1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.240.2.5 2009/12/24 18:28:54 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: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
453: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
454: my ($furl,$ferr)=
455: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
456: if (($env{'form.orgurl'}) &&
457: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
458: my $dest=$env{'form.orgurl'};
459: if ($env{'form.symb'}) {
460: if ($dest =~ /\?/) {
461: $dest .= '&';
462: } else {
463: $dest .= '?'
464: }
465: $dest .= 'symb='.$env{'form.symb'};
466: }
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:
486: if (($ferr) && ($tadv)) {
487: &error_page($r,$ferr,$furl);
488: } else {
489: # Check to see if the user is a CC entering a course
490: # for the first time
491: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
492: if (substr($courseid, 0, 1) eq '/') {
493: $courseid = substr($courseid, 1);
494: }
495: $courseid =~ s/\//_/;
496: if (($cdom ne 'gcitest') && (($role eq 'cc') || ($role eq 'co'))
497: && ($env{'course.' . $courseid .'.course.helper.not.run'})) {
498: $furl = "/adm/helper/course.initialization.helper";
499: # Send the user to the course they selected
500: } elsif ($env{'request.course.id'}) {
501: if ($env{'form.destinationurl'}) {
502: my $dest = $env{'form.destinationurl'};
503: if ($env{'form.destsymb'} ne '') {
504: my $esc_symb = &HTML::Entities::encode($env{'form.destsymb'},'"<>&');
505: $dest .= '?symb='.$esc_symb;
506: }
507: &redirect_user($r,&mt('Entering [_1]',
508: $env{'course.'.$courseid.'.description'}),
509: $dest,$msg,
510: $env{'environment.remotenavmap'});
511: return OK;
512: }
513: if (&Apache::lonnet::allowed('whn',
514: $env{'request.course.id'})
515: || &Apache::lonnet::allowed('whn',
516: $env{'request.course.id'}.'/'
517: .$env{'request.course.sec'})
518: ) {
519: my $startpage = &courseloadpage($courseid);
520: unless (($startpage eq 'firstres') || ($cdom eq 'gcitest')) {
521: $msg = &mt('Entering [_1] ...',
522: $env{'course.'.$courseid.'.description'});
523: &redirect_user($r,&mt('New in course'),
524: '/adm/whatsnew?refpage=start',$msg,
525: $env{'environment.remotenavmap'});
526: return OK;
527: }
528: }
529: }
530: # Are we allowed to look at the first resource?
531: if ($furl !~ m|^/adm/|) {
532: # Guess not ...
533: $furl=&Apache::lonpageflip::first_accessible_resource();
534: }
535: if (($cdom eq 'gcitest') && ($custommenu)) {
536: $furl = '/adm/navmaps';
537: }
538: $msg = &mt('Entering [_1] ...',
539: $env{'course.'.$courseid.'.description'});
540: &redirect_user($r,&mt('Entering [_1]',
541: $env{'course.'.$courseid.'.description'}),
542: $furl,$msg,
543: $env{'environment.remotenavmap'});
544: }
545: return OK;
546: }
547: }
548: #
549: # Send the user to the construction space they selected
550: if ($role =~ /^(au|ca|aa)$/) {
551: my $redirect_url = '/priv/';
552: if ($role eq 'au') {
553: $redirect_url.=$env{'user.name'};
554: } else {
555: $where =~ /\/(.*)$/;
556: $redirect_url .= $1;
557: }
558: $redirect_url .= '/';
559: &redirect_user($r,&mt('Entering Construction Space'),
560: $redirect_url);
561: return OK;
562: }
563: if ($role eq 'dc') {
564: my $redirect_url = '/adm/menu/';
565: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
566: $redirect_url);
567: return OK;
568: }
569: if ($role eq 'sc') {
570: my $redirect_url = '/adm/grades?command=scantronupload';
571: &redirect_user($r,&mt('Loading Data Upload Page'),
572: $redirect_url);
573: return OK;
574: }
575: }
576: }
577: }
578: }
579:
580: # =============================================================== No Roles Init
581:
582: &Apache::loncommon::content_type($r,'text/html');
583: &Apache::loncommon::no_cache($r);
584: $r->send_http_header;
585: return OK if $r->header_only;
586:
587: my ($crumbtext,$pagetitle,$recent,$show_course);
588: my $noscript='<span class="LC_error">'.&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.').'<br />'.&mt('As this is not the case, most functionality in the system will be unavailable.').'</span><br />';
589: if ($custommenu) {
590: my $start_page = &Apache::loncommon::start_page('Main Menu',undef,
591: {'bread_crumbs' => 1});
592: $r->print(<<"ENDCUSTOM");
593: $start_page
594: <br />
595: <noscript>
596: $noscript
597: </noscript>
598: ENDCUSTOM
599: } else {
600: $crumbtext = 'User Roles';
601: $pagetitle = 'My Roles';
602: $recent = &mt('Recent Roles');
603: $show_course=&Apache::loncommon::show_course();
604: if ($show_course) {
605: $crumbtext = 'Courses';
606: $pagetitle = 'My Courses';
607: $recent = &mt('Recent Courses');
608: }
609: my $brcrum =[{href=>"/adm/roles",text=>$crumbtext}];
610: my $swinfo=&Apache::lonmenu::rawconfig();
611: my $start_page=&Apache::loncommon::start_page($pagetitle,undef,{bread_crumbs=>$brcrum});
612: my $standby=&mt('Role selected. Please stand by.');
613: $standby=~s/\n/\\n/g;
614: $r->print(<<ENDHEADER);
615: $start_page
616: <br />
617: <noscript>
618: $noscript
619: </noscript>
620: <script type="text/javascript">
621: // <![CDATA[
622: $swinfo
623: window.focus();
624:
625: active=true;
626:
627: function enterrole (thisform,rolecode,buttonname) {
628: if (active) {
629: active=false;
630: document.title='$standby';
631: window.status='$standby';
632: thisform.newrole.value=rolecode;
633: thisform.submit();
634: } else {
635: alert('$standby');
636: }
637: }
638: // ]]>
639: </script>
640: ENDHEADER
641: }
642:
643: # ------------------------------------------ Get Error Message from Environment
644:
645: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
646: if ($env{'user.error.msg'}) {
647: $r->log_reason(
648: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
649: }
650:
651: # ------------------------------------------------- Can this user re-init, etc?
