4);
234define('DOKU_MEDIA_EMPTY_NS', 8);
235
236/**
237 * Handles media file deletions
238 *
239 * If configured, checks for media references before deletion
240 *
241 * @author             Andreas Gohr <andi@splitbrain.org>
242 *
243 * @param string $id media id
244 * @param int $auth no longer used
245 * @return int One of: 0,
246 *                     DOKU_MEDIA_DELETED,
247 *                     DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS,
248 *                     DOKU_MEDIA_NOT_AUTH,
249 *                     DOKU_MEDIA_INUSE
250 */
251function media_delete($id,$auth){
252    global $lang;
253    $auth = auth_quickaclcheck(ltrim(getNS($id).':*', ':'));
254    if($auth < AUTH_DELETE) return DOKU_MEDIA_NOT_AUTH;
255    if(media_inuse($id)) return DOKU_MEDIA_INUSE;
256
257    $file = mediaFN($id);
258
259    // trigger an event - MEDIA_DELETE_FILE
260    $data = array();
261    $data['id']   = $id;
262    $data['name'] = utf8_basename($file);
263    $data['path'] = $file;
264    $data['size'] = (file_exists($file)) ? filesize($file) : 0;
265
266    $data['unl'] = false;
267    $data['del'] = false;
268    $evt = new Doku_Event('MEDIA_DELETE_FILE',$data);
269    if ($evt->advise_before()) {
270        $old = @filemtime($file);
271        if(!file_exists(mediaFN($id, $old)) && file_exists($file)) {
272            // add old revision to the attic
273            media_saveOldRevision($id);
274        }
275
276        $data['unl'] = @unlink($file);
277        if($data['unl']) {
278            $sizechange = 0 - $data['size'];
279            addMediaLogEntry(time(), $id, DOKU_CHANGE_TYPE_DELETE, $lang['deleted'], '', null, $sizechange);
280
281            $data['del'] = io_sweepNS($id, 'mediadir');
282        }
283    }
284    $evt->advise_after();
285    unset($evt);
286
287    if($data['unl'] && $data['del']){
288        return DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS;
289    }
290
291    return $data['unl'] ? DOKU_MEDIA_DELETED : 0;
292}
293
294/**
295 * Handle file uploads via XMLHttpRequest
296 *
297 * @param string $ns   target namespace
298 * @param int    $auth current auth check result
299 * @return false|string false on error, id of the new file on success
300 */
301function media_upload_xhr($ns,$auth){
302    if(!checkSecurityToken()) return false;
303    global $INPUT;
304
305    $id = $INPUT->get->str('qqfile');
306    list($ext,$mime) = mimetype($id);
307    $input = fopen("php://input", "r");
308    if (!($tmp = io_mktmpdir())) return false;
309    $path = $tmp.'/'.md5($id);
310    $target = fopen($path, "w");
311    $realSize = stream_copy_to_stream($input, $target);
312    fclose($target);
313    fclose($input);
314    if (isset($_SERVER["CONTENT_LENGTH"]) && ($realSize != (int)$_SERVER["CONTENT_LENGTH"])){
315        unlink($path);
316        return false;
317    }
318
319    $res = media_save(
320        array('name' => $path,
321            'mime' => $mime,
322            'ext'  => $ext),
323        $ns.':'.$id,
324        (($INPUT->get->str('ow') == 'true') ? true : false),
325        $auth,
326        'copy'
327    );
328    unlink($path);
329    if ($tmp) io_rmdir($tmp, true);
330    if (is_array($res)) {
331        msg($res[0], $res[1]);
332        return false;
333    }
334    return $res;
335}
336
337/**
338 * Handles media file uploads
339 *
340 * @author Andreas Gohr <andi@splitbrain.org>
341 * @author Michael Klier <chi@chimeric.de>
342 *
343 * @param string     $ns    target namespace
344 * @param int        $auth  current auth check result
345 * @param bool|array $file  $_FILES member, $_FILES['upload'] if false
346 * @return false|string false on error, id of the new file on success
347 */
348function media_upload($ns,$auth,$file=false){
349    if(!checkSecurityToken()) return false;
350    global $lang;
351    global $INPUT;
352
353    // get file and id
354    $id   = $INPUT->post->str('mediaid');
355    if (!$file) $file = $_FILES['upload'];
356    if(empty($id)) $id = $file['name'];
357
358    // check for errors (messages are done in lib/exe/mediamanager.php)
359    if($file['error']) return false;
360
361    // check extensions
362    list($fext,$fmime) = mimetype($file['name']);
363    list($iext,$imime) = mimetype($id);
364    if($fext && !$iext){
365        // no extension specified in id - read original one
366        $id   .= '.'.$fext;
367        $imime = $fmime;
368    }elseif($fext && $fext != $iext){
369        // extension was changed, print warning
370        msg(sprintf($lang['mediaextchange'],$fext,$iext));
371    }
372
373    $res = media_save(array('name' => $file['tmp_name'],
374                            'mime' => $imime,
375                            'ext'  => $iext), $ns.':'.$id,
376                      $INPUT->post->bool('ow'), $auth, 'copy_uploaded_file');
377    if (is_array($res)) {
378        msg($res[0], $res[1]);
379        return false;
380    }
381    return $res;
382}
383
384/**
385 * An alternative to move_uploaded_file that copies
386 *
387 * Using copy, makes sure any setgid bits on the media directory are honored
388 *
389 * @see   move_uploaded_file()
390 *
391 * @param string $from
392 * @param string $to
393 * @return bool
394 */
395function copy_uploaded_file($from, $to){
396    if(!is_uploaded_file($from)) return false;
397    $ok = copy($from, $to);
398    @unlink($from);
399    return $ok;
400}
401
402/**
403 * This generates an action event and delegates to _media_upload_action().
404 * Action plugins are allowed to pre/postprocess the uploaded file.
405 * (The triggered event is preventable.)
406 *
407 * Event data:
408 * $data[0]     fn_tmp:    the temporary file name (read from $_FILES)
409 * $data[1]     fn:        the file name of the uploaded file
410 * $data[2]     id:        the future directory id of the uploaded file
411 * $data[3]     imime:     the mimetype of the uploaded file
412 * $data[4]     overwrite: if an existing file is going to be overwritten
413 * $data[5]     move:      name of function that performs move/copy/..
414 *
415 * @triggers MEDIA_UPLOAD_FINISH
416 *
417 * @param array  $file
418 * @param string $id   media id
419 * @param bool   $ow   overwrite?
420 * @param int    $auth permission level
421 * @param string $move name of functions that performs move/copy/..
422 * @return false|array|string
423 */
424function media_save($file, $id, $ow, $auth, $move) {
425    if($auth < AUTH_UPLOAD) {
426        return array("You don't have permissions to upload files.", -1);
427    }
428
429    if (!isset($file['mime']) || !isset($file['ext'])) {
430        list($ext, $mime) = mimetype($id);
431        if (!isset($file['mime'])) {
432            $file['mime'] = $mime;
433        }
434        if (!isset($file['ext'])) {
435            $file['ext'] = $ext;
436        }
437    }
438
439    global $lang, $conf;
440
441    // get filename
442    $id   = cleanID($id);
443    $fn   = mediaFN($id);
444
445    // get filetype regexp
446    $types = array_keys(getMimeTypes());
447    $types = array_map(
448        function ($q) {
449            return preg_quote($q, "/");
450        },
451        $types
452    );
453    $regex = join('|',$types);
454
455    // because a temp file was created already
456    if(!preg_match('/\.('.$regex.')$/i',$fn)) {
457        return array($lang['uploadwrong'],-1);
458    }
459
460    //check for overwrite
461    $overwrite = file_exists($fn);
462    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
463    if($overwrite && (!$ow || $auth < $auth_ow)) {
464        return array($lang['uploadexist'], 0);
465    }
466    // check for valid content
467    $ok = media_contentcheck($file['name'], $file['mime']);
468    if($ok == -1){
469        return array(sprintf($lang['uploadbadcontent'],'.' . $file['ext']),-1);
470    }elseif($ok == -2){
471        return array($lang['uploadspam'],-1);
472    }elseif($ok == -3){
473        return array($lang['uploadxss'],-1);
474    }
475
476    // prepare event data
477    $data = array();
478    $data[0] = $file['name'];
479    $data[1] = $fn;
480    $data[2] = $id;
481    $data[3] = $file['mime'];
482    $data[4] = $overwrite;
483    $data[5] = $move;
484
485    // trigger event
486    return trigger_event('MEDIA_UPLOAD_FINISH', $data, '_media_upload_action', true);
487}
488
489/**
490 * Callback adapter for media_upload_finish() triggered by MEDIA_UPLOAD_FINISH
491 *
492 * @author Michael Klier <chi@chimeric.de>
493 *
494 * @param array $data event data
495 * @return false|array|string
496 */
497function _media_upload_action($data) {
498    // fixme do further sanity tests of given data?
499    if(is_array($data) && count($data)===6) {
500        return media_upload_finish($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
501    } else {
502        return false; //callback error
503    }
504}
505
506/**
507 * Saves an uploaded media file
508 *
509 * @author Andreas Gohr <andi@splitbrain.org>
510 * @author Michael Klier <chi@chimeric.de>
511 * @author Kate Arzamastseva <pshns@ukr.net>
512 *
513 * @param string $fn_tmp
514 * @param string $fn
515 * @param string $id        media id
516 * @param string $imime     mime type
517 * @param bool   $overwrite overwrite existing?
518 * @param string $move      function name
519 * @return array|string
520 */
521function media_upload_finish($fn_tmp, $fn, $id, $imime, $overwrite, $move = 'move_uploaded_file') {
522    global $conf;
523    global $lang;
524    global $REV;
525
526    $old = @filemtime($fn);
527    if(!file_exists(mediaFN($id, $old)) && file_exists($fn)) {
528        // add old revision to the attic if missing
529        media_saveOldRevision($id);
530    }
531
532    // prepare directory
533    io_createNamespace($id, 'media');
534
535    $filesize_old = file_exists($fn) ? filesize($fn) : 0;
536
537    if($move($fn_tmp, $fn)) {
538        @clearstatcache(true,$fn);
539        $new = @filemtime($fn);
540        // Set the correct permission here.
