xref: /dokuwiki/inc/media.php (revision 3409ba76d3dce34bc631c6bf42be3bc0e1444323) 
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;
10
11/**
12 * Lists pages which currently use a media file selected for deletion
13 *
14 * References uses the same visual as search results and share
15 * their CSS tags except pagenames won't be links.
16 *
17 * @author Matthias Grimm <matthiasgrimm@users.sourceforge.net>
18 *
19 * @param array $data
20 * @param string $id
21 */
22function media_filesinuse($data,$id){
23    global $lang;
24    echo '<h1>'.$lang['reference'].' <code>'.hsc(noNS($id)).'</code></h1>';
25    echo '<p>'.hsc($lang['ref_inuse']).'</p>';
26
27    $hidden=0; //count of hits without read permission
28    foreach($data as $row){
29        if(auth_quickaclcheck($row) >= AUTH_READ && isVisiblePage($row)){
30            echo '<div class="search_result">';
31            echo '<span class="mediaref_ref">'.hsc($row).'</span>';
32            echo '</div>';
33        }else
34            $hidden++;
35    }
36    if ($hidden){
37        print '<div class="mediaref_hidden">'.$lang['ref_hidden'].'</div>';
38    }
39}
40
41/**
42 * Handles the saving of image meta data
43 *
44 * @author Andreas Gohr <andi@splitbrain.org>
45 * @author Kate Arzamastseva <pshns@ukr.net>
46 *
47 * @param string $id media id
48 * @param int $auth permission level
49 * @param array $data
50 * @return false|string
51 */
52function media_metasave($id,$auth,$data){
53    if($auth < AUTH_UPLOAD) return false;
54    if(!checkSecurityToken()) return false;
55    global $lang;
56    global $conf;
57    $src = mediaFN($id);
58
59    $meta = new JpegMeta($src);
60    $meta->_parseAll();
61
62    foreach($data as $key => $val){
63        $val=trim($val);
64        if(empty($val)){
65            $meta->deleteField($key);
66        }else{
67            $meta->setField($key,$val);
68        }
69    }
70
71    $old = @filemtime($src);
72    if(!file_exists(mediaFN($id, $old)) && file_exists($src)) {
73        // add old revision to the attic
74        media_saveOldRevision($id);
75    }
76    $filesize_old = filesize($src);
77    if($meta->save()){
78        if($conf['fperm']) chmod($src, $conf['fperm']);
79        @clearstatcache(true, $src);
80        $new = @filemtime($src);
81        $filesize_new = filesize($src);
82        $sizechange = $filesize_new - $filesize_old;
83
84        // add a log entry to the media changelog
85        addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT, $lang['media_meta_edited'], '', null, $sizechange);
86
87        msg($lang['metasaveok'],1);
88        return $id;
89    }else{
90        msg($lang['metasaveerr'],-1);
91        return false;
92    }
93}
94
95/**
96 * check if a media is external source
97 *
98 * @author Gerrit Uitslag <klapinklapin@gmail.com>
99 *
100 * @param string $id the media ID or URL
101 * @return bool
102 */
103function media_isexternal($id){
104    if (preg_match('#^(?:https?|ftp)://#i', $id)) return true;
105    return false;
106}
107
108/**
109 * Check if a media item is public (eg, external URL or readable by @ALL)
110 *
111 * @author Andreas Gohr <andi@splitbrain.org>
112 *
113 * @param string $id  the media ID or URL
114 * @return bool
115 */
116function media_ispublic($id){
117    if(media_isexternal($id)) return true;
118    $id = cleanID($id);
119    if(auth_aclcheck(getNS($id).':*', '', array()) >= AUTH_READ) return true;
120    return false;
121}
122
123/**
124 * Display the form to edit image meta data
125 *
126 * @author Andreas Gohr <andi@splitbrain.org>
127 * @author Kate Arzamastseva <pshns@ukr.net>
128 *
129 * @param string $id media id
130 * @param int $auth permission level
131 * @return bool
132 */
133function media_metaform($id,$auth){
134    global $lang;
135
136    if($auth < AUTH_UPLOAD) {
137        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.NL;
138        return false;
139    }
140
141    // load the field descriptions
142    static $fields = null;
143    if(is_null($fields)){
144        $config_files = getConfigFiles('mediameta');
145        foreach ($config_files as $config_file) {
146            if(file_exists($config_file)) include($config_file);
147        }
148    }
149
150    $src = mediaFN($id);
151
152    // output
153    $form = new Doku_Form(array('action' => media_managerURL(array('tab_details' => 'view'), '&'),
154                                'class' => 'meta'));
155    $form->addHidden('img', $id);
156    $form->addHidden('mediado', 'save');
157    foreach($fields as $key => $field){
158        // get current value
159        if (empty($field[0])) continue;
160        $tags = array($field[0]);
161        if(is_array($field[3])) $tags = array_merge($tags,$field[3]);
162        $value = tpl_img_getTag($tags,'',$src);
163        $value = cleanText($value);
164
165        // prepare attributes
166        $p = array();
167        $p['class'] = 'edit';
168        $p['id']    = 'meta__'.$key;
169        $p['name']  = 'meta['.$field[0].']';
170        $p_attrs    = array('class' => 'edit');
171
172        $form->addElement('<div class="row">');
173        if($field[2] == 'text'){
174            $form->addElement(
175                form_makeField(
176                    'text',
177                    $p['name'],
178                    $value,
179                    ($lang[$field[1]]) ? $lang[$field[1]] : $field[1] . ':',
180                    $p['id'],
181                    $p['class'],
182                    $p_attrs
183                )
184            );
185        }else{
186            $att = buildAttributes($p);
187            $form->addElement('<label for="meta__'.$key.'">'.$lang[$field[1]].'</label>');
188            $form->addElement("<textarea $att rows=\"6\" cols=\"50\">".formText($value).'</textarea>');
189        }
190        $form->addElement('</div>'.NL);
191    }
192    $form->addElement('<div class="buttons">');
193    $form->addElement(
194        form_makeButton(
195            'submit',
196            '',
197            $lang['btn_save'],
198            array('accesskey' => 's', 'name' => 'mediado[save]')
199        )
200    );
201    $form->addElement('</div>'.NL);
202    $form->printForm();
203
204    return true;
205}
206
207/**
208 * Convenience function to check if a media file is still in use
209 *
210 * @author Michael Klier <chi@chimeric.de>
211 *
212 * @param string $id media id
213 * @return array|bool
214 */
215function media_inuse($id) {
216    global $conf;
217
218    if($conf['refcheck']){
219        $mediareferences = ft_mediause($id,true);
220        if(!count($mediareferences)) {
221            return false;
222        } else {
223            return $mediareferences;
224        }
225    } else {
226        return false;
227    }
228}
229
230define('DOKU_MEDIA_DELETED', 1);
231define('DOKU_MEDIA_NOT_AUTH', 2);
232define('DOKU_MEDIA_INUSE', 4);
233define('DOKU_MEDIA_EMPTY_NS', 8);
234
235/**
236 * Handles media file deletions
237 *
238 * If configured, checks for media references before deletion
239 *
240 * @author             Andreas Gohr <andi@splitbrain.org>
241 *
242 * @param string $id media id
243 * @param int $auth no longer used
244 * @return int One of: 0,
245 *                     DOKU_MEDIA_DELETED,
246 *                     DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS,
247 *                     DOKU_MEDIA_NOT_AUTH,
248 *                     DOKU_MEDIA_INUSE
249 */
250function media_delete($id,$auth){
251    global $lang;
252    $auth = auth_quickaclcheck(ltrim(getNS($id).':*', ':'));
253    if($auth < AUTH_DELETE) return DOKU_MEDIA_NOT_AUTH;
254    if(media_inuse($id)) return DOKU_MEDIA_INUSE;
255
256    $file = mediaFN($id);
257
258    // trigger an event - MEDIA_DELETE_FILE
259    $data = array();
260    $data['id']   = $id;
261    $data['name'] = utf8_basename($file);
262    $data['path'] = $file;
263    $data['size'] = (file_exists($file)) ? filesize($file) : 0;
264
265    $data['unl'] = false;
266    $data['del'] = false;
267    $evt = new Doku_Event('MEDIA_DELETE_FILE',$data);
268    if ($evt->advise_before()) {
269        $old = @filemtime($file);
270        if(!file_exists(mediaFN($id, $old)) && file_exists($file)) {
271            // add old revision to the attic
272            media_saveOldRevision($id);
273        }
274
275        $data['unl'] = @unlink($file);
276        if($data['unl']) {
277            $sizechange = 0 - $data['size'];
278            addMediaLogEntry(time(), $id, DOKU_CHANGE_TYPE_DELETE, $lang['deleted'], '', null, $sizechange);
279
280            $data['del'] = io_sweepNS($id, 'mediadir');
281        }
282    }
283    $evt->advise_after();
284    unset($evt);
285
286    if($data['unl'] && $data['del']){
287        return DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS;
288    }
289
290    return $data['unl'] ? DOKU_MEDIA_DELETED : 0;
291}
292
293/**
294 * Handle file uploads via XMLHttpRequest
295 *
296 * @param string $ns   target namespace
297 * @param int    $auth current auth check result
298 * @return false|string false on error, id of the new file on success
299 */
300function media_upload_xhr($ns,$auth){
301    if(!checkSecurityToken()) return false;
302    global $INPUT;
303
304    $id = $INPUT->get->str('qqfile');
305    list($ext,$mime) = mimetype($id);
306    $input = fopen("php://input", "r");
307    if (!($tmp = io_mktmpdir())) return false;
308    $path = $tmp.'/'.md5($id);
309    $target = fopen($path, "w");
310    $realSize = stream_copy_to_stream($input, $target);
311    fclose($target);
312    fclose($input);
313    if (isset($_SERVER["CONTENT_LENGTH"]) && ($realSize != (int)$_SERVER["CONTENT_LENGTH"])){
314        unlink($path);
315        return false;
316    }
317
318    $res = media_save(
319        array('name' => $path,
320            'mime' => $mime,
321            'ext'  => $ext),
322        $ns.':'.$id,
323        (($INPUT->get->str('ow') == 'true') ? true : false),
324        $auth,
325        'copy'
326    );
327    unlink($path);
328    if ($tmp) io_rmdir($tmp, true);
329    if (is_array($res)) {
330        msg($res[0], $res[1]);
331        return false;
332    }
333    return $res;
334}
335
336/**
337 * Handles media file uploads
338 *
339 * @author Andreas Gohr <andi@splitbrain.org>
340 * @author Michael Klier <chi@chimeric.de>
341 *
342 * @param string     $ns    target namespace
343 * @param int        $auth  current auth check result
344 * @param bool|array $file  $_FILES member, $_FILES['upload'] if false
345 * @return false|string false on error, id of the new file on success
346 */
347function media_upload($ns,$auth,$file=false){
348    if(!checkSecurityToken()) return false;
349    global $lang;
350    global $INPUT;
351
352    // get file and id
353    $id   = $INPUT->post->str('mediaid');
354    if (!$file) $file = $_FILES['upload'];
355    if(empty($id)) $id = $file['name'];
356
357    // check for errors (messages are done in lib/exe/mediamanager.php)
358    if($file['error']) return false;
359
360    // check extensions
361    list($fext,$fmime) = mimetype($file['name']);
362    list($iext,$imime) = mimetype($id);
363    if($fext && !$iext){
364        // no extension specified in id - read original one
365        $id   .= '.'.$fext;
366        $imime = $fmime;
367    }elseif($fext && $fext != $iext){
368        // extension was changed, print warning
369        msg(sprintf($lang['mediaextchange'],$fext,$iext));
370    }
371
372    $res = media_save(array('name' => $file['tmp_name'],
373                            'mime' => $imime,
374                            'ext'  => $iext), $ns.':'.$id,
375                      $INPUT->post->bool('ow'), $auth, 'copy_uploaded_file');
376    if (is_array($res)) {
377        msg($res[0], $res[1]);
378        return false;
379    }
380    return $res;
381}
382
383/**
384 * An alternative to move_uploaded_file that copies
385 *
386 * Using copy, makes sure any setgid bits on the media directory are honored
387 *
388 * @see   move_uploaded_file()
389 *
390 * @param string $from
391 * @param string $to
392 * @return bool
393 */
394function copy_uploaded_file($from, $to){
395    if(!is_uploaded_file($from)) return false;
396    $ok = copy($from, $to);
397    @unlink($from);
398    return $ok;
399}
400
401/**
402 * This generates an action event and delegates to _media_upload_action().
