File:
[LON-CAPA] /
loncom /
auth /
lonroles.pm
Revision
1.240.2.19:
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Sun Dec 5 16:15:02 2010 UTC (13 years, 6 months ago) by
raeburn
Branches:
GCI_3
- Customization for GCI_3
- Separate call to &gcitest_switcher_js() no longer needed.
- Eliminate breadcrumbs for roles page for faculty.
- Custom message for faculty without pending request for GCI access.
1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.240.2.19 2010/12/05 16:15:02 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: =pod
31:
32: =head1 NAME
33:
34: Apache::lonroles - User Roles Screen
35:
36: =head1 SYNOPSIS
37:
38: Invoked by /etc/httpd/conf/srm.conf:
39:
40: <Location /adm/roles>
41: PerlAccessHandler Apache::lonacc
42: SetHandler perl-script
43: PerlHandler Apache::lonroles
44: ErrorDocument 403 /adm/login
45: ErrorDocument 500 /adm/errorhandler
46: </Location>
47:
48: =head1 OVERVIEW
49:
50: =head2 Choosing Roles
51:
52: C<lonroles> is a handler that allows a user to switch roles in
53: mid-session. LON-CAPA attempts to work with "No Role Specified", the
54: default role that a user has before selecting a role, as widely as
55: possible, but certain handlers for example need specification which
56: course they should act on, etc. Both in this scenario, and when the
57: handler determines via C<lonnet>'s C<&allowed> function that a certain
58: action is not allowed, C<lonroles> is used as error handler. This
59: allows the user to select another role which may have permission to do
60: what they were trying to do. C<lonroles> can also be accessed via the
61: B<CRS> button in the Remote Control.
62:
63: =begin latex
64:
65: \begin{figure}
66: \begin{center}
67: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
68: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
69: \end{center}
70: \end{figure}
71:
72: =end latex
73:
74: =head2 Role Initialization
75:
76: The privileges for a user are established at login time and stored in the session environment. As a consequence, a new role does not become active till the next login. Handlers are able to query for privileges using C<lonnet>'s C<&allowed> function. When a user first logs in, their role is the "common" role, which means that they have the sum of all of their privileges. During a session it might become necessary to choose a particular role, which as a consequence also limits the user to only the privileges in that particular role.
77:
78: =head1 INTRODUCTION
79:
80: This module enables a user to select what role he wishes to
81: operate under (instructor, student, teaching assistant, course
82: coordinator, etc). These roles are pre-established by the actions
83: of upper-level users.
84:
85: This is part of the LearningOnline Network with CAPA project
86: described at http://www.lon-capa.org.
87:
88: =head1 HANDLER SUBROUTINE
89:
90: This routine is called by Apache and mod_perl.
91:
92: =over 4
93:
94: =item *
95:
96: Roles Initialization (yes/no)
97:
98: =item *
99:
100: Get Error Message from Environment
101:
102: =item *
103:
104: Who is this?
105:
106: =item *
107:
108: Generate Page Output
109:
110: =item *
111:
112: Choice or no choice
113:
114: =item *
115:
116: Table
117:
118: =item *
119:
120: Privileges
121:
122: =back
123:
124: =cut
125:
126:
127: package Apache::lonroles;
128:
129: use strict;
130: use Apache::lonnet;
131: use Apache::lonuserstate();
132: use Apache::Constants qw(:common);
133: use Apache::File();
134: use Apache::lonmenu;
135: use Apache::loncommon;
136: use Apache::lonhtmlcommon;
137: use Apache::lonannounce;
138: use Apache::lonlocal;
139: use Apache::lonpageflip();
140: use Apache::lonnavdisplay();
141: use Apache::loncoursequeueadmin;
142: use GDBM_File;
143: use LONCAPA qw(:DEFAULT :match);
144: use HTML::Entities;
145:
146:
147: sub redirect_user {
148: my ($r,$title,$url,$msg,$launch_nav) = @_;
149: $msg = $title if (! defined($msg));
150: &Apache::loncommon::content_type($r,'text/html');
151: &Apache::loncommon::no_cache($r);
152: $r->send_http_header;
153: my $swinfo=&Apache::lonmenu::rawconfig();
154: my $navwindow;
155: if ($launch_nav eq 'on') {
156: $navwindow.=&Apache::lonnavdisplay::launch_win('now',undef,undef,
157: ($url =~ m-^/adm/whatsnew-));
158: } else {
159: $navwindow.=&Apache::lonnavmaps::close();
160: }
161:
162: # Breadcrumbs
163: my $brcrum = [{'href' => $url,
164: 'text' => 'Switching Role'},];
165: my $start_page = &Apache::loncommon::start_page('Switching Role',undef,
166: {'redirect' => [1,$url],
167: 'bread_crumbs' => $brcrum,});
168: &Apache::lonhtmlcommon::clear_breadcrumbs();
169: my $end_page = &Apache::loncommon::end_page();
170:
171: # Note to style police:
172: # This must only replace the spaces, nothing else, or it bombs elsewhere.
173: $url=~s/ /\%20/g;
174: $r->print(<<ENDREDIR);
175: $start_page
176: <script type="text/javascript">
177: // <![CDATA[
178: $swinfo
179: // ]]>
180: </script>
181: $navwindow
182: <p>$msg</p>
183: $end_page
184: ENDREDIR
185: return;
186: }
187:
188: sub error_page {
189: my ($r,$error,$dest)=@_;
190: &Apache::loncommon::content_type($r,'text/html');
191: &Apache::loncommon::no_cache($r);
192: $r->send_http_header;
193: return OK if $r->header_only;
194: # Breadcrumbs
195: my $brcrum = [{'href' => $dest,
196: 'text' => 'Problems during Course Initialization'},];
197: $r->print(&Apache::loncommon::start_page('Problems during Course Initialization',
198: undef,
199: {'bread_crumbs' => $brcrum,})
200: );
201: $r->print(
202: '<script type="text/javascript">'.
203: '// <![CDATA['.
204: &Apache::lonmenu::rawconfig().
205: '// ]]>'.
206: '</script>'.
207: '<p class="LC_error">'.&mt('The following problems occurred:').
208: '<br />'.
209: $error.
210: '</p><br /><a href="'.$dest.'">'.&mt('Continue').'</a>'
211: );
212: $r->print(&Apache::loncommon::end_page());
213: }
214:
215: sub handler {
216:
217: my $r = shift;
218:
219: my $now=time;
220: my $then=$env{'user.login.time'};
221: my $refresh=$env{'user.refresh.time'};
222: if (!$refresh) {
223: $refresh = $then;
224: }
225: my $envkey;
226: my %dcroles = ();
227: my $numdc = &check_fordc(\%dcroles,$then);
228: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
229: my $custommenu = &Apache::loncommon::needs_gci_custom();
230:
231: # ================================================================== Roles Init
232: if ($env{'form.selectrole'}) {
233:
234: my $locknum=&Apache::lonnet::get_locks();
235: if ($locknum) { return 409; }
236:
237: if ($env{'form.newrole'}) {
238: $env{'form.'.$env{'form.newrole'}}=1;
239: }
240: if ($env{'request.course.id'}) {
241: # Check if user is CC trying to select a course role
242: if ($env{'form.switchrole'}) {
243: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
244: &adhoc_course_role($refresh,$then);
245: }
246: }
247: my %temp=('logout_'.$env{'request.course.id'} => time);
248: &Apache::lonnet::put('email_status',\%temp);
249: &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
250: }
251: &Apache::lonnet::appenv({"request.course.id" => '',
252: "request.course.fn" => '',
253: "request.course.uri" => '',
254: "request.course.sec" => '',
255: "request.role" => 'cm',
256: "request.role.adv" => $env{'user.adv'},
257: "request.role.domain" => $env{'user.domain'}});
258: # Check if user is a DC trying to enter a course or author space and needs privs to be created
259: if ($numdc > 0) {
260: foreach my $envkey (keys %env) {
261: # Is this an ad-hoc Coordinator role?
262: if (my ($ccrole,$domain,$coursenum) =
263: ($envkey =~ m-^form\.(cc|co)\./($match_domain)/($match_courseid)$-)) {
264: if ($dcroles{$domain}) {
265: &Apache::lonnet::check_adhoc_privs($domain,$coursenum,
266: $then,$refresh,$now,$ccrole);
267: }
268: last;
269: }
270: # Is this an ad-hoc CA-role?
