xref: /dokuwiki/inc/media.php (revision d637819dca760b20f6e53e5847a92d08d8d15b8c) 
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, $config_cascade;
119
120    if($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    $form->printForm();
170}
171
172/**
173 * Convenience function to check if a media file is still in use
174 *
175 * @author Michael Klier <chi@chimeric.de>
176 */
177function media_inuse($id) {
178    global $conf;
179    $mediareferences = array();
180    if($conf['refcheck']){
181        $mediareferences = ft_mediause($id,true);
182        if(!count($mediareferences)) {
183            return false;
184        } else {
185            return $mediareferences;
186        }
187    } else {
188        return false;
189    }
190}
191
192define('DOKU_MEDIA_DELETED', 1);
193define('DOKU_MEDIA_NOT_AUTH', 2);
194define('DOKU_MEDIA_INUSE', 4);
195define('DOKU_MEDIA_EMPTY_NS', 8);
196
197/**
198 * Handles media file deletions
199 *
200 * If configured, checks for media references before deletion
201 *
202 * @author Andreas Gohr <andi@splitbrain.org>
203 * @return int One of: 0,
204 *                     DOKU_MEDIA_DELETED,
205 *                     DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS,
206 *                     DOKU_MEDIA_NOT_AUTH,
207 *                     DOKU_MEDIA_INUSE
208 */
209function media_delete($id,$auth){
210    global $lang;
211    if($auth < AUTH_DELETE) return DOKU_MEDIA_NOT_AUTH;
212    if(media_inuse($id)) return DOKU_MEDIA_INUSE;
213
214    $file = mediaFN($id);
215
216    // trigger an event - MEDIA_DELETE_FILE
217    $data['id']   = $id;
218    $data['name'] = utf8_basename($file);
219    $data['path'] = $file;
220    $data['size'] = (@file_exists($file)) ? filesize($file) : 0;
221
222    $data['unl'] = false;
223    $data['del'] = false;
224    $evt = new Doku_Event('MEDIA_DELETE_FILE',$data);
225    if ($evt->advise_before()) {
226        $old = @filemtime($file);
227        if(!@file_exists(mediaFN($id, $old)) && @file_exists($file)) {
228            // add old revision to the attic
229            media_saveOldRevision($id);
230        }
231
232        $data['unl'] = @unlink($file);
233        if($data['unl']){
234            addMediaLogEntry(time(), $id, DOKU_CHANGE_TYPE_DELETE, $lang['deleted']);
235            $data['del'] = io_sweepNS($id,'mediadir');
236        }
237    }
238    $evt->advise_after();
239    unset($evt);
240
241    if($data['unl'] && $data['del']){
242        return DOKU_MEDIA_DELETED | DOKU_MEDIA_EMPTY_NS;
243    }
244
245    return $data['unl'] ? DOKU_MEDIA_DELETED : 0;
246}
247
248/**
249 * Handle file uploads via XMLHttpRequest
250 *
251 * @return mixed false on error, id of the new file on success
252 */
253function media_upload_xhr($ns,$auth){
254    if(!checkSecurityToken()) return false;
255    global $INPUT;
256
257    $id = $INPUT->get->str('qqfile');
258    list($ext,$mime,$dl) = mimetype($id);
259    $input = fopen("php://input", "r");
260    if (!($tmp = io_mktmpdir())) return false;
261    $path = $tmp.'/'.md5($id);
262    $target = fopen($path, "w");
263    $realSize = stream_copy_to_stream($input, $target);
264    fclose($target);
265    fclose($input);
266    if (isset($_SERVER["CONTENT_LENGTH"]) && ($realSize != (int)$_SERVER["CONTENT_LENGTH"])){
267        unlink($path);
268        return false;
269    }
270
271    $res = media_save(
272        array('name' => $path,
273            'mime' => $mime,
274            'ext'  => $ext),
275        $ns.':'.$id,
276        (($INPUT->get->str('ow') == 'checked') ? true : false),
277        $auth,
278        'copy'
279    );
280    unlink($path);
281    if ($tmp) dir_delete($tmp);
282    if (is_array($res)) {
283        msg($res[0], $res[1]);
284        return false;
285    }
286    return $res;
287}
288
289/**
290 * Handles media file uploads
291 *
292 * @author Andreas Gohr <andi@splitbrain.org>
293 * @author Michael Klier <chi@chimeric.de>
294 * @return mixed false on error, id of the new file on success
295 */
296function media_upload($ns,$auth,$file=false){
297    if(!checkSecurityToken()) return false;
298    global $lang;
299    global $INPUT;
300
301    // get file and id
302    $id   = $INPUT->post->str('mediaid');
303    if (!$file) $file = $_FILES['upload'];
304    if(empty($id)) $id = $file['name'];
305
306    // check for errors (messages are done in lib/exe/mediamanager.php)
307    if($file['error']) return false;
308
309    // check extensions
310    list($fext,$fmime,$dl) = mimetype($file['name']);
311    list($iext,$imime,$dl) = mimetype($id);
312    if($fext && !$iext){
313        // no extension specified in id - read original one
314        $id   .= '.'.$fext;
315        $imime = $fmime;
316    }elseif($fext && $fext != $iext){
317        // extension was changed, print warning
318        msg(sprintf($lang['mediaextchange'],$fext,$iext));
319    }
320
321    $res = media_save(array('name' => $file['tmp_name'],
322                            'mime' => $imime,
323                            'ext'  => $iext), $ns.':'.$id,
324                      $INPUT->post->bool('ow'), $auth, 'copy_uploaded_file');
325    if (is_array($res)) {
326        msg($res[0], $res[1]);
327        return false;
328    }
329    return $res;
330}
331
332/**
333 * An alternative to move_uploaded_file that copies
334 *
335 * Using copy, makes sure any setgid bits on the media directory are honored
336 *
337 * @see   move_uploaded_file()
338 * @param string $from
339 * @param string $to
340 * @return bool
341 */
342function copy_uploaded_file($from, $to){
343    if(!is_uploaded_file($from)) return false;
344    $ok = copy($from, $to);
345    @unlink($from);
346    return $ok;
347}
348
349/**
350 * This generates an action event and delegates to _media_upload_action().
351 * Action plugins are allowed to pre/postprocess the uploaded file.
352 * (The triggered event is preventable.)
353 *
354 * Event data:
355 * $data[0]     fn_tmp: the temporary file name (read from $_FILES)
356 * $data[1]     fn: the file name of the uploaded file
357 * $data[2]     id: the future directory id of the uploaded file
358 * $data[3]     imime: the mimetype of the uploaded file
359 * $data[4]     overwrite: if an existing file is going to be overwritten
360 *
361 * @triggers MEDIA_UPLOAD_FINISH
362 */
363function media_save($file, $id, $ow, $auth, $move) {
364    if($auth < AUTH_UPLOAD) {
365        return array("You don't have permissions to upload files.", -1);
366    }
367
368    if (!isset($file['mime']) || !isset($file['ext'])) {
369        list($ext, $mime) = mimetype($id);
370        if (!isset($file['mime'])) {
371            $file['mime'] = $mime;
372        }
373        if (!isset($file['ext'])) {
374            $file['ext'] = $ext;
375        }
376    }
377
378    global $lang, $conf;
379
380    // get filename
381    $id   = cleanID($id);
382    $fn   = mediaFN($id);
383
384    // get filetype regexp
385    $types = array_keys(getMimeTypes());
386    $types = array_map(create_function('$q','return preg_quote($q,"/");'),$types);
387    $regex = join('|',$types);
388
389    // because a temp file was created already
390    if(!preg_match('/\.('.$regex.')$/i',$fn)) {
391        return array($lang['uploadwrong'],-1);
392    }
393
394    //check for overwrite
395    $overwrite = @file_exists($fn);
396    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
397    if($overwrite && (!$ow || $auth < $auth_ow)) {
398        return array($lang['uploadexist'], 0);
399    }
400    // check for valid content
401    $ok = media_contentcheck($file['name'], $file['mime']);
402    if($ok == -1){
403        return array(sprintf($lang['uploadbadcontent'],'.' . $file['ext']),-1);
404    }elseif($ok == -2){
405        return array($lang['uploadspam'],-1);
406    }elseif($ok == -3){
407        return array($lang['uploadxss'],-1);
408    }
409
410    // prepare event data
411    $data[0] = $file['name'];
412    $data[1] = $fn;
413    $data[2] = $id;
414    $data[3] = $file['mime'];
415    $data[4] = $overwrite;
416    $data[5] = $move;
417
418    // trigger event
419    return trigger_event('MEDIA_UPLOAD_FINISH', $data, '_media_upload_action', true);
420}
421
422/**
423 * Callback adapter for media_upload_finish()
424 * @author Michael Klier <chi@chimeric.de>
425 */
426function _media_upload_action($data) {
427    // fixme do further sanity tests of given data?
