xref: /dokuwiki/inc/actions.php (revision 4d1e8edfed1d8b8025e900215ae05d0633b2a27f) 
1<?php
2/**
3 * DokuWiki Actions
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.');
10
11/**
12 * Call the needed action handlers
13 *
14 * @author Andreas Gohr <andi@splitbrain.org>
15 * @triggers ACTION_ACT_PREPROCESS
16 * @triggers ACTION_HEADERS_SEND
17 */
18function act_dispatch(){
19    global $ACT;
20    global $ID;
21    global $INFO;
22    global $QUERY;
23    /* @var Input $INPUT */
24    global $INPUT;
25    global $lang;
26    global $conf;
27
28    $preact = $ACT;
29
30    // give plugins an opportunity to process the action
31    $evt = new Doku_Event('ACTION_ACT_PREPROCESS',$ACT);
32    if ($evt->advise_before()) {
33
34        //sanitize $ACT
35        $ACT = act_validate($ACT);
36
37        //check if searchword was given - else just show
38        $s = cleanID($QUERY);
39        if($ACT == 'search' && empty($s)){
40            $ACT = 'show';
41        }
42
43        //login stuff
44        if(in_array($ACT,array('login','logout'))){
45            $ACT = act_auth($ACT);
46        }
47
48        //check if user is asking to (un)subscribe a page
49        if($ACT == 'subscribe') {
50            try {
51                $ACT = act_subscription($ACT);
52            } catch (Exception $e) {
53                msg($e->getMessage(), -1);
54            }
55        }
56
57        //display some info
58        if($ACT == 'check'){
59            check();
60            $ACT = 'show';
61        }
62
63        //check permissions
64        $ACT = act_permcheck($ACT);
65
66        //sitemap
67        if ($ACT == 'sitemap'){
68            act_sitemap($ACT);
69        }
70
71        //recent changes
72        if ($ACT == 'recent'){
73            $show_changes = $INPUT->str('show_changes');
74            if (!empty($show_changes)) {
75                set_doku_pref('show_changes', $show_changes);
76            }
77        }
78
79        //diff
80        if ($ACT == 'diff'){
81            $difftype = $INPUT->str('difftype');
82            if (!empty($difftype)) {
83                set_doku_pref('difftype', $difftype);
84            }
85        }
86
87        //register
88        if($ACT == 'register' && $INPUT->post->bool('save') && register()){
89            $ACT = 'login';
90        }
91
92        if ($ACT == 'resendpwd' && act_resendpwd()) {
93            $ACT = 'login';
94        }
95
96        // user profile changes
97        if (in_array($ACT, array('profile','profile_delete'))) {
98            if(!$INPUT->server->str('REMOTE_USER')) {
99                $ACT = 'login';
100            } else {
101                switch ($ACT) {
102                    case 'profile' :
103                        if(updateprofile()) {
104                            msg($lang['profchanged'],1);
105                            $ACT = 'show';
106                        }
107                        break;
108                    case 'profile_delete' :
109                        if(auth_deleteprofile()){
110                            msg($lang['profdeleted'],1);
111                            $ACT = 'show';
112                        } else {
113                            $ACT = 'profile';
114                        }
115                        break;
116                }
117            }
118        }
119
120        //revert
121        if($ACT == 'revert'){
122            if(checkSecurityToken()){
123                $ACT = act_revert($ACT);
124            }else{
125                $ACT = 'show';
126            }
127        }
128
129        //save
130        if($ACT == 'save'){
131            if(checkSecurityToken()){
132                $ACT = act_save($ACT);
133            }else{
134                $ACT = 'preview';
135            }
136        }
137
138        //cancel conflicting edit
139        if($ACT == 'cancel')
140            $ACT = 'show';
141
142        //draft deletion
143        if($ACT == 'draftdel')
144            $ACT = act_draftdel($ACT);
145
146        //draft saving on preview
147        if($ACT == 'preview')
148            $ACT = act_draftsave($ACT);
