1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.240.2.7 2010/01/05 15:30:25 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: &Apache::lonhtmlcommon::clear_breadcrumbs();
169: my $end_page = &Apache::loncommon::end_page();
170:
171: # Note to style police:
172: # This must only replace the spaces, nothing else, or it bombs elsewhere.
173: $url=~s/ /\%20/g;
174: $r->print(<<ENDREDIR);
175: $start_page
176: <script type="text/javascript">
177: // <![CDATA[
178: $swinfo
179: // ]]>
180: </script>
181: $navwindow
182: <p>$msg</p>
183: $end_page
184: ENDREDIR
185: return;
186: }
187:
188: sub error_page {
189: my ($r,$error,$dest)=@_;
190: &Apache::loncommon::content_type($r,'text/html');
191: &Apache::loncommon::no_cache($r);
192: $r->send_http_header;
193: return OK if $r->header_only;
194: # Breadcrumbs
195: my $brcrum = [{'href' => $dest,
196: 'text' => 'Problems during Course Initialization'},];
197: $r->print(&Apache::loncommon::start_page('Problems during Course Initialization',
198: undef,
199: {'bread_crumbs' => $brcrum,})
200: );
201: $r->print(
202: '<script type="text/javascript">'.
203: '// <![CDATA['.
204: &Apache::lonmenu::rawconfig().
205: '// ]]>'.
206: '</script>'.
207: '<p class="LC_error">'.&mt('The following problems occurred:').
208: '<br />'.
209: $error.
210: '</p><br /><a href="'.$dest.'">'.&mt('Continue').'</a>'
211: );
212: $r->print(&Apache::loncommon::end_page());
213: }
214:
215: sub handler {
216:
217: my $r = shift;
218:
219: my $now=time;
220: my $then=$env{'user.login.time'};
221: my $refresh=$env{'user.refresh.time'};
222: if (!$refresh) {
223: $refresh = $then;
224: }
225: my $envkey;
226: my %dcroles = ();
227: my $numdc = &check_fordc(\%dcroles,$then);
228: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
229: my $custommenu = &Apache::loncommon::needs_gci_custom();
230:
231: # ================================================================== Roles Init
232: if ($env{'form.selectrole'}) {
233:
234: my $locknum=&Apache::lonnet::get_locks();
235: if ($locknum) { return 409; }
236:
237: if ($env{'form.newrole'}) {
238: $env{'form.'.$env{'form.newrole'}}=1;
239: }
240: if ($env{'request.course.id'}) {
241: # Check if user is CC trying to select a course role
242: if ($env{'form.switchrole'}) {
243: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
244: &adhoc_course_role($refresh,$then);
245: }
246: }
247: my %temp=('logout_'.$env{'request.course.id'} => time);
248: &Apache::lonnet::put('email_status',\%temp);
249: &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
250: }
251: &Apache::lonnet::appenv({"request.course.id" => '',
252: "request.course.fn" => '',
253: "request.course.uri" => '',
254: "request.course.sec" => '',
255: "request.role" => 'cm',
256: "request.role.adv" => $env{'user.adv'},
257: "request.role.domain" => $env{'user.domain'}});
258: # Check if user is a DC trying to enter a course or author space and needs privs to be created
259: if ($numdc > 0) {
260: foreach my $envkey (keys %env) {
261: # Is this an ad-hoc Coordinator role?
262: if (my ($ccrole,$domain,$coursenum) =
263: ($envkey =~ m-^form\.(cc|co)\./($match_domain)/($match_courseid)$-)) {
264: if ($dcroles{$domain}) {
265: &Apache::lonnet::check_adhoc_privs($domain,$coursenum,
266: $then,$refresh,$now,$ccrole);
267: }
268: last;
269: }
270: # Is this an ad-hoc CA-role?
271: if (my ($domain,$user) =
272: ($envkey =~ m-^form\.ca\./($match_domain)/($match_username)$-)) {
273: if (($domain eq $env{'user.domain'}) && ($user eq $env{'user.name'})) {
274: delete($env{$envkey});
275: $env{'form.au./'.$domain.'/'} = 1;
276: my ($server_status,$home) = &check_author_homeserver($user,$domain);
277: if ($server_status eq 'switchserver') {
278: my $trolecode = 'au./'.$domain.'/';
279: my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
280: $r->internal_redirect($switchserver);
281: }
282: last;
283: }
284: if (my ($castart,$caend) = ($env{'user.role.ca./'.$domain.'/'.$user} =~ /^(\d*)\.(\d*)$/)) {
285: if (((($castart) && ($castart < $now)) || !$castart) &&
286: ((!$caend) || (($caend) && ($caend > $now)))) {
287: my ($server_status,$home) = &check_author_homeserver($user,$domain);
288: if ($server_status eq 'switchserver') {
289: my $trolecode = 'ca./'.$domain.'/'.$user;
290: my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
291: $r->internal_redirect($switchserver);
292: }
293: last;
294: }
295: }
296: # Check if author blocked ca-access
297: my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],$domain,$user);
298: if ($blocked{'domcoord.author'} eq 'blocked') {
299: delete($env{$envkey});
300: $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
301: last;
302: }
303: if ($dcroles{$domain}) {
304: my ($server_status,$home) = &check_author_homeserver($user,$domain);
305: if (($server_status eq 'ok') || ($server_status eq 'switchserver')) {
306: &Apache::lonnet::check_adhoc_privs($domain,$user,$then,
307: $refresh,$now,'ca');
308: if ($server_status eq 'switchserver') {
309: my $trolecode = 'ca./'.$domain.'/'.$user;
310: my $switchserver = '/adm/switchserver?'
311: .'otherserver='.$home.'&role='.$trolecode;
312: $r->internal_redirect($switchserver);
313: }
314: } else {
315: delete($env{$envkey});
316: }
317: } else {
318: delete($env{$envkey});
319: }
320: last;
321: }
322: }
323: }
324: if (($env{'form.cm'}) && ($env{'form.orgurl'})) {
325: $r->internal_redirect($env{'form.orgurl'});
326: }
327: foreach $envkey (keys %env) {
328: next if ($envkey!~/^user\.role\./);
329: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
330: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
331: \$trolecode,\$tstatus,\$tstart,\$tend);
332: if ($env{'form.'.$trolecode}) {
333: if ($tstatus eq 'is') {
334: $where=~s/^\///;
335: my ($cdom,$cnum,$csec)=split(/\//,$where);
336: # check for course groups
337: my %coursegroups = &Apache::lonnet::get_active_groups(
338: $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
339: my $cgrps = join(':',keys(%coursegroups));
340:
341: # store role if recent_role list being kept
342: if ($env{'environment.recentroles'}) {
343: my %frozen_roles =
344: &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
345: &Apache::lonhtmlcommon::store_recent('roles',
346: $trolecode,' ',$frozen_roles{$trolecode});
347: }
348:
349:
350: # check for keyed access
351: if (($role eq 'st') &&
352: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
353: # who is key authority?
354: my $authdom=$cdom;
355: my $authnum=$cnum;
356: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
357: ($authnum,$authdom)=
358: split(/:/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
359: }
360: # check with key authority
361: unless (&Apache::lonnet::validate_access_key(
362: $env{'environment.key.'.$cdom.'_'.$cnum},
363: $authdom,$authnum)) {
364: # there is no valid key
365: if ($env{'form.newkey'}) {
366: # student attempts to register a new key
367: &Apache::loncommon::content_type($r,'text/html');
368: &Apache::loncommon::no_cache($r);
369: $r->send_http_header;
370: my $swinfo=&Apache::lonmenu::rawconfig();
371: my $start_page=&Apache::loncommon::start_page
372: ('Verifying Access Key to Unlock this Course');
373: my $end_page=&Apache::loncommon::end_page();
374: my $buttontext=&mt('Enter Course');
375: my $message=&mt('Successfully registered key');
376: my $assignresult=
377: &Apache::lonnet::assign_access_key(
378: $env{'form.newkey'},
379: $authdom,$authnum,
380: $cdom,$cnum,
381: $env{'user.domain'},
382: $env{'user.name'},
383: &mt('Assigned from [_1] at [_2] for [_3]'
384: ,$ENV{'REMOTE_ADDR'}
385: ,&Apache::lonlocal::locallocaltime()
386: ,$trolecode)
387: );
388: unless ($assignresult eq 'ok') {
389: $assignresult=~s/^error\:\s*//;
390: $message=&mt($assignresult).