652:
653: my $advanced=$env{'user.adv'};
654: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
655: my $tryagain=$env{'form.tryagain'};
656: my $reinit=$env{'user.reinit'};
657: delete $env{'user.reinit'};
658:
659: # -------------------------------------------------------- Generate Page Output
660: # --------------------------------------------------------------- Error Header?
661: if ($error) {
662: $r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
663: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
664: if ($priv ne '') {
665: $r->print(&mt('Access : ').&Apache::lonnet::plaintext($priv)."\n");
666: }
667: if ($fn ne '') {
668: $r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
669: }
670: if ($msg ne '') {
671: $r->print(&mt('Action : ').$msg."\n");
672: }
673: $r->print("</pre><hr />");
674: my $url=$fn;
675: my $last;
676: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
677: &GDBM_READER(),0640)) {
678: $last=$hash{'last_known'};
679: untie(%hash);
680: }
681: if ($last) { $fn.='?symb='.&escape($last); }
682:
683: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
684: &Apache::lonenc::check_encrypt($fn));
685: } else {
686: if ($env{'user.error.msg'}) {
687: if ($reinit) {
688: $r->print(
689: '<h3><span class="LC_error">'.
690: &mt('As your session file for the course or community has expired, you will need to re-select it.').'</span></h3>');
691: } else {
692: $r->print(
693: '<h3><span class="LC_error">'.
694: &mt('You need to choose another user role or enter a specific course or community for this function.').
695: '</span></h3>');
696: }
697: }
698: }
699: # -------------------------------------------------------- Choice or no choice?
700: if ($nochoose) {
701: $r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
702: &mt('This action is currently not authorized.').'</span>'.
703: &Apache::loncommon::end_page());
704: return OK;
705: } else {
706: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
707: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
708: }
709: unless ($custommenu) {
710: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
711: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
712: $r->print('<input type="hidden" name="selectrole" value="1" />');
713: $r->print('<input type="hidden" name="newrole" value="" />');
714: }
715: }
716:
717: my (%roletext,%sortrole,%roleclass,%futureroles,%timezones);
718: my ($countactive,$countfuture,$inrole,$possiblerole) =
719: &gather_roles($then,$refresh,$now,$reinit,$nochoose,\%roletext,\%sortrole,\%roleclass,
720: \%futureroles,\%timezones);
721:
722: $refresh = $now;
723: &Apache::lonnet::appenv({'user.refresh.time' => $refresh});
724: if ($custommenu) {
725: if ($env{'form.destinationurl'} eq '/adm/gci_info') {
726: $r->print(&gci_info_page()).
727: &Apache::loncommon::end_page();
728: return OK;
729: }
730: my %courses = &Apache::loncommon::existing_gcitest_courses();
731: $env{'browser.interface'}='faketextual';
732: $env{'environment.remote'}='off';
733: my $numcourses = keys(%courses);
734: my $switcher;
735: if ($numcourses > 0) {
736: $switcher = &Apache::lonmainmenu::gcitest_switcher(%courses);
737: my $current;
738: if ($env{'request.course.id'}) {
739: $current = 'cc./'.$env{'course.'.$env{'request.course.id'}.'.domain'}.
740: '/'.$env{'course.'.$env{'request.course.id'}.'.num'};
741: }
742: my $switcher_js = &Apache::lonmainmenu::gcitest_switcher_js($current,$numcourses);
743: $r->print(<<"ENDSCRIPT");
744: <script type="text/javascript">
745: // <![CDATA[
746: $switcher_js
747: // ]]>
748: </script>
749: ENDSCRIPT
750: }
751: $r->print(&Apache::lonmenu::inlinemenu('gcicustom',$switcher).
752: &Apache::loncommon::end_page());
753: return OK;
754: }
755: if ($env{'user.adv'}) {
756: $r->print('<p><label><input type="checkbox" name="showall"');
757: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
758: $r->print(' />'.&mt('Show all roles').'</label>'
759: .' <input type="submit" value="'.&mt('Update display').'" />'
760: .'</p>');
761: } else {
762: if ($countactive > 0) {
763: &queued_selfenrollment($r);
764: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
765: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
766: $r->print(
767: '<p>'
768: .&mt('[_1]Visit the [_2]Course/Community Catalog[_3]'
769: .' to view all [_4] LON-CAPA courses and communities.'
770: ,'<b>'
771: ,'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
772: ,'</a></b>',$domdesc)
773: .'<br />'
774: .&mt('If a course or community is [_1]not[_2] in your list of current courses and communities below,'
775: .' you may be able to enroll if self-enrollment is permitted.'
776: ,'<b>','</b>')
777: .'</p>'
778: );
779: }
780: }
781:
782: # No active roles
783: if ($countactive==0) {
784: if ($inrole) {
785: $r->print('<h2>'.&mt('Currently no additional roles, courses or communities').'</h2>');
786: } else {
787: $r->print('<h2>'.&mt('Currently no active roles, courses or communities').'</h2>');
788: }
789: &findcourse_advice($r);
790: &requestcourse_advice($r);
791: $r->print('</form>');
792: if ($countfuture) {
793: $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
794: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
795: $nochoose);
796: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
797: \%roletext);
798: my $tremark='';
799: my $tbg;
800: if ($env{'request.role'} eq 'cm') {
801: $tbg="LC_roles_selected";
802: $tremark=&mt('Currently selected.').' ';
803: } else {
804: $tbg="LC_roles_is";
805: }
806: $r->print(&Apache::loncommon::start_data_table_row()
807: .'<td class="'.$tbg.'"> </td>'
808: .'<td colspan="3">'
809: .&mt('No role specified')
810: .'</td>'
811: .'<td>'.$tremark.' </td>'
812: .&Apache::loncommon::end_data_table_row()
813: );
814:
815: $r->print(&Apache::loncommon::end_data_table());
816: }
817: $r->print(&Apache::loncommon::end_page());
818: return OK;
819: } elsif ($countactive==1) { # Is there only one choice?
820: my $needs_switchserver;
821: if ($env{'user.author'}) {
822: $needs_switchserver = &check_needs_switchserver($possiblerole);
823: }
824: if ((!$needs_switchserver) && ($env{'request.role'} eq 'cm')) {
825: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
826: '<input type="hidden" name="'.$possiblerole.'" value="1" />'.
