File:
[LON-CAPA] /
loncom /
interface /
lontiny.pm
Revision
1.11:
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Sun Jun 26 04:03:48 2022 UTC (2 years ago) by
raeburn
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MAIN
CVS tags:
HEAD
- Bug 6907
- Set request.linkprotuser in %env for students accessing deep-linked items
with LTI link protection which includes username from other LMS.
- Set "only_body" for intermediate pages shown while session is being set up
for LTI link-protected access.
- Provide appropriate feedback when a deep link is followed but the user
only has a future and/or expired role in the target course.
1: # The LearningOnline Network with CAPA
2: # Extract domain, courseID, and symb from a shortened URL,
3: # and switch role to a role in designated course.
4: #
5: # $Id: lontiny.pm,v 1.11 2022/06/26 04:03:48 raeburn Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
16: # LON-CAPA is distributed in the hope that it will be useful,
17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29:
30: package Apache::lontiny;
31:
32: use strict;
33: use Apache::Constants qw(:common :http);
34: use Apache::lonnet;
35: use Apache::loncommon;
36: use Apache::lonhtmlcommon;
37: use Apache::lonroles;
38: use Apache::lonuserstate;
39: use Apache::lonnavmaps;
40: use Apache::lonlocal;
41: use LONCAPA qw(:DEFAULT :match);
42:
43: sub handler {
44: my $r = shift;
45: my %user;
46: my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
47: if ($handle ne '') {
48: my $lonidsdir=$r->dir_config('lonIDsDir');
49: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
50: if ($r->uri =~ m{^/tiny/($match_domain)/(\w+)$}) {
51: my ($cdom,$key) = ($1,$2);
52: if (&Apache::lonnet::domain($cdom) ne '') {
53: my $configuname = &Apache::lonnet::get_domainconfiguser($cdom);
54: my $tinyurl;
55: my ($result,$cached)=&Apache::lonnet::is_cached_new('tiny',$cdom."\0".$key);
56: if (defined($cached)) {
57: $tinyurl = $result;
58: } else {
59: my %currtiny = &Apache::lonnet::get('tiny',[$key],$cdom,$configuname);
60: if ($currtiny{$key} ne '') {
61: $tinyurl = $currtiny{$key};
62: &Apache::lonnet::do_cache_new('tiny',$cdom."\0".$key,$currtiny{$key},600);
63: }
64: }
65: if ($tinyurl) {
66: my ($cnum,$symb) = split(/\&/,$tinyurl);
67: if ($cnum =~ /^$match_courseid$/) {
68: my $chome = &Apache::lonnet::homeserver($cnum,$cdom);
69: if ($chome ne 'no_host') {
70: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['ttoken']);
71: my ($linkprot,$linkprotuser,$ltoken);
72: if ($env{'form.ttoken'}) {
73: my %link_info = &Apache::lonnet::tmpget($env{'form.ttoken'});
74: if ($link_info{'origurl'} eq $r->uri) {
75: if ($link_info{'ltoken'}) {
76: $ltoken = $link_info{'ltoken'};
77: my %ltoken_info = &Apache::lonnet::tmpget($link_info{'ltoken'});
78: $linkprot = $ltoken_info{'linkprot'};
79: $linkprotuser = $ltoken_info{'linkprotuser'};
80: } elsif ($link_info{'linkprot'}) {
81: $linkprot = $link_info{'linkprot'};
82: if ($link_info{'linkprotuser'}) {
83: $linkprotuser = $link_info{'linkprotuser'};
84: }
85: }
86: }
87: }
88: if ($env{'request.course.id'} eq $cdom.'_'.$cnum) {
89: # Check for ttoken
90: my $newlauncher = &launch_check($r->uri,$symb);
91: my ($map,$resid,$url) = &Apache::lonnet::decode_symb($symb);
92: if (&Apache::lonnet::is_on_map($url)) {
93: my $realuri;
94: if ((&Apache::lonnet::EXT('resource.0.hiddenresource',$symb) =~ /^yes$/i) &&
95: (!$env{'request.role.adv'})) {
96: $env{'user.error.msg'}=$r->uri.':bre:1:1:Access to resource denied';
97: return HTTP_NOT_ACCEPTABLE;
98: }
99: if ((&Apache::lonnet::EXT('resource.0.encrypturl',$symb) =~ /^yes$/i) &&
100: (!$env{'request.role.adv'})) {
101: $realuri = &Apache::lonenc::encrypted(&Apache::lonnet::clutter($url));
102: if (($url =~ /\.sequence$/) &&