403 * Action plugins are allowed to pre/postprocess the uploaded file.
404 * (The triggered event is preventable.)
405 *
406 * Event data:
407 * $data[0]     fn_tmp:    the temporary file name (read from $_FILES)
408 * $data[1]     fn:        the file name of the uploaded file
409 * $data[2]     id:        the future directory id of the uploaded file
410 * $data[3]     imime:     the mimetype of the uploaded file
411 * $data[4]     overwrite: if an existing file is going to be overwritten
412 * $data[5]     move:      name of function that performs move/copy/..
413 *
414 * @triggers MEDIA_UPLOAD_FINISH
415 *
416 * @param array  $file
417 * @param string $id   media id
418 * @param bool   $ow   overwrite?
419 * @param int    $auth permission level
420 * @param string $move name of functions that performs move/copy/..
421 * @return false|array|string
422 */
423function media_save($file, $id, $ow, $auth, $move) {
424    if($auth < AUTH_UPLOAD) {
425        return array("You don't have permissions to upload files.", -1);
426    }
427
428    if (!isset($file['mime']) || !isset($file['ext'])) {
429        list($ext, $mime) = mimetype($id);
430        if (!isset($file['mime'])) {
431            $file['mime'] = $mime;
432        }
433        if (!isset($file['ext'])) {
434            $file['ext'] = $ext;
435        }
436    }
437
438    global $lang, $conf;
439
440    // get filename
441    $id   = cleanID($id);
442    $fn   = mediaFN($id);
443
444    // get filetype regexp
445    $types = array_keys(getMimeTypes());
446    $types = array_map(
447        function ($q) {
448            return preg_quote($q, "/");
449        },
450        $types
451    );
452    $regex = join('|',$types);
453
454    // because a temp file was created already
455    if(!preg_match('/\.('.$regex.')$/i',$fn)) {
456        return array($lang['uploadwrong'],-1);
457    }
458
459    //check for overwrite
460    $overwrite = file_exists($fn);
461    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
462    if($overwrite && (!$ow || $auth < $auth_ow)) {
463        return array($lang['uploadexist'], 0);
464    }
465    // check for valid content
466    $ok = media_contentcheck($file['name'], $file['mime']);
467    if($ok == -1){
468        return array(sprintf($lang['uploadbadcontent'],'.' . $file['ext']),-1);
469    }elseif($ok == -2){
470        return array($lang['uploadspam'],-1);
471    }elseif($ok == -3){
472        return array($lang['uploadxss'],-1);
473    }
474
475    // prepare event data
476    $data = array();
477    $data[0] = $file['name'];
478    $data[1] = $fn;
479    $data[2] = $id;
480    $data[3] = $file['mime'];
481    $data[4] = $overwrite;
482    $data[5] = $move;
483
484    // trigger event
485    return trigger_event('MEDIA_UPLOAD_FINISH', $data, '_media_upload_action', true);
486}
487
488/**
489 * Callback adapter for media_upload_finish() triggered by MEDIA_UPLOAD_FINISH
490 *
491 * @author Michael Klier <chi@chimeric.de>
492 *
493 * @param array $data event data
494 * @return false|array|string
495 */
496function _media_upload_action($data) {
497    // fixme do further sanity tests of given data?
498    if(is_array($data) && count($data)===6) {
499        return media_upload_finish($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
500    } else {
501        return false; //callback error
502    }
503}
504
505/**
506 * Saves an uploaded media file
507 *
508 * @author Andreas Gohr <andi@splitbrain.org>
509 * @author Michael Klier <chi@chimeric.de>
510 * @author Kate Arzamastseva <pshns@ukr.net>
511 *
512 * @param string $fn_tmp
513 * @param string $fn
514 * @param string $id        media id
515 * @param string $imime     mime type
516 * @param bool   $overwrite overwrite existing?
517 * @param string $move      function name
518 * @return array|string
519 */
520function media_upload_finish($fn_tmp, $fn, $id, $imime, $overwrite, $move = 'move_uploaded_file') {
521    global $conf;
522    global $lang;
523    global $REV;
524
525    $old = @filemtime($fn);
526    if(!file_exists(mediaFN($id, $old)) && file_exists($fn)) {
527        // add old revision to the attic if missing
528        media_saveOldRevision($id);
529    }
530
531    // prepare directory
532    io_createNamespace($id, 'media');
533
534    $filesize_old = file_exists($fn) ? filesize($fn) : 0;
535
536    if($move($fn_tmp, $fn)) {
537        @clearstatcache(true,$fn);
538        $new = @filemtime($fn);
539        // Set the correct permission here.
540        // Always chmod media because they may be saved with different permissions than expected from the php umask.
541        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
542        chmod($fn, $conf['fmode']);
543        msg($lang['uploadsucc'],1);
544        media_notify($id,$fn,$imime,$old);
545        // add a log entry to the media changelog
546        $filesize_new = filesize($fn);
547        $sizechange = $filesize_new - $filesize_old;
548        if($REV) {
549            addMediaLogEntry(
550                $new,
551                $id,
552                DOKU_CHANGE_TYPE_REVERT,
553                sprintf($lang['restored'], dformat($REV)),
554                $REV,
555                null,
556                $sizechange
557            );
558        } elseif($overwrite) {
559            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT, '', '', null, $sizechange);
560        } else {
561            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created'], '', null, $sizechange);
562        }
563        return $id;
564    }else{
565        return array($lang['uploadfail'],-1);
566    }
567}
568
569/**
570 * Moves the current version of media file to the media_attic
571 * directory
572 *
573 * @author Kate Arzamastseva <pshns@ukr.net>
574 *
575 * @param string $id
576 * @return int - revision date
577 */
578function media_saveOldRevision($id){
579    global $conf, $lang;
580
581    $oldf = mediaFN($id);
582    if(!file_exists($oldf)) return '';
583    $date = filemtime($oldf);
584    if (!$conf['mediarevisions']) return $date;
585
586    $medialog = new MediaChangeLog($id);
587    if (!$medialog->getRevisionInfo($date)) {
588        // there was an external edit,
589        // there is no log entry for current version of file
590        $sizechange = filesize($oldf);
591        if(!file_exists(mediaMetaFN($id, '.changes'))) {
592            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created'], '', null, $sizechange);
593        } else {
594            $oldRev = $medialog->getRevisions(-1, 1); // from changelog
595            $oldRev = (int) (empty($oldRev) ? 0 : $oldRev[0]);
596            $filesize_old = filesize(mediaFN($id, $oldRev));
597            $sizechange = $sizechange - $filesize_old;
598
599            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_EDIT, '', '', null, $sizechange);
600        }
601    }
602
603    $newf = mediaFN($id,$date);
604    io_makeFileDir($newf);
605    if(copy($oldf, $newf)) {
606        // Set the correct permission here.
607        // Always chmod media because they may be saved with different permissions than expected from the php umask.
608        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
609        chmod($newf, $conf['fmode']);
610    }
611    return $date;
612}
613
614/**
615 * This function checks if the uploaded content is really what the
616 * mimetype says it is. We also do spam checking for text types here.
617 *
618 * We need to do this stuff because we can not rely on the browser
619 * to do this check correctly. Yes, IE is broken as usual.
620 *
621 * @author Andreas Gohr <andi@splitbrain.org>
622 * @link   http://www.splitbrain.org/blog/2007-02/12-internet_explorer_facilitates_cross_site_scripting
623 * @fixme  check all 26 magic IE filetypes here?
624 *
625 * @param string $file path to file
626 * @param string $mime mimetype
627 * @return int
628 */
629function media_contentcheck($file,$mime){
630    global $conf;
631    if($conf['iexssprotect']){
632        $fh = @fopen($file, 'rb');
633        if($fh){
634            $bytes = fread($fh, 256);
635            fclose($fh);
636            if(preg_match('/<(script|a|img|html|body|iframe)[\s>]/i',$bytes)){
637                return -3; //XSS: possibly malicious content
638            }
639        }
640    }
641    if(substr($mime,0,6) == 'image/'){
642        $info = @getimagesize($file);
643        if($mime == 'image/gif' && $info[2] != 1){
644            return -1; // uploaded content did not match the file extension
645        }elseif($mime == 'image/jpeg' && $info[2] != 2){
646            return -1;
647        }elseif($mime == 'image/png' && $info[2] != 3){
648            return -1;
649        }
650        # fixme maybe check other images types as well
651    }elseif(substr($mime,0,5) == 'text/'){
652        global $TEXT;
653        $TEXT = io_readFile($file);
654        if(checkwordblock()){
655            return -2; //blocked by the spam blacklist
656        }
657    }
658    return 0;
659}
660
661/**
662 * Send a notify mail on uploads
663 *
664 * @author Andreas Gohr <andi@splitbrain.org>
665 *
666 * @param string   $id      media id
667 * @param string   $file    path to file
668 * @param string   $mime    mime type
669 * @param bool|int $old_rev revision timestamp or false
670 * @return bool
671 */
672function media_notify($id,$file,$mime,$old_rev=false){
673    global $conf;
674    if(empty($conf['notify'])) return false; //notify enabled?
675
676    $subscription = new Subscription();
677    return $subscription->send_media_diff($conf['notify'], 'uploadmail', $id, $old_rev);
678}
679
680/**
681 * List all files in a given Media namespace
682 *
683 * @param string      $ns             namespace
684 * @param null|int    $auth           permission level
685 * @param string      $jump           id
686 * @param bool        $fullscreenview
687 * @param bool|string $sort           sorting order, false skips sorting
688 */
689function media_filelist($ns,$auth=null,$jump='',$fullscreenview=false,$sort=false){
690    global $conf;
691    global $lang;
692    $ns = cleanID($ns);
693
694    // check auth our self if not given (needed for ajax calls)
695    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
696
697    if (!$fullscreenview) echo '<h1 id="media__ns">:'.hsc($ns).'</h1>'.NL;
698
699    if($auth < AUTH_READ){
700        // FIXME: print permission warning here instead?
