File:
[LON-CAPA] /
loncom /
auth /
lonroles.pm
Revision
1.240.2.3:
download - view:
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Tue Dec 15 05:04:17 2009 UTC (14 years, 6 months ago) by
raeburn
Branches:
GCI_3
- Customization for GCI_3.
- For GCI users:
- Replace standard roles screen with custom main menu.
- First item displayed for CCs after selecting Concept Test is Course Contents instead of What's New?
1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.240.2.3 2009/12/15 05:04:17 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::lonmainmenu();
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: my $end_page = &Apache::loncommon::end_page();
169:
170: # Note to style police:
171: # This must only replace the spaces, nothing else, or it bombs elsewhere.
172: $url=~s/ /\%20/g;
173: $r->print(<<ENDREDIR);
174: $start_page
175: <script type="text/javascript">
176: // <![CDATA[
177: $swinfo
178: // ]]>
179: </script>
180: $navwindow
181: <p>$msg</p>
182: $end_page
183: ENDREDIR
184: return;
185: }
186:
187: sub error_page {
188: my ($r,$error,$dest)=@_;
189: &Apache::loncommon::content_type($r,'text/html');
190: &Apache::loncommon::no_cache($r);
191: $r->send_http_header;
192: return OK if $r->header_only;
193: # Breadcrumbs
194: my $brcrum = [{'href' => $dest,
195: 'text' => 'Problems during Course Initialization'},];
196: $r->print(&Apache::loncommon::start_page('Problems during Course Initialization',
197: undef,
198: {'bread_crumbs' => $brcrum,})
199: );
200: $r->print(
201: '<script type="text/javascript">'.
202: '// <![CDATA['.
203: &Apache::lonmenu::rawconfig().
204: '// ]]>'.
205: '</script>'.
206: '<p class="LC_error">'.&mt('The following problems occurred:').
207: '<br />'.
208: $error.
209: '</p><br /><a href="'.$dest.'">'.&mt('Continue').'</a>'
210: );
211: $r->print(&Apache::loncommon::end_page());
212: }
213:
214: sub handler {
215:
216: my $r = shift;
217:
218: my $now=time;
219: my $then=$env{'user.login.time'};
220: my $refresh=$env{'user.refresh.time'};
221: if (!$refresh) {
222: $refresh = $then;
223: }
224: my $envkey;
225: my %dcroles = ();
226: my $numdc = &check_fordc(\%dcroles,$then);
227: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
228: my $custommenu = &Apache::loncommon::needs_gci_custom();
229:
230: # ================================================================== Roles Init
231: if ($env{'form.selectrole'}) {
232:
233: my $locknum=&Apache::lonnet::get_locks();
234: if ($locknum) { return 409; }
235:
236: if ($env{'form.newrole'}) {
237: $env{'form.'.$env{'form.newrole'}}=1;
238: }
239: if ($env{'request.course.id'}) {
240: # Check if user is CC trying to select a course role
241: if ($env{'form.switchrole'}) {
242: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
243: &adhoc_course_role($refresh,$then);
244: }
245: }
246: my %temp=('logout_'.$env{'request.course.id'} => time);
247: &Apache::lonnet::put('email_status',\%temp);
248: &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
249: }
250: &Apache::lonnet::appenv({"request.course.id" => '',
251: "request.course.fn" => '',
252: "request.course.uri" => '',
253: "request.course.sec" => '',
254: "request.role" => 'cm',
255: "request.role.adv" => $env{'user.adv'},
256: "request.role.domain" => $env{'user.domain'}});
257: # Check if user is a DC trying to enter a course or author space and needs privs to be created
258: if ($numdc > 0) {
259: foreach my $envkey (keys %env) {
260: # Is this an ad-hoc Coordinator role?
261: if (my ($ccrole,$domain,$coursenum) =
262: ($envkey =~ m-^form\.(cc|co)\./($match_domain)/($match_courseid)$-)) {
263: if ($dcroles{$domain}) {
264: &Apache::lonnet::check_adhoc_privs($domain,$coursenum,
265: $then,$refresh,$now,$ccrole);
266: }
267: last;
268: }
269: # Is this an ad-hoc CA-role?
270: if (my ($domain,$user) =
271: ($envkey =~ m-^form\.ca\./($match_domain)/($match_username)$-)) {
272: if (($domain eq $env{'user.domain'}) && ($user eq $env{'user.name'})) {
273: delete($env{$envkey});
274: $env{'form.au./'.$domain.'/'} = 1;
275: my ($server_status,$home) = &check_author_homeserver($user,$domain);
276: if ($server_status eq 'switchserver') {
277: my $trolecode = 'au./'.$domain.'/';
278: my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
279: $r->internal_redirect($switchserver);
280: }
281: last;
282: }
283: if (my ($castart,$caend) = ($env{'user.role.ca./'.$domain.'/'.$user} =~ /^(\d*)\.(\d*)$/)) {
284: if (((($castart) && ($castart < $now)) || !$castart) &&
285: ((!$caend) || (($caend) && ($caend > $now)))) {
286: my ($server_status,$home) = &check_author_homeserver($user,$domain);
287: if ($server_status eq 'switchserver') {
288: my $trolecode = 'ca./'.$domain.'/'.$user;
289: my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
290: $r->internal_redirect($switchserver);
291: }
292: last;
293: }
294: }
295: # Check if author blocked ca-access
296: my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],$domain,$user);
297: if ($blocked{'domcoord.author'} eq 'blocked') {
298: delete($env{$envkey});
299: $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
300: last;
301: }
302: if ($dcroles{$domain}) {
303: my ($server_status,$home) = &check_author_homeserver($user,$domain);
304: if (($server_status eq 'ok') || ($server_status eq 'switchserver')) {
305: &Apache::lonnet::check_adhoc_privs($domain,$user,$then,
306: $refresh,$now,'ca');
307: if ($server_status eq 'switchserver') {
308: my $trolecode = 'ca./'.$domain.'/'.$user;
309: my $switchserver = '/adm/switchserver?'
310: .'otherserver='.$home.'&role='.$trolecode;
311: $r->internal_redirect($switchserver);
312: }
313: } else {
314: delete($env{$envkey});
315: }
316: } else {
317: delete($env{$envkey});
318: }
319: last;
320: }
321: }
322: }
323: if (($env{'form.cm'}) && ($env{'form.orgurl'})) {
324: $r->internal_redirect($env{'form.orgurl'});
325: }
326: foreach $envkey (keys %env) {
327: next if ($envkey!~/^user\.role\./);
328: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
329: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
330: \$trolecode,\$tstatus,\$tstart,\$tend);
331: if ($env{'form.'.$trolecode}) {
332: if ($tstatus eq 'is') {
333: $where=~s/^\///;
334: my ($cdom,$cnum,$csec)=split(/\//,$where);
335: # check for course groups
336: my %coursegroups = &Apache::lonnet::get_active_groups(
337: $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
338: my $cgrps = join(':',keys(%coursegroups));
339:
340: # store role if recent_role list being kept
341: if ($env{'environment.recentroles'}) {
342: my %frozen_roles =
343: &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
344: &Apache::lonhtmlcommon::store_recent('roles',
345: $trolecode,' ',$frozen_roles{$trolecode});
346: }
347:
348:
349: # check for keyed access
350: if (($role eq 'st') &&
351: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
352: # who is key authority?