541        // Always chmod media because they may be saved with different permissions than expected from the php umask.
542        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
543        chmod($fn, $conf['fmode']);
544        msg($lang['uploadsucc'],1);
545        media_notify($id,$fn,$imime,$old);
546        // add a log entry to the media changelog
547        $filesize_new = filesize($fn);
548        $sizechange = $filesize_new - $filesize_old;
549        if($REV) {
550            addMediaLogEntry(
551                $new,
552                $id,
553                DOKU_CHANGE_TYPE_REVERT,
554                sprintf($lang['restored'], dformat($REV)),
555                $REV,
556                null,
557                $sizechange
558            );
559        } elseif($overwrite) {
560            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT, '', '', null, $sizechange);
561        } else {
562            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created'], '', null, $sizechange);
563        }
564        return $id;
565    }else{
566        return array($lang['uploadfail'],-1);
567    }
568}
569
570/**
571 * Moves the current version of media file to the media_attic
572 * directory
573 *
574 * @author Kate Arzamastseva <pshns@ukr.net>
575 *
576 * @param string $id
577 * @return int - revision date
578 */
579function media_saveOldRevision($id){
580    global $conf, $lang;
581
582    $oldf = mediaFN($id);
583    if(!file_exists($oldf)) return '';
584    $date = filemtime($oldf);
585    if (!$conf['mediarevisions']) return $date;
586
587    $medialog = new MediaChangeLog($id);
588    if (!$medialog->getRevisionInfo($date)) {
589        // there was an external edit,
590        // there is no log entry for current version of file
591        $sizechange = filesize($oldf);
592        if(!file_exists(mediaMetaFN($id, '.changes'))) {
593            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created'], '', null, $sizechange);
594        } else {
595            $oldRev = $medialog->getRevisions(-1, 1); // from changelog
596            $oldRev = (int) (empty($oldRev) ? 0 : $oldRev[0]);
597            $filesize_old = filesize(mediaFN($id, $oldRev));
598            $sizechange = $sizechange - $filesize_old;
599
600            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_EDIT, '', '', null, $sizechange);
601        }
602    }
603
604    $newf = mediaFN($id,$date);
605    io_makeFileDir($newf);
606    if(copy($oldf, $newf)) {
607        // Set the correct permission here.
608        // Always chmod media because they may be saved with different permissions than expected from the php umask.
609        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
610        chmod($newf, $conf['fmode']);
611    }
612    return $date;
613}
614
615/**
616 * This function checks if the uploaded content is really what the
617 * mimetype says it is. We also do spam checking for text types here.
618 *
619 * We need to do this stuff because we can not rely on the browser
620 * to do this check correctly. Yes, IE is broken as usual.
621 *
622 * @author Andreas Gohr <andi@splitbrain.org>
623 * @link   http://www.splitbrain.org/blog/2007-02/12-internet_explorer_facilitates_cross_site_scripting
624 * @fixme  check all 26 magic IE filetypes here?
625 *
626 * @param string $file path to file
627 * @param string $mime mimetype
628 * @return int
629 */
630function media_contentcheck($file,$mime){
631    global $conf;
632    if($conf['iexssprotect']){
633        $fh = @fopen($file, 'rb');
634        if($fh){
635            $bytes = fread($fh, 256);
636            fclose($fh);
637            if(preg_match('/<(script|a|img|html|body|iframe)[\s>]/i',$bytes)){
638                return -3; //XSS: possibly malicious content
639            }
640        }
641    }
642    if(substr($mime,0,6) == 'image/'){
643        $info = @getimagesize($file);
644        if($mime == 'image/gif' && $info[2] != 1){
645            return -1; // uploaded content did not match the file extension
646        }elseif($mime == 'image/jpeg' && $info[2] != 2){
647            return -1;
648        }elseif($mime == 'image/png' && $info[2] != 3){
649            return -1;
650        }
651        # fixme maybe check other images types as well
652    }elseif(substr($mime,0,5) == 'text/'){
653        global $TEXT;
654        $TEXT = io_readFile($file);
655        if(checkwordblock()){
656            return -2; //blocked by the spam blacklist
657        }
658    }
659    return 0;
660}
661
662/**
663 * Send a notify mail on uploads
664 *
665 * @author Andreas Gohr <andi@splitbrain.org>
666 *
667 * @param string   $id      media id
668 * @param string   $file    path to file
669 * @param string   $mime    mime type
670 * @param bool|int $old_rev revision timestamp or false
671 * @return bool
672 */
673function media_notify($id,$file,$mime,$old_rev=false){
674    global $conf;
675    if(empty($conf['notify'])) return false; //notify enabled?
676
677    $subscription = new Subscription();
678    return $subscription->send_media_diff($conf['notify'], 'uploadmail', $id, $old_rev);
679}
680
681/**
682 * List all files in a given Media namespace
683 *
684 * @param string      $ns             namespace
685 * @param null|int    $auth           permission level
686 * @param string      $jump           id
687 * @param bool        $fullscreenview
688 * @param bool|string $sort           sorting order, false skips sorting
689 */
690function media_filelist($ns,$auth=null,$jump='',$fullscreenview=false,$sort=false){
691    global $conf;
692    global $lang;
693    $ns = cleanID($ns);
694
695    // check auth our self if not given (needed for ajax calls)
696    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
697
698    if (!$fullscreenview) echo '<h1 id="media__ns">:'.hsc($ns).'</h1>'.NL;
699
700    if($auth < AUTH_READ){
701        // FIXME: print permission warning here instead?
702        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
703    }else{
704        if (!$fullscreenview) {
705            media_uploadform($ns, $auth);
706            media_searchform($ns);
707        }
708
709        $dir = utf8_encodeFN(str_replace(':','/',$ns));
710        $data = array();
711        search($data,$conf['mediadir'],'search_media',
712                array('showmsg'=>true,'depth'=>1),$dir,1,$sort);
713
714        if(!count($data)){
715            echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
716        }else {
717            if ($fullscreenview) {
718                echo '<ul class="' . _media_get_list_type() . '">';
719            }
720            foreach($data as $item){
721                if (!$fullscreenview) {
722                    media_printfile($item,$auth,$jump);
723                } else {
724                    media_printfile_thumbs($item,$auth,$jump);
725                }
726            }
727            if ($fullscreenview) echo '</ul>'.NL;
728        }
729    }
730}
731
732/**
733 * Prints tabs for files list actions
734 *
735 * @author Kate Arzamastseva <pshns@ukr.net>
736 * @author Adrian Lang <mail@adrianlang.de>
737 *
738 * @param string $selected_tab - opened tab
739 */
740
741function media_tabs_files($selected_tab = ''){
742    global $lang;
743    $tabs = array();
744    foreach(array('files'  => 'mediaselect',
745                  'upload' => 'media_uploadtab',
746                  'search' => 'media_searchtab') as $tab => $caption) {
747        $tabs[$tab] = array('href'    => media_managerURL(array('tab_files' => $tab), '&'),
748                            'caption' => $lang[$caption]);
749    }
750
751    html_tabs($tabs, $selected_tab);
752}
753
754/**
755 * Prints tabs for files details actions
756 *
757 * @author Kate Arzamastseva <pshns@ukr.net>
758 * @param string $image filename of the current image
759 * @param string $selected_tab opened tab
760 */
761function media_tabs_details($image, $selected_tab = ''){
762    global $lang, $conf;
763
764    $tabs = array();
765    $tabs['view'] = array('href'    => media_managerURL(array('tab_details' => 'view'), '&'),
766                          'caption' => $lang['media_viewtab']);
767
768    list(, $mime) = mimetype($image);
769    if ($mime == 'image/jpeg' && file_exists(mediaFN($image))) {
770        $tabs['edit'] = array('href'    => media_managerURL(array('tab_details' => 'edit'), '&'),
771                              'caption' => $lang['media_edittab']);
772    }
773    if ($conf['mediarevisions']) {
774        $tabs['history'] = array('href'    => media_managerURL(array('tab_details' => 'history'), '&'),
775                                 'caption' => $lang['media_historytab']);
776    }
777
778    html_tabs($tabs, $selected_tab);
779}
780
781/**
782 * Prints options for the tab that displays a list of all files
783 *
784 * @author Kate Arzamastseva <pshns@ukr.net>
785 */
786function media_tab_files_options(){
787    global $lang;
788    global $INPUT;
789    global $ID;
790    $form = new Doku_Form(array('class' => 'options', 'method' => 'get',
791                                'action' => wl($ID)));
792    $media_manager_params = media_managerURL(array(), '', false, true);
793    foreach($media_manager_params as $pKey => $pVal){
794        $form->addHidden($pKey, $pVal);
795    }
796    $form->addHidden('sectok', null);
797    if ($INPUT->has('q')) {
798        $form->addHidden('q', $INPUT->str('q'));
799    }
800    $form->addElement('<ul>'.NL);
801    foreach(array('list' => array('listType', array('thumbs', 'rows')),
802                  'sort' => array('sortBy', array('name', 'date')))
803            as $group => $content) {
804        $checked = "_media_get_${group}_type";
805        $checked = $checked();
806
807        $form->addElement('<li class="' . $content[0] . '">');
808        foreach($content[1] as $option) {
809            $attrs = array();
810            if ($checked == $option) {
811                $attrs['checked'] = 'checked';
812            }
813            $form->addElement(form_makeRadioField($group . '_dwmedia', $option,
814                                       $lang['media_' . $group . '_' . $option],
