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 1.8.2.1 2022/01/02 17:21:37 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{'linkprot'}) {
234: ($linkprotector,$linkproturi) = split(/:/,$link_info{'linkprot'},2);
235: if ($env{'user.linkprotector'}) {
236: my @protectors = split(/,/,$env{'user.linkprotector'});
237: unless (grep(/^\Q$linkprotector\E$/,@protectors)) {
238: push(@protectors,$linkprotector);
239: @protectors = sort { $a <=> $b } @protectors;
240: &Apache::lonnet::appenv({'user.linkprotector' => join(',',@protectors)});
241: }
242: } else {
243: &Apache::lonnet::appenv({'user.linkprotector' => $linkprotector });
244: }
245: if ($env{'user.linkproturi'}) {
246: my @proturis = split(/,/,$env{'user.linkproturi'});
247: unless(grep(/^\Q$linkproturi\E$/,@proturis)) {
248: push(@proturis,$linkproturi);
249: @proturis = sort(@proturis);
250: &Apache::lonnet::appenv({'user.linkproturi' => join(',',@proturis)});
251: }
252: } else {
253: &Apache::lonnet::appenv({'user.linkproturi' => $linkproturi});
254: }
255: } elsif ($link_info{'linkkey'} ne '') {
256: $linkkey = $link_info{'linkkey'};
257: my $keyedlinkuri = $linkuri;
258: if ($env{'user.deeplinkkey'} ne '') {
259: my @linkkeys = split(/,/,$env{'user.deeplinkkey'});
260: unless (grep(/^\Q$linkkey\E$/,@linkkeys)) {
261: push(@linkkeys,$linkkey);
262: &Apache::lonnet::appenv({'user.deeplinkkey' => join(',',sort(@linkkeys))});
263: }
264: } else {
265: &Apache::lonnet::appenv({'user.deeplinkkey' => $linkkey});
266: }
267: if ($env{'user.keyedlinkuri'}) {
268: my @keyeduris = split(/,/,$env{'user.keyedlinkuri'});
269: unless (grep(/^\Q$keyedlinkuri\E$/,@keyeduris)) {
270: push(@keyeduris,$keyedlinkuri);
271: &Apache::lonnet::appenv({'user.keyedlinkuri' => join(',',sort(@keyeduris))});
272: }
273: } else {
274: &Apache::lonnet::appenv({'user.keyedlinkuri' => $keyedlinkuri});
275: }
276: }
277: if ($link_info{'checklaunch'}) {
278: $newlauncher = 1;
279: }
280: }
281: my $currdeeplinklogin = $env{'request.deeplink.login'};
282: my $deeplink;
283: if ($symb =~ /\.(page|sequence)$/) {
284: my $mapname = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($symb))[2]);
285: my $navmap = Apache::lonnavmaps::navmap->new();
286: if (ref($navmap)) {
287: $deeplink = $navmap->get_mapparam(undef,$mapname,'0.deeplink');
288: }
289: } else {
290: $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$symb);
291: }
292: if ($deeplink ne '') {
293: my $disallow;
294: my ($state,$others,$listed,$scope,$protect) = split(/,/,$deeplink);
295: if (($protect ne 'none') && ($protect ne '')) {
296: my ($acctype,$item) = split(/:/,$protect);
297: if ($acctype =~ /lti(c|d)$/) {
298: my $ltitype = $1;
299: if ($linkprotector) {
300: unless ($linkprotector.':'.$linkproturi eq $item.$ltitype.':'.$linkuri) {
301: $disallow = 1;
302: }
303: } else {
304: $disallow = 1;
305: }
306: } elsif ($acctype eq 'key') {
307: if ($linkkey ne '') {
308: unless ($linkkey eq $item) {
309: $disallow = 1;
310: }
311: } else {
312: $disallow = 1;
313: }
314: }
315: }
316: if ($disallow) {
317: if ($currdeeplinklogin eq $linkuri) {
318: &Apache::lonnet::delenv('request.deeplink.login');
319: }
320: } else {
321: unless ($currdeeplinklogin eq $linkuri) {
322: if (($linkprotector) || ($linkkey ne '')) {
323: if ($linkprotector) {