827: '<noscript><br /><input type="submit" name="submit" value="'.&mt('Continue').'" /></noscript>');
828: $r->print("</form>\n");
829: $r->rflush();
830: $r->print('<script type="text/javascript">document.forms.rolechoice.submit();</script>');
831: $r->print(&Apache::loncommon::end_page());
832: return OK;
833: }
834: if ($needs_switchserver) {
835: $r->print("<h2>".&mt('Server Switch Required')."</h2>\n".
836: &mt('Construction Space access is only available from '.
837: 'the home server of the corresponding Author.').'<br />'.
838: &mt("Click the 'Switch Server' link to go there.").'<br />');
839: }
840: }
841: # ----------------------------------------------------------------------- Table
842: unless ((!&Apache::loncommon::show_course()) || ($nochoose) || ($countactive==1)) {
843: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
844: }
845: if ($env{'form.destinationurl'}) {
846: $r->print('<input type="hidden" name="destinationurl" value="'.
847: $env{'form.destinationurl'}.'" />');
848: if ($env{'form.destsymb'} ne '') {
849: $r->print('<input type="hidden" name="destsymb" value="'.
850: $env{'form.destsymb'}.'" />');
851: }
852: }
853: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
854: if ($env{'environment.recentroles'}) {
855: my %recent_roles =
856: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
857: my $output='';
858: foreach (sort(keys(%recent_roles))) {
859: if (ref($roletext{'user.role.'.$_}) eq 'ARRAY') {
860: $output.= &Apache::loncommon::start_data_table_row().
861: $roletext{'user.role.'.$_}->[0].
862: &Apache::loncommon::end_data_table_row().
863: &Apache::loncommon::continue_data_table_row().
864: $roletext{'user.role.'.$_}->[1].
865: &Apache::loncommon::end_data_table_row();
866: if ($_ =~ m-dc\./($match_domain)/-
867: && $dcroles{$1}) {
868: $output .= &adhoc_roles_row($1,'recent');
869: }
870: } elsif ($numdc > 0) {
871: unless ($_ =~/^error\:/) {
872: $output.=&display_cc_role('user.role.'.$_);
873: }
874: }
875: }
876: if ($output) {
877: $r->print(&Apache::loncommon::start_data_table_empty_row()
878: .'<td align="center" colspan="5">'
879: .$recent
880: .'</td>'
881: .&Apache::loncommon::end_data_table_empty_row()
882: );
883: $r->print($output);
884: $doheaders ++;
885: }
886: }
887:
888: if ($numdc > 0) {
889: $r->print(&coursepick_jscript());
890: $r->print(&Apache::loncommon::coursebrowser_javascript().
891: &Apache::loncommon::authorbrowser_javascript());
892: }
893: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
894: if ($countactive > 1) {
895: my $tremark='';
896: my $tbg;
897: if ($env{'request.role'} eq 'cm') {
898: $tbg="LC_roles_selected";
899: $tremark=&mt('Currently selected.').' ';
900: } else {
901: $tbg="LC_roles_is";
902: }
903: $r->print(&Apache::loncommon::start_data_table_row());
904: unless ($nochoose) {
905: if ($env{'request.role'} ne 'cm') {
906: $r->print('<td class="'.$tbg.'"><input type="submit" value="'.
907: &mt('Select').'" name="cm" /></td>');
908: } else {
909: $r->print('<td class="'.$tbg.'"> </td>');
910: }
911: }
912: $r->print('<td colspan="3">'
913: .&mt('No role specified')
914: .'</td>'
915: .'<td>'.$tremark.' </td>'
916: .&Apache::loncommon::end_data_table_row()
917: );
918: }
919: $r->print(&Apache::loncommon::end_data_table());
920: unless ($nochoose) {
921: $r->print("</form>\n");
922: }
923: # ------------------------------------------------------------ Privileges Info
924: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
925: $r->print('<hr /><h2>'.&mt('Current Privileges').'</h2>');
926: $r->print(&privileges_info());
927: }
928: $r->print(&Apache::lonnet::getannounce());
929: if ($advanced) {
930: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
931: $r->print('<p><small><i>'
932: .&mt('This LON-CAPA server is version [_1]',$r->dir_config('lonVersion'))
933: .'</i><br />'
934: .'<a href="/adm/logout">'.&mt('Logout').'</a> '
935: .'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
936: .&mt('Course/Community Catalog')
937: .'</a></small></p>');
938: }
939: $r->print(&Apache::loncommon::end_page());
940: return OK;
941: }
942:
943: sub gci_info_page {
944: return <<"END";
945: <h2>Welcome to the Geoscience Concept Inventory WebCenter</h2>
946: <p>
947: Use the tabs to navigate the WebCenter and...
948: <ul>
949: <li>Review and comment on existing GCI questions</li>
950: <li>Submit a GCI question of your own</li>
951: <li>Create an online test for your students</li>
952: </ul>
953: </p>
954: <p>For more information about writing and reviewing Concept Inventory questions
955: please refer to the <a href="/res/gci/gci/internal/pdfs/GCIWorkbook.pdf">GCI Workbook</a>.