815                                                  $content[0] . '__' . $option,
816                                                  $option, $attrs));
817        }
818        $form->addElement('</li>'.NL);
819    }
820    $form->addElement('<li>');
821    $form->addElement(form_makeButton('submit', '', $lang['btn_apply']));
822    $form->addElement('</li>'.NL);
823    $form->addElement('</ul>'.NL);
824    $form->printForm();
825}
826
827/**
828 * Returns type of sorting for the list of files in media manager
829 *
830 * @author Kate Arzamastseva <pshns@ukr.net>
831 *
832 * @return string - sort type
833 */
834function _media_get_sort_type() {
835    return _media_get_display_param('sort', array('default' => 'name', 'date'));
836}
837
838/**
839 * Returns type of listing for the list of files in media manager
840 *
841 * @author Kate Arzamastseva <pshns@ukr.net>
842 *
843 * @return string - list type
844 */
845function _media_get_list_type() {
846    return _media_get_display_param('list', array('default' => 'thumbs', 'rows'));
847}
848
849/**
850 * Get display parameters
851 *
852 * @param string $param   name of parameter
853 * @param array  $values  allowed values, where default value has index key 'default'
854 * @return string the parameter value
855 */
856function _media_get_display_param($param, $values) {
857    global $INPUT;
858    if (in_array($INPUT->str($param), $values)) {
859        // FIXME: Set cookie
860        return $INPUT->str($param);
861    } else {
862        $val = get_doku_pref($param, $values['default']);
863        if (!in_array($val, $values)) {
864            $val = $values['default'];
865        }
866        return $val;
867    }
868}
869
870/**
871 * Prints tab that displays a list of all files
872 *
873 * @author Kate Arzamastseva <pshns@ukr.net>
874 *
875 * @param string    $ns
876 * @param null|int  $auth permission level
877 * @param string    $jump item id
878 */
879function media_tab_files($ns,$auth=null,$jump='') {
880    global $lang;
881    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
882
883    if($auth < AUTH_READ){
884        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
885    }else{
886        media_filelist($ns,$auth,$jump,true,_media_get_sort_type());
887    }
888}
889
890/**
891 * Prints tab that displays uploading form
892 *
893 * @author Kate Arzamastseva <pshns@ukr.net>
894 *
895 * @param string   $ns
896 * @param null|int $auth permission level
897 * @param string   $jump item id
898 */
899function media_tab_upload($ns,$auth=null,$jump='') {
900    global $lang;
901    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
902
903    echo '<div class="upload">'.NL;
904    if ($auth >= AUTH_UPLOAD) {
905        echo '<p>' . $lang['mediaupload'] . '</p>';
906    }
907    media_uploadform($ns, $auth, true);
908    echo '</div>'.NL;
909}
910
911/**
912 * Prints tab that displays search form
913 *
914 * @author Kate Arzamastseva <pshns@ukr.net>
915 *
916 * @param string $ns
917 * @param null|int $auth permission level
918 */
919function media_tab_search($ns,$auth=null) {
920    global $INPUT;
921
922    $do = $INPUT->str('mediado');
923    $query = $INPUT->str('q');
924    echo '<div class="search">'.NL;
925
926    media_searchform($ns, $query, true);
927    if ($do == 'searchlist' || $query) {
928        media_searchlist($query,$ns,$auth,true,_media_get_sort_type());
929    }
930    echo '</div>'.NL;
931}
932
933/**
934 * Prints tab that displays mediafile details
935 *
936 * @author Kate Arzamastseva <pshns@ukr.net>
937 *
938 * @param string     $image media id
939 * @param string     $ns
940 * @param null|int   $auth  permission level
941 * @param string|int $rev   revision timestamp or empty string
942 */
943function media_tab_view($image, $ns, $auth=null, $rev='') {
944    global $lang;
945    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
946
947    if ($image && $auth >= AUTH_READ) {
948        $meta = new JpegMeta(mediaFN($image, $rev));
949        media_preview($image, $auth, $rev, $meta);
950        media_preview_buttons($image, $auth, $rev);
951        media_details($image, $auth, $rev, $meta);
952
953    } else {
954        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
955    }
956}
957
958/**
959 * Prints tab that displays form for editing mediafile metadata
960 *
961 * @author Kate Arzamastseva <pshns@ukr.net>
962 *
963 * @param string     $image media id
964 * @param string     $ns
965 * @param null|int   $auth permission level
966 */
967function media_tab_edit($image, $ns, $auth=null) {
968    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
969
970    if ($image) {
971        list(, $mime) = mimetype($image);
972        if ($mime == 'image/jpeg') media_metaform($image,$auth);
973    }
974}
975
976/**
977 * Prints tab that displays mediafile revisions
978 *
979 * @author Kate Arzamastseva <pshns@ukr.net>
980 *
981 * @param string     $image media id
982 * @param string     $ns
983 * @param null|int   $auth permission level
984 */
985function media_tab_history($image, $ns, $auth=null) {
986    global $lang;
987    global $INPUT;
988
989    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
990    $do = $INPUT->str('mediado');
991
992    if ($auth >= AUTH_READ && $image) {
993        if ($do == 'diff'){
994            media_diff($image, $ns, $auth);
995        } else {
996            $first = $INPUT->int('first');
997            html_revisions($first, $image);
998        }
999    } else {
1000        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
1001    }
1002}
1003
1004/**
1005 * Prints mediafile details
1006 *
1007 * @param string         $image media id
1008 * @param int            $auth permission level
1009 * @param int|string     $rev revision timestamp or empty string
1010 * @param JpegMeta|bool  $meta
1011 *
1012 * @author Kate Arzamastseva <pshns@ukr.net>
1013 */
1014function media_preview($image, $auth, $rev='', $meta=false) {
1015
1016    $size = media_image_preview_size($image, $rev, $meta);
1017
1018    if ($size) {
1019        global $lang;
1020        echo '<div class="image">';
1021
1022        $more = array();
1023        if ($rev) {
1024            $more['rev'] = $rev;
1025        } else {
1026            $t = @filemtime(mediaFN($image));
1027            $more['t'] = $t;
1028        }
1029
1030        $more['w'] = $size[0];
1031        $more['h'] = $size[1];
1032        $src = ml($image, $more);
1033
1034        echo '<a href="'.$src.'" target="_blank" title="'.$lang['mediaview'].'">';
1035        echo '<img src="'.$src.'" alt="" style="max-width: '.$size[0].'px;" />';
1036        echo '</a>';
1037
1038        echo '</div>'.NL;
1039    }
1040}
1041
1042/**
1043 * Prints mediafile action buttons
1044 *
1045 * @author Kate Arzamastseva <pshns@ukr.net>
1046 *
1047 * @param string     $image media id
1048 * @param int        $auth  permission level
1049 * @param string|int $rev   revision timestamp, or empty string
1050 */
1051function media_preview_buttons($image, $auth, $rev='') {
1052    global $lang, $conf;
1053
1054    echo '<ul class="actions">'.NL;
1055
1056    if($auth >= AUTH_DELETE && !$rev && file_exists(mediaFN($image))){
1057
1058        // delete button
1059        $form = new Doku_Form(array('id' => 'mediamanager__btn_delete',
1060            'action'=>media_managerURL(array('delete' => $image), '&')));
1061        $form->addElement(form_makeButton('submit','',$lang['btn_delete']));
1062        echo '<li>';
1063        $form->printForm();
1064        echo '</li>'.NL;
1065    }
1066
1067    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1068    if($auth >= $auth_ow && !$rev){
1069
1070        // upload new version button
1071        $form = new Doku_Form(array('id' => 'mediamanager__btn_update',
1072            'action'=>media_managerURL(array('image' => $image, 'mediado' => 'update'), '&')));
1073        $form->addElement(form_makeButton('submit','',$lang['media_update']));
1074        echo '<li>';
1075        $form->printForm();
1076        echo '</li>'.NL;
1077    }
1078
1079    if($auth >= AUTH_UPLOAD && $rev && $conf['mediarevisions'] && file_exists(mediaFN($image, $rev))){
1080
1081        // restore button
1082        $form = new Doku_Form(array('id' => 'mediamanager__btn_restore',
1083            'action'=>media_managerURL(array('image' => $image), '&')));
1084        $form->addHidden('mediado','restore');
1085        $form->addHidden('rev',$rev);
1086        $form->addElement(form_makeButton('submit','',$lang['media_restore']));
1087        echo '<li>';
1088        $form->printForm();
1089        echo '</li>'.NL;
1090    }
1091
1092    echo '</ul>'.NL;
1093}
1094
1095/**
1096 * Returns image width and height for mediamanager preview panel
1097 *
1098 * @author Kate Arzamastseva <pshns@ukr.net>
1099 * @param string         $image
1100 * @param int|string     $rev
1101 * @param JpegMeta|bool  $meta
1102 * @param int            $size
1103 * @return array|false
1104 */
1105function media_image_preview_size($image, $rev, $meta, $size = 500) {
1106    if (!preg_match("/\.(jpe?g|gif|png)$/", $image) || !file_exists(mediaFN($image, $rev))) return false;
1107
1108    $info = getimagesize(mediaFN($image, $rev));
1109    $w = (int) $info[0];
1110    $h = (int) $info[1];
1111
1112    if($meta && ($w > $size || $h > $size)){
1113        $ratio = $meta->getResizeRatio($size, $size);
1114        $w = floor($w * $ratio);
1115        $h = floor($h * $ratio);
1116    }
1117    return array($w, $h);
1118}
1119
1120/**
1121 * Returns the requested EXIF/IPTC tag from the image meta
1122 *
1123 * @author Kate Arzamastseva <pshns@ukr.net>
1124 *
1125 * @param array    $tags array with tags, first existing is returned
1126 * @param JpegMeta $meta
1127 * @param string   $alt  alternative value
1128 * @return string
1129 */
1130function media_getTag($tags,$meta,$alt=''){
1131    if($meta === false) return $alt;
1132    $info = $meta->getField($tags);
1133    if($info == false) return $alt;
1134    return $info;
1135}
1136
1137/**
1138 * Returns mediafile tags
1139 *
1140 * @author Kate Arzamastseva <pshns@ukr.net>
1141 *
1142 * @param JpegMeta $meta
1143 * @return array list of tags of the mediafile
1144 */
