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 1.8.2.2 2022/05/27 18:10:44 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($ENV{'QUERY_STRING'},['ttoken']);
71: if ($env{'request.course.id'} eq $cdom.'_'.$cnum) {
72: # Check for ttoken
73: my $newlauncher = &launch_check($r->uri,$symb);
74: my ($map,$resid,$url) = &Apache::lonnet::decode_symb($symb);
75: if (&Apache::lonnet::is_on_map($url)) {
76: my $realuri;
77: if ((&Apache::lonnet::EXT('resource.0.hiddenresource',$symb) =~ /^yes$/i) &&
78: (!$env{'request.role.adv'})) {
79: $env{'user.error.msg'}=$r->uri.':bre:1:1:Access to resource denied';
80: return HTTP_NOT_ACCEPTABLE;
81: }
82: if ((&Apache::lonnet::EXT('resource.0.encrypturl',$symb) =~ /^yes$/i) &&
83: (!$env{'request.role.adv'})) {
84: $realuri = &Apache::lonenc::encrypted(&Apache::lonnet::clutter($url));
85: if (($url =~ /\.sequence$/) &&
86: ($env{'course.'.$env{'request.course.id'}.'.type'} ne 'Placement')) {
87: $realuri .= '?navmap=1';
88: } else {
89: $realuri .= '?symb='.&Apache::lonenc::encrypted($symb);
90: }
91: } else {
92: $realuri = &Apache::lonnet::clutter($url);
93: if (($url =~ /\.sequence$/) &&
94: ($env{'course.'.$env{'request.course.id'}.'.type'} ne 'Placement')) {
95: $realuri .= '?navmap=1';
96: } else {
97: $realuri .= '?symb='.$symb;
98: }
99: }
100: my $update;
101: # Check if course needs to be re-initialized
102: if ($newlauncher) {
103: $update = 1;
104: } else {
105: my $loncaparev = $r->dir_config('lonVersion');
106: my ($result,@reinit) = &Apache::loncommon::needs_coursereinit($loncaparev);
107: if ($result eq 'update') {
108: $update = 1;
109: } elsif (!-e $env{'request.course.fn'}.'.db') {
110: $update = 1;
111: } elsif (!$env{'request.role.adv'}) {
112: my $navmap = Apache::lonnavmaps::navmap->new();
113: if (ref($navmap)) {
114: my $res = $navmap->getBySymb($symb);
115: if (ref($res)) {
116: my ($enc_in_bighash,$enc_in_parm);
117: $enc_in_bighash = $res->encrypted();
118: if (&Apache::lonnet::EXT('resource.0.encrypturl',$symb) =~ /^yes$/i) {
119: $enc_in_parm = 1;
120: }
121: if ($enc_in_bighash ne $enc_in_parm) {
122: $update = 1;
123: }
124: }
125: }
126: }
127: }
128: if ($update) {
129: my ($furl,$ferr)=
130: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
131: if ($ferr) {
132: $env{'user.error.msg'}=$r->uri.':bre:0:0:Course not initialized';
133: $env{'user.reinit'} = 1;
134: return HTTP_NOT_ACCEPTABLE;
135: }
136: }
137: my $host = $r->headers_in->get('Host');
138: if (!$host) {
139: $r->internal_redirect($realuri);
140: return OK;
141: } else {
142: my $protocol = 'http';
143: if ($r->get_server_port == 443) {
144: $protocol = 'https';
145: }
146: my $location = $protocol.'://'.$host.$realuri;
147: $r->headers_out->set(Location => $location);
148: return REDIRECT;
149: }
150: }
151: } else {
152: my %crsenv = &Apache::lonnet::coursedescription("$cdom/$cnum");
153: my @possroles = ('in','ta','ep','st','cr','ad');
154: if ($crsenv{'type'} eq 'Community') {
155: unshift(@possroles,'co');
156: } else {
157: unshift(@possroles,'cc');
158: }
159: my %roleshash = &Apache::lonnet::get_my_roles($env{'user.uname'},
160: $env{'user.domain'},
161: 'userroles',undef,
162: \@possroles,[$cdom],1);
163: my (%possroles,$hassection);
164: if (keys(%roleshash)) {
165: foreach my $entry (keys(%roleshash)) {
166: if ($entry =~ /^\Q$cnum:$cdom:\E([^:]+):([^:]*)$/) {
167: $possroles{$1} = $2;
168: if ($2 ne '') {
169: $hassection = 1;
170: }
171: }
172: }
173: }
174: my @allposs = keys(%possroles);
175: if (@allposs == 0) {
176: &show_roles($r,\%crsenv,\%possroles);
177: } elsif (@allposs == 1) {
178: my $newrole = "$allposs[0]./$cdom/$cnum";
179: $newrole = "$allposs[0]./$cdom/$cnum";
180: if ($possroles{$allposs[0]} ne '') {
181: $newrole .= "/$possroles{$allposs[0]}";
182: }
183: my $destination .= '/adm/roles?selectrole=1&'.$newrole.'=1'.