701        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
702    }else{
703        if (!$fullscreenview) {
704            media_uploadform($ns, $auth);
705            media_searchform($ns);
706        }
707
708        $dir = utf8_encodeFN(str_replace(':','/',$ns));
709        $data = array();
710        search($data,$conf['mediadir'],'search_media',
711                array('showmsg'=>true,'depth'=>1),$dir,1,$sort);
712
713        if(!count($data)){
714            echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
715        }else {
716            if ($fullscreenview) {
717                echo '<ul class="' . _media_get_list_type() . '">';
718            }
719            foreach($data as $item){
720                if (!$fullscreenview) {
721                    media_printfile($item,$auth,$jump);
722                } else {
723                    media_printfile_thumbs($item,$auth,$jump);
724                }
725            }
726            if ($fullscreenview) echo '</ul>'.NL;
727        }
728    }
729}
730
731/**
732 * Prints tabs for files list actions
733 *
734 * @author Kate Arzamastseva <pshns@ukr.net>
735 * @author Adrian Lang <mail@adrianlang.de>
736 *
737 * @param string $selected_tab - opened tab
738 */
739
740function media_tabs_files($selected_tab = ''){
741    global $lang;
742    $tabs = array();
743    foreach(array('files'  => 'mediaselect',
744                  'upload' => 'media_uploadtab',
745                  'search' => 'media_searchtab') as $tab => $caption) {
746        $tabs[$tab] = array('href'    => media_managerURL(array('tab_files' => $tab), '&'),
747                            'caption' => $lang[$caption]);
748    }
749
750    html_tabs($tabs, $selected_tab);
751}
752
753/**
754 * Prints tabs for files details actions
755 *
756 * @author Kate Arzamastseva <pshns@ukr.net>
757 * @param string $image filename of the current image
758 * @param string $selected_tab opened tab
759 */
760function media_tabs_details($image, $selected_tab = ''){
761    global $lang, $conf;
762
763    $tabs = array();
764    $tabs['view'] = array('href'    => media_managerURL(array('tab_details' => 'view'), '&'),
765                          'caption' => $lang['media_viewtab']);
766
767    list(, $mime) = mimetype($image);
768    if ($mime == 'image/jpeg' && file_exists(mediaFN($image))) {
769        $tabs['edit'] = array('href'    => media_managerURL(array('tab_details' => 'edit'), '&'),
770                              'caption' => $lang['media_edittab']);
771    }
772    if ($conf['mediarevisions']) {
773        $tabs['history'] = array('href'    => media_managerURL(array('tab_details' => 'history'), '&'),
774                                 'caption' => $lang['media_historytab']);
775    }
776
777    html_tabs($tabs, $selected_tab);
778}
779
780/**
781 * Prints options for the tab that displays a list of all files
782 *
783 * @author Kate Arzamastseva <pshns@ukr.net>
784 */
785function media_tab_files_options(){
786    global $lang;
787    global $INPUT;
788    global $ID;
789    $form = new Doku_Form(array('class' => 'options', 'method' => 'get',
790                                'action' => wl($ID)));
791    $media_manager_params = media_managerURL(array(), '', false, true);
792    foreach($media_manager_params as $pKey => $pVal){
793        $form->addHidden($pKey, $pVal);
794    }
795    $form->addHidden('sectok', null);
796    if ($INPUT->has('q')) {
797        $form->addHidden('q', $INPUT->str('q'));
798    }
799    $form->addElement('<ul>'.NL);
800    foreach(array('list' => array('listType', array('thumbs', 'rows')),
801                  'sort' => array('sortBy', array('name', 'date')))
802            as $group => $content) {
803        $checked = "_media_get_${group}_type";
804        $checked = $checked();
805
806        $form->addElement('<li class="' . $content[0] . '">');
807        foreach($content[1] as $option) {
808            $attrs = array();
809            if ($checked == $option) {
810                $attrs['checked'] = 'checked';
811            }
812            $form->addElement(form_makeRadioField($group . '_dwmedia', $option,
813                                       $lang['media_' . $group . '_' . $option],
814                                                  $content[0] . '__' . $option,
815                                                  $option, $attrs));
816        }
817        $form->addElement('</li>'.NL);
818    }
819    $form->addElement('<li>');
820    $form->addElement(form_makeButton('submit', '', $lang['btn_apply']));
821    $form->addElement('</li>'.NL);
822    $form->addElement('</ul>'.NL);
823    $form->printForm();
824}
825
826/**
827 * Returns type of sorting for the list of files in media manager
828 *
829 * @author Kate Arzamastseva <pshns@ukr.net>
830 *
831 * @return string - sort type
832 */
833function _media_get_sort_type() {
834    return _media_get_display_param('sort', array('default' => 'name', 'date'));
835}
836
837/**
838 * Returns type of listing for the list of files in media manager
839 *
840 * @author Kate Arzamastseva <pshns@ukr.net>
841 *
842 * @return string - list type
843 */
844function _media_get_list_type() {
845    return _media_get_display_param('list', array('default' => 'thumbs', 'rows'));
846}
847
848/**
849 * Get display parameters
850 *
851 * @param string $param   name of parameter
852 * @param array  $values  allowed values, where default value has index key 'default'
853 * @return string the parameter value
854 */
855function _media_get_display_param($param, $values) {
856    global $INPUT;
857    if (in_array($INPUT->str($param), $values)) {
858        // FIXME: Set cookie
859        return $INPUT->str($param);
860    } else {
861        $val = get_doku_pref($param, $values['default']);
862        if (!in_array($val, $values)) {
863            $val = $values['default'];
864        }
865        return $val;
866    }
867}
868
869/**
870 * Prints tab that displays a list of all files
871 *
872 * @author Kate Arzamastseva <pshns@ukr.net>
873 *
874 * @param string    $ns
875 * @param null|int  $auth permission level
876 * @param string    $jump item id
877 */
878function media_tab_files($ns,$auth=null,$jump='') {
879    global $lang;
880    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
881
882    if($auth < AUTH_READ){
883        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
884    }else{
885        media_filelist($ns,$auth,$jump,true,_media_get_sort_type());
886    }
887}
888
889/**
890 * Prints tab that displays uploading form
891 *
892 * @author Kate Arzamastseva <pshns@ukr.net>
893 *
894 * @param string   $ns
895 * @param null|int $auth permission level
896 * @param string   $jump item id
897 */
898function media_tab_upload($ns,$auth=null,$jump='') {
899    global $lang;
900    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
901
902    echo '<div class="upload">'.NL;
903    if ($auth >= AUTH_UPLOAD) {
904        echo '<p>' . $lang['mediaupload'] . '</p>';
905    }
906    media_uploadform($ns, $auth, true);
907    echo '</div>'.NL;
908}
909
910/**
911 * Prints tab that displays search form
912 *
913 * @author Kate Arzamastseva <pshns@ukr.net>
914 *
915 * @param string $ns
916 * @param null|int $auth permission level
917 */
918function media_tab_search($ns,$auth=null) {
919    global $INPUT;
920
921    $do = $INPUT->str('mediado');
922    $query = $INPUT->str('q');
923    echo '<div class="search">'.NL;
924
925    media_searchform($ns, $query, true);
926    if ($do == 'searchlist' || $query) {
927        media_searchlist($query,$ns,$auth,true,_media_get_sort_type());
928    }
929    echo '</div>'.NL;
930}
931
932/**
933 * Prints tab that displays mediafile details
934 *
935 * @author Kate Arzamastseva <pshns@ukr.net>
936 *
937 * @param string     $image media id
938 * @param string     $ns
939 * @param null|int   $auth  permission level
940 * @param string|int $rev   revision timestamp or empty string
941 */
942function media_tab_view($image, $ns, $auth=null, $rev='') {
943    global $lang;
944    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
945
946    if ($image && $auth >= AUTH_READ) {
947        $meta = new JpegMeta(mediaFN($image, $rev));
948        media_preview($image, $auth, $rev, $meta);
949        media_preview_buttons($image, $auth, $rev);
950        media_details($image, $auth, $rev, $meta);
951
952    } else {
953        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
954    }
955}
956
957/**
958 * Prints tab that displays form for editing mediafile metadata
959 *
960 * @author Kate Arzamastseva <pshns@ukr.net>
961 *
962 * @param string     $image media id
963 * @param string     $ns
964 * @param null|int   $auth permission level
965 */
966function media_tab_edit($image, $ns, $auth=null) {
967    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
968
969    if ($image) {
970        list(, $mime) = mimetype($image);
971        if ($mime == 'image/jpeg') media_metaform($image,$auth);
972    }
973}
974
975/**
976 * Prints tab that displays mediafile revisions
977 *
978 * @author Kate Arzamastseva <pshns@ukr.net>
979 *
980 * @param string     $image media id
981 * @param string     $ns
982 * @param null|int   $auth permission level
983 */
984function media_tab_history($image, $ns, $auth=null) {
985    global $lang;
986    global $INPUT;
987
988    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
989    $do = $INPUT->str('mediado');
990
991    if ($auth >= AUTH_READ && $image) {
992        if ($do == 'diff'){
993            media_diff($image, $ns, $auth);
994        } else {
995            $first = $INPUT->int('first');
996            html_revisions($first, $image);
997        }
998    } else {
999        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
1000    }
1001}
1002
1003/**
1004 * Prints mediafile details
1005 *
1006 * @param string         $image media id
1007 * @param int            $auth permission level
1008 * @param int|string     $rev revision timestamp or empty string
1009 * @param JpegMeta|bool  $meta
1010 *
1011 * @author Kate Arzamastseva <pshns@ukr.net>
1012 */
1013function media_preview($image, $auth, $rev='', $meta=false) {
1014
1015    $size = media_image_preview_size($image, $rev, $meta);
1016
1017    if ($size) {
1018        global $lang;
1019        echo '<div class="image">';
