1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.240.2.9 2010/01/15 05:30:21 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 Apache::loncoursequeueadmin;
143: use GDBM_File;
144: use LONCAPA qw(:DEFAULT :match);
145: use HTML::Entities;
146:
147:
148: sub redirect_user {
149: my ($r,$title,$url,$msg,$launch_nav) = @_;
150: $msg = $title if (! defined($msg));
151: &Apache::loncommon::content_type($r,'text/html');
152: &Apache::loncommon::no_cache($r);
153: $r->send_http_header;
154: my $swinfo=&Apache::lonmenu::rawconfig();
155: my $navwindow;
156: if ($launch_nav eq 'on') {
157: $navwindow.=&Apache::lonnavdisplay::launch_win('now',undef,undef,
158: ($url =~ m-^/adm/whatsnew-));
159: } else {
160: $navwindow.=&Apache::lonnavmaps::close();
161: }
162:
163: # Breadcrumbs
164: my $brcrum = [{'href' => $url,
165: 'text' => 'Switching Role'},];
166: my $start_page = &Apache::loncommon::start_page('Switching Role',undef,
167: {'redirect' => [1,$url],
168: 'bread_crumbs' => $brcrum,});
169: &Apache::lonhtmlcommon::clear_breadcrumbs();
170: my $end_page = &Apache::loncommon::end_page();
171:
172: # Note to style police:
173: # This must only replace the spaces, nothing else, or it bombs elsewhere.
174: $url=~s/ /\%20/g;
175: $r->print(<<ENDREDIR);
176: $start_page
177: <script type="text/javascript">
178: // <![CDATA[
179: $swinfo
180: // ]]>
181: </script>
182: $navwindow
183: <p>$msg</p>
184: $end_page
185: ENDREDIR
186: return;
187: }
188:
189: sub error_page {
190: my ($r,$error,$dest)=@_;
191: &Apache::loncommon::content_type($r,'text/html');
192: &Apache::loncommon::no_cache($r);
193: $r->send_http_header;
194: return OK if $r->header_only;
195: # Breadcrumbs
196: my $brcrum = [{'href' => $dest,
197: 'text' => 'Problems during Course Initialization'},];
198: $r->print(&Apache::loncommon::start_page('Problems during Course Initialization',
199: undef,
200: {'bread_crumbs' => $brcrum,})
201: );
202: $r->print(
203: '<script type="text/javascript">'.
204: '// <![CDATA['.
205: &Apache::lonmenu::rawconfig().
206: '// ]]>'.
207: '</script>'.
208: '<p class="LC_error">'.&mt('The following problems occurred:').
209: '<br />'.
210: $error.
211: '</p><br /><a href="'.$dest.'">'.&mt('Continue').'</a>'
212: );
213: $r->print(&Apache::loncommon::end_page());
214: }
215:
216: sub handler {
217:
218: my $r = shift;
219:
220: my $now=time;
221: my $then=$env{'user.login.time'};
222: my $refresh=$env{'user.refresh.time'};
223: if (!$refresh) {
224: $refresh = $then;
225: }
226: my $envkey;
227: my %dcroles = ();
228: my $numdc = &check_fordc(\%dcroles,$then);
229: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
230: my $custommenu = &Apache::loncommon::needs_gci_custom();
231:
232: # ================================================================== Roles Init
233: if ($env{'form.selectrole'}) {
234:
235: my $locknum=&Apache::lonnet::get_locks();
236: if ($locknum) { return 409; }
237:
238: if ($env{'form.newrole'}) {
239: $env{'form.'.$env{'form.newrole'}}=1;
240: }
241: if ($env{'request.course.id'}) {
242: # Check if user is CC trying to select a course role
243: if ($env{'form.switchrole'}) {
244: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
245: &adhoc_course_role($refresh,$then);
246: }
247: }
248: my %temp=('logout_'.$env{'request.course.id'} => time);
249: &Apache::lonnet::put('email_status',\%temp);
250: &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
251: }
252: &Apache::lonnet::appenv({"request.course.id" => '',
253: "request.course.fn" => '',
254: "request.course.uri" => '',
255: "request.course.sec" => '',
256: "request.role" => 'cm',
257: "request.role.adv" => $env{'user.adv'},
258: "request.role.domain" => $env{'user.domain'}});
259: # Check if user is a DC trying to enter a course or author space and needs privs to be created
260: if ($numdc > 0) {
261: foreach my $envkey (keys %env) {
262: # Is this an ad-hoc Coordinator role?