184: '&destinationurl='.&HTML::Entities::encode($r->uri);
185: if ($env{'form.ttoken'}) {
186: $destination .= '&ttoken='.$env{'form.ttoken'};
187: }
188: &do_redirect($r,$destination);
189: } elsif (keys(%possroles) > 1) {
190: if (grep(/^(cc|co)$/,@allposs)) {
191: my $newrole;
192: if (exists($possroles{'cc'})) {
193: $newrole = 'cc';
194: } else {
195: $newrole = 'co';
196: }
197: $newrole .= "./$cdom/$cnum";
198: my $destination .= '/adm/roles?selectrole=1&'.$newrole.'=1'.
199: '&destinationurl='.&HTML::Entities::encode($r->uri);
200: if ($env{'form.ttoken'}) {
201: $destination .= '&ttoken='.$env{'form.ttoken'};
202: }
203: &do_redirect($r,$destination);
204: } else {
205: my $hascustom;
206: if (grep(/^cr\//,@allposs)) {
207: $hascustom = 1;
208: }
209: &show_roles($r,\%crsenv,\%possroles,$hassection,$hascustom);
210: }
211: }
212: return OK;
213: }
214: }
215: }
216: }
217: }
218: }
219: &generic_error($r);
220: return OK;
221: } else {
222: return FORBIDDEN;
223: }
224: }
225:
226: sub launch_check {
227: my ($linkuri,$symb) = @_;
228: my ($linkprotector,$linkproturi,$linkkey,$newlauncher);
229: if ($env{'form.ttoken'}) {
230: my %link_info = &Apache::lonnet::tmpget($env{'form.ttoken'});
231: &Apache::lonnet::tmpdel($env{'form.ttoken'});
232: delete($env{'form.ttoken'});
233: if ($link_info{'ltoken'}) {
234: unless (($link_info{'linkprot'}) || ($link_info{'linkkey'} ne '')) {
235: my %ltoken_info = &Apache::lonnet::tmpget($link_info{'ltoken'});
236: if ($ltoken_info{'linkprot'}) {
237: $link_info{'linkprot'} = $ltoken_info{'linkprot'};
238: } elsif ($ltoken_info{'linkkey'} ne '') {
239: $link_info{'linkkey'} = $ltoken_info{'linkkey'};
240: }
241: }
242: &Apache::lonnet::tmpdel($env{'form.ltoken'});
243: delete($env{'form.ltoken'});
244: }
245: if ($link_info{'linkprot'}) {
246: ($linkprotector,$linkproturi) = split(/:/,$link_info{'linkprot'},2);
247: if ($env{'user.linkprotector'}) {
248: my @protectors = split(/,/,$env{'user.linkprotector'});
249: unless (grep(/^\Q$linkprotector\E$/,@protectors)) {
250: push(@protectors,$linkprotector);
251: @protectors = sort { $a <=> $b } @protectors;
252: &Apache::lonnet::appenv({'user.linkprotector' => join(',',@protectors)});
253: }
254: } else {
255: &Apache::lonnet::appenv({'user.linkprotector' => $linkprotector });
256: }
257: if ($env{'user.linkproturi'}) {
258: my @proturis = split(/,/,$env{'user.linkproturi'});
259: unless(grep(/^\Q$linkproturi\E$/,@proturis)) {
260: push(@proturis,$linkproturi);
261: @proturis = sort(@proturis);
262: &Apache::lonnet::appenv({'user.linkproturi' => join(',',@proturis)});
263: }
264: } else {
265: &Apache::lonnet::appenv({'user.linkproturi' => $linkproturi});
266: }
267: } elsif ($link_info{'linkkey'} ne '') {
268: $linkkey = $link_info{'linkkey'};
269: my $keyedlinkuri = $linkuri;
270: if ($env{'user.deeplinkkey'} ne '') {
271: my @linkkeys = split(/,/,$env{'user.deeplinkkey'});