391: '<br /><a href="/adm/logout">'.
392: &mt('Logout').'</a>';
393: $buttontext=&mt('Re-Enter Key');
394: }
395: $r->print(<<ENDENTEREDKEY);
396: $start_page
397: <script type="text/javascript">
398: // <![CDATA[
399: $swinfo
400: // ]]>
401: </script>
402: <form action="" method="post">
403: <input type="hidden" name="selectrole" value="1" />
404: <input type="hidden" name="$trolecode" value="1" />
405: <span class="LC_fontsize_large">$message</span><br />
406: <input type="submit" value="$buttontext" />
407: </form>
408: $end_page
409: ENDENTEREDKEY
410: return OK;
411: } else {
412: # print form to enter a new key
413: &Apache::loncommon::content_type($r,'text/html');
414: &Apache::loncommon::no_cache($r);
415: $r->send_http_header;
416: my $swinfo=&Apache::lonmenu::rawconfig();
417: my $start_page=&Apache::loncommon::start_page
418: ('Enter Access Key to Unlock this Course');
419: my $end_page=&Apache::loncommon::end_page();
420: $r->print(<<ENDENTERKEY);
421: $start_page
422: <script type="text/javascript">
423: // <![CDATA[
424: $swinfo
425: // ]]>
426: </script>
427: <form action="" method="post">
428: <input type="hidden" name="selectrole" value="1" />
429: <input type="hidden" name="$trolecode" value="1" />
430: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
431: <input type="submit" value="Enter key" />
432: </form>
433: $end_page
434: ENDENTERKEY
435: return OK;
436: }
437: }
438: }
439: &Apache::lonnet::log($env{'user.domain'},
440: $env{'user.name'},
441: $env{'user.home'},
442: "Role ".$trolecode);
443:
444: &Apache::lonnet::appenv(
445: {'request.role' => $trolecode,
446: 'request.role.domain' => $cdom,
447: 'request.course.sec' => $csec,
448: 'request.course.groups' => $cgrps});
449: my $tadv=0;
450:
451: if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
452: my $msg;
453: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
454: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
455: my ($furl,$ferr)=
456: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
457: if (($env{'form.orgurl'}) &&
458: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
459: my $dest=$env{'form.orgurl'};
460: if ($env{'form.symb'}) {
461: if ($dest =~ /\?/) {
462: $dest .= '&';
463: } else {
464: $dest .= '?'
465: }
466: $dest .= 'symb='.$env{'form.symb'};
467: }
468: if (($ferr) && ($tadv)) {
469: &error_page($r,$ferr,$dest);
470: } else {
471: $r->internal_redirect($dest);
472: }
473: return OK;
474: } else {
475: if (!$env{'request.course.id'}) {
476: &Apache::lonnet::appenv(
477: {"request.course.id" => $cdom.'_'.$cnum});
478: $furl='/adm/roles?tryagain=1';
479: $msg='<p><span class="LC_error">'
480: .&mt('Could not initialize [_1] at this time.',
481: $env{'course.'.$cdom.'_'.$cnum.'.description'})
482: .'</span></p>'
483: .'<p>'.&mt('Please try again.').'</p>'
484: .'<p>'.$ferr.'</p>';
485: }
486:
487: if (($ferr) && ($tadv)) {
488: &error_page($r,$ferr,$furl);
489: } else {
490: # Check to see if the user is a CC entering a course
491: # for the first time
492: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
493: if (substr($courseid, 0, 1) eq '/') {
494: $courseid = substr($courseid, 1);
495: }
496: $courseid =~ s/\//_/;
497: if (($cdom ne 'gcitest') && (($role eq 'cc') || ($role eq 'co'))
498: && ($env{'course.' . $courseid .'.course.helper.not.run'})) {
499: $furl = "/adm/helper/course.initialization.helper";
500: # Send the user to the course they selected
501: } elsif ($env{'request.course.id'}) {
502: if ($env{'form.destinationurl'}) {
503: my $dest = $env{'form.destinationurl'};
504: if ($env{'form.destsymb'} ne '') {
505: my $esc_symb = &HTML::Entities::encode($env{'form.destsymb'},'"<>&');
506: $dest .= '?symb='.$esc_symb;
507: }
508: &redirect_user($r,&mt('Entering [_1]',
509: $env{'course.'.$courseid.'.description'}),
510: $dest,$msg,
511: $env{'environment.remotenavmap'});
512: return OK;
513: }
514: if (&Apache::lonnet::allowed('whn',
515: $env{'request.course.id'})
516: || &Apache::lonnet::allowed('whn',
517: $env{'request.course.id'}.'/'
518: .$env{'request.course.sec'})
519: ) {
520: my $startpage = &courseloadpage($courseid);
521: unless (($startpage eq 'firstres') || ($cdom eq 'gcitest')) {
522: $msg = &mt('Entering [_1] ...',
523: $env{'course.'.$courseid.'.description'});
524: &redirect_user($r,&mt('New in course'),
525: '/adm/whatsnew?refpage=start',$msg,
526: $env{'environment.remotenavmap'});
527: return OK;
528: }
529: }
530: }
531: # Are we allowed to look at the first resource?
532: if ($furl !~ m|^/adm/|) {
533: # Guess not ...
