xref: /dokuwiki/inc/media.php (revision 2472a8f6cbd2abffe712ddd42fe2ad296d03d8f2) 
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
9if(!defined('DOKU_INC')) die('meh.');
10if(!defined('NL')) define('NL',"\n");
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 */
20function media_filesinuse($data,$id){
21    global $lang;
22    echo '<h1>'.$lang['reference'].' <code>'.hsc(noNS($id)).'</code></h1>';
23    echo '<p>'.hsc($lang['ref_inuse']).'</p>';
24
25    $hidden=0; //count of hits without read permission
26    foreach($data as $row){
27        if(auth_quickaclcheck($row) >= AUTH_READ && isVisiblePage($row)){
28            echo '<div class="search_result">';
29            echo '<span class="mediaref_ref">'.hsc($row).'</span>';
30            echo '</div>';
31        }else
32            $hidden++;
33    }
34    if ($hidden){
35        print '<div class="mediaref_hidden">'.$lang['ref_hidden'].'</div>';
36    }
37}
38
39/**
40 * Handles the saving of image meta data
41 *
42 * @author Andreas Gohr <andi@splitbrain.org>
43 * @author Kate Arzamastseva <pshns@ukr.net>
44 */
45function media_metasave($id,$auth,$data){
46    if($auth < AUTH_UPLOAD) return false;
47    if(!checkSecurityToken()) return false;
48    global $lang;
49    global $conf;
50    $src = mediaFN($id);
51
52    $meta = new JpegMeta($src);
53    $meta->_parseAll();
54
55    foreach($data as $key => $val){
56        $val=trim($val);
57        if(empty($val)){
58            $meta->deleteField($key);
59        }else{
60            $meta->setField($key,$val);
61        }
62    }
63
64    $old = @filemtime($src);
65    if(!@file_exists(mediaFN($id, $old)) && @file_exists($src)) {
66        // add old revision to the attic
67        media_saveOldRevision($id);
68    }
69
70    if($meta->save()){
71        if($conf['fperm']) chmod($src, $conf['fperm']);
72
73        $new = @filemtime($src);
74        // add a log entry to the media changelog
75        addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT, $lang['media_meta_edited']);
76
77        msg($lang['metasaveok'],1);
78        return $id;
79    }else{
80        msg($lang['metasaveerr'],-1);
81        return false;
82    }
83}
84
85/**
86 * check if a media is external source
87 *
88 * @author Gerrit Uitslag <klapinklapin@gmail.com>
89 * @param string $id the media ID or URL
90 * @return bool
91 */
92function media_isexternal($id){
93    if (preg_match('#^(?:https?|ftp)://#i', $id)) return true;
94    return false;
95}
96
97/**
98 * Check if a media item is public (eg, external URL or readable by @ALL)
99 *
100 * @author Andreas Gohr <andi@splitbrain.org>
101 * @param string $id  the media ID or URL
102 * @return bool
103 */
104function media_ispublic($id){
105    if(media_isexternal($id)) return true;
106    $id = cleanID($id);
107    if(auth_aclcheck(getNS($id).':*', '', array()) >= AUTH_READ) return true;
108    return false;
109}
110
111/**
112 * Display the form to edit image meta data
113 *
114 * @author Andreas Gohr <andi@splitbrain.org>
115 * @author Kate Arzamastseva <pshns@ukr.net>
116 */
117function media_metaform($id,$auth){
118    global $lang;
119
120    if($auth < AUTH_UPLOAD) {
121        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.NL;
122        return false;
123    }
124
125    // load the field descriptions
126    static $fields = null;
127    if(is_null($fields)){
128        $config_files = getConfigFiles('mediameta');
129        foreach ($config_files as $config_file) {
130            if(@file_exists($config_file)) include($config_file);
131        }
132    }
133
134    $src = mediaFN($id);
135
136    // output
137    $form = new Doku_Form(array('action' => media_managerURL(array('tab_details' => 'view'), '&'),
138                                'class' => 'meta'));
139    $form->addHidden('img', $id);
140    $form->addHidden('mediado', 'save');
141    foreach($fields as $key => $field){
142        // get current value
143        if (empty($field[0])) continue;
144        $tags = array($field[0]);
145        if(is_array($field[3])) $tags = array_merge($tags,$field[3]);
146        $value = tpl_img_getTag($tags,'',$src);
147        $value = cleanText($value);
148
149        // prepare attributes
150        $p = array();
151        $p['class'] = 'edit';
152        $p['id']    = 'meta__'.$key;
153        $p['name']  = 'meta['.$field[0].']';
154        $p_attrs    = array('class' => 'edit');
155
156        $form->addElement('<div class="row">');
157        if($field[2] == 'text'){
158            $form->addElement(form_makeField('text', $p['name'], $value, ($lang[$field[1]]) ? $lang[$field[1]] : $field[1] . ':', $p['id'], $p['class'], $p_attrs));
159        }else{
160            $att = buildAttributes($p);
161            $form->addElement('<label for="meta__'.$key.'">'.$lang[$field[1]].'</label>');
162            $form->addElement("<textarea $att rows=\"6\" cols=\"50\">".formText($value).'</textarea>');
163        }
164        $form->addElement('</div>'.NL);
165    }
166    $form->addElement('<div class="buttons">');
167    $form->addElement(form_makeButton('submit', '', $lang['btn_save'], array('accesskey' => 's', 'name' => 'mediado[save]')));
168    $form->addElement('</div>'.NL);
169    $form->printForm();
170
171    return true;
172}
173
174/**
175 * Convenience function to check if a media file is still in use
176 *
177 * @author Michael Klier <chi@chimeric.de>
178 */
179function media_inuse($id) {
180    global $conf;
181
182    if($conf['refcheck']){
183        $mediareferences = ft_mediause($id,true);
184        if(!count($mediareferences)) {
185            return false;
186        } else {
187            return $mediareferences;
188        }
189    } else {
190        return false;
191    }
192}
193
194define('DOKU_MEDIA_DELETED', 1);
195define('DOKU_MEDIA_NOT_AUTH', 2);
196define('DOKU_MEDIA_INUSE', 4);
197define('DOKU_MEDIA_EMPTY_NS', 8);
198
199/**
200 * Handles media file deletions
201 *
202 * If configured, checks for media references before deletion
203 *
204 * @author             Andreas Gohr <andi@splitbrain.org>
205 * @param string $id media id
206 * @param int $auth current auth check result
207 * @return int One of: 0,
208 *                     DOKU_MEDIA_DELETED,
209 *                     DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS,
210 *                     DOKU_MEDIA_NOT_AUTH,
211 *                     DOKU_MEDIA_INUSE
212 */
213function media_delete($id,$auth){
214    global $lang;
215    if($auth < AUTH_DELETE) return DOKU_MEDIA_NOT_AUTH;
216    if(media_inuse($id)) return DOKU_MEDIA_INUSE;
217
218    $file = mediaFN($id);
219
220    // trigger an event - MEDIA_DELETE_FILE
221    $data['id']   = $id;
222    $data['name'] = utf8_basename($file);
223    $data['path'] = $file;
224    $data['size'] = (@file_exists($file)) ? filesize($file) : 0;
225
226    $data['unl'] = false;
227    $data['del'] = false;
228    $evt = new Doku_Event('MEDIA_DELETE_FILE',$data);
229    if ($evt->advise_before()) {
230        $old = @filemtime($file);
231        if(!@file_exists(mediaFN($id, $old)) && @file_exists($file)) {
232            // add old revision to the attic
233            media_saveOldRevision($id);
234        }
235
236        $data['unl'] = @unlink($file);
237        if($data['unl']){
238            addMediaLogEntry(time(), $id, DOKU_CHANGE_TYPE_DELETE, $lang['deleted']);
239            $data['del'] = io_sweepNS($id,'mediadir');
240        }
241    }
242    $evt->advise_after();
243    unset($evt);
244
245    if($data['unl'] && $data['del']){
246        return DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS;
247    }
248
249    return $data['unl'] ? DOKU_MEDIA_DELETED : 0;
250}
251
252/**
253 * Handle file uploads via XMLHttpRequest
254 *
255 * @param string $ns target namespace
256 * @param int $auth current auth check result
257 * @return mixed false on error, id of the new file on success
258 */
259function media_upload_xhr($ns,$auth){
260    if(!checkSecurityToken()) return false;
261    global $INPUT;
262
263    $id = $INPUT->get->str('qqfile');
264    list($ext,$mime) = mimetype($id);
265    $input = fopen("php://input", "r");
266    if (!($tmp = io_mktmpdir())) return false;
267    $path = $tmp.'/'.md5($id);
268    $target = fopen($path, "w");
269    $realSize = stream_copy_to_stream($input, $target);
270    fclose($target);
271    fclose($input);
272    if (isset($_SERVER["CONTENT_LENGTH"]) && ($realSize != (int)$_SERVER["CONTENT_LENGTH"])){
273        unlink($path);
274        return false;
275    }
276
277    $res = media_save(
278        array('name' => $path,
279            'mime' => $mime,
280            'ext'  => $ext),
281        $ns.':'.$id,
282        (($INPUT->get->str('ow') == 'checked') ? true : false),
283        $auth,
284        'copy'
285    );
286    unlink($path);
287    if ($tmp) dir_delete($tmp);
288    if (is_array($res)) {
289        msg($res[0], $res[1]);
290        return false;
291    }
292    return $res;
293}
294
295/**
296 * Handles media file uploads
297 *
298 * @author Andreas Gohr <andi@splitbrain.org>
299 * @author Michael Klier <chi@chimeric.de>
300 * @param string $ns target namespace
301 * @param int $auth current auth check result
302 * @param bool|array $file $_FILES member, $_FILES['upload'] if false
303 * @return mixed false on error, id of the new file on success
304 */
305function media_upload($ns,$auth,$file=false){
306    if(!checkSecurityToken()) return false;
307    global $lang;
308    global $INPUT;
309
310    // get file and id
311    $id   = $INPUT->post->str('mediaid');
312    if (!$file) $file = $_FILES['upload'];
313    if(empty($id)) $id = $file['name'];
314
315    // check for errors (messages are done in lib/exe/mediamanager.php)
316    if($file['error']) return false;
317
318    // check extensions
319    list($fext,$fmime) = mimetype($file['name']);
320    list($iext,$imime) = mimetype($id);
321    if($fext && !$iext){
322        // no extension specified in id - read original one
323        $id   .= '.'.$fext;
324        $imime = $fmime;
325    }elseif($fext && $fext != $iext){
326        // extension was changed, print warning
327        msg(sprintf($lang['mediaextchange'],$fext,$iext));
328    }
329
330    $res = media_save(array('name' => $file['tmp_name'],
331                            'mime' => $imime,
332                            'ext'  => $iext), $ns.':'.$id,
333                      $INPUT->post->bool('ow'), $auth, 'copy_uploaded_file');
334    if (is_array($res)) {
335        msg($res[0], $res[1]);
336        return false;
337    }
338    return $res;
339}
340
341/**
342 * An alternative to move_uploaded_file that copies
343 *
344 * Using copy, makes sure any setgid bits on the media directory are honored
345 *
346 * @see   move_uploaded_file()
347 * @param string $from
348 * @param string $to
349 * @return bool
350 */
351function copy_uploaded_file($from, $to){
352    if(!is_uploaded_file($from)) return false;
353    $ok = copy($from, $to);
354    @unlink($from);
355    return $ok;
356}
357
358/**
359 * This generates an action event and delegates to _media_upload_action().