149
150        //edit
151        if(in_array($ACT, array('edit', 'preview', 'recover'))) {
152            $ACT = act_edit($ACT);
153        }else{
154            unlock($ID); //try to unlock
155        }
156
157        //handle export
158        if(substr($ACT,0,7) == 'export_')
159            $ACT = act_export($ACT);
160
161        //handle admin tasks
162        if($ACT == 'admin'){
163            // retrieve admin plugin name from $_REQUEST['page']
164            if (($page = $INPUT->str('page', '', true)) != '') {
165                $pluginlist = plugin_list('admin');
166                if (in_array($page, $pluginlist)) {
167                    // attempt to load the plugin
168
169                    if (($plugin = plugin_load('admin',$page)) !== null){
170                        /** @var DokuWiki_Admin_Plugin $plugin */
171                        if($plugin->forAdminOnly() && !$INFO['isadmin']){
172                            // a manager tried to load a plugin that's for admins only
173                            $INPUT->remove('page');
174                            msg('For admins only',-1);
175                        }else{
176                            $plugin->handle();
177                        }
178                    }
179                }
180            }
181        }
182
183        // check permissions again - the action may have changed
184        $ACT = act_permcheck($ACT);
185    }  // end event ACTION_ACT_PREPROCESS default action
186    $evt->advise_after();
187    // Make sure plugs can handle 'denied'
188    if($conf['send404'] && $ACT == 'denied') {
189        http_status(403);
190    }
191    unset($evt);
192
193    // when action 'show', the intial not 'show' and POST, do a redirect
194    if($ACT == 'show' && $preact != 'show' && strtolower($INPUT->server->str('REQUEST_METHOD')) == 'post'){
195        act_redirect($ID,$preact);
196    }
197
198    global $INFO;
199    global $conf;
200    global $license;
201
202    //call template FIXME: all needed vars available?
203    $headers = array();
204    $headers[] = 'Content-Type: text/html; charset=utf-8';
205    trigger_event('ACTION_HEADERS_SEND',$headers,'act_sendheaders');
206
207    include(template('main.php'));
208    // output for the commands is now handled in inc/templates.php
209    // in function tpl_content()
210}
211
212/**
213 * Send the given headers using header()
214 *
215 * @param array $headers The headers that shall be sent
216 */
217function act_sendheaders($headers) {
218    foreach ($headers as $hdr) header($hdr);
219}
220
221/**
222 * Sanitize the action command
223 *
224 * @author Andreas Gohr <andi@splitbrain.org>
225 *
226 * @param array|string $act
227 * @return string
228 */
229function act_clean($act){
230    // check if the action was given as array key
231    if(is_array($act)){
232        list($act) = array_keys($act);
233    }
234
235    //remove all bad chars
236    $act = strtolower($act);
237    $act = preg_replace('/[^1-9a-z_]+/','',$act);
238
239    if($act == 'export_html') $act = 'export_xhtml';
240    if($act == 'export_htmlbody') $act = 'export_xhtmlbody';
241
242    if($act === '') $act = 'show';
243    return $act;
244}
245
246/**
247 * Sanitize and validate action commands.
248 *
249 * Add all allowed commands here.
250 *
251 * @author Andreas Gohr <andi@splitbrain.org>
252 *
253 * @param array|string $act
254 * @return string
255 */
256function act_validate($act) {
257    global $conf;
258    global $INFO;
259
260    $act = act_clean($act);
261
262    // check if action is disabled
263    if(!actionOK($act)){
264        msg('Command disabled: '.htmlspecialchars($act),-1);
265        return 'show';
266    }
267
268    //disable all acl related commands if ACL is disabled
269    if(!$conf['useacl'] && in_array($act,array('login','logout','register','admin',
270                    'subscribe','unsubscribe','profile','revert',
271                    'resendpwd','profile_delete'))){
272        msg('Command unavailable: '.htmlspecialchars($act),-1);
273        return 'show';
274    }
275
276    //is there really a draft?