103: ($env{'course.'.$env{'request.course.id'}.'.type'} ne 'Placement')) {
104: $realuri .= '?navmap=1';
105: } else {
106: $realuri .= '?symb='.&Apache::lonenc::encrypted($symb);
107: }
108: } else {
109: $realuri = &Apache::lonnet::clutter($url);
110: if (($url =~ /\.sequence$/) &&
111: ($env{'course.'.$env{'request.course.id'}.'.type'} ne 'Placement')) {
112: $realuri .= '?navmap=1';
113: } else {
114: $realuri .= '?symb='.$symb;
115: }
116: }
117: my $update;
118: # Check if course needs to be re-initialized
119: if ($newlauncher) {
120: $update = 1;
121: } else {
122: my $loncaparev = $r->dir_config('lonVersion');
123: my ($result,@reinit) = &Apache::loncommon::needs_coursereinit($loncaparev);
124: if ($result eq 'update') {
125: $update = 1;
126: } elsif (!-e $env{'request.course.fn'}.'.db') {
127: $update = 1;
128: } elsif (!$env{'request.role.adv'}) {
129: my $navmap = Apache::lonnavmaps::navmap->new();
130: if (ref($navmap)) {
131: my $res = $navmap->getBySymb($symb);
132: if (ref($res)) {
133: my ($enc_in_bighash,$enc_in_parm);
134: $enc_in_bighash = $res->encrypted();
135: if (&Apache::lonnet::EXT('resource.0.encrypturl',$symb) =~ /^yes$/i) {
136: $enc_in_parm = 1;
137: }
138: if ($enc_in_bighash ne $enc_in_parm) {
139: $update = 1;
140: }
141: }
142: }
143: }
144: }
145: if ($update) {
146: my ($furl,$ferr)=
147: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
148: if ($ferr) {
149: $env{'user.error.msg'}=$r->uri.':bre:0:0:Course not initialized';
150: $env{'user.reinit'} = 1;
151: return HTTP_NOT_ACCEPTABLE;
152: }
153: }
154: my $host = $r->headers_in->get('Host');
155: if (!$host) {
156: $r->internal_redirect($realuri);
157: return OK;
158: } else {
159: my $protocol = 'http';
160: if ($r->get_server_port == 443) {
161: $protocol = 'https';
162: }
163: my $location = $protocol.'://'.$host.$realuri;
164: $r->headers_out->set(Location => $location);
165: return REDIRECT;
166: }
167: }
168: } else {
169: my %crsenv = &Apache::lonnet::coursedescription("$cdom/$cnum");
170: my @possroles = ('in','ta','ep','st','cr','ad');
171: if ($crsenv{'type'} eq 'Community') {
172: unshift(@possroles,'co');
173: } else {
174: unshift(@possroles,'cc');
175: }
176: my %roleshash =
177: &Apache::lonnet::get_my_roles($env{'user.uname'},$env{'user.domain'},
178: 'userroles',['previous','active','future'],
179: \@possroles,[$cdom],1);
180: my (%possroles,$hassection,%active,%expired,%future);
181: if (keys(%roleshash)) {
182: my $now = time;
183: foreach my $entry (keys(%roleshash)) {
184: if ($entry =~ /^\Q$cnum:$cdom:\E([^:]+):([^:]*)$/) {
185: my ($role,$sec) = ($1,$2);
186: $possroles{$role} = $sec;
187: if ($sec ne '') {
188: $hassection = 1;
189: }
190: my ($tstart,$tend)=split(/\:/,$roleshash{$entry});
191: my $status = 'active';
192: if (($tend) && ($tend<=$now)) {
193: $status = 'previous';
194: }
195: if (($tstart) && ($now<$tstart)) {
196: $status = 'future';
197: }
198: if ($status eq 'active') {
199: $active{$role} = $sec;
200: } elsif ($status eq 'previous') {
201: $expired{$tend} = $role.':'.$sec;
202: } elsif ($status eq 'future') {
203: $future{$tstart} = $role.':'.$sec;
204: }
205: }
206: }
207: }
208: my @allposs = keys(%active);
209: if ($env{'request.lti.login'}) {
210: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
211: if ($env{'request.lti.target'} eq '') {
212: if ($env{'form.ltitarget'} eq 'iframe') {
213: &Apache::lonnet::appenv({'request.lti.target' => 'iframe'});
214: delete($env{'form.ltitarget'});
215: }
216: }
217: if ($env{'form.selectrole'}) {
218: foreach my $role (@allposs) {
219: my $newrole = "$role./$cdom/$cnum";
220: if ($possroles{$allposs[0]} ne '') {
221: $newrole .= "/$possroles{$role}";
222: }
223: if ($env{"form.$newrole"}) {
224: my $destination .= '/adm/roles?selectrole=1&'.$newrole.'=1'.