360 * Action plugins are allowed to pre/postprocess the uploaded file.
361 * (The triggered event is preventable.)
362 *
363 * Event data:
364 * $data[0]     fn_tmp: the temporary file name (read from $_FILES)
365 * $data[1]     fn: the file name of the uploaded file
366 * $data[2]     id: the future directory id of the uploaded file
367 * $data[3]     imime: the mimetype of the uploaded file
368 * $data[4]     overwrite: if an existing file is going to be overwritten
369 *
370 * @triggers MEDIA_UPLOAD_FINISH
371 */
372function media_save($file, $id, $ow, $auth, $move) {
373    if($auth < AUTH_UPLOAD) {
374        return array("You don't have permissions to upload files.", -1);
375    }
376
377    if (!isset($file['mime']) || !isset($file['ext'])) {
378        list($ext, $mime) = mimetype($id);
379        if (!isset($file['mime'])) {
380            $file['mime'] = $mime;
381        }
382        if (!isset($file['ext'])) {
383            $file['ext'] = $ext;
384        }
385    }
386
387    global $lang, $conf;
388
389    // get filename
390    $id   = cleanID($id);
391    $fn   = mediaFN($id);
392
393    // get filetype regexp
394    $types = array_keys(getMimeTypes());
395    $types = array_map(create_function('$q','return preg_quote($q,"/");'),$types);
396    $regex = join('|',$types);
397
398    // because a temp file was created already
399    if(!preg_match('/\.('.$regex.')$/i',$fn)) {
400        return array($lang['uploadwrong'],-1);
401    }
402
403    //check for overwrite
404    $overwrite = @file_exists($fn);
405    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
406    if($overwrite && (!$ow || $auth < $auth_ow)) {
407        return array($lang['uploadexist'], 0);
408    }
409    // check for valid content
410    $ok = media_contentcheck($file['name'], $file['mime']);
411    if($ok == -1){
412        return array(sprintf($lang['uploadbadcontent'],'.' . $file['ext']),-1);
413    }elseif($ok == -2){
414        return array($lang['uploadspam'],-1);
415    }elseif($ok == -3){
416        return array($lang['uploadxss'],-1);
417    }
418
419    // prepare event data
420    $data[0] = $file['name'];
421    $data[1] = $fn;
422    $data[2] = $id;
423    $data[3] = $file['mime'];
424    $data[4] = $overwrite;
425    $data[5] = $move;
426
427    // trigger event
428    return trigger_event('MEDIA_UPLOAD_FINISH', $data, '_media_upload_action', true);
429}
430
431/**
432 * Callback adapter for media_upload_finish()
433 * @author Michael Klier <chi@chimeric.de>
434 */
435function _media_upload_action($data) {
436    // fixme do further sanity tests of given data?
437    if(is_array($data) && count($data)===6) {
438        return media_upload_finish($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
439    } else {
440        return false; //callback error
441    }
442}
443
444/**
445 * Saves an uploaded media file
446 *
447 * @author Andreas Gohr <andi@splitbrain.org>
448 * @author Michael Klier <chi@chimeric.de>
449 * @author Kate Arzamastseva <pshns@ukr.net>
450 */
451function media_upload_finish($fn_tmp, $fn, $id, $imime, $overwrite, $move = 'move_uploaded_file') {
452    global $conf;
453    global $lang;
454    global $REV;
455
456    $old = @filemtime($fn);
457    if(!@file_exists(mediaFN($id, $old)) && @file_exists($fn)) {
458        // add old revision to the attic if missing
459        media_saveOldRevision($id);
460    }
461
462    // prepare directory
463    io_createNamespace($id, 'media');
464
465    if($move($fn_tmp, $fn)) {
466        @clearstatcache(true,$fn);
467        $new = @filemtime($fn);
468        // Set the correct permission here.
469        // Always chmod media because they may be saved with different permissions than expected from the php umask.
470        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
471        chmod($fn, $conf['fmode']);
472        msg($lang['uploadsucc'],1);
473        media_notify($id,$fn,$imime,$old);
474        // add a log entry to the media changelog
475        if ($REV){
476            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_REVERT, sprintf($lang['restored'], dformat($REV)), $REV);
477        } elseif ($overwrite) {
478            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT);
479        } else {
480            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created']);
481        }
482        return $id;
483    }else{
484        return array($lang['uploadfail'],-1);
485    }
486}
487
488/**
489 * Moves the current version of media file to the media_attic
490 * directory
491 *
492 * @author Kate Arzamastseva <pshns@ukr.net>
493 * @param string $id
494 * @return int - revision date
495 */
496function media_saveOldRevision($id){
497    global $conf, $lang;
498
499    $oldf = mediaFN($id);
500    if(!@file_exists($oldf)) return '';
501    $date = filemtime($oldf);
502    if (!$conf['mediarevisions']) return $date;
503
504    if (!getRevisionInfo($id, $date, 8192, true)) {
505        // there was an external edit,
506        // there is no log entry for current version of file
507        if (!@file_exists(mediaMetaFN($id,'.changes'))) {
508            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created']);
509        } else {
510            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_EDIT);
511        }
512    }
513
514    $newf = mediaFN($id,$date);
515    io_makeFileDir($newf);
516    if(copy($oldf, $newf)) {
517        // Set the correct permission here.
518        // Always chmod media because they may be saved with different permissions than expected from the php umask.
519        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
520        chmod($newf, $conf['fmode']);
521    }
522    return $date;
523}
524
525/**
526 * This function checks if the uploaded content is really what the
527 * mimetype says it is. We also do spam checking for text types here.
528 *
529 * We need to do this stuff because we can not rely on the browser
530 * to do this check correctly. Yes, IE is broken as usual.
531 *
532 * @author Andreas Gohr <andi@splitbrain.org>
533 * @link   http://www.splitbrain.org/blog/2007-02/12-internet_explorer_facilitates_cross_site_scripting
534 * @fixme  check all 26 magic IE filetypes here?
535 */
536function media_contentcheck($file,$mime){
537    global $conf;
538    if($conf['iexssprotect']){
539        $fh = @fopen($file, 'rb');
540        if($fh){
541            $bytes = fread($fh, 256);
542            fclose($fh);
543            if(preg_match('/<(script|a|img|html|body|iframe)[\s>]/i',$bytes)){
544                return -3;
545            }
546        }
547    }
548    if(substr($mime,0,6) == 'image/'){
549        $info = @getimagesize($file);
550        if($mime == 'image/gif' && $info[2] != 1){
551            return -1;
552        }elseif($mime == 'image/jpeg' && $info[2] != 2){
553            return -1;
554        }elseif($mime == 'image/png' && $info[2] != 3){
555            return -1;
556        }
557        # fixme maybe check other images types as well
558    }elseif(substr($mime,0,5) == 'text/'){
559        global $TEXT;
560        $TEXT = io_readFile($file);
561        if(checkwordblock()){
562            return -2;
563        }
564    }
565    return 0;
566}
567
568/**
569 * Send a notify mail on uploads
570 *
571 * @author Andreas Gohr <andi@splitbrain.org>
572 */
573function media_notify($id,$file,$mime,$old_rev=false){
574    global $conf;
575    if(empty($conf['notify'])) return false; //notify enabled?
576
577    $subscription = new Subscription();
578    return $subscription->send_media_diff($conf['notify'], 'uploadmail', $id, $old_rev);
579}
580
581/**
582 * List all files in a given Media namespace
583 */
584function media_filelist($ns,$auth=null,$jump='',$fullscreenview=false,$sort=false){
585    global $conf;
586    global $lang;
587    $ns = cleanID($ns);
588
589    // check auth our self if not given (needed for ajax calls)
590    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
591
592    if (!$fullscreenview) echo '<h1 id="media__ns">:'.hsc($ns).'</h1>'.NL;
593
594    if($auth < AUTH_READ){
595        // FIXME: print permission warning here instead?