271: if (my ($domain,$user) =
272: ($envkey =~ m-^form\.ca\./($match_domain)/($match_username)$-)) {
273: if (($domain eq $env{'user.domain'}) && ($user eq $env{'user.name'})) {
274: delete($env{$envkey});
275: $env{'form.au./'.$domain.'/'} = 1;
276: my ($server_status,$home) = &check_author_homeserver($user,$domain);
277: if ($server_status eq 'switchserver') {
278: my $trolecode = 'au./'.$domain.'/';
279: my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
280: $r->internal_redirect($switchserver);
281: }
282: last;
283: }
284: if (my ($castart,$caend) = ($env{'user.role.ca./'.$domain.'/'.$user} =~ /^(\d*)\.(\d*)$/)) {
285: if (((($castart) && ($castart < $now)) || !$castart) &&
286: ((!$caend) || (($caend) && ($caend > $now)))) {
287: my ($server_status,$home) = &check_author_homeserver($user,$domain);
288: if ($server_status eq 'switchserver') {
289: my $trolecode = 'ca./'.$domain.'/'.$user;
290: my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
291: $r->internal_redirect($switchserver);
292: }
293: last;
294: }
295: }
296: # Check if author blocked ca-access
297: my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],$domain,$user);
298: if ($blocked{'domcoord.author'} eq 'blocked') {
299: delete($env{$envkey});
300: $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
301: last;
302: }
303: if ($dcroles{$domain}) {
304: my ($server_status,$home) = &check_author_homeserver($user,$domain);
305: if (($server_status eq 'ok') || ($server_status eq 'switchserver')) {
306: &Apache::lonnet::check_adhoc_privs($domain,$user,$then,
307: $refresh,$now,'ca');
308: if ($server_status eq 'switchserver') {
309: my $trolecode = 'ca./'.$domain.'/'.$user;
310: my $switchserver = '/adm/switchserver?'
311: .'otherserver='.$home.'&role='.$trolecode;
312: $r->internal_redirect($switchserver);
313: }
314: } else {
315: delete($env{$envkey});
316: }
317: } else {
318: delete($env{$envkey});
319: }
320: last;
321: }
322: }
323: }
324: if (($env{'form.cm'}) && ($env{'form.orgurl'})) {
325: $r->internal_redirect($env{'form.orgurl'});
326: }
327: foreach $envkey (keys %env) {
328: next if ($envkey!~/^user\.role\./);
329: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
330: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
331: \$trolecode,\$tstatus,\$tstart,\$tend);
332: if ($env{'form.'.$trolecode}) {
333: if ($tstatus eq 'is') {
334: $where=~s/^\///;
335: my ($cdom,$cnum,$csec)=split(/\//,$where);
336: # check for course groups
337: my %coursegroups = &Apache::lonnet::get_active_groups(
338: $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
339: my $cgrps = join(':',keys(%coursegroups));
340:
341: # store role if recent_role list being kept
342: if ($env{'environment.recentroles'}) {
343: my %frozen_roles =
344: &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
345: &Apache::lonhtmlcommon::store_recent('roles',
346: $trolecode,' ',$frozen_roles{$trolecode});
347: }
348:
349:
350: # check for keyed access
351: if (($role eq 'st') &&
352: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
353: # who is key authority?
354: my $authdom=$cdom;
355: my $authnum=$cnum;
356: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
357: ($authnum,$authdom)=
358: split(/:/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
359: }
360: # check with key authority
361: unless (&Apache::lonnet::validate_access_key(
362: $env{'environment.key.'.$cdom.'_'.$cnum},
363: $authdom,$authnum)) {
364: # there is no valid key
365: if ($env{'form.newkey'}) {
366: # student attempts to register a new key
367: &Apache::loncommon::content_type($r,'text/html');
368: &Apache::loncommon::no_cache($r);
369: $r->send_http_header;
370: my $swinfo=&Apache::lonmenu::rawconfig();
371: my $start_page=&Apache::loncommon::start_page
372: ('Verifying Access Key to Unlock this Course');
373: my $end_page=&Apache::loncommon::end_page();
374: my $buttontext=&mt('Enter Course');
375: my $message=&mt('Successfully registered key');
376: my $assignresult=
377: &Apache::lonnet::assign_access_key(
378: $env{'form.newkey'},
379: $authdom,$authnum,
380: $cdom,$cnum,
381: $env{'user.domain'},
382: $env{'user.name'},
383: &mt('Assigned from [_1] at [_2] for [_3]'
384: ,$ENV{'REMOTE_ADDR'}
385: ,&Apache::lonlocal::locallocaltime()
386: ,$trolecode)
387: );
388: unless ($assignresult eq 'ok') {
389: $assignresult=~s/^error\:\s*//;
390: $message=&mt($assignresult).
391: '<br /><a href="/adm/logout">'.
392: &mt('Logout').'</a>';
393: $buttontext=&mt('Re-Enter Key');
394: }
395: $r->print(<<ENDENTEREDKEY);
396: $start_page
397: <script type="text/javascript">
398: // <![CDATA[
399: $swinfo
400: // ]]>
401: </script>
402: <form action="" method="post">
403: <input type="hidden" name="selectrole" value="1" />
404: <input type="hidden" name="$trolecode" value="1" />
405: <span class="LC_fontsize_large">$message</span><br />
406: <input type="submit" value="$buttontext" />
407: </form>
408: $end_page
409: ENDENTEREDKEY
410: return OK;
411: } else {
412: # print form to enter a new key
413: &Apache::loncommon::content_type($r,'text/html');
414: &Apache::loncommon::no_cache($r);
415: $r->send_http_header;
416: my $swinfo=&Apache::lonmenu::rawconfig();
417: my $start_page=&Apache::loncommon::start_page
418: ('Enter Access Key to Unlock this Course');
419: my $end_page=&Apache::loncommon::end_page();
420: $r->print(<<ENDENTERKEY);
421: $start_page
422: <script type="text/javascript">
423: // <![CDATA[
424: $swinfo
425: // ]]>
426: </script>
427: <form action="" method="post">
428: <input type="hidden" name="selectrole" value="1" />
429: <input type="hidden" name="$trolecode" value="1" />
430: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
431: <input type="submit" value="Enter key" />
432: </form>
433: $end_page
434: ENDENTERKEY
435: return OK;
436: }
437: }
438: }
439: &Apache::lonnet::log($env{'user.domain'},
440: $env{'user.name'},
441: $env{'user.home'},
442: "Role ".$trolecode);
443:
444: &Apache::lonnet::appenv(
445: {'request.role' => $trolecode,
446: 'request.role.domain' => $cdom,
447: 'request.course.sec' => $csec,
448: 'request.course.groups' => $cgrps});
449: my $tadv=0;
450:
451: if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
452: my $msg;
453: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
454: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
455: my ($furl,$ferr)=
456: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
457: if ($custommenu) {
458: unless (($ferr) || ($env{'form.switchrole'})) {
459: &Apache::lonnet::put('nohist_crslastlogin',{$env{'user.name'}.':'.$env{'user.domain'}.':'.$csec.':'.$role => $now},
460: $cdom,$cnum);
461: }
462: }
463: if (($env{'form.orgurl'}) &&
464: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
465: my $dest=$env{'form.orgurl'};
466: if ($env{'form.symb'}) {
467: if ($dest =~ /\?/) {
468: $dest .= '&';
469: } else {
470: $dest .= '?'