956:
957: END
958: }
959:
960: sub gather_roles {
961: my ($then,$refresh,$now,$reinit,$nochoose,$roletext,$sortrole,$roleclass,$futureroles,$timezones) = @_;
962: my ($countactive,$countfuture,$inrole,$possiblerole) = (0,0,0,'');
963: my $advanced = $env{'user.adv'};
964: my $tryagain = $env{'form.tryagain'};
965: foreach my $envkey (sort(keys(%env))) {
966: my $button = 1;
967: my $switchserver='';
968: my ($role_text,$role_text_end,$sortkey);
969: if ($envkey=~/^user\.role\./) {
970: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
971: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
972: \$trolecode,\$tstatus,\$tstart,\$tend);
973: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
974: my $timezone = &role_timezone($where,$timezones);
975: $tremark='';
976: $tpstart=' ';
977: $tpend=' ';
978: if ($tstart) {
979: $tpstart=&Apache::lonlocal::locallocaltime($tstart,$timezone);
980: }
981: if ($tend) {
982: $tpend=&Apache::lonlocal::locallocaltime($tend,$timezone);
983: }
984: if ($env{'request.role'} eq $trolecode) {
985: $tstatus='selected';
986: }
987: my $tbg;
988: if (($tstatus eq 'is')
989: || ($tstatus eq 'selected')
990: || ($tstatus eq 'future')
991: || ($env{'form.showall'})) {
992: if ($tstatus eq 'is') {
993: $tbg='LC_roles_is';
994: $possiblerole=$trolecode;
995: $countactive++;
996: } elsif ($tstatus eq 'future') {
997: $tbg='LC_roles_future';
998: $button=0;
999: $futureroles->{$trolecode} = $tstart.':'.$tend;
1000: $countfuture ++;
1001: } elsif ($tstatus eq 'expired') {
1002: $tbg='LC_roles_expired';
1003: $button=0;
1004: } elsif ($tstatus eq 'will_not') {
1005: $tbg='LC_roles_will_not';
1006: $tremark.=&mt('Expired after logout.').' ';
1007: } elsif ($tstatus eq 'selected') {
1008: $tbg='LC_roles_selected';
1009: $inrole=1;
1010: $countactive++;
1011: $tremark.=&mt('Currently selected.').' ';
1012: }
1013: my $trole;
1014: if ($role =~ /^cr\//) {
1015: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
1016: if ($tremark) { $tremark.='<br />'; }
1017: $tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
1018: }
1019: $trole=Apache::lonnet::plaintext($role);
1020: my $ttype;
1021: my $twhere;
1022: my ($tdom,$trest,$tsection)=
1023: split(/\//,Apache::lonnet::declutter($where));
1024: # First, Co-Authorship roles
1025: if (($role eq 'ca') || ($role eq 'aa')) {
1026: my $home = &Apache::lonnet::homeserver($trest,$tdom);
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: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
1038: ': '.$tdom.'<br />'.
1039: ' '.&mt('Server').': '.$home;
1040: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1041: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
1042: $sortkey=$role."$trest:$tdom";
1043: } elsif ($role eq 'au') {
1044: # Authors
1045: my $home = &Apache::lonnet::homeserver
1046: ($env{'user.name'},$env{'user.domain'});
1047: my $allowed=0;
1048: my @ids=&Apache::lonnet::current_machine_ids();
1049: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1050: if (!$allowed) {
1051: $button=0;
1052: $switchserver='otherserver='.$home.'&role='.$trolecode;
1053: }
1054: #next if ($home eq 'no_host');
1055: $home = &Apache::lonnet::hostname($home);
1056: $ttype='Construction Space';
1057: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
1058: ': '.$home;
1059: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1060: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
1061: $sortkey=$role;
1062: } elsif ($trest) {
1063: my $tcourseid=$tdom.'_'.$trest;
1064: $ttype = &Apache::loncommon::course_type($tcourseid);
1065: $trole = &Apache::lonnet::plaintext($role,$ttype);
1066: if ($env{'course.'.$tcourseid.'.description'}) {
1067: $twhere=$env{'course.'.$tcourseid.'.description'};
1068: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1069: unless ($twhere eq &mt('Currently not available')) {
1070: $twhere.=' <span class="LC_fontsize_small">'.
1071: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1072: '</span>';
1073: }
1074: } else {
1075: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1076: if (%newhash) {
1077: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
1078: "\0".$envkey;
1079: $twhere=$newhash{'description'}.
1080: ' <span class="LC_fontsize_small">'.
1081: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1082: '</span>';
1083: $ttype = $newhash{'type'};
1084: $trole = &Apache::lonnet::plaintext($role,$ttype);
1085: } else {
1086: $twhere=&mt('Currently not available');
1087: $env{'course.'.$tcourseid.'.description'}=$twhere;
1088: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1089: $ttype = 'Unavailable';
1090: }
1091: }
1092: if ($tsection) {
1093: $twhere.='<br />'.&mt('Section').': '.$tsection;
1094: }
1095: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
1096: } elsif ($tdom) {
1097: $ttype='Domain';
1098: $twhere=$tdom;
1099: $sortkey=$role.$twhere;
1100: } else {
1101: $ttype='System';
1102: $twhere=&mt('system wide');
1103: $sortkey=$role.$twhere;
1104: }
1105: ($role_text,$role_text_end) =
1106: &build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,
1107: $advanced,$tremark,$tbg,$trole,$twhere,$tpstart,
1108: $tpend,$nochoose,$button,$switchserver,$reinit);
1109: $roletext->{$envkey}=[$role_text,$role_text_end];
1110: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
1111: $sortrole->{$sortkey}=$envkey;
1112: $roleclass->{$envkey}=$ttype;
1113: }
1114: }
1115: }
1116: return ($countactive,$countfuture,$inrole,$possiblerole);
1117: }
1118:
1119: sub role_timezone {
1120: my ($where,$timezones) = @_;
1121: my $timezone;
1122: if (ref($timezones) eq 'HASH') {
1123: if ($where =~ m{^/($match_domain)/($match_courseid)}) {
1124: my $cdom = $1;
1125: my $cnum = $2;
1126: if ($cdom && $cnum) {
1127: if (!exists($timezones->{$cdom.'_'.$cnum})) {
1128: my %timehash =
1129: &Apache::lonnet::get('environment',['timezone'],$cdom,$cnum);
1130: if ($timehash{'timezone'} eq '') {
1131: if (!exists($timezones->{$cdom})) {
1132: my %domdefaults =
1133: &Apache::lonnet::get_domain_defaults($cdom);
1134: if ($domdefaults{'timezone_def'} eq '') {
1135: $timezones->{$cdom} = 'local';
1136: } else {
1137: $timezones->{$cdom} = $domdefaults{'timezone_def'};
1138: }
1139: }
1140: $timezones->{$cdom.'_'.$cnum} = $timezones->{$cdom};
1141: } else {
1142: $timezones->{$cdom.'_'.$cnum} =
1143: &Apache::lonlocal::gettimezone($timehash{'timezone'});
1144: }
1145: }
1146: $timezone = $timezones->{$cdom.'_'.$cnum};
1147: }
1148: } else {
1149: my ($tdom) = ($where =~ m{^/($match_domain)});
1150: if ($tdom) {
1151: if (!exists($timezones->{$tdom})) {