324: &Apache::lonnet::appenv({'request.linkprot' => $linkprotector.':'.$linkproturi});
325: } elsif ($env{'request.linkprot'}) {
326: &Apache::lonnet::delenv({'request.linkprot'});
327: }
328: if ($linkkey ne '') {
329: &Apache::lonnet::appenv({'request.linkkey' => $linkkey});
330: } elsif ($env{'request.linkkey'} ne '') {
331: &Apache::lonnet::delenv({'request.linkkey'});
332: }
333: $newlauncher = 1;
334: }
335: }
336: &Apache::lonnet::appenv({'request.deeplink.login' => $linkuri});
337: }
338: } else {
339: if ($linkprotector) {
340: &Apache::lonnet::appenv({'request.linkprot' => $linkprotector.':'.$linkproturi});
341: } elsif ($env{'request.linkprot'}) {
342: &Apache::lonnet::delenv({'request.linkprot'});
343: }
344: if ($linkkey ne '') {
345: &Apache::lonnet::appenv({'request.linkkey' => $linkkey});
346: } else {
347: &Apache::lonnet::delenv({'request.linkkey'});
348: }
349: &Apache::lonnet::appenv({'request.deeplink.login' => $linkuri});
350: }
351: return $newlauncher;
352: }
353:
354: sub do_redirect {
355: my ($r,$destination) = @_;
356: my $windowname = 'loncapaclient';
357: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
358: my $args = {'bread_crumbs' => [{'href' => '','text' => 'Role initialization'},],};
359: &Apache::loncommon::content_type($r,'text/html');
360: $r->send_http_header;
361: $r->print(&Apache::loncommon::start_page('Valid link',$header,$args).
362: &Apache::lonhtmlcommon::scripttag('self.name="'.$windowname.'";').
363: '<h1>'.&mt('Welcome').'</h1>'.
364: '<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>'.
365: '<a href="'.$destination.'">'.&mt('Continue').'</a></p>'.
366: &Apache::loncommon::end_page());
367: return;
368: }
369:
370: sub show_roles {
371: my ($r,$crsenv,$possroles,$hassection,$hascustom) = @_;
372: &Apache::loncommon::content_type($r,'text/html');
373: $r->send_http_header;
374: my ($crsdesc,$crstype,$cdom,$cnum,$header,$title,$preamble,$datatable,$js,$args);
375: if (ref($crsenv) eq 'HASH') {
376: $crsdesc = $crsenv->{'description'};
377: $crstype = $crsenv->{'type'};
378: $cdom = $crsenv->{'domain'};
379: $cnum = $crsenv->{'num'};
380: }
381: if ($crstype eq '') {
382: $crstype = 'Course';
383: }
384: my $lc_crstype = lc($crstype);
385: if ($crsdesc ne '') {
386: $header = &mt("The page you requested belongs to the following $lc_crstype: [_1]",
387: '<i>'.$crsdesc.'</i>');
388: }
389: if (ref($possroles) eq 'HASH') {
390: if (keys(%{$possroles}) > 0) {
391: $args = {'bread_crumbs' => [{'href' => '','text' => "Choose role in $lc_crstype"},],};
392: $title = 'Choose a role'; #Do not localize.
393: if ($crstype eq 'Community') {
394: $preamble = &mt('You have the following active roles in this community:');
395: } else {
396: $preamble = &mt('You have the following active roles in this course:');
397: }
398: $datatable = '<form name="" action="/adm/roles">'.
399: '<input type="hidden" name="newrole" value="" />'."\n".
400: '<input type="hidden" name="selectrole" value="1" />'."\n".
401: '<input type="hidden" name="destinationurl" value="'.$r->uri.'" />'."\n";
402: if ($env{'form.ttoken'}) {
403: $datatable .= '<input type="hidden" name="ttoken" value="'.$env{'form.ttoken'}.'" />'."\n";
404: }
405: $datatable .= &Apache::loncommon::start_data_table().
406: &Apache::loncommon::start_data_table_header_row().