471: }
472: $dest .= 'symb='.$env{'form.symb'};
473: }
474: if (($ferr) && ($tadv)) {
475: &error_page($r,$ferr,$dest);
476: } else {
477: $r->internal_redirect($dest);
478: }
479: return OK;
480: } else {
481: if (!$env{'request.course.id'}) {
482: &Apache::lonnet::appenv(
483: {"request.course.id" => $cdom.'_'.$cnum});
484: $furl='/adm/roles?tryagain=1';
485: $msg='<p><span class="LC_error">'
486: .&mt('Could not initialize [_1] at this time.',
487: $env{'course.'.$cdom.'_'.$cnum.'.description'})
488: .'</span></p>'
489: .'<p>'.&mt('Please try again.').'</p>'
490: .'<p>'.$ferr.'</p>';
491: }
492:
493: if (($ferr) && ($tadv)) {
494: &error_page($r,$ferr,$furl);
495: } else {
496: # Check to see if the user is a CC entering a course
497: # for the first time
498: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
499: if (substr($courseid, 0, 1) eq '/') {
500: $courseid = substr($courseid, 1);
501: }
502: $courseid =~ s/\//_/;
503: if (($cdom ne 'gcitest') && (($role eq 'cc') || ($role eq 'co'))
504: && ($env{'course.' . $courseid .'.course.helper.not.run'})) {
505: $furl = "/adm/helper/course.initialization.helper";
506: # Send the user to the course they selected
507: } elsif ($env{'request.course.id'}) {
508: if ($env{'form.destinationurl'}) {
509: my $dest = $env{'form.destinationurl'};
510: if ($env{'form.destsymb'} ne '') {
511: my $esc_symb = &HTML::Entities::encode($env{'form.destsymb'},'"<>&');
512: $dest .= '?symb='.$esc_symb;
513: }
514: &redirect_user($r,&mt('Entering [_1]',
515: $env{'course.'.$courseid.'.description'}),
516: $dest,$msg,
517: $env{'environment.remotenavmap'});
518: return OK;
519: }
520: if (&Apache::lonnet::allowed('whn',
521: $env{'request.course.id'})
522: || &Apache::lonnet::allowed('whn',
523: $env{'request.course.id'}.'/'
524: .$env{'request.course.sec'})
525: ) {
526: my $startpage = &courseloadpage($courseid);
527: unless (($startpage eq 'firstres') || ($cdom eq 'gcitest')) {
528: $msg = &mt('Entering [_1] ...',
529: $env{'course.'.$courseid.'.description'});
530: &redirect_user($r,&mt('New in course'),
531: '/adm/whatsnew?refpage=start',$msg,
532: $env{'environment.remotenavmap'});
533: return OK;
534: }
535: }
536: }
537: # Are we allowed to look at the first resource?
538: if ($furl !~ m|^/adm/|) {
539: # Guess not ...
540: $furl=&Apache::lonpageflip::first_accessible_resource();
541: }
542: if (($cdom eq 'gcitest') && ($custommenu)) {
543: $furl = '/adm/navmaps';
544: }
545: $msg = &mt('Entering [_1] ...',
546: $env{'course.'.$courseid.'.description'});
547: &redirect_user($r,&mt('Entering [_1]',
548: $env{'course.'.$courseid.'.description'}),
549: $furl,$msg,
550: $env{'environment.remotenavmap'});
551: }
552: return OK;
553: }
554: }
555: #
556: # Send the user to the construction space they selected
557: if ($role =~ /^(au|ca|aa)$/) {
558: my $redirect_url = '/priv/';
559: if ($role eq 'au') {
560: $redirect_url.=$env{'user.name'};
561: } else {
562: $where =~ /\/(.*)$/;
563: $redirect_url .= $1;
564: }
565: $redirect_url .= '/';
566: &redirect_user($r,&mt('Entering Construction Space'),
567: $redirect_url);
568: return OK;
569: }
570: if ($role eq 'dc') {
571: my $redirect_url = '/adm/menu/';
572: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
573: $redirect_url);
574: return OK;
575: }
576: if ($role eq 'sc') {
577: my $redirect_url = '/adm/grades?command=scantronupload';
578: &redirect_user($r,&mt('Loading Data Upload Page'),
579: $redirect_url);
580: return OK;
581: }
582: }
583: }
584: }
585: }
586:
587: # =============================================================== No Roles Init
588:
589: &Apache::loncommon::content_type($r,'text/html');
590: &Apache::loncommon::no_cache($r);
591: $r->send_http_header;
592: return OK if $r->header_only;
593:
594: my ($crumbtext,$pagetitle,$recent,$show_course);
595: $show_course=&Apache::loncommon::show_course();
596: my $noscript='<br /><span class="LC_error">'.&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.').'<br />'.&mt('As this is not the case, most functionality in the system will be unavailable.').'</span><br />';
597: if ($custommenu) {
598: my $start_page = &Apache::loncommon::start_page('Main Menu');
599: $r->print(<<"ENDCUSTOM");
600: $start_page
601: <noscript>
602: $noscript
603: </noscript>
604: ENDCUSTOM
605: } else {
606: $crumbtext = 'User Roles';
607: $pagetitle = 'My Roles';
608: $recent = &mt('Recent Roles');
609: my $standby=&mt('Role selected. Please stand by.');
610: if ($show_course) {
611: $crumbtext = 'Courses';
612: $pagetitle = 'My Courses';
613: $recent = &mt('Recent Courses');
614: $standby = &mt('Course selected. Please stand by.');
615: }
616: my $brcrum = [{ href => '/adm/roles',
617: text => $crumbtext,},
618: ];
619: my $args;
620: if ($numdc) {
621: $args = {bread_crumbs => $brcrum};
622: } else {
623: $args = {bread_crumbs => $brcrum,
624: bread_crumbs_menulink => '_nomenu'};
625: }
626: my $start_page=&Apache::loncommon::start_page($pagetitle,undef,$args);
627: my $swinfo=&Apache::lonmenu::rawconfig();
628: $standby=~s/\n/\\n/g;
629: $r->print(<<ENDHEADER);
630: $start_page
631: <noscript>
632: $noscript
633: </noscript>
634: <script type="text/javascript">
635: // <![CDATA[
636: $swinfo
637: window.focus();
638:
639: active=true;
640:
641: function enterrole (thisform,rolecode,buttonname) {
642: if (active) {
643: active=false;
644: document.title='$standby';
645: window.status='$standby';
646: thisform.newrole.value=rolecode;
647: thisform.submit();
648: } else {
649: alert('$standby');
650: }
651: }
652: // ]]>
653: </script>
654: ENDHEADER
655: }
656:
657: # ------------------------------------------ Get Error Message from Environment
658:
659: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
660: if ($env{'user.error.msg'}) {
661: $r->log_reason(
662: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
663: }
664:
665: # ------------------------------------------------- Can this user re-init, etc?
666:
667: my $advanced=$env{'user.adv'};
668: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
669: my $tryagain=$env{'form.tryagain'};
670: my $reinit=$env{'user.reinit'};
671: delete $env{'user.reinit'};
672:
673: # -------------------------------------------------------- Generate Page Output
674: # --------------------------------------------------------------- Error Header?
675: if ($error) {
676: $r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
677: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
678: if ($priv ne '') {
679: $r->print(&mt('Access : ').&Apache::lonnet::plaintext($priv)."\n");
680: }
681: if ($fn ne '') {
682: $r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
683: }
684: if ($msg ne '') {
685: $r->print(&mt('Action : ').$msg."\n");
686: }
687: $r->print("</pre><hr />");
688: my $url=$fn;
689: my $last;
690: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
691: &GDBM_READER(),0640)) {
692: $last=$hash{'last_known'};
693: untie(%hash);
694: }
695: if ($last) { $fn.='?symb='.&escape($last); }
696:
697: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
698: &Apache::lonenc::check_encrypt($fn));
699: } else {
700: if ($env{'user.error.msg'}) {
701: if ($reinit) {
702: $r->print(
703: '<h3><span class="LC_error">'.
704: &mt('As your session file for the course or community has expired, you will need to re-select it.').'</span></h3>');
705: } else {
706: $r->print(
707: '<h3><span class="LC_error">'.
708: &mt('You need to choose another user role or enter a specific course or community for this function.').
709: '</span></h3>');
710: }
711: }
712: }
713: # -------------------------------------------------------- Choice or no choice?
714: if ($nochoose) {
715: $r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
716: &mt('This action is currently not authorized.').'</span>'.
717: &Apache::loncommon::end_page());
718: return OK;
719: } else {
720: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
721: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
722: }
723: unless ($custommenu) {
724: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
725: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
726: $r->print('<input type="hidden" name="selectrole" value="1" />');
727: $r->print('<input type="hidden" name="newrole" value="" />');
728: }
729: }
730:
731: my (%roletext,%sortrole,%roleclass,%futureroles,%timezones);
732: my ($countactive,$countfuture,$inrole,$possiblerole) =
733: &gather_roles($then,$refresh,$now,$reinit,$nochoose,\%roletext,\%sortrole,\%roleclass,
734: \%futureroles,\%timezones);
735:
736: $refresh = $now;
737: &Apache::lonnet::appenv({'user.refresh.time' => $refresh});
738: if (!$countactive && !$countfuture) {
739: if (&Apache::loncommon::new_roles_update()) {
740: ($countactive,$countfuture,$inrole,$possiblerole) =
741: &gather_roles($then,$refresh,$now,$reinit,$nochoose,\%roletext,\%sortrole,
742: \%roleclass,\%futureroles,\%timezones);
743: }
744: }
745: if ($custommenu) {
746: if ($env{'form.destinationurl'} eq '/adm/gci_info') {
747: $r->print(&gci_info_page()).