263: if (my ($ccrole,$domain,$coursenum) =
264: ($envkey =~ m-^form\.(cc|co)\./($match_domain)/($match_courseid)$-)) {
265: if ($dcroles{$domain}) {
266: &Apache::lonnet::check_adhoc_privs($domain,$coursenum,
267: $then,$refresh,$now,$ccrole);
268: }
269: last;
270: }
271: # Is this an ad-hoc CA-role?
272: if (my ($domain,$user) =
273: ($envkey =~ m-^form\.ca\./($match_domain)/($match_username)$-)) {
274: if (($domain eq $env{'user.domain'}) && ($user eq $env{'user.name'})) {
275: delete($env{$envkey});
276: $env{'form.au./'.$domain.'/'} = 1;
277: my ($server_status,$home) = &check_author_homeserver($user,$domain);
278: if ($server_status eq 'switchserver') {
279: my $trolecode = 'au./'.$domain.'/';
280: my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
281: $r->internal_redirect($switchserver);
282: }
283: last;
284: }
285: if (my ($castart,$caend) = ($env{'user.role.ca./'.$domain.'/'.$user} =~ /^(\d*)\.(\d*)$/)) {
286: if (((($castart) && ($castart < $now)) || !$castart) &&
287: ((!$caend) || (($caend) && ($caend > $now)))) {
288: my ($server_status,$home) = &check_author_homeserver($user,$domain);
289: if ($server_status eq 'switchserver') {
290: my $trolecode = 'ca./'.$domain.'/'.$user;
291: my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
292: $r->internal_redirect($switchserver);
293: }
294: last;
295: }
296: }
297: # Check if author blocked ca-access
298: my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],$domain,$user);
299: if ($blocked{'domcoord.author'} eq 'blocked') {
300: delete($env{$envkey});
301: $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
302: last;
303: }
304: if ($dcroles{$domain}) {
305: my ($server_status,$home) = &check_author_homeserver($user,$domain);
306: if (($server_status eq 'ok') || ($server_status eq 'switchserver')) {
307: &Apache::lonnet::check_adhoc_privs($domain,$user,$then,
308: $refresh,$now,'ca');
309: if ($server_status eq 'switchserver') {
310: my $trolecode = 'ca./'.$domain.'/'.$user;
311: my $switchserver = '/adm/switchserver?'
312: .'otherserver='.$home.'&role='.$trolecode;
313: $r->internal_redirect($switchserver);
314: }
315: } else {
316: delete($env{$envkey});
317: }
318: } else {
319: delete($env{$envkey});
320: }
321: last;
322: }
323: }
324: }
325: if (($env{'form.cm'}) && ($env{'form.orgurl'})) {
326: $r->internal_redirect($env{'form.orgurl'});
327: }
328: foreach $envkey (keys %env) {
329: next if ($envkey!~/^user\.role\./);
330: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
331: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
332: \$trolecode,\$tstatus,\$tstart,\$tend);
333: if ($env{'form.'.$trolecode}) {
334: if ($tstatus eq 'is') {
335: $where=~s/^\///;
336: my ($cdom,$cnum,$csec)=split(/\//,$where);
337: # check for course groups
338: my %coursegroups = &Apache::lonnet::get_active_groups(
339: $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
340: my $cgrps = join(':',keys(%coursegroups));
341:
342: # store role if recent_role list being kept
343: if ($env{'environment.recentroles'}) {
344: my %frozen_roles =
345: &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
346: &Apache::lonhtmlcommon::store_recent('roles',
347: $trolecode,' ',$frozen_roles{$trolecode});
348: }
349:
350:
351: # check for keyed access
352: if (($role eq 'st') &&
353: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
354: # who is key authority?