277    if($act == 'draft' && !file_exists($INFO['draft'])) return 'edit';
278
279    if(!in_array($act,array('login','logout','register','save','cancel','edit','draft',
280                    'preview','search','show','check','index','revisions',
281                    'diff','recent','backlink','admin','subscribe','revert',
282                    'unsubscribe','profile','profile_delete','resendpwd','recover',
283                    'draftdel','sitemap','media')) && substr($act,0,7) != 'export_' ) {
284        msg('Command unknown: '.htmlspecialchars($act),-1);
285        return 'show';
286    }
287    return $act;
288}
289
290/**
291 * Run permissionchecks
292 *
293 * @author Andreas Gohr <andi@splitbrain.org>
294 *
295 * @param string $act action command
296 * @return string action command
297 */
298function act_permcheck($act){
299    global $INFO;
300
301    if(in_array($act,array('save','preview','edit','recover'))){
302        if($INFO['exists']){
303            if($act == 'edit'){
304                //the edit function will check again and do a source show
305                //when no AUTH_EDIT available
306                $permneed = AUTH_READ;
307            }else{
308                $permneed = AUTH_EDIT;
309            }
310        }else{
311            $permneed = AUTH_CREATE;
312        }
313    }elseif(in_array($act,array('login','search','recent','profile','profile_delete','index', 'sitemap'))){
314        $permneed = AUTH_NONE;
315    }elseif($act == 'revert'){
316        $permneed = AUTH_ADMIN;
317        if($INFO['ismanager']) $permneed = AUTH_EDIT;
318    }elseif($act == 'register'){
319        $permneed = AUTH_NONE;
320    }elseif($act == 'resendpwd'){
321        $permneed = AUTH_NONE;
322    }elseif($act == 'admin'){
323        if($INFO['ismanager']){
324            // if the manager has the needed permissions for a certain admin
325            // action is checked later
326            $permneed = AUTH_READ;
327        }else{
328            $permneed = AUTH_ADMIN;
329        }
330    }else{
331        $permneed = AUTH_READ;
332    }
333    if($INFO['perm'] >= $permneed) return $act;
334
335    return 'denied';
336}
337
338/**
339 * Handle 'draftdel'
340 *
341 * Deletes the draft for the current page and user
342 *
343 * @param string $act action command
344 * @return string action command
345 */
346function act_draftdel($act){
347    global $INFO;
348    @unlink($INFO['draft']);
349    $INFO['draft'] = null;
350    return 'show';
351}
352
353/**
354 * Saves a draft on preview
355 *
356 * @todo this currently duplicates code from ajax.php :-/
357 *
358 * @param string $act action command
359 * @return string action command
360 */
361function act_draftsave($act){
362    global $INFO;
363    global $ID;
364    global $INPUT;
365    global $conf;
366    if($conf['usedraft'] && $INPUT->post->has('wikitext')) {
367        $draft = array('id'     => $ID,
368                'prefix' => substr($INPUT->post->str('prefix'), 0, -1),
369                'text'   => $INPUT->post->str('wikitext'),
370                'suffix' => $INPUT->post->str('suffix'),
371                'date'   => $INPUT->post->int('date'),
372                'client' => $INFO['client'],
373                );
374        $cname = getCacheName($draft['client'].$ID,'.draft');
375        if(io_saveFile($cname,serialize($draft))){
376            $INFO['draft'] = $cname;
377        }
378    }
379    return $act;
380}
381
382/**
383 * Handle 'save'
384 *
385 * Checks for spam and conflicts and saves the page.
386 * Does a redirect to show the page afterwards or
387 * returns a new action.
388 *
389 * @author Andreas Gohr <andi@splitbrain.org>
390 *
391 * @param string $act action command
392 * @return string action command
393 */
394function act_save($act){
395    global $ID;
396    global $DATE;
397    global $PRE;
398    global $TEXT;
399    global $SUF;
400    global $SUM;
401    global $lang;
402    global $INFO;
403    global $INPUT;
404
405    //spam check
406    if(checkwordblock()) {
407        msg($lang['wordblock'], -1);
408        return 'edit';
409    }
410    //conflict check
411    if($DATE != 0 && $INFO['meta']['date']['modified'] > $DATE )
412        return 'conflict';
413
414    //save it
415    saveWikiText($ID,con($PRE,$TEXT,$SUF,true),$SUM,$INPUT->bool('minor')); //use pretty mode for con
416    //unlock it
417    unlock($ID);
418
419    //delete draft
420    act_draftdel($act);
421    session_write_close();
422
423    // when done, show page
424    return 'show';
425}
426
427/**