1020
1021        $more = array();
1022        if ($rev) {
1023            $more['rev'] = $rev;
1024        } else {
1025            $t = @filemtime(mediaFN($image));
1026            $more['t'] = $t;
1027        }
1028
1029        $more['w'] = $size[0];
1030        $more['h'] = $size[1];
1031        $src = ml($image, $more);
1032
1033        echo '<a href="'.$src.'" target="_blank" title="'.$lang['mediaview'].'">';
1034        echo '<img src="'.$src.'" alt="" style="max-width: '.$size[0].'px;" />';
1035        echo '</a>';
1036
1037        echo '</div>'.NL;
1038    }
1039}
1040
1041/**
1042 * Prints mediafile action buttons
1043 *
1044 * @author Kate Arzamastseva <pshns@ukr.net>
1045 *
1046 * @param string     $image media id
1047 * @param int        $auth  permission level
1048 * @param string|int $rev   revision timestamp, or empty string
1049 */
1050function media_preview_buttons($image, $auth, $rev='') {
1051    global $lang, $conf;
1052
1053    echo '<ul class="actions">'.NL;
1054
1055    if($auth >= AUTH_DELETE && !$rev && file_exists(mediaFN($image))){
1056
1057        // delete button
1058        $form = new Doku_Form(array('id' => 'mediamanager__btn_delete',
1059            'action'=>media_managerURL(array('delete' => $image), '&')));
1060        $form->addElement(form_makeButton('submit','',$lang['btn_delete']));
1061        echo '<li>';
1062        $form->printForm();
1063        echo '</li>'.NL;
1064    }
1065
1066    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1067    if($auth >= $auth_ow && !$rev){
1068
1069        // upload new version button
1070        $form = new Doku_Form(array('id' => 'mediamanager__btn_update',
1071            'action'=>media_managerURL(array('image' => $image, 'mediado' => 'update'), '&')));
1072        $form->addElement(form_makeButton('submit','',$lang['media_update']));
1073        echo '<li>';
1074        $form->printForm();
1075        echo '</li>'.NL;
1076    }
1077
1078    if($auth >= AUTH_UPLOAD && $rev && $conf['mediarevisions'] && file_exists(mediaFN($image, $rev))){
1079
1080        // restore button
1081        $form = new Doku_Form(array('id' => 'mediamanager__btn_restore',
1082            'action'=>media_managerURL(array('image' => $image), '&')));
1083        $form->addHidden('mediado','restore');
1084        $form->addHidden('rev',$rev);
1085        $form->addElement(form_makeButton('submit','',$lang['media_restore']));
1086        echo '<li>';
1087        $form->printForm();
1088        echo '</li>'.NL;
1089    }
1090
1091    echo '</ul>'.NL;
1092}
1093
1094/**
1095 * Returns image width and height for mediamanager preview panel
1096 *
1097 * @author Kate Arzamastseva <pshns@ukr.net>
1098 * @param string         $image
1099 * @param int|string     $rev
1100 * @param JpegMeta|bool  $meta
1101 * @param int            $size
1102 * @return array|false
1103 */
1104function media_image_preview_size($image, $rev, $meta, $size = 500) {
1105    if (!preg_match("/\.(jpe?g|gif|png)$/", $image) || !file_exists(mediaFN($image, $rev))) return false;
1106
1107    $info = getimagesize(mediaFN($image, $rev));
1108    $w = (int) $info[0];
1109    $h = (int) $info[1];
1110
1111    if($meta && ($w > $size || $h > $size)){
1112        $ratio = $meta->getResizeRatio($size, $size);
1113        $w = floor($w * $ratio);
1114        $h = floor($h * $ratio);
1115    }
1116    return array($w, $h);
1117}
1118
1119/**
1120 * Returns the requested EXIF/IPTC tag from the image meta
1121 *
1122 * @author Kate Arzamastseva <pshns@ukr.net>
1123 *
1124 * @param array    $tags array with tags, first existing is returned
1125 * @param JpegMeta $meta
1126 * @param string   $alt  alternative value
1127 * @return string
1128 */
1129function media_getTag($tags,$meta,$alt=''){
1130    if($meta === false) return $alt;
1131    $info = $meta->getField($tags);
1132    if($info == false) return $alt;
1133    return $info;
1134}
1135
1136/**
1137 * Returns mediafile tags
1138 *
1139 * @author Kate Arzamastseva <pshns@ukr.net>
1140 *
1141 * @param JpegMeta $meta
1142 * @return array list of tags of the mediafile
1143 */
1144function media_file_tags($meta) {
1145    // load the field descriptions
1146    static $fields = null;
1147    if(is_null($fields)){
1148        $config_files = getConfigFiles('mediameta');
1149        foreach ($config_files as $config_file) {
1150            if(file_exists($config_file)) include($config_file);
1151        }
1152    }
1153
1154    $tags = array();
1155
1156    foreach($fields as $key => $tag){
1157        $t = array();
1158        if (!empty($tag[0])) $t = array($tag[0]);
1159        if(isset($tag[3]) && is_array($tag[3])) $t = array_merge($t,$tag[3]);
1160        $value = media_getTag($t, $meta);
1161        $tags[] = array('tag' => $tag, 'value' => $value);
1162    }
1163
1164    return $tags;
1165}
1166
1167/**
1168 * Prints mediafile tags
1169 *
1170 * @author Kate Arzamastseva <pshns@ukr.net>
1171 *
1172 * @param string        $image image id
1173 * @param int           $auth  permission level
1174 * @param string|int    $rev   revision timestamp, or empty string
1175 * @param bool|JpegMeta $meta  image object, or create one if false
1176 */
1177function media_details($image, $auth, $rev='', $meta=false) {
1178    global $lang;
1179
1180    if (!$meta) $meta = new JpegMeta(mediaFN($image, $rev));
1181    $tags = media_file_tags($meta);
1182
1183    echo '<dl>'.NL;
1184    foreach($tags as $tag){
1185        if ($tag['value']) {
1186            $value = cleanText($tag['value']);
1187            echo '<dt>'.$lang[$tag['tag'][1]].'</dt><dd>';
1188            if ($tag['tag'][2] == 'date') echo dformat($value);
1189            else echo hsc($value);
1190            echo '</dd>'.NL;
1191        }
1192    }
1193    echo '</dl>'.NL;
1194    echo '<dl>'.NL;
1195    echo '<dt>'.$lang['reference'].':</dt>';
1196    $media_usage = ft_mediause($image,true);
1197    if(count($media_usage) > 0){
1198        foreach($media_usage as $path){
1199            echo '<dd>'.html_wikilink($path).'</dd>';
1200        }
1201    }else{
1202        echo '<dd>'.$lang['nothingfound'].'</dd>';
1203    }
1204    echo '</dl>'.NL;
1205
1206}
1207
1208/**
1209 * Shows difference between two revisions of file
1210 *
1211 * @author Kate Arzamastseva <pshns@ukr.net>
1212 *
1213 * @param string $image  image id
1214 * @param string $ns
1215 * @param int $auth permission level
1216 * @param bool $fromajax
1217 * @return false|null|string
1218 */
1219function media_diff($image, $ns, $auth, $fromajax = false) {
1220    global $conf;
1221    global $INPUT;
1222
1223    if ($auth < AUTH_READ || !$image || !$conf['mediarevisions']) return '';
1224
1225    $rev1 = $INPUT->int('rev');
1226
1227    $rev2 = $INPUT->ref('rev2');
1228    if(is_array($rev2)){
1229        $rev1 = (int) $rev2[0];
1230        $rev2 = (int) $rev2[1];
1231
1232        if(!$rev1){
1233            $rev1 = $rev2;
1234            unset($rev2);
1235        }
1236    }else{
1237        $rev2 = $INPUT->int('rev2');
1238    }
1239
1240    if ($rev1 && !file_exists(mediaFN($image, $rev1))) $rev1 = false;
1241    if ($rev2 && !file_exists(mediaFN($image, $rev2))) $rev2 = false;
1242
1243    if($rev1 && $rev2){            // two specific revisions wanted
1244        // make sure order is correct (older on the left)
1245        if($rev1 < $rev2){
1246            $l_rev = $rev1;
1247            $r_rev = $rev2;
1248        }else{
1249            $l_rev = $rev2;
1250            $r_rev = $rev1;
1251        }
1252    }elseif($rev1){                // single revision given, compare to current
1253        $r_rev = '';
1254        $l_rev = $rev1;
1255    }else{                        // no revision was given, compare previous to current
1256        $r_rev = '';
1257        $medialog = new MediaChangeLog($image);
1258        $revs = $medialog->getRevisions(0, 1);
1259        if (file_exists(mediaFN($image, $revs[0]))) {
1260            $l_rev = $revs[0];
1261        } else {
1262            $l_rev = '';
1263        }
1264    }
1265
1266    // prepare event data
1267    $data = array();
1268    $data[0] = $image;
1269    $data[1] = $l_rev;
1270    $data[2] = $r_rev;
1271    $data[3] = $ns;
1272    $data[4] = $auth;
1273    $data[5] = $fromajax;
1274
1275    // trigger event
1276    return trigger_event('MEDIA_DIFF', $data, '_media_file_diff', true);
1277}
1278
1279/**
1280 * Callback for media file diff
1281 *
1282 * @param array $data event data
1283 * @return false|null
1284 */
1285function _media_file_diff($data) {
1286    if(is_array($data) && count($data)===6) {
1287        media_file_diff($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
1288    } else {
1289        return false;
1290    }
1291}
1292
1293/**
1294 * Shows difference between two revisions of image
1295 *
1296 * @author Kate Arzamastseva <pshns@ukr.net>
1297 *
1298 * @param string $image
1299 * @param string|int $l_rev revision timestamp, or empty string
1300 * @param string|int $r_rev revision timestamp, or empty string
1301 * @param string $ns
1302 * @param int $auth permission level
1303 * @param bool $fromajax
1304 */
1305function media_file_diff($image, $l_rev, $r_rev, $ns, $auth, $fromajax){
1306    global $lang;
1307    global $INPUT;
1308
1309    $l_meta = new JpegMeta(mediaFN($image, $l_rev));
1310    $r_meta = new JpegMeta(mediaFN($image, $r_rev));
1311
1312    $is_img = preg_match('/\.(jpe?g|gif|png)$/', $image);
1313    if ($is_img) {
1314        $l_size = media_image_preview_size($image, $l_rev, $l_meta);
1315        $r_size = media_image_preview_size($image, $r_rev, $r_meta);
1316        $is_img = ($l_size && $r_size && ($l_size[0] >= 30 || $r_size[0] >= 30));
1317
1318        $difftype = $INPUT->str('difftype');
1319
1320        if (!$fromajax) {
1321            $form = new Doku_Form(array(
1322                'action' => media_managerURL(array(), '&'),
1323                'method' => 'get',
1324                'id' => 'mediamanager__form_diffview',
1325                'class' => 'diffView'
1326            ));
1327            $form->addHidden('sectok', null);
1328            $form->addElement('<input type="hidden" name="rev2[]" value="'.$l_rev.'" ></input>');
1329            $form->addElement('<input type="hidden" name="rev2[]" value="'.$r_rev.'" ></input>');