748: &Apache::loncommon::end_page();
749: return OK;
750: }
751: my %courses = &Apache::loncommon::existing_gcitest_courses('cc');
752: $env{'browser.interface'}='faketextual';
753: $env{'environment.remote'}='off';
754: my $numcourses = keys(%courses);
755: my $switcher;
756: if ($numcourses > 0) {
757: $switcher = &Apache::loncommon::gcitest_switcher('cc',%courses);
758: my $current;
759: if ($env{'request.course.id'}) {
760: $current = 'cc./'.$env{'course.'.$env{'request.course.id'}.'.domain'}.
761: '/'.$env{'course.'.$env{'request.course.id'}.'.num'};
762: }
763: }
764: $r->print(&Apache::lonmenu::inlinemenu('gcicustom',$switcher).
765: &Apache::loncommon::end_page());
766: return OK;
767: } else {
768: if ($env{'form.destinationurl'} eq '/adm/gci_info') {
769: delete($env{'form.destinationurl'});
770: }
771: }
772: if ($env{'user.adv'}) {
773: $r->print('<p><label><input type="checkbox" name="showall"');
774: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
775: $r->print(' />'.&mt('Show all roles').'</label>'
776: .' <input type="submit" value="'.&mt('Update display').'" />'
777: .'</p>');
778: } else {
779: if ($countactive > 0) {
780: $r->print(&Apache::loncoursequeueadmin::queued_selfenrollment());
781: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
782: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
783: unless ($env{'user.domain'} eq 'gcitest') {
784: $r->print(
785: '<p>'
786: .&mt('[_1]Visit the [_2]Course/Community Catalog[_3]'
787: .' to view all [_4] LON-CAPA courses and communities.'
788: ,'<b>'
789: ,'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
790: ,'</a></b>',$domdesc)
791: .'<br />'
792: .&mt('If a course or community is [_1]not[_2] in your list of current courses and communities below,'
793: .' you may be able to enroll if self-enrollment is permitted.'
794: ,'<b>','</b>')
795: .'</p>'
796: );
797: }
798: }
799: }
800:
801: # No active roles
802: if ($countactive==0) {
803: if ($inrole) {
804: $r->print('<h2>'.&mt('Currently no additional roles, courses or communities').'</h2>');
805: } else {
806: if ($show_course) {
807: if ($env{'user.domain'} eq 'gcitest') {
808: $r->print('<h2>'.&mt('Currently no active Concept Tests').'</h2>');
809: } elsif ($env{'user.domain'} eq 'gci') {
810: $r->print('<h2>'.&mt('Currently not assigned as a GCI contributor').'</h2>');
811: }
812: } else {
813: $r->print('<h2>'.&mt('Currently no active roles, courses or communities').'</h2>');
814: }
815: }
816: unless ($env{'user.domain'} eq 'gcitest') {
817: &findcourse_advice($r);
818: &requestcourse_advice($r);
819: }
820: $r->print('</form>');
821: if ($countfuture) {
822: if ($show_course) {
823: if ($env{'user.domain'} eq 'gcitest') {
824: $r->print(&mt('The following [quant,_1,Concept Test] will be available in the future:',$countfuture));
825: } else {
826: $r->print(&mt('The following [quant,_1,course] will become active in the future:',$countfuture));
827: }
828: } else {
829: $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
830: }
831: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
832: $nochoose);
833: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
834: \%roletext);
835: my $tremark='';
836: my $tbg;
837: if ($env{'request.role'} eq 'cm') {
838: $tbg="LC_roles_selected";
839: $tremark=&mt('Currently selected.').' ';
840: } else {
841: $tbg="LC_roles_is";
842: }
843: $r->print(&Apache::loncommon::start_data_table_row()
844: .'<td class="'.$tbg.'"> </td>'
845: .'<td colspan="3">'
846: .&mt('No role specified')
847: .'</td>'
848: .'<td>'.$tremark.' </td>'
849: .&Apache::loncommon::end_data_table_row()
850: );
851:
852: $r->print(&Apache::loncommon::end_data_table());
853: }
854: $r->print(&Apache::loncommon::end_page());
855: return OK;
856: } elsif ($countactive==1) { # Is there only one choice?
857: my $needs_switchserver;
858: if ($env{'user.author'}) {
859: $needs_switchserver = &check_needs_switchserver($possiblerole);
860: }
861: if ((!$needs_switchserver) && ($env{'request.role'} eq 'cm')) {
862: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
863: '<input type="hidden" name="'.$possiblerole.'" value="1" />'.
864: '<noscript><br /><input type="submit" name="submit" value="'.&mt('Continue').'" /></noscript>');
865: $r->print("</form>\n");
866: $r->rflush();
867: $r->print('<script type="text/javascript">document.forms.rolechoice.submit();</script>');
868: $r->print(&Apache::loncommon::end_page());
869: return OK;
870: }
871: if ($needs_switchserver) {
872: $r->print("<h2>".&mt('Server Switch Required')."</h2>\n".
873: &mt('Construction Space access is only available from '.
874: 'the home server of the corresponding Author.').'<br />'.
875: &mt("Click the 'Switch Server' link to go there.").'<br />');
876: }
877: }
878: # ----------------------------------------------------------------------- Table
879: unless ((!$show_course) || ($nochoose) || ($countactive==1)) {
880: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
881: }
882: if ($env{'form.destinationurl'}) {
883: $r->print('<input type="hidden" name="destinationurl" value="'.
884: $env{'form.destinationurl'}.'" />');
885: if ($env{'form.destsymb'} ne '') {
886: $r->print('<input type="hidden" name="destsymb" value="'.
887: $env{'form.destsymb'}.'" />');
888: }
889: }
890: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
891: if ($env{'environment.recentroles'}) {
892: my %recent_roles =
893: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
894: my $output='';
895: foreach (sort(keys(%recent_roles))) {
896: if (ref($roletext{'user.role.'.$_}) eq 'ARRAY') {
897: $output.= &Apache::loncommon::start_data_table_row().
898: $roletext{'user.role.'.$_}->[0].
899: &Apache::loncommon::end_data_table_row().
900: &Apache::loncommon::continue_data_table_row().
901: $roletext{'user.role.'.$_}->[1].
902: &Apache::loncommon::end_data_table_row();
903: if ($_ =~ m-dc\./($match_domain)/-
904: && $dcroles{$1}) {
905: $output .= &adhoc_roles_row($1,'recent');
906: }
907: } elsif ($numdc > 0) {
908: unless ($_ =~/^error\:/) {
909: $output.=&display_cc_role('user.role.'.$_);
910: }
911: }
912: }
913: if ($output) {
914: $r->print(&Apache::loncommon::start_data_table_empty_row()
915: .'<td align="center" colspan="5">'
916: .$recent
917: .'</td>'
918: .&Apache::loncommon::end_data_table_empty_row()
919: );
920: $r->print($output);
921: $doheaders ++;
922: }
923: }
924:
925: if ($numdc > 0) {
926: $r->print(&coursepick_jscript());
927: $r->print(&Apache::loncommon::coursebrowser_javascript().
928: &Apache::loncommon::authorbrowser_javascript());
929: }
930: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
931: if ($countactive > 1) {
932: my $tremark='';
933: my $tbg;
934: if ($env{'request.role'} eq 'cm') {
935: $tbg="LC_roles_selected";
936: $tremark=&mt('Currently selected.').' ';
937: } else {
938: $tbg="LC_roles_is";
939: }
940: $r->print(&Apache::loncommon::start_data_table_row());
941: unless ($nochoose) {
942: if ($env{'request.role'} ne 'cm') {
943: $r->print('<td class="'.$tbg.'"><input type="submit" value="'.