596        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
597    }else{
598        if (!$fullscreenview) {
599            media_uploadform($ns, $auth);
600            media_searchform($ns);
601        }
602
603        $dir = utf8_encodeFN(str_replace(':','/',$ns));
604        $data = array();
605        search($data,$conf['mediadir'],'search_media',
606                array('showmsg'=>true,'depth'=>1),$dir,1,$sort);
607
608        if(!count($data)){
609            echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
610        }else {
611            if ($fullscreenview) {
612                echo '<ul class="' . _media_get_list_type() . '">';
613            }
614            foreach($data as $item){
615                if (!$fullscreenview) {
616                    media_printfile($item,$auth,$jump);
617                } else {
618                    media_printfile_thumbs($item,$auth,$jump);
619                }
620            }
621            if ($fullscreenview) echo '</ul>'.NL;
622        }
623    }
624}
625
626/**
627 * Prints tabs for files list actions
628 *
629 * @author Kate Arzamastseva <pshns@ukr.net>
630 * @author Adrian Lang <mail@adrianlang.de>
631 *
632 * @param string $selected_tab - opened tab
633 */
634
635function media_tabs_files($selected_tab = ''){
636    global $lang;
637    $tabs = array();
638    foreach(array('files'  => 'mediaselect',
639                  'upload' => 'media_uploadtab',
640                  'search' => 'media_searchtab') as $tab => $caption) {
641        $tabs[$tab] = array('href'    => media_managerURL(array('tab_files' => $tab), '&'),
642                            'caption' => $lang[$caption]);
643    }
644
645    html_tabs($tabs, $selected_tab);
646}
647
648/**
649 * Prints tabs for files details actions
650 *
651 * @author Kate Arzamastseva <pshns@ukr.net>
652 * @param string $image filename of the current image
653 * @param string $selected_tab opened tab
654 */
655function media_tabs_details($image, $selected_tab = ''){
656    global $lang, $conf;
657
658    $tabs = array();
659    $tabs['view'] = array('href'    => media_managerURL(array('tab_details' => 'view'), '&'),
660                          'caption' => $lang['media_viewtab']);
661
662    list(, $mime) = mimetype($image);
663    if ($mime == 'image/jpeg' && @file_exists(mediaFN($image))) {
664        $tabs['edit'] = array('href'    => media_managerURL(array('tab_details' => 'edit'), '&'),
665                              'caption' => $lang['media_edittab']);
666    }
667    if ($conf['mediarevisions']) {
668        $tabs['history'] = array('href'    => media_managerURL(array('tab_details' => 'history'), '&'),
669                                 'caption' => $lang['media_historytab']);
670    }
671
672    html_tabs($tabs, $selected_tab);
673}
674
675/**
676 * Prints options for the tab that displays a list of all files
677 *
678 * @author Kate Arzamastseva <pshns@ukr.net>
679 */
680function media_tab_files_options(){
681    global $lang;
682    global $INPUT;
683    global $ID;
684    $form = new Doku_Form(array('class' => 'options', 'method' => 'get',
685                                'action' => wl($ID)));
686    $media_manager_params = media_managerURL(array(), '', false, true);
687    foreach($media_manager_params as $pKey => $pVal){
688        $form->addHidden($pKey, $pVal);
689    }
690    $form->addHidden('sectok', null);
691    if ($INPUT->has('q')) {
692        $form->addHidden('q', $INPUT->str('q'));
693    }
694    $form->addElement('<ul>'.NL);
695    foreach(array('list' => array('listType', array('thumbs', 'rows')),
696                  'sort' => array('sortBy', array('name', 'date')))
697            as $group => $content) {
698        $checked = "_media_get_${group}_type";
699        $checked = $checked();
700
701        $form->addElement('<li class="' . $content[0] . '">');
702        foreach($content[1] as $option) {
703            $attrs = array();
704            if ($checked == $option) {
705                $attrs['checked'] = 'checked';
706            }
707            $form->addElement(form_makeRadioField($group . '_dwmedia', $option,
708                                       $lang['media_' . $group . '_' . $option],
709                                                  $content[0] . '__' . $option,
710                                                  $option, $attrs));
711        }
712        $form->addElement('</li>'.NL);
713    }
714    $form->addElement('<li>');
715    $form->addElement(form_makeButton('submit', '', $lang['btn_apply']));
716    $form->addElement('</li>'.NL);
717    $form->addElement('</ul>'.NL);
718    $form->printForm();
719}
720
721/**
722 * Returns type of sorting for the list of files in media manager
723 *
724 * @author Kate Arzamastseva <pshns@ukr.net>
725 * @return string - sort type
726 */
727function _media_get_sort_type() {
728    return _media_get_display_param('sort', array('default' => 'name', 'date'));
729}
730
731function _media_get_list_type() {
732    return _media_get_display_param('list', array('default' => 'thumbs', 'rows'));
733}
734
735function _media_get_display_param($param, $values) {
736    global $INPUT;
737    if (in_array($INPUT->str($param), $values)) {
738        // FIXME: Set cookie
739        return $INPUT->str($param);
740    } else {
741        $val = get_doku_pref($param, $values['default']);
742        if (!in_array($val, $values)) {
743            $val = $values['default'];
744        }
745        return $val;
746    }
747}
748
749/**
750 * Prints tab that displays a list of all files
751 *
752 * @author Kate Arzamastseva <pshns@ukr.net>
753 */
754function media_tab_files($ns,$auth=null,$jump='') {
755    global $lang;
756    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
757
758    if($auth < AUTH_READ){
759        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
760    }else{
761        media_filelist($ns,$auth,$jump,true,_media_get_sort_type());
762    }
763}
764
765/**
766 * Prints tab that displays uploading form
767 *
768 * @author Kate Arzamastseva <pshns@ukr.net>
769 */
770function media_tab_upload($ns,$auth=null,$jump='') {
771    global $lang;
772    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
773
774    echo '<div class="upload">'.NL;
775    if ($auth >= AUTH_UPLOAD) {
776        echo '<p>' . $lang['mediaupload'] . '</p>';
777    }
778    media_uploadform($ns, $auth, true);
779    echo '</div>'.NL;
780}
781
782/**
783 * Prints tab that displays search form
784 *
785 * @author Kate Arzamastseva <pshns@ukr.net>
786 */
787function media_tab_search($ns,$auth=null) {
788    global $INPUT;
789
790    $do = $INPUT->str('mediado');
791    $query = $INPUT->str('q');
792    echo '<div class="search">'.NL;
793
794    media_searchform($ns, $query, true);
795    if ($do == 'searchlist' || $query) {
796        media_searchlist($query,$ns,$auth,true,_media_get_sort_type());
797    }
798    echo '</div>'.NL;
799}
800
801/**
802 * Prints tab that displays mediafile details
803 *
804 * @author Kate Arzamastseva <pshns@ukr.net>
805 */
806function media_tab_view($image, $ns, $auth=null, $rev=false) {
807    global $lang;
808    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
809
810    if ($image && $auth >= AUTH_READ) {
811        $meta = new JpegMeta(mediaFN($image, $rev));
812        media_preview($image, $auth, $rev, $meta);
813        media_preview_buttons($image, $auth, $rev);
814        media_details($image, $auth, $rev, $meta);
815
816    } else {
817        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
818    }
819}
820
821/**
822 * Prints tab that displays form for editing mediafile metadata
823 *
824 * @author Kate Arzamastseva <pshns@ukr.net>
825 */
826function media_tab_edit($image, $ns, $auth=null) {
827    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
828
829    if ($image) {
830        list(, $mime) = mimetype($image);
831        if ($mime == 'image/jpeg') media_metaform($image,$auth);
832    }
833}
834
835/**
836 * Prints tab that displays mediafile revisions
837 *
838 * @author Kate Arzamastseva <pshns@ukr.net>
839 */
840function media_tab_history($image, $ns, $auth=null) {
841    global $lang;
842    global $INPUT;
843
844    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
845    $do = $INPUT->str('mediado');
846
847    if ($auth >= AUTH_READ && $image) {
848        if ($do == 'diff'){
849            media_diff($image, $ns, $auth);
850        } else {
851            $first = $INPUT->int('first');
852            html_revisions($first, $image);
853        }
854    } else {
855        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
856    }
857}
858
859/**
860 * Prints mediafile details
861 *
862 * @author Kate Arzamastseva <pshns@ukr.net>
863 */
864function media_preview($image, $auth, $rev=false, $meta=false) {
865
866    $size = media_image_preview_size($image, $rev, $meta);
867
868    if ($size) {
869        global $lang;
870        echo '<div class="image">';
871
872        $more = array();