534: $furl=&Apache::lonpageflip::first_accessible_resource();
535: }
536: if (($cdom eq 'gcitest') && ($custommenu)) {
537: $furl = '/adm/navmaps';
538: }
539: $msg = &mt('Entering [_1] ...',
540: $env{'course.'.$courseid.'.description'});
541: &redirect_user($r,&mt('Entering [_1]',
542: $env{'course.'.$courseid.'.description'}),
543: $furl,$msg,
544: $env{'environment.remotenavmap'});
545: }
546: return OK;
547: }
548: }
549: #
550: # Send the user to the construction space they selected
551: if ($role =~ /^(au|ca|aa)$/) {
552: my $redirect_url = '/priv/';
553: if ($role eq 'au') {
554: $redirect_url.=$env{'user.name'};
555: } else {
556: $where =~ /\/(.*)$/;
557: $redirect_url .= $1;
558: }
559: $redirect_url .= '/';
560: &redirect_user($r,&mt('Entering Construction Space'),
561: $redirect_url);
562: return OK;
563: }
564: if ($role eq 'dc') {
565: my $redirect_url = '/adm/menu/';
566: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
567: $redirect_url);
568: return OK;
569: }
570: if ($role eq 'sc') {
571: my $redirect_url = '/adm/grades?command=scantronupload';
572: &redirect_user($r,&mt('Loading Data Upload Page'),
573: $redirect_url);
574: return OK;
575: }
576: }
577: }
578: }
579: }
580:
581: # =============================================================== No Roles Init
582:
583: &Apache::loncommon::content_type($r,'text/html');
584: &Apache::loncommon::no_cache($r);
585: $r->send_http_header;
586: return OK if $r->header_only;
587:
588: my ($crumbtext,$pagetitle,$recent,$show_course);
589: my $noscript='<span class="LC_error">'.&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.').'<br />'.&mt('As this is not the case, most functionality in the system will be unavailable.').'</span><br />';
590: if ($custommenu) {
591: my $start_page = &Apache::loncommon::start_page('Main Menu',undef,
592: {'bread_crumbs' => 1});
593: $r->print(<<"ENDCUSTOM");
594: $start_page
595: <br />
596: <noscript>
597: $noscript
598: </noscript>
599: ENDCUSTOM
600: } else {
601: $crumbtext = 'User Roles';
602: $pagetitle = 'My Roles';
603: $recent = &mt('Recent Roles');
604: $show_course=&Apache::loncommon::show_course();
605: if ($show_course) {
606: $crumbtext = 'Courses';
607: $pagetitle = 'My Courses';
608: $recent = &mt('Recent Courses');
609: }
610: my $brcrum =[{href=>"/adm/roles",text=>$crumbtext}];
611: my $swinfo=&Apache::lonmenu::rawconfig();
612: my $start_page=&Apache::loncommon::start_page($pagetitle,undef,{bread_crumbs=>$brcrum});
613: my $standby=&mt('Role selected. Please stand by.');
614: $standby=~s/\n/\\n/g;
615: $r->print(<<ENDHEADER);
616: $start_page
617: <br />
618: <noscript>
619: $noscript
620: </noscript>
621: <script type="text/javascript">
622: // <![CDATA[
623: $swinfo
624: window.focus();
625:
626: active=true;
627:
628: function enterrole (thisform,rolecode,buttonname) {
629: if (active) {
630: active=false;
631: document.title='$standby';
632: window.status='$standby';
633: thisform.newrole.value=rolecode;
634: thisform.submit();
635: } else {
636: alert('$standby');
637: }
638: }
639: // ]]>
640: </script>
641: ENDHEADER
642: }
643:
644: # ------------------------------------------ Get Error Message from Environment
645:
646: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
647: if ($env{'user.error.msg'}) {
648: $r->log_reason(
649: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
650: }
651:
652: # ------------------------------------------------- Can this user re-init, etc?
653:
654: my $advanced=$env{'user.adv'};
655: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
656: my $tryagain=$env{'form.tryagain'};
657: my $reinit=$env{'user.reinit'};
658: delete $env{'user.reinit'};
659:
660: # -------------------------------------------------------- Generate Page Output
661: # --------------------------------------------------------------- Error Header?
662: if ($error) {
663: $r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
664: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
665: if ($priv ne '') {
666: $r->print(&mt('Access : ').&Apache::lonnet::plaintext($priv)."\n");
667: }
668: if ($fn ne '') {
669: $r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
670: }
671: if ($msg ne '') {
672: $r->print(&mt('Action : ').$msg."\n");
673: }
674: $r->print("</pre><hr />");
675: my $url=$fn;
676: my $last;
677: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
678: &GDBM_READER(),0640)) {
679: $last=$hash{'last_known'};
680: untie(%hash);
681: }
682: if ($last) { $fn.='?symb='.&escape($last); }
683:
684: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
685: &Apache::lonenc::check_encrypt($fn));
686: } else {
687: if ($env{'user.error.msg'}) {
688: if ($reinit) {
689: $r->print(
690: '<h3><span class="LC_error">'.
691: &mt('As your session file for the course or community has expired, you will need to re-select it.').'</span></h3>');
692: } else {
693: $r->print(
694: '<h3><span class="LC_error">'.
695: &mt('You need to choose another user role or enter a specific course or community for this function.').
696: '</span></h3>');
697: }
698: }
699: }
700: # -------------------------------------------------------- Choice or no choice?
701: if ($nochoose) {
702: $r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
703: &mt('This action is currently not authorized.').'</span>'.
704: &Apache::loncommon::end_page());
705: return OK;
706: } else {
707: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
708: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
709: }
710: unless ($custommenu) {
711: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
712: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
713: $r->print('<input type="hidden" name="selectrole" value="1" />');
714: $r->print('<input type="hidden" name="newrole" value="" />');
715: }
716: }
717:
718: my (%roletext,%sortrole,%roleclass,%futureroles,%timezones);
719: my ($countactive,$countfuture,$inrole,$possiblerole) =
720: &gather_roles($then,$refresh,$now,$reinit,$nochoose,\%roletext,\%sortrole,\%roleclass,
721: \%futureroles,\%timezones);
722:
723: $refresh = $now;
724: &Apache::lonnet::appenv({'user.refresh.time' => $refresh});
725: if ($custommenu) {
726: if ($env{'form.destinationurl'} eq '/adm/gci_info') {
727: $r->print(&gci_info_page()).
728: &Apache::loncommon::end_page();
729: return OK;
730: }
731: my %courses = &Apache::loncommon::existing_gcitest_courses();
732: $env{'browser.interface'}='faketextual';
733: $env{'environment.remote'}='off';
734: my $numcourses = keys(%courses);
735: my $switcher;
736: if ($numcourses > 0) {
737: $switcher = &Apache::lonmainmenu::gcitest_switcher(%courses);
738: my $current;
739: if ($env{'request.course.id'}) {
740: $current = 'cc./'.$env{'course.'.$env{'request.course.id'}.'.domain'}.
741: '/'.$env{'course.'.$env{'request.course.id'}.'.num'};
742: }
743: my $switcher_js = &Apache::lonmainmenu::gcitest_switcher_js($current,$numcourses);
744: $r->print(<<"ENDSCRIPT");
745: <script type="text/javascript">
746: // <![CDATA[
747: $switcher_js
748: // ]]>
749: </script>
750: ENDSCRIPT
751: }
752: $r->print(&Apache::lonmenu::inlinemenu('gcicustom',$switcher).
753: &Apache::loncommon::end_page());
754: return OK;
755: } else {
756: if ($env{'form.destinationurl'} eq '/adm/gci_info') {
757: delete($env{'form.destinationurl'});
758: }
759: }
760: if ($env{'user.adv'}) {
761: $r->print('<p><label><input type="checkbox" name="showall"');
762: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
763: $r->print(' />'.&mt('Show all roles').'</label>'
764: .' <input type="submit" value="'.&mt('Update display').'" />'
765: .'</p>');
766: } else {
767: if ($countactive > 0) {
768: &queued_selfenrollment($r);
769: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
770: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
771: unless ($env{'user.domain'} eq 'gcitest') {
772: $r->print(
773: '<p>'
774: .&mt('[_1]Visit the [_2]Course/Community Catalog[_3]'
775: .' to view all [_4] LON-CAPA courses and communities.'
776: ,'<b>'
777: ,'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
778: ,'</a></b>',$domdesc)
779: .'<br />'
780: .&mt('If a course or community is [_1]not[_2] in your list of current courses and communities below,'
781: .' you may be able to enroll if self-enrollment is permitted.'
782: ,'<b>','</b>')
783: .'</p>'
784: );
785: }
786: }
787: }
788:
789: # No active roles
790: if ($countactive==0) {
791: if ($inrole) {
792: $r->print('<h2>'.&mt('Currently no additional roles, courses or communities').'</h2>');
793: } else {
794: $r->print('<h2>'.&mt('Currently no active roles, courses or communities').'</h2>');
795: }
796: unless ($env{'user.domain'} eq 'gcitest') {
797: &findcourse_advice($r);
798: &requestcourse_advice($r);
799: }
800: $r->print('</form>');
801: if ($countfuture) {
802: $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
803: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
804: $nochoose);
805: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
806: \%roletext);
807: my $tremark='';
808: my $tbg;
809: if ($env{'request.role'} eq 'cm') {
810: $tbg="LC_roles_selected";
811: $tremark=&mt('Currently selected.').' ';
812: } else {
813: $tbg="LC_roles_is";
814: }
815: $r->print(&Apache::loncommon::start_data_table_row()
816: .'<td class="'.$tbg.'"> </td>'
817: .'<td colspan="3">'
818: .&mt('No role specified')
819: .'</td>'
820: .'<td>'.$tremark.' </td>'
821: .&Apache::loncommon::end_data_table_row()
822: );
823:
824: $r->print(&Apache::loncommon::end_data_table());
825: }
826: $r->print(&Apache::loncommon::end_page());
827: return OK;
828: } elsif ($countactive==1) { # Is there only one choice?