944: &mt('Select').'" name="cm" /></td>');
945: } else {
946: $r->print('<td class="'.$tbg.'"> </td>');
947: }
948: }
949: $r->print('<td colspan="3">'
950: .&mt('No role specified')
951: .'</td>'
952: .'<td>'.$tremark.' </td>'
953: .&Apache::loncommon::end_data_table_row()
954: );
955: }
956: $r->print(&Apache::loncommon::end_data_table());
957: unless ($nochoose) {
958: $r->print("</form>\n");
959: }
960: # ------------------------------------------------------------ Privileges Info
961: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
962: $r->print('<hr /><h2>'.&mt('Current Privileges').'</h2>');
963: $r->print(&privileges_info());
964: }
965: $r->print(&Apache::lonnet::getannounce());
966: if ($advanced) {
967: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
968: $r->print('<p><small><i>'
969: .&mt('This LON-CAPA server is version [_1]',$r->dir_config('lonVersion'))
970: .'</i><br />'
971: .'<a href="/adm/logout">'.&mt('Logout').'</a> '
972: .'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
973: .&mt('Course/Community Catalog')
974: .'</a></small></p>');
975: }
976: $r->print(&Apache::loncommon::end_page());
977: return OK;
978: }
979:
980: sub gci_info_page {
981: return <<"END";
982: <br clear="all">
983: <div>
984: <h2>Welcome to the Geoscience Concept Inventory WebCenter</h2>
985: <p>
986: Use the tabs to navigate the WebCenter and...
987: <ul>
988: <li>Review and comment on existing GCI questions</li>
989: <li>Submit GCI questions of your own</li>
990: <li>Create an online test for your students</li>
991: <li>View tutorials on creating online tests</li>
992: </ul>
993: </p>
994: <p>For more information about writing and reviewing Concept Inventory questions
995: please refer to the <a href="/res/gci/gci/internal/pdfs/GCIWorkbook.pdf">GCI Workbook</a>.
996: </div>
997: END
998: }
999:
1000: sub gather_roles {
1001: my ($then,$refresh,$now,$reinit,$nochoose,$roletext,$sortrole,$roleclass,$futureroles,$timezones) = @_;
1002: my ($countactive,$countfuture,$inrole,$possiblerole) = (0,0,0,'');
1003: my $advanced = $env{'user.adv'};
1004: my $tryagain = $env{'form.tryagain'};
1005: foreach my $envkey (sort(keys(%env))) {
1006: my $button = 1;
1007: my $switchserver='';
1008: my ($role_text,$role_text_end,$sortkey);
1009: if ($envkey=~/^user\.role\./) {
1010: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
1011: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
1012: \$trolecode,\$tstatus,\$tstart,\$tend);
1013: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
1014: my $timezone = &role_timezone($where,$timezones);
1015: $tremark='';
1016: $tpstart=' ';
1017: $tpend=' ';
1018: if ($tstart) {
1019: $tpstart=&Apache::lonlocal::locallocaltime($tstart,$timezone);
1020: }
1021: if ($tend) {
1022: $tpend=&Apache::lonlocal::locallocaltime($tend,$timezone);
1023: }
1024: if ($env{'request.role'} eq $trolecode) {
1025: $tstatus='selected';
1026: }
1027: my $tbg;
1028: if (($tstatus eq 'is')
1029: || ($tstatus eq 'selected')
1030: || ($tstatus eq 'future')
1031: || ($env{'form.showall'})) {
1032: if ($tstatus eq 'is') {
1033: $tbg='LC_roles_is';
1034: $possiblerole=$trolecode;
1035: $countactive++;
1036: } elsif ($tstatus eq 'future') {
1037: $tbg='LC_roles_future';
1038: $button=0;
1039: $futureroles->{$trolecode} = $tstart.':'.$tend;
1040: $countfuture ++;
1041: } elsif ($tstatus eq 'expired') {
1042: $tbg='LC_roles_expired';
1043: $button=0;
1044: } elsif ($tstatus eq 'will_not') {
1045: $tbg='LC_roles_will_not';
1046: $tremark.=&mt('Expired after logout.').' ';
1047: } elsif ($tstatus eq 'selected') {
1048: $tbg='LC_roles_selected';
1049: $inrole=1;
1050: $countactive++;
1051: $tremark.=&mt('Currently selected.').' ';
1052: }
1053: my $trole;
1054: if ($role =~ /^cr\//) {
1055: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
1056: if ($tremark) { $tremark.='<br />'; }
1057: $tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
1058: }
1059: $trole=Apache::lonnet::plaintext($role);
1060: my $ttype;
1061: my $twhere;
1062: my ($tdom,$trest,$tsection)=
1063: split(/\//,Apache::lonnet::declutter($where));
1064: # First, Co-Authorship roles
1065: if (($role eq 'ca') || ($role eq 'aa')) {
1066: my $home = &Apache::lonnet::homeserver($trest,$tdom);
1067: my $allowed=0;
1068: my @ids=&Apache::lonnet::current_machine_ids();
1069: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1070: if (!$allowed) {
1071: $button=0;
1072: $switchserver='otherserver='.$home.'&role='.$trolecode;
1073: }
1074: #next if ($home eq 'no_host');
1075: $home = &Apache::lonnet::hostname($home);
1076: $ttype='Construction Space';
1077: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
1078: ': '.$tdom.'<br />'.
1079: ' '.&mt('Server').': '.$home;
1080: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1081: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
1082: $sortkey=$role."$trest:$tdom";
1083: } elsif ($role eq 'au') {
1084: # Authors
1085: my $home = &Apache::lonnet::homeserver
1086: ($env{'user.name'},$env{'user.domain'});
1087: my $allowed=0;
1088: my @ids=&Apache::lonnet::current_machine_ids();
1089: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1090: if (!$allowed) {
1091: $button=0;
1092: $switchserver='otherserver='.$home.'&role='.$trolecode;
1093: }
1094: #next if ($home eq 'no_host');
1095: $home = &Apache::lonnet::hostname($home);
1096: $ttype='Construction Space';
1097: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
1098: ': '.$home;
1099: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1100: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
1101: $sortkey=$role;
1102: } elsif ($trest) {
1103: my $tcourseid=$tdom.'_'.$trest;
1104: $ttype = &Apache::loncommon::course_type($tcourseid);
1105: $trole = &Apache::lonnet::plaintext($role,$ttype,$tcourseid);
1106: if ($env{'course.'.$tcourseid.'.description'}) {
1107: $twhere=$env{'course.'.$tcourseid.'.description'};
1108: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1109: unless ($twhere eq &mt('Currently not available')) {
1110: $twhere.=' <span class="LC_fontsize_small">'.
1111: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1112: '</span>';
1113: }
1114: } else {
1115: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1116: if (%newhash) {
1117: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
1118: "\0".$envkey;
1119: $twhere=$newhash{'description'}.
1120: ' <span class="LC_fontsize_small">'.