428 * Revert to a certain revision
429 *
430 * @author Andreas Gohr <andi@splitbrain.org>
431 *
432 * @param string $act action command
433 * @return string action command
434 */
435function act_revert($act){
436    global $ID;
437    global $REV;
438    global $lang;
439    /* @var Input $INPUT */
440    global $INPUT;
441    // FIXME $INFO['writable'] currently refers to the attic version
442    // global $INFO;
443    // if (!$INFO['writable']) {
444    //     return 'show';
445    // }
446
447    // when no revision is given, delete current one
448    // FIXME this feature is not exposed in the GUI currently
449    $text = '';
450    $sum  = $lang['deleted'];
451    if($REV){
452        $text = rawWiki($ID,$REV);
453        if(!$text) return 'show'; //something went wrong
454        $sum = sprintf($lang['restored'], dformat($REV));
455    }
456
457    // spam check
458
459    if (checkwordblock($text)) {
460        msg($lang['wordblock'], -1);
461        return 'edit';
462    }
463
464    saveWikiText($ID,$text,$sum,false);
465    msg($sum,1);
466
467    //delete any draft
468    act_draftdel($act);
469    session_write_close();
470
471    // when done, show current page
472    $INPUT->server->set('REQUEST_METHOD','post'); //should force a redirect
473    $REV = '';
474    return 'show';
475}
476
477/**
478 * Do a redirect after receiving post data
479 *
480 * Tries to add the section id as hash mark after section editing
481 *
482 * @param string $id page id
483 * @param string $preact action command before redirect
484 */
485function act_redirect($id,$preact){
486    global $PRE;
487    global $TEXT;
488
489    $opts = array(
490            'id'       => $id,
491            'preact'   => $preact
492            );
493    //get section name when coming from section edit
494    if($PRE && preg_match('/^\s*==+([^=\n]+)/',$TEXT,$match)){
495        $check = false; //Byref
496        $opts['fragment'] = sectionID($match[0], $check);
497    }
498
499    trigger_event('ACTION_SHOW_REDIRECT',$opts,'act_redirect_execute');
500}
501
502/**
503 * Execute the redirect
504 *
505 * @param array $opts id and fragment for the redirect and the preact
506 */
507function act_redirect_execute($opts){
508    $go = wl($opts['id'],'',true);
509    if(isset($opts['fragment'])) $go .= '#'.$opts['fragment'];
510
511    //show it
512    send_redirect($go);
513}
514
515/**
516 * Handle 'login', 'logout'
517 *
518 * @author Andreas Gohr <andi@splitbrain.org>
519 *
520 * @param string $act action command
521 * @return string action command
522 */
523function act_auth($act){
524    global $ID;
525    global $INFO;
526    /* @var Input $INPUT */
527    global $INPUT;
528
529    //already logged in?
530    if($INPUT->server->has('REMOTE_USER') && $act=='login'){
531        return 'show';
532    }
533
534    //handle logout
535    if($act=='logout'){
536        $lockedby = checklock($ID); //page still locked?
537        if($lockedby == $INPUT->server->str('REMOTE_USER')){
538            unlock($ID); //try to unlock
539        }
540
541        // do the logout stuff
542        auth_logoff();
543
544        // rebuild info array
545        $INFO = pageinfo();
546
547        act_redirect($ID,'login');
548    }
549
550    return $act;
551}
552
553/**
554 * Handle 'edit', 'preview', 'recover'
555 *
556 * @author Andreas Gohr <andi@splitbrain.org>
557 *
558 * @param string $act action command
559 * @return string action command
560 */
561function act_edit($act){
562    global $ID;
563    global $INFO;
564
565    global $TEXT;
566    global $RANGE;
567    global $PRE;
568    global $SUF;
569    global $REV;
570    global $SUM;
571    global $lang;
572    global $DATE;
573
574    if (!isset($TEXT)) {
575        if ($INFO['exists']) {
576            if ($RANGE) {
577                list($PRE,$TEXT,$SUF) = rawWikiSlices($RANGE,$ID,$REV);
578            } else {
579                $TEXT = rawWiki($ID,$REV);
580            }
581        } else {
582            $TEXT = pageTemplate($ID);
583        }
584    }
585
586    //set summary default
587    if(!$SUM){
588        if($REV){
589            $SUM = sprintf($lang['restored'], dformat($REV));
590        }elseif(!$INFO['exists']){
591            $SUM = $lang['created'];
592        }
593    }
594
595    // Use the date of the newest revision, not of the revision we edit
596    // This is used for conflict detection
597    if(!$DATE) $DATE = @filemtime(wikiFN($ID));
598
599    //check if locked by anyone - if not lock for my self
600    //do not lock when the user can't edit anyway