873        if ($rev) {
874            $more['rev'] = $rev;
875        } else {
876            $t = @filemtime(mediaFN($image));
877            $more['t'] = $t;
878        }
879
880        $more['w'] = $size[0];
881        $more['h'] = $size[1];
882        $src = ml($image, $more);
883
884        echo '<a href="'.$src.'" target="_blank" title="'.$lang['mediaview'].'">';
885        echo '<img src="'.$src.'" alt="" style="max-width: '.$size[0].'px;" />';
886        echo '</a>';
887
888        echo '</div>'.NL;
889    }
890}
891
892/**
893 * Prints mediafile action buttons
894 *
895 * @author Kate Arzamastseva <pshns@ukr.net>
896 */
897function media_preview_buttons($image, $auth, $rev=false) {
898    global $lang, $conf;
899
900    echo '<ul class="actions">'.NL;
901
902    if($auth >= AUTH_DELETE && !$rev && @file_exists(mediaFN($image))){
903
904        // delete button
905        $form = new Doku_Form(array('id' => 'mediamanager__btn_delete',
906            'action'=>media_managerURL(array('delete' => $image), '&')));
907        $form->addElement(form_makeButton('submit','',$lang['btn_delete']));
908        echo '<li>';
909        $form->printForm();
910        echo '</li>'.NL;
911    }
912
913    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
914    if($auth >= $auth_ow && !$rev){
915
916        // upload new version button
917        $form = new Doku_Form(array('id' => 'mediamanager__btn_update',
918            'action'=>media_managerURL(array('image' => $image, 'mediado' => 'update'), '&')));
919        $form->addElement(form_makeButton('submit','',$lang['media_update']));
920        echo '<li>';
921        $form->printForm();
922        echo '</li>'.NL;
923    }
924
925    if($auth >= AUTH_UPLOAD && $rev && $conf['mediarevisions'] && @file_exists(mediaFN($image, $rev))){
926
927        // restore button
928        $form = new Doku_Form(array('id' => 'mediamanager__btn_restore',
929            'action'=>media_managerURL(array('image' => $image), '&')));
930        $form->addHidden('mediado','restore');
931        $form->addHidden('rev',$rev);
932        $form->addElement(form_makeButton('submit','',$lang['media_restore']));
933        echo '<li>';
934        $form->printForm();
935        echo '</li>'.NL;
936    }
937
938    echo '</ul>'.NL;
939}
940
941/**
942 * Returns image width and height for mediamanager preview panel
943 *
944 * @author Kate Arzamastseva <pshns@ukr.net>
945 * @param string   $image
946 * @param int      $rev
947 * @param JpegMeta $meta
948 * @param int      $size
949 * @return array
950 */
951function media_image_preview_size($image, $rev, $meta, $size = 500) {
952    if (!preg_match("/\.(jpe?g|gif|png)$/", $image) || !file_exists(mediaFN($image, $rev))) return false;
953
954    $info = getimagesize(mediaFN($image, $rev));
955    $w = (int) $info[0];
956    $h = (int) $info[1];
957
958    if($meta && ($w > $size || $h > $size)){
959        $ratio = $meta->getResizeRatio($size, $size);
960        $w = floor($w * $ratio);
961        $h = floor($h * $ratio);
962    }
963    return array($w, $h);
964}
965
966/**
967 * Returns the requested EXIF/IPTC tag from the image meta
968 *
969 * @author Kate Arzamastseva <pshns@ukr.net>
970 * @param array $tags
971 * @param JpegMeta $meta
972 * @param string $alt
973 * @return string
974 */
975function media_getTag($tags,$meta,$alt=''){
976    if($meta === false) return $alt;
977    $info = $meta->getField($tags);
978    if($info == false) return $alt;
979    return $info;
980}
981
982/**
983 * Returns mediafile tags
984 *
985 * @author Kate Arzamastseva <pshns@ukr.net>
986 * @param JpegMeta $meta
987 * @return array
988 */
989function media_file_tags($meta) {
990    // load the field descriptions
991    static $fields = null;
992    if(is_null($fields)){
993        $config_files = getConfigFiles('mediameta');
994        foreach ($config_files as $config_file) {
995            if(@file_exists($config_file)) include($config_file);
996        }
997    }
998
999    $tags = array();
1000
1001    foreach($fields as $key => $tag){
1002        $t = array();
1003        if (!empty($tag[0])) $t = array($tag[0]);
1004        if(is_array($tag[3])) $t = array_merge($t,$tag[3]);
1005        $value = media_getTag($t, $meta);
1006        $tags[] = array('tag' => $tag, 'value' => $value);
1007    }
1008
1009    return $tags;
1010}
1011
1012/**
1013 * Prints mediafile tags
1014 *
1015 * @author Kate Arzamastseva <pshns@ukr.net>
1016 */
1017function media_details($image, $auth, $rev=false, $meta=false) {
1018    global $lang;
1019
1020    if (!$meta) $meta = new JpegMeta(mediaFN($image, $rev));
1021    $tags = media_file_tags($meta);
1022
1023    echo '<dl>'.NL;
1024    foreach($tags as $tag){
1025        if ($tag['value']) {
1026            $value = cleanText($tag['value']);
1027            echo '<dt>'.$lang[$tag['tag'][1]].':</dt><dd>';
1028            if ($tag['tag'][2] == 'date') echo dformat($value);
1029            else echo hsc($value);
1030            echo '</dd>'.NL;
1031        }
1032    }
1033    echo '</dl>'.NL;
1034}
1035
1036/**
1037 * Shows difference between two revisions of file
1038 *
1039 * @author Kate Arzamastseva <pshns@ukr.net>
1040 */
1041function media_diff($image, $ns, $auth, $fromajax = false) {
1042    global $conf;
1043    global $INPUT;
1044
1045    if ($auth < AUTH_READ || !$image || !$conf['mediarevisions']) return '';
1046
1047    $rev1 = $INPUT->int('rev');
1048
1049    $rev2 = $INPUT->ref('rev2');
1050    if(is_array($rev2)){
1051        $rev1 = (int) $rev2[0];
1052        $rev2 = (int) $rev2[1];
1053
1054        if(!$rev1){
1055            $rev1 = $rev2;
1056            unset($rev2);
1057        }
1058    }else{
1059        $rev2 = $INPUT->int('rev2');
1060    }
1061
1062    if ($rev1 && !file_exists(mediaFN($image, $rev1))) $rev1 = false;
1063    if ($rev2 && !file_exists(mediaFN($image, $rev2))) $rev2 = false;
1064
1065    if($rev1 && $rev2){            // two specific revisions wanted
1066        // make sure order is correct (older on the left)
1067        if($rev1 < $rev2){
1068            $l_rev = $rev1;
1069            $r_rev = $rev2;
1070        }else{
1071            $l_rev = $rev2;
1072            $r_rev = $rev1;
1073        }
1074    }elseif($rev1){                // single revision given, compare to current
1075        $r_rev = '';
1076        $l_rev = $rev1;
1077    }else{                        // no revision was given, compare previous to current
1078        $r_rev = '';
1079        $revs = getRevisions($image, 0, 1, 8192, true);
1080        if (file_exists(mediaFN($image, $revs[0]))) {
1081            $l_rev = $revs[0];
1082        } else {
1083            $l_rev = '';
1084        }
1085    }
1086
1087    // prepare event data
1088    $data[0] = $image;
1089    $data[1] = $l_rev;
1090    $data[2] = $r_rev;
1091    $data[3] = $ns;
1092    $data[4] = $auth;
1093    $data[5] = $fromajax;
1094
1095    // trigger event
1096    return trigger_event('MEDIA_DIFF', $data, '_media_file_diff', true);
1097
1098}
1099
1100function _media_file_diff($data) {
1101    if(is_array($data) && count($data)===6) {
1102        return media_file_diff($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
1103    } else {
1104        return false;
1105    }
1106}
1107
1108/**
1109 * Shows difference between two revisions of image
1110 *
1111 * @author Kate Arzamastseva <pshns@ukr.net>
1112 */
1113function media_file_diff($image, $l_rev, $r_rev, $ns, $auth, $fromajax){
1114    global $lang;
1115    global $INPUT;
1116
1117    $l_meta = new JpegMeta(mediaFN($image, $l_rev));
1118    $r_meta = new JpegMeta(mediaFN($image, $r_rev));
1119
1120    $is_img = preg_match('/\.(jpe?g|gif|png)$/', $image);
1121    if ($is_img) {
1122        $l_size = media_image_preview_size($image, $l_rev, $l_meta);
1123        $r_size = media_image_preview_size($image, $r_rev, $r_meta);
1124        $is_img = ($l_size && $r_size && ($l_size[0] >= 30 || $r_size[0] >= 30));
1125
1126        $difftype = $INPUT->str('difftype');
1127
1128        if (!$fromajax) {
1129            $form = new Doku_Form(array(
1130                'action' => media_managerURL(array(), '&'),
1131                'method' => 'get',
1132                'id' => 'mediamanager__form_diffview',
1133                'class' => 'diffView'
1134            ));
1135            $form->addHidden('sectok', null);
1136            $form->addElement('<input type="hidden" name="rev2[]" value="'.$l_rev.'" ></input>');
1137            $form->addElement('<input type="hidden" name="rev2[]" value="'.$r_rev.'" ></input>');
1138            $form->addHidden('mediado', 'diff');
1139            $form->printForm();
1140
1141            echo NL.'<div id="mediamanager__diff" >'.NL;
1142        }
1143
1144        if ($difftype == 'opacity' || $difftype == 'portions') {
1145            media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $difftype);
1146            if (!$fromajax) echo '</div>';
1147            return;
1148        }
1149    }
1150