353: my $authdom=$cdom;
354: my $authnum=$cnum;
355: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
356: ($authnum,$authdom)=
357: split(/:/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
358: }
359: # check with key authority
360: unless (&Apache::lonnet::validate_access_key(
361: $env{'environment.key.'.$cdom.'_'.$cnum},
362: $authdom,$authnum)) {
363: # there is no valid key
364: if ($env{'form.newkey'}) {
365: # student attempts to register a new key
366: &Apache::loncommon::content_type($r,'text/html');
367: &Apache::loncommon::no_cache($r);
368: $r->send_http_header;
369: my $swinfo=&Apache::lonmenu::rawconfig();
370: my $start_page=&Apache::loncommon::start_page
371: ('Verifying Access Key to Unlock this Course');
372: my $end_page=&Apache::loncommon::end_page();
373: my $buttontext=&mt('Enter Course');
374: my $message=&mt('Successfully registered key');
375: my $assignresult=
376: &Apache::lonnet::assign_access_key(
377: $env{'form.newkey'},
378: $authdom,$authnum,
379: $cdom,$cnum,
380: $env{'user.domain'},
381: $env{'user.name'},
382: &mt('Assigned from [_1] at [_2] for [_3]'
383: ,$ENV{'REMOTE_ADDR'}
384: ,&Apache::lonlocal::locallocaltime()
385: ,$trolecode)
386: );
387: unless ($assignresult eq 'ok') {
388: $assignresult=~s/^error\:\s*//;
389: $message=&mt($assignresult).
390: '<br /><a href="/adm/logout">'.
391: &mt('Logout').'</a>';
392: $buttontext=&mt('Re-Enter Key');
393: }
394: $r->print(<<ENDENTEREDKEY);
395: $start_page
396: <script type="text/javascript">
397: // <![CDATA[
398: $swinfo
399: // ]]>
400: </script>
401: <form action="" method="post">
402: <input type="hidden" name="selectrole" value="1" />
403: <input type="hidden" name="$trolecode" value="1" />
404: <span class="LC_fontsize_large">$message</span><br />
405: <input type="submit" value="$buttontext" />
406: </form>
407: $end_page
408: ENDENTEREDKEY
409: return OK;
410: } else {
411: # print form to enter a new key
412: &Apache::loncommon::content_type($r,'text/html');
413: &Apache::loncommon::no_cache($r);
414: $r->send_http_header;
415: my $swinfo=&Apache::lonmenu::rawconfig();
416: my $start_page=&Apache::loncommon::start_page
417: ('Enter Access Key to Unlock this Course');
418: my $end_page=&Apache::loncommon::end_page();
419: $r->print(<<ENDENTERKEY);
420: $start_page
421: <script type="text/javascript">
422: // <![CDATA[
423: $swinfo
424: // ]]>
425: </script>
426: <form action="" method="post">
427: <input type="hidden" name="selectrole" value="1" />
428: <input type="hidden" name="$trolecode" value="1" />
429: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
430: <input type="submit" value="Enter key" />
431: </form>
432: $end_page
433: ENDENTERKEY
434: return OK;
435: }
436: }
437: }
438: &Apache::lonnet::log($env{'user.domain'},
439: $env{'user.name'},
440: $env{'user.home'},
441: "Role ".$trolecode);
442:
443: &Apache::lonnet::appenv(
444: {'request.role' => $trolecode,
445: 'request.role.domain' => $cdom,
446: 'request.course.sec' => $csec,
447: 'request.course.groups' => $cgrps});
448: my $tadv=0;
449:
450: if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
451: my $msg;
452: my ($furl,$ferr)=
453: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
454: if (($env{'form.orgurl'}) &&
455: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
456: my $dest=$env{'form.orgurl'};
457: if ($env{'form.symb'}) {
458: if ($dest =~ /\?/) {
459: $dest .= '&';
460: } else {
461: $dest .= '?'
462: }
463: $dest .= 'symb='.$env{'form.symb'};
464: }
465: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
466: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
467: if (($ferr) && ($tadv)) {
468: &error_page($r,$ferr,$dest);
469: } else {
470: $r->internal_redirect($dest);
471: }
472: return OK;
473: } else {
474: if (!$env{'request.course.id'}) {
475: &Apache::lonnet::appenv(
476: {"request.course.id" => $cdom.'_'.$cnum});
477: $furl='/adm/roles?tryagain=1';
478: $msg='<p><span class="LC_error">'
479: .&mt('Could not initialize [_1] at this time.',
480: $env{'course.'.$cdom.'_'.$cnum.'.description'})
481: .'</span></p>'
482: .'<p>'.&mt('Please try again.').'</p>'
483: .'<p>'.$ferr.'</p>';
484: }
485: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
486: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
487:
488: if (($ferr) && ($tadv)) {
489: &error_page($r,$ferr,$furl);
490: } else {
491: # Check to see if the user is a CC entering a course
492: # for the first time
493: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
494: if (substr($courseid, 0, 1) eq '/') {
495: $courseid = substr($courseid, 1);
496: }
497: $courseid =~ s/\//_/;
498: if (($cdom ne 'gcitest') && (($role eq 'cc') || ($role eq 'co'))
499: && ($env{'course.' . $courseid .'.course.helper.not.run'})) {
500: $furl = "/adm/helper/course.initialization.helper";
501: # Send the user to the course they selected
502: } elsif ($env{'request.course.id'}) {
503: if ($env{'form.destinationurl'}) {
504: my $dest = $env{'form.destinationurl'};
505: if ($env{'form.destsymb'} ne '') {
506: my $esc_symb = &HTML::Entities::encode($env{'form.destsymb'},'"<>&');
507: $dest .= '?symb='.$esc_symb;
508: }
509: &redirect_user($r,&mt('Entering [_1]',
510: $env{'course.'.$courseid.'.description'}),
511: $dest,$msg,
512: $env{'environment.remotenavmap'});
513: return OK;
514: }
515: if (&Apache::lonnet::allowed('whn',
516: $env{'request.course.id'})
517: || &Apache::lonnet::allowed('whn',
518: $env{'request.course.id'}.'/'
519: .$env{'request.course.sec'})
520: ) {
521: my $startpage = &courseloadpage($courseid);
522: unless (($startpage eq 'firstres') || ($cdom eq 'gcitest')) {
523: $msg = &mt('Entering [_1] ...',
524: $env{'course.'.$courseid.'.description'});
525: &redirect_user($r,&mt('New in course'),
526: '/adm/whatsnew?refpage=start',$msg,
527: $env{'environment.remotenavmap'});
528: return OK;
529: }
530: }
531: }
532: # Are we allowed to look at the first resource?
533: if ($furl !~ m|^/adm/|) {
534: # Guess not ...