1152: my %domdefaults = &Apache::lonnet::get_domain_defaults($tdom);
1153: if ($domdefaults{'timezone_def'} eq '') {
1154: $timezones->{$tdom} = 'local';
1155: } else {
1156: $timezones->{$tdom} = $domdefaults{'timezone_def'};
1157: }
1158: }
1159: $timezone = $timezones->{$tdom};
1160: }
1161: }
1162: if ($timezone eq 'local') {
1163: $timezone = undef;
1164: }
1165: }
1166: return $timezone;
1167: }
1168:
1169: sub roletable_headers {
1170: my ($r,$roleclass,$sortrole,$nochoose) = @_;
1171: my $doheaders;
1172: if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
1173: $r->print('<br />'
1174: .&Apache::loncommon::start_data_table()
1175: .&Apache::loncommon::start_data_table_header_row()
1176: );
1177: if (!$nochoose) { $r->print('<th> </th>'); }
1178: $r->print('<th>'.&mt('User Role').'</th>'
1179: .'<th>'.&mt('Extent').'</th>'
1180: .'<th>'.&mt('Start').'</th>'
1181: .'<th>'.&mt('End').'</th>'
1182: .&Apache::loncommon::end_data_table_header_row()
1183: );
1184: $doheaders=-1;
1185: my @roletypes = &roletypes();
1186: foreach my $type (@roletypes) {
1187: my $haverole=0;
1188: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1189: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1190: $haverole=1;
1191: }
1192: }
1193: if ($haverole) { $doheaders++; }
1194: }
1195: }
1196: return $doheaders;
1197: }
1198:
1199: sub roletypes {
1200: my @types = ('Domain','Construction Space','Course','Community','Unavailable','System');
1201: return @types;
1202: }
1203:
1204: sub print_rolerows {
1205: my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
1206: if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
1207: my @types = &roletypes();
1208: foreach my $type (@types) {
1209: my $output;
1210: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1211: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1212: if (ref($roletext) eq 'HASH') {
1213: if (ref($roletext->{$sortrole->{$which}}) eq 'ARRAY') {
1214: $output.= &Apache::loncommon::start_data_table_row().
1215: $roletext->{$sortrole->{$which}}->[0].
1216: &Apache::loncommon::end_data_table_row().
1217: &Apache::loncommon::continue_data_table_row().
1218: $roletext->{$sortrole->{$which}}->[1].
1219: &Apache::loncommon::end_data_table_row();
1220: }
1221: if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
1222: if (ref($dcroles) eq 'HASH') {
1223: if ($dcroles->{$1}) {
1224: $output .= &adhoc_roles_row($1,'');
1225: }
1226: }
1227: }
1228: }
1229: }
1230: }
1231: if ($output) {
1232: if ($doheaders > 0) {
1233: $r->print(&Apache::loncommon::start_data_table_empty_row()
1234: .'<td align="center" colspan="5">'
1235: .&mt($type)
1236: .'</td>'
1237: .&Apache::loncommon::end_data_table_empty_row()
1238: );
1239: }
1240: $r->print($output);
1241: }
1242: }
1243: }
1244: }
1245:
1246: sub findcourse_advice {
1247: my ($r) = @_;
1248: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1249: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1250: if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
1251: $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
1252: <ul>
1253: <li>'.&mt('The course has yet to be created.').'</li>
1254: <li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
1255: <li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
1256: <li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
1257: <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>
1258: </ul>');
1259: } else {
1260: $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 />');
1261: }
1262: $r->print('<h3>'.&mt('Self-Enrollment').'</h3>'.
1263: '<p>'.&mt('The [_1]Course/Community Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created, as well as any communities in the domain.','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a>',$domdesc).'<br />');
1264: $r->print(&mt('You can search for courses and communities which permit self-enrollment, if you would like to enroll in one.').'</p>');
1265: &queued_selfenrollment($r);
1266: return;
1267: }
1268:
1269: sub requestcourse_advice {
1270: my ($r) = @_;
1271: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1272: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1273: my (%can_request,%request_doms);
1274: &Apache::lonnet::check_can_request($env{'user.domain'},\%can_request,\%request_doms);
1275: if (keys(%request_doms) > 0) {
1276: my ($types,$typename) = &Apache::loncommon::course_types();
1277: if ((ref($types) eq 'ARRAY') && (ref($typename) eq 'HASH')) {
1278: $r->print('<h3>'.&mt('Request creation of a course or community').'</h3>'.
1279: '<p>'.&mt('You have rights to request the creation of courses and/or communities in the following domain(s):').'<ul>');
1280: my (@reqdoms,@reqtypes);
1281: foreach my $type (sort(keys(%request_doms))) {
1282: push(@reqtypes,$type);
1283: if (ref($request_doms{$type}) eq 'ARRAY') {
1284: my $domstr = join(', ',map { &Apache::lonnet::domain($_) } sort(@{$request_doms{$type}}));
1285: $r->print(
1286: '<li>'
1287: .&mt('[_1]'.$typename->{$type}.'[_2] in domain: [_3]',
1288: '<i>',
1289: '</i>',
1290: '<b>'.$domstr.'</b>')
1291: .'</li>'
1292: );
1293: foreach my $dom (@{$request_doms{$type}}) {
1294: unless (grep(/^\Q$dom\E/,@reqdoms)) {
1295: push(@reqdoms,$dom);
1296: }
1297: }
1298: }
1299: }
1300: my @showtypes;
1301: foreach my $type (@{$types}) {
1302: if (grep(/^\Q$type\E$/,@reqtypes)) {
1303: push(@showtypes,$type);
1304: }
1305: }
1306: my $requrl = '/adm/requestcourse';
1307: if (@reqdoms == 1) {
1308: $requrl .= '?showdom='.$reqdoms[0];
1309: }
1310: if (@showtypes > 0) {
1311: $requrl.=(($requrl=~/\?/)?'&':'?').'crstype='.$showtypes[0];
1312: }
1313: if (@reqdoms == 1 || @showtypes > 0) {
1314: $requrl .= '&state=crstype&action=new';
1315: }
1316: $r->print('</ul>'.&mt('Use the [_1]request form[_2] to submit a request for creation of a new course or community.','<a href="'.$requrl.'">','</a>').'</p>');
1317: }
1318: }
1319: return;
1320: }
1321:
1322: sub queued_selfenrollment {
1323: my ($r) = @_;
1324: my %selfenrollrequests = &Apache::lonnet::dump('selfenrollrequests');
1325: my %reqs_by_date;
1326: foreach my $item (keys(%selfenrollrequests)) {
1327: if (ref($selfenrollrequests{$item}) eq 'HASH') {
1328: if ($selfenrollrequests{$item}{'status'} eq 'request') {
1329: if ($selfenrollrequests{$item}{'timestamp'}) {
1330: push(@{$reqs_by_date{$selfenrollrequests{$item}{'timestamp'}}},$item);
1331: }
1332: }
1333: }
1334: }
1335: if (keys(%reqs_by_date)) {
1336: my $rolename = &Apache::lonnet::plaintext('st');
1337: $r->print('<b>'.&mt('Enrollment requests pending Course Coordinator approval').'</b><br />'.