1151    list($l_head, $r_head) = html_diff_head($l_rev, $r_rev, $image, true);
1152
1153    ?>
1154    <div class="table">
1155    <table>
1156      <tr>
1157        <th><?php echo $l_head; ?></th>
1158        <th><?php echo $r_head; ?></th>
1159      </tr>
1160    <?php
1161
1162    echo '<tr class="image">';
1163    echo '<td>';
1164    media_preview($image, $auth, $l_rev, $l_meta);
1165    echo '</td>';
1166
1167    echo '<td>';
1168    media_preview($image, $auth, $r_rev, $r_meta);
1169    echo '</td>';
1170    echo '</tr>'.NL;
1171
1172    echo '<tr class="actions">';
1173    echo '<td>';
1174    media_preview_buttons($image, $auth, $l_rev);
1175    echo '</td>';
1176
1177    echo '<td>';
1178    media_preview_buttons($image, $auth, $r_rev);
1179    echo '</td>';
1180    echo '</tr>'.NL;
1181
1182    $l_tags = media_file_tags($l_meta);
1183    $r_tags = media_file_tags($r_meta);
1184    // FIXME r_tags-only stuff
1185    foreach ($l_tags as $key => $l_tag) {
1186        if ($l_tag['value'] != $r_tags[$key]['value']) {
1187            $r_tags[$key]['highlighted'] = true;
1188            $l_tags[$key]['highlighted'] = true;
1189        } else if (!$l_tag['value'] || !$r_tags[$key]['value']) {
1190            unset($r_tags[$key]);
1191            unset($l_tags[$key]);
1192        }
1193    }
1194
1195    echo '<tr>';
1196    foreach(array($l_tags,$r_tags) as $tags){
1197        echo '<td>'.NL;
1198
1199        echo '<dl class="img_tags">';
1200        foreach($tags as $tag){
1201            $value = cleanText($tag['value']);
1202            if (!$value) $value = '-';
1203            echo '<dt>'.$lang[$tag['tag'][1]].':</dt>';
1204            echo '<dd>';
1205            if ($tag['highlighted']) {
1206                echo '<strong>';
1207            }
1208            if ($tag['tag'][2] == 'date') echo dformat($value);
1209            else echo hsc($value);
1210            if ($tag['highlighted']) {
1211                echo '</strong>';
1212            }
1213            echo '</dd>';
1214        }
1215        echo '</dl>'.NL;
1216
1217        echo '</td>';
1218    }
1219    echo '</tr>'.NL;
1220
1221    echo '</table>'.NL;
1222    echo '</div>'.NL;
1223
1224    if ($is_img && !$fromajax) echo '</div>';
1225}
1226
1227/**
1228 * Prints two images side by side
1229 * and slider
1230 *
1231 * @author Kate Arzamastseva <pshns@ukr.net>
1232 * @param string $image
1233 * @param int $l_rev
1234 * @param int $r_rev
1235 * @param array $l_size
1236 * @param array $r_size
1237 * @param string $type
1238 */
1239function media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $type) {
1240    if ($l_size != $r_size) {
1241        if ($r_size[0] > $l_size[0]) {
1242            $l_size = $r_size;
1243        }
1244    }
1245
1246    $l_more = array('rev' => $l_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1247    $r_more = array('rev' => $r_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1248
1249    $l_src = ml($image, $l_more);
1250    $r_src = ml($image, $r_more);
1251
1252    // slider
1253    echo '<div class="slider" style="max-width: '.($l_size[0]-20).'px;" ></div>'.NL;
1254
1255    // two images in divs
1256    echo '<div class="imageDiff ' . $type . '">'.NL;
1257    echo '<div class="image1" style="max-width: '.$l_size[0].'px;">';
1258    echo '<img src="'.$l_src.'" alt="" />';
1259    echo '</div>'.NL;
1260    echo '<div class="image2" style="max-width: '.$l_size[0].'px;">';
1261    echo '<img src="'.$r_src.'" alt="" />';
1262    echo '</div>'.NL;
1263    echo '</div>'.NL;
1264}
1265
1266/**
1267 * Restores an old revision of a media file
1268 *
1269 * @param string $image
1270 * @param int $rev
1271 * @param int $auth
1272 * @return string - file's id
1273 * @author Kate Arzamastseva <pshns@ukr.net>
1274 */
1275function media_restore($image, $rev, $auth){
1276    global $conf;
1277    if ($auth < AUTH_UPLOAD || !$conf['mediarevisions']) return false;
1278    $removed = (!file_exists(mediaFN($image)) && file_exists(mediaMetaFN($image, '.changes')));
1279    if (!$image || (!file_exists(mediaFN($image)) && !$removed)) return false;
1280    if (!$rev || !file_exists(mediaFN($image, $rev))) return false;
1281    list(,$imime,) = mimetype($image);
1282    $res = media_upload_finish(mediaFN($image, $rev),
1283        mediaFN($image),
1284        $image,
1285        $imime,
1286        true,
1287        'copy');
1288    if (is_array($res)) {
1289        msg($res[0], $res[1]);
1290        return false;
1291    }
1292    return $res;
1293}
1294
1295/**
1296 * List all files found by the search request
1297 *
1298 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1299 * @author Andreas Gohr <gohr@cosmocode.de>
1300 * @author Kate Arzamastseva <pshns@ukr.net>
1301 * @triggers MEDIA_SEARCH
1302 */
1303function media_searchlist($query,$ns,$auth=null,$fullscreen=false,$sort='natural'){
1304    global $conf;
1305    global $lang;
1306
1307    $ns = cleanID($ns);
1308
1309    if ($query) {
1310        $evdata = array(
1311                'ns'    => $ns,
1312                'data'  => array(),
1313                'query' => $query
1314                );
1315        $evt = new Doku_Event('MEDIA_SEARCH', $evdata);
1316        if ($evt->advise_before()) {
1317            $dir = utf8_encodeFN(str_replace(':','/',$evdata['ns']));
1318            $pattern = '/'.preg_quote($evdata['query'],'/').'/i';
1319            search($evdata['data'],
1320                    $conf['mediadir'],
1321                    'search_media',
1322                    array('showmsg'=>false,'pattern'=>$pattern),
1323                    $dir,
1324                    1,
1325                    $sort);
1326        }
1327        $evt->advise_after();
1328        unset($evt);
1329    }
1330
1331    if (!$fullscreen) {
1332        echo '<h1 id="media__ns">'.sprintf($lang['searchmedia_in'],hsc($ns).':*').'</h1>'.NL;
1333        media_searchform($ns,$query);
1334    }
1335
1336    if(!count($evdata['data'])){
1337        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
1338    }else {
1339        if ($fullscreen) {
1340            echo '<ul class="' . _media_get_list_type() . '">';
1341        }
1342        foreach($evdata['data'] as $item){
1343            if (!$fullscreen) media_printfile($item,$item['perm'],'',true);
1344            else media_printfile_thumbs($item,$item['perm'],false,true);
1345        }
1346        if ($fullscreen) echo '</ul>'.NL;
1347    }
1348}
1349
1350/**
1351 * Formats and prints one file in the list
1352 */
1353function media_printfile($item,$auth,$jump,$display_namespace=false){
1354    global $lang;
1355    global $conf;
1356
1357    // Prepare zebra coloring
1358    // I always wanted to use this variable name :-D
1359    static $twibble = 1;
1360    $twibble *= -1;
1361    $zebra = ($twibble == -1) ? 'odd' : 'even';
1362
1363    // Automatically jump to recent action
1364    if($jump == $item['id']) {
1365        $jump = ' id="scroll__here" ';
1366    }else{
1367        $jump = '';
1368    }
1369
1370    // Prepare fileicons
1371    list($ext) = mimetype($item['file'],false);
1372    $class = preg_replace('/[^_\-a-z0-9]+/i','_',$ext);
1373    $class = 'select mediafile mf_'.$class;
1374
1375    // Prepare filename
1376    $file = utf8_decodeFN($item['file']);
1377
1378    // Prepare info
1379    $info = '';
1380    if($item['isimg']){
1381        $info .= (int) $item['meta']->getField('File.Width');
1382        $info .= '&#215;';
1383        $info .= (int) $item['meta']->getField('File.Height');
1384        $info .= ' ';
1385    }
1386    $info .= '<i>'.dformat($item['mtime']).'</i>';
1387    $info .= ' ';
1388    $info .= filesize_h($item['size']);
1389
1390    // output
1391    echo '<div class="'.$zebra.'"'.$jump.' title="'.hsc($item['id']).'">'.NL;
1392    if (!$display_namespace) {
1393        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($file).'</a> ';
1394    } else {
1395        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($item['id']).'</a><br/>';
1396    }
1397    echo '<span class="info">('.$info.')</span>'.NL;
1398
1399    // view button
1400    $link = ml($item['id'],'',true);
1401    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/magnifier.png" '.
1402        'alt="'.$lang['mediaview'].'" title="'.$lang['mediaview'].'" class="btn" /></a>';
1403
1404    // mediamanager button
1405    $link = wl('',array('do'=>'media','image'=>$item['id'],'ns'=>getNS($item['id'])));
1406    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/mediamanager.png" '.
1407        'alt="'.$lang['btn_media'].'" title="'.$lang['btn_media'].'" class="btn" /></a>';
1408
1409    // delete button
1410    if($item['writable'] && $auth >= AUTH_DELETE){
1411        $link = DOKU_BASE.'lib/exe/mediamanager.php?delete='.rawurlencode($item['id']).
1412            '&amp;sectok='.getSecurityToken();
1413        echo ' <a href="'.$link.'" class="btn_media_delete" title="'.$item['id'].'">'.
1414            '<img src="'.DOKU_BASE.'lib/images/trash.png" alt="'.$lang['btn_delete'].'" '.