1145function media_file_tags($meta) {
1146    // load the field descriptions
1147    static $fields = null;
1148    if(is_null($fields)){
1149        $config_files = getConfigFiles('mediameta');
1150        foreach ($config_files as $config_file) {
1151            if(file_exists($config_file)) include($config_file);
1152        }
1153    }
1154
1155    $tags = array();
1156
1157    foreach($fields as $key => $tag){
1158        $t = array();
1159        if (!empty($tag[0])) $t = array($tag[0]);
1160        if(isset($tag[3]) && is_array($tag[3])) $t = array_merge($t,$tag[3]);
1161        $value = media_getTag($t, $meta);
1162        $tags[] = array('tag' => $tag, 'value' => $value);
1163    }
1164
1165    return $tags;
1166}
1167
1168/**
1169 * Prints mediafile tags
1170 *
1171 * @author Kate Arzamastseva <pshns@ukr.net>
1172 *
1173 * @param string        $image image id
1174 * @param int           $auth  permission level
1175 * @param string|int    $rev   revision timestamp, or empty string
1176 * @param bool|JpegMeta $meta  image object, or create one if false
1177 */
1178function media_details($image, $auth, $rev='', $meta=false) {
1179    global $lang;
1180
1181    if (!$meta) $meta = new JpegMeta(mediaFN($image, $rev));
1182    $tags = media_file_tags($meta);
1183
1184    echo '<dl>'.NL;
1185    foreach($tags as $tag){
1186        if ($tag['value']) {
1187            $value = cleanText($tag['value']);
1188            echo '<dt>'.$lang[$tag['tag'][1]].'</dt><dd>';
1189            if ($tag['tag'][2] == 'date') echo dformat($value);
1190            else echo hsc($value);
1191            echo '</dd>'.NL;
1192        }
1193    }
1194    echo '</dl>'.NL;
1195    echo '<dl>'.NL;
1196    echo '<dt>'.$lang['reference'].':</dt>';
1197    $media_usage = ft_mediause($image,true);
1198    if(count($media_usage) > 0){
1199        foreach($media_usage as $path){
1200            echo '<dd>'.html_wikilink($path).'</dd>';
1201        }
1202    }else{
1203        echo '<dd>'.$lang['nothingfound'].'</dd>';
1204    }
1205    echo '</dl>'.NL;
1206
1207}
1208
1209/**
1210 * Shows difference between two revisions of file
1211 *
1212 * @author Kate Arzamastseva <pshns@ukr.net>
1213 *
1214 * @param string $image  image id
1215 * @param string $ns
1216 * @param int $auth permission level
1217 * @param bool $fromajax
1218 * @return false|null|string
1219 */
1220function media_diff($image, $ns, $auth, $fromajax = false) {
1221    global $conf;
1222    global $INPUT;
1223
1224    if ($auth < AUTH_READ || !$image || !$conf['mediarevisions']) return '';
1225
1226    $rev1 = $INPUT->int('rev');
1227
1228    $rev2 = $INPUT->ref('rev2');
1229    if(is_array($rev2)){
1230        $rev1 = (int) $rev2[0];
1231        $rev2 = (int) $rev2[1];
1232
1233        if(!$rev1){
1234            $rev1 = $rev2;
1235            unset($rev2);
1236        }
1237    }else{
1238        $rev2 = $INPUT->int('rev2');
1239    }
1240
1241    if ($rev1 && !file_exists(mediaFN($image, $rev1))) $rev1 = false;
1242    if ($rev2 && !file_exists(mediaFN($image, $rev2))) $rev2 = false;
1243
1244    if($rev1 && $rev2){            // two specific revisions wanted
1245        // make sure order is correct (older on the left)
1246        if($rev1 < $rev2){
1247            $l_rev = $rev1;
1248            $r_rev = $rev2;
1249        }else{
1250            $l_rev = $rev2;
1251            $r_rev = $rev1;
1252        }
1253    }elseif($rev1){                // single revision given, compare to current
1254        $r_rev = '';
1255        $l_rev = $rev1;
1256    }else{                        // no revision was given, compare previous to current
1257        $r_rev = '';
1258        $medialog = new MediaChangeLog($image);
1259        $revs = $medialog->getRevisions(0, 1);
1260        if (file_exists(mediaFN($image, $revs[0]))) {
1261            $l_rev = $revs[0];
1262        } else {
1263            $l_rev = '';
1264        }
1265    }
1266
1267    // prepare event data
1268    $data = array();
1269    $data[0] = $image;
1270    $data[1] = $l_rev;
1271    $data[2] = $r_rev;
1272    $data[3] = $ns;
1273    $data[4] = $auth;
1274    $data[5] = $fromajax;
1275
1276    // trigger event
1277    return trigger_event('MEDIA_DIFF', $data, '_media_file_diff', true);
1278}
1279
1280/**
1281 * Callback for media file diff
1282 *
1283 * @param array $data event data
1284 * @return false|null
1285 */
1286function _media_file_diff($data) {
1287    if(is_array($data) && count($data)===6) {
1288        media_file_diff($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
1289    } else {
1290        return false;
1291    }
1292}
1293
1294/**
1295 * Shows difference between two revisions of image
1296 *
1297 * @author Kate Arzamastseva <pshns@ukr.net>
1298 *
1299 * @param string $image
1300 * @param string|int $l_rev revision timestamp, or empty string
1301 * @param string|int $r_rev revision timestamp, or empty string
1302 * @param string $ns
1303 * @param int $auth permission level
1304 * @param bool $fromajax
1305 */
1306function media_file_diff($image, $l_rev, $r_rev, $ns, $auth, $fromajax){
1307    global $lang;
1308    global $INPUT;
1309
1310    $l_meta = new JpegMeta(mediaFN($image, $l_rev));
1311    $r_meta = new JpegMeta(mediaFN($image, $r_rev));
1312
1313    $is_img = preg_match('/\.(jpe?g|gif|png)$/', $image);
1314    if ($is_img) {
1315        $l_size = media_image_preview_size($image, $l_rev, $l_meta);
1316        $r_size = media_image_preview_size($image, $r_rev, $r_meta);
1317        $is_img = ($l_size && $r_size && ($l_size[0] >= 30 || $r_size[0] >= 30));
1318
1319        $difftype = $INPUT->str('difftype');
1320
1321        if (!$fromajax) {
1322            $form = new Doku_Form(array(
1323                'action' => media_managerURL(array(), '&'),
1324                'method' => 'get',
1325                'id' => 'mediamanager__form_diffview',
1326                'class' => 'diffView'
1327            ));
1328            $form->addHidden('sectok', null);
1329            $form->addElement('<input type="hidden" name="rev2[]" value="'.$l_rev.'" ></input>');
1330            $form->addElement('<input type="hidden" name="rev2[]" value="'.$r_rev.'" ></input>');
1331            $form->addHidden('mediado', 'diff');
1332            $form->printForm();
1333
1334            echo NL.'<div id="mediamanager__diff" >'.NL;
1335        }
1336
1337        if ($difftype == 'opacity' || $difftype == 'portions') {
1338            media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $difftype);
1339            if (!$fromajax) echo '</div>';
1340            return;
1341        }
1342    }
1343
1344    list($l_head, $r_head) = html_diff_head($l_rev, $r_rev, $image, true);
1345
1346    ?>
1347    <div class="table">
1348    <table>
1349      <tr>
1350        <th><?php echo $l_head; ?></th>
1351        <th><?php echo $r_head; ?></th>
1352      </tr>
1353    <?php
1354
1355    echo '<tr class="image">';
1356    echo '<td>';
1357    media_preview($image, $auth, $l_rev, $l_meta);
1358    echo '</td>';
1359
1360    echo '<td>';
1361    media_preview($image, $auth, $r_rev, $r_meta);
1362    echo '</td>';
1363    echo '</tr>'.NL;
1364
1365    echo '<tr class="actions">';
1366    echo '<td>';
1367    media_preview_buttons($image, $auth, $l_rev);
1368    echo '</td>';
1369
1370    echo '<td>';
1371    media_preview_buttons($image, $auth, $r_rev);
1372    echo '</td>';
1373    echo '</tr>'.NL;
1374
1375    $l_tags = media_file_tags($l_meta);
1376    $r_tags = media_file_tags($r_meta);
1377    // FIXME r_tags-only stuff
1378    foreach ($l_tags as $key => $l_tag) {
1379        if ($l_tag['value'] != $r_tags[$key]['value']) {
1380            $r_tags[$key]['highlighted'] = true;
1381            $l_tags[$key]['highlighted'] = true;
1382        } else if (!$l_tag['value'] || !$r_tags[$key]['value']) {
1383            unset($r_tags[$key]);
1384            unset($l_tags[$key]);
1385        }
1386    }
1387
1388    echo '<tr>';
1389    foreach(array($l_tags,$r_tags) as $tags){
1390        echo '<td>'.NL;
1391
1392        echo '<dl class="img_tags">';
1393        foreach($tags as $tag){
1394            $value = cleanText($tag['value']);
1395            if (!$value) $value = '-';
1396            echo '<dt>'.$lang[$tag['tag'][1]].'</dt>';
1397            echo '<dd>';
1398            if ($tag['highlighted']) {
1399                echo '<strong>';
1400            }
1401            if ($tag['tag'][2] == 'date') echo dformat($value);
1402            else echo hsc($value);
1403            if ($tag['highlighted']) {
1404                echo '</strong>';
1405            }
1406            echo '</dd>';
1407        }
1408        echo '</dl>'.NL;
1409
1410        echo '</td>';
1411    }
1412    echo '</tr>'.NL;
1413
1414    echo '</table>'.NL;
1415    echo '</div>'.NL;
1416
1417    if ($is_img && !$fromajax) echo '</div>';
1418}
1419
1420/**
1421 * Prints two images side by side
1422 * and slider
1423 *
1424 * @author Kate Arzamastseva <pshns@ukr.net>
1425 *
1426 * @param string $image   image id
1427 * @param int    $l_rev   revision timestamp, or empty string
1428 * @param int    $r_rev   revision timestamp, or empty string
1429 * @param array  $l_size  array with width and height
1430 * @param array  $r_size  array with width and height
1431 * @param string $type
1432 */
1433function media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $type) {
1434    if ($l_size != $r_size) {
1435        if ($r_size[0] > $l_size[0]) {
1436            $l_size = $r_size;
1437        }
1438    }
1439
1440    $l_more = array('rev' => $l_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1441    $r_more = array('rev' => $r_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1442
1443    $l_src = ml($image, $l_more);
1444    $r_src = ml($image, $r_more);
1445
1446    // slider
1447    echo '<div class="slider" style="max-width: '.($l_size[0]-20).'px;" ></div>'.NL;
1448
1449    // two images in divs
1450    echo '<div class="imageDiff ' . $type . '">'.NL;
1451    echo '<div class="image1" style="max-width: '.$l_size[0].'px;">';
1452    echo '<img src="'.$l_src.'" alt="" />';
1453    echo '</div>'.NL;
1454    echo '<div class="image2" style="max-width: '.$l_size[0].'px;">';