829: my $needs_switchserver;
830: if ($env{'user.author'}) {
831: $needs_switchserver = &check_needs_switchserver($possiblerole);
832: }
833: if ((!$needs_switchserver) && ($env{'request.role'} eq 'cm')) {
834: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
835: '<input type="hidden" name="'.$possiblerole.'" value="1" />'.
836: '<noscript><br /><input type="submit" name="submit" value="'.&mt('Continue').'" /></noscript>');
837: $r->print("</form>\n");
838: $r->rflush();
839: $r->print('<script type="text/javascript">document.forms.rolechoice.submit();</script>');
840: $r->print(&Apache::loncommon::end_page());
841: return OK;
842: }
843: if ($needs_switchserver) {
844: $r->print("<h2>".&mt('Server Switch Required')."</h2>\n".
845: &mt('Construction Space access is only available from '.
846: 'the home server of the corresponding Author.').'<br />'.
847: &mt("Click the 'Switch Server' link to go there.").'<br />');
848: }
849: }
850: # ----------------------------------------------------------------------- Table
851: unless ((!&Apache::loncommon::show_course()) || ($nochoose) || ($countactive==1)) {
852: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
853: }
854: if ($env{'form.destinationurl'}) {
855: $r->print('<input type="hidden" name="destinationurl" value="'.
856: $env{'form.destinationurl'}.'" />');
857: if ($env{'form.destsymb'} ne '') {
858: $r->print('<input type="hidden" name="destsymb" value="'.
859: $env{'form.destsymb'}.'" />');
860: }
861: }
862: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
863: if ($env{'environment.recentroles'}) {
864: my %recent_roles =
865: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
866: my $output='';
867: foreach (sort(keys(%recent_roles))) {
868: if (ref($roletext{'user.role.'.$_}) eq 'ARRAY') {
869: $output.= &Apache::loncommon::start_data_table_row().
870: $roletext{'user.role.'.$_}->[0].
871: &Apache::loncommon::end_data_table_row().
872: &Apache::loncommon::continue_data_table_row().
873: $roletext{'user.role.'.$_}->[1].
874: &Apache::loncommon::end_data_table_row();
875: if ($_ =~ m-dc\./($match_domain)/-
876: && $dcroles{$1}) {
877: $output .= &adhoc_roles_row($1,'recent');
878: }
879: } elsif ($numdc > 0) {
880: unless ($_ =~/^error\:/) {
881: $output.=&display_cc_role('user.role.'.$_);
882: }
883: }
884: }
885: if ($output) {
886: $r->print(&Apache::loncommon::start_data_table_empty_row()
887: .'<td align="center" colspan="5">'
888: .$recent
889: .'</td>'
890: .&Apache::loncommon::end_data_table_empty_row()
891: );
892: $r->print($output);
893: $doheaders ++;
894: }
895: }
896:
897: if ($numdc > 0) {
898: $r->print(&coursepick_jscript());
899: $r->print(&Apache::loncommon::coursebrowser_javascript().
900: &Apache::loncommon::authorbrowser_javascript());
901: }
902: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
903: if ($countactive > 1) {
904: my $tremark='';
905: my $tbg;
906: if ($env{'request.role'} eq 'cm') {
907: $tbg="LC_roles_selected";
908: $tremark=&mt('Currently selected.').' ';
909: } else {
910: $tbg="LC_roles_is";
911: }
912: $r->print(&Apache::loncommon::start_data_table_row());
913: unless ($nochoose) {
914: if ($env{'request.role'} ne 'cm') {
915: $r->print('<td class="'.$tbg.'"><input type="submit" value="'.
916: &mt('Select').'" name="cm" /></td>');
917: } else {
918: $r->print('<td class="'.$tbg.'"> </td>');
919: }
920: }
921: $r->print('<td colspan="3">'
922: .&mt('No role specified')
923: .'</td>'
924: .'<td>'.$tremark.' </td>'
925: .&Apache::loncommon::end_data_table_row()
926: );
927: }
928: $r->print(&Apache::loncommon::end_data_table());
929: unless ($nochoose) {
930: $r->print("</form>\n");
931: }
932: # ------------------------------------------------------------ Privileges Info
933: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
934: $r->print('<hr /><h2>'.&mt('Current Privileges').'</h2>');
935: $r->print(&privileges_info());
936: }
937: $r->print(&Apache::lonnet::getannounce());
938: if ($advanced) {
939: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
940: $r->print('<p><small><i>'
941: .&mt('This LON-CAPA server is version [_1]',$r->dir_config('lonVersion'))
942: .'</i><br />'
943: .'<a href="/adm/logout">'.&mt('Logout').'</a> '
944: .'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
945: .&mt('Course/Community Catalog')
946: .'</a></small></p>');
947: }
948: $r->print(&Apache::loncommon::end_page());
949: return OK;
950: }
951:
952: sub gci_info_page {
953: return <<"END";
954: <h2>Welcome to the Geoscience Concept Inventory WebCenter</h2>
955: <p>
956: Use the tabs to navigate the WebCenter and...
957: <ul>
958: <li>Review and comment on existing GCI questions</li>
959: <li>Submit a GCI question of your own</li>
960: <li>Create an online test for your students</li>
961: </ul>
962: </p>
963: <p>For more information about writing and reviewing Concept Inventory questions
964: please refer to the <a href="/res/gci/gci/internal/pdfs/GCIWorkbook.pdf">GCI Workbook</a>.
965:
966: END
967: }
968:
969: sub gather_roles {
970: my ($then,$refresh,$now,$reinit,$nochoose,$roletext,$sortrole,$roleclass,$futureroles,$timezones) = @_;
971: my ($countactive,$countfuture,$inrole,$possiblerole) = (0,0,0,'');
972: my $advanced = $env{'user.adv'};
973: my $tryagain = $env{'form.tryagain'};
974: foreach my $envkey (sort(keys(%env))) {
975: my $button = 1;
976: my $switchserver='';
977: my ($role_text,$role_text_end,$sortkey);
978: if ($envkey=~/^user\.role\./) {
979: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
980: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
981: \$trolecode,\$tstatus,\$tstart,\$tend);
982: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
983: my $timezone = &role_timezone($where,$timezones);
984: $tremark='';
985: $tpstart=' ';
986: $tpend=' ';
987: if ($tstart) {
988: $tpstart=&Apache::lonlocal::locallocaltime($tstart,$timezone);
989: }
990: if ($tend) {
991: $tpend=&Apache::lonlocal::locallocaltime($tend,$timezone);
992: }
993: if ($env{'request.role'} eq $trolecode) {
994: $tstatus='selected';
995: }
996: my $tbg;
997: if (($tstatus eq 'is')
998: || ($tstatus eq 'selected')
999: || ($tstatus eq 'future')
1000: || ($env{'form.showall'})) {
1001: if ($tstatus eq 'is') {
1002: $tbg='LC_roles_is';
1003: $possiblerole=$trolecode;
1004: $countactive++;
1005: } elsif ($tstatus eq 'future') {
1006: $tbg='LC_roles_future';
1007: $button=0;
1008: $futureroles->{$trolecode} = $tstart.':'.$tend;
1009: $countfuture ++;
1010: } elsif ($tstatus eq 'expired') {
1011: $tbg='LC_roles_expired';
1012: $button=0;
1013: } elsif ($tstatus eq 'will_not') {
1014: $tbg='LC_roles_will_not';
1015: $tremark.=&mt('Expired after logout.').' ';
1016: } elsif ($tstatus eq 'selected') {
1017: $tbg='LC_roles_selected';
1018: $inrole=1;
1019: $countactive++;
1020: $tremark.=&mt('Currently selected.').' ';
1021: }
1022: my $trole;
1023: if ($role =~ /^cr\//) {
1024: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
1025: if ($tremark) { $tremark.='<br />'; }
1026: $tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
1027: }
1028: $trole=Apache::lonnet::plaintext($role);
1029: my $ttype;
1030: my $twhere;
1031: my ($tdom,$trest,$tsection)=
1032: split(/\//,Apache::lonnet::declutter($where));
1033: # First, Co-Authorship roles
1034: if (($role eq 'ca') || ($role eq 'aa')) {
1035: my $home = &Apache::lonnet::homeserver($trest,$tdom);
1036: my $allowed=0;
1037: my @ids=&Apache::lonnet::current_machine_ids();
1038: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1039: if (!$allowed) {
1040: $button=0;
1041: $switchserver='otherserver='.$home.'&role='.$trolecode;
1042: }
1043: #next if ($home eq 'no_host');
1044: $home = &Apache::lonnet::hostname($home);
1045: $ttype='Construction Space';
1046: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
1047: ': '.$tdom.'<br />'.