535: $furl=&Apache::lonpageflip::first_accessible_resource();
536: }
537: if (($cdom eq 'gcitest') && ($custommenu)) {
538: $furl = '/adm/navmaps';
539: }
540: $msg = &mt('Entering [_1] ...',
541: $env{'course.'.$courseid.'.description'});
542: &redirect_user($r,&mt('Entering [_1]',
543: $env{'course.'.$courseid.'.description'}),
544: $furl,$msg,
545: $env{'environment.remotenavmap'});
546: }
547: return OK;
548: }
549: }
550: #
551: # Send the user to the construction space they selected
552: if ($role =~ /^(au|ca|aa)$/) {
553: my $redirect_url = '/priv/';
554: if ($role eq 'au') {
555: $redirect_url.=$env{'user.name'};
556: } else {
557: $where =~ /\/(.*)$/;
558: $redirect_url .= $1;
559: }
560: $redirect_url .= '/';
561: &redirect_user($r,&mt('Entering Construction Space'),
562: $redirect_url);
563: return OK;
564: }
565: if ($role eq 'dc') {
566: my $redirect_url = '/adm/menu/';
567: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
568: $redirect_url);
569: return OK;
570: }
571: if ($role eq 'sc') {
572: my $redirect_url = '/adm/grades?command=scantronupload';
573: &redirect_user($r,&mt('Loading Data Upload Page'),
574: $redirect_url);
575: return OK;
576: }
577: }
578: }
579: }
580: }
581:
582: # =============================================================== No Roles Init
583:
584: &Apache::loncommon::content_type($r,'text/html');
585: &Apache::loncommon::no_cache($r);
586: $r->send_http_header;
587: return OK if $r->header_only;
588:
589: my ($crumbtext,$pagetitle,$recent,$show_course);
590: my $noscript='<span class="LC_error">'.&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.').'<br />'.&mt('As this is not the case, most functionality in the system will be unavailable.').'</span><br />';
591: if ($custommenu) {
592: my $start_page = &Apache::loncommon::start_page('Main Menu',undef,
593: {'bread_crumbs' => 1});
594: $r->print(<<"ENDCUSTOM");
595: $start_page
596: <br />
597: <noscript>
598: $noscript
599: </noscript>
600: ENDCUSTOM
601: } else {
602: $crumbtext = 'User Roles';
603: $pagetitle = 'My Roles';
604: $recent = &mt('Recent Roles');
605: $show_course=&Apache::loncommon::show_course();
606: if ($show_course) {
607: $crumbtext = 'Courses';
608: $pagetitle = 'My Courses';
609: $recent = &mt('Recent Courses');
610: }
611: my $brcrum =[{href=>"/adm/roles",text=>$crumbtext}];
612: my $swinfo=&Apache::lonmenu::rawconfig();
613: my $start_page=&Apache::loncommon::start_page($pagetitle,undef,{bread_crumbs=>$brcrum});
614: my $standby=&mt('Role selected. Please stand by.');
615: $standby=~s/\n/\\n/g;
616: $r->print(<<ENDHEADER);
617: $start_page
618: <br />
619: <noscript>
620: $noscript
621: </noscript>
622: <script type="text/javascript">
623: // <![CDATA[
624: $swinfo
625: window.focus();
626:
627: active=true;
628:
629: function enterrole (thisform,rolecode,buttonname) {
630: if (active) {
631: active=false;
632: document.title='$standby';
633: window.status='$standby';
634: thisform.newrole.value=rolecode;
635: thisform.submit();
636: } else {
637: alert('$standby');
638: }
639: }
640: // ]]>
641: </script>
642: ENDHEADER
643: }
644:
645: # ------------------------------------------ Get Error Message from Environment
646:
647: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
648: if ($env{'user.error.msg'}) {
649: $r->log_reason(
650: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
651: }
652:
653: # ------------------------------------------------- Can this user re-init, etc?
654:
655: my $advanced=$env{'user.adv'};
656: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
657: my $tryagain=$env{'form.tryagain'};
658: my $reinit=$env{'user.reinit'};
659: delete $env{'user.reinit'};
660:
661: # -------------------------------------------------------- Generate Page Output
662: # --------------------------------------------------------------- Error Header?
663: if ($error) {
664: $r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
665: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
666: if ($priv ne '') {
667: $r->print(&mt('Access : ').&Apache::lonnet::plaintext($priv)."\n");
668: }
669: if ($fn ne '') {
670: $r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
671: }
672: if ($msg ne '') {
673: $r->print(&mt('Action : ').$msg."\n");
674: }
675: $r->print("</pre><hr />");
676: my $url=$fn;
677: my $last;
678: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
679: &GDBM_READER(),0640)) {
680: $last=$hash{'last_known'};
681: untie(%hash);
682: }
683: if ($last) { $fn.='?symb='.&escape($last); }
684:
685: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
686: &Apache::lonenc::check_encrypt($fn));
687: } else {
688: if ($env{'user.error.msg'}) {
689: if ($reinit) {
690: $r->print(
691: '<h3><span class="LC_error">'.
692: &mt('As your session file for the course or community has expired, you will need to re-select it.').'</span></h3>');
693: } else {
694: $r->print(
695: '<h3><span class="LC_error">'.
696: &mt('You need to choose another user role or enter a specific course or community for this function.').
697: '</span></h3>');
698: }
699: }
700: }
701: # -------------------------------------------------------- Choice or no choice?
702: if ($nochoose) {
703: $r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
704: &mt('This action is currently not authorized.').'</span>'.
705: &Apache::loncommon::end_page());
706: return OK;
707: } else {
708: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
709: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
710: }
711: unless ($custommenu) {
712: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
713: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
714: $r->print('<input type="hidden" name="selectrole" value="1" />');
715: $r->print('<input type="hidden" name="newrole" value="" />');
716: }
717: }
718:
719: my (%roletext,%sortrole,%roleclass,%futureroles,%timezones);
720: my ($countactive,$countfuture,$inrole,$possiblerole) =
721: &gather_roles($then,$refresh,$now,$reinit,$nochoose,\%roletext,\%sortrole,\%roleclass,
722: \%futureroles,\%timezones);
723:
724: $refresh = $now;
725: &Apache::lonnet::appenv({'user.refresh.time' => $refresh});
726: if ($custommenu) {
727: my %courses = &Apache::loncommon::existing_gcitest_courses();
728: $env{'browser.interface'}='faketextual';
729: $env{'environment.remote'}='off';
730: my $numcourses = keys(%courses);
731: my $switcher;
732: if ($numcourses > 0) {
733: $switcher = &Apache::lonmainmenu::gcitest_switcher(%courses);
734: my $current;
735: if ($env{'request.course.id'}) {
736: $current = 'cc./'.$env{'course.'.$env{'request.course.id'}.'.domain'}.
737: '/'.$env{'course.'.$env{'request.course.id'}.'.num'};
738: }
739: my $switcher_js = &Apache::lonmainmenu::gcitest_switcher_js($current,$numcourses);
740: $r->print(<<"ENDSCRIPT");
741: <script type="text/javascript">
742: // <![CDATA[
743: $switcher_js
744: // ]]>
745: </script>
746: ENDSCRIPT
747: }
748: $r->print(&Apache::lonmenu::inlinemenu('gcicustom',$switcher).
749: &Apache::loncommon::end_page());
750: return OK;
751: }
752: if ($env{'user.adv'}) {
753: $r->print('<p><label><input type="checkbox" name="showall"');
754: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
755: $r->print(' />'.&mt('Show all roles').'</label>'
756: .' <input type="submit" value="'.&mt('Update display').'" />'
757: .'</p>');
758: } else {
759: if ($countactive > 0) {
760: &queued_selfenrollment($r);
761: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
762: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
763: $r->print(
764: '<p>'
765: .&mt('[_1]Visit the [_2]Course/Community Catalog[_3]'
766: .' to view all [_4] LON-CAPA courses and communities.'
767: ,'<b>'
768: ,'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
769: ,'</a></b>',$domdesc)
770: .'<br />'
771: .&mt('If a course or community is [_1]not[_2] in your list of current courses and communities below,'
772: .' you may be able to enroll if self-enrollment is permitted.'