1455    echo '<img src="'.$r_src.'" alt="" />';
1456    echo '</div>'.NL;
1457    echo '</div>'.NL;
1458}
1459
1460/**
1461 * Restores an old revision of a media file
1462 *
1463 * @param string $image media id
1464 * @param int    $rev   revision timestamp or empty string
1465 * @param int    $auth
1466 * @return string - file's id
1467 *
1468 * @author Kate Arzamastseva <pshns@ukr.net>
1469 */
1470function media_restore($image, $rev, $auth){
1471    global $conf;
1472    if ($auth < AUTH_UPLOAD || !$conf['mediarevisions']) return false;
1473    $removed = (!file_exists(mediaFN($image)) && file_exists(mediaMetaFN($image, '.changes')));
1474    if (!$image || (!file_exists(mediaFN($image)) && !$removed)) return false;
1475    if (!$rev || !file_exists(mediaFN($image, $rev))) return false;
1476    list(,$imime,) = mimetype($image);
1477    $res = media_upload_finish(mediaFN($image, $rev),
1478        mediaFN($image),
1479        $image,
1480        $imime,
1481        true,
1482        'copy');
1483    if (is_array($res)) {
1484        msg($res[0], $res[1]);
1485        return false;
1486    }
1487    return $res;
1488}
1489
1490/**
1491 * List all files found by the search request
1492 *
1493 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1494 * @author Andreas Gohr <gohr@cosmocode.de>
1495 * @author Kate Arzamastseva <pshns@ukr.net>
1496 * @triggers MEDIA_SEARCH
1497 *
1498 * @param string $query
1499 * @param string $ns
1500 * @param null|int $auth
1501 * @param bool $fullscreen
1502 * @param string $sort
1503 */
1504function media_searchlist($query,$ns,$auth=null,$fullscreen=false,$sort='natural'){
1505    global $conf;
1506    global $lang;
1507
1508    $ns = cleanID($ns);
1509    $evdata = array(
1510        'ns'    => $ns,
1511        'data'  => array(),
1512        'query' => $query
1513    );
1514    if (!blank($query)) {
1515        $evt = new Doku_Event('MEDIA_SEARCH', $evdata);
1516        if ($evt->advise_before()) {
1517            $dir = utf8_encodeFN(str_replace(':','/',$evdata['ns']));
1518            $quoted = preg_quote($evdata['query'],'/');
1519            //apply globbing
1520            $quoted = str_replace(array('\*', '\?'), array('.*', '.'), $quoted, $count);
1521
1522            //if we use globbing file name must match entirely but may be preceded by arbitrary namespace
1523            if ($count > 0) $quoted = '^([^:]*:)*'.$quoted.'$';
1524
1525            $pattern = '/'.$quoted.'/i';
1526            search($evdata['data'],
1527                    $conf['mediadir'],
1528                    'search_media',
1529                    array('showmsg'=>false,'pattern'=>$pattern),
1530                    $dir,
1531                    1,
1532                    $sort);
1533        }
1534        $evt->advise_after();
1535        unset($evt);
1536    }
1537
1538    if (!$fullscreen) {
1539        echo '<h1 id="media__ns">'.sprintf($lang['searchmedia_in'],hsc($ns).':*').'</h1>'.NL;
1540        media_searchform($ns,$query);
1541    }
1542
1543    if(!count($evdata['data'])){
1544        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
1545    }else {
1546        if ($fullscreen) {
1547            echo '<ul class="' . _media_get_list_type() . '">';
1548        }
1549        foreach($evdata['data'] as $item){
1550            if (!$fullscreen) media_printfile($item,$item['perm'],'',true);
1551            else media_printfile_thumbs($item,$item['perm'],false,true);
1552        }
1553        if ($fullscreen) echo '</ul>'.NL;
1554    }
1555}
1556
1557/**
1558 * Formats and prints one file in the list
1559 *
1560 * @param array     $item
1561 * @param int       $auth              permission level
1562 * @param string    $jump              item id
1563 * @param bool      $display_namespace
1564 */
1565function media_printfile($item,$auth,$jump,$display_namespace=false){
1566    global $lang;
1567
1568    // Prepare zebra coloring
1569    // I always wanted to use this variable name :-D
1570    static $twibble = 1;
1571    $twibble *= -1;
1572    $zebra = ($twibble == -1) ? 'odd' : 'even';
1573
1574    // Automatically jump to recent action
1575    if($jump == $item['id']) {
1576        $jump = ' id="scroll__here" ';
1577    }else{
1578        $jump = '';
1579    }
1580
1581    // Prepare fileicons
1582    list($ext) = mimetype($item['file'],false);
1583    $class = preg_replace('/[^_\-a-z0-9]+/i','_',$ext);
1584    $class = 'select mediafile mf_'.$class;
1585
1586    // Prepare filename
1587    $file = utf8_decodeFN($item['file']);
1588
1589    // Prepare info
1590    $info = '';
1591    if($item['isimg']){
1592        $info .= (int) $item['meta']->getField('File.Width');
1593        $info .= '&#215;';
1594        $info .= (int) $item['meta']->getField('File.Height');
1595        $info .= ' ';
1596    }
1597    $info .= '<i>'.dformat($item['mtime']).'</i>';
1598    $info .= ' ';
1599    $info .= filesize_h($item['size']);
1600
1601    // output
1602    echo '<div class="'.$zebra.'"'.$jump.' title="'.hsc($item['id']).'">'.NL;
1603    if (!$display_namespace) {
1604        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($file).'</a> ';
1605    } else {
1606        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($item['id']).'</a><br/>';
1607    }
1608    echo '<span class="info">('.$info.')</span>'.NL;
1609
1610    // view button
1611    $link = ml($item['id'],'',true);
1612    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/magnifier.png" '.
1613        'alt="'.$lang['mediaview'].'" title="'.$lang['mediaview'].'" class="btn" /></a>';
1614
1615    // mediamanager button
1616    $link = wl('',array('do'=>'media','image'=>$item['id'],'ns'=>getNS($item['id'])));
1617    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/mediamanager.png" '.
1618        'alt="'.$lang['btn_media'].'" title="'.$lang['btn_media'].'" class="btn" /></a>';
1619
1620    // delete button
1621    if($item['writable'] && $auth >= AUTH_DELETE){
1622        $link = DOKU_BASE.'lib/exe/mediamanager.php?delete='.rawurlencode($item['id']).
1623            '&amp;sectok='.getSecurityToken();
1624        echo ' <a href="'.$link.'" class="btn_media_delete" title="'.$item['id'].'">'.
1625            '<img src="'.DOKU_BASE.'lib/images/trash.png" alt="'.$lang['btn_delete'].'" '.
1626            'title="'.$lang['btn_delete'].'" class="btn" /></a>';
1627    }
1628
1629    echo '<div class="example" id="ex_'.str_replace(':','_',$item['id']).'">';
1630    echo $lang['mediausage'].' <code>{{:'.$item['id'].'}}</code>';
1631    echo '</div>';
1632    if($item['isimg']) media_printimgdetail($item);
1633    echo '<div class="clearer"></div>'.NL;
1634    echo '</div>'.NL;
1635}
1636
1637/**
1638 * Display a media icon
1639 *
1640 * @param string $filename media id
1641 * @param string $size     the size subfolder, if not specified 16x16 is used
1642 * @return string html
1643 */
1644function media_printicon($filename, $size=''){
1645    list($ext) = mimetype(mediaFN($filename),false);
1646
1647    if (file_exists(DOKU_INC.'lib/images/fileicons/'.$size.'/'.$ext.'.png')) {
1648        $icon = DOKU_BASE.'lib/images/fileicons/'.$size.'/'.$ext.'.png';
1649    } else {
1650        $icon = DOKU_BASE.'lib/images/fileicons/'.$size.'/file.png';
1651    }
1652
1653    return '<img src="'.$icon.'" alt="'.$filename.'" class="icon" />';
1654}
1655
1656/**
1657 * Formats and prints one file in the list in the thumbnails view
1658 *
1659 * @author Kate Arzamastseva <pshns@ukr.net>
1660 *
1661 * @param array       $item
1662 * @param int         $auth              permission level
1663 * @param bool|string $jump              item id
1664 * @param bool        $display_namespace
1665 */
1666function media_printfile_thumbs($item,$auth,$jump=false,$display_namespace=false){
1667
1668    // Prepare filename
1669    $file = utf8_decodeFN($item['file']);
1670
1671    // output
1672    echo '<li><dl title="'.hsc($item['id']).'">'.NL;
1673
1674        echo '<dt>';
1675    if($item['isimg']) {
1676        media_printimgdetail($item, true);
1677
1678    } else {
1679        echo '<a id="d_:'.$item['id'].'" class="image" title="'.$item['id'].'" href="'.
1680            media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1681            'tab_details' => 'view')).'">';
1682        echo media_printicon($item['id'], '32x32');
1683        echo '</a>';
1684    }
1685    echo '</dt>'.NL;
1686    if (!$display_namespace) {
1687        $name = hsc($file);
1688    } else {
1689        $name = hsc($item['id']);
1690    }
1691    echo '<dd class="name"><a href="'.media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1692        'tab_details' => 'view')).'" id="h_:'.$item['id'].'">'.$name.'</a></dd>'.NL;
1693
1694    if($item['isimg']){
1695        $size = '';
1696        $size .= (int) $item['meta']->getField('File.Width');
1697        $size .= '&#215;';
1698        $size .= (int) $item['meta']->getField('File.Height');
1699        echo '<dd class="size">'.$size.'</dd>'.NL;
1700    } else {
1701        echo '<dd class="size">&#160;</dd>'.NL;
1702    }
1703    $date = dformat($item['mtime']);
1704    echo '<dd class="date">'.$date.'</dd>'.NL;
1705    $filesize = filesize_h($item['size']);
1706    echo '<dd class="filesize">'.$filesize.'</dd>'.NL;
1707    echo '</dl></li>'.NL;
1708}
1709
1710/**
1711 * Prints a thumbnail and metainfo
1712 *
1713 * @param array $item
1714 * @param bool  $fullscreen
1715 */
1716function media_printimgdetail($item, $fullscreen=false){
1717    // prepare thumbnail
1718    $size = $fullscreen ? 90 : 120;
1719
1720    $w = (int) $item['meta']->getField('File.Width');
1721    $h = (int) $item['meta']->getField('File.Height');
1722    if($w>$size || $h>$size){
1723        if (!$fullscreen) {
1724            $ratio = $item['meta']->getResizeRatio($size);
1725        } else {
1726            $ratio = $item['meta']->getResizeRatio($size,$size);
1727        }
1728        $w = floor($w * $ratio);
1729        $h = floor($h * $ratio);
1730    }
1731    $src = ml($item['id'],array('w'=>$w,'h'=>$h,'t'=>$item['mtime']));
1732    $p = array();
1733    if (!$fullscreen) {
1734        // In fullscreen mediamanager view, image resizing is done via CSS.