272: unless (grep(/^\Q$linkkey\E$/,@linkkeys)) {
273: push(@linkkeys,$linkkey);
274: &Apache::lonnet::appenv({'user.deeplinkkey' => join(',',sort(@linkkeys))});
275: }
276: } else {
277: &Apache::lonnet::appenv({'user.deeplinkkey' => $linkkey});
278: }
279: if ($env{'user.keyedlinkuri'}) {
280: my @keyeduris = split(/,/,$env{'user.keyedlinkuri'});
281: unless (grep(/^\Q$keyedlinkuri\E$/,@keyeduris)) {
282: push(@keyeduris,$keyedlinkuri);
283: &Apache::lonnet::appenv({'user.keyedlinkuri' => join(',',sort(@keyeduris))});
284: }
285: } else {
286: &Apache::lonnet::appenv({'user.keyedlinkuri' => $keyedlinkuri});
287: }
288: }
289: if ($link_info{'checklaunch'}) {
290: $newlauncher = 1;
291: }
292: }
293: my $currdeeplinklogin = $env{'request.deeplink.login'};
294: my $deeplink;
295: if ($symb =~ /\.(page|sequence)$/) {
296: my $mapname = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($symb))[2]);
297: my $navmap = Apache::lonnavmaps::navmap->new();
298: if (ref($navmap)) {
299: $deeplink = $navmap->get_mapparam(undef,$mapname,'0.deeplink');
300: }
301: } else {
302: $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$symb);
303: }
304: if ($deeplink ne '') {
305: my $disallow;
306: my ($state,$others,$listed,$scope,$protect,$display,$target) = split(/,/,$deeplink);
307: if (($protect ne 'none') && ($protect ne '')) {
308: my ($acctype,$item) = split(/:/,$protect);
309: if ($acctype =~ /lti(c|d)$/) {
310: my $ltitype = $1;
311: if ($linkprotector) {
312: unless ($linkprotector.':'.$linkproturi eq $item.$ltitype.':'.$linkuri) {
313: $disallow = 1;
314: }
315: } else {
316: $disallow = 1;
317: }
318: } elsif ($acctype eq 'key') {
319: if ($linkkey ne '') {
320: unless ($linkkey eq $item) {
321: $disallow = 1;
322: }
323: } else {
324: $disallow = 1;
325: }
326: }
327: }
328: if ($disallow) {
329: if ($currdeeplinklogin eq $linkuri) {
330: &Apache::lonnet::delenv('request.deeplink.login');
331: if ($env{'request.deeplink.target'} ne '') {
332: &Apache::lonnet::delenv('request.deeplink.target');
333: }
334: }
335: } else {
336: unless ($currdeeplinklogin eq $linkuri) {
337: if (($linkprotector) || ($linkkey ne '')) {
338: if ($linkprotector) {
339: &Apache::lonnet::appenv({'request.linkprot' => $linkprotector.':'.$linkproturi});
340: } elsif ($env{'request.linkprot'}) {
341: &Apache::lonnet::delenv({'request.linkprot'});
342: }
343: if ($linkkey ne '') {
344: &Apache::lonnet::appenv({'request.linkkey' => $linkkey});
345: } elsif ($env{'request.linkkey'} ne '') {
346: &Apache::lonnet::delenv({'request.linkkey'});
347: }
348: $newlauncher = 1;
349: }
350: }
351: &Apache::lonnet::appenv({'request.deeplink.login' => $linkuri});
352: if ($target ne '') {
353: &Apache::lonnet::appenv({'request.deeplink.target' => $target});
354: } elsif ($env{'request.deeplink.target'} ne '') {
355: &Apache::lonnet::delenv('request.deeplink.target');
356: }
357: }
358: } else {