1338: &Apache::loncommon::start_data_table().
1339: &Apache::loncommon::start_data_table_header_row().
1340: '<th>'.&mt('Date requested').'</th><th>'.&mt('Course title').'</th>'.
1341: '<th>'.&mt('User role').'</th><th>'.&mt('Section').'</th>'.
1342: &Apache::loncommon::end_data_table_header_row());
1343: my @sorted = sort { $a <=> $b } (keys(%reqs_by_date));
1344: foreach my $item (@sorted) {
1345: if (ref($reqs_by_date{$item}) eq 'ARRAY') {
1346: foreach my $crs (@{$reqs_by_date{$item}}) {
1347: my %courseinfo = &Apache::lonnet::coursedescription($crs);
1348: my $usec = $selfenrollrequests{$crs}{'section'};
1349: if ($usec eq '') {
1350: $usec = &mt('No section');
1351: }
1352: $r->print(&Apache::loncommon::start_data_table_row().
1353: '<td>'.&Apache::lonlocal::locallocaltime($item).'</td>'.
1354: '<td>'.$courseinfo{'description'}.'</td>'.
1355: '<td>'.$rolename.'</td><td>'.$usec.'</td>'.
1356: &Apache::loncommon::end_data_table_row());
1357: }
1358: }
1359: }
1360: $r->print(&Apache::loncommon::end_data_table());
1361: }
1362: return;
1363: }
1364:
1365: sub privileges_info {
1366: my ($which) = @_;
1367: my $output;
1368:
1369: $which ||= $env{'request.role'};
1370:
1371: foreach my $envkey (sort(keys(%env))) {
1372: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
1373:
1374: my $where=$1;
1375: my $ttype;
1376: my $twhere;
1377: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
1378: if ($trest) {
1379: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
1380: $ttype='Construction Space';
1381: $twhere='User: '.$trest.', Domain: '.$tdom;
1382: } else {
1383: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
1384: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
1385: if ($tsec) {
1386: my $sec_type = 'Section';
1387: if (exists($env{"user.role.gr.$where"})) {
1388: $sec_type = 'Group';
1389: }
1390: $twhere.=' ('.$sec_type.': '.$tsec.')';
1391: }
1392: }
1393: } elsif ($tdom) {
1394: $ttype='Domain';
1395: $twhere=$tdom;
1396: } else {
1397: $ttype='System';
1398: $twhere='/';
1399: }
1400: $output .= "\n<h3>".&mt($ttype).': '.$twhere.'</h3>'."\n<ul>";
1401: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
1402: next if (!$priv);
1403:
1404: my ($prv,$restr)=split(/\&/,$priv);
1405: my $trestr='';
1406: if ($restr ne 'F') {
1407: $trestr.=' ('.
1408: join(', ',
1409: map { &Apache::lonnet::plaintext($_) }
1410: (split('',$restr))).') ';
1411: }
1412: $output .= "\n\t".
1413: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
1414: }
1415: $output .= "\n".'</ul>';
1416: }
1417: return $output;
1418: }
1419:
1420: sub build_roletext {
1421: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit) = @_;
1422: my ($roletext,$roletext_end);
1423: my $is_dc=($trolecode =~ m/^dc\./);
1424: my $rowspan=($is_dc) ? ''
1425: : ' rowspan="2" ';
1426:
1427: unless ($nochoose) {
1428: my $buttonname=$trolecode;
1429: $buttonname=~s/\W//g;
1430: if (!$button) {
1431: if ($switchserver) {
1432: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'
1433: .'<a href="/adm/switchserver?'.$switchserver.'">'
1434: .&mt('Switch Server')
1435: .'</a></td>';
1436: } else {
1437: $roletext.=('<td'.$rowspan.' class="'.$tbg.'"> </td>');
1438: }
1439: } elsif ($tstatus eq 'is') {
1440: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'.
1441: '<input name="'.$buttonname.'" type="button" value="'.
1442: &mt('Select').'" onclick="javascript:enterrole(this.form,\''.
1443: $trolecode."','".$buttonname.'\');" /></td>';
1444: } elsif ($tryagain) {
1445: $roletext.=
1446: '<td'.$rowspan.' class="'.$tbg.'">'.
1447: '<input name="'.$buttonname.'" type="button" value="'.
1448: &mt('Try Selecting Again').'" onclick="javascript:enterrole(this.form,\''.
1449: $trolecode."','".$buttonname.'\');" /></td>';
1450: } elsif ($advanced) {
1451: $roletext.=
1452: '<td'.$rowspan.' class="'.$tbg.'">'.
1453: '<input name="'.$buttonname.'" type="button" value="'.
1454: &mt('Re-Initialize').'" onclick="javascript:enterrole(this.form,\''.
1455: $trolecode."','".$buttonname.'\');" /></td>';
1456: } elsif ($reinit) {
1457: $roletext.=
1458: '<td'.$rowspan.' class="'.$tbg.'">'.
1459: '<input name="'.$buttonname.'" type="button" value="'.
1460: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1461: $trolecode."','".$buttonname.'\');" /></td>';
1462: } else {
1463: $roletext.=
1464: '<td'.$rowspan.' class="'.$tbg.'">'.
1465: '<input name="'.$buttonname.'" type="button" value="'.