1415            'title="'.$lang['btn_delete'].'" class="btn" /></a>';
1416    }
1417
1418    echo '<div class="example" id="ex_'.str_replace(':','_',$item['id']).'">';
1419    echo $lang['mediausage'].' <code>{{:'.$item['id'].'}}</code>';
1420    echo '</div>';
1421    if($item['isimg']) media_printimgdetail($item);
1422    echo '<div class="clearer"></div>'.NL;
1423    echo '</div>'.NL;
1424}
1425
1426function media_printicon($filename){
1427    list($ext) = mimetype(mediaFN($filename),false);
1428
1429    if (@file_exists(DOKU_INC.'lib/images/fileicons/'.$ext.'.png')) {
1430        $icon = DOKU_BASE.'lib/images/fileicons/'.$ext.'.png';
1431    } else {
1432        $icon = DOKU_BASE.'lib/images/fileicons/file.png';
1433    }
1434
1435    return '<img src="'.$icon.'" alt="'.$filename.'" class="icon" />';
1436
1437}
1438
1439/**
1440 * Formats and prints one file in the list in the thumbnails view
1441 *
1442 * @author Kate Arzamastseva <pshns@ukr.net>
1443 */
1444function media_printfile_thumbs($item,$auth,$jump=false,$display_namespace=false){
1445
1446    // Prepare filename
1447    $file = utf8_decodeFN($item['file']);
1448
1449    // output
1450    echo '<li><dl title="'.hsc($item['id']).'">'.NL;
1451
1452        echo '<dt>';
1453    if($item['isimg']) {
1454        media_printimgdetail($item, true);
1455
1456    } else {
1457        echo '<a id="d_:'.$item['id'].'" class="image" title="'.$item['id'].'" href="'.
1458            media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1459            'tab_details' => 'view')).'">';
1460        echo media_printicon($item['id']);
1461        echo '</a>';
1462    }
1463    echo '</dt>'.NL;
1464    if (!$display_namespace) {
1465        $name = hsc($file);
1466    } else {
1467        $name = hsc($item['id']);
1468    }
1469    echo '<dd class="name"><a href="'.media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1470        'tab_details' => 'view')).'" id="h_:'.$item['id'].'">'.$name.'</a></dd>'.NL;
1471
1472    if($item['isimg']){
1473        $size = '';
1474        $size .= (int) $item['meta']->getField('File.Width');
1475        $size .= '&#215;';
1476        $size .= (int) $item['meta']->getField('File.Height');
1477        echo '<dd class="size">'.$size.'</dd>'.NL;
1478    } else {
1479        echo '<dd class="size">&#160;</dd>'.NL;
1480    }
1481    $date = dformat($item['mtime']);
1482    echo '<dd class="date">'.$date.'</dd>'.NL;
1483    $filesize = filesize_h($item['size']);
1484    echo '<dd class="filesize">'.$filesize.'</dd>'.NL;
1485    echo '</dl></li>'.NL;
1486}
1487
1488/**
1489 * Prints a thumbnail and metainfo
1490 */
1491function media_printimgdetail($item, $fullscreen=false){
1492    // prepare thumbnail
1493    $size = $fullscreen ? 90 : 120;
1494
1495    $w = (int) $item['meta']->getField('File.Width');
1496    $h = (int) $item['meta']->getField('File.Height');
1497    if($w>$size || $h>$size){
1498        if (!$fullscreen) {
1499            $ratio = $item['meta']->getResizeRatio($size);
1500        } else {
1501            $ratio = $item['meta']->getResizeRatio($size,$size);
1502        }
1503        $w = floor($w * $ratio);
1504        $h = floor($h * $ratio);
1505    }
1506    $src = ml($item['id'],array('w'=>$w,'h'=>$h,'t'=>$item['mtime']));
1507    $p = array();
1508    if (!$fullscreen) {
1509        // In fullscreen mediamanager view, image resizing is done via CSS.
1510        $p['width']  = $w;
1511        $p['height'] = $h;
1512    }
1513    $p['alt']    = $item['id'];
1514    $att = buildAttributes($p);
1515
1516    // output
1517    if ($fullscreen) {
1518        echo '<a id="l_:'.$item['id'].'" class="image thumb" href="'.
1519            media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']), 'tab_details' => 'view')).'">';
1520        echo '<img src="'.$src.'" '.$att.' />';
1521        echo '</a>';
1522    }
1523
1524    if ($fullscreen) return;
1525
1526    echo '<div class="detail">';
1527    echo '<div class="thumb">';
1528    echo '<a id="d_:'.$item['id'].'" class="select">';
1529    echo '<img src="'.$src.'" '.$att.' />';
1530    echo '</a>';
1531    echo '</div>';
1532
1533    // read EXIF/IPTC data
1534    $t = $item['meta']->getField(array('IPTC.Headline','xmp.dc:title'));
1535    $d = $item['meta']->getField(array('IPTC.Caption','EXIF.UserComment',
1536                'EXIF.TIFFImageDescription',
1537                'EXIF.TIFFUserComment'));
1538    if(utf8_strlen($d) > 250) $d = utf8_substr($d,0,250).'...';
1539    $k = $item['meta']->getField(array('IPTC.Keywords','IPTC.Category','xmp.dc:subject'));
1540
1541    // print EXIF/IPTC data
1542    if($t || $d || $k ){
1543        echo '<p>';
1544        if($t) echo '<strong>'.htmlspecialchars($t).'</strong><br />';
1545        if($d) echo htmlspecialchars($d).'<br />';
1546        if($t) echo '<em>'.htmlspecialchars($k).'</em>';
1547        echo '</p>';
1548    }
1549    echo '</div>';
1550}
1551
1552/**
1553 * Build link based on the current, adding/rewriting
1554 * parameters
1555 *
1556 * @author Kate Arzamastseva <pshns@ukr.net>
1557 * @param array|bool $params
1558 * @param string     $amp - separator
1559 * @param bool       $abs
1560 * @param bool       $params_array
1561 * @return string - link
1562 */
1563function media_managerURL($params=false, $amp='&amp;', $abs=false, $params_array=false) {
1564    global $ID;
1565    global $INPUT;
1566
1567    $gets = array('do' => 'media');
1568    $media_manager_params = array('tab_files', 'tab_details', 'image', 'ns', 'list', 'sort');
1569    foreach ($media_manager_params as $x) {
1570        if ($INPUT->has($x)) $gets[$x] = $INPUT->str($x);
1571    }
1572
1573    if ($params) {
1574        $gets = $params + $gets;
1575    }
1576    unset($gets['id']);
1577    if (isset($gets['delete'])) {
1578        unset($gets['image']);
1579        unset($gets['tab_details']);
1580    }
1581
1582    if ($params_array) return $gets;
1583
1584    return wl($ID,$gets,$abs,$amp);
1585}
1586
1587/**
1588 * Print the media upload form if permissions are correct
1589 *
1590 * @author Andreas Gohr <andi@splitbrain.org>
1591 * @author Kate Arzamastseva <pshns@ukr.net>
1592 */
1593function media_uploadform($ns, $auth, $fullscreen = false){
1594    global $lang;
1595    global $conf;
1596    global $INPUT;
1597
1598    if($auth < AUTH_UPLOAD) {
1599        echo '<div class="nothing">'.$lang['media_perm_upload'].'</div>'.NL;
1600        return;
1601    }
1602    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
1603
1604    $update = false;
1605    $id = '';
1606    if ($auth >= $auth_ow && $fullscreen && $INPUT->str('mediado') == 'update') {
1607        $update = true;
1608        $id = cleanID($INPUT->str('image'));
1609    }
1610
1611    // The default HTML upload form
1612    $params = array('id'      => 'dw__upload',
1613                    'enctype' => 'multipart/form-data');
1614    if (!$fullscreen) {
1615        $params['action'] = DOKU_BASE.'lib/exe/mediamanager.php';
1616    } else {
1617        $params['action'] = media_managerURL(array('tab_files' => 'files',
1618            'tab_details' => 'view'), '&');
1619    }
1620
1621    $form = new Doku_Form($params);
1622    if (!$fullscreen) echo '<div class="upload">' . $lang['mediaupload'] . '</div>';
1623    $form->addElement(formSecurityToken());
1624    $form->addHidden('ns', hsc($ns));
1625    $form->addElement(form_makeOpenTag('p'));
1626    $form->addElement(form_makeFileField('upload', $lang['txt_upload'].':', 'upload__file'));
1627    $form->addElement(form_makeCloseTag('p'));
1628    $form->addElement(form_makeOpenTag('p'));
1629    $form->addElement(form_makeTextField('mediaid', noNS($id), $lang['txt_filename'].':', 'upload__name'));