359: if ($linkprotector) {
360: &Apache::lonnet::appenv({'request.linkprot' => $linkprotector.':'.$linkproturi});
361: } elsif ($env{'request.linkprot'}) {
362: &Apache::lonnet::delenv({'request.linkprot'});
363: }
364: if ($linkkey ne '') {
365: &Apache::lonnet::appenv({'request.linkkey' => $linkkey});
366: } else {
367: &Apache::lonnet::delenv({'request.linkkey'});
368: }
369: &Apache::lonnet::appenv({'request.deeplink.login' => $linkuri});
370: if ($env{'request.deeplink.target'} ne '') {
371: &Apache::lonnet::delenv('request.deeplink.target');
372: }
373: }
374: return $newlauncher;
375: }
376:
377: sub do_redirect {
378: my ($r,$destination) = @_;
379: my $windowname = 'loncapaclient';
380: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
381: my $args = {'bread_crumbs' => [{'href' => '','text' => 'Role initialization'},],};
382: &Apache::loncommon::content_type($r,'text/html');
383: $r->send_http_header;
384: $r->print(&Apache::loncommon::start_page('Valid link',$header,$args).
385: &Apache::lonhtmlcommon::scripttag('self.name="'.$windowname.'";').
386: '<h1>'.&mt('Welcome').'</h1>'.
387: '<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>'.
388: '<a href="'.$destination.'">'.&mt('Continue').'</a></p>'.
389: &Apache::loncommon::end_page());
390: return;
391: }
392:
393: sub show_roles {
394: my ($r,$crsenv,$possroles,$hassection,$hascustom) = @_;
395: &Apache::loncommon::content_type($r,'text/html');
396: $r->send_http_header;
397: my ($crsdesc,$crstype,$cdom,$cnum,$header,$title,$preamble,$datatable,$js,$args);
398: if (ref($crsenv) eq 'HASH') {
399: $crsdesc = $crsenv->{'description'};
400: $crstype = $crsenv->{'type'};
401: $cdom = $crsenv->{'domain'};
402: $cnum = $crsenv->{'num'};
403: }
404: if ($crstype eq '') {
405: $crstype = 'Course';
406: }
407: my $lc_crstype = lc($crstype);
408: if ($crsdesc ne '') {
409: $header = &mt("The page you requested belongs to the following $lc_crstype: [_1]",
410: '<i>'.$crsdesc.'</i>');
411: }
412: if (ref($possroles) eq 'HASH') {
413: if (keys(%{$possroles}) > 0) {
414: $args = {'bread_crumbs' => [{'href' => '','text' => "Choose role in $lc_crstype"},],};
415: $title = 'Choose a role'; #Do not localize.
416: if ($crstype eq 'Community') {
417: $preamble = &mt('You have the following active roles in this community:');
418: } else {
419: $preamble = &mt('You have the following active roles in this course:');
420: }
421: $datatable = '<form name="" action="/adm/roles">'.
422: '<input type="hidden" name="newrole" value="" />'."\n".
423: '<input type="hidden" name="selectrole" value="1" />'."\n".
424: '<input type="hidden" name="destinationurl" value="'.$r->uri.'" />'."\n";
425: if ($env{'form.ttoken'}) {
426: $datatable .= '<input type="hidden" name="ttoken" value="'.$env{'form.ttoken'}.'" />'."\n";
427: }
428: $datatable .= &Apache::loncommon::start_data_table().
429: &Apache::loncommon::start_data_table_header_row().