601    if ($INFO['writable']) {
602        $lockedby = checklock($ID);
603        if($lockedby) return 'locked';
604
605        lock($ID);
606    }
607
608    return $act;
609}
610
611/**
612 * Export a wiki page for various formats
613 *
614 * Triggers ACTION_EXPORT_POSTPROCESS
615 *
616 *  Event data:
617 *    data['id']      -- page id
618 *    data['mode']    -- requested export mode
619 *    data['headers'] -- export headers
620 *    data['output']  -- export output
621 *
622 * @author Andreas Gohr <andi@splitbrain.org>
623 * @author Michael Klier <chi@chimeric.de>
624 *
625 * @param string $act action command
626 * @return string action command
627 */
628function act_export($act){
629    global $ID;
630    global $REV;
631    global $conf;
632    global $lang;
633
634    $pre = '';
635    $post = '';
636    $headers = array();
637
638    // search engines: never cache exported docs! (Google only currently)
639    $headers['X-Robots-Tag'] = 'noindex';
640
641    $mode = substr($act,7);
642    switch($mode) {
643        case 'raw':
644            $headers['Content-Type'] = 'text/plain; charset=utf-8';
645            $headers['Content-Disposition'] = 'attachment; filename='.noNS($ID).'.txt';
646            $output = rawWiki($ID,$REV);
647            break;
648        case 'xhtml':
649            $pre .= '<!DOCTYPE html>' . DOKU_LF;
650            $pre .= '<html lang="'.$conf['lang'].'" dir="'.$lang['direction'].'">' . DOKU_LF;
651            $pre .= '<head>' . DOKU_LF;
652            $pre .= '  <meta charset="utf-8" />' . DOKU_LF;
653            $pre .= '  <title>'.$ID.'</title>' . DOKU_LF;
654
655            // get metaheaders
656            ob_start();
657            tpl_metaheaders();
658            $pre .= ob_get_clean();
659
660            $pre .= '</head>' . DOKU_LF;
661            $pre .= '<body>' . DOKU_LF;
662            $pre .= '<div class="dokuwiki export">' . DOKU_LF;
663
664            // get toc
665            $pre .= tpl_toc(true);
666
667            $headers['Content-Type'] = 'text/html; charset=utf-8';
668            $output = p_wiki_xhtml($ID,$REV,false);
669
670            $post .= '</div>' . DOKU_LF;
671            $post .= '</body>' . DOKU_LF;
672            $post .= '</html>' . DOKU_LF;
673            break;
674        case 'xhtmlbody':
675            $headers['Content-Type'] = 'text/html; charset=utf-8';
676            $output = p_wiki_xhtml($ID,$REV,false);
677            break;
678        default:
679            $output = p_cached_output(wikiFN($ID,$REV), $mode, $ID);
680            $headers = p_get_metadata($ID,"format $mode");
681            break;
682    }
683
684    // prepare event data
685    $data = array();
686    $data['id'] = $ID;
687    $data['mode'] = $mode;
688    $data['headers'] = $headers;
689    $data['output'] =& $output;
690
691    trigger_event('ACTION_EXPORT_POSTPROCESS', $data);
692
693    if(!empty($data['output'])){
694        if(is_array($data['headers'])) foreach($data['headers'] as $key => $val){
695            header("$key: $val");
696        }
697        print $pre.$data['output'].$post;
698        exit;
699    }
700    return 'show';
701}
702
703/**
704 * Handle sitemap delivery
705 *
706 * @author Michael Hamann <michael@content-space.de>
707 *
708 * @param string $act action command
709 */
710function act_sitemap($act) {
711    global $conf;
712
713    if ($conf['sitemap'] < 1 || !is_numeric($conf['sitemap'])) {
714        http_status(404);
715        print "Sitemap generation is disabled.";
716        exit;
717    }
718
719    $sitemap = Sitemapper::getFilePath();
720    if (Sitemapper::sitemapIsCompressed()) {
721        $mime = 'application/x-gzip';
722    }else{
723        $mime = 'application/xml; charset=utf-8';
724    }
725
726    // Check if sitemap file exists, otherwise create it
727    if (!is_readable($sitemap)) {
728        Sitemapper::generate();
729    }
730
731    if (is_readable($sitemap)) {
732        // Send headers
733        header('Content-Type: '.$mime);
734        header('Content-Disposition: attachment; filename='.utf8_basename($sitemap));
735
736        http_conditionalRequest(filemtime($sitemap));
737
738        // Send file
739        //use x-sendfile header to pass the delivery to compatible webservers
740        http_sendfile($sitemap);
741
742        readfile($sitemap);
743        exit;
744    }
745
746    http_status(500);
747    print "Could not read the sitemap file - bad permissions?";
748    exit;
749}
750
751/**
752 * Handle page 'subscribe'
753 *
754 * Throws exception on error.