1630    $form->addElement(form_makeButton('submit', '', $lang['btn_upload']));
1631    $form->addElement(form_makeCloseTag('p'));
1632
1633    if($auth >= $auth_ow){
1634        $form->addElement(form_makeOpenTag('p'));
1635        $attrs = array();
1636        if ($update) $attrs['checked'] = 'checked';
1637        $form->addElement(form_makeCheckboxField('ow', 1, $lang['txt_overwrt'], 'dw__ow', 'check', $attrs));
1638        $form->addElement(form_makeCloseTag('p'));
1639    }
1640
1641    echo NL.'<div id="mediamanager__uploader">'.NL;
1642    html_form('upload', $form);
1643
1644    echo '</div>'.NL;
1645
1646    echo '<p class="maxsize">';
1647    printf($lang['maxuploadsize'],filesize_h(media_getuploadsize()));
1648    echo '</p>'.NL;
1649
1650}
1651
1652/**
1653 * Returns the size uploaded files may have
1654 *
1655 * This uses a conservative approach using the lowest number found
1656 * in any of the limiting ini settings
1657 *
1658 * @returns int size in bytes
1659 */
1660function media_getuploadsize(){
1661    $okay = 0;
1662
1663    $post = (int) php_to_byte(@ini_get('post_max_size'));
1664    $suho = (int) php_to_byte(@ini_get('suhosin.post.max_value_length'));
1665    $upld = (int) php_to_byte(@ini_get('upload_max_filesize'));
1666
1667    if($post && ($post < $okay || $okay == 0)) $okay = $post;
1668    if($suho && ($suho < $okay || $okay == 0)) $okay = $suho;
1669    if($upld && ($upld < $okay || $okay == 0)) $okay = $upld;
1670
1671    return $okay;
1672}
1673
1674/**
1675 * Print the search field form
1676 *
1677 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1678 * @author Kate Arzamastseva <pshns@ukr.net>
1679 */
1680function media_searchform($ns,$query='',$fullscreen=false){
1681    global $lang;
1682
1683    // The default HTML search form
1684    $params = array('id' => 'dw__mediasearch');
1685    if (!$fullscreen) {
1686        $params['action'] = DOKU_BASE.'lib/exe/mediamanager.php';
1687    } else {
1688        $params['action'] = media_managerURL(array(), '&');
1689    }
1690    $form = new Doku_Form($params);
1691    $form->addHidden('ns', $ns);
1692    $form->addHidden($fullscreen ? 'mediado' : 'do', 'searchlist');
1693
1694    if (!$fullscreen) $form->addElement('<div class="upload">' . $lang['mediasearch'] . '</div>'.NL);
1695    $form->addElement(form_makeOpenTag('p'));
1696    $form->addElement(form_makeTextField('q', $query,$lang['searchmedia'],'','',array('title'=>sprintf($lang['searchmedia_in'],hsc($ns).':*'))));
1697    $form->addElement(form_makeButton('submit', '', $lang['btn_search']));
1698    $form->addElement(form_makeCloseTag('p'));
1699    html_form('searchmedia', $form);
1700}
1701
1702/**
1703 * Build a tree outline of available media namespaces
1704 *
1705 * @author Andreas Gohr <andi@splitbrain.org>
1706 */
1707function media_nstree($ns){
1708    global $conf;
1709    global $lang;
1710
1711    // currently selected namespace
1712    $ns  = cleanID($ns);
1713    if(empty($ns)){
1714        global $ID;
1715        $ns = (string)getNS($ID);
1716    }
1717
1718    $ns_dir  = utf8_encodeFN(str_replace(':','/',$ns));
1719
1720    $data = array();
1721    search($data,$conf['mediadir'],'search_index',array('ns' => $ns_dir, 'nofiles' => true));
1722
1723    // wrap a list with the root level around the other namespaces
1724    array_unshift($data, array('level' => 0, 'id' => '', 'open' =>'true',
1725                               'label' => '['.$lang['mediaroot'].']'));
1726
1727    // insert the current ns into the hierarchy if it isn't already part of it
1728    $ns_parts = explode(':', $ns);
1729    $tmp_ns = '';
1730    $pos = 0;
1731    foreach ($ns_parts as $level => $part) {
1732        if ($tmp_ns) $tmp_ns .= ':'.$part;
1733        else $tmp_ns = $part;
1734
1735        // find the namespace parts or insert them
1736        while ($data[$pos]['id'] != $tmp_ns) {
1737            if ($pos >= count($data) || ($data[$pos]['level'] <= $level+1 && strnatcmp(utf8_encodeFN($data[$pos]['id']), utf8_encodeFN($tmp_ns)) > 0)) {
1738                array_splice($data, $pos, 0, array(array('level' => $level+1, 'id' => $tmp_ns, 'open' => 'true')));
1739                break;
1740            }
1741            ++$pos;
1742        }
1743    }
1744
1745    echo html_buildlist($data,'idx','media_nstree_item','media_nstree_li');
1746}
1747
1748/**
1749 * Userfunction for html_buildlist
1750 *
1751 * Prints a media namespace tree item
1752 *
1753 * @author Andreas Gohr <andi@splitbrain.org>
1754 */
1755function media_nstree_item($item){
1756    global $INPUT;
1757    $pos   = strrpos($item['id'], ':');
1758    $label = substr($item['id'], $pos > 0 ? $pos + 1 : 0);
1759    if(!$item['label']) $item['label'] = $label;
1760
1761    $ret  = '';
1762    if (!($INPUT->str('do') == 'media'))
1763    $ret .= '<a href="'.DOKU_BASE.'lib/exe/mediamanager.php?ns='.idfilter($item['id']).'" class="idx_dir">';
1764    else $ret .= '<a href="'.media_managerURL(array('ns' => idfilter($item['id'], false), 'tab_files' => 'files'))
1765        .'" class="idx_dir">';
1766    $ret .= $item['label'];
1767    $ret .= '</a>';
1768    return $ret;
1769}
1770
1771/**
1772 * Userfunction for html_buildlist
1773 *
1774 * Prints a media namespace tree item opener
1775 *
1776 * @author Andreas Gohr <andi@splitbrain.org>
1777 */
1778function media_nstree_li($item){
1779    $class='media level'.$item['level'];
1780    if($item['open']){
1781        $class .= ' open';
1782        $img   = DOKU_BASE.'lib/images/minus.gif';
1783        $alt   = '−';
1784    }else{
1785        $class .= ' closed';
1786        $img   = DOKU_BASE.'lib/images/plus.gif';
1787        $alt   = '+';
1788    }
1789    // TODO: only deliver an image if it actually has a subtree...
1790    return '<li class="'.$class.'">'.
1791        '<img src="'.$img.'" alt="'.$alt.'" />';
1792}
1793
1794/**
1795 * Resizes the given image to the given size
1796 *
1797 * @author  Andreas Gohr <andi@splitbrain.org>
1798 */
1799function media_resize_image($file, $ext, $w, $h=0){
1800    global $conf;
1801
1802    $info = @getimagesize($file); //get original size
1803    if($info == false) return $file; // that's no image - it's a spaceship!
1804
1805    if(!$h) $h = round(($w * $info[1]) / $info[0]);
1806    if(!$w) $w = round(($h * $info[0]) / $info[1]);
1807
1808    // we wont scale up to infinity
1809    if($w > 2000 || $h > 2000) return $file;
1810
1811    // resize necessary? - (w,h) = native dimensions
1812    if(($w == $info[0]) && ($h == $info[1])) return $file;
1813
1814    //cache
1815    $local = getCacheName($file,'.media.'.$w.'x'.$h.'.'.$ext);
1816    $mtime = @filemtime($local); // 0 if not exists
1817
1818    if( $mtime > filemtime($file) ||
1819            media_resize_imageIM($ext,$file,$info[0],$info[1],$local,$w,$h) ||
1820            media_resize_imageGD($ext,$file,$info[0],$info[1],$local,$w,$h) ){
1821        if($conf['fperm']) @chmod($local, $conf['fperm']);
1822        return $local;
1823    }
1824    //still here? resizing failed
1825    return $file;
1826}
1827
1828/**
1829 * Crops the given image to the wanted ratio, then calls media_resize_image to scale it
1830 * to the wanted size
1831 *
1832 * Crops are centered horizontally but prefer the upper third of an vertical
1833 * image because most pics are more interesting in that area (rule of thirds)
1834 *
1835 * @author  Andreas Gohr <andi@splitbrain.org>
1836 */
1837function media_crop_image($file, $ext, $w, $h=0){
1838    global $conf;
1839
1840    if(!$h) $h = $w;
1841    $info = @getimagesize($file); //get original size
1842    if($info == false) return $file; // that's no image - it's a spaceship!