1330            $form->addHidden('mediado', 'diff');
1331            $form->printForm();
1332
1333            echo NL.'<div id="mediamanager__diff" >'.NL;
1334        }
1335
1336        if ($difftype == 'opacity' || $difftype == 'portions') {
1337            media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $difftype);
1338            if (!$fromajax) echo '</div>';
1339            return;
1340        }
1341    }
1342
1343    list($l_head, $r_head) = html_diff_head($l_rev, $r_rev, $image, true);
1344
1345    ?>
1346    <div class="table">
1347    <table>
1348      <tr>
1349        <th><?php echo $l_head; ?></th>
1350        <th><?php echo $r_head; ?></th>
1351      </tr>
1352    <?php
1353
1354    echo '<tr class="image">';
1355    echo '<td>';
1356    media_preview($image, $auth, $l_rev, $l_meta);
1357    echo '</td>';
1358
1359    echo '<td>';
1360    media_preview($image, $auth, $r_rev, $r_meta);
1361    echo '</td>';
1362    echo '</tr>'.NL;
1363
1364    echo '<tr class="actions">';
1365    echo '<td>';
1366    media_preview_buttons($image, $auth, $l_rev);
1367    echo '</td>';
1368
1369    echo '<td>';
1370    media_preview_buttons($image, $auth, $r_rev);
1371    echo '</td>';
1372    echo '</tr>'.NL;
1373
1374    $l_tags = media_file_tags($l_meta);
1375    $r_tags = media_file_tags($r_meta);
1376    // FIXME r_tags-only stuff
1377    foreach ($l_tags as $key => $l_tag) {
1378        if ($l_tag['value'] != $r_tags[$key]['value']) {
1379            $r_tags[$key]['highlighted'] = true;
1380            $l_tags[$key]['highlighted'] = true;
1381        } else if (!$l_tag['value'] || !$r_tags[$key]['value']) {
1382            unset($r_tags[$key]);
1383            unset($l_tags[$key]);
1384        }
1385    }
1386
1387    echo '<tr>';
1388    foreach(array($l_tags,$r_tags) as $tags){
1389        echo '<td>'.NL;
1390
1391        echo '<dl class="img_tags">';
1392        foreach($tags as $tag){
1393            $value = cleanText($tag['value']);
1394            if (!$value) $value = '-';
1395            echo '<dt>'.$lang[$tag['tag'][1]].'</dt>';
1396            echo '<dd>';
1397            if ($tag['highlighted']) {
1398                echo '<strong>';
1399            }
1400            if ($tag['tag'][2] == 'date') echo dformat($value);
1401            else echo hsc($value);
1402            if ($tag['highlighted']) {
1403                echo '</strong>';
1404            }
1405            echo '</dd>';
1406        }
1407        echo '</dl>'.NL;
1408
1409        echo '</td>';
1410    }
1411    echo '</tr>'.NL;
1412
1413    echo '</table>'.NL;
1414    echo '</div>'.NL;
1415
1416    if ($is_img && !$fromajax) echo '</div>';
1417}
1418
1419/**
1420 * Prints two images side by side
1421 * and slider
1422 *
1423 * @author Kate Arzamastseva <pshns@ukr.net>
1424 *
1425 * @param string $image   image id
1426 * @param int    $l_rev   revision timestamp, or empty string
1427 * @param int    $r_rev   revision timestamp, or empty string
1428 * @param array  $l_size  array with width and height
1429 * @param array  $r_size  array with width and height
1430 * @param string $type
1431 */
1432function media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $type) {
1433    if ($l_size != $r_size) {
1434        if ($r_size[0] > $l_size[0]) {
1435            $l_size = $r_size;
1436        }
1437    }
1438
1439    $l_more = array('rev' => $l_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1440    $r_more = array('rev' => $r_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1441
1442    $l_src = ml($image, $l_more);
1443    $r_src = ml($image, $r_more);
1444
1445    // slider
1446    echo '<div class="slider" style="max-width: '.($l_size[0]-20).'px;" ></div>'.NL;
1447
1448    // two images in divs
1449    echo '<div class="imageDiff ' . $type . '">'.NL;
1450    echo '<div class="image1" style="max-width: '.$l_size[0].'px;">';
1451    echo '<img src="'.$l_src.'" alt="" />';
1452    echo '</div>'.NL;
1453    echo '<div class="image2" style="max-width: '.$l_size[0].'px;">';
1454    echo '<img src="'.$r_src.'" alt="" />';
1455    echo '</div>'.NL;
1456    echo '</div>'.NL;
1457}
1458
1459/**
1460 * Restores an old revision of a media file
1461 *
1462 * @param string $image media id
1463 * @param int    $rev   revision timestamp or empty string
1464 * @param int    $auth
1465 * @return string - file's id
1466 *
1467 * @author Kate Arzamastseva <pshns@ukr.net>
1468 */
1469function media_restore($image, $rev, $auth){
1470    global $conf;
1471    if ($auth < AUTH_UPLOAD || !$conf['mediarevisions']) return false;
1472    $removed = (!file_exists(mediaFN($image)) && file_exists(mediaMetaFN($image, '.changes')));
1473    if (!$image || (!file_exists(mediaFN($image)) && !$removed)) return false;
1474    if (!$rev || !file_exists(mediaFN($image, $rev))) return false;
1475    list(,$imime,) = mimetype($image);
1476    $res = media_upload_finish(mediaFN($image, $rev),
1477        mediaFN($image),
1478        $image,
1479        $imime,
1480        true,
1481        'copy');
1482    if (is_array($res)) {
1483        msg($res[0], $res[1]);
1484        return false;
1485    }
1486    return $res;
1487}
1488
1489/**
1490 * List all files found by the search request
1491 *
1492 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1493 * @author Andreas Gohr <gohr@cosmocode.de>
1494 * @author Kate Arzamastseva <pshns@ukr.net>
1495 * @triggers MEDIA_SEARCH
1496 *
1497 * @param string $query
1498 * @param string $ns
1499 * @param null|int $auth
1500 * @param bool $fullscreen
1501 * @param string $sort
1502 */
1503function media_searchlist($query,$ns,$auth=null,$fullscreen=false,$sort='natural'){
1504    global $conf;
1505    global $lang;
1506
1507    $ns = cleanID($ns);
1508    $evdata = array(
1509        'ns'    => $ns,
1510        'data'  => array(),
1511        'query' => $query
1512    );
1513    if (!blank($query)) {
1514        $evt = new Doku_Event('MEDIA_SEARCH', $evdata);
1515        if ($evt->advise_before()) {
1516            $dir = utf8_encodeFN(str_replace(':','/',$evdata['ns']));
1517            $quoted = preg_quote($evdata['query'],'/');
1518            //apply globbing
1519            $quoted = str_replace(array('\*', '\?'), array('.*', '.'), $quoted, $count);
1520
1521            //if we use globbing file name must match entirely but may be preceded by arbitrary namespace
1522            if ($count > 0) $quoted = '^([^:]*:)*'.$quoted.'$';
1523
1524            $pattern = '/'.$quoted.'/i';
1525            search($evdata['data'],
1526                    $conf['mediadir'],
1527                    'search_media',
1528                    array('showmsg'=>false,'pattern'=>$pattern),
1529                    $dir,
1530                    1,
1531                    $sort);
1532        }
1533        $evt->advise_after();
1534        unset($evt);
1535    }
1536
1537    if (!$fullscreen) {
1538        echo '<h1 id="media__ns">'.sprintf($lang['searchmedia_in'],hsc($ns).':*').'</h1>'.NL;
1539        media_searchform($ns,$query);
1540    }
1541
1542    if(!count($evdata['data'])){
1543        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
1544    }else {
1545        if ($fullscreen) {
1546            echo '<ul class="' . _media_get_list_type() . '">';
1547        }
1548        foreach($evdata['data'] as $item){
1549            if (!$fullscreen) media_printfile($item,$item['perm'],'',true);
1550            else media_printfile_thumbs($item,$item['perm'],false,true);
1551        }
1552        if ($fullscreen) echo '</ul>'.NL;
1553    }
1554}
1555
1556/**
1557 * Formats and prints one file in the list
1558 *
1559 * @param array     $item
1560 * @param int       $auth              permission level
1561 * @param string    $jump              item id
1562 * @param bool      $display_namespace
1563 */
1564function media_printfile($item,$auth,$jump,$display_namespace=false){
1565    global $lang;
1566
1567    // Prepare zebra coloring
1568    // I always wanted to use this variable name :-D
1569    static $twibble = 1;
1570    $twibble *= -1;
1571    $zebra = ($twibble == -1) ? 'odd' : 'even';
1572
1573    // Automatically jump to recent action
1574    if($jump == $item['id']) {
1575        $jump = ' id="scroll__here" ';
1576    }else{
1577        $jump = '';
1578    }
1579
1580    // Prepare fileicons
1581    list($ext) = mimetype($item['file'],false);
1582    $class = preg_replace('/[^_\-a-z0-9]+/i','_',$ext);
1583    $class = 'select mediafile mf_'.$class;
1584
1585    // Prepare filename
1586    $file = utf8_decodeFN($item['file']);
1587
1588    // Prepare info
1589    $info = '';
1590    if($item['isimg']){
1591        $info .= (int) $item['meta']->getField('File.Width');
1592        $info .= '&#215;';
1593        $info .= (int) $item['meta']->getField('File.Height');
1594        $info .= ' ';
1595    }
1596    $info .= '<i>'.dformat($item['mtime']).'</i>';
1597    $info .= ' ';
1598    $info .= filesize_h($item['size']);
1599
1600    // output
1601    echo '<div class="'.$zebra.'"'.$jump.' title="'.hsc($item['id']).'">'.NL;
1602    if (!$display_namespace) {
1603        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($file).'</a> ';
1604    } else {
1605        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($item['id']).'</a><br/>';
1606    }
1607    echo '<span class="info">('.$info.')</span>'.NL;
1608
1609    // view button
1610    $link = ml($item['id'],'',true);
1611    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/magnifier.png" '.
1612        'alt="'.$lang['mediaview'].'" title="'.$lang['mediaview'].'" class="btn" /></a>';
1613
1614    // mediamanager button
1615    $link = wl('',array('do'=>'media','image'=>$item['id'],'ns'=>getNS($item['id'])));
1616    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/mediamanager.png" '.
1617        'alt="'.$lang['btn_media'].'" title="'.$lang['btn_media'].'" class="btn" /></a>';
1618
1619    // delete button
1620    if($item['writable'] && $auth >= AUTH_DELETE){
1621        $link = DOKU_BASE.'lib/exe/mediamanager.php?delete='.rawurlencode($item['id']).
1622            '&amp;sectok='.getSecurityToken();
1623        echo ' <a href="'.$link.'" class="btn_media_delete" title="'.$item['id'].'">'.
1624            '<img src="'.DOKU_BASE.'lib/images/trash.png" alt="'.$lang['btn_delete'].'" '.