1048: ' '.&mt('Server').': '.$home;
1049: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1050: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
1051: $sortkey=$role."$trest:$tdom";
1052: } elsif ($role eq 'au') {
1053: # Authors
1054: my $home = &Apache::lonnet::homeserver
1055: ($env{'user.name'},$env{'user.domain'});
1056: my $allowed=0;
1057: my @ids=&Apache::lonnet::current_machine_ids();
1058: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1059: if (!$allowed) {
1060: $button=0;
1061: $switchserver='otherserver='.$home.'&role='.$trolecode;
1062: }
1063: #next if ($home eq 'no_host');
1064: $home = &Apache::lonnet::hostname($home);
1065: $ttype='Construction Space';
1066: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
1067: ': '.$home;
1068: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1069: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
1070: $sortkey=$role;
1071: } elsif ($trest) {
1072: my $tcourseid=$tdom.'_'.$trest;
1073: $ttype = &Apache::loncommon::course_type($tcourseid);
1074: $trole = &Apache::lonnet::plaintext($role,$ttype);
1075: if ($env{'course.'.$tcourseid.'.description'}) {
1076: $twhere=$env{'course.'.$tcourseid.'.description'};
1077: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1078: unless ($twhere eq &mt('Currently not available')) {
1079: $twhere.=' <span class="LC_fontsize_small">'.
1080: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1081: '</span>';
1082: }
1083: } else {
1084: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1085: if (%newhash) {
1086: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
1087: "\0".$envkey;
1088: $twhere=$newhash{'description'}.
1089: ' <span class="LC_fontsize_small">'.
1090: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1091: '</span>';
1092: $ttype = $newhash{'type'};
1093: $trole = &Apache::lonnet::plaintext($role,$ttype);
1094: } else {
1095: $twhere=&mt('Currently not available');
1096: $env{'course.'.$tcourseid.'.description'}=$twhere;
1097: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1098: $ttype = 'Unavailable';
1099: }
1100: }
1101: if ($tsection) {
1102: $twhere.='<br />'.&mt('Section').': '.$tsection;
1103: }
1104: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
1105: } elsif ($tdom) {
1106: $ttype='Domain';
1107: $twhere=$tdom;
1108: $sortkey=$role.$twhere;
1109: } else {
1110: $ttype='System';
1111: $twhere=&mt('system wide');
1112: $sortkey=$role.$twhere;
1113: }
1114: ($role_text,$role_text_end) =
1115: &build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,
1116: $advanced,$tremark,$tbg,$trole,$twhere,$tpstart,
1117: $tpend,$nochoose,$button,$switchserver,$reinit);
1118: $roletext->{$envkey}=[$role_text,$role_text_end];
1119: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
1120: $sortrole->{$sortkey}=$envkey;
1121: $roleclass->{$envkey}=$ttype;
1122: }
1123: }
1124: }
1125: return ($countactive,$countfuture,$inrole,$possiblerole);
1126: }
1127:
1128: sub role_timezone {
1129: my ($where,$timezones) = @_;
1130: my $timezone;
1131: if (ref($timezones) eq 'HASH') {
1132: if ($where =~ m{^/($match_domain)/($match_courseid)}) {
1133: my $cdom = $1;
1134: my $cnum = $2;
1135: if ($cdom && $cnum) {
1136: if (!exists($timezones->{$cdom.'_'.$cnum})) {
1137: my %timehash =
1138: &Apache::lonnet::get('environment',['timezone'],$cdom,$cnum);
1139: if ($timehash{'timezone'} eq '') {
1140: if (!exists($timezones->{$cdom})) {
1141: my %domdefaults =
1142: &Apache::lonnet::get_domain_defaults($cdom);
1143: if ($domdefaults{'timezone_def'} eq '') {
1144: $timezones->{$cdom} = 'local';
1145: } else {
1146: $timezones->{$cdom} = $domdefaults{'timezone_def'};
1147: }
1148: }
1149: $timezones->{$cdom.'_'.$cnum} = $timezones->{$cdom};
1150: } else {
1151: $timezones->{$cdom.'_'.$cnum} =
1152: &Apache::lonlocal::gettimezone($timehash{'timezone'});
1153: }
1154: }
1155: $timezone = $timezones->{$cdom.'_'.$cnum};
1156: }
1157: } else {
1158: my ($tdom) = ($where =~ m{^/($match_domain)});
1159: if ($tdom) {
1160: if (!exists($timezones->{$tdom})) {
1161: my %domdefaults = &Apache::lonnet::get_domain_defaults($tdom);
1162: if ($domdefaults{'timezone_def'} eq '') {
1163: $timezones->{$tdom} = 'local';
1164: } else {
1165: $timezones->{$tdom} = $domdefaults{'timezone_def'};
1166: }
1167: }
1168: $timezone = $timezones->{$tdom};
1169: }
1170: }
1171: if ($timezone eq 'local') {
1172: $timezone = undef;
1173: }
1174: }
1175: return $timezone;
1176: }
1177:
1178: sub roletable_headers {
1179: my ($r,$roleclass,$sortrole,$nochoose) = @_;
1180: my $doheaders;
1181: if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
1182: $r->print('<br />'
1183: .&Apache::loncommon::start_data_table()
1184: .&Apache::loncommon::start_data_table_header_row()
1185: );
1186: if (!$nochoose) { $r->print('<th> </th>'); }
1187: $r->print('<th>'.&mt('User Role').'</th>'
1188: .'<th>'.&mt('Extent').'</th>'
1189: .'<th>'.&mt('Start').'</th>'
1190: .'<th>'.&mt('End').'</th>'
1191: .&Apache::loncommon::end_data_table_header_row()
1192: );
1193: $doheaders=-1;
1194: my @roletypes = &roletypes();
1195: foreach my $type (@roletypes) {
1196: my $haverole=0;
1197: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1198: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1199: $haverole=1;
1200: }
1201: }
1202: if ($haverole) { $doheaders++; }
1203: }
1204: }
1205: return $doheaders;
1206: }
1207:
1208: sub roletypes {
1209: my @types = ('Domain','Construction Space','Course','Community','Unavailable','System');
1210: return @types;
1211: }
1212:
1213: sub print_rolerows {
1214: my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
1215: if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
1216: my @types = &roletypes();
1217: foreach my $type (@types) {
1218: my $output;
1219: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1220: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1221: if (ref($roletext) eq 'HASH') {
1222: if (ref($roletext->{$sortrole->{$which}}) eq 'ARRAY') {
1223: $output.= &Apache::loncommon::start_data_table_row().