773: ,'<b>','</b>')
774: .'</p>'
775: );
776: }
777: }
778:
779: # No active roles
780: if ($countactive==0) {
781: if ($inrole) {
782: $r->print('<h2>'.&mt('Currently no additional roles, courses or communities').'</h2>');
783: } else {
784: $r->print('<h2>'.&mt('Currently no active roles, courses or communities').'</h2>');
785: }
786: &findcourse_advice($r);
787: &requestcourse_advice($r);
788: $r->print('</form>');
789: if ($countfuture) {
790: $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
791: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
792: $nochoose);
793: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
794: \%roletext);
795: my $tremark='';
796: my $tbg;
797: if ($env{'request.role'} eq 'cm') {
798: $tbg="LC_roles_selected";
799: $tremark=&mt('Currently selected.').' ';
800: } else {
801: $tbg="LC_roles_is";
802: }
803: $r->print(&Apache::loncommon::start_data_table_row()
804: .'<td class="'.$tbg.'"> </td>'
805: .'<td colspan="3">'
806: .&mt('No role specified')
807: .'</td>'
808: .'<td>'.$tremark.' </td>'
809: .&Apache::loncommon::end_data_table_row()
810: );
811:
812: $r->print(&Apache::loncommon::end_data_table());
813: }
814: $r->print(&Apache::loncommon::end_page());
815: return OK;
816: } elsif ($countactive==1) { # Is there only one choice?
817: my $needs_switchserver;
818: if ($env{'user.author'}) {
819: $needs_switchserver = &check_needs_switchserver($possiblerole);
820: }
821: if ((!$needs_switchserver) && ($env{'request.role'} eq 'cm')) {
822: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
823: '<input type="hidden" name="'.$possiblerole.'" value="1" />'.
824: '<noscript><br /><input type="submit" name="submit" value="'.&mt('Continue').'" /></noscript>');
825: $r->print("</form>\n");
826: $r->rflush();
827: $r->print('<script type="text/javascript">document.forms.rolechoice.submit();</script>');
828: $r->print(&Apache::loncommon::end_page());
829: return OK;
830: }
831: if ($needs_switchserver) {
832: $r->print("<h2>".&mt('Server Switch Required')."</h2>\n".
833: &mt('Construction Space access is only available from '.
834: 'the home server of the corresponding Author.').'<br />'.
835: &mt("Click the 'Switch Server' link to go there.").'<br />');
836: }
837: }
838: # ----------------------------------------------------------------------- Table
839: unless ((!&Apache::loncommon::show_course()) || ($nochoose) || ($countactive==1)) {
840: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
841: }
842: if ($env{'form.destinationurl'}) {
843: $r->print('<input type="hidden" name="destinationurl" value="'.
844: $env{'form.destinationurl'}.'" />');
845: if ($env{'form.destsymb'} ne '') {
846: $r->print('<input type="hidden" name="destsymb" value="'.
847: $env{'form.destsymb'}.'" />');
848: }
849: }
850: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
851: if ($env{'environment.recentroles'}) {
852: my %recent_roles =
853: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
854: my $output='';
855: foreach (sort(keys(%recent_roles))) {
856: if (ref($roletext{'user.role.'.$_}) eq 'ARRAY') {
857: $output.= &Apache::loncommon::start_data_table_row().
858: $roletext{'user.role.'.$_}->[0].
859: &Apache::loncommon::end_data_table_row().
860: &Apache::loncommon::continue_data_table_row().
861: $roletext{'user.role.'.$_}->[1].
862: &Apache::loncommon::end_data_table_row();
863: if ($_ =~ m-dc\./($match_domain)/-
864: && $dcroles{$1}) {
865: $output .= &adhoc_roles_row($1,'recent');
866: }
867: } elsif ($numdc > 0) {
868: unless ($_ =~/^error\:/) {
869: $output.=&display_cc_role('user.role.'.$_);
870: }
871: }
872: }
873: if ($output) {
874: $r->print(&Apache::loncommon::start_data_table_empty_row()
875: .'<td align="center" colspan="5">'
876: .$recent
877: .'</td>'
878: .&Apache::loncommon::end_data_table_empty_row()
879: );
880: $r->print($output);
881: $doheaders ++;
882: }
883: }
884:
885: if ($numdc > 0) {
886: $r->print(&coursepick_jscript());
887: $r->print(&Apache::loncommon::coursebrowser_javascript().
888: &Apache::loncommon::authorbrowser_javascript());
889: }
890: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
891: if ($countactive > 1) {
892: my $tremark='';
893: my $tbg;
894: if ($env{'request.role'} eq 'cm') {
895: $tbg="LC_roles_selected";
896: $tremark=&mt('Currently selected.').' ';
897: } else {
898: $tbg="LC_roles_is";
899: }
900: $r->print(&Apache::loncommon::start_data_table_row());
901: unless ($nochoose) {
902: if ($env{'request.role'} ne 'cm') {
903: $r->print('<td class="'.$tbg.'"><input type="submit" value="'.
904: &mt('Select').'" name="cm" /></td>');
905: } else {
906: $r->print('<td class="'.$tbg.'"> </td>');
907: }
908: }
909: $r->print('<td colspan="3">'
910: .&mt('No role specified')
911: .'</td>'
912: .'<td>'.$tremark.' </td>'
913: .&Apache::loncommon::end_data_table_row()
914: );
915: }
916: $r->print(&Apache::loncommon::end_data_table());
917: unless ($nochoose) {
918: $r->print("</form>\n");
919: }
920: # ------------------------------------------------------------ Privileges Info
921: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
922: $r->print('<hr /><h2>'.&mt('Current Privileges').'</h2>');
923: $r->print(&privileges_info());
924: }
925: $r->print(&Apache::lonnet::getannounce());
926: if ($advanced) {
927: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
928: $r->print('<p><small><i>'
929: .&mt('This LON-CAPA server is version [_1]',$r->dir_config('lonVersion'))
930: .'</i><br />'
931: .'<a href="/adm/logout">'.&mt('Logout').'</a> '
932: .'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
933: .&mt('Course/Community Catalog')
934: .'</a></small></p>');
935: }
936: $r->print(&Apache::loncommon::end_page());
937: return OK;
938: }
939:
940: sub gather_roles {
941: my ($then,$refresh,$now,$reinit,$nochoose,$roletext,$sortrole,$roleclass,$futureroles,$timezones) = @_;
942: my ($countactive,$countfuture,$inrole,$possiblerole) = (0,0,0,'');
943: my $advanced = $env{'user.adv'};
944: my $tryagain = $env{'form.tryagain'};
945: foreach my $envkey (sort(keys(%env))) {
946: my $button = 1;
947: my $switchserver='';
948: my ($role_text,$role_text_end,$sortkey);
949: if ($envkey=~/^user\.role\./) {
950: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
951: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
952: \$trolecode,\$tstatus,\$tstart,\$tend);
953: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
954: my $timezone = &role_timezone($where,$timezones);
955: $tremark='';
956: $tpstart=' ';
957: $tpend=' ';
958: if ($tstart) {
959: $tpstart=&Apache::lonlocal::locallocaltime($tstart,$timezone);
960: }
961: if ($tend) {
962: $tpend=&Apache::lonlocal::locallocaltime($tend,$timezone);
963: }
964: if ($env{'request.role'} eq $trolecode) {
965: $tstatus='selected';
966: }
967: my $tbg;
968: if (($tstatus eq 'is')
969: || ($tstatus eq 'selected')
970: || ($tstatus eq 'future')
971: || ($env{'form.showall'})) {
972: if ($tstatus eq 'is') {
973: $tbg='LC_roles_is';
974: $possiblerole=$trolecode;
975: $countactive++;
976: } elsif ($tstatus eq 'future') {
977: $tbg='LC_roles_future';
978: $button=0;
979: $futureroles->{$trolecode} = $tstart.':'.$tend;
980: $countfuture ++;
981: } elsif ($tstatus eq 'expired') {
982: $tbg='LC_roles_expired';
983: $button=0;
984: } elsif ($tstatus eq 'will_not') {
985: $tbg='LC_roles_will_not';
986: $tremark.=&mt('Expired after logout.').' ';
987: } elsif ($tstatus eq 'selected') {
988: $tbg='LC_roles_selected';
989: $inrole=1;
990: $countactive++;
991: $tremark.=&mt('Currently selected.').' ';
992: }
993: my $trole;
994: if ($role =~ /^cr\//) {
995: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
996: if ($tremark) { $tremark.='<br />'; }
997: $tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
998: }
999: $trole=Apache::lonnet::plaintext($role);
1000: my $ttype;
1001: my $twhere;
1002: my ($tdom,$trest,$tsection)=
1003: split(/\//,Apache::lonnet::declutter($where));
1004: # First, Co-Authorship roles
1005: if (($role eq 'ca') || ($role eq 'aa')) {
1006: my $home = &Apache::lonnet::homeserver($trest,$tdom);
1007: my $allowed=0;
1008: my @ids=&Apache::lonnet::current_machine_ids();
1009: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1010: if (!$allowed) {
1011: $button=0;
1012: $switchserver='otherserver='.$home.'&role='.$trolecode;
1013: }
1014: #next if ($home eq 'no_host');
1015: $home = &Apache::lonnet::hostname($home);
1016: $ttype='Construction Space';
1017: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
1018: ': '.$tdom.'<br />'.