428    if(is_array($data) && count($data)===6) {
429        return media_upload_finish($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
430    } else {
431        return false; //callback error
432    }
433}
434
435/**
436 * Saves an uploaded media file
437 *
438 * @author Andreas Gohr <andi@splitbrain.org>
439 * @author Michael Klier <chi@chimeric.de>
440 * @author Kate Arzamastseva <pshns@ukr.net>
441 */
442function media_upload_finish($fn_tmp, $fn, $id, $imime, $overwrite, $move = 'move_uploaded_file') {
443    global $conf;
444    global $lang;
445    global $REV;
446
447    $old = @filemtime($fn);
448    if(!@file_exists(mediaFN($id, $old)) && @file_exists($fn)) {
449        // add old revision to the attic if missing
450        media_saveOldRevision($id);
451    }
452
453    // prepare directory
454    io_createNamespace($id, 'media');
455
456    if($move($fn_tmp, $fn)) {
457        @clearstatcache(true,$fn);
458        $new = @filemtime($fn);
459        // Set the correct permission here.
460        // Always chmod media because they may be saved with different permissions than expected from the php umask.
461        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
462        chmod($fn, $conf['fmode']);
463        msg($lang['uploadsucc'],1);
464        media_notify($id,$fn,$imime,$old);
465        // add a log entry to the media changelog
466        if ($REV){
467            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_REVERT, sprintf($lang['restored'], dformat($REV)), $REV);
468        } elseif ($overwrite) {
469            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_EDIT);
470        } else {
471            addMediaLogEntry($new, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created']);
472        }
473        return $id;
474    }else{
475        return array($lang['uploadfail'],-1);
476    }
477}
478
479/**
480 * Moves the current version of media file to the media_attic
481 * directory
482 *
483 * @author Kate Arzamastseva <pshns@ukr.net>
484 * @param string $id
485 * @return int - revision date
486 */
487function media_saveOldRevision($id){
488    global $conf, $lang;
489
490    $oldf = mediaFN($id);
491    if(!@file_exists($oldf)) return '';
492    $date = filemtime($oldf);
493    if (!$conf['mediarevisions']) return $date;
494
495    if (!getRevisionInfo($id, $date, 8192, true)) {
496        // there was an external edit,
497        // there is no log entry for current version of file
498        if (!@file_exists(mediaMetaFN($id,'.changes'))) {
499            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_CREATE, $lang['created']);
500        } else {
501            addMediaLogEntry($date, $id, DOKU_CHANGE_TYPE_EDIT);
502        }
503    }
504
505    $newf = mediaFN($id,$date);
506    io_makeFileDir($newf);
507    if(copy($oldf, $newf)) {
508        // Set the correct permission here.
509        // Always chmod media because they may be saved with different permissions than expected from the php umask.
510        // (Should normally chmod to $conf['fperm'] only if $conf['fperm'] is set.)
511        chmod($newf, $conf['fmode']);
512    }
513    return $date;
514}
515
516/**
517 * This function checks if the uploaded content is really what the
518 * mimetype says it is. We also do spam checking for text types here.
519 *
520 * We need to do this stuff because we can not rely on the browser
521 * to do this check correctly. Yes, IE is broken as usual.
522 *
523 * @author Andreas Gohr <andi@splitbrain.org>
524 * @link   http://www.splitbrain.org/blog/2007-02/12-internet_explorer_facilitates_cross_site_scripting
525 * @fixme  check all 26 magic IE filetypes here?
526 */
527function media_contentcheck($file,$mime){
528    global $conf;
529    if($conf['iexssprotect']){
530        $fh = @fopen($file, 'rb');
531        if($fh){
532            $bytes = fread($fh, 256);
533            fclose($fh);
534            if(preg_match('/<(script|a|img|html|body|iframe)[\s>]/i',$bytes)){
535                return -3;
536            }
537        }
538    }
539    if(substr($mime,0,6) == 'image/'){
540        $info = @getimagesize($file);
541        if($mime == 'image/gif' && $info[2] != 1){
542            return -1;
543        }elseif($mime == 'image/jpeg' && $info[2] != 2){
544            return -1;
545        }elseif($mime == 'image/png' && $info[2] != 3){
546            return -1;
547        }
548        # fixme maybe check other images types as well
549    }elseif(substr($mime,0,5) == 'text/'){
550        global $TEXT;
551        $TEXT = io_readFile($file);
552        if(checkwordblock()){
553            return -2;
554        }
555    }
556    return 0;
557}
558
559/**
560 * Send a notify mail on uploads
561 *
562 * @author Andreas Gohr <andi@splitbrain.org>
563 */
564function media_notify($id,$file,$mime,$old_rev=false){
565    global $conf;
566    if(empty($conf['notify'])) return; //notify enabled?
567
568    $subscription = new Subscription();
569    return $subscription->send_media_diff($conf['notify'], 'uploadmail', $id, $old_rev, '');
570}
571
572/**
573 * List all files in a given Media namespace
574 */
575function media_filelist($ns,$auth=null,$jump='',$fullscreenview=false,$sort=false){
576    global $conf;
577    global $lang;
578    $ns = cleanID($ns);
579
580    // check auth our self if not given (needed for ajax calls)
581    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
582
583    if (!$fullscreenview) echo '<h1 id="media__ns">:'.hsc($ns).'</h1>'.NL;
584
585    if($auth < AUTH_READ){
586        // FIXME: print permission warning here instead?