1224: $roletext->{$sortrole->{$which}}->[0].
1225: &Apache::loncommon::end_data_table_row().
1226: &Apache::loncommon::continue_data_table_row().
1227: $roletext->{$sortrole->{$which}}->[1].
1228: &Apache::loncommon::end_data_table_row();
1229: }
1230: if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
1231: if (ref($dcroles) eq 'HASH') {
1232: if ($dcroles->{$1}) {
1233: $output .= &adhoc_roles_row($1,'');
1234: }
1235: }
1236: }
1237: }
1238: }
1239: }
1240: if ($output) {
1241: if ($doheaders > 0) {
1242: $r->print(&Apache::loncommon::start_data_table_empty_row()
1243: .'<td align="center" colspan="5">'
1244: .&mt($type)
1245: .'</td>'
1246: .&Apache::loncommon::end_data_table_empty_row()
1247: );
1248: }
1249: $r->print($output);
1250: }
1251: }
1252: }
1253: }
1254:
1255: sub findcourse_advice {
1256: my ($r) = @_;
1257: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1258: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1259: if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
1260: $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
1261: <ul>
1262: <li>'.&mt('The course has yet to be created.').'</li>
1263: <li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
1264: <li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
1265: <li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
1266: <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>
1267: </ul>');
1268: } else {
1269: $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 />');
1270: }
1271: $r->print('<h3>'.&mt('Self-Enrollment').'</h3>'.
1272: '<p>'.&mt('The [_1]Course/Community Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created, as well as any communities in the domain.','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a>',$domdesc).'<br />');
1273: $r->print(&mt('You can search for courses and communities which permit self-enrollment, if you would like to enroll in one.').'</p>');
1274: &queued_selfenrollment($r);
1275: return;
1276: }
1277:
1278: sub requestcourse_advice {
1279: my ($r) = @_;
1280: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1281: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1282: my (%can_request,%request_doms);
1283: &Apache::lonnet::check_can_request($env{'user.domain'},\%can_request,\%request_doms);
1284: if (keys(%request_doms) > 0) {
1285: my ($types,$typename) = &Apache::loncommon::course_types();
1286: if ((ref($types) eq 'ARRAY') && (ref($typename) eq 'HASH')) {
1287: $r->print('<h3>'.&mt('Request creation of a course or community').'</h3>'.
1288: '<p>'.&mt('You have rights to request the creation of courses and/or communities in the following domain(s):').'<ul>');
1289: my (@reqdoms,@reqtypes);
1290: foreach my $type (sort(keys(%request_doms))) {
1291: push(@reqtypes,$type);
1292: if (ref($request_doms{$type}) eq 'ARRAY') {
1293: my $domstr = join(', ',map { &Apache::lonnet::domain($_) } sort(@{$request_doms{$type}}));
1294: $r->print(
1295: '<li>'
1296: .&mt('[_1]'.$typename->{$type}.'[_2] in domain: [_3]',
1297: '<i>',
1298: '</i>',
1299: '<b>'.$domstr.'</b>')
1300: .'</li>'
1301: );
1302: foreach my $dom (@{$request_doms{$type}}) {
1303: unless (grep(/^\Q$dom\E/,@reqdoms)) {
1304: push(@reqdoms,$dom);
1305: }
1306: }
1307: }
1308: }
1309: my @showtypes;
1310: foreach my $type (@{$types}) {
1311: if (grep(/^\Q$type\E$/,@reqtypes)) {
1312: push(@showtypes,$type);
1313: }
1314: }
1315: my $requrl = '/adm/requestcourse';
1316: if (@reqdoms == 1) {
1317: $requrl .= '?showdom='.$reqdoms[0];
1318: }
1319: if (@showtypes > 0) {
1320: $requrl.=(($requrl=~/\?/)?'&':'?').'crstype='.$showtypes[0];
1321: }
1322: if (@reqdoms == 1 || @showtypes > 0) {
1323: $requrl .= '&state=crstype&action=new';
1324: }
1325: $r->print('</ul>'.&mt('Use the [_1]request form[_2] to submit a request for creation of a new course or community.','<a href="'.$requrl.'">','</a>').'</p>');
1326: }
1327: }
1328: return;
1329: }
1330:
1331: sub queued_selfenrollment {
1332: my ($r) = @_;
1333: my %selfenrollrequests = &Apache::lonnet::dump('selfenrollrequests');
1334: my %reqs_by_date;
1335: foreach my $item (keys(%selfenrollrequests)) {
1336: if (ref($selfenrollrequests{$item}) eq 'HASH') {
1337: if ($selfenrollrequests{$item}{'status'} eq 'request') {
1338: if ($selfenrollrequests{$item}{'timestamp'}) {
1339: push(@{$reqs_by_date{$selfenrollrequests{$item}{'timestamp'}}},$item);
1340: }
1341: }
1342: }
1343: }
1344: if (keys(%reqs_by_date)) {
1345: my $rolename = &Apache::lonnet::plaintext('st');
1346: $r->print('<b>'.&mt('Enrollment requests pending Course Coordinator approval').'</b><br />'.
1347: &Apache::loncommon::start_data_table().
1348: &Apache::loncommon::start_data_table_header_row().
1349: '<th>'.&mt('Date requested').'</th><th>'.&mt('Course title').'</th>'.
1350: '<th>'.&mt('User role').'</th><th>'.&mt('Section').'</th>'.
1351: &Apache::loncommon::end_data_table_header_row());
1352: my @sorted = sort { $a <=> $b } (keys(%reqs_by_date));
1353: foreach my $item (@sorted) {
1354: if (ref($reqs_by_date{$item}) eq 'ARRAY') {
1355: foreach my $crs (@{$reqs_by_date{$item}}) {
1356: my %courseinfo = &Apache::lonnet::coursedescription($crs);
1357: my $usec = $selfenrollrequests{$crs}{'section'};
1358: if ($usec eq '') {
1359: $usec = &mt('No section');
1360: }
1361: $r->print(&Apache::loncommon::start_data_table_row().
1362: '<td>'.&Apache::lonlocal::locallocaltime($item).'</td>'.
1363: '<td>'.$courseinfo{'description'}.'</td>'.
1364: '<td>'.$rolename.'</td><td>'.$usec.'</td>'.
1365: &Apache::loncommon::end_data_table_row());
1366: }
1367: }
1368: }
1369: $r->print(&Apache::loncommon::end_data_table());
1370: }
1371: return;
1372: }
1373:
1374: sub privileges_info {
1375: my ($which) = @_;
1376: my $output;
1377:
1378: $which ||= $env{'request.role'};
1379:
1380: foreach my $envkey (sort(keys(%env))) {
1381: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
1382:
1383: my $where=$1;
1384: my $ttype;
1385: my $twhere;
1386: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
1387: if ($trest) {
1388: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
1389: $ttype='Construction Space';
1390: $twhere='User: '.$trest.', Domain: '.$tdom;
1391: } else {
1392: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
1393: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
1394: if ($tsec) {
1395: my $sec_type = 'Section';
1396: if (exists($env{"user.role.gr.$where"})) {
1397: $sec_type = 'Group';
1398: }
1399: $twhere.=' ('.$sec_type.': '.$tsec.')';
1400: }
1401: }
1402: } elsif ($tdom) {
1403: $ttype='Domain';
1404: $twhere=$tdom;
1405: } else {
1406: $ttype='System';
1407: $twhere='/';
1408: }
1409: $output .= "\n<h3>".&mt($ttype).': '.$twhere.'</h3>'."\n<ul>";
1410: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
1411: next if (!$priv);
1412:
1413: my ($prv,$restr)=split(/\&/,$priv);
1414: my $trestr='';
1415: if ($restr ne 'F') {
1416: $trestr.=' ('.