225: '&destinationurl='.&HTML::Entities::encode($r->uri,'&<>"');
226: if ($env{'form.ltitarget'} eq 'iframe') {
227: $destination .= '<itarget=iframe';
228: }
229: &do_redirect($r,$destination);
230: return OK;
231: }
232: }
233: }
234: }
235: if (@allposs == 0) {
236: &show_roles($r,\%crsenv,\%active,'','',\%future,\%expired,$linkprot,$linkprotuser,$ltoken);
237: } elsif (@allposs == 1) {
238: my $newrole = "$allposs[0]./$cdom/$cnum";
239: $newrole = "$allposs[0]./$cdom/$cnum";
240: if ($possroles{$allposs[0]} ne '') {
241: $newrole .= "/$possroles{$allposs[0]}";
242: }
243: my $destination .= '/adm/roles?selectrole=1&'.$newrole.'=1'.
244: '&destinationurl='.&HTML::Entities::encode($r->uri,'&<>"');
245: if ($env{'form.ttoken'}) {
246: $destination .= '&ttoken='.$env{'form.ttoken'};
247: }
248: &do_redirect($r,$destination,$linkprot);
249: } elsif (keys(%possroles) > 1) {
250: if (grep(/^(cc|co)$/,@allposs)) {
251: my $newrole;
252: if (exists($possroles{'cc'})) {
253: $newrole = 'cc';
254: } else {
255: $newrole = 'co';
256: }
257: $newrole .= "./$cdom/$cnum";
258: my $destination .= '/adm/roles?selectrole=1&'.$newrole.'=1'.
259: '&destinationurl='.&HTML::Entities::encode($r->uri,'&<>"');
260: if ($env{'form.ttoken'}) {
261: $destination .= '&ttoken='.$env{'form.ttoken'};
262: }
263: &do_redirect($r,$destination,$linkprot);
264: } else {
265: my $hascustom;
266: if (grep(/^cr\//,@allposs)) {
267: $hascustom = 1;
268: }
269: &show_roles($r,\%crsenv,\%possroles,$hassection,$hascustom);
270: }
271: }
272: return OK;
273: }
274: }
275: }
276: }
277: }
278: }
279: &generic_error($r);
280: return OK;
281: } else {
282: return FORBIDDEN;
283: }
284: }
285:
286: sub launch_check {
287: my ($linkuri,$symb) = @_;
288: my ($linkprotector,$linkproturi,$linkkey,$newlauncher);
289: if ($env{'form.ttoken'}) {
290: my %link_info = &Apache::lonnet::tmpget($env{'form.ttoken'});
291: &Apache::lonnet::tmpdel($env{'form.ttoken'});
292: delete($env{'form.ttoken'});
293: if ($link_info{'ltoken'}) {
294: unless (($link_info{'linkprot'}) || ($link_info{'linkkey'} ne '')) {
295: my %ltoken_info = &Apache::lonnet::tmpget($link_info{'ltoken'});
296: if ($ltoken_info{'linkprot'}) {
297: $link_info{'linkprot'} = $ltoken_info{'linkprot'};
298: } elsif ($ltoken_info{'linkkey'} ne '') {
299: $link_info{'linkkey'} = $ltoken_info{'linkkey'};
300: }
301: }
302: &Apache::lonnet::tmpdel($link_info{'ltoken'});
303: }
304: if ($link_info{'linkprot'}) {
305: ($linkprotector,$linkproturi) = split(/:/,$link_info{'linkprot'},2);
306: if ($env{'user.linkprotector'}) {
307: my @protectors = split(/,/,$env{'user.linkprotector'});
308: unless (grep(/^\Q$linkprotector\E$/,@protectors)) {
309: push(@protectors,$linkprotector);
310: @protectors = sort { $a <=> $b } @protectors;
311: &Apache::lonnet::appenv({'user.linkprotector' => join(',',@protectors)});
312: }
313: } else {
314: &Apache::lonnet::appenv({'user.linkprotector' => $linkprotector });
315: }
316: if ($env{'user.linkproturi'}) {