587        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
588    }else{
589        if (!$fullscreenview) media_uploadform($ns, $auth);
590
591        $dir = utf8_encodeFN(str_replace(':','/',$ns));
592        $data = array();
593        search($data,$conf['mediadir'],'search_media',
594                array('showmsg'=>true,'depth'=>1),$dir,1,$sort);
595
596        if(!count($data)){
597            echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
598        }else {
599            if ($fullscreenview) {
600                echo '<ul class="' . _media_get_list_type() . '">';
601            }
602            foreach($data as $item){
603                if (!$fullscreenview) {
604                    media_printfile($item,$auth,$jump);
605                } else {
606                    media_printfile_thumbs($item,$auth,$jump);
607                }
608            }
609            if ($fullscreenview) echo '</ul>'.NL;
610        }
611    }
612    if (!$fullscreenview) media_searchform($ns);
613}
614
615/**
616 * Prints tabs for files list actions
617 *
618 * @author Kate Arzamastseva <pshns@ukr.net>
619 * @author Adrian Lang <mail@adrianlang.de>
620 *
621 * @param string $selected_tab - opened tab
622 */
623
624function media_tabs_files($selected_tab = ''){
625    global $lang;
626    $tabs = array();
627    foreach(array('files'  => 'mediaselect',
628                  'upload' => 'media_uploadtab',
629                  'search' => 'media_searchtab') as $tab => $caption) {
630        $tabs[$tab] = array('href'    => media_managerURL(array('tab_files' => $tab), '&'),
631                            'caption' => $lang[$caption]);
632    }
633
634    html_tabs($tabs, $selected_tab);
635}
636
637/**
638 * Prints tabs for files details actions
639 *
640 * @author Kate Arzamastseva <pshns@ukr.net>
641 * @param string $selected_tab - opened tab
642 */
643function media_tabs_details($image, $selected_tab = ''){
644    global $lang, $conf;
645
646    $tabs = array();
647    $tabs['view'] = array('href'    => media_managerURL(array('tab_details' => 'view'), '&'),
648                          'caption' => $lang['media_viewtab']);
649
650    list($ext, $mime) = mimetype($image);
651    if ($mime == 'image/jpeg' && @file_exists(mediaFN($image))) {
652        $tabs['edit'] = array('href'    => media_managerURL(array('tab_details' => 'edit'), '&'),
653                              'caption' => $lang['media_edittab']);
654    }
655    if ($conf['mediarevisions']) {
656        $tabs['history'] = array('href'    => media_managerURL(array('tab_details' => 'history'), '&'),
657                                 'caption' => $lang['media_historytab']);
658    }
659
660    html_tabs($tabs, $selected_tab);
661}
662
663/**
664 * Prints options for the tab that displays a list of all files
665 *
666 * @author Kate Arzamastseva <pshns@ukr.net>
667 */
668function media_tab_files_options(){
669    global $lang;
670    global $NS;
671    global $INPUT;
672    global $ID;
673    $form = new Doku_Form(array('class' => 'options', 'method' => 'get',
674                                'action' => wl($ID)));
675    $media_manager_params = media_managerURL(array(), '', false, true);
676    foreach($media_manager_params as $pKey => $pVal){
677        $form->addHidden($pKey, $pVal);
678    }
679    $form->addHidden('sectok', null);
680    if ($INPUT->has('q')) {
681        $form->addHidden('q', $INPUT->str('q'));
682    }
683    $form->addElement('<ul>'.NL);
684    foreach(array('list' => array('listType', array('thumbs', 'rows')),
685                  'sort' => array('sortBy', array('name', 'date')))
686            as $group => $content) {
687        $checked = "_media_get_${group}_type";
688        $checked = $checked();
689
690        $form->addElement('<li class="' . $content[0] . '">');
691        foreach($content[1] as $option) {
692            $attrs = array();
693            if ($checked == $option) {
694                $attrs['checked'] = 'checked';
695            }
696            $form->addElement(form_makeRadioField($group, $option,
697                                       $lang['media_' . $group . '_' . $option],
698                                                  $content[0] . '__' . $option,
699                                                  $option, $attrs));
700        }
701        $form->addElement('</li>'.NL);
702    }
703    $form->addElement('<li>');
704    $form->addElement(form_makeButton('submit', '', $lang['btn_apply']));
705    $form->addElement('</li>'.NL);
706    $form->addElement('</ul>'.NL);
707    $form->printForm();
708}
709
710/**
711 * Returns type of sorting for the list of files in media manager
712 *
713 * @author Kate Arzamastseva <pshns@ukr.net>
714 * @return string - sort type
715 */
716function _media_get_sort_type() {
717    return _media_get_display_param('sort', array('default' => 'name', 'date'));
718}
719
720function _media_get_list_type() {
721    return _media_get_display_param('list', array('default' => 'thumbs', 'rows'));
722}
723
724function _media_get_display_param($param, $values) {
725    global $INPUT;
726    if (in_array($INPUT->str($param), $values)) {
727        // FIXME: Set cookie
728        return $INPUT->str($param);
729    } else {
730        $val = get_doku_pref($param, $values['default']);
731        if (!in_array($val, $values)) {
732            $val = $values['default'];
733        }
734        return $val;
735    }
736}
737
738/**
739 * Prints tab that displays a list of all files
740 *
741 * @author Kate Arzamastseva <pshns@ukr.net>
742 */
743function media_tab_files($ns,$auth=null,$jump='') {
744    global $lang;
745    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
746
747    if($auth < AUTH_READ){
748        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
749    }else{
750        media_filelist($ns,$auth,$jump,true,_media_get_sort_type());
751    }
752}
753
754/**
755 * Prints tab that displays uploading form
756 *
757 * @author Kate Arzamastseva <pshns@ukr.net>
758 */
759function media_tab_upload($ns,$auth=null,$jump='') {
760    global $lang;
761    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
762
763    echo '<div class="upload">'.NL;
764    if ($auth >= AUTH_UPLOAD) {
765        echo '<p>' . $lang['mediaupload'] . '</p>';
766    }
767    media_uploadform($ns, $auth, true);
768    echo '</div>'.NL;
769}
770
771/**
772 * Prints tab that displays search form
773 *
774 * @author Kate Arzamastseva <pshns@ukr.net>
775 */
776function media_tab_search($ns,$auth=null) {
777    global $lang;
778    global $INPUT;
779
780    $do = $INPUT->str('mediado');
781    $query = $INPUT->str('q');
782    echo '<div class="search">'.NL;
783
784    media_searchform($ns, $query, true);
785    if ($do == 'searchlist' || $query) {
786        media_searchlist($query,$ns,$auth,true,_media_get_sort_type());
787    }
788    echo '</div>'.NL;
789}
790
791/**
792 * Prints tab that displays mediafile details
793 *
794 * @author Kate Arzamastseva <pshns@ukr.net>
795 */
796function media_tab_view($image, $ns, $auth=null, $rev=false) {
797    global $lang, $conf;
798    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
799
800    if ($image && $auth >= AUTH_READ) {
801        $meta = new JpegMeta(mediaFN($image, $rev));
802        media_preview($image, $auth, $rev, $meta);
803        media_preview_buttons($image, $auth, $rev);
804        media_details($image, $auth, $rev, $meta);
805
806    } else {
807        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
808    }
809}
810
811/**
812 * Prints tab that displays form for editing mediafile metadata
813 *
814 * @author Kate Arzamastseva <pshns@ukr.net>
815 */
816function media_tab_edit($image, $ns, $auth=null) {
817    global $lang;