1417: join(', ',
1418: map { &Apache::lonnet::plaintext($_) }
1419: (split('',$restr))).') ';
1420: }
1421: $output .= "\n\t".
1422: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
1423: }
1424: $output .= "\n".'</ul>';
1425: }
1426: return $output;
1427: }
1428:
1429: sub build_roletext {
1430: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit) = @_;
1431: my ($roletext,$roletext_end);
1432: my $is_dc=($trolecode =~ m/^dc\./);
1433: my $rowspan=($is_dc) ? ''
1434: : ' rowspan="2" ';
1435:
1436: unless ($nochoose) {
1437: my $buttonname=$trolecode;
1438: $buttonname=~s/\W//g;
1439: if (!$button) {
1440: if ($switchserver) {
1441: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'
1442: .'<a href="/adm/switchserver?'.$switchserver.'">'
1443: .&mt('Switch Server')
1444: .'</a></td>';
1445: } else {
1446: $roletext.=('<td'.$rowspan.' class="'.$tbg.'"> </td>');
1447: }
1448: } elsif ($tstatus eq 'is') {
1449: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'.
1450: '<input name="'.$buttonname.'" type="button" value="'.
1451: &mt('Select').'" onclick="javascript:enterrole(this.form,\''.
1452: $trolecode."','".$buttonname.'\');" /></td>';
1453: } elsif ($tryagain) {
1454: $roletext.=
1455: '<td'.$rowspan.' class="'.$tbg.'">'.
1456: '<input name="'.$buttonname.'" type="button" value="'.
1457: &mt('Try Selecting Again').'" onclick="javascript:enterrole(this.form,\''.
1458: $trolecode."','".$buttonname.'\');" /></td>';
1459: } elsif ($advanced) {
1460: $roletext.=
1461: '<td'.$rowspan.' class="'.$tbg.'">'.
1462: '<input name="'.$buttonname.'" type="button" value="'.
1463: &mt('Re-Initialize').'" onclick="javascript:enterrole(this.form,\''.
1464: $trolecode."','".$buttonname.'\');" /></td>';
1465: } elsif ($reinit) {
1466: $roletext.=
1467: '<td'.$rowspan.' class="'.$tbg.'">'.
1468: '<input name="'.$buttonname.'" type="button" value="'.
1469: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1470: $trolecode."','".$buttonname.'\');" /></td>';
1471: } else {
1472: $roletext.=
1473: '<td'.$rowspan.' class="'.$tbg.'">'.
1474: '<input name="'.$buttonname.'" type="button" value="'.
1475: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1476: $trolecode."','".$buttonname.'\');" /></td>';
1477: }
1478: }
1479: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
1480: $tremark.=&Apache::lonannounce::showday(time,1,
1481: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
1482: }
1483: $roletext.='<td>'.$trole.'</td>'
1484: .'<td>'.$twhere.'</td>'
1485: .'<td>'.$tpstart.'</td>'
1486: .'<td>'.$tpend.'</td>';
1487: if (!$is_dc) {
1488: $roletext_end = '<td colspan="4">'.
1489: $tremark.' '.
1490: '</td>';
1491: }
1492: return ($roletext,$roletext_end);
1493: }
1494:
1495: sub check_needs_switchserver {
1496: my ($possiblerole) = @_;
1497: my $needs_switchserver;
1498: my ($role,$where) = split(/\./,$possiblerole,2);
1499: my (undef,$tdom,$twho) = split(/\//,$where);
1500: my ($server_status,$home);
1501: if (($role eq 'ca') || ($role eq 'aa')) {
1502: ($server_status,$home) = &check_author_homeserver($twho,$tdom);
1503: } else {
1504: ($server_status,$home) = &check_author_homeserver($env{'user.name'},
1505: $env{'user.domain'});
1506: }
1507: if ($server_status eq 'switchserver') {
1508: $needs_switchserver = 1;
1509: }
1510: return $needs_switchserver;
1511: }
1512:
1513: sub check_author_homeserver {
1514: my ($uname,$udom)=@_;
1515: if (($uname eq '') || ($udom eq '')) {
1516: return ('fail','');
1517: }
1518: my $home = &Apache::lonnet::homeserver($uname,$udom);
1519: if (&Apache::lonnet::host_domain($home) ne $udom) {
1520: return ('fail',$home);
1521: }
1522: my @ids=&Apache::lonnet::current_machine_ids();
1523: if (grep(/^\Q$home\E$/,@ids)) {
1524: return ('ok',$home);
1525: } else {
1526: return ('switchserver',$home);
1527: }
1528: }
1529:
1530: sub check_fordc {
1531: my ($dcroles,$then) = @_;
1532: my $numdc = 0;
1533: if ($env{'user.adv'}) {
1534: foreach my $envkey (sort keys %env) {
1535: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
1536: my $dcdom = $1;
1537: my $livedc = 1;
1538: my ($tstart,$tend)=split(/\./,$env{$envkey});
1539: if ($tstart && $tstart>$then) { $livedc = 0; }
1540: if ($tend && $tend <$then) { $livedc = 0; }
1541: if ($livedc) {
1542: $$dcroles{$dcdom} = $envkey;
1543: $numdc++;
1544: }
1545: }
1546: }
1547: }
1548: return $numdc;
1549: }
1550:
1551: sub adhoc_course_role {
1552: my ($refresh,$then) = @_;
1553: my ($cdom,$cnum,$crstype);
1554: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1555: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1556: $crstype = &Apache::loncommon::course_type();
1557: if (&check_forcc($cdom,$cnum,$refresh,$then,$crstype)) {
1558: my $setprivs;
1559: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
1560: $setprivs = 1;
1561: } else {
1562: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
1563: if (($start && ($start>$refresh || $start == -1)) ||
1564: ($end && $end<$then)) {
1565: $setprivs = 1;
1566: }
1567: }
1568: if ($setprivs) {
1569: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
1570: my $role = $1;
1571: my $custom_role = $2;
1572: my $usec = $3;
1573: if ($role eq 'cr') {
1574: if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
1575: $role .= $custom_role;
1576: } else {
1577: return;
1578: }
1579: }
1580: my (%userroles,%newrole,%newgroups,%group_privs);
1581: my %cgroups =
1582: &Apache::lonnet::get_active_groups($env{'user.domain'},
1583: $env{'user.name'},$cdom,$cnum);
1584: foreach my $group (keys(%cgroups)) {
1585: $group_privs{$group} =
1586: $env{'user.priv.cc./'.$cdom.'/'.$cnum.'./'.$cdom.'/'.$cnum.'/'.$group};
1587: }
1588: $newgroups{'/'.$cdom.'/'.$cnum} = \%group_privs;
1589: my $area = '/'.$cdom.'/'.$cnum;
1590: my $spec = $role.'.'.$area;
1591: if ($usec ne '') {
1592: $spec .= '/'.$usec;
1593: $area .= '/'.$usec;
1594: }
1595: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1596: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,\%newgroups);
1597: my $adhocstart = $refresh-1;
1598: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1599: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1600: }
1601: }
1602: }
1603: return;
1604: }
1605:
1606: sub check_forcc {
1607: my ($cdom,$cnum,$refresh,$then,$crstype) = @_;
1608: my ($is_cc,$ccrole);
1609: if ($crstype eq 'Community') {
1610: $ccrole = 'co';
1611: } else {
1612: $ccrole = 'cc';
1613: }
1614: if ($cdom ne '' && $cnum ne '') {
1615: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1616: my $envkey = 'user.role.'.$ccrole.'./'.$cdom.'/'.$cnum;
1617: if (defined($env{$envkey})) {
1618: $is_cc = 1;
1619: my ($tstart,$tend)=split(/\./,$env{$envkey});
1620: if ($tstart && $tstart>$refresh) { $is_cc = 0; }
1621: if ($tend && $tend <$then) { $is_cc = 0; }
1622: }
1623: }
1624: }
1625: return $is_cc;
1626: }
1627:
1628: sub courselink {
1629: my ($dcdom,$rowtype) = @_;