1121: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1122: '</span>';
1123: $ttype = $newhash{'type'};
1124: $trole = &Apache::lonnet::plaintext($role,$ttype,$tcourseid);
1125: } else {
1126: $twhere=&mt('Currently not available');
1127: $env{'course.'.$tcourseid.'.description'}=$twhere;
1128: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1129: $ttype = 'Unavailable';
1130: }
1131: }
1132: if ($tsection) {
1133: $twhere.='<br />'.&mt('Section').': '.$tsection;
1134: }
1135: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
1136: } elsif ($tdom) {
1137: $ttype='Domain';
1138: $twhere=$tdom;
1139: $sortkey=$role.$twhere;
1140: } else {
1141: $ttype='System';
1142: $twhere=&mt('system wide');
1143: $sortkey=$role.$twhere;
1144: }
1145: ($role_text,$role_text_end) =
1146: &build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,
1147: $advanced,$tremark,$tbg,$trole,$twhere,$tpstart,
1148: $tpend,$nochoose,$button,$switchserver,$reinit);
1149: $roletext->{$envkey}=[$role_text,$role_text_end];
1150: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
1151: $sortrole->{$sortkey}=$envkey;
1152: $roleclass->{$envkey}=$ttype;
1153: }
1154: }
1155: }
1156: return ($countactive,$countfuture,$inrole,$possiblerole);
1157: }
1158:
1159: sub role_timezone {
1160: my ($where,$timezones) = @_;
1161: my $timezone;
1162: if (ref($timezones) eq 'HASH') {
1163: if ($where =~ m{^/($match_domain)/($match_courseid)}) {
1164: my $cdom = $1;
1165: my $cnum = $2;
1166: if ($cdom && $cnum) {
1167: if (!exists($timezones->{$cdom.'_'.$cnum})) {
1168: my %timehash =
1169: &Apache::lonnet::get('environment',['timezone'],$cdom,$cnum);
1170: if ($timehash{'timezone'} eq '') {
1171: if (!exists($timezones->{$cdom})) {
1172: my %domdefaults =
1173: &Apache::lonnet::get_domain_defaults($cdom);
1174: if ($domdefaults{'timezone_def'} eq '') {
1175: $timezones->{$cdom} = 'local';
1176: } else {
1177: $timezones->{$cdom} = $domdefaults{'timezone_def'};
1178: }
1179: }
1180: $timezones->{$cdom.'_'.$cnum} = $timezones->{$cdom};
1181: } else {
1182: $timezones->{$cdom.'_'.$cnum} =
1183: &Apache::lonlocal::gettimezone($timehash{'timezone'});
1184: }
1185: }
1186: $timezone = $timezones->{$cdom.'_'.$cnum};
1187: }
1188: } else {
1189: my ($tdom) = ($where =~ m{^/($match_domain)});
1190: if ($tdom) {
1191: if (!exists($timezones->{$tdom})) {
1192: my %domdefaults = &Apache::lonnet::get_domain_defaults($tdom);
1193: if ($domdefaults{'timezone_def'} eq '') {
1194: $timezones->{$tdom} = 'local';
1195: } else {
1196: $timezones->{$tdom} = $domdefaults{'timezone_def'};
1197: }
1198: }
1199: $timezone = $timezones->{$tdom};
1200: }
1201: }
1202: if ($timezone eq 'local') {
1203: $timezone = undef;
1204: }
1205: }
1206: return $timezone;
1207: }
1208:
1209: sub roletable_headers {
1210: my ($r,$roleclass,$sortrole,$nochoose) = @_;
1211: my $doheaders;
1212: if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
1213: $r->print('<br />'
1214: .&Apache::loncommon::start_data_table()
1215: .&Apache::loncommon::start_data_table_header_row()
1216: );
1217: if (!$nochoose) { $r->print('<th> </th>'); }
1218: $r->print('<th>'.&mt('User Role').'</th>'
1219: .'<th>'.&mt('Extent').'</th>'
1220: .'<th>'.&mt('Start').'</th>'
1221: .'<th>'.&mt('End').'</th>'
1222: .&Apache::loncommon::end_data_table_header_row()
1223: );
1224: $doheaders=-1;
1225: my @roletypes = &roletypes();
1226: foreach my $type (@roletypes) {
1227: my $haverole=0;
1228: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1229: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1230: $haverole=1;
1231: }
1232: }
1233: if ($haverole) { $doheaders++; }
1234: }
1235: }
1236: return $doheaders;
1237: }
1238:
1239: sub roletypes {
1240: my @types = ('Domain','Construction Space','Course','Community','Unavailable','System');
1241: return @types;
1242: }
1243:
1244: sub print_rolerows {
1245: my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
1246: if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
1247: my @types = &roletypes();
1248: foreach my $type (@types) {
1249: my $output;
1250: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1251: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1252: if (ref($roletext) eq 'HASH') {
1253: if (ref($roletext->{$sortrole->{$which}}) eq 'ARRAY') {
1254: $output.= &Apache::loncommon::start_data_table_row().
1255: $roletext->{$sortrole->{$which}}->[0].
1256: &Apache::loncommon::end_data_table_row().
1257: &Apache::loncommon::continue_data_table_row().
1258: $roletext->{$sortrole->{$which}}->[1].
1259: &Apache::loncommon::end_data_table_row();
1260: }
1261: if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
1262: if (ref($dcroles) eq 'HASH') {
1263: if ($dcroles->{$1}) {
1264: $output .= &adhoc_roles_row($1,'');
1265: }
1266: }
1267: }
1268: }
1269: }
1270: }
1271: if ($output) {
1272: if ($doheaders > 0) {
1273: $r->print(&Apache::loncommon::start_data_table_empty_row()
1274: .'<td align="center" colspan="5">'
1275: .&mt($type)
1276: .'</td>'
1277: .&Apache::loncommon::end_data_table_empty_row()
1278: );
1279: }
1280: $r->print($output);
1281: }
1282: }
1283: }
1284: }
1285:
1286: sub findcourse_advice {
1287: my ($r) = @_;
1288: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1289: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1290: if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
1291: $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
1292: <ul>
1293: <li>'.&mt('The course has yet to be created.').'</li>
1294: <li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
1295: <li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
1296: <li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
1297: <li>'.&mt('You registered for the course recently and there is a time lag between the time you register, and the time this information becomes available for the update of LON-CAPA course rosters.').'</li>
1298: </ul>');
1299: } else {
1300: $r->print(&mt('If you were expecting to see an active role listed for a particular course, that course may not have been created yet.').'<br />');
1301: }
1302: my $queued = &Apache::loncoursequeueadmin::queued_selfenrollment();
1303: if ($queued) {
1304: $r->print($queued);
1305: } else {
1306: $r->print(&mt('You have no request for contributor access pending approval by the GCI WebCenter team.').'<ul>'.
1307: '<li>'.&mt('This may mean that action was taken on your request in the time since your most recent log-in.[_1]View [_2]Message[_3] to see if this is the case.','<br />','<a href="/adm/communicate">','</a>').'</li>'.
1308: '<li>'.&mt('If you logout and log-in again you may find you now have access to the Geoscience Concept Inventory, as a contributor.').'</li>'.
1309: '</ul>');
1310: }
1311: return;
1312: }
1313:
1314: sub requestcourse_advice {
1315: my ($r) = @_;
1316: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1317: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1318: my (%can_request,%request_doms);
1319: &Apache::lonnet::check_can_request($env{'user.domain'},\%can_request,\%request_doms);
1320: if (keys(%request_doms) > 0) {
1321: my ($types,$typename) = &Apache::loncommon::course_types();
1322: if ((ref($types) eq 'ARRAY') && (ref($typename) eq 'HASH')) {
1323: $r->print('<h3>'.&mt('Request creation of a course or community').'</h3>'.
1324: '<p>'.&mt('You have rights to request the creation of courses and/or communities in the following domain(s):').'<ul>');
1325: my (@reqdoms,@reqtypes);
1326: foreach my $type (sort(keys(%request_doms))) {
1327: push(@reqtypes,$type);
1328: if (ref($request_doms{$type}) eq 'ARRAY') {
1329: my $domstr = join(', ',map { &Apache::lonnet::domain($_) } sort(@{$request_doms{$type}}));
1330: $r->print(
1331: '<li>'
1332: .&mt('[_1]'.$typename->{$type}.'[_2] in domain: [_3]',
1333: '<i>',
1334: '</i>',
1335: '<b>'.$domstr.'</b>')
1336: .'</li>'
1337: );
1338: foreach my $dom (@{$request_doms{$type}}) {
1339: unless (grep(/^\Q$dom\E/,@reqdoms)) {
1340: push(@reqdoms,$dom);
1341: }
1342: }
1343: }
1344: }
1345: my @showtypes;
1346: foreach my $type (@{$types}) {
1347: if (grep(/^\Q$type\E$/,@reqtypes)) {
1348: push(@showtypes,$type);
1349: }
1350: }
1351: my $requrl = '/adm/requestcourse';
1352: if (@reqdoms == 1) {
1353: $requrl .= '?showdom='.$reqdoms[0];
1354: }
1355: if (@showtypes > 0) {
1356: $requrl.=(($requrl=~/\?/)?'&':'?').'crstype='.$showtypes[0];
1357: }
1358: if (@reqdoms == 1 || @showtypes > 0) {
1359: $requrl .= '&state=crstype&action=new';
1360: }
1361: $r->print('</ul>'.&mt('Use the [_1]request form[_2] to submit a request for creation of a new course or community.','<a href="'.$requrl.'">','</a>').'</p>');
1362: }
1363: }
1364: return;
1365: }
1366:
1367: sub privileges_info {
1368: my ($which) = @_;
1369: my $output;
1370:
1371: $which ||= $env{'request.role'};
1372:
1373: foreach my $envkey (sort(keys(%env))) {
1374: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
1375:
1376: my $where=$1;
1377: my $ttype;
1378: my $twhere;
1379: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
1380: if ($trest) {
1381: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
1382: $ttype='Construction Space';
1383: $twhere='User: '.$trest.', Domain: '.$tdom;
1384: } else {
1385: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
1386: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
1387: if ($tsec) {
1388: my $sec_type = 'Section';
1389: if (exists($env{"user.role.gr.$where"})) {
1390: $sec_type = 'Group';
1391: }
1392: $twhere.=' ('.$sec_type.': '.$tsec.')';
1393: }
1394: }
1395: } elsif ($tdom) {
1396: $ttype='Domain';
1397: $twhere=$tdom;
1398: } else {
1399: $ttype='System';
1400: $twhere='/';
1401: }
1402: $output .= "\n<h3>".&mt($ttype).': '.$twhere.'</h3>'."\n<ul>";
1403: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
1404: next if (!$priv);
1405:
1406: my ($prv,$restr)=split(/\&/,$priv);
1407: my $trestr='';
1408: if ($restr ne 'F') {
1409: $trestr.=' ('.