818    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
819
820    if ($image) {
821        list($ext, $mime) = mimetype($image);
822        if ($mime == 'image/jpeg') media_metaform($image,$auth);
823    }
824}
825
826/**
827 * Prints tab that displays mediafile revisions
828 *
829 * @author Kate Arzamastseva <pshns@ukr.net>
830 */
831function media_tab_history($image, $ns, $auth=null) {
832    global $lang;
833    global $INPUT;
834
835    if(is_null($auth)) $auth = auth_quickaclcheck("$ns:*");
836    $do = $INPUT->str('mediado');
837
838    if ($auth >= AUTH_READ && $image) {
839        if ($do == 'diff'){
840            media_diff($image, $ns, $auth);
841        } else {
842            $first = $INPUT->int('first');
843            html_revisions($first, $image);
844        }
845    } else {
846        echo '<div class="nothing">'.$lang['media_perm_read'].'</div>'.NL;
847    }
848}
849
850/**
851 * Prints mediafile details
852 *
853 * @author Kate Arzamastseva <pshns@ukr.net>
854 */
855function media_preview($image, $auth, $rev=false, $meta=false) {
856
857    $size = media_image_preview_size($image, $rev, $meta);
858
859    if ($size) {
860        global $lang;
861        echo '<div class="image">';
862
863        $more = array();
864        if ($rev) {
865            $more['rev'] = $rev;
866        } else {
867            $t = @filemtime(mediaFN($image));
868            $more['t'] = $t;
869        }
870
871        $more['w'] = $size[0];
872        $more['h'] = $size[1];
873        $src = ml($image, $more);
874
875        echo '<a href="'.$src.'" target="_blank" title="'.$lang['mediaview'].'">';
876        echo '<img src="'.$src.'" alt="" style="max-width: '.$size[0].'px;" />';
877        echo '</a>';
878
879        echo '</div>'.NL;
880    }
881}
882
883/**
884 * Prints mediafile action buttons
885 *
886 * @author Kate Arzamastseva <pshns@ukr.net>
887 */
888function media_preview_buttons($image, $auth, $rev=false) {
889    global $lang, $conf;
890
891    echo '<ul class="actions">'.NL;
892
893    if($auth >= AUTH_DELETE && !$rev && @file_exists(mediaFN($image))){
894
895        // delete button
896        $form = new Doku_Form(array('id' => 'mediamanager__btn_delete',
897            'action'=>media_managerURL(array('delete' => $image), '&')));
898        $form->addElement(form_makeButton('submit','',$lang['btn_delete']));
899        echo '<li>';
900        $form->printForm();
901        echo '</li>'.NL;
902    }
903
904    $auth_ow = (($conf['mediarevisions']) ? AUTH_UPLOAD : AUTH_DELETE);
905    if($auth >= $auth_ow && !$rev){
906
907        // upload new version button
908        $form = new Doku_Form(array('id' => 'mediamanager__btn_update',
909            'action'=>media_managerURL(array('image' => $image, 'mediado' => 'update'), '&')));
910        $form->addElement(form_makeButton('submit','',$lang['media_update']));
911        echo '<li>';
912        $form->printForm();
913        echo '</li>'.NL;
914    }
915
916    if($auth >= AUTH_UPLOAD && $rev && $conf['mediarevisions'] && @file_exists(mediaFN($image, $rev))){
917
918        // restore button
919        $form = new Doku_Form(array('id' => 'mediamanager__btn_restore',
920            'action'=>media_managerURL(array('image' => $image), '&')));
921        $form->addHidden('mediado','restore');
922        $form->addHidden('rev',$rev);
923        $form->addElement(form_makeButton('submit','',$lang['media_restore']));
924        echo '<li>';
925        $form->printForm();
926        echo '</li>'.NL;
927    }
928
929    echo '</ul>'.NL;
930}
931
932/**
933 * Returns image width and height for mediamanager preview panel
934 *
935 * @author Kate Arzamastseva <pshns@ukr.net>
936 * @param string $image
937 * @param int $rev
938 * @param JpegMeta $meta
939 * @return array
940 */
941function media_image_preview_size($image, $rev, $meta, $size = 500) {
942    if (!preg_match("/\.(jpe?g|gif|png)$/", $image) || !file_exists(mediaFN($image, $rev))) return false;
943
944    $info = getimagesize(mediaFN($image, $rev));
945    $w = (int) $info[0];
946    $h = (int) $info[1];
947
948    if($meta && ($w > $size || $h > $size)){
949        $ratio = $meta->getResizeRatio($size, $size);
950        $w = floor($w * $ratio);
951        $h = floor($h * $ratio);
952    }
953    return array($w, $h);
954}
955
956/**
957 * Returns the requested EXIF/IPTC tag from the image meta
958 *
959 * @author Kate Arzamastseva <pshns@ukr.net>
960 * @param array $tags
961 * @param JpegMeta $meta
962 * @param string $alt
963 * @return string
964 */
965function media_getTag($tags,$meta,$alt=''){
966    if($meta === false) return $alt;
967    $info = $meta->getField($tags);
968    if($info == false) return $alt;
969    return $info;
970}
971
972/**
973 * Returns mediafile tags
974 *
975 * @author Kate Arzamastseva <pshns@ukr.net>
976 * @param JpegMeta $meta
977 * @return array
978 */
979function media_file_tags($meta) {
980    global $config_cascade;
981
982    // load the field descriptions
983    static $fields = null;
984    if(is_null($fields)){
985        $config_files = getConfigFiles('mediameta');
986        foreach ($config_files as $config_file) {
987            if(@file_exists($config_file)) include($config_file);
988        }
989    }
990
991    $tags = array();
992
993    foreach($fields as $key => $tag){
994        $t = array();
995        if (!empty($tag[0])) $t = array($tag[0]);
996        if(is_array($tag[3])) $t = array_merge($t,$tag[3]);
997        $value = media_getTag($t, $meta);
998        $tags[] = array('tag' => $tag, 'value' => $value);
999    }
1000
1001    return $tags;
1002}
1003
1004/**
1005 * Prints mediafile tags
1006 *
1007 * @author Kate Arzamastseva <pshns@ukr.net>
1008 */
1009function media_details($image, $auth, $rev=false, $meta=false) {
1010    global $lang;
1011
1012    if (!$meta) $meta = new JpegMeta(mediaFN($image, $rev));
1013    $tags = media_file_tags($meta);
1014
1015    echo '<dl>'.NL;
1016    foreach($tags as $tag){
1017        if ($tag['value']) {
1018            $value = cleanText($tag['value']);
1019            echo '<dt>'.$lang[$tag['tag'][1]].':</dt><dd>';
1020            if ($tag['tag'][2] == 'date') echo dformat($value);
1021            else echo hsc($value);
1022            echo '</dd>'.NL;
1023        }
1024    }
1025    echo '</dl>'.NL;
1026}
1027
1028/**
1029 * Shows difference between two revisions of file
1030 *
1031 * @author Kate Arzamastseva <pshns@ukr.net>
1032 */
1033function media_diff($image, $ns, $auth, $fromajax = false) {
1034    global $lang;
1035    global $conf;
1036    global $INPUT;
1037
1038    if ($auth < AUTH_READ || !$image || !$conf['mediarevisions']) return '';
1039
1040    $rev1 = $INPUT->int('rev');
1041
1042    $rev2 = $INPUT->ref('rev2');
1043    if(is_array($rev2)){
1044        $rev1 = (int) $rev2[0];
1045        $rev2 = (int) $rev2[1];
1046
1047        if(!$rev1){
1048            $rev1 = $rev2;
1049            unset($rev2);
1050        }
1051    }else{
1052        $rev2 = $INPUT->int('rev2');
1053    }
1054
1055    if ($rev1 && !file_exists(mediaFN($image, $rev1))) $rev1 = false;
1056    if ($rev2 && !file_exists(mediaFN($image, $rev2))) $rev2 = false;
1057
1058    if($rev1 && $rev2){            // two specific revisions wanted
1059        // make sure order is correct (older on the left)
1060        if($rev1 < $rev2){
1061            $l_rev = $rev1;
1062            $r_rev = $rev2;
1063        }else{
1064            $l_rev = $rev2;
1065            $r_rev = $rev1;
1066        }
1067    }elseif($rev1){                // single revision given, compare to current
1068        $r_rev = '';
1069        $l_rev = $rev1;
1070    }else{                        // no revision was given, compare previous to current
1071        $r_rev = '';