1843
1844    // calculate crop size
1845    $fr = $info[0]/$info[1];
1846    $tr = $w/$h;
1847
1848    // check if the crop can be handled completely by resize,
1849    // i.e. the specified width & height match the aspect ratio of the source image
1850    if ($w == round($h*$fr)) {
1851        return media_resize_image($file, $ext, $w);
1852    }
1853
1854    if($tr >= 1){
1855        if($tr > $fr){
1856            $cw = $info[0];
1857            $ch = (int) ($info[0]/$tr);
1858        }else{
1859            $cw = (int) ($info[1]*$tr);
1860            $ch = $info[1];
1861        }
1862    }else{
1863        if($tr < $fr){
1864            $cw = (int) ($info[1]*$tr);
1865            $ch = $info[1];
1866        }else{
1867            $cw = $info[0];
1868            $ch = (int) ($info[0]/$tr);
1869        }
1870    }
1871    // calculate crop offset
1872    $cx = (int) (($info[0]-$cw)/2);
1873    $cy = (int) (($info[1]-$ch)/3);
1874
1875    //cache
1876    $local = getCacheName($file,'.media.'.$cw.'x'.$ch.'.crop.'.$ext);
1877    $mtime = @filemtime($local); // 0 if not exists
1878
1879    if( $mtime > @filemtime($file) ||
1880            media_crop_imageIM($ext,$file,$info[0],$info[1],$local,$cw,$ch,$cx,$cy) ||
1881            media_resize_imageGD($ext,$file,$cw,$ch,$local,$cw,$ch,$cx,$cy) ){
1882        if($conf['fperm']) @chmod($local, $conf['fperm']);
1883        return media_resize_image($local,$ext, $w, $h);
1884    }
1885
1886    //still here? cropping failed
1887    return media_resize_image($file,$ext, $w, $h);
1888}
1889
1890/**
1891 * Calculate a token to be used to verify fetch requests for resized or
1892 * cropped images have been internally generated - and prevent external
1893 * DDOS attacks via fetch
1894 *
1895 * @author Christopher Smith <chris@jalakai.co.uk>
1896 *
1897 * @param string  $id    id of the image
1898 * @param int     $w     resize/crop width
1899 * @param int     $h     resize/crop height
1900 * @return string
1901 */
1902function media_get_token($id,$w,$h){
1903    // token is only required for modified images
1904    if ($w || $h || media_isexternal($id)) {
1905        $token = $id;
1906        if ($w) $token .= '.'.$w;
1907        if ($h) $token .= '.'.$h;
1908
1909        return substr(PassHash::hmac('md5', $token, auth_cookiesalt()),0,6);
1910    }
1911
1912    return '';
1913}
1914
1915/**
1916 * Download a remote file and return local filename
1917 *
1918 * returns false if download fails. Uses cached file if available and
1919 * wanted
1920 *
1921 * @author  Andreas Gohr <andi@splitbrain.org>
1922 * @author  Pavel Vitis <Pavel.Vitis@seznam.cz>
1923 */
1924function media_get_from_URL($url,$ext,$cache){
1925    global $conf;
1926
1927    // if no cache or fetchsize just redirect
1928    if ($cache==0)           return false;
1929    if (!$conf['fetchsize']) return false;
1930
1931    $local = getCacheName(strtolower($url),".media.$ext");
1932    $mtime = @filemtime($local); // 0 if not exists
1933
1934    //decide if download needed:
1935    if( ($mtime == 0) ||                           // cache does not exist
1936            ($cache != -1 && $mtime < time()-$cache)   // 'recache' and cache has expired
1937      ){
1938        if(media_image_download($url,$local)){
1939            return $local;
1940        }else{
1941            return false;
1942        }
1943    }
1944
1945    //if cache exists use it else
1946    if($mtime) return $local;
1947
1948    //else return false
1949    return false;
1950}
1951
1952/**
1953 * Download image files
1954 *
1955 * @author Andreas Gohr <andi@splitbrain.org>
1956 */
1957function media_image_download($url,$file){
1958    global $conf;
1959    $http = new DokuHTTPClient();
1960    $http->keep_alive = false; // we do single ops here, no need for keep-alive
1961
1962    $http->max_bodysize = $conf['fetchsize'];
1963    $http->timeout = 25; //max. 25 sec
1964    $http->header_regexp = '!\r\nContent-Type: image/(jpe?g|gif|png)!i';
1965
1966    $data = $http->get($url);
1967    if(!$data) return false;
1968
1969    $fileexists = @file_exists($file);
1970    $fp = @fopen($file,"w");
1971    if(!$fp) return false;
1972    fwrite($fp,$data);
1973    fclose($fp);
1974    if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
1975
1976    // check if it is really an image
1977    $info = @getimagesize($file);
1978    if(!$info){
1979        @unlink($file);
1980        return false;
1981    }
1982
1983    return true;
1984}
1985
1986/**
1987 * resize images using external ImageMagick convert program
1988 *
1989 * @author Pavel Vitis <Pavel.Vitis@seznam.cz>
1990 * @author Andreas Gohr <andi@splitbrain.org>
1991 */
1992function media_resize_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h){
1993    global $conf;
1994
1995    // check if convert is configured
1996    if(!$conf['im_convert']) return false;
1997
1998    // prepare command
1999    $cmd  = $conf['im_convert'];
2000    $cmd .= ' -resize '.$to_w.'x'.$to_h.'!';
2001    if ($ext == 'jpg' || $ext == 'jpeg') {
2002        $cmd .= ' -quality '.$conf['jpg_quality'];
2003    }
2004    $cmd .= " $from $to";
2005
2006    @exec($cmd,$out,$retval);
2007    if ($retval == 0) return true;
2008    return false;
2009}
2010
2011/**
2012 * crop images using external ImageMagick convert program
2013 *
2014 * @author Andreas Gohr <andi@splitbrain.org>
2015 */
2016function media_crop_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x,$ofs_y){
2017    global $conf;
2018
2019    // check if convert is configured
2020    if(!$conf['im_convert']) return false;
2021
2022    // prepare command
2023    $cmd  = $conf['im_convert'];
2024    $cmd .= ' -crop '.$to_w.'x'.$to_h.'+'.$ofs_x.'+'.$ofs_y;
2025    if ($ext == 'jpg' || $ext == 'jpeg') {
2026        $cmd .= ' -quality '.$conf['jpg_quality'];
2027    }
2028    $cmd .= " $from $to";
2029
2030    @exec($cmd,$out,$retval);
2031    if ($retval == 0) return true;
2032    return false;
2033}
2034
2035/**
2036 * resize or crop images using PHP's libGD support
2037 *
2038 * @author Andreas Gohr <andi@splitbrain.org>
2039 * @author Sebastian Wienecke <s_wienecke@web.de>
2040 */
2041function media_resize_imageGD($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x=0,$ofs_y=0){
2042    global $conf;
2043
2044    if($conf['gdlib'] < 1) return false; //no GDlib available or wanted
2045
2046    // check available memory
2047    if(!is_mem_available(($from_w * $from_h * 4) + ($to_w * $to_h * 4))){
2048        return false;
2049    }
2050
2051    // create an image of the given filetype
2052    if ($ext == 'jpg' || $ext == 'jpeg'){
2053        if(!function_exists("imagecreatefromjpeg")) return false;
2054        $image = @imagecreatefromjpeg($from);
2055    }elseif($ext == 'png') {
2056        if(!function_exists("imagecreatefrompng")) return false;
2057        $image = @imagecreatefrompng($from);
2058
2059    }elseif($ext == 'gif') {
2060        if(!function_exists("imagecreatefromgif")) return false;
2061        $image = @imagecreatefromgif($from);
2062    }
2063    if(!$image) return false;
2064
2065    if(($conf['gdlib']>1) && function_exists("imagecreatetruecolor") && $ext != 'gif'){
2066        $newimg = @imagecreatetruecolor ($to_w, $to_h);
2067    }
2068    if(!$newimg) $newimg = @imagecreate($to_w, $to_h);
2069    if(!$newimg){
2070        imagedestroy($image);
2071        return false;
2072    }
2073
2074    //keep png alpha channel if possible
2075    if($ext == 'png' && $conf['gdlib']>1 && function_exists('imagesavealpha')){
2076        imagealphablending($newimg, false);
2077        imagesavealpha($newimg,true);
2078    }
2079
2080    //keep gif transparent color if possible
2081    if($ext == 'gif' && function_exists('imagefill') && function_exists('imagecolorallocate')) {
2082        if(function_exists('imagecolorsforindex') && function_exists('imagecolortransparent')) {
2083            $transcolorindex = @imagecolortransparent($image);
2084            if($transcolorindex >= 0 ) { //transparent color exists
2085                $transcolor = @imagecolorsforindex($image, $transcolorindex);
2086                $transcolorindex = @imagecolorallocate($newimg, $transcolor['red'], $transcolor['green'], $transcolor['blue']);
2087                @imagefill($newimg, 0, 0, $transcolorindex);
2088                @imagecolortransparent($newimg, $transcolorindex);
2089            }else{ //filling with white
2090                $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2091                @imagefill($newimg, 0, 0, $whitecolorindex);
2092            }
2093        }else{ //filling with white
2094            $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2095            @imagefill($newimg, 0, 0, $whitecolorindex);
2096        }
2097    }
2098
2099    //try resampling first
2100    if(function_exists("imagecopyresampled")){
2101        if(!@imagecopyresampled($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h)) {
2102            imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2103        }
2104    }else{
2105        imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2106    }
2107
2108    $okay = false;
2109    if ($ext == 'jpg' || $ext == 'jpeg'){
2110        if(!function_exists('imagejpeg')){
2111            $okay = false;
2112        }else{
2113            $okay = imagejpeg($newimg, $to, $conf['jpg_quality']);
2114        }
2115    }elseif($ext == 'png') {
2116        if(!function_exists('imagepng')){
2117            $okay = false;
2118        }else{
2119            $okay =  imagepng($newimg, $to);
2120        }
2121    }elseif($ext == 'gif') {
2122        if(!function_exists('imagegif')){
2123            $okay = false;
2124        }else{
2125            $okay = imagegif($newimg, $to);
2126        }
2127    }
2128
2129    // destroy GD image ressources
2130    if($image) imagedestroy($image);
2131    if($newimg) imagedestroy($newimg);
2132
2133    return $okay;
2134}
2135
2136/**
2137 * Return other media files with the same base name
2138 * but different extensions.
2139 *
2140 * @param string $src       - ID of media file
2141 * @param array $exts       - alternative extensions to find other files for
2142 * @return array            - mime type => file ID
2143 *
2144 * @author Anika Henke <anika@selfthinker.org>
2145 */
2146function media_alternativefiles($src, $exts){
2147
2148    $files = array();
2149    list($srcExt, $srcMime) = mimetype($src);
2150    $filebase = substr($src, 0, -1 * (strlen($srcExt)+1));
2151
2152    foreach($exts as $ext) {
2153        $fileid = $filebase.'.'.$ext;
2154        $file = mediaFN($fileid);
2155        if(file_exists($file)) {
2156            list($fileExt, $fileMime) = mimetype($file);
2157            $files[$fileMime] = $fileid;
2158        }
2159    }
2160    return $files;
2161}
2162
2163/**
2164 * Check if video/audio is supported to be embedded.
2165 *
2166 * @param string $mime      - mimetype of media file
2167 * @param string $type      - type of media files to check ('video', 'audio', or none)
2168 * @return boolean
2169 *
2170 * @author Anika Henke <anika@selfthinker.org>
2171 */
2172function media_supportedav($mime, $type=NULL){
2173    $supportedAudio = array(
2174        'ogg' => 'audio/ogg',
2175        'mp3' => 'audio/mpeg',
2176        'wav' => 'audio/wav',
2177    );
2178    $supportedVideo = array(
2179        'webm' => 'video/webm',
2180        'ogv' => 'video/ogg',
2181        'mp4' => 'video/mp4',
2182    );
2183    if ($type == 'audio') {
2184        $supportedAv = $supportedAudio;
2185    } elseif ($type == 'video') {
2186        $supportedAv = $supportedVideo;
2187    } else {
2188        $supportedAv = array_merge($supportedAudio, $supportedVideo);
2189    }
2190    return in_array($mime, $supportedAv);
2191}
2192
2193/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
2194