1410: join(', ',
1411: map { &Apache::lonnet::plaintext($_) }
1412: (split('',$restr))).') ';
1413: }
1414: $output .= "\n\t".
1415: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
1416: }
1417: $output .= "\n".'</ul>';
1418: }
1419: return $output;
1420: }
1421:
1422: sub build_roletext {
1423: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit) = @_;
1424: my ($roletext,$roletext_end);
1425: my $is_dc=($trolecode =~ m/^dc\./);
1426: my $rowspan=($is_dc) ? ''
1427: : ' rowspan="2" ';
1428:
1429: unless ($nochoose) {
1430: my $buttonname=$trolecode;
1431: $buttonname=~s/\W//g;
1432: if (!$button) {
1433: if ($switchserver) {
1434: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'
1435: .'<a href="/adm/switchserver?'.$switchserver.'">'
1436: .&mt('Switch Server')
1437: .'</a></td>';
1438: } else {
1439: $roletext.=('<td'.$rowspan.' class="'.$tbg.'"> </td>');
1440: }
1441: } elsif ($tstatus eq 'is') {
1442: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'.
1443: '<input name="'.$buttonname.'" type="button" value="'.
1444: &mt('Select').'" onclick="javascript:enterrole(this.form,\''.
1445: $trolecode."','".$buttonname.'\');" /></td>';
1446: } elsif ($tryagain) {
1447: $roletext.=
1448: '<td'.$rowspan.' class="'.$tbg.'">'.
1449: '<input name="'.$buttonname.'" type="button" value="'.
1450: &mt('Try Selecting Again').'" onclick="javascript:enterrole(this.form,\''.
1451: $trolecode."','".$buttonname.'\');" /></td>';
1452: } elsif ($advanced) {
1453: $roletext.=
1454: '<td'.$rowspan.' class="'.$tbg.'">'.
1455: '<input name="'.$buttonname.'" type="button" value="'.
1456: &mt('Re-Initialize').'" onclick="javascript:enterrole(this.form,\''.
1457: $trolecode."','".$buttonname.'\');" /></td>';
1458: } elsif ($reinit) {
1459: $roletext.=
1460: '<td'.$rowspan.' class="'.$tbg.'">'.
1461: '<input name="'.$buttonname.'" type="button" value="'.
1462: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1463: $trolecode."','".$buttonname.'\');" /></td>';
1464: } else {
1465: $roletext.=
1466: '<td'.$rowspan.' class="'.$tbg.'">'.
1467: '<input name="'.$buttonname.'" type="button" value="'.
1468: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1469: $trolecode."','".$buttonname.'\');" /></td>';
1470: }
1471: }
1472: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
1473: $tremark.=&Apache::lonannounce::showday(time,1,
1474: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
1475: }
1476: $roletext.='<td>'.$trole.'</td>'
1477: .'<td>'.$twhere.'</td>'
1478: .'<td>'.$tpstart.'</td>'
1479: .'<td>'.$tpend.'</td>';
1480: if (!$is_dc) {
1481: $roletext_end = '<td colspan="4">'.
1482: $tremark.' '.
1483: '</td>';
1484: }
1485: return ($roletext,$roletext_end);
1486: }
1487:
1488: sub check_needs_switchserver {
1489: my ($possiblerole) = @_;
1490: my $needs_switchserver;
1491: my ($role,$where) = split(/\./,$possiblerole,2);
1492: my (undef,$tdom,$twho) = split(/\//,$where);
1493: my ($server_status,$home);
1494: if (($role eq 'ca') || ($role eq 'aa')) {
1495: ($server_status,$home) = &check_author_homeserver($twho,$tdom);
1496: } else {
1497: ($server_status,$home) = &check_author_homeserver($env{'user.name'},
1498: $env{'user.domain'});
1499: }
1500: if ($server_status eq 'switchserver') {
1501: $needs_switchserver = 1;
1502: }
1503: return $needs_switchserver;
1504: }
1505:
1506: sub check_author_homeserver {
1507: my ($uname,$udom)=@_;
1508: if (($uname eq '') || ($udom eq '')) {
1509: return ('fail','');
1510: }
1511: my $home = &Apache::lonnet::homeserver($uname,$udom);
1512: if (&Apache::lonnet::host_domain($home) ne $udom) {
1513: return ('fail',$home);
1514: }
1515: my @ids=&Apache::lonnet::current_machine_ids();
1516: if (grep(/^\Q$home\E$/,@ids)) {
1517: return ('ok',$home);
1518: } else {
1519: return ('switchserver',$home);
1520: }
1521: }
1522:
1523: sub check_fordc {
1524: my ($dcroles,$then) = @_;
1525: my $numdc = 0;
1526: if ($env{'user.adv'}) {
1527: foreach my $envkey (sort keys %env) {
1528: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
1529: my $dcdom = $1;
1530: my $livedc = 1;
1531: my ($tstart,$tend)=split(/\./,$env{$envkey});
1532: if ($tstart && $tstart>$then) { $livedc = 0; }
1533: if ($tend && $tend <$then) { $livedc = 0; }
1534: if ($livedc) {
1535: $$dcroles{$dcdom} = $envkey;
1536: $numdc++;
1537: }
1538: }
1539: }
1540: }
1541: return $numdc;
1542: }
1543:
1544: sub adhoc_course_role {
1545: my ($refresh,$then) = @_;
1546: my ($cdom,$cnum,$crstype);
1547: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1548: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1549: $crstype = &Apache::loncommon::course_type();
1550: if (&check_forcc($cdom,$cnum,$refresh,$then,$crstype)) {
1551: my $setprivs;
1552: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
1553: $setprivs = 1;
1554: } else {
1555: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
1556: if (($start && ($start>$refresh || $start == -1)) ||
1557: ($end && $end<$then)) {
1558: $setprivs = 1;
1559: }
1560: }
1561: if ($setprivs) {
1562: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
1563: my $role = $1;
1564: my $custom_role = $2;
1565: my $usec = $3;
1566: if ($role eq 'cr') {
1567: if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
1568: $role .= $custom_role;
1569: } else {
1570: return;
1571: }
1572: }
1573: my (%userroles,%newrole,%newgroups,%group_privs);
1574: my %cgroups =
1575: &Apache::lonnet::get_active_groups($env{'user.domain'},
1576: $env{'user.name'},$cdom,$cnum);
1577: foreach my $group (keys(%cgroups)) {
1578: $group_privs{$group} =
1579: $env{'user.priv.cc./'.$cdom.'/'.$cnum.'./'.$cdom.'/'.$cnum.'/'.$group};
1580: }
1581: $newgroups{'/'.$cdom.'/'.$cnum} = \%group_privs;
1582: my $area = '/'.$cdom.'/'.$cnum;
1583: my $spec = $role.'.'.$area;
1584: if ($usec ne '') {
1585: $spec .= '/'.$usec;
1586: $area .= '/'.$usec;
1587: }
1588: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1589: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,\%newgroups);
1590: my $adhocstart = $refresh-1;
1591: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1592: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1593: }
1594: }
1595: }
1596: return;
1597: }
1598:
1599: sub check_forcc {
1600: my ($cdom,$cnum,$refresh,$then,$crstype) = @_;
1601: my ($is_cc,$ccrole);
1602: if ($crstype eq 'Community') {
1603: $ccrole = 'co';
1604: } else {
1605: $ccrole = 'cc';
1606: }
1607: if ($cdom ne '' && $cnum ne '') {
1608: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1609: my $envkey = 'user.role.'.$ccrole.'./'.$cdom.'/'.$cnum;
1610: if (defined($env{$envkey})) {
1611: $is_cc = 1;
1612: my ($tstart,$tend)=split(/\./,$env{$envkey});
1613: if ($tstart && $tstart>$refresh) { $is_cc = 0; }
1614: if ($tend && $tend <$then) { $is_cc = 0; }
1615: }
1616: }
1617: }
1618: return $is_cc;
1619: }
1620:
1621: sub courselink {
1622: my ($dcdom,$rowtype) = @_;
1623: my $courseform=&Apache::loncommon::selectcourse_link
1624: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1625: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1626: $dcdom,$dcdom,undef,'Course/Community');