1466: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1467: $trolecode."','".$buttonname.'\');" /></td>';
1468: }
1469: }
1470: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
1471: $tremark.=&Apache::lonannounce::showday(time,1,
1472: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
1473: }
1474: $roletext.='<td>'.$trole.'</td>'
1475: .'<td>'.$twhere.'</td>'
1476: .'<td>'.$tpstart.'</td>'
1477: .'<td>'.$tpend.'</td>';
1478: if (!$is_dc) {
1479: $roletext_end = '<td colspan="4">'.
1480: $tremark.' '.
1481: '</td>';
1482: }
1483: return ($roletext,$roletext_end);
1484: }
1485:
1486: sub check_needs_switchserver {
1487: my ($possiblerole) = @_;
1488: my $needs_switchserver;
1489: my ($role,$where) = split(/\./,$possiblerole,2);
1490: my (undef,$tdom,$twho) = split(/\//,$where);
1491: my ($server_status,$home);
1492: if (($role eq 'ca') || ($role eq 'aa')) {
1493: ($server_status,$home) = &check_author_homeserver($twho,$tdom);
1494: } else {
1495: ($server_status,$home) = &check_author_homeserver($env{'user.name'},
1496: $env{'user.domain'});
1497: }
1498: if ($server_status eq 'switchserver') {
1499: $needs_switchserver = 1;
1500: }
1501: return $needs_switchserver;
1502: }
1503:
1504: sub check_author_homeserver {
1505: my ($uname,$udom)=@_;
1506: if (($uname eq '') || ($udom eq '')) {
1507: return ('fail','');
1508: }
1509: my $home = &Apache::lonnet::homeserver($uname,$udom);
1510: if (&Apache::lonnet::host_domain($home) ne $udom) {
1511: return ('fail',$home);
1512: }
1513: my @ids=&Apache::lonnet::current_machine_ids();
1514: if (grep(/^\Q$home\E$/,@ids)) {
1515: return ('ok',$home);
1516: } else {
1517: return ('switchserver',$home);
1518: }
1519: }
1520:
1521: sub check_fordc {
1522: my ($dcroles,$then) = @_;
1523: my $numdc = 0;
1524: if ($env{'user.adv'}) {
1525: foreach my $envkey (sort keys %env) {
1526: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
1527: my $dcdom = $1;
1528: my $livedc = 1;
1529: my ($tstart,$tend)=split(/\./,$env{$envkey});
1530: if ($tstart && $tstart>$then) { $livedc = 0; }
1531: if ($tend && $tend <$then) { $livedc = 0; }
1532: if ($livedc) {
1533: $$dcroles{$dcdom} = $envkey;
1534: $numdc++;
1535: }
1536: }
1537: }
1538: }
1539: return $numdc;
1540: }
1541:
1542: sub adhoc_course_role {
1543: my ($refresh,$then) = @_;
1544: my ($cdom,$cnum,$crstype);
1545: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1546: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1547: $crstype = &Apache::loncommon::course_type();
1548: if (&check_forcc($cdom,$cnum,$refresh,$then,$crstype)) {
1549: my $setprivs;
1550: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
1551: $setprivs = 1;
1552: } else {
1553: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
1554: if (($start && ($start>$refresh || $start == -1)) ||
1555: ($end && $end<$then)) {
1556: $setprivs = 1;
1557: }
1558: }
1559: if ($setprivs) {
1560: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
1561: my $role = $1;
1562: my $custom_role = $2;
1563: my $usec = $3;
1564: if ($role eq 'cr') {
1565: if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
1566: $role .= $custom_role;
1567: } else {
1568: return;
1569: }
1570: }
1571: my (%userroles,%newrole,%newgroups,%group_privs);
1572: my %cgroups =
1573: &Apache::lonnet::get_active_groups($env{'user.domain'},
1574: $env{'user.name'},$cdom,$cnum);
1575: foreach my $group (keys(%cgroups)) {
1576: $group_privs{$group} =
1577: $env{'user.priv.cc./'.$cdom.'/'.$cnum.'./'.$cdom.'/'.$cnum.'/'.$group};
1578: }
1579: $newgroups{'/'.$cdom.'/'.$cnum} = \%group_privs;
1580: my $area = '/'.$cdom.'/'.$cnum;
1581: my $spec = $role.'.'.$area;
1582: if ($usec ne '') {
1583: $spec .= '/'.$usec;
1584: $area .= '/'.$usec;
1585: }
1586: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1587: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,\%newgroups);
1588: my $adhocstart = $refresh-1;
1589: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1590: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1591: }
1592: }
1593: }
1594: return;
1595: }
1596:
1597: sub check_forcc {
1598: my ($cdom,$cnum,$refresh,$then,$crstype) = @_;
1599: my ($is_cc,$ccrole);
1600: if ($crstype eq 'Community') {
1601: $ccrole = 'co';
1602: } else {
1603: $ccrole = 'cc';
1604: }
1605: if ($cdom ne '' && $cnum ne '') {
1606: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1607: my $envkey = 'user.role.'.$ccrole.'./'.$cdom.'/'.$cnum;
1608: if (defined($env{$envkey})) {
1609: $is_cc = 1;
1610: my ($tstart,$tend)=split(/\./,$env{$envkey});
1611: if ($tstart && $tstart>$refresh) { $is_cc = 0; }
1612: if ($tend && $tend <$then) { $is_cc = 0; }
1613: }
1614: }
1615: }
1616: return $is_cc;
1617: }
1618:
1619: sub courselink {
1620: my ($dcdom,$rowtype) = @_;
1621: my $courseform=&Apache::loncommon::selectcourse_link
1622: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1623: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1624: $dcdom,$dcdom,undef,'Course/Community');
1625: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1626: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1627: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1628: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1629: return $courseform.$hiddenitems;
1630: }
1631:
1632: sub coursepick_jscript {
1633: my %lt = &Apache::lonlocal::texthash(
1634: 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.",
1635: youc => 'You can only use this screen to select courses and communities in the current domain.',
1636: );
1637: my $verify_script = <<"END";
1638: <script type="text/javascript">
1639: // <![CDATA[
1640: function verifyCoursePick(caller) {
1641: var numbutton = getIndex(caller)
1642: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1643: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1644: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1645: if (pickedCourse != '') {
1646: if (numbutton != -1) {
1647: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1648: document.rolechoice.elements[numbutton+1].name = courseTarget
1649: document.rolechoice.submit()
1650: }
1651: }
1652: else {
1653: alert("$lt{'plsu'}");
1654: }
1655: }
1656: else {
1657: alert("$lt{'youc'}")
1658: }
1659: }
1660: function getIndex(caller) {
1661: for (var i=0;i<document.rolechoice.elements.length;i++) {
1662: if (document.rolechoice.elements[i] == caller) {
1663: return i;
1664: }
1665: }
1666: return -1;
1667: }
1668: // ]]>
1669: </script>
1670: END
1671: return $verify_script;
1672: }
1673:
1674: sub coauthorlink {
1675: my ($dcdom,$rowtype) = @_;
1676: my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
1677: my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
1678: return $coauthorform.$hiddenitems;
1679: }
1680:
1681: sub display_cc_role {
1682: my $rolekey = shift;
1683: my ($roletext,$roletext_end);
1684: my $advanced = $env{'user.adv'};
1685: my $tryagain = $env{'form.tryagain'};
1686: unless ($rolekey =~/^error\:/) {
1687: if ($rolekey =~ m{^user\.role\.(cc|co)\./($match_domain)/($match_courseid)$}) {
1688: my $ccrole = $1;
1689: my $tcourseid = $2.'_'.$3;
1690: my $trolecode = $1.'./'.$2.'/'.$3;
1691: my $twhere;
1692: my $ttype;
1693: my $tbg='LC_roles_is';
1694: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1695: if (%newhash) {
1696: $twhere=$newhash{'description'}.