1072        $revs = getRevisions($image, 0, 1, 8192, true);
1073        if (file_exists(mediaFN($image, $revs[0]))) {
1074            $l_rev = $revs[0];
1075        } else {
1076            $l_rev = '';
1077        }
1078    }
1079
1080    // prepare event data
1081    $data[0] = $image;
1082    $data[1] = $l_rev;
1083    $data[2] = $r_rev;
1084    $data[3] = $ns;
1085    $data[4] = $auth;
1086    $data[5] = $fromajax;
1087
1088    // trigger event
1089    return trigger_event('MEDIA_DIFF', $data, '_media_file_diff', true);
1090
1091}
1092
1093function _media_file_diff($data) {
1094    if(is_array($data) && count($data)===6) {
1095        return media_file_diff($data[0], $data[1], $data[2], $data[3], $data[4], $data[5]);
1096    } else {
1097        return false;
1098    }
1099}
1100
1101/**
1102 * Shows difference between two revisions of image
1103 *
1104 * @author Kate Arzamastseva <pshns@ukr.net>
1105 */
1106function media_file_diff($image, $l_rev, $r_rev, $ns, $auth, $fromajax){
1107    global $lang;
1108    global $config_cascade;
1109    global $INPUT;
1110
1111    $l_meta = new JpegMeta(mediaFN($image, $l_rev));
1112    $r_meta = new JpegMeta(mediaFN($image, $r_rev));
1113
1114    $is_img = preg_match("/\.(jpe?g|gif|png)$/", $image);
1115    if ($is_img) {
1116        $l_size = media_image_preview_size($image, $l_rev, $l_meta);
1117        $r_size = media_image_preview_size($image, $r_rev, $r_meta);
1118        $is_img = ($l_size && $r_size && ($l_size[0] >= 30 || $r_size[0] >= 30));
1119
1120        $difftype = $INPUT->str('difftype');
1121
1122        if (!$fromajax) {
1123            $form = new Doku_Form(array(
1124                'action' => media_managerURL(array(), '&'),
1125                'method' => 'get',
1126                'id' => 'mediamanager__form_diffview',
1127                'class' => 'diffView'
1128            ));
1129            $form->addHidden('sectok', null);
1130            $form->addElement('<input type="hidden" name="rev2[]" value="'.$l_rev.'" ></input>');
1131            $form->addElement('<input type="hidden" name="rev2[]" value="'.$r_rev.'" ></input>');
1132            $form->addHidden('mediado', 'diff');
1133            $form->printForm();
1134
1135            echo NL.'<div id="mediamanager__diff" >'.NL;
1136        }
1137
1138        if ($difftype == 'opacity' || $difftype == 'portions') {
1139            media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $difftype);
1140            if (!$fromajax) echo '</div>';
1141            return '';
1142        }
1143    }
1144
1145    list($l_head, $r_head) = html_diff_head($l_rev, $r_rev, $image, true);
1146
1147    ?>
1148    <div class="table">
1149    <table>
1150      <tr>
1151        <th><?php echo $l_head; ?></th>
1152        <th><?php echo $r_head; ?></th>
1153      </tr>
1154    <?php
1155
1156    echo '<tr class="image">';
1157    echo '<td>';
1158    media_preview($image, $auth, $l_rev, $l_meta);
1159    echo '</td>';
1160
1161    echo '<td>';
1162    media_preview($image, $auth, $r_rev, $r_meta);
1163    echo '</td>';
1164    echo '</tr>'.NL;
1165
1166    echo '<tr class="actions">';
1167    echo '<td>';
1168    media_preview_buttons($image, $auth, $l_rev);
1169    echo '</td>';
1170
1171    echo '<td>';
1172    media_preview_buttons($image, $auth, $r_rev);
1173    echo '</td>';
1174    echo '</tr>'.NL;
1175
1176    $l_tags = media_file_tags($l_meta);
1177    $r_tags = media_file_tags($r_meta);
1178    // FIXME r_tags-only stuff
1179    foreach ($l_tags as $key => $l_tag) {
1180        if ($l_tag['value'] != $r_tags[$key]['value']) {
1181            $r_tags[$key]['highlighted'] = true;
1182            $l_tags[$key]['highlighted'] = true;
1183        } else if (!$l_tag['value'] || !$r_tags[$key]['value']) {
1184            unset($r_tags[$key]);
1185            unset($l_tags[$key]);
1186        }
1187    }
1188
1189    echo '<tr>';
1190    foreach(array($l_tags,$r_tags) as $tags){
1191        echo '<td>'.NL;
1192
1193        echo '<dl class="img_tags">';
1194        foreach($tags as $tag){
1195            $value = cleanText($tag['value']);
1196            if (!$value) $value = '-';
1197            echo '<dt>'.$lang[$tag['tag'][1]].':</dt>';
1198            echo '<dd>';
1199            if ($tag['highlighted']) {
1200                echo '<strong>';
1201            }
1202            if ($tag['tag'][2] == 'date') echo dformat($value);
1203            else echo hsc($value);
1204            if ($tag['highlighted']) {
1205                echo '</strong>';
1206            }
1207            echo '</dd>';
1208        }
1209        echo '</dl>'.NL;
1210
1211        echo '</td>';
1212    }
1213    echo '</tr>'.NL;
1214
1215    echo '</table>'.NL;
1216    echo '</div>'.NL;
1217
1218    if ($is_img && !$fromajax) echo '</div>';
1219}
1220
1221/**
1222 * Prints two images side by side
1223 * and slider
1224 *
1225 * @author Kate Arzamastseva <pshns@ukr.net>
1226 * @param string $image
1227 * @param int $l_rev
1228 * @param int $r_rev
1229 * @param array $l_size
1230 * @param array $r_size
1231 * @param string $type
1232 */
1233function media_image_diff($image, $l_rev, $r_rev, $l_size, $r_size, $type) {
1234    if ($l_size != $r_size) {
1235        if ($r_size[0] > $l_size[0]) {
1236            $l_size = $r_size;
1237        }
1238    }
1239
1240    $l_more = array('rev' => $l_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1241    $r_more = array('rev' => $r_rev, 'h' => $l_size[1], 'w' => $l_size[0]);
1242
1243    $l_src = ml($image, $l_more);
1244    $r_src = ml($image, $r_more);
1245
1246    // slider
1247    echo '<div class="slider" style="max-width: '.($l_size[0]-20).'px;" ></div>'.NL;
1248
1249    // two images in divs
1250    echo '<div class="imageDiff ' . $type . '">'.NL;
1251    echo '<div class="image1" style="max-width: '.$l_size[0].'px;">';
1252    echo '<img src="'.$l_src.'" alt="" />';
1253    echo '</div>'.NL;
1254    echo '<div class="image2" style="max-width: '.$l_size[0].'px;">';
1255    echo '<img src="'.$r_src.'" alt="" />';
1256    echo '</div>'.NL;
1257    echo '</div>'.NL;
1258}
1259
1260/**
1261 * Restores an old revision of a media file
1262 *
1263 * @param string $image
1264 * @param int $rev
1265 * @param int $auth
1266 * @return string - file's id
1267 * @author Kate Arzamastseva <pshns@ukr.net>
1268 */
1269function media_restore($image, $rev, $auth){
1270    global $conf;
1271    if ($auth < AUTH_UPLOAD || !$conf['mediarevisions']) return false;
1272    $removed = (!file_exists(mediaFN($image)) && file_exists(mediaMetaFN($image, '.changes')));
1273    if (!$image || (!file_exists(mediaFN($image)) && !$removed)) return false;
1274    if (!$rev || !file_exists(mediaFN($image, $rev))) return false;
1275    list($iext,$imime,$dl) = mimetype($image);
1276    $res = media_upload_finish(mediaFN($image, $rev),
1277        mediaFN($image),
1278        $image,
1279        $imime,
1280        true,
1281        'copy');
1282    if (is_array($res)) {
1283        msg($res[0], $res[1]);
1284        return false;
1285    }
1286    return $res;
1287}
1288
1289/**
1290 * List all files found by the search request
1291 *
1292 * @author Tobias Sarnowski <sarnowski@cosmocode.de>
1293 * @author Andreas Gohr <gohr@cosmocode.de>
1294 * @author Kate Arzamastseva <pshns@ukr.net>
1295 * @triggers MEDIA_SEARCH
1296 */
1297function media_searchlist($query,$ns,$auth=null,$fullscreen=false,$sort=''){
1298    global $conf;
1299    global $lang;
1300
1301    $ns = cleanID($ns);
1302
1303    if ($query) {
1304        $evdata = array(
1305                'ns'    => $ns,
1306                'data'  => array(),
1307                'query' => $query
1308                );
1309        $evt = new Doku_Event('MEDIA_SEARCH', $evdata);
1310        if ($evt->advise_before()) {