317: my @proturis = split(/,/,$env{'user.linkproturi'});
318: unless(grep(/^\Q$linkproturi\E$/,@proturis)) {
319: push(@proturis,$linkproturi);
320: @proturis = sort(@proturis);
321: &Apache::lonnet::appenv({'user.linkproturi' => join(',',@proturis)});
322: }
323: } else {
324: &Apache::lonnet::appenv({'user.linkproturi' => $linkproturi});
325: }
326: } elsif ($link_info{'linkkey'} ne '') {
327: $linkkey = $link_info{'linkkey'};
328: my $keyedlinkuri = $linkuri;
329: if ($env{'user.deeplinkkey'} ne '') {
330: my @linkkeys = split(/,/,$env{'user.deeplinkkey'});
331: unless (grep(/^\Q$linkkey\E$/,@linkkeys)) {
332: push(@linkkeys,$linkkey);
333: &Apache::lonnet::appenv({'user.deeplinkkey' => join(',',sort(@linkkeys))});
334: }
335: } else {
336: &Apache::lonnet::appenv({'user.deeplinkkey' => $linkkey});
337: }
338: if ($env{'user.keyedlinkuri'}) {
339: my @keyeduris = split(/,/,$env{'user.keyedlinkuri'});
340: unless (grep(/^\Q$keyedlinkuri\E$/,@keyeduris)) {
341: push(@keyeduris,$keyedlinkuri);
342: &Apache::lonnet::appenv({'user.keyedlinkuri' => join(',',sort(@keyeduris))});
343: }
344: } else {
345: &Apache::lonnet::appenv({'user.keyedlinkuri' => $keyedlinkuri});
346: }
347: }
348: if ($link_info{'checklaunch'}) {
349: $newlauncher = 1;
350: }
351: }
352: my $currdeeplinklogin = $env{'request.deeplink.login'};
353: my $deeplink;
354: if ($symb =~ /\.(page|sequence)$/) {
355: my $mapname = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($symb))[2]);
356: my $navmap = Apache::lonnavmaps::navmap->new();
357: if (ref($navmap)) {
358: $deeplink = $navmap->get_mapparam(undef,$mapname,'0.deeplink');
359: }
360: } else {
361: $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$symb);
362: }
363: if ($deeplink ne '') {
364: my $disallow;
365: my ($state,$others,$listed,$scope,$protect,$display,$target) = split(/,/,$deeplink);
366: if (($protect ne 'none') && ($protect ne '')) {
367: my ($acctype,$item) = split(/:/,$protect);
368: if ($acctype =~ /lti(c|d)$/) {
369: my $ltitype = $1;
370: if ($linkprotector) {
371: unless ($linkprotector.':'.$linkproturi eq $item.$ltitype.':'.$linkuri) {
372: $disallow = 1;
373: }
374: } else {
375: $disallow = 1;
376: }
377: } elsif ($acctype eq 'key') {
378: if ($linkkey ne '') {
379: unless ($linkkey eq $item) {
380: $disallow = 1;
381: }
382: } else {
383: $disallow = 1;
384: }
385: }
386: }
387: if ($disallow) {
388: if ($currdeeplinklogin eq $linkuri) {
389: &Apache::lonnet::delenv('request.deeplink.login');
390: if ($env{'request.deeplink.target'} ne '') {
391: &Apache::lonnet::delenv('request.deeplink.target');
392: }
393: }
394: } else {
395: unless ($currdeeplinklogin eq $linkuri) {
396: if (($linkprotector) || ($linkkey ne '')) {
397: if ($linkprotector) {
398: &Apache::lonnet::appenv({'request.linkprot' => $linkprotector.':'.$linkproturi});
399: } elsif ($env{'request.linkprot'}) {
400: &Apache::lonnet::delenv({'request.linkprot'});
401: }
402: if ($linkkey ne '') {
403: &Apache::lonnet::appenv({'request.linkkey' => $linkkey});