407: '<th></th><th>'.&mt('User role').'</th>';
408: if ($hassection) {
409: $datatable .= '<th>'.&mt('Section').'</th>';
410: }
411: if ($hascustom) {
412: $datatable .= '<th>'.&mt('Information').'</th>';
413: }
414: $datatable .= &Apache::loncommon::end_data_table_header_row();
415: my @available = sort(keys(%{$possroles}));
416: foreach my $role ('ad','in','ta','ep','st','cr') {
417: foreach my $key (@available) {
418: if ($key =~ m{^$role($|/)}) {
419: my $trolecode = "$key./$cdom/$cnum";
420: my $rolename = &Apache::lonnet::plaintext($key,$crstype,$cdom.'_'.$cnum);
421: my $sec = $possroles->{$key};
422: if ($sec ne '') {
423: $trolecode .= '/'.$sec;
424: }
425: my $buttonname=$trolecode;
426: $buttonname=~s/\W//g;
427: $datatable .= &Apache::loncommon::start_data_table_row().
428: '<td><input name="'.$buttonname.'" type="button" value="'.
429: &mt('Select').'" onclick="javascript:enterrole(this.form,'.
430: "'$trolecode','$buttonname'".');" /></td>';
431: if ($key =~ /^cr\//) {
432: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$key);
433: $datatable .= '<td><span class="LC_nobreak">'.$rolename.'</span></td>';
434: if ($hassection) {
435: $datatable .= '<td>'.$sec.'</td>';
436: }
437: $datatable.= '<td><span class="LC_fontsize_small LC_cusr_emph">'.
438: &mt('Custom role defined by [_1]',$rauthor.':'.$rdomain).
439: '</td>';
440: } else {
441: if ($hassection) {
442: $datatable .= '<td>'.$rolename.'</td>';
443: if ($hascustom) {
444: $datatable .= '<td colspan="2">'.$sec.'</td>';
445: } else {
446: $datatable .= '<td>'.$sec.'</td>';
447: }
448: } elsif ($hascustom) {
449: $datatable .= '<td colspan="2">'.$rolename.'</td>';
450: } else {
451: $datatable .= '<td>'.$rolename.'</td>';
452: }
453: }
454: $datatable .= &Apache::loncommon::end_data_table_row();
455: }
456: }
457: }
458: $datatable .= &Apache::loncommon::end_data_table().
459: '</form>';
460: my $standby = &mt('Role selected. Please stand by.');
461: $js = <<"ENDJS";
462: <script type="text/javascript">
463: // <![CDATA[
464:
465: active=true;
466:
467: function enterrole (thisform,rolecode,buttonname) {
468: if (active) {
469: active=false;
470: document.title='$standby';
471: window.status='$standby';
472: thisform.newrole.value=rolecode;
473: thisform.submit();
474: } else {
475: alert('$standby');
476: }
477: }
478:
479: // ]]>
480: </script>
481: ENDJS
482: } else {
483: $title = 'No active role';
484: $preamble = &mt("You have no active roles in this $lc_crstype so the page is currently unavailable to you.");
485: $args = {'bread_crumbs' => [{'href' => '','text' => 'Role status'},],};
486: }
487: }
488: &Apache::loncommon::content_type($r,'text/html');
489: $r->send_http_header;
490: $r->print(&Apache::loncommon::start_page($title,$js,$args).
491: '<h3>'.$header.'</h3>'.
492: '<div>'.$preamble.'</div>'.
493: $datatable.
494: &Apache::loncommon::end_page());
495: return;
496: }
497:
498: sub generic_error {
499: my ($r) = @_;
500: my $continuelink;
501: my $linktext;
502: if ($env{'user.adv'}) {
503: $linktext = &mt('Continue to your roles page');
504: } else {
505: $linktext = &mt('Continue to your courses page');
506: }
507: $continuelink='<a href="/adm/roles">'.$linktext.'</a>';
508: my $msg = &mt('The page you requested does not exist.');
509: &Apache::loncommon::content_type($r,'text/html');
510: $r->send_http_header;
511: my $args = {'bread_crumbs' => [{'href' => '','text' => 'Link status'},],};
512: $r->print(&Apache::loncommon::start_page('Invalid URL',undef,$args).
513: '<div class="LC_error">'.$msg.'</div>'.
514: '<p>'.$continuelink.'</p>'.
515: &Apache::loncommon::end_page());
516: return;
517: }
518:
519: 1;
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