1311            $dir = utf8_encodeFN(str_replace(':','/',$evdata['ns']));
1312            $pattern = '/'.preg_quote($evdata['query'],'/').'/i';
1313            search($evdata['data'],
1314                    $conf['mediadir'],
1315                    'search_media',
1316                    array('showmsg'=>false,'pattern'=>$pattern),
1317                    $dir);
1318        }
1319
1320        $data = array();
1321        foreach ($evdata['data'] as $k => $v) {
1322            $data[$k] = ($sort == 'date') ? $v['mtime'] : $v['id'];
1323        }
1324        array_multisort($data, SORT_DESC, SORT_NUMERIC, $evdata['data']);
1325
1326        $evt->advise_after();
1327        unset($evt);
1328    }
1329
1330    if (!$fullscreen) {
1331        echo '<h1 id="media__ns">'.sprintf($lang['searchmedia_in'],hsc($ns).':*').'</h1>'.NL;
1332        media_searchform($ns,$query);
1333    }
1334
1335    if(!count($evdata['data'])){
1336        echo '<div class="nothing">'.$lang['nothingfound'].'</div>'.NL;
1337    }else {
1338        if ($fullscreen) {
1339            echo '<ul class="' . _media_get_list_type() . '">';
1340        }
1341        foreach($evdata['data'] as $item){
1342            if (!$fullscreen) media_printfile($item,$item['perm'],'',true);
1343            else media_printfile_thumbs($item,$item['perm'],false,true);
1344        }
1345        if ($fullscreen) echo '</ul>'.NL;
1346    }
1347}
1348
1349/**
1350 * Formats and prints one file in the list
1351 */
1352function media_printfile($item,$auth,$jump,$display_namespace=false){
1353    global $lang;
1354    global $conf;
1355
1356    // Prepare zebra coloring
1357    // I always wanted to use this variable name :-D
1358    static $twibble = 1;
1359    $twibble *= -1;
1360    $zebra = ($twibble == -1) ? 'odd' : 'even';
1361
1362    // Automatically jump to recent action
1363    if($jump == $item['id']) {
1364        $jump = ' id="scroll__here" ';
1365    }else{
1366        $jump = '';
1367    }
1368
1369    // Prepare fileicons
1370    list($ext,$mime,$dl) = mimetype($item['file'],false);
1371    $class = preg_replace('/[^_\-a-z0-9]+/i','_',$ext);
1372    $class = 'select mediafile mf_'.$class;
1373
1374    // Prepare filename
1375    $file = utf8_decodeFN($item['file']);
1376
1377    // Prepare info
1378    $info = '';
1379    if($item['isimg']){
1380        $info .= (int) $item['meta']->getField('File.Width');
1381        $info .= '&#215;';
1382        $info .= (int) $item['meta']->getField('File.Height');
1383        $info .= ' ';
1384    }
1385    $info .= '<i>'.dformat($item['mtime']).'</i>';
1386    $info .= ' ';
1387    $info .= filesize_h($item['size']);
1388
1389    // output
1390    echo '<div class="'.$zebra.'"'.$jump.' title="'.hsc($item['id']).'">'.NL;
1391    if (!$display_namespace) {
1392        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($file).'</a> ';
1393    } else {
1394        echo '<a id="h_:'.$item['id'].'" class="'.$class.'">'.hsc($item['id']).'</a><br/>';
1395    }
1396    echo '<span class="info">('.$info.')</span>'.NL;
1397
1398    // view button
1399    $link = ml($item['id'],'',true);
1400    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/magnifier.png" '.
1401        'alt="'.$lang['mediaview'].'" title="'.$lang['mediaview'].'" class="btn" /></a>';
1402
1403    // mediamanager button
1404    $link = wl('',array('do'=>'media','image'=>$item['id'],'ns'=>getNS($item['id'])));
1405    echo ' <a href="'.$link.'" target="_blank"><img src="'.DOKU_BASE.'lib/images/mediamanager.png" '.
1406        'alt="'.$lang['btn_media'].'" title="'.$lang['btn_media'].'" class="btn" /></a>';
1407
1408    // delete button
1409    if($item['writable'] && $auth >= AUTH_DELETE){
1410        $link = DOKU_BASE.'lib/exe/mediamanager.php?delete='.rawurlencode($item['id']).
1411            '&amp;sectok='.getSecurityToken();
1412        echo ' <a href="'.$link.'" class="btn_media_delete" title="'.$item['id'].'">'.
1413            '<img src="'.DOKU_BASE.'lib/images/trash.png" alt="'.$lang['btn_delete'].'" '.
1414            'title="'.$lang['btn_delete'].'" class="btn" /></a>';
1415    }
1416
1417    echo '<div class="example" id="ex_'.str_replace(':','_',$item['id']).'">';
1418    echo $lang['mediausage'].' <code>{{:'.$item['id'].'}}</code>';
1419    echo '</div>';
1420    if($item['isimg']) media_printimgdetail($item);
1421    echo '<div class="clearer"></div>'.NL;
1422    echo '</div>'.NL;
1423}
1424
1425function media_printicon($filename){
1426    list($ext,$mime,$dl) = mimetype(mediaFN($filename),false);
1427
1428    if (@file_exists(DOKU_INC.'lib/images/fileicons/'.$ext.'.png')) {
1429        $icon = DOKU_BASE.'lib/images/fileicons/'.$ext.'.png';
1430    } else {
1431        $icon = DOKU_BASE.'lib/images/fileicons/file.png';
1432    }
1433
1434    return '<img src="'.$icon.'" alt="'.$filename.'" class="icon" />';
1435
1436}
1437
1438/**
1439 * Formats and prints one file in the list in the thumbnails view
1440 *
1441 * @author Kate Arzamastseva <pshns@ukr.net>
1442 */
1443function media_printfile_thumbs($item,$auth,$jump=false,$display_namespace=false){
1444    global $lang;
1445    global $conf;
1446
1447    // Prepare filename
1448    $file = utf8_decodeFN($item['file']);
1449
1450    // output
1451    echo '<li><dl title="'.hsc($item['id']).'">'.NL;
1452
1453        echo '<dt>';
1454    if($item['isimg']) {
1455        media_printimgdetail($item, true);
1456
1457    } else {
1458        echo '<a id="d_:'.$item['id'].'" class="image" title="'.$item['id'].'" href="'.
1459            media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1460            'tab_details' => 'view')).'">';
1461        echo media_printicon($item['id']);
1462        echo '</a>';
1463    }
1464    echo '</dt>'.NL;
1465    if (!$display_namespace) {
1466        $name = hsc($file);
1467    } else {
1468        $name = hsc($item['id']);
1469    }
1470    echo '<dd class="name"><a href="'.media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']),
1471        'tab_details' => 'view')).'" id="h_:'.$item['id'].'">'.$name.'</a></dd>'.NL;
1472
1473    if($item['isimg']){
1474        $size = '';
1475        $size .= (int) $item['meta']->getField('File.Width');
1476        $size .= '&#215;';
1477        $size .= (int) $item['meta']->getField('File.Height');
1478        echo '<dd class="size">'.$size.'</dd>'.NL;
1479    } else {
1480        echo '<dd class="size">&#160;</dd>'.NL;
1481    }
1482    $date = dformat($item['mtime']);
1483    echo '<dd class="date">'.$date.'</dd>'.NL;
1484    $filesize = filesize_h($item['size']);
1485    echo '<dd class="filesize">'.$filesize.'</dd>'.NL;
1486    echo '</dl></li>'.NL;
1487}
1488
1489/**
1490 * Prints a thumbnail and metainfos
1491 */
1492function media_printimgdetail($item, $fullscreen=false){
1493    // prepare thumbnail
1494    $size = $fullscreen ? 90 : 120;
1495
1496    $w = (int) $item['meta']->getField('File.Width');
1497    $h = (int) $item['meta']->getField('File.Height');
1498    if($w>$size || $h>$size){
1499        if (!$fullscreen) {
1500            $ratio = $item['meta']->getResizeRatio($size);
1501        } else {
1502            $ratio = $item['meta']->getResizeRatio($size,$size);
1503        }
1504        $w = floor($w * $ratio);
1505        $h = floor($h * $ratio);
1506    }
1507    $src = ml($item['id'],array('w'=>$w,'h'=>$h,'t'=>$item['mtime']));
1508    $p = array();
1509    if (!$fullscreen) {
1510        // In fullscreen mediamanager view, image resizing is done via CSS.
1511        $p['width']  = $w;
1512        $p['height'] = $h;
1513    }
1514    $p['alt']    = $item['id'];
1515    $att = buildAttributes($p);
1516
1517    // output
1518    if ($fullscreen) {
1519        echo '<a id="l_:'.$item['id'].'" class="image thumb" href="'.