1735        $p['width']  = $w;
1736        $p['height'] = $h;
1737    }
1738    $p['alt']    = $item['id'];
1739    $att = buildAttributes($p);
1740
1741    // output
1742    if ($fullscreen) {
1743        echo '<a id="l_:'.$item['id'].'" class="image thumb" href="'.
1744            media_managerURL(['image' => hsc($item['id']), 'ns' => getNS($item['id']), 'tab_details' => 'view']).'">';
1745        echo '<img src="'.$src.'" '.$att.' />';
1746        echo '</a>';
1747    }
1748
1749    if ($fullscreen) return;
1750
1751    echo '<div class="detail">';
1752    echo '<div class="thumb">';
1753    echo '<a id="d_:'.$item['id'].'" class="select">';
1754    echo '<img src="'.$src.'" '.$att.' />';
1755    echo '</a>';
1756    echo '</div>';
1757
1758    // read EXIF/IPTC data
1759    $t = $item['meta']->getField(array('IPTC.Headline','xmp.dc:title'));
1760    $d = $item['meta']->getField(array('IPTC.Caption','EXIF.UserComment',
1761                'EXIF.TIFFImageDescription',
1762                'EXIF.TIFFUserComment'));
1763    if(utf8_strlen($d) > 250) $d = utf8_substr($d,0,250).'...';
1764    $k = $item['meta']->getField(array('IPTC.Keywords','IPTC.Category','xmp.dc:subject'));
1765
1766    // print EXIF/IPTC data
1767    if($t || $d || $k ){
1768        echo '<p>';
1769        if($t) echo '<strong>'.hsc($t).'</strong><br />';
1770        if($d) echo hsc($d).'<br />';
1771        if($t) echo '<em>'.hsc($k).'</em>';
1772        echo '</p>';
1773    }
1774    echo '</div>';
1775}
1776
1777/**
1778 * Build link based on the current, adding/rewriting parameters
1779 *
1780 * @author Kate Arzamastseva <pshns@ukr.net>
1781 *
1782 * @param array|bool $params
1783 * @param string     $amp           separator
1784 * @param bool       $abs           absolute url?
1785 * @param bool       $params_array  return the parmeters array?
1786 * @return string|array - link or link parameters
1787 */
1788function media_managerURL($params=false, $amp='&amp;', $abs=false, $params_array=false) {
1789    global $ID;
1790    global $INPUT;
1791
1792    $gets = array('do' => 'media');
1793    $media_manager_params = array('tab_files', 'tab_details', 'image', 'ns', 'list', 'sort');
1794    foreach ($media_manager_params as $x) {
1795        if ($INPUT->has($x)) $gets[$x] = $INPUT->str($x);
1796    }
1797
1798    if ($params) {
1799        $gets = $params + $gets;
1800    }
1801    unset($gets['id']);
1802    if (isset($gets['delete'])) {
1803        unset($gets['image']);
1804        unset($gets['tab_details']);
1805    }
1806
1807    if ($params_array) return $gets;
1808
1809    return wl($ID,$gets,$abs,$amp);
1810}
1811
1812/**
1813 * Print the media upload form if permissions are correct
1814 *
1815 * @author Andreas Gohr <andi@splitbrain.org>
1816 * @author Kate Arzamastseva <pshns@ukr.net>
1817 *
1818 * @param string $ns
1819 * @param int    $auth permission level
1820 * @param bool  $fullscreen
1821 */
1822function media_uploadform($ns, $auth, $fullscreen = false){
1823    global $lang;
1824    global $conf;
1825    global $INPUT;
1826
1827    if($auth < AUTH_UPLOAD) {
1828        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.NL;
1829        return;
1830    }
1831    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1832
1833    $update = false;
1834    $id = '';
1835    if ($auth >= $auth_ow && $fullscreen && $INPUT->str('mediado') == 'update') {
1836        $update = true;
1837        $id = cleanID($INPUT->str('image'));
1838    }
1839
1840    // The default HTML upload form
1841    $params = array('id'      => 'dw__upload',
1842                    'enctype' => 'multipart/form-data');
1843    if (!$fullscreen) {
1844        $params['action'] = DOKU_BASE.'lib/exe/mediamanager.php';
1845    } else {
1846        $params['action'] = media_managerURL(array('tab_files' => 'files',
1847            'tab_details' => 'view'), '&');
1848    }
1849
1850    $form = new Doku_Form($params);
1851    if (!$fullscreen) echo '<div class="upload">' . $lang['mediaupload'] . '</div>';
1852    $form->addElement(formSecurityToken());
1853    $form->addHidden('ns', hsc($ns));
1854    $form->addElement(form_makeOpenTag('p'));
1855    $form->addElement(form_makeFileField('upload', $lang['txt_upload'], 'upload__file'));
1856    $form->addElement(form_makeCloseTag('p'));
1857    $form->addElement(form_makeOpenTag('p'));
1858    $form->addElement(form_makeTextField('mediaid', noNS($id), $lang['txt_filename'], 'upload__name'));
1859    $form->addElement(form_makeButton('submit', '', $lang['btn_upload']));
1860    $form->addElement(form_makeCloseTag('p'));
1861
1862    if($auth >= $auth_ow){
1863        $form->addElement(form_makeOpenTag('p'));
1864        $attrs = array();
1865        if ($update) $attrs['checked'] = 'checked';
1866        $form->addElement(form_makeCheckboxField('ow', 1, $lang['txt_overwrt'], 'dw__ow', 'check', $attrs));
1867        $form->addElement(form_makeCloseTag('p'));
1868    }
1869
1870    echo NL.'<div id="mediamanager__uploader">'.NL;
1871    html_form('upload', $form);
1872
1873    echo '</div>'.NL;
1874
1875    echo '<p class="maxsize">';
1876    printf($lang['maxuploadsize'],filesize_h(media_getuploadsize()));
1877    echo '</p>'.NL;
1878
1879}
1880
1881/**
1882 * Returns the size uploaded files may have
1883 *
1884 * This uses a conservative approach using the lowest number found
1885 * in any of the limiting ini settings
1886 *
1887 * @returns int size in bytes
1888 */
1889function media_getuploadsize(){
1890    $okay = 0;
1891
1892    $post = (int) php_to_byte(@ini_get('post_max_size'));
1893    $suho = (int) php_to_byte(@ini_get('suhosin.post.max_value_length'));
1894    $upld = (int) php_to_byte(@ini_get('upload_max_filesize'));
1895
1896    if($post && ($post < $okay || $okay == 0)) $okay = $post;
1897    if($suho && ($suho < $okay || $okay == 0)) $okay = $suho;
1898    if($upld && ($upld < $okay || $okay == 0)) $okay = $upld;
1899
1900    return $okay;
1901}
1902
1903/**
1904 * Print the search field form
1905 *
1906 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1907 * @author Kate Arzamastseva <pshns@ukr.net>
1908 *
1909 * @param string $ns
1910 * @param string $query
1911 * @param bool $fullscreen
1912 */
1913function media_searchform($ns,$query='',$fullscreen=false){
1914    global $lang;
1915
1916    // The default HTML search form
1917    $params = array('id' => 'dw__mediasearch');
1918    if (!$fullscreen) {
1919        $params['action'] = DOKU_BASE.'lib/exe/mediamanager.php';
1920    } else {
1921        $params['action'] = media_managerURL(array(), '&');
1922    }
1923    $form = new Doku_Form($params);
1924    $form->addHidden('ns', $ns);
1925    $form->addHidden($fullscreen ? 'mediado' : 'do', 'searchlist');
1926
1927    $form->addElement(form_makeOpenTag('p'));
1928    $form->addElement(
1929        form_makeTextField(
1930            'q',
1931            $query,
1932            $lang['searchmedia'],
1933            '',
1934            '',
1935            array('title' => sprintf($lang['searchmedia_in'], hsc($ns) . ':*'))
1936        )
1937    );
1938    $form->addElement(form_makeButton('submit', '', $lang['btn_search']));
1939    $form->addElement(form_makeCloseTag('p'));
1940    html_form('searchmedia', $form);
1941}
1942
1943/**
1944 * Build a tree outline of available media namespaces
1945 *
1946 * @author Andreas Gohr <andi@splitbrain.org>
1947 *
1948 * @param string $ns
1949 */
1950function media_nstree($ns){
1951    global $conf;
1952    global $lang;
1953
1954    // currently selected namespace
1955    $ns  = cleanID($ns);
1956    if(empty($ns)){
1957        global $ID;
1958        $ns = (string)getNS($ID);
1959    }
1960
1961    $ns_dir  = utf8_encodeFN(str_replace(':','/',$ns));
1962
1963    $data = array();
1964    search($data,$conf['mediadir'],'search_index',array('ns' => $ns_dir, 'nofiles' => true));
1965
1966    // wrap a list with the root level around the other namespaces
1967    array_unshift($data, array('level' => 0, 'id' => '', 'open' =>'true',
1968                               'label' => '['.$lang['mediaroot'].']'));
1969
1970    // insert the current ns into the hierarchy if it isn't already part of it
1971    $ns_parts = explode(':', $ns);
1972    $tmp_ns = '';
1973    $pos = 0;
1974    foreach ($ns_parts as $level => $part) {
1975        if ($tmp_ns) $tmp_ns .= ':'.$part;
1976        else $tmp_ns = $part;
1977
1978        // find the namespace parts or insert them
1979        while ($data[$pos]['id'] != $tmp_ns) {
1980            if (
1981                $pos >= count($data) ||
1982                (
1983                    $data[$pos]['level'] <= $level+1 &&
1984                    strnatcmp(utf8_encodeFN($data[$pos]['id']), utf8_encodeFN($tmp_ns)) > 0
1985                )
1986            ) {
1987                array_splice($data, $pos, 0, array(array('level' => $level+1, 'id' => $tmp_ns, 'open' => 'true')));
1988                break;
1989            }
1990            ++$pos;
1991        }
1992    }
1993
1994    echo html_buildlist($data,'idx','media_nstree_item','media_nstree_li');
1995}
1996
1997/**
1998 * Userfunction for html_buildlist
1999 *
2000 * Prints a media namespace tree item
2001 *
2002 * @author Andreas Gohr <andi@splitbrain.org>
2003 *
2004 * @param array $item
2005 * @return string html
2006 */
2007function media_nstree_item($item){
2008    global $INPUT;
2009    $pos   = strrpos($item['id'], ':');
2010    $label = substr($item['id'], $pos > 0 ? $pos + 1 : 0);
2011    if(empty($item['label'])) $item['label'] = $label;
2012
2013    $ret  = '';
2014    if (!($INPUT->str('do') == 'media'))
2015    $ret .= '<a href="'.DOKU_BASE.'lib/exe/mediamanager.php?ns='.idfilter($item['id']).'" class="idx_dir">';
2016    else $ret .= '<a href="'.media_managerURL(array('ns' => idfilter($item['id'], false), 'tab_files' => 'files'))
2017        .'" class="idx_dir">';
2018    $ret .= $item['label'];
2019    $ret .= '</a>';
2020    return $ret;
2021}
2022
2023/**
2024 * Userfunction for html_buildlist
2025 *
2026 * Prints a media namespace tree item opener
2027 *
2028 * @author Andreas Gohr <andi@splitbrain.org>
2029 *
2030 * @param array $item
2031 * @return string html
2032 */
2033function media_nstree_li($item){
2034    $class='media level'.$item['level'];
2035    if($item['open']){
2036        $class .= ' open';
2037        $img   = DOKU_BASE.'lib/images/minus.gif';
2038        $alt   = '−';
2039    }else{
2040        $class .= ' closed';
2041        $img   = DOKU_BASE.'lib/images/plus.gif';
2042        $alt   = '+';
2043    }
2044    // TODO: only deliver an image if it actually has a subtree...