430: '<th></th><th>'.&mt('User role').'</th>';
431: if ($hassection) {
432: $datatable .= '<th>'.&mt('Section').'</th>';
433: }
434: if ($hascustom) {
435: $datatable .= '<th>'.&mt('Information').'</th>';
436: }
437: $datatable .= &Apache::loncommon::end_data_table_header_row();
438: my @available = sort(keys(%{$possroles}));
439: foreach my $role ('ad','in','ta','ep','st','cr') {
440: foreach my $key (@available) {
441: if ($key =~ m{^$role($|/)}) {
442: my $trolecode = "$key./$cdom/$cnum";
443: my $rolename = &Apache::lonnet::plaintext($key,$crstype,$cdom.'_'.$cnum);
444: my $sec = $possroles->{$key};
445: if ($sec ne '') {
446: $trolecode .= '/'.$sec;
447: }
448: my $buttonname=$trolecode;
449: $buttonname=~s/\W//g;
450: $datatable .= &Apache::loncommon::start_data_table_row().
451: '<td><input name="'.$buttonname.'" type="button" value="'.
452: &mt('Select').'" onclick="javascript:enterrole(this.form,'.
453: "'$trolecode','$buttonname'".');" /></td>';
454: if ($key =~ /^cr\//) {
455: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$key);
456: $datatable .= '<td><span class="LC_nobreak">'.$rolename.'</span></td>';
457: if ($hassection) {
458: $datatable .= '<td>'.$sec.'</td>';
459: }
460: $datatable.= '<td><span class="LC_fontsize_small LC_cusr_emph">'.
461: &mt('Custom role defined by [_1]',$rauthor.':'.$rdomain).
462: '</td>';
463: } else {
464: if ($hassection) {
465: $datatable .= '<td>'.$rolename.'</td>';
466: if ($hascustom) {
467: $datatable .= '<td colspan="2">'.$sec.'</td>';
468: } else {
469: $datatable .= '<td>'.$sec.'</td>';
470: }
471: } elsif ($hascustom) {
472: $datatable .= '<td colspan="2">'.$rolename.'</td>';
473: } else {
474: $datatable .= '<td>'.$rolename.'</td>';
475: }
476: }
477: $datatable .= &Apache::loncommon::end_data_table_row();
478: }
479: }
480: }
481: $datatable .= &Apache::loncommon::end_data_table().
482: '</form>';
483: my $standby = &mt('Role selected. Please stand by.');
484: $js = <<"ENDJS";
485: <script type="text/javascript">
486: // <![CDATA[
487:
488: active=true;
489:
490: function enterrole (thisform,rolecode,buttonname) {
491: if (active) {
492: active=false;
493: document.title='$standby';
494: window.status='$standby';
495: thisform.newrole.value=rolecode;
496: thisform.submit();
497: } else {
498: alert('$standby');
499: }
500: }
501:
502: // ]]>
503: </script>
504: ENDJS
505: } else {
506: $title = 'No active role';
507: $preamble = &mt("You have no active roles in this $lc_crstype so the page is currently unavailable to you.");
508: $args = {'bread_crumbs' => [{'href' => '','text' => 'Role status'},],};
509: }
510: }
511: &Apache::loncommon::content_type($r,'text/html');
512: $r->send_http_header;
513: $r->print(&Apache::loncommon::start_page($title,$js,$args).
514: '<h3>'.$header.'</h3>'.
515: '<div>'.$preamble.'</div>'.
516: $datatable.
517: &Apache::loncommon::end_page());
518: return;
519: }
520:
521: sub generic_error {
522: my ($r) = @_;
523: my $continuelink;
524: my $linktext;
525: if ($env{'user.adv'}) {
526: $linktext = &mt('Continue to your roles page');
527: } else {
528: $linktext = &mt('Continue to your courses page');
529: }
530: $continuelink='<a href="/adm/roles">'.$linktext.'</a>';
531: my $msg = &mt('The page you requested does not exist.');
532: &Apache::loncommon::content_type($r,'text/html');
533: $r->send_http_header;
534: my $args = {'bread_crumbs' => [{'href' => '','text' => 'Link status'},],};
535: $r->print(&Apache::loncommon::start_page('Invalid URL',undef,$args).
536: '<div class="LC_error">'.$msg.'</div>'.
537: '<p>'.$continuelink.'</p>'.
538: &Apache::loncommon::end_page());
539: return;
540: }
541:
542: 1;
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