404: } elsif ($env{'request.linkkey'} ne '') {
405: &Apache::lonnet::delenv({'request.linkkey'});
406: }
407: $newlauncher = 1;
408: }
409: }
410: &Apache::lonnet::appenv({'request.deeplink.login' => $linkuri});
411: if ($target ne '') {
412: &Apache::lonnet::appenv({'request.deeplink.target' => $target});
413: } elsif ($env{'request.deeplink.target'} ne '') {
414: &Apache::lonnet::delenv('request.deeplink.target');
415: }
416: }
417: } else {
418: if ($linkprotector) {
419: &Apache::lonnet::appenv({'request.linkprot' => $linkprotector.':'.$linkproturi});
420: } elsif ($env{'request.linkprot'}) {
421: &Apache::lonnet::delenv({'request.linkprot'});
422: }
423: if ($linkkey ne '') {
424: &Apache::lonnet::appenv({'request.linkkey' => $linkkey});
425: } else {
426: &Apache::lonnet::delenv({'request.linkkey'});
427: }
428: &Apache::lonnet::appenv({'request.deeplink.login' => $linkuri});
429: if ($env{'request.deeplink.target'} ne '') {
430: &Apache::lonnet::delenv('request.deeplink.target');
431: }
432: }
433: return $newlauncher;
434: }
435:
436: sub do_redirect {
437: my ($r,$destination,$linkprot) = @_;
438: my $windowname = 'loncapaclient';
439: if ($env{'request.lti.login'}) {
440: $windowname .= 'lti';
441: }
442: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
443: my $args = {'bread_crumbs' => [{'href' => '','text' => 'Role initialization'},],};
444: if ($linkprot) {
445: $args = {'only_body' => 1,
446: 'redirect' => [0,$destination],};
447: }
448: &Apache::loncommon::content_type($r,'text/html');
449: $r->send_http_header;
450: if ($linkprot) {
451: $r->print(&Apache::loncommon::start_page('Valid link','',$args).
452: &Apache::loncommon::end_page());
453: } else {
454: $r->print(&Apache::loncommon::start_page('Valid link',$header,$args).
455: &Apache::lonhtmlcommon::scripttag('self.name="'.$windowname.'";').
456: '<h1>'.&mt('Welcome').'</h1>'.
457: '<p>'.&mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>').'</p><p>'.
458: '<a href="'.$destination.'">'.&mt('Continue').'</a></p>'.
459: &Apache::loncommon::end_page());
460: }
461: return;
462: }
463:
464: sub show_roles {
465: my ($r,$crsenv,$possroles,$hassection,$hascustom,$futureroles,$expiredroles,$linkprot,$linkprotuser,$ltoken) = @_;
466: my ($crsdesc,$crstype,$cdom,$cnum,$header,$title,$preamble,$datatable,$js,$args);
467: if (ref($crsenv) eq 'HASH') {
468: $crsdesc = $crsenv->{'description'};
469: $crstype = $crsenv->{'type'};
470: $cdom = $crsenv->{'domain'};
471: $cnum = $crsenv->{'num'};
472: }
473: if ($crstype eq '') {
474: $crstype = 'Course';
475: }
476: my $lc_crstype = lc($crstype);
477: if ($crsdesc ne '') {
478: $header = &mt("The page you requested belongs to the following $lc_crstype: [_1]",
479: '<i>'.$crsdesc.'</i>');
480: }
481: if (ref($possroles) eq 'HASH') {
482: if (keys(%{$possroles}) > 0) {
483: $args = {'bread_crumbs' => [{'href' => '','text' => "Choose role in $lc_crstype"},],};
484: if ($linkprot) {
485: $args = {'only_body' => 1};
486: }
487: $title = 'Choose a role'; #Do not localize.