2045    return '<li class="'.$class.'">'.
2046        '<img src="'.$img.'" alt="'.$alt.'" />';
2047}
2048
2049/**
2050 * Resizes the given image to the given size
2051 *
2052 * @author  Andreas Gohr <andi@splitbrain.org>
2053 *
2054 * @param string $file filename, path to file
2055 * @param string $ext  extension
2056 * @param int    $w    desired width
2057 * @param int    $h    desired height
2058 * @return string path to resized or original size if failed
2059 */
2060function media_resize_image($file, $ext, $w, $h=0){
2061    global $conf;
2062
2063    $info = @getimagesize($file); //get original size
2064    if($info == false) return $file; // that's no image - it's a spaceship!
2065
2066    if(!$h) $h = round(($w * $info[1]) / $info[0]);
2067    if(!$w) $w = round(($h * $info[0]) / $info[1]);
2068
2069    // we wont scale up to infinity
2070    if($w > 2000 || $h > 2000) return $file;
2071
2072    // resize necessary? - (w,h) = native dimensions
2073    if(($w == $info[0]) && ($h == $info[1])) return $file;
2074
2075    //cache
2076    $local = getCacheName($file,'.media.'.$w.'x'.$h.'.'.$ext);
2077    $mtime = @filemtime($local); // 0 if not exists
2078
2079    if($mtime > filemtime($file) ||
2080        media_resize_imageIM($ext, $file, $info[0], $info[1], $local, $w, $h) ||
2081        media_resize_imageGD($ext, $file, $info[0], $info[1], $local, $w, $h)
2082    ) {
2083        if(!empty($conf['fperm'])) @chmod($local, $conf['fperm']);
2084        return $local;
2085    }
2086    //still here? resizing failed
2087    return $file;
2088}
2089
2090/**
2091 * Crops the given image to the wanted ratio, then calls media_resize_image to scale it
2092 * to the wanted size
2093 *
2094 * Crops are centered horizontally but prefer the upper third of an vertical
2095 * image because most pics are more interesting in that area (rule of thirds)
2096 *
2097 * @author  Andreas Gohr <andi@splitbrain.org>
2098 *
2099 * @param string $file filename, path to file
2100 * @param string $ext  extension
2101 * @param int    $w    desired width
2102 * @param int    $h    desired height
2103 * @return string path to resized or original size if failed
2104 */
2105function media_crop_image($file, $ext, $w, $h=0){
2106    global $conf;
2107
2108    if(!$h) $h = $w;
2109    $info = @getimagesize($file); //get original size
2110    if($info == false) return $file; // that's no image - it's a spaceship!
2111
2112    // calculate crop size
2113    $fr = $info[0]/$info[1];
2114    $tr = $w/$h;
2115
2116    // check if the crop can be handled completely by resize,
2117    // i.e. the specified width & height match the aspect ratio of the source image
2118    if ($w == round($h*$fr)) {
2119        return media_resize_image($file, $ext, $w);
2120    }
2121
2122    if($tr >= 1){
2123        if($tr > $fr){
2124            $cw = $info[0];
2125            $ch = (int) ($info[0]/$tr);
2126        }else{
2127            $cw = (int) ($info[1]*$tr);
2128            $ch = $info[1];
2129        }
2130    }else{
2131        if($tr < $fr){
2132            $cw = (int) ($info[1]*$tr);
2133            $ch = $info[1];
2134        }else{
2135            $cw = $info[0];
2136            $ch = (int) ($info[0]/$tr);
2137        }
2138    }
2139    // calculate crop offset
2140    $cx = (int) (($info[0]-$cw)/2);
2141    $cy = (int) (($info[1]-$ch)/3);
2142
2143    //cache
2144    $local = getCacheName($file,'.media.'.$cw.'x'.$ch.'.crop.'.$ext);
2145    $mtime = @filemtime($local); // 0 if not exists
2146
2147    if( $mtime > @filemtime($file) ||
2148            media_crop_imageIM($ext,$file,$info[0],$info[1],$local,$cw,$ch,$cx,$cy) ||
2149            media_resize_imageGD($ext,$file,$cw,$ch,$local,$cw,$ch,$cx,$cy) ){
2150        if(!empty($conf['fperm'])) @chmod($local, $conf['fperm']);
2151        return media_resize_image($local,$ext, $w, $h);
2152    }
2153
2154    //still here? cropping failed
2155    return media_resize_image($file,$ext, $w, $h);
2156}
2157
2158/**
2159 * Calculate a token to be used to verify fetch requests for resized or
2160 * cropped images have been internally generated - and prevent external
2161 * DDOS attacks via fetch
2162 *
2163 * @author Christopher Smith <chris@jalakai.co.uk>
2164 *
2165 * @param string  $id    id of the image
2166 * @param int     $w     resize/crop width
2167 * @param int     $h     resize/crop height
2168 * @return string token or empty string if no token required
2169 */
2170function media_get_token($id,$w,$h){
2171    // token is only required for modified images
2172    if ($w || $h || media_isexternal($id)) {
2173        $token = $id;
2174        if ($w) $token .= '.'.$w;
2175        if ($h) $token .= '.'.$h;
2176
2177        return substr(\dokuwiki\PassHash::hmac('md5', $token, auth_cookiesalt()),0,6);
2178    }
2179
2180    return '';
2181}
2182
2183/**
2184 * Download a remote file and return local filename
2185 *
2186 * returns false if download fails. Uses cached file if available and
2187 * wanted
2188 *
2189 * @author  Andreas Gohr <andi@splitbrain.org>
2190 * @author  Pavel Vitis <Pavel.Vitis@seznam.cz>
2191 *
2192 * @param string $url
2193 * @param string $ext   extension
2194 * @param int    $cache cachetime in seconds
2195 * @return false|string path to cached file
2196 */
2197function media_get_from_URL($url,$ext,$cache){
2198    global $conf;
2199
2200    // if no cache or fetchsize just redirect
2201    if ($cache==0)           return false;
2202    if (!$conf['fetchsize']) return false;
2203
2204    $local = getCacheName(strtolower($url),".media.$ext");
2205    $mtime = @filemtime($local); // 0 if not exists
2206
2207    //decide if download needed:
2208    if(($mtime == 0) || // cache does not exist
2209        ($cache != -1 && $mtime < time() - $cache) // 'recache' and cache has expired
2210    ) {
2211        if(media_image_download($url, $local)) {
2212            return $local;
2213        } else {
2214            return false;
2215        }
2216    }
2217
2218    //if cache exists use it else
2219    if($mtime) return $local;
2220
2221    //else return false
2222    return false;
2223}
2224
2225/**
2226 * Download image files
2227 *
2228 * @author Andreas Gohr <andi@splitbrain.org>
2229 *
2230 * @param string $url
2231 * @param string $file path to file in which to put the downloaded content
2232 * @return bool
2233 */
2234function media_image_download($url,$file){
2235    global $conf;
2236    $http = new DokuHTTPClient();
2237    $http->keep_alive = false; // we do single ops here, no need for keep-alive
2238
2239    $http->max_bodysize = $conf['fetchsize'];
2240    $http->timeout = 25; //max. 25 sec
2241    $http->header_regexp = '!\r\nContent-Type: image/(jpe?g|gif|png)!i';
2242
2243    $data = $http->get($url);
2244    if(!$data) return false;
2245
2246    $fileexists = file_exists($file);
2247    $fp = @fopen($file,"w");
2248    if(!$fp) return false;
2249    fwrite($fp,$data);
2250    fclose($fp);
2251    if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
2252
2253    // check if it is really an image
2254    $info = @getimagesize($file);
2255    if(!$info){
2256        @unlink($file);
2257        return false;
2258    }
2259
2260    return true;
2261}
2262
2263/**
2264 * resize images using external ImageMagick convert program
2265 *
2266 * @author Pavel Vitis <Pavel.Vitis@seznam.cz>
2267 * @author Andreas Gohr <andi@splitbrain.org>
2268 *
2269 * @param string $ext     extension
2270 * @param string $from    filename path to file
2271 * @param int    $from_w  original width
2272 * @param int    $from_h  original height
2273 * @param string $to      path to resized file
2274 * @param int    $to_w    desired width
2275 * @param int    $to_h    desired height
2276 * @return bool
2277 */
2278function media_resize_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h){
2279    global $conf;
2280
2281    // check if convert is configured
2282    if(!$conf['im_convert']) return false;
2283
2284    // prepare command
2285    $cmd  = $conf['im_convert'];
2286    $cmd .= ' -resize '.$to_w.'x'.$to_h.'!';
2287    if ($ext == 'jpg' || $ext == 'jpeg') {
2288        $cmd .= ' -quality '.$conf['jpg_quality'];
2289    }
2290    $cmd .= " $from $to";
2291
2292    @exec($cmd,$out,$retval);
2293    if ($retval == 0) return true;
2294    return false;
2295}
2296
2297/**
2298 * crop images using external ImageMagick convert program
2299 *
2300 * @author Andreas Gohr <andi@splitbrain.org>
2301 *
2302 * @param string $ext     extension
2303 * @param string $from    filename path to file
2304 * @param int    $from_w  original width