755 *
756 * @author Adrian Lang <lang@cosmocode.de>
757 *
758 * @param string $act action command
759 * @return string action command
760 * @throws Exception if (un)subscribing fails
761 */
762function act_subscription($act){
763    global $lang;
764    global $INFO;
765    global $ID;
766    /* @var Input $INPUT */
767    global $INPUT;
768
769    // subcriptions work for logged in users only
770    if(!$INPUT->server->str('REMOTE_USER')) return 'show';
771
772    // get and preprocess data.
773    $params = array();
774    foreach(array('target', 'style', 'action') as $param) {
775        if ($INPUT->has("sub_$param")) {
776            $params[$param] = $INPUT->str("sub_$param");
777        }
778    }
779
780    // any action given? if not just return and show the subscription page
781    if(empty($params['action']) || !checkSecurityToken()) return $act;
782
783    // Handle POST data, may throw exception.
784    trigger_event('ACTION_HANDLE_SUBSCRIBE', $params, 'subscription_handle_post');
785
786    $target = $params['target'];
787    $style  = $params['style'];
788    $action = $params['action'];
789
790    // Perform action.
791    $sub = new Subscription();
792    if($action == 'unsubscribe'){
793        $ok = $sub->remove($target, $INPUT->server->str('REMOTE_USER'), $style);
794    }else{
795        $ok = $sub->add($target, $INPUT->server->str('REMOTE_USER'), $style);
796    }
797
798    if($ok) {
799        msg(sprintf($lang["subscr_{$action}_success"], hsc($INFO['userinfo']['name']),
800                    prettyprint_id($target)), 1);
801        act_redirect($ID, $act);
802    } else {
803        throw new Exception(sprintf($lang["subscr_{$action}_error"],
804                                    hsc($INFO['userinfo']['name']),
805                                    prettyprint_id($target)));
806    }
807
808    // Assure that we have valid data if act_redirect somehow fails.
809    $INFO['subscribed'] = $sub->user_subscription();
810    return 'show';
811}
812
813/**
814 * Validate POST data
815 *
816 * Validates POST data for a subscribe or unsubscribe request. This is the
817 * default action for the event ACTION_HANDLE_SUBSCRIBE.
818 *
819 * @author Adrian Lang <lang@cosmocode.de>
820 *
821 * @param array &$params the parameters: target, style and action
822 * @throws Exception
823 */
824function subscription_handle_post(&$params) {
825    global $INFO;
826    global $lang;
827    /* @var Input $INPUT */
828    global $INPUT;
829
830    // Get and validate parameters.
831    if (!isset($params['target'])) {
832        throw new Exception('no subscription target given');
833    }
834    $target = $params['target'];
835    $valid_styles = array('every', 'digest');
836    if (substr($target, -1, 1) === ':') {
837        // Allow “list” subscribe style since the target is a namespace.
838        $valid_styles[] = 'list';
839    }
840    $style  = valid_input_set('style', $valid_styles, $params,
841                              'invalid subscription style given');
842    $action = valid_input_set('action', array('subscribe', 'unsubscribe'),
843                              $params, 'invalid subscription action given');
844
845    // Check other conditions.
846    if ($action === 'subscribe') {
847        if ($INFO['userinfo']['mail'] === '') {
848            throw new Exception($lang['subscr_subscribe_noaddress']);
849        }
850    } elseif ($action === 'unsubscribe') {
851        $is = false;
852        foreach($INFO['subscribed'] as $subscr) {
853            if ($subscr['target'] === $target) {
854                $is = true;
855            }
856        }
857        if ($is === false) {
858            throw new Exception(sprintf($lang['subscr_not_subscribed'],
859                                        $INPUT->server->str('REMOTE_USER'),
860                                        prettyprint_id($target)));
861        }
862        // subscription_set deletes a subscription if style = null.
863        $style = null;
864    }
865
866    $params = compact('target', 'style', 'action');
867}
868
869//Setup VIM: ex: et ts=2 :
870