488: if ($crstype eq 'Community') {
489: $preamble = &mt('You have the following active roles in this community:');
490: } else {
491: $preamble = &mt('You have the following active roles in this course:');
492: }
493: $datatable = '<form name="" action="/adm/roles">'.
494: '<input type="hidden" name="newrole" value="" />'."\n".
495: '<input type="hidden" name="selectrole" value="1" />'."\n".
496: '<input type="hidden" name="destinationurl" value="'.&HTML::Entities::encode($r->uri,'&<>"').'" />'."\n";
497: if ($env{'form.ttoken'}) {
498: $datatable .= '<input type="hidden" name="ttoken" value="'.$env{'form.ttoken'}.'" />'."\n";
499: }
500: $datatable .= &Apache::loncommon::start_data_table().
501: &Apache::loncommon::start_data_table_header_row().
502: '<th></th><th>'.&mt('User role').'</th>';
503: if ($hassection) {
504: $datatable .= '<th>'.&mt('Section').'</th>';
505: }
506: if ($hascustom) {
507: $datatable .= '<th>'.&mt('Information').'</th>';
508: }
509: $datatable .= &Apache::loncommon::end_data_table_header_row();
510: my @available = sort(keys(%{$possroles}));
511: foreach my $role ('ad','in','ta','ep','st','cr') {
512: foreach my $key (@available) {
513: if ($key =~ m{^$role($|/)}) {
514: my $trolecode = "$key./$cdom/$cnum";
515: my $rolename = &Apache::lonnet::plaintext($key,$crstype,$cdom.'_'.$cnum);
516: my $sec = $possroles->{$key};
517: if ($sec ne '') {
518: $trolecode .= '/'.$sec;
519: }
520: my $buttonname=$trolecode;
521: $buttonname=~s/\W//g;
522: $datatable .= &Apache::loncommon::start_data_table_row().
523: '<td><input name="'.$buttonname.'" type="button" value="'.
524: &mt('Select').'" onclick="javascript:enterrole(this.form,'.
525: "'$trolecode','$buttonname'".');" /></td>';
526: if ($key =~ /^cr\//) {
527: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$key);
528: $datatable .= '<td><span class="LC_nobreak">'.$rolename.'</span></td>';
529: if ($hassection) {
530: $datatable .= '<td>'.$sec.'</td>';
531: }
532: $datatable.= '<td><span class="LC_fontsize_small LC_cusr_emph">'.
533: &mt('Custom role defined by [_1]',$rauthor.':'.$rdomain).
534: '</td>';
535: } else {
536: if ($hassection) {
537: $datatable .= '<td>'.$rolename.'</td>';
538: if ($hascustom) {
539: $datatable .= '<td colspan="2">'.$sec.'</td>';
540: } else {
541: $datatable .= '<td>'.$sec.'</td>';
542: }
543: } elsif ($hascustom) {
544: $datatable .= '<td colspan="2">'.$rolename.'</td>';
545: } else {
546: $datatable .= '<td>'.$rolename.'</td>';
547: }
548: }
549: $datatable .= &Apache::loncommon::end_data_table_row();
550: }
551: }
552: }
553: $datatable .= &Apache::loncommon::end_data_table().