1697: ' <span style="LC_fontsize_small">'.
1698: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1).
1699: '</span>';
1700: $ttype = $newhash{'type'};
1701: } else {
1702: $twhere=&mt('Currently not available');
1703: $env{'course.'.$tcourseid.'.description'}=$twhere;
1704: }
1705: my $trole = &Apache::lonnet::plaintext($ccrole,$ttype);
1706: $twhere.="<br />".&mt('Domain').":".$1;
1707: ($roletext,$roletext_end) = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$trole,$twhere,'','','',1,'');
1708: }
1709: }
1710: return ($roletext,$roletext_end);
1711: }
1712:
1713: sub adhoc_roles_row {
1714: my ($dcdom,$rowtype) = @_;
1715: my $output = &Apache::loncommon::continue_data_table_row()
1716: .' <td colspan="5">'
1717: .&mt('[_1]Ad hoc[_2] roles in domain [_3] --'
1718: ,'<span class="LC_cusr_emph">','</span>',$dcdom)
1719: .' ';
1720: my $selectcclink = &courselink($dcdom,$rowtype);
1721: my $ccrole = &Apache::lonnet::plaintext('co',undef,undef,1);
1722: my $carole = &Apache::lonnet::plaintext('ca');
1723: my $selectcalink = &coauthorlink($dcdom,$rowtype);
1724: $output.=$ccrole.': '.$selectcclink
1725: .' | '.$carole.': '.$selectcalink
1726: .&Apache::loncommon::end_data_table_row();
1727: return $output;
1728: }
1729:
1730: sub recent_filename {
1731: my $area=shift;
1732: return 'nohist_recent_'.&escape($area);
1733: }
1734:
1735: sub courseloadpage {
1736: my ($courseid) = @_;
1737: my $startpage;
1738: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1739: [$courseid.':courseinit']);
1740: my ($tmp) = %entry_settings;
1741: unless ($tmp =~ /^error: 2 /) {
1742: $startpage = $entry_settings{$courseid.':courseinit'};
1743: }
1744: if ($startpage eq '') {
1745: if (exists($env{'environment.course_init_display'})) {
1746: $startpage = $env{'environment.course_init_display'};
1747: }
1748: }
1749: return $startpage;
1750: }
1751:
1752: 1;
1753: __END__
1754:
1755: =head1 NAME
1756:
1757: Apache::lonroles - User Roles Screen
1758:
1759: =head1 SYNOPSIS
1760:
1761: Invoked by /etc/httpd/conf/srm.conf:
1762:
1763: <Location /adm/roles>
1764: PerlAccessHandler Apache::lonacc
1765: SetHandler perl-script
1766: PerlHandler Apache::lonroles
1767: ErrorDocument 403 /adm/login
1768: ErrorDocument 500 /adm/errorhandler
1769: </Location>
1770:
1771: =head1 OVERVIEW
1772:
1773: =head2 Choosing Roles
1774:
1775: C<lonroles> is a handler that allows a user to switch roles in
1776: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1777: default role that a user has before selecting a role, as widely as
1778: possible, but certain handlers for example need specification which
1779: course they should act on, etc. Both in this scenario, and when the
1780: handler determines via C<lonnet>'s C<&allowed> function that a certain
1781: action is not allowed, C<lonroles> is used as error handler. This
1782: allows the user to select another role which may have permission to do
1783: what they were trying to do. C<lonroles> can also be accessed via the
1784: B<CRS> button in the Remote Control.
1785:
1786: =begin latex
1787:
1788: \begin{figure}
1789: \begin{center}
1790: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1791: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1792: \end{center}
1793: \end{figure}
1794:
1795: =end latex
1796:
1797: =head2 Role Initialization
1798:
1799: 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.
1800:
1801: =head1 INTRODUCTION
1802:
1803: This module enables a user to select what role he wishes to
1804: operate under (instructor, student, teaching assistant, course
1805: coordinator, etc). These roles are pre-established by the actions
1806: of upper-level users.
1807:
1808: This is part of the LearningOnline Network with CAPA project
1809: described at http://www.lon-capa.org.
1810:
1811: =head1 HANDLER SUBROUTINE
1812:
1813: This routine is called by Apache and mod_perl.
1814:
1815: =over 4
1816:
1817: =item *
1818:
1819: Roles Initialization (yes/no)
1820:
1821: =item *
1822:
1823: Get Error Message from Environment
1824:
1825: =item *
1826:
1827: Who is this?
1828:
1829: =item *
1830:
1831: Generate Page Output
1832:
1833: =item *
1834:
1835: Choice or no choice
1836:
1837: =item *
1838:
1839: Table
1840:
1841: =item *
1842:
1843: Privileges
1844:
1845: =back
1846:
1847: =cut
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