2305 * @param int    $from_h  original height
2306 * @param string $to      path to resized file
2307 * @param int    $to_w    desired width
2308 * @param int    $to_h    desired height
2309 * @param int    $ofs_x   offset of crop centre
2310 * @param int    $ofs_y   offset of crop centre
2311 * @return bool
2312 */
2313function media_crop_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x,$ofs_y){
2314    global $conf;
2315
2316    // check if convert is configured
2317    if(!$conf['im_convert']) return false;
2318
2319    // prepare command
2320    $cmd  = $conf['im_convert'];
2321    $cmd .= ' -crop '.$to_w.'x'.$to_h.'+'.$ofs_x.'+'.$ofs_y;
2322    if ($ext == 'jpg' || $ext == 'jpeg') {
2323        $cmd .= ' -quality '.$conf['jpg_quality'];
2324    }
2325    $cmd .= " $from $to";
2326
2327    @exec($cmd,$out,$retval);
2328    if ($retval == 0) return true;
2329    return false;
2330}
2331
2332/**
2333 * resize or crop images using PHP's libGD support
2334 *
2335 * @author Andreas Gohr <andi@splitbrain.org>
2336 * @author Sebastian Wienecke <s_wienecke@web.de>
2337 *
2338 * @param string $ext     extension
2339 * @param string $from    filename path to file
2340 * @param int    $from_w  original width
2341 * @param int    $from_h  original height
2342 * @param string $to      path to resized file
2343 * @param int    $to_w    desired width
2344 * @param int    $to_h    desired height
2345 * @param int    $ofs_x   offset of crop centre
2346 * @param int    $ofs_y   offset of crop centre
2347 * @return bool
2348 */
2349function media_resize_imageGD($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x=0,$ofs_y=0){
2350    global $conf;
2351
2352    if($conf['gdlib'] < 1) return false; //no GDlib available or wanted
2353
2354    // check available memory
2355    if(!is_mem_available(($from_w * $from_h * 4) + ($to_w * $to_h * 4))){
2356        return false;
2357    }
2358
2359    // create an image of the given filetype
2360    $image = false;
2361    if ($ext == 'jpg' || $ext == 'jpeg'){
2362        if(!function_exists("imagecreatefromjpeg")) return false;
2363        $image = @imagecreatefromjpeg($from);
2364    }elseif($ext == 'png') {
2365        if(!function_exists("imagecreatefrompng")) return false;
2366        $image = @imagecreatefrompng($from);
2367
2368    }elseif($ext == 'gif') {
2369        if(!function_exists("imagecreatefromgif")) return false;
2370        $image = @imagecreatefromgif($from);
2371    }
2372    if(!$image) return false;
2373
2374    $newimg = false;
2375    if(($conf['gdlib']>1) && function_exists("imagecreatetruecolor") && $ext != 'gif'){
2376        $newimg = @imagecreatetruecolor ($to_w, $to_h);
2377    }
2378    if(!$newimg) $newimg = @imagecreate($to_w, $to_h);
2379    if(!$newimg){
2380        imagedestroy($image);
2381        return false;
2382    }
2383
2384    //keep png alpha channel if possible
2385    if($ext == 'png' && $conf['gdlib']>1 && function_exists('imagesavealpha')){
2386        imagealphablending($newimg, false);
2387        imagesavealpha($newimg,true);
2388    }
2389
2390    //keep gif transparent color if possible
2391    if($ext == 'gif' && function_exists('imagefill') && function_exists('imagecolorallocate')) {
2392        if(function_exists('imagecolorsforindex') && function_exists('imagecolortransparent')) {
2393            $transcolorindex = @imagecolortransparent($image);
2394            if($transcolorindex >= 0 ) { //transparent color exists
2395                $transcolor = @imagecolorsforindex($image, $transcolorindex);
2396                $transcolorindex = @imagecolorallocate(
2397                    $newimg,
2398                    $transcolor['red'],
2399                    $transcolor['green'],
2400                    $transcolor['blue']
2401                );
2402                @imagefill($newimg, 0, 0, $transcolorindex);
2403                @imagecolortransparent($newimg, $transcolorindex);
2404            }else{ //filling with white
2405                $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2406                @imagefill($newimg, 0, 0, $whitecolorindex);
2407            }
2408        }else{ //filling with white
2409            $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2410            @imagefill($newimg, 0, 0, $whitecolorindex);
2411        }
2412    }
2413
2414    //try resampling first
2415    if(function_exists("imagecopyresampled")){
2416        if(!@imagecopyresampled($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h)) {
2417            imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2418        }
2419    }else{
2420        imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2421    }
2422
2423    $okay = false;
2424    if ($ext == 'jpg' || $ext == 'jpeg'){
2425        if(!function_exists('imagejpeg')){
2426            $okay = false;
2427        }else{
2428            $okay = imagejpeg($newimg, $to, $conf['jpg_quality']);
2429        }
2430    }elseif($ext == 'png') {
2431        if(!function_exists('imagepng')){
2432            $okay = false;
2433        }else{
2434            $okay =  imagepng($newimg, $to);
2435        }
2436    }elseif($ext == 'gif') {
2437        if(!function_exists('imagegif')){
2438            $okay = false;
2439        }else{
2440            $okay = imagegif($newimg, $to);
2441        }
2442    }
2443
2444    // destroy GD image ressources
2445    if($image) imagedestroy($image);
2446    if($newimg) imagedestroy($newimg);
2447
2448    return $okay;
2449}
2450
2451/**
2452 * Return other media files with the same base name
2453 * but different extensions.
2454 *
2455 * @param string   $src     - ID of media file
2456 * @param string[] $exts    - alternative extensions to find other files for
2457 * @return array            - array(mime type => file ID)
2458 *
2459 * @author Anika Henke <anika@selfthinker.org>
2460 */
2461function media_alternativefiles($src, $exts){
2462
2463    $files = array();
2464    list($srcExt, /* $srcMime */) = mimetype($src);
2465    $filebase = substr($src, 0, -1 * (strlen($srcExt)+1));
2466
2467    foreach($exts as $ext) {
2468        $fileid = $filebase.'.'.$ext;
2469        $file = mediaFN($fileid);
2470        if(file_exists($file)) {
2471            list(/* $fileExt */, $fileMime) = mimetype($file);
2472            $files[$fileMime] = $fileid;
2473        }
2474    }
2475    return $files;
2476}
2477
2478/**
2479 * Check if video/audio is supported to be embedded.
2480 *
2481 * @param string $mime      - mimetype of media file
2482 * @param string $type      - type of media files to check ('video', 'audio', or null for all)
2483 * @return boolean
2484 *
2485 * @author Anika Henke <anika@selfthinker.org>
2486 */
2487function media_supportedav($mime, $type=NULL){
2488    $supportedAudio = array(
2489        'ogg' => 'audio/ogg',
2490        'mp3' => 'audio/mpeg',
2491        'wav' => 'audio/wav',
2492    );
2493    $supportedVideo = array(
2494        'webm' => 'video/webm',
2495        'ogv' => 'video/ogg',
2496        'mp4' => 'video/mp4',
2497    );
2498    if ($type == 'audio') {
2499        $supportedAv = $supportedAudio;
2500    } elseif ($type == 'video') {
2501        $supportedAv = $supportedVideo;
2502    } else {
2503        $supportedAv = array_merge($supportedAudio, $supportedVideo);
2504    }
2505    return in_array($mime, $supportedAv);
2506}
2507
2508/**
2509 * Return track media files with the same base name
2510 * but extensions that indicate kind and lang.
2511 * ie for foo.webm search foo.sub.lang.vtt, foo.cap.lang.vtt...
2512 *
2513 * @param string   $src     - ID of media file
2514 * @return array            - array(mediaID => array( kind, srclang ))
2515 *
2516 * @author Schplurtz le Déboulonné <Schplurtz@laposte.net>
2517 */
2518function media_trackfiles($src){
2519    $kinds=array(
2520        'sub' => 'subtitles',
2521        'cap' => 'captions',
2522        'des' => 'descriptions',
2523        'cha' => 'chapters',
2524        'met' => 'metadata'
2525    );
2526
2527    $files = array();
2528    $re='/\\.(sub|cap|des|cha|met)\\.([^.]+)\\.vtt$/';
2529    $baseid=pathinfo($src, PATHINFO_FILENAME);
2530    $pattern=mediaFN($baseid).'.*.*.vtt';
2531    $list=glob($pattern);
2532    foreach($list as $track) {
2533        if(preg_match($re, $track, $matches)){
2534            $files[$baseid.'.'.$matches[1].'.'.$matches[2].'.vtt']=array(
2535                $kinds[$matches[1]],
2536                $matches[2],
2537            );
2538        }
2539    }
2540    return $files;
2541}
2542
2543/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
2544