554: '</form>';
555: my $standby = &mt('Role selected. Please stand by.');
556: $js = <<"ENDJS";
557: <script type="text/javascript">
558: // <![CDATA[
559:
560: active=true;
561:
562: function enterrole (thisform,rolecode,buttonname) {
563: if (active) {
564: active=false;
565: document.title='$standby';
566: window.status='$standby';
567: thisform.newrole.value=rolecode;
568: thisform.submit();
569: } else {
570: alert('$standby');
571: }
572: }
573:
574: // ]]>
575: </script>
576: ENDJS
577: } else {
578: if ($linkprot) {
579: $title = 'No access';
580: $preamble = '<p>'.&mt('Access unavailable for this LON-CAPA content.').'</p>';
581: $args->{'only_body'} = 1;
582: } else {
583: $title = 'No active role';
584: $preamble = '<p>'.&mt("You have no active roles in this $lc_crstype so the page is currently unavailable to you.").'</p>';
585: $args = {'bread_crumbs' => [{'href' => '','text' => 'Role status'},],};
586: }
587: $header = &mt('No access for: [_1]','<b>'.&Apache::loncommon::plainname($env{'user.name'},
588: $env{'user.domain'}).'</b>');
589: if ((ref($futureroles) eq 'HASH') && (keys(%{$futureroles}) > 0)) {
590: my @future = sort { $a <=> $b } (keys(%{$futureroles}));
591: $preamble .= '<p>'.&mt('Access will begin: [_1].',&Apache::lonlocal::locallocaltime($future[0])).
592: ' '.&mt('Please try again then.').'</p>';
593: } elsif ((ref($expiredroles) eq 'HASH') && (keys(%{$expiredroles}) > 0)) {
594: my @expired = sort { $b <=> $a } (keys(%{$expiredroles}));
595: $preamble .= '<p>'.&mt('Access ended: [_1].',&Apache::lonlocal::locallocaltime($expired[0])).'</p>';
596: } elsif ($linkprot) {
597: if ($linkprotuser) {
598: my ($uname,$udom) = split(/:/,$linkprotuser,2);
599: $preamble .= '<p>'.&mt('As you followed a link from another system, while logged into that other system with the username: [_1], it is recommended that you contact your instructor.','<i>'.$uname.'</i>').'</p>';
600: } else {
601: my $relogin;
602: my %data = (
603: origurl => $r->uri,
604: linkprot => $linkprot,
605: );
606: my $token =
607: &Apache::lonnet::tmpput(\%data,$r->dir_config('lonHostID'),'retry');
608: unless (($token eq 'con_lost') || ($token eq 'refused') || ($token =~ /^error:/) ||
609: ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
610: $relogin = '/adm/relaunch?rtoken='.$token;
611: }
612: $preamble .= '<p>'.&mt('You might try logging in with a different username and/or domain.').' '.
613: &mt('You are currently logged in as: [_1] in domain: [_2]',
614: '<i>'.$env{'user.name'}.'</i>','<i>'.$env{'user.domain'}.'</i>').'</p>';
615: if ($relogin) {
616: $preamble .= '<p>'.&mt('[_1]Log-in again[_2]','<a href="'.$relogin.'" target="_self">','</a>').'</p>';
617: }
618: }
619: }
620: if ($env{'form.ttoken'}) {
621: &Apache::lonnet::tmpdel($env{'form.ttoken'});
622: }
623: if ($ltoken) {
624: &Apache::lonnet::tmpdel($ltoken);
625: }
626: }
627: }
628: &Apache::loncommon::content_type($r,'text/html');
629: $r->send_http_header;
630: $r->print(&Apache::loncommon::start_page($title,$js,$args).
631: '<h3>'.$header.'</h3>'.
632: '<div>'.$preamble.'</div>'.
633: $datatable.
634: &Apache::loncommon::end_page());
635: return;
636: }
637:
638: sub generic_error {
639: my ($r) = @_;
640: my $continuelink;
641: unless ($env{'request.lti.login'}) {
642: my $linktext;
643: if ($env{'user.adv'}) {
644: $linktext = &mt('Continue to your roles page');
645: } else {
646: $linktext = &mt('Continue to your courses page');
647: }
648: $continuelink='<a href="/adm/roles">'.$linktext.'</a>';
649: }
650: my $msg = &mt('The page you requested does not exist.');
651: &Apache::loncommon::content_type($r,'text/html');
652: $r->send_http_header;
653: my $args = {'bread_crumbs' => [{'href' => '','text' => 'Link status'},],};
654: $r->print(&Apache::loncommon::start_page('Invalid URL',undef,$args).
655: '<div class="LC_error">'.$msg.'</div>'.
656: '<p>'.$continuelink.'</p>'.
657: &Apache::loncommon::end_page());
658: return;
659: }
660:
661: 1;
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