1019: ' '.&mt('Server').': '.$home;
1020: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1021: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
1022: $sortkey=$role."$trest:$tdom";
1023: } elsif ($role eq 'au') {
1024: # Authors
1025: my $home = &Apache::lonnet::homeserver
1026: ($env{'user.name'},$env{'user.domain'});
1027: my $allowed=0;
1028: my @ids=&Apache::lonnet::current_machine_ids();
1029: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1030: if (!$allowed) {
1031: $button=0;
1032: $switchserver='otherserver='.$home.'&role='.$trolecode;
1033: }
1034: #next if ($home eq 'no_host');
1035: $home = &Apache::lonnet::hostname($home);
1036: $ttype='Construction Space';
1037: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
1038: ': '.$home;
1039: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1040: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
1041: $sortkey=$role;
1042: } elsif ($trest) {
1043: my $tcourseid=$tdom.'_'.$trest;
1044: $ttype = &Apache::loncommon::course_type($tcourseid);
1045: $trole = &Apache::lonnet::plaintext($role,$ttype);
1046: if ($env{'course.'.$tcourseid.'.description'}) {
1047: $twhere=$env{'course.'.$tcourseid.'.description'};
1048: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1049: unless ($twhere eq &mt('Currently not available')) {
1050: $twhere.=' <span class="LC_fontsize_small">'.
1051: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1052: '</span>';
1053: }
1054: } else {
1055: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1056: if (%newhash) {
1057: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
1058: "\0".$envkey;
1059: $twhere=$newhash{'description'}.
1060: ' <span class="LC_fontsize_small">'.
1061: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1062: '</span>';
1063: $ttype = $newhash{'type'};
1064: $trole = &Apache::lonnet::plaintext($role,$ttype);
1065: } else {
1066: $twhere=&mt('Currently not available');
1067: $env{'course.'.$tcourseid.'.description'}=$twhere;
1068: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1069: $ttype = 'Unavailable';
1070: }
1071: }
1072: if ($tsection) {
1073: $twhere.='<br />'.&mt('Section').': '.$tsection;
1074: }
1075: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
1076: } elsif ($tdom) {
1077: $ttype='Domain';
1078: $twhere=$tdom;
1079: $sortkey=$role.$twhere;
1080: } else {
1081: $ttype='System';
1082: $twhere=&mt('system wide');
1083: $sortkey=$role.$twhere;
1084: }
1085: ($role_text,$role_text_end) =
1086: &build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,
1087: $advanced,$tremark,$tbg,$trole,$twhere,$tpstart,
1088: $tpend,$nochoose,$button,$switchserver,$reinit);
1089: $roletext->{$envkey}=[$role_text,$role_text_end];
1090: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
1091: $sortrole->{$sortkey}=$envkey;
1092: $roleclass->{$envkey}=$ttype;
1093: }
1094: }
1095: }
1096: return ($countactive,$countfuture,$inrole,$possiblerole);
1097: }
1098:
1099: sub role_timezone {
1100: my ($where,$timezones) = @_;
1101: my $timezone;
1102: if (ref($timezones) eq 'HASH') {
1103: if ($where =~ m{^/($match_domain)/($match_courseid)}) {
1104: my $cdom = $1;
1105: my $cnum = $2;
1106: if ($cdom && $cnum) {
1107: if (!exists($timezones->{$cdom.'_'.$cnum})) {
1108: my %timehash =
1109: &Apache::lonnet::get('environment',['timezone'],$cdom,$cnum);
1110: if ($timehash{'timezone'} eq '') {
1111: if (!exists($timezones->{$cdom})) {
1112: my %domdefaults =
1113: &Apache::lonnet::get_domain_defaults($cdom);
1114: if ($domdefaults{'timezone_def'} eq '') {
1115: $timezones->{$cdom} = 'local';
1116: } else {
1117: $timezones->{$cdom} = $domdefaults{'timezone_def'};
1118: }
1119: }
1120: $timezones->{$cdom.'_'.$cnum} = $timezones->{$cdom};
1121: } else {
1122: $timezones->{$cdom.'_'.$cnum} =
1123: &Apache::lonlocal::gettimezone($timehash{'timezone'});
1124: }
1125: }
1126: $timezone = $timezones->{$cdom.'_'.$cnum};
1127: }
1128: } else {
1129: my ($tdom) = ($where =~ m{^/($match_domain)});
1130: if ($tdom) {
1131: if (!exists($timezones->{$tdom})) {
1132: my %domdefaults = &Apache::lonnet::get_domain_defaults($tdom);
1133: if ($domdefaults{'timezone_def'} eq '') {
1134: $timezones->{$tdom} = 'local';
1135: } else {
1136: $timezones->{$tdom} = $domdefaults{'timezone_def'};
1137: }
1138: }
1139: $timezone = $timezones->{$tdom};
1140: }
1141: }
1142: if ($timezone eq 'local') {
1143: $timezone = undef;
1144: }
1145: }
1146: return $timezone;
1147: }
1148:
1149: sub roletable_headers {
1150: my ($r,$roleclass,$sortrole,$nochoose) = @_;
1151: my $doheaders;
1152: if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
1153: $r->print('<br />'
1154: .&Apache::loncommon::start_data_table()
1155: .&Apache::loncommon::start_data_table_header_row()
1156: );
1157: if (!$nochoose) { $r->print('<th> </th>'); }
1158: $r->print('<th>'.&mt('User Role').'</th>'
1159: .'<th>'.&mt('Extent').'</th>'
1160: .'<th>'.&mt('Start').'</th>'
1161: .'<th>'.&mt('End').'</th>'
1162: .&Apache::loncommon::end_data_table_header_row()
1163: );
1164: $doheaders=-1;
1165: my @roletypes = &roletypes();
1166: foreach my $type (@roletypes) {
1167: my $haverole=0;
1168: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1169: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1170: $haverole=1;
1171: }
1172: }
1173: if ($haverole) { $doheaders++; }
1174: }
1175: }
1176: return $doheaders;
1177: }
1178:
1179: sub roletypes {
1180: my @types = ('Domain','Construction Space','Course','Community','Unavailable','System');
1181: return @types;
1182: }
1183:
1184: sub print_rolerows {
1185: my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
1186: if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
1187: my @types = &roletypes();
1188: foreach my $type (@types) {
1189: my $output;
1190: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1191: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1192: if (ref($roletext) eq 'HASH') {
1193: if (ref($roletext->{$sortrole->{$which}}) eq 'ARRAY') {
1194: $output.= &Apache::loncommon::start_data_table_row().