1625            'title="'.$lang['btn_delete'].'" class="btn" /></a>';
1626    }
1627
1628    echo '<div class="example" id="ex_'.str_replace(':','_',$item['id']).'">';
1629    echo $lang['mediausage'].' <code>{{:'.$item['id'].'}}</code>';
1630    echo '</div>';
1631    if($item['isimg']) media_printimgdetail($item);
1632    echo '<div class="clearer"></div>'.NL;
1633    echo '</div>'.NL;
1634}
1635
1636/**
1637 * Display a media icon
1638 *
1639 * @param string $filename media id
1640 * @param string $size     the size subfolder, if not specified 16x16 is used
1641 * @return string html
1642 */
1643function media_printicon($filename, $size=''){
1644    list($ext) = mimetype(mediaFN($filename),false);
1645
1646    if (file_exists(DOKU_INC.'lib/images/fileicons/'.$size.'/'.$ext.'.png')) {
1647        $icon = DOKU_BASE.'lib/images/fileicons/'.$size.'/'.$ext.'.png';
1648    } else {
1649        $icon = DOKU_BASE.'lib/images/fileicons/'.$size.'/file.png';
1650    }
1651
1652    return '<img src="'.$icon.'" alt="'.$filename.'" class="icon" />';
1653}
1654
1655/**
1656 * Formats and prints one file in the list in the thumbnails view
1657 *
1658 * @author Kate Arzamastseva <pshns@ukr.net>
1659 *
1660 * @param array       $item
1661 * @param int         $auth              permission level
1662 * @param bool|string $jump              item id
1663 * @param bool        $display_namespace
1664 */
1665function media_printfile_thumbs($item,$auth,$jump=false,$display_namespace=false){
1666
1667    // Prepare filename
1668    $file = utf8_decodeFN($item['file']);
1669
1670    // output
1671    echo '<li><dl title="'.hsc($item['id']).'">'.NL;
1672
1673        echo '<dt>';
1674    if($item['isimg']) {
1675        media_printimgdetail($item, true);
1676
1677    } else {
1678        echo '<a id="d_:'.$item['id'].'" class="image" title="'.$item['id'].'" href="'.
1679            media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1680            'tab_details' => 'view')).'">';
1681        echo media_printicon($item['id'], '32x32');
1682        echo '</a>';
1683    }
1684    echo '</dt>'.NL;
1685    if (!$display_namespace) {
1686        $name = hsc($file);
1687    } else {
1688        $name = hsc($item['id']);
1689    }
1690    echo '<dd class="name"><a href="'.media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1691        'tab_details' => 'view')).'" id="h_:'.$item['id'].'">'.$name.'</a></dd>'.NL;
1692
1693    if($item['isimg']){
1694        $size = '';
1695        $size .= (int) $item['meta']->getField('File.Width');
1696        $size .= '&#215;';
1697        $size .= (int) $item['meta']->getField('File.Height');
1698        echo '<dd class="size">'.$size.'</dd>'.NL;
1699    } else {
1700        echo '<dd class="size">&#160;</dd>'.NL;
1701    }
1702    $date = dformat($item['mtime']);
1703    echo '<dd class="date">'.$date.'</dd>'.NL;
1704    $filesize = filesize_h($item['size']);
1705    echo '<dd class="filesize">'.$filesize.'</dd>'.NL;
1706    echo '</dl></li>'.NL;
1707}
1708
1709/**
1710 * Prints a thumbnail and metainfo
1711 *
1712 * @param array $item
1713 * @param bool  $fullscreen
1714 */
1715function media_printimgdetail($item, $fullscreen=false){
1716    // prepare thumbnail
1717    $size = $fullscreen ? 90 : 120;
1718
1719    $w = (int) $item['meta']->getField('File.Width');
1720    $h = (int) $item['meta']->getField('File.Height');
1721    if($w>$size || $h>$size){
1722        if (!$fullscreen) {
1723            $ratio = $item['meta']->getResizeRatio($size);
1724        } else {
1725            $ratio = $item['meta']->getResizeRatio($size,$size);
1726        }
1727        $w = floor($w * $ratio);
1728        $h = floor($h * $ratio);
1729    }
1730    $src = ml($item['id'],array('w'=>$w,'h'=>$h,'t'=>$item['mtime']));
1731    $p = array();
1732    if (!$fullscreen) {
1733        // In fullscreen mediamanager view, image resizing is done via CSS.
1734        $p['width']  = $w;
1735        $p['height'] = $h;
1736    }
1737    $p['alt']    = $item['id'];
1738    $att = buildAttributes($p);
1739
1740    // output
1741    if ($fullscreen) {
1742        echo '<a id="l_:'.$item['id'].'" class="image thumb" href="'.
1743            media_managerURL(['image' => hsc($item['id']), 'ns' => getNS($item['id']), 'tab_details' => 'view']).'">';
1744        echo '<img src="'.$src.'" '.$att.' />';
1745        echo '</a>';
1746    }
1747
1748    if ($fullscreen) return;
1749
1750    echo '<div class="detail">';
1751    echo '<div class="thumb">';
1752    echo '<a id="d_:'.$item['id'].'" class="select">';
1753    echo '<img src="'.$src.'" '.$att.' />';
1754    echo '</a>';
1755    echo '</div>';
1756
1757    // read EXIF/IPTC data
1758    $t = $item['meta']->getField(array('IPTC.Headline','xmp.dc:title'));
1759    $d = $item['meta']->getField(array('IPTC.Caption','EXIF.UserComment',
1760                'EXIF.TIFFImageDescription',
1761                'EXIF.TIFFUserComment'));
1762    if(utf8_strlen($d) > 250) $d = utf8_substr($d,0,250).'...';
1763    $k = $item['meta']->getField(array('IPTC.Keywords','IPTC.Category','xmp.dc:subject'));
1764
1765    // print EXIF/IPTC data
1766    if($t || $d || $k ){
1767        echo '<p>';
1768        if($t) echo '<strong>'.hsc($t).'</strong><br />';
1769        if($d) echo hsc($d).'<br />';
1770        if($t) echo '<em>'.hsc($k).'</em>';
1771        echo '</p>';
1772    }
1773    echo '</div>';
1774}
1775
1776/**
1777 * Build link based on the current, adding/rewriting parameters
1778 *
1779 * @author Kate Arzamastseva <pshns@ukr.net>
1780 *
1781 * @param array|bool $params
1782 * @param string     $amp           separator
1783 * @param bool       $abs           absolute url?
1784 * @param bool       $params_array  return the parmeters array?
1785 * @return string|array - link or link parameters
1786 */
1787function media_managerURL($params=false, $amp='&amp;', $abs=false, $params_array=false) {
1788    global $ID;
1789    global $INPUT;
1790
1791    $gets = array('do' => 'media');
1792    $media_manager_params = array('tab_files', 'tab_details', 'image', 'ns', 'list', 'sort');
1793    foreach ($media_manager_params as $x) {
1794        if ($INPUT->has($x)) $gets[$x] = $INPUT->str($x);
1795    }
1796
1797    if ($params) {
1798        $gets = $params + $gets;
1799    }
1800    unset($gets['id']);
1801    if (isset($gets['delete'])) {
1802        unset($gets['image']);
1803        unset($gets['tab_details']);
1804    }
1805
1806    if ($params_array) return $gets;
1807
1808    return wl($ID,$gets,$abs,$amp);
1809}
1810
1811/**
1812 * Print the media upload form if permissions are correct
1813 *
1814 * @author Andreas Gohr <andi@splitbrain.org>
1815 * @author Kate Arzamastseva <pshns@ukr.net>
1816 *
1817 * @param string $ns
1818 * @param int    $auth permission level
1819 * @param bool  $fullscreen
1820 */
1821function media_uploadform($ns, $auth, $fullscreen = false){
1822    global $lang;
1823    global $conf;
1824    global $INPUT;
1825
1826    if($auth < AUTH_UPLOAD) {
1827        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.NL;
1828        return;
1829    }
1830    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1831
1832    $update = false;
1833    $id = '';
1834    if ($auth >= $auth_ow && $fullscreen && $INPUT->str('mediado') == 'update') {
1835        $update = true;
1836        $id = cleanID($INPUT->str('image'));
1837    }
1838
1839    // The default HTML upload form
1840    $params = array('id'      => 'dw__upload',
1841                    'enctype' => 'multipart/form-data');
1842    if (!$fullscreen) {
1843        $params['action'] = DOKU_BASE.'lib/exe/mediamanager.php';
1844    } else {
1845        $params['action'] = media_managerURL(array('tab_files' => 'files',
1846            'tab_details' => 'view'), '&');
1847    }
1848
1849    $form = new Doku_Form($params);
1850    if (!$fullscreen) echo '<div class="upload">' . $lang['mediaupload'] . '</div>';
1851    $form->addElement(formSecurityToken());
1852    $form->addHidden('ns', hsc($ns));
1853    $form->addElement(form_makeOpenTag('p'));
1854    $form->addElement(form_makeFileField('upload', $lang['txt_upload'], 'upload__file'));
1855    $form->addElement(form_makeCloseTag('p'));
1856    $form->addElement(form_makeOpenTag('p'));
1857    $form->addElement(form_makeTextField('mediaid', noNS($id), $lang['txt_filename'], 'upload__name'));
1858    $form->addElement(form_makeButton('submit', '', $lang['btn_upload']));
1859    $form->addElement(form_makeCloseTag('p'));
1860
1861    if($auth >= $auth_ow){
1862        $form->addElement(form_makeOpenTag('p'));
1863        $attrs = array();
1864        if ($update) $attrs['checked'] = 'checked';
1865        $form->addElement(form_makeCheckboxField('ow', 1, $lang['txt_overwrt'], 'dw__ow', 'check', $attrs));
1866        $form->addElement(form_makeCloseTag('p'));
1867    }
1868
1869    echo NL.'<div id="mediamanager__uploader">'.NL;
1870    html_form('upload', $form);
1871
1872    echo '</div>'.NL;
1873
1874    echo '<p class="maxsize">';
1875    printf($lang['maxuploadsize'],filesize_h(media_getuploadsize()));
1876    echo '</p>'.NL;
1877
1878}
1879
1880/**
1881 * Returns the size uploaded files may have
1882 *
1883 * This uses a conservative approach using the lowest number found
1884 * in any of the limiting ini settings
1885 *
1886 * @returns int size in bytes
1887 */
1888function media_getuploadsize(){
1889    $okay = 0;
1890
1891    $post = (int) php_to_byte(@ini_get('post_max_size'));
1892    $suho = (int) php_to_byte(@ini_get('suhosin.post.max_value_length'));
1893    $upld = (int) php_to_byte(@ini_get('upload_max_filesize'));
1894
1895    if($post && ($post < $okay || $okay == 0)) $okay = $post;
1896    if($suho && ($suho < $okay || $okay == 0)) $okay = $suho;
1897    if($upld && ($upld < $okay || $okay == 0)) $okay = $upld;
1898
1899    return $okay;
1900}
1901
1902/**
1903 * Print the search field form
1904 *
1905 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1906 * @author Kate Arzamastseva <pshns@ukr.net>
1907 *
1908 * @param string $ns
1909 * @param string $query
1910 * @param bool $fullscreen
1911 */
1912function media_searchform($ns,$query='',$fullscreen=false){
1913    global $lang;
1914
1915    // The default HTML search form
1916    $params = array('id' => 'dw__mediasearch');
1917    if (!$fullscreen) {
1918        $params['action'] = DOKU_BASE.'lib/exe/mediamanager.php';
1919    } else {
1920        $params['action'] = media_managerURL(array(), '&');
1921    }
1922    $form = new Doku_Form($params);
1923    $form->addHidden('ns', $ns);