1520            media_managerURL(array('image' => hsc($item['id']), 'ns' => getNS($item['id']), 'tab_details' => 'view')).'">';
1521        echo '<img src="'.$src.'" '.$att.' />';
1522        echo '</a>';
1523    }
1524
1525    if ($fullscreen) return;
1526
1527    echo '<div class="detail">';
1528    echo '<div class="thumb">';
1529    echo '<a id="d_:'.$item['id'].'" class="select">';
1530    echo '<img src="'.$src.'" '.$att.' />';
1531    echo '</a>';
1532    echo '</div>';
1533
1534    // read EXIF/IPTC data
1535    $t = $item['meta']->getField(array('IPTC.Headline','xmp.dc:title'));
1536    $d = $item['meta']->getField(array('IPTC.Caption','EXIF.UserComment',
1537                'EXIF.TIFFImageDescription',
1538                'EXIF.TIFFUserComment'));
1539    if(utf8_strlen($d) > 250) $d = utf8_substr($d,0,250).'...';
1540    $k = $item['meta']->getField(array('IPTC.Keywords','IPTC.Category','xmp.dc:subject'));
1541
1542    // print EXIF/IPTC data
1543    if($t || $d || $k ){
1544        echo '<p>';
1545        if($t) echo '<strong>'.htmlspecialchars($t).'</strong><br />';
1546        if($d) echo htmlspecialchars($d).'<br />';
1547        if($t) echo '<em>'.htmlspecialchars($k).'</em>';
1548        echo '</p>';
1549    }
1550    echo '</div>';
1551}
1552
1553/**
1554 * Build link based on the current, adding/rewriting
1555 * parameters
1556 *
1557 * @author Kate Arzamastseva <pshns@ukr.net>
1558 * @param array $params
1559 * @param string $amp - separator
1560 * @return string - link
1561 */
1562function media_managerURL($params=false, $amp='&amp;', $abs=false, $params_array=false) {
1563    global $conf;
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]) / $info[0]);
1806
1807    // we wont scale up to infinity
1808    if($w > 2000 || $h > 2000) return $file;
1809
1810    // resize necessary? - (w,h) = native dimensions
1811    if(($w == $info[0]) && ($h == $info[1])) return $file;
1812
1813    //cache
1814    $local = getCacheName($file,'.media.'.$w.'x'.$h.'.'.$ext);
1815    $mtime = @filemtime($local); // 0 if not exists
1816
1817    if( $mtime > filemtime($file) ||
1818            media_resize_imageIM($ext,$file,$info[0],$info[1],$local,$w,$h) ||
1819            media_resize_imageGD($ext,$file,$info[0],$info[1],$local,$w,$h) ){
1820        if($conf['fperm']) chmod($local, $conf['fperm']);
1821        return $local;
1822    }
1823    //still here? resizing failed
1824    return $file;
1825}
1826
1827/**
1828 * Crops the given image to the wanted ratio, then calls media_resize_image to scale it
1829 * to the wanted size
1830 *
1831 * Crops are centered horizontally but prefer the upper third of an vertical
1832 * image because most pics are more interesting in that area (rule of thirds)
1833 *
1834 * @author  Andreas Gohr <andi@splitbrain.org>
1835 */
1836function media_crop_image($file, $ext, $w, $h=0){
1837    global $conf;
1838
1839    if(!$h) $h = $w;
1840    $info = @getimagesize($file); //get original size
1841    if($info == false) return $file; // that's no image - it's a spaceship!
1842
1843    // calculate crop size
1844    $fr = $info[0]/$info[1];
1845    $tr = $w/$h;
1846
1847    // check if the crop can be handled completely by resize,
1848    // i.e. the specified width & height match the aspect ratio of the source image
1849    if ($w == round($h*$fr)) {
1850        return media_resize_image($file, $ext, $w);
1851    }
1852
1853    if($tr >= 1){
1854        if($tr > $fr){
1855            $cw = $info[0];
1856            $ch = (int) ($info[0]/$tr);
1857        }else{
1858            $cw = (int) ($info[1]*$tr);
1859            $ch = $info[1];
1860        }
1861    }else{
1862        if($tr < $fr){
1863            $cw = (int) ($info[1]*$tr);
1864            $ch = $info[1];
1865        }else{
1866            $cw = $info[0];
1867            $ch = (int) ($info[0]/$tr);
1868        }
1869    }
1870    // calculate crop offset
1871    $cx = (int) (($info[0]-$cw)/2);
1872    $cy = (int) (($info[1]-$ch)/3);
1873
1874    //cache
1875    $local = getCacheName($file,'.media.'.$cw.'x'.$ch.'.crop.'.$ext);
1876    $mtime = @filemtime($local); // 0 if not exists
1877
1878    if( $mtime > @filemtime($file) ||
1879            media_crop_imageIM($ext,$file,$info[0],$info[1],$local,$cw,$ch,$cx,$cy) ||
1880            media_resize_imageGD($ext,$file,$cw,$ch,$local,$cw,$ch,$cx,$cy) ){
1881        if($conf['fperm']) chmod($local, $conf['fperm']);
1882        return media_resize_image($local,$ext, $w, $h);
1883    }
1884
1885    //still here? cropping failed
1886    return media_resize_image($file,$ext, $w, $h);
1887}
1888
1889/**
1890 * Calculate a token to be used to verify fetch requests for resized or
1891 * cropped images have been internally generated - and prevent external
1892 * DDOS attacks via fetch
1893 *
1894 * @author Christopher Smith <chris@jalakai.co.uk>
1895 *
1896 * @param string  $id    id of the image
1897 * @param int     $w     resize/crop width
1898 * @param int     $h     resize/crop height
1899 * @return string
1900 */
1901function media_get_token($id,$w,$h){
1902    // token is only required for modified images
1903    if ($w || $h) {
1904        $token = $id;
1905        if ($w) $token .= '.'.$w;
1906        if ($h) $token .= '.'.$h;
1907
1908        return substr(PassHash::hmac('md5', $token, auth_cookiesalt()),0,6);
1909    }
1910
1911    return '';
1912}
1913
1914/**
1915 * Download a remote file and return local filename
1916 *
1917 * returns false if download fails. Uses cached file if available and
1918 * wanted
1919 *
1920 * @author  Andreas Gohr <andi@splitbrain.org>
1921 * @author  Pavel Vitis <Pavel.Vitis@seznam.cz>
1922 */
1923function media_get_from_URL($url,$ext,$cache){
1924    global $conf;
1925
1926    // if no cache or fetchsize just redirect
1927    if ($cache==0)           return false;
1928    if (!$conf['fetchsize']) return false;
1929
1930    $local = getCacheName(strtolower($url),".media.$ext");
1931    $mtime = @filemtime($local); // 0 if not exists
1932
1933    //decide if download needed:
1934    if( ($mtime == 0) ||                           // cache does not exist
1935            ($cache != -1 && $mtime < time()-$cache)   // 'recache' and cache has expired
1936      ){
1937        if(media_image_download($url,$local)){
1938            return $local;
1939        }else{
1940            return false;
1941        }
1942    }
1943
1944    //if cache exists use it else
1945    if($mtime) return $local;
1946
1947    //else return false
1948    return false;
1949}
1950
1951/**
1952 * Download image files
1953 *
1954 * @author Andreas Gohr <andi@splitbrain.org>
1955 */
1956function media_image_download($url,$file){
1957    global $conf;
1958    $http = new DokuHTTPClient();
1959    $http->keep_alive = false; // we do single ops here, no need for keep-alive
1960
1961    $http->max_bodysize = $conf['fetchsize'];
1962    $http->timeout = 25; //max. 25 sec
1963    $http->header_regexp = '!\r\nContent-Type: image/(jpe?g|gif|png)!i';
1964
1965    $data = $http->get($url);
1966    if(!$data) return false;
1967
1968    $fileexists = @file_exists($file);
1969    $fp = @fopen($file,"w");
1970    if(!$fp) return false;
1971    fwrite($fp,$data);
1972    fclose($fp);
1973    if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
1974
1975    // check if it is really an image
1976    $info = @getimagesize($file);
1977    if(!$info){
1978        @unlink($file);
1979        return false;