1195: $roletext->{$sortrole->{$which}}->[0].
1196: &Apache::loncommon::end_data_table_row().
1197: &Apache::loncommon::continue_data_table_row().
1198: $roletext->{$sortrole->{$which}}->[1].
1199: &Apache::loncommon::end_data_table_row();
1200: }
1201: if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
1202: if (ref($dcroles) eq 'HASH') {
1203: if ($dcroles->{$1}) {
1204: $output .= &adhoc_roles_row($1,'');
1205: }
1206: }
1207: }
1208: }
1209: }
1210: }
1211: if ($output) {
1212: if ($doheaders > 0) {
1213: $r->print(&Apache::loncommon::start_data_table_empty_row()
1214: .'<td align="center" colspan="5">'
1215: .&mt($type)
1216: .'</td>'
1217: .&Apache::loncommon::end_data_table_empty_row()
1218: );
1219: }
1220: $r->print($output);
1221: }
1222: }
1223: }
1224: }
1225:
1226: sub findcourse_advice {
1227: my ($r) = @_;
1228: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1229: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1230: if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
1231: $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
1232: <ul>
1233: <li>'.&mt('The course has yet to be created.').'</li>
1234: <li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
1235: <li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
1236: <li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
1237: <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>
1238: </ul>');
1239: } else {
1240: $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 />');
1241: }
1242: $r->print('<h3>'.&mt('Self-Enrollment').'</h3>'.
1243: '<p>'.&mt('The [_1]Course/Community Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created, as well as any communities in the domain.','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a>',$domdesc).'<br />');
1244: $r->print(&mt('You can search for courses and communities which permit self-enrollment, if you would like to enroll in one.').'</p>');
1245: &queued_selfenrollment($r);
1246: return;
1247: }
1248:
1249: sub requestcourse_advice {
1250: my ($r) = @_;
1251: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1252: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1253: my (%can_request,%request_doms);
1254: &Apache::lonnet::check_can_request($env{'user.domain'},\%can_request,\%request_doms);
1255: if (keys(%request_doms) > 0) {
1256: my ($types,$typename) = &Apache::loncommon::course_types();
1257: if ((ref($types) eq 'ARRAY') && (ref($typename) eq 'HASH')) {
1258: $r->print('<h3>'.&mt('Request creation of a course or community').'</h3>'.
1259: '<p>'.&mt('You have rights to request the creation of courses and/or communities in the following domain(s):').'<ul>');
1260: my (@reqdoms,@reqtypes);
1261: foreach my $type (sort(keys(%request_doms))) {
1262: push(@reqtypes,$type);
1263: if (ref($request_doms{$type}) eq 'ARRAY') {
1264: my $domstr = join(', ',map { &Apache::lonnet::domain($_) } sort(@{$request_doms{$type}}));
1265: $r->print(
1266: '<li>'
1267: .&mt('[_1]'.$typename->{$type}.'[_2] in domain: [_3]',
1268: '<i>',
1269: '</i>',
1270: '<b>'.$domstr.'</b>')
1271: .'</li>'
1272: );
1273: foreach my $dom (@{$request_doms{$type}}) {
1274: unless (grep(/^\Q$dom\E/,@reqdoms)) {
1275: push(@reqdoms,$dom);
1276: }
1277: }
1278: }
1279: }
1280: my @showtypes;
1281: foreach my $type (@{$types}) {
1282: if (grep(/^\Q$type\E$/,@reqtypes)) {
1283: push(@showtypes,$type);
1284: }
1285: }
1286: my $requrl = '/adm/requestcourse';
1287: if (@reqdoms == 1) {
1288: $requrl .= '?showdom='.$reqdoms[0];
1289: }
1290: if (@showtypes > 0) {
1291: $requrl.=(($requrl=~/\?/)?'&':'?').'crstype='.$showtypes[0];
1292: }
1293: if (@reqdoms == 1 || @showtypes > 0) {
1294: $requrl .= '&state=crstype&action=new';
1295: }
1296: $r->print('</ul>'.&mt('Use the [_1]request form[_2] to submit a request for creation of a new course or community.','<a href="'.$requrl.'">','</a>').'</p>');
1297: }
1298: }
1299: return;
1300: }
1301:
1302: sub queued_selfenrollment {
1303: my ($r) = @_;
1304: my %selfenrollrequests = &Apache::lonnet::dump('selfenrollrequests');
1305: my %reqs_by_date;
1306: foreach my $item (keys(%selfenrollrequests)) {
1307: if (ref($selfenrollrequests{$item}) eq 'HASH') {
1308: if ($selfenrollrequests{$item}{'status'} eq 'request') {
1309: if ($selfenrollrequests{$item}{'timestamp'}) {
1310: push(@{$reqs_by_date{$selfenrollrequests{$item}{'timestamp'}}},$item);
1311: }
1312: }
1313: }
1314: }
1315: if (keys(%reqs_by_date)) {
1316: my $rolename = &Apache::lonnet::plaintext('st');
1317: $r->print('<b>'.&mt('Enrollment requests pending Course Coordinator approval').'</b><br />'.
1318: &Apache::loncommon::start_data_table().
1319: &Apache::loncommon::start_data_table_header_row().
1320: '<th>'.&mt('Date requested').'</th><th>'.&mt('Course title').'</th>'.
1321: '<th>'.&mt('User role').'</th><th>'.&mt('Section').'</th>'.
1322: &Apache::loncommon::end_data_table_header_row());
1323: my @sorted = sort { $a <=> $b } (keys(%reqs_by_date));
1324: foreach my $item (@sorted) {
1325: if (ref($reqs_by_date{$item}) eq 'ARRAY') {
1326: foreach my $crs (@{$reqs_by_date{$item}}) {
1327: my %courseinfo = &Apache::lonnet::coursedescription($crs);
1328: my $usec = $selfenrollrequests{$crs}{'section'};
1329: if ($usec eq '') {
1330: $usec = &mt('No section');
1331: }
1332: $r->print(&Apache::loncommon::start_data_table_row().
1333: '<td>'.&Apache::lonlocal::locallocaltime($item).'</td>'.
1334: '<td>'.$courseinfo{'description'}.'</td>'.
1335: '<td>'.$rolename.'</td><td>'.$usec.'</td>'.
1336: &Apache::loncommon::end_data_table_row());
1337: }
1338: }
1339: }
1340: $r->print(&Apache::loncommon::end_data_table());
1341: }
1342: return;
1343: }
1344:
1345: sub privileges_info {
1346: my ($which) = @_;
1347: my $output;
1348:
1349: $which ||= $env{'request.role'};
1350:
1351: foreach my $envkey (sort(keys(%env))) {
1352: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
1353:
1354: my $where=$1;
1355: my $ttype;
1356: my $twhere;
1357: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
1358: if ($trest) {
1359: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
1360: $ttype='Construction Space';
1361: $twhere='User: '.$trest.', Domain: '.$tdom;
1362: } else {
1363: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
1364: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
1365: if ($tsec) {
1366: my $sec_type = 'Section';
1367: if (exists($env{"user.role.gr.$where"})) {
1368: $sec_type = 'Group';
1369: }
1370: $twhere.=' ('.$sec_type.': '.$tsec.')';
1371: }
1372: }
1373: } elsif ($tdom) {
1374: $ttype='Domain';
1375: $twhere=$tdom;
1376: } else {
1377: $ttype='System';
1378: $twhere='/';
1379: }
1380: $output .= "\n<h3>".&mt($ttype).': '.$twhere.'</h3>'."\n<ul>";
1381: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
1382: next if (!$priv);
1383:
1384: my ($prv,$restr)=split(/\&/,$priv);
1385: my $trestr='';
1386: if ($restr ne 'F') {
1387: $trestr.=' ('.