1924    $form->addHidden($fullscreen ? 'mediado' : 'do', 'searchlist');
1925
1926    $form->addElement(form_makeOpenTag('p'));
1927    $form->addElement(
1928        form_makeTextField(
1929            'q',
1930            $query,
1931            $lang['searchmedia'],
1932            '',
1933            '',
1934            array('title' => sprintf($lang['searchmedia_in'], hsc($ns) . ':*'))
1935        )
1936    );
1937    $form->addElement(form_makeButton('submit', '', $lang['btn_search']));
1938    $form->addElement(form_makeCloseTag('p'));
1939    html_form('searchmedia', $form);
1940}
1941
1942/**
1943 * Build a tree outline of available media namespaces
1944 *
1945 * @author Andreas Gohr <andi@splitbrain.org>
1946 *
1947 * @param string $ns
1948 */
1949function media_nstree($ns){
1950    global $conf;
1951    global $lang;
1952
1953    // currently selected namespace
1954    $ns  = cleanID($ns);
1955    if(empty($ns)){
1956        global $ID;
1957        $ns = (string)getNS($ID);
1958    }
1959
1960    $ns_dir  = utf8_encodeFN(str_replace(':','/',$ns));
1961
1962    $data = array();
1963    search($data,$conf['mediadir'],'search_index',array('ns' => $ns_dir, 'nofiles' => true));
1964
1965    // wrap a list with the root level around the other namespaces
1966    array_unshift($data, array('level' => 0, 'id' => '', 'open' =>'true',
1967                               'label' => '['.$lang['mediaroot'].']'));
1968
1969    // insert the current ns into the hierarchy if it isn't already part of it
1970    $ns_parts = explode(':', $ns);
1971    $tmp_ns = '';
1972    $pos = 0;
1973    foreach ($ns_parts as $level => $part) {
1974        if ($tmp_ns) $tmp_ns .= ':'.$part;
1975        else $tmp_ns = $part;
1976
1977        // find the namespace parts or insert them
1978        while ($data[$pos]['id'] != $tmp_ns) {
1979            if (
1980                $pos >= count($data) ||
1981                (
1982                    $data[$pos]['level'] <= $level+1 &&
1983                    strnatcmp(utf8_encodeFN($data[$pos]['id']), utf8_encodeFN($tmp_ns)) > 0
1984                )
1985            ) {
1986                array_splice($data, $pos, 0, array(array('level' => $level+1, 'id' => $tmp_ns, 'open' => 'true')));
1987                break;
1988            }
1989            ++$pos;
1990        }
1991    }
1992
1993    echo html_buildlist($data,'idx','media_nstree_item','media_nstree_li');
1994}
1995
1996/**
1997 * Userfunction for html_buildlist
1998 *
1999 * Prints a media namespace tree item
2000 *
2001 * @author Andreas Gohr <andi@splitbrain.org>
2002 *
2003 * @param array $item
2004 * @return string html
2005 */
2006function media_nstree_item($item){
2007    global $INPUT;
2008    $pos   = strrpos($item['id'], ':');
2009    $label = substr($item['id'], $pos > 0 ? $pos + 1 : 0);
2010    if(empty($item['label'])) $item['label'] = $label;
2011
2012    $ret  = '';
2013    if (!($INPUT->str('do') == 'media'))
2014    $ret .= '<a href="'.DOKU_BASE.'lib/exe/mediamanager.php?ns='.idfilter($item['id']).'" class="idx_dir">';
2015    else $ret .= '<a href="'.media_managerURL(array('ns' => idfilter($item['id'], false), 'tab_files' => 'files'))
2016        .'" class="idx_dir">';
2017    $ret .= $item['label'];
2018    $ret .= '</a>';
2019    return $ret;
2020}
2021
2022/**
2023 * Userfunction for html_buildlist
2024 *
2025 * Prints a media namespace tree item opener
2026 *
2027 * @author Andreas Gohr <andi@splitbrain.org>
2028 *
2029 * @param array $item
2030 * @return string html
2031 */
2032function media_nstree_li($item){
2033    $class='media level'.$item['level'];
2034    if($item['open']){
2035        $class .= ' open';
2036        $img   = DOKU_BASE.'lib/images/minus.gif';
2037        $alt   = '−';
2038    }else{
2039        $class .= ' closed';
2040        $img   = DOKU_BASE.'lib/images/plus.gif';
2041        $alt   = '+';
2042    }
2043    // TODO: only deliver an image if it actually has a subtree...
2044    return '<li class="'.$class.'">'.
2045        '<img src="'.$img.'" alt="'.$alt.'" />';
2046}
2047
2048/**
2049 * Resizes the given image to the given size
2050 *
2051 * @author  Andreas Gohr <andi@splitbrain.org>
2052 *
2053 * @param string $file filename, path to file
2054 * @param string $ext  extension
2055 * @param int    $w    desired width
2056 * @param int    $h    desired height
2057 * @return string path to resized or original size if failed
2058 */
2059function media_resize_image($file, $ext, $w, $h=0){
2060    global $conf;
2061
2062    $info = @getimagesize($file); //get original size
2063    if($info == false) return $file; // that's no image - it's a spaceship!
2064
2065    if(!$h) $h = round(($w * $info[1]) / $info[0]);
2066    if(!$w) $w = round(($h * $info[0]) / $info[1]);
2067
2068    // we wont scale up to infinity
2069    if($w > 2000 || $h > 2000) return $file;
2070
2071    // resize necessary? - (w,h) = native dimensions
2072    if(($w == $info[0]) && ($h == $info[1])) return $file;
2073
2074    //cache
2075    $local = getCacheName($file,'.media.'.$w.'x'.$h.'.'.$ext);
2076    $mtime = @filemtime($local); // 0 if not exists
2077
2078    if($mtime > filemtime($file) ||
2079        media_resize_imageIM($ext, $file, $info[0], $info[1], $local, $w, $h) ||
2080        media_resize_imageGD($ext, $file, $info[0], $info[1], $local, $w, $h)
2081    ) {
2082        if(!empty($conf['fperm'])) @chmod($local, $conf['fperm']);
2083        return $local;
2084    }
2085    //still here? resizing failed
2086    return $file;
2087}
2088
2089/**
2090 * Crops the given image to the wanted ratio, then calls media_resize_image to scale it
2091 * to the wanted size
2092 *
2093 * Crops are centered horizontally but prefer the upper third of an vertical
2094 * image because most pics are more interesting in that area (rule of thirds)
2095 *
2096 * @author  Andreas Gohr <andi@splitbrain.org>
2097 *
2098 * @param string $file filename, path to file
2099 * @param string $ext  extension
2100 * @param int    $w    desired width
2101 * @param int    $h    desired height
2102 * @return string path to resized or original size if failed
2103 */
2104function media_crop_image($file, $ext, $w, $h=0){
2105    global $conf;
2106
2107    if(!$h) $h = $w;
2108    $info = @getimagesize($file); //get original size
2109    if($info == false) return $file; // that's no image - it's a spaceship!
2110
2111    // calculate crop size
2112    $fr = $info[0]/$info[1];
2113    $tr = $w/$h;
2114
2115    // check if the crop can be handled completely by resize,
2116    // i.e. the specified width & height match the aspect ratio of the source image
2117    if ($w == round($h*$fr)) {
2118        return media_resize_image($file, $ext, $w);
2119    }
2120
2121    if($tr >= 1){
2122        if($tr > $fr){
2123            $cw = $info[0];
2124            $ch = (int) ($info[0]/$tr);
2125        }else{
2126            $cw = (int) ($info[1]*$tr);
2127            $ch = $info[1];
2128        }
2129    }else{
2130        if($tr < $fr){
2131            $cw = (int) ($info[1]*$tr);
2132            $ch = $info[1];
2133        }else{
2134            $cw = $info[0];
2135            $ch = (int) ($info[0]/$tr);
2136        }
2137    }
2138    // calculate crop offset
2139    $cx = (int) (($info[0]-$cw)/2);
2140    $cy = (int) (($info[1]-$ch)/3);
2141
2142    //cache
2143    $local = getCacheName($file,'.media.'.$cw.'x'.$ch.'.crop.'.$ext);
2144    $mtime = @filemtime($local); // 0 if not exists
2145
2146    if( $mtime > @filemtime($file) ||
2147            media_crop_imageIM($ext,$file,$info[0],$info[1],$local,$cw,$ch,$cx,$cy) ||
2148            media_resize_imageGD($ext,$file,$cw,$ch,$local,$cw,$ch,$cx,$cy) ){
2149        if(!empty($conf['fperm'])) @chmod($local, $conf['fperm']);
2150        return media_resize_image($local,$ext, $w, $h);
2151    }
2152
2153    //still here? cropping failed
2154    return media_resize_image($file,$ext, $w, $h);
2155}
2156
2157/**
2158 * Calculate a token to be used to verify fetch requests for resized or
2159 * cropped images have been internally generated - and prevent external
2160 * DDOS attacks via fetch
2161 *
2162 * @author Christopher Smith <chris@jalakai.co.uk>
2163 *
2164 * @param string  $id    id of the image
2165 * @param int     $w     resize/crop width
2166 * @param int     $h     resize/crop height
2167 * @return string token or empty string if no token required
2168 */
2169function media_get_token($id,$w,$h){
2170    // token is only required for modified images
2171    if ($w || $h || media_isexternal($id)) {
2172        $token = $id;
2173        if ($w) $token .= '.'.$w;
2174        if ($h) $token .= '.'.$h;
2175
2176        return substr(PassHash::hmac('md5', $token, auth_cookiesalt()),0,6);
2177    }
2178
2179    return '';
2180}
2181
2182/**
2183 * Download a remote file and return local filename
2184 *
2185 * returns false if download fails. Uses cached file if available and
2186 * wanted
2187 *
2188 * @author  Andreas Gohr <andi@splitbrain.org>
2189 * @author  Pavel Vitis <Pavel.Vitis@seznam.cz>
2190 *
2191 * @param string $url
2192 * @param string $ext   extension
2193 * @param int    $cache cachetime in seconds
2194 * @return false|string path to cached file
2195 */
2196function media_get_from_URL($url,$ext,$cache){
2197    global $conf;
2198
2199    // if no cache or fetchsize just redirect
2200    if ($cache==0)           return false;
2201    if (!$conf['fetchsize']) return false;
2202
2203    $local = getCacheName(strtolower($url),".media.$ext");
2204    $mtime = @filemtime($local); // 0 if not exists
2205
2206    //decide if download needed:
2207    if(($mtime == 0) || // cache does not exist
2208        ($cache != -1 && $mtime < time() - $cache) // 'recache' and cache has expired
2209    ) {
2210        if(media_image_download($url, $local)) {
2211            return $local;
2212        } else {
2213            return false;
2214        }
2215    }
2216
2217    //if cache exists use it else
2218    if($mtime) return $local;
2219
2220    //else return false
2221    return false;
2222}
2223
2224/**
2225 * Download image files
2226 *
2227 * @author Andreas Gohr <andi@splitbrain.org>
2228 *
2229 * @param string $url
2230 * @param string $file path to file in which to put the downloaded content
2231 * @return bool
2232 */
2233function media_image_download($url,$file){
2234    global $conf;
2235    $http = new DokuHTTPClient();
2236    $http->keep_alive = false; // we do single ops here, no need for keep-alive
2237
2238    $http->max_bodysize = $conf['fetchsize'];