1627: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1628: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1629: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1630: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1631: return $courseform.$hiddenitems;
1632: }
1633:
1634: sub coursepick_jscript {
1635: my %lt = &Apache::lonlocal::texthash(
1636: plsu => "Please use the 'Select Course/Community' link to open a separate pick course window where you may select the course or community you wish to enter.",
1637: youc => 'You can only use this screen to select courses and communities in the current domain.',
1638: );
1639: my $verify_script = <<"END";
1640: <script type="text/javascript">
1641: // <![CDATA[
1642: function verifyCoursePick(caller) {
1643: var numbutton = getIndex(caller)
1644: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1645: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1646: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1647: if (pickedCourse != '') {
1648: if (numbutton != -1) {
1649: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1650: document.rolechoice.elements[numbutton+1].name = courseTarget
1651: document.rolechoice.submit()
1652: }
1653: }
1654: else {
1655: alert("$lt{'plsu'}");
1656: }
1657: }
1658: else {
1659: alert("$lt{'youc'}")
1660: }
1661: }
1662: function getIndex(caller) {
1663: for (var i=0;i<document.rolechoice.elements.length;i++) {
1664: if (document.rolechoice.elements[i] == caller) {
1665: return i;
1666: }
1667: }
1668: return -1;
1669: }
1670: // ]]>
1671: </script>
1672: END
1673: return $verify_script;
1674: }
1675:
1676: sub coauthorlink {
1677: my ($dcdom,$rowtype) = @_;
1678: my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
1679: my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
1680: return $coauthorform.$hiddenitems;
1681: }
1682:
1683: sub display_cc_role {
1684: my $rolekey = shift;
1685: my ($roletext,$roletext_end);
1686: my $advanced = $env{'user.adv'};
1687: my $tryagain = $env{'form.tryagain'};
1688: unless ($rolekey =~/^error\:/) {
1689: if ($rolekey =~ m{^user\.role\.(cc|co)\./($match_domain)/($match_courseid)$}) {
1690: my $ccrole = $1;
1691: my $tcourseid = $2.'_'.$3;
1692: my $trolecode = $1.'./'.$2.'/'.$3;
1693: my $twhere;
1694: my $ttype;
1695: my $tbg='LC_roles_is';
1696: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1697: if (%newhash) {
1698: $twhere=$newhash{'description'}.
1699: ' <span style="LC_fontsize_small">'.
1700: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1).
1701: '</span>';
1702: $ttype = $newhash{'type'};
1703: } else {
1704: $twhere=&mt('Currently not available');
1705: $env{'course.'.$tcourseid.'.description'}=$twhere;
1706: }
1707: my $trole = &Apache::lonnet::plaintext($ccrole,$ttype,$tcourseid);
1708: $twhere.="<br />".&mt('Domain').":".$1;
1709: ($roletext,$roletext_end) = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$trole,$twhere,'','','',1,'');
1710: }
1711: }
1712: return ($roletext,$roletext_end);
1713: }
1714:
1715: sub adhoc_roles_row {
1716: my ($dcdom,$rowtype) = @_;
1717: my $output = &Apache::loncommon::continue_data_table_row()
1718: .' <td colspan="5">'
1719: .&mt('[_1]Ad hoc[_2] roles in domain [_3] --'
1720: ,'<span class="LC_cusr_emph">','</span>',$dcdom)
1721: .' ';
1722: my $selectcclink = &courselink($dcdom,$rowtype);
1723: my $ccrole = &Apache::lonnet::plaintext('co',undef,undef,1);
1724: my $carole = &Apache::lonnet::plaintext('ca');
1725: my $selectcalink = &coauthorlink($dcdom,$rowtype);
1726: $output.=$ccrole.': '.$selectcclink
1727: .' | '.$carole.': '.$selectcalink
1728: .&Apache::loncommon::end_data_table_row();
1729: return $output;
1730: }
1731:
1732: sub recent_filename {
1733: my $area=shift;
1734: return 'nohist_recent_'.&escape($area);
1735: }
1736:
1737: sub courseloadpage {
1738: my ($courseid) = @_;
1739: my $startpage;
1740: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1741: [$courseid.':courseinit']);
1742: my ($tmp) = %entry_settings;
1743: unless ($tmp =~ /^error: 2 /) {
1744: $startpage = $entry_settings{$courseid.':courseinit'};
1745: }
1746: if ($startpage eq '') {
1747: if (exists($env{'environment.course_init_display'})) {
1748: $startpage = $env{'environment.course_init_display'};
1749: }
1750: }
1751: return $startpage;
1752: }
1753:
1754: 1;
1755: __END__
1756:
1757: =head1 NAME
1758:
1759: Apache::lonroles - User Roles Screen
1760:
1761: =head1 SYNOPSIS
1762:
1763: Invoked by /etc/httpd/conf/srm.conf:
1764:
1765: <Location /adm/roles>
1766: PerlAccessHandler Apache::lonacc
1767: SetHandler perl-script
1768: PerlHandler Apache::lonroles
1769: ErrorDocument 403 /adm/login
1770: ErrorDocument 500 /adm/errorhandler
1771: </Location>
1772:
1773: =head1 OVERVIEW
1774:
1775: =head2 Choosing Roles
1776:
1777: C<lonroles> is a handler that allows a user to switch roles in
1778: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1779: default role that a user has before selecting a role, as widely as
1780: possible, but certain handlers for example need specification which
1781: course they should act on, etc. Both in this scenario, and when the
1782: handler determines via C<lonnet>'s C<&allowed> function that a certain
1783: action is not allowed, C<lonroles> is used as error handler. This
1784: allows the user to select another role which may have permission to do
1785: what they were trying to do. C<lonroles> can also be accessed via the
1786: B<CRS> button in the Remote Control.
1787:
1788: =begin latex
1789:
1790: \begin{figure}
1791: \begin{center}
1792: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1793: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1794: \end{center}
1795: \end{figure}
1796:
1797: =end latex
1798:
1799: =head2 Role Initialization
1800:
1801: The privileges for a user are established at login time and stored in the session environment. As a consequence, a new role does not become active till the next login. Handlers are able to query for privileges using C<lonnet>'s C<&allowed> function. When a user first logs in, their role is the "common" role, which means that they have the sum of all of their privileges. During a session it might become necessary to choose a particular role, which as a consequence also limits the user to only the privileges in that particular role.
1802:
1803: =head1 INTRODUCTION
1804:
1805: This module enables a user to select what role he wishes to
1806: operate under (instructor, student, teaching assistant, course
1807: coordinator, etc). These roles are pre-established by the actions
1808: of upper-level users.
1809:
1810: This is part of the LearningOnline Network with CAPA project
1811: described at http://www.lon-capa.org.
1812:
1813: =head1 HANDLER SUBROUTINE
1814:
1815: This routine is called by Apache and mod_perl.
1816:
1817: =over 4
1818:
1819: =item *
1820:
1821: Roles Initialization (yes/no)
1822:
1823: =item *
1824:
1825: Get Error Message from Environment
1826:
1827: =item *
1828:
1829: Who is this?
1830:
1831: =item *
1832:
1833: Generate Page Output
1834:
1835: =item *
1836:
1837: Choice or no choice
1838:
1839: =item *
1840:
1841: Table
1842:
1843: =item *
1844:
1845: Privileges
1846:
1847: =back
1848:
1849: =cut
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