1388: join(', ',
1389: map { &Apache::lonnet::plaintext($_) }
1390: (split('',$restr))).') ';
1391: }
1392: $output .= "\n\t".
1393: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
1394: }
1395: $output .= "\n".'</ul>';
1396: }
1397: return $output;
1398: }
1399:
1400: sub build_roletext {
1401: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit) = @_;
1402: my ($roletext,$roletext_end);
1403: my $is_dc=($trolecode =~ m/^dc\./);
1404: my $rowspan=($is_dc) ? ''
1405: : ' rowspan="2" ';
1406:
1407: unless ($nochoose) {
1408: my $buttonname=$trolecode;
1409: $buttonname=~s/\W//g;
1410: if (!$button) {
1411: if ($switchserver) {
1412: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'
1413: .'<a href="/adm/switchserver?'.$switchserver.'">'
1414: .&mt('Switch Server')
1415: .'</a></td>';
1416: } else {
1417: $roletext.=('<td'.$rowspan.' class="'.$tbg.'"> </td>');
1418: }
1419: } elsif ($tstatus eq 'is') {
1420: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'.
1421: '<input name="'.$buttonname.'" type="button" value="'.
1422: &mt('Select').'" onclick="javascript:enterrole(this.form,\''.
1423: $trolecode."','".$buttonname.'\');" /></td>';
1424: } elsif ($tryagain) {
1425: $roletext.=
1426: '<td'.$rowspan.' class="'.$tbg.'">'.
1427: '<input name="'.$buttonname.'" type="button" value="'.
1428: &mt('Try Selecting Again').'" onclick="javascript:enterrole(this.form,\''.
1429: $trolecode."','".$buttonname.'\');" /></td>';
1430: } elsif ($advanced) {
1431: $roletext.=
1432: '<td'.$rowspan.' class="'.$tbg.'">'.
1433: '<input name="'.$buttonname.'" type="button" value="'.
1434: &mt('Re-Initialize').'" onclick="javascript:enterrole(this.form,\''.
1435: $trolecode."','".$buttonname.'\');" /></td>';
1436: } elsif ($reinit) {
1437: $roletext.=
1438: '<td'.$rowspan.' class="'.$tbg.'">'.
1439: '<input name="'.$buttonname.'" type="button" value="'.
1440: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1441: $trolecode."','".$buttonname.'\');" /></td>';
1442: } else {
1443: $roletext.=
1444: '<td'.$rowspan.' class="'.$tbg.'">'.
1445: '<input name="'.$buttonname.'" type="button" value="'.
1446: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1447: $trolecode."','".$buttonname.'\');" /></td>';
1448: }
1449: }
1450: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
1451: $tremark.=&Apache::lonannounce::showday(time,1,
1452: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
1453: }
1454: $roletext.='<td>'.$trole.'</td>'
1455: .'<td>'.$twhere.'</td>'
1456: .'<td>'.$tpstart.'</td>'
1457: .'<td>'.$tpend.'</td>';
1458: if (!$is_dc) {
1459: $roletext_end = '<td colspan="4">'.
1460: $tremark.' '.
1461: '</td>';
1462: }
1463: return ($roletext,$roletext_end);
1464: }
1465:
1466: sub check_needs_switchserver {
1467: my ($possiblerole) = @_;
1468: my $needs_switchserver;
1469: my ($role,$where) = split(/\./,$possiblerole,2);
1470: my (undef,$tdom,$twho) = split(/\//,$where);
1471: my ($server_status,$home);
1472: if (($role eq 'ca') || ($role eq 'aa')) {
1473: ($server_status,$home) = &check_author_homeserver($twho,$tdom);
1474: } else {
1475: ($server_status,$home) = &check_author_homeserver($env{'user.name'},
1476: $env{'user.domain'});
1477: }
1478: if ($server_status eq 'switchserver') {
1479: $needs_switchserver = 1;
1480: }
1481: return $needs_switchserver;
1482: }
1483:
1484: sub check_author_homeserver {
1485: my ($uname,$udom)=@_;
1486: if (($uname eq '') || ($udom eq '')) {
1487: return ('fail','');
1488: }
1489: my $home = &Apache::lonnet::homeserver($uname,$udom);
1490: if (&Apache::lonnet::host_domain($home) ne $udom) {
1491: return ('fail',$home);
1492: }
1493: my @ids=&Apache::lonnet::current_machine_ids();
1494: if (grep(/^\Q$home\E$/,@ids)) {
1495: return ('ok',$home);
1496: } else {
1497: return ('switchserver',$home);
1498: }
1499: }
1500:
1501: sub check_fordc {
1502: my ($dcroles,$then) = @_;
1503: my $numdc = 0;
1504: if ($env{'user.adv'}) {
1505: foreach my $envkey (sort keys %env) {
1506: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
1507: my $dcdom = $1;
1508: my $livedc = 1;
1509: my ($tstart,$tend)=split(/\./,$env{$envkey});
1510: if ($tstart && $tstart>$then) { $livedc = 0; }
1511: if ($tend && $tend <$then) { $livedc = 0; }
1512: if ($livedc) {
1513: $$dcroles{$dcdom} = $envkey;
1514: $numdc++;
1515: }
1516: }
1517: }
1518: }
1519: return $numdc;
1520: }
1521:
1522: sub adhoc_course_role {
1523: my ($refresh,$then) = @_;
1524: my ($cdom,$cnum,$crstype);
1525: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1526: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1527: $crstype = &Apache::loncommon::course_type();
1528: if (&check_forcc($cdom,$cnum,$refresh,$then,$crstype)) {
1529: my $setprivs;
1530: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
1531: $setprivs = 1;
1532: } else {
1533: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
1534: if (($start && ($start>$refresh || $start == -1)) ||
1535: ($end && $end<$then)) {
1536: $setprivs = 1;
1537: }
1538: }
1539: if ($setprivs) {
1540: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
1541: my $role = $1;
1542: my $custom_role = $2;
1543: my $usec = $3;
1544: if ($role eq 'cr') {
1545: if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
1546: $role .= $custom_role;
1547: } else {
1548: return;
1549: }
1550: }
1551: my (%userroles,%newrole,%newgroups,%group_privs);
1552: my %cgroups =
1553: &Apache::lonnet::get_active_groups($env{'user.domain'},
1554: $env{'user.name'},$cdom,$cnum);
1555: foreach my $group (keys(%cgroups)) {
1556: $group_privs{$group} =
1557: $env{'user.priv.cc./'.$cdom.'/'.$cnum.'./'.$cdom.'/'.$cnum.'/'.$group};
1558: }
1559: $newgroups{'/'.$cdom.'/'.$cnum} = \%group_privs;
1560: my $area = '/'.$cdom.'/'.$cnum;
1561: my $spec = $role.'.'.$area;
1562: if ($usec ne '') {
1563: $spec .= '/'.$usec;
1564: $area .= '/'.$usec;
1565: }
1566: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1567: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,\%newgroups);
1568: my $adhocstart = $refresh-1;
1569: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1570: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1571: }
1572: }
1573: }
1574: return;
1575: }
1576:
1577: sub check_forcc {
1578: my ($cdom,$cnum,$refresh,$then,$crstype) = @_;
1579: my ($is_cc,$ccrole);
1580: if ($crstype eq 'Community') {
1581: $ccrole = 'co';
1582: } else {
1583: $ccrole = 'cc';
1584: }
1585: if ($cdom ne '' && $cnum ne '') {
1586: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1587: my $envkey = 'user.role.'.$ccrole.'./'.$cdom.'/'.$cnum;
1588: if (defined($env{$envkey})) {
1589: $is_cc = 1;
1590: my ($tstart,$tend)=split(/\./,$env{$envkey});
1591: if ($tstart && $tstart>$refresh) { $is_cc = 0; }
1592: if ($tend && $tend <$then) { $is_cc = 0; }
1593: }
1594: }
1595: }
1596: return $is_cc;
1597: }
1598:
1599: sub courselink {
1600: my ($dcdom,$rowtype) = @_;