1630: my $courseform=&Apache::loncommon::selectcourse_link
1631: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1632: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1633: $dcdom,$dcdom,undef,'Course/Community');
1634: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1635: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1636: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1637: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1638: return $courseform.$hiddenitems;
1639: }
1640:
1641: sub coursepick_jscript {
1642: my %lt = &Apache::lonlocal::texthash(
1643: 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.",
1644: youc => 'You can only use this screen to select courses and communities in the current domain.',
1645: );
1646: my $verify_script = <<"END";
1647: <script type="text/javascript">
1648: // <![CDATA[
1649: function verifyCoursePick(caller) {
1650: var numbutton = getIndex(caller)
1651: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1652: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1653: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1654: if (pickedCourse != '') {
1655: if (numbutton != -1) {
1656: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1657: document.rolechoice.elements[numbutton+1].name = courseTarget
1658: document.rolechoice.submit()
1659: }
1660: }
1661: else {
1662: alert("$lt{'plsu'}");
1663: }
1664: }
1665: else {
1666: alert("$lt{'youc'}")
1667: }
1668: }
1669: function getIndex(caller) {
1670: for (var i=0;i<document.rolechoice.elements.length;i++) {
1671: if (document.rolechoice.elements[i] == caller) {
1672: return i;
1673: }
1674: }
1675: return -1;
1676: }
1677: // ]]>
1678: </script>
1679: END
1680: return $verify_script;
1681: }
1682:
1683: sub coauthorlink {
1684: my ($dcdom,$rowtype) = @_;
1685: my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
1686: my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
1687: return $coauthorform.$hiddenitems;
1688: }
1689:
1690: sub display_cc_role {
1691: my $rolekey = shift;
1692: my ($roletext,$roletext_end);
1693: my $advanced = $env{'user.adv'};
1694: my $tryagain = $env{'form.tryagain'};
1695: unless ($rolekey =~/^error\:/) {
1696: if ($rolekey =~ m{^user\.role\.(cc|co)\./($match_domain)/($match_courseid)$}) {
1697: my $ccrole = $1;
1698: my $tcourseid = $2.'_'.$3;
1699: my $trolecode = $1.'./'.$2.'/'.$3;
1700: my $twhere;
1701: my $ttype;
1702: my $tbg='LC_roles_is';
1703: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1704: if (%newhash) {
1705: $twhere=$newhash{'description'}.
1706: ' <span style="LC_fontsize_small">'.
1707: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1).
1708: '</span>';
1709: $ttype = $newhash{'type'};
1710: } else {
1711: $twhere=&mt('Currently not available');
1712: $env{'course.'.$tcourseid.'.description'}=$twhere;
1713: }
1714: my $trole = &Apache::lonnet::plaintext($ccrole,$ttype);
1715: $twhere.="<br />".&mt('Domain').":".$1;
1716: ($roletext,$roletext_end) = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$trole,$twhere,'','','',1,'');
1717: }
1718: }
1719: return ($roletext,$roletext_end);
1720: }
1721:
1722: sub adhoc_roles_row {
1723: my ($dcdom,$rowtype) = @_;
1724: my $output = &Apache::loncommon::continue_data_table_row()
1725: .' <td colspan="5">'
1726: .&mt('[_1]Ad hoc[_2] roles in domain [_3] --'
1727: ,'<span class="LC_cusr_emph">','</span>',$dcdom)
1728: .' ';
1729: my $selectcclink = &courselink($dcdom,$rowtype);
1730: my $ccrole = &Apache::lonnet::plaintext('co',undef,undef,1);
1731: my $carole = &Apache::lonnet::plaintext('ca');
1732: my $selectcalink = &coauthorlink($dcdom,$rowtype);
1733: $output.=$ccrole.': '.$selectcclink
1734: .' | '.$carole.': '.$selectcalink
1735: .&Apache::loncommon::end_data_table_row();
1736: return $output;
1737: }
1738:
1739: sub recent_filename {
1740: my $area=shift;
1741: return 'nohist_recent_'.&escape($area);
1742: }
1743:
1744: sub courseloadpage {
1745: my ($courseid) = @_;
1746: my $startpage;
1747: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1748: [$courseid.':courseinit']);
1749: my ($tmp) = %entry_settings;
1750: unless ($tmp =~ /^error: 2 /) {
1751: $startpage = $entry_settings{$courseid.':courseinit'};
1752: }
1753: if ($startpage eq '') {
1754: if (exists($env{'environment.course_init_display'})) {
1755: $startpage = $env{'environment.course_init_display'};
1756: }
1757: }
1758: return $startpage;
1759: }
1760:
1761: 1;
1762: __END__
1763:
1764: =head1 NAME
1765:
1766: Apache::lonroles - User Roles Screen
1767:
1768: =head1 SYNOPSIS
1769:
1770: Invoked by /etc/httpd/conf/srm.conf:
1771:
1772: <Location /adm/roles>
1773: PerlAccessHandler Apache::lonacc
1774: SetHandler perl-script
1775: PerlHandler Apache::lonroles
1776: ErrorDocument 403 /adm/login
1777: ErrorDocument 500 /adm/errorhandler
1778: </Location>
1779:
1780: =head1 OVERVIEW
1781:
1782: =head2 Choosing Roles
1783:
1784: C<lonroles> is a handler that allows a user to switch roles in
1785: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1786: default role that a user has before selecting a role, as widely as
1787: possible, but certain handlers for example need specification which
1788: course they should act on, etc. Both in this scenario, and when the
1789: handler determines via C<lonnet>'s C<&allowed> function that a certain
1790: action is not allowed, C<lonroles> is used as error handler. This
1791: allows the user to select another role which may have permission to do
1792: what they were trying to do. C<lonroles> can also be accessed via the
1793: B<CRS> button in the Remote Control.
1794:
1795: =begin latex
1796:
1797: \begin{figure}
1798: \begin{center}
1799: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1800: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1801: \end{center}
1802: \end{figure}
1803:
1804: =end latex
1805:
1806: =head2 Role Initialization
1807:
1808: 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.
1809:
1810: =head1 INTRODUCTION
1811:
1812: This module enables a user to select what role he wishes to
1813: operate under (instructor, student, teaching assistant, course
1814: coordinator, etc). These roles are pre-established by the actions
1815: of upper-level users.
1816:
1817: This is part of the LearningOnline Network with CAPA project
1818: described at http://www.lon-capa.org.
1819:
1820: =head1 HANDLER SUBROUTINE
1821:
1822: This routine is called by Apache and mod_perl.
1823:
1824: =over 4
1825:
1826: =item *
1827:
1828: Roles Initialization (yes/no)
1829:
1830: =item *
1831:
1832: Get Error Message from Environment
1833:
1834: =item *
1835:
1836: Who is this?
1837:
1838: =item *
1839:
1840: Generate Page Output
1841:
1842: =item *
1843:
1844: Choice or no choice
1845:
1846: =item *
1847:
1848: Table
1849:
1850: =item *
1851:
1852: Privileges
1853:
1854: =back
1855:
1856: =cut
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