1980    }
1981
1982    return true;
1983}
1984
1985/**
1986 * resize images using external ImageMagick convert program
1987 *
1988 * @author Pavel Vitis <Pavel.Vitis@seznam.cz>
1989 * @author Andreas Gohr <andi@splitbrain.org>
1990 */
1991function media_resize_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h){
1992    global $conf;
1993
1994    // check if convert is configured
1995    if(!$conf['im_convert']) return false;
1996
1997    // prepare command
1998    $cmd  = $conf['im_convert'];
1999    $cmd .= ' -resize '.$to_w.'x'.$to_h.'!';
2000    if ($ext == 'jpg' || $ext == 'jpeg') {
2001        $cmd .= ' -quality '.$conf['jpg_quality'];
2002    }
2003    $cmd .= " $from $to";
2004
2005    @exec($cmd,$out,$retval);
2006    if ($retval == 0) return true;
2007    return false;
2008}
2009
2010/**
2011 * crop images using external ImageMagick convert program
2012 *
2013 * @author Andreas Gohr <andi@splitbrain.org>
2014 */
2015function media_crop_imageIM($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x,$ofs_y){
2016    global $conf;
2017
2018    // check if convert is configured
2019    if(!$conf['im_convert']) return false;
2020
2021    // prepare command
2022    $cmd  = $conf['im_convert'];
2023    $cmd .= ' -crop '.$to_w.'x'.$to_h.'+'.$ofs_x.'+'.$ofs_y;
2024    if ($ext == 'jpg' || $ext == 'jpeg') {
2025        $cmd .= ' -quality '.$conf['jpg_quality'];
2026    }
2027    $cmd .= " $from $to";
2028
2029    @exec($cmd,$out,$retval);
2030    if ($retval == 0) return true;
2031    return false;
2032}
2033
2034/**
2035 * resize or crop images using PHP's libGD support
2036 *
2037 * @author Andreas Gohr <andi@splitbrain.org>
2038 * @author Sebastian Wienecke <s_wienecke@web.de>
2039 */
2040function media_resize_imageGD($ext,$from,$from_w,$from_h,$to,$to_w,$to_h,$ofs_x=0,$ofs_y=0){
2041    global $conf;
2042
2043    if($conf['gdlib'] < 1) return false; //no GDlib available or wanted
2044
2045    // check available memory
2046    if(!is_mem_available(($from_w * $from_h * 4) + ($to_w * $to_h * 4))){
2047        return false;
2048    }
2049
2050    // create an image of the given filetype
2051    if ($ext == 'jpg' || $ext == 'jpeg'){
2052        if(!function_exists("imagecreatefromjpeg")) return false;
2053        $image = @imagecreatefromjpeg($from);
2054    }elseif($ext == 'png') {
2055        if(!function_exists("imagecreatefrompng")) return false;
2056        $image = @imagecreatefrompng($from);
2057
2058    }elseif($ext == 'gif') {
2059        if(!function_exists("imagecreatefromgif")) return false;
2060        $image = @imagecreatefromgif($from);
2061    }
2062    if(!$image) return false;
2063
2064    if(($conf['gdlib']>1) && function_exists("imagecreatetruecolor") && $ext != 'gif'){
2065        $newimg = @imagecreatetruecolor ($to_w, $to_h);
2066    }
2067    if(!$newimg) $newimg = @imagecreate($to_w, $to_h);
2068    if(!$newimg){
2069        imagedestroy($image);
2070        return false;
2071    }
2072
2073    //keep png alpha channel if possible
2074    if($ext == 'png' && $conf['gdlib']>1 && function_exists('imagesavealpha')){
2075        imagealphablending($newimg, false);
2076        imagesavealpha($newimg,true);
2077    }
2078
2079    //keep gif transparent color if possible
2080    if($ext == 'gif' && function_exists('imagefill') && function_exists('imagecolorallocate')) {
2081        if(function_exists('imagecolorsforindex') && function_exists('imagecolortransparent')) {
2082            $transcolorindex = @imagecolortransparent($image);
2083            if($transcolorindex >= 0 ) { //transparent color exists
2084                $transcolor = @imagecolorsforindex($image, $transcolorindex);
2085                $transcolorindex = @imagecolorallocate($newimg, $transcolor['red'], $transcolor['green'], $transcolor['blue']);
2086                @imagefill($newimg, 0, 0, $transcolorindex);
2087                @imagecolortransparent($newimg, $transcolorindex);
2088            }else{ //filling with white
2089                $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2090                @imagefill($newimg, 0, 0, $whitecolorindex);
2091            }
2092        }else{ //filling with white
2093            $whitecolorindex = @imagecolorallocate($newimg, 255, 255, 255);
2094            @imagefill($newimg, 0, 0, $whitecolorindex);
2095        }
2096    }
2097
2098    //try resampling first
2099    if(function_exists("imagecopyresampled")){
2100        if(!@imagecopyresampled($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h)) {
2101            imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2102        }
2103    }else{
2104        imagecopyresized($newimg, $image, 0, 0, $ofs_x, $ofs_y, $to_w, $to_h, $from_w, $from_h);
2105    }
2106
2107    $okay = false;
2108    if ($ext == 'jpg' || $ext == 'jpeg'){
2109        if(!function_exists('imagejpeg')){
2110            $okay = false;
2111        }else{
2112            $okay = imagejpeg($newimg, $to, $conf['jpg_quality']);
2113        }
2114    }elseif($ext == 'png') {
2115        if(!function_exists('imagepng')){
2116            $okay = false;
2117        }else{
2118            $okay =  imagepng($newimg, $to);
2119        }
2120    }elseif($ext == 'gif') {
2121        if(!function_exists('imagegif')){
2122            $okay = false;
2123        }else{
2124            $okay = imagegif($newimg, $to);
2125        }
2126    }
2127
2128    // destroy GD image ressources
2129    if($image) imagedestroy($image);
2130    if($newimg) imagedestroy($newimg);
2131
2132    return $okay;
2133}
2134
2135/**
2136 * Return other media files with the same base name
2137 * but different extensions.
2138 *
2139 * @param string $src       - ID of media file
2140 * @param array $exts       - alternative extensions to find other files for
2141 * @return array            - mime type => file ID
2142 *
2143 * @author Anika Henke <anika@selfthinker.org>
2144 */
2145function media_alternativefiles($src, $exts){
2146
2147    $files = array();
2148    list($srcExt, $srcMime) = mimetype($src);
2149    $filebase = substr($src, 0, -1 * (strlen($srcExt)+1));
2150
2151    foreach($exts as $ext) {
2152        $fileid = $filebase.'.'.$ext;
2153        $file = mediaFN($fileid);
2154        if(file_exists($file)) {
2155            list($fileExt, $fileMime) = mimetype($file);
2156            $files[$fileMime] = $fileid;
2157        }
2158    }
2159    return $files;
2160}
2161
2162/**
2163 * Check if video/audio is supported to be embedded.
2164 *
2165 * @param string $src       - mimetype of media file
2166 * @param string $type      - type of media files to check ('video', 'audio', or none)
2167 * @return boolean
2168 *
2169 * @author Anika Henke <anika@selfthinker.org>
2170 */
2171function media_supportedav($mime, $type=NULL){
2172    $supportedAudio = array(
2173        'ogg' => 'audio/ogg',
2174        'mp3' => 'audio/mpeg',
2175        'wav' => 'audio/wav',
2176    );
2177    $supportedVideo = array(
2178        'webm' => 'video/webm',
2179        'ogv' => 'video/ogg',
2180        'mp4' => 'video/mp4',
2181    );
2182    if ($type == 'audio') {
2183        $supportedAv = $supportedAudio;
2184    } elseif ($type == 'video') {
2185        $supportedAv = $supportedVideo;
2186    } else {
2187        $supportedAv = array_merge($supportedAudio, $supportedVideo);
2188    }
2189    return in_array($mime, $supportedAv);
2190}
2191
2192/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
2193