1601: my $courseform=&Apache::loncommon::selectcourse_link
1602: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1603: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1604: $dcdom,$dcdom,undef,'Course/Community');
1605: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1606: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1607: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1608: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1609: return $courseform.$hiddenitems;
1610: }
1611:
1612: sub coursepick_jscript {
1613: my %lt = &Apache::lonlocal::texthash(
1614: 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.",
1615: youc => 'You can only use this screen to select courses and communities in the current domain.',
1616: );
1617: my $verify_script = <<"END";
1618: <script type="text/javascript">
1619: // <![CDATA[
1620: function verifyCoursePick(caller) {
1621: var numbutton = getIndex(caller)
1622: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1623: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1624: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1625: if (pickedCourse != '') {
1626: if (numbutton != -1) {
1627: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1628: document.rolechoice.elements[numbutton+1].name = courseTarget
1629: document.rolechoice.submit()
1630: }
1631: }
1632: else {
1633: alert("$lt{'plsu'}");
1634: }
1635: }
1636: else {
1637: alert("$lt{'youc'}")
1638: }
1639: }
1640: function getIndex(caller) {
1641: for (var i=0;i<document.rolechoice.elements.length;i++) {
1642: if (document.rolechoice.elements[i] == caller) {
1643: return i;
1644: }
1645: }
1646: return -1;
1647: }
1648: // ]]>
1649: </script>
1650: END
1651: return $verify_script;
1652: }
1653:
1654: sub coauthorlink {
1655: my ($dcdom,$rowtype) = @_;
1656: my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
1657: my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
1658: return $coauthorform.$hiddenitems;
1659: }
1660:
1661: sub display_cc_role {
1662: my $rolekey = shift;
1663: my ($roletext,$roletext_end);
1664: my $advanced = $env{'user.adv'};
1665: my $tryagain = $env{'form.tryagain'};
1666: unless ($rolekey =~/^error\:/) {
1667: if ($rolekey =~ m{^user\.role\.(cc|co)\./($match_domain)/($match_courseid)$}) {
1668: my $ccrole = $1;
1669: my $tcourseid = $2.'_'.$3;
1670: my $trolecode = $1.'./'.$2.'/'.$3;
1671: my $twhere;
1672: my $ttype;
1673: my $tbg='LC_roles_is';
1674: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1675: if (%newhash) {
1676: $twhere=$newhash{'description'}.
1677: ' <span style="LC_fontsize_small">'.
1678: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1).
1679: '</span>';
1680: $ttype = $newhash{'type'};
1681: } else {
1682: $twhere=&mt('Currently not available');
1683: $env{'course.'.$tcourseid.'.description'}=$twhere;
1684: }
1685: my $trole = &Apache::lonnet::plaintext($ccrole,$ttype);
1686: $twhere.="<br />".&mt('Domain').":".$1;
1687: ($roletext,$roletext_end) = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$trole,$twhere,'','','',1,'');
1688: }
1689: }
1690: return ($roletext,$roletext_end);
1691: }
1692:
1693: sub adhoc_roles_row {
1694: my ($dcdom,$rowtype) = @_;
1695: my $output = &Apache::loncommon::continue_data_table_row()
1696: .' <td colspan="5">'
1697: .&mt('[_1]Ad hoc[_2] roles in domain [_3] --'
1698: ,'<span class="LC_cusr_emph">','</span>',$dcdom)
1699: .' ';
1700: my $selectcclink = &courselink($dcdom,$rowtype);
1701: my $ccrole = &Apache::lonnet::plaintext('co',undef,undef,1);
1702: my $carole = &Apache::lonnet::plaintext('ca');
1703: my $selectcalink = &coauthorlink($dcdom,$rowtype);
1704: $output.=$ccrole.': '.$selectcclink
1705: .' | '.$carole.': '.$selectcalink
1706: .&Apache::loncommon::end_data_table_row();
1707: return $output;
1708: }
1709:
1710: sub recent_filename {
1711: my $area=shift;
1712: return 'nohist_recent_'.&escape($area);
1713: }
1714:
1715: sub courseloadpage {
1716: my ($courseid) = @_;
1717: my $startpage;
1718: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1719: [$courseid.':courseinit']);
1720: my ($tmp) = %entry_settings;
1721: unless ($tmp =~ /^error: 2 /) {
1722: $startpage = $entry_settings{$courseid.':courseinit'};
1723: }
1724: if ($startpage eq '') {
1725: if (exists($env{'environment.course_init_display'})) {
1726: $startpage = $env{'environment.course_init_display'};
1727: }
1728: }
1729: return $startpage;
1730: }
1731:
1732: 1;
1733: __END__
1734:
1735: =head1 NAME
1736:
1737: Apache::lonroles - User Roles Screen
1738:
1739: =head1 SYNOPSIS
1740:
1741: Invoked by /etc/httpd/conf/srm.conf:
1742:
1743: <Location /adm/roles>
1744: PerlAccessHandler Apache::lonacc
1745: SetHandler perl-script
1746: PerlHandler Apache::lonroles
1747: ErrorDocument 403 /adm/login
1748: ErrorDocument 500 /adm/errorhandler
1749: </Location>
1750:
1751: =head1 OVERVIEW
1752:
1753: =head2 Choosing Roles
1754:
1755: C<lonroles> is a handler that allows a user to switch roles in
1756: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1757: default role that a user has before selecting a role, as widely as
1758: possible, but certain handlers for example need specification which
1759: course they should act on, etc. Both in this scenario, and when the
1760: handler determines via C<lonnet>'s C<&allowed> function that a certain
1761: action is not allowed, C<lonroles> is used as error handler. This
1762: allows the user to select another role which may have permission to do
1763: what they were trying to do. C<lonroles> can also be accessed via the
1764: B<CRS> button in the Remote Control.
1765:
1766: =begin latex
1767:
1768: \begin{figure}
1769: \begin{center}
1770: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1771: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1772: \end{center}
1773: \end{figure}
1774:
1775: =end latex
1776:
1777: =head2 Role Initialization
1778:
1779: 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.
1780:
1781: =head1 INTRODUCTION
1782:
1783: This module enables a user to select what role he wishes to
1784: operate under (instructor, student, teaching assistant, course
1785: coordinator, etc). These roles are pre-established by the actions
1786: of upper-level users.
1787:
1788: This is part of the LearningOnline Network with CAPA project
1789: described at http://www.lon-capa.org.
1790:
1791: =head1 HANDLER SUBROUTINE
1792:
1793: This routine is called by Apache and mod_perl.
1794:
1795: =over 4
1796:
1797: =item *
1798:
1799: Roles Initialization (yes/no)
1800:
1801: =item *
1802:
1803: Get Error Message from Environment
1804:
1805: =item *
1806:
1807: Who is this?
1808:
1809: =item *
1810:
1811: Generate Page Output
1812:
1813: =item *
1814:
1815: Choice or no choice
1816:
1817: =item *
1818:
1819: Table
1820:
1821: =item *
1822:
1823: Privileges
1824:
1825: =back
1826:
1827: =cut
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