2239    $http->timeout = 25; //max. 25 sec
2240    $http->header_regexp = '!\r\nContent-Type: image/(jpe?g|gif|png)!i';
2241
2242    $data = $http->get($url);
2243    if(!$data) return false;
2244
2245    $fileexists = file_exists($file);
2246    $fp = @fopen($file,"w");
2247    if(!$fp) return false;
2248    fwrite($fp,$data);
2249    fclose($fp);
2250    if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
2251
2252    // check if it is really an image
2253    $info = @getimagesize($file);
2254    if(!$info){
2255        @unlink($file);
2256        return false;
2257    }
2258
2259    return true;
2260}
2261
2262/**
2263 * resize images using external ImageMagick convert program
2264 *
2265 * @author Pavel Vitis <Pavel.Vitis@seznam.cz>
2266 * @author Andreas Gohr <andi@splitbrain.org>
2267 *
2268 * @param string $ext     extension
2269 * @param string $from    filename path to file
2270 * @param int    $from_w  original width
2271 * @param int    $from_h  original height
2272 * @param string $to      path to resized file
2273 * @param int    $to_w    desired width
2274 * @param int    $to_h    desired height
2275 * @return bool
2276 */
2277function media_resize_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h){
2278    global $conf;
2279
2280    // check if convert is configured
2281    if(!$conf['im_convert']) return false;
2282
2283    // prepare command
2284    $cmd  = $conf['im_convert'];
2285    $cmd .= ' -resize '.$to_w.'x'.$to_h.'!';
2286    if ($ext == 'jpg' || $ext == 'jpeg') {
2287        $cmd .= ' -quality '.$conf['jpg_quality'];
2288    }
2289    $cmd .= " $from $to";
2290
2291    @exec($cmd,$out,$retval);
2292    if ($retval == 0) return true;
2293    return false;
2294}
2295
2296/**
2297 * crop images using external ImageMagick convert program
2298 *
2299 * @author Andreas Gohr <andi@splitbrain.org>
2300 *
2301 * @param string $ext     extension
2302 * @param string $from    filename path to file
2303 * @param int    $from_w  original width
2304 * @param int    $from_h  original height
2305 * @param string $to      path to resized file
2306 * @param int    $to_w    desired width
2307 * @param int    $to_h    desired height
2308 * @param int    $ofs_x   offset of crop centre
2309 * @param int    $ofs_y   offset of crop centre
2310 * @return bool
2311 */
2312function media_crop_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x,$ofs_y){
2313    global $conf;
2314
2315    // check if convert is configured
2316    if(!$conf['im_convert']) return false;
2317
2318    // prepare command
2319    $cmd  = $conf['im_convert'];
2320    $cmd .= ' -crop '.$to_w.'x'.$to_h.'+'.$ofs_x.'+'.$ofs_y;
2321    if ($ext == 'jpg' || $ext == 'jpeg') {
2322        $cmd .= ' -quality '.$conf['jpg_quality'];
2323    }
2324    $cmd .= " $from $to";
2325
2326    @exec($cmd,$out,$retval);
2327    if ($retval == 0) return true;
2328    return false;
2329}
2330
2331/**
2332 * resize or crop images using PHP's libGD support
2333 *
2334 * @author Andreas Gohr <andi@splitbrain.org>
2335 * @author Sebastian Wienecke <s_wienecke@web.de>
2336 *
2337 * @param string $ext     extension
2338 * @param string $from    filename path to file
2339 * @param int    $from_w  original width
2340 * @param int    $from_h  original height
2341 * @param string $to      path to resized file
2342 * @param int    $to_w    desired width
2343 * @param int    $to_h    desired height
2344 * @param int    $ofs_x   offset of crop centre
2345 * @param int    $ofs_y   offset of crop centre
2346 * @return bool
2347 */
2348function media_resize_imageGD($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x=0,$ofs_y=0){
2349    global $conf;
2350
2351    if($conf['gdlib'] < 1) return false; //no GDlib available or wanted
2352
2353    // check available memory
2354    if(!is_mem_available(($from_w * $from_h * 4) + ($to_w * $to_h * 4))){
2355        return false;
2356    }
2357
2358    // create an image of the given filetype
2359    $image = false;
2360    if ($ext == 'jpg' || $ext == 'jpeg'){
2361        if(!function_exists("imagecreatefromjpeg")) return false;
2362        $image = @imagecreatefromjpeg($from);
2363    }elseif($ext == 'png') {
2364        if(!function_exists("imagecreatefrompng")) return false;
2365        $image = @imagecreatefrompng($from);
2366
2367    }elseif($ext == 'gif') {
2368        if(!function_exists("imagecreatefromgif")) return false;
2369        $image = @imagecreatefromgif($from);
2370    }
2371    if(!$image) return false;
2372
2373    $newimg = false;
2374    if(($conf['gdlib']>1) && function_exists("imagecreatetruecolor") && $ext != 'gif'){
2375        $newimg = @imagecreatetruecolor ($to_w, $to_h);
2376    }
2377    if(!$newimg) $newimg = @imagecreate($to_w, $to_h);
2378    if(!$newimg){
2379        imagedestroy($image);
2380        return false;
2381    }
2382
2383    //keep png alpha channel if possible
2384    if($ext == 'png' && $conf['gdlib']>1 && function_exists('imagesavealpha')){
2385        imagealphablending($newimg, false);
2386        imagesavealpha($newimg,true);
2387    }
2388
2389    //keep gif transparent color if possible
2390    if($ext == 'gif' && function_exists('imagefill') && function_exists('imagecolorallocate')) {
2391        if(function_exists('imagecolorsforindex') && function_exists('imagecolortransparent')) {
2392            $transcolorindex = @imagecolortransparent($image);
2393            if($transcolorindex >= 0 ) { //transparent color exists
2394                $transcolor = @imagecolorsforindex($image, $transcolorindex);
2395                $transcolorindex = @imagecolorallocate(
2396                    $newimg,
2397                    $transcolor['red'],
2398                    $transcolor['green'],
2399                    $transcolor['blue']
2400                );
2401                @imagefill($newimg, 0, 0, $transcolorindex);
2402                @imagecolortransparent($newimg, $transcolorindex);
2403            }else{ //filling with white
2404                $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2405                @imagefill($newimg, 0, 0, $whitecolorindex);
2406            }
2407        }else{ //filling with white
2408            $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2409            @imagefill($newimg, 0, 0, $whitecolorindex);
2410        }
2411    }
2412
2413    //try resampling first
2414    if(function_exists("imagecopyresampled")){
2415        if(!@imagecopyresampled($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h)) {
2416            imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2417        }
2418    }else{
2419        imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2420    }
2421
2422    $okay = false;
2423    if ($ext == 'jpg' || $ext == 'jpeg'){
2424        if(!function_exists('imagejpeg')){
2425            $okay = false;
2426        }else{
2427            $okay = imagejpeg($newimg, $to, $conf['jpg_quality']);
2428        }
2429    }elseif($ext == 'png') {
2430        if(!function_exists('imagepng')){
2431            $okay = false;
2432        }else{
2433            $okay =  imagepng($newimg, $to);
2434        }
2435    }elseif($ext == 'gif') {
2436        if(!function_exists('imagegif')){
2437            $okay = false;
2438        }else{
2439            $okay = imagegif($newimg, $to);
2440        }
2441    }
2442
2443    // destroy GD image ressources
2444    if($image) imagedestroy($image);
2445    if($newimg) imagedestroy($newimg);
2446
2447    return $okay;
2448}
2449
2450/**
2451 * Return other media files with the same base name
2452 * but different extensions.
2453 *
2454 * @param string   $src     - ID of media file
2455 * @param string[] $exts    - alternative extensions to find other files for
2456 * @return array            - array(mime type => file ID)
2457 *
2458 * @author Anika Henke <anika@selfthinker.org>
2459 */
2460function media_alternativefiles($src, $exts){
2461
2462    $files = array();
2463    list($srcExt, /* $srcMime */) = mimetype($src);
2464    $filebase = substr($src, 0, -1 * (strlen($srcExt)+1));
2465
2466    foreach($exts as $ext) {
2467        $fileid = $filebase.'.'.$ext;
2468        $file = mediaFN($fileid);
2469        if(file_exists($file)) {
2470            list(/* $fileExt */, $fileMime) = mimetype($file);
2471            $files[$fileMime] = $fileid;
2472        }
2473    }
2474    return $files;
2475}
2476
2477/**
2478 * Check if video/audio is supported to be embedded.
2479 *
2480 * @param string $mime      - mimetype of media file
2481 * @param string $type      - type of media files to check ('video', 'audio', or null for all)
2482 * @return boolean
2483 *
2484 * @author Anika Henke <anika@selfthinker.org>
2485 */
2486function media_supportedav($mime, $type=NULL){
2487    $supportedAudio = array(
2488        'ogg' => 'audio/ogg',
2489        'mp3' => 'audio/mpeg',
2490        'wav' => 'audio/wav',
2491    );
2492    $supportedVideo = array(
2493        'webm' => 'video/webm',
2494        'ogv' => 'video/ogg',
2495        'mp4' => 'video/mp4',
2496    );
2497    if ($type == 'audio') {
2498        $supportedAv = $supportedAudio;
2499    } elseif ($type == 'video') {
2500        $supportedAv = $supportedVideo;
2501    } else {
2502        $supportedAv = array_merge($supportedAudio, $supportedVideo);
2503    }
2504    return in_array($mime, $supportedAv);
2505}
2506
2507/**
2508 * Return track media files with the same base name
2509 * but extensions that indicate kind and lang.
2510 * ie for foo.webm search foo.sub.lang.vtt, foo.cap.lang.vtt...
2511 *
2512 * @param string   $src     - ID of media file
2513 * @return array            - array(mediaID => array( kind, srclang ))
2514 *
2515 * @author Schplurtz le Déboulonné <Schplurtz@laposte.net>
2516 */
2517function media_trackfiles($src){
2518    $kinds=array(
2519        'sub' => 'subtitles',
2520        'cap' => 'captions',
2521        'des' => 'descriptions',
2522        'cha' => 'chapters',
2523        'met' => 'metadata'
2524    );
2525
2526    $files = array();
2527    $re='/\\.(sub|cap|des|cha|met)\\.([^.]+)\\.vtt$/';
2528    $baseid=pathinfo($src, PATHINFO_FILENAME);
2529    $pattern=mediaFN($baseid).'.*.*.vtt';
2530    $list=glob($pattern);
2531    foreach($list as $track) {
2532        if(preg_match($re, $track, $matches)){
2533            $files[$baseid.'.'.$matches[1].'.'.$matches[2].'.vtt']=array(
2534                $kinds[$matches[1]],
2535                $matches[2],
2536            );
2537        }
2538    }
2539    return $files;
2540}
2541
2542/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
2543