355: my $authdom=$cdom;
356: my $authnum=$cnum;
357: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
358: ($authnum,$authdom)=
359: split(/:/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
360: }
361: # check with key authority
362: unless (&Apache::lonnet::validate_access_key(
363: $env{'environment.key.'.$cdom.'_'.$cnum},
364: $authdom,$authnum)) {
365: # there is no valid key
366: if ($env{'form.newkey'}) {
367: # student attempts to register a new key
368: &Apache::loncommon::content_type($r,'text/html');
369: &Apache::loncommon::no_cache($r);
370: $r->send_http_header;
371: my $swinfo=&Apache::lonmenu::rawconfig();
372: my $start_page=&Apache::loncommon::start_page
373: ('Verifying Access Key to Unlock this Course');
374: my $end_page=&Apache::loncommon::end_page();
375: my $buttontext=&mt('Enter Course');
376: my $message=&mt('Successfully registered key');
377: my $assignresult=
378: &Apache::lonnet::assign_access_key(
379: $env{'form.newkey'},
380: $authdom,$authnum,
381: $cdom,$cnum,
382: $env{'user.domain'},
383: $env{'user.name'},
384: &mt('Assigned from [_1] at [_2] for [_3]'
385: ,$ENV{'REMOTE_ADDR'}
386: ,&Apache::lonlocal::locallocaltime()
387: ,$trolecode)
388: );
389: unless ($assignresult eq 'ok') {
390: $assignresult=~s/^error\:\s*//;
391: $message=&mt($assignresult).
392: '<br /><a href="/adm/logout">'.
393: &mt('Logout').'</a>';
394: $buttontext=&mt('Re-Enter Key');
395: }
396: $r->print(<<ENDENTEREDKEY);
397: $start_page
398: <script type="text/javascript">
399: // <![CDATA[
400: $swinfo
401: // ]]>
402: </script>
403: <form action="" method="post">
404: <input type="hidden" name="selectrole" value="1" />
405: <input type="hidden" name="$trolecode" value="1" />
406: <span class="LC_fontsize_large">$message</span><br />
407: <input type="submit" value="$buttontext" />
408: </form>
409: $end_page
410: ENDENTEREDKEY
411: return OK;
412: } else {
413: # print form to enter a new key
414: &Apache::loncommon::content_type($r,'text/html');
415: &Apache::loncommon::no_cache($r);
416: $r->send_http_header;
417: my $swinfo=&Apache::lonmenu::rawconfig();
418: my $start_page=&Apache::loncommon::start_page
419: ('Enter Access Key to Unlock this Course');
420: my $end_page=&Apache::loncommon::end_page();
421: $r->print(<<ENDENTERKEY);
422: $start_page
423: <script type="text/javascript">
424: // <![CDATA[
425: $swinfo
426: // ]]>
427: </script>
428: <form action="" method="post">
429: <input type="hidden" name="selectrole" value="1" />
430: <input type="hidden" name="$trolecode" value="1" />
431: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
432: <input type="submit" value="Enter key" />
433: </form>
434: $end_page
435: ENDENTERKEY
436: return OK;
437: }
438: }
439: }
440: &Apache::lonnet::log($env{'user.domain'},
441: $env{'user.name'},
442: $env{'user.home'},
443: "Role ".$trolecode);
444:
445: &Apache::lonnet::appenv(
446: {'request.role' => $trolecode,
447: 'request.role.domain' => $cdom,
448: 'request.course.sec' => $csec,
449: 'request.course.groups' => $cgrps});
450: my $tadv=0;
451:
452: if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
453: my $msg;
454: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
455: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
456: my ($furl,$ferr)=
457: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
458: if (($env{'form.orgurl'}) &&
459: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
460: my $dest=$env{'form.orgurl'};
461: if ($env{'form.symb'}) {
462: if ($dest =~ /\?/) {
463: $dest .= '&';
464: } else {
465: $dest .= '?'
466: }
467: $dest .= 'symb='.$env{'form.symb'};
468: }
469: if (($ferr) && ($tadv)) {
470: &error_page($r,$ferr,$dest);
471: } else {
472: $r->internal_redirect($dest);
473: }
474: return OK;
475: } else {
476: if (!$env{'request.course.id'}) {
477: &Apache::lonnet::appenv(
478: {"request.course.id" => $cdom.'_'.$cnum});
479: $furl='/adm/roles?tryagain=1';
480: $msg='<p><span class="LC_error">'
481: .&mt('Could not initialize [_1] at this time.',
482: $env{'course.'.$cdom.'_'.$cnum.'.description'})
483: .'</span></p>'
484: .'<p>'.&mt('Please try again.').'</p>'
485: .'<p>'.$ferr.'</p>';
486: }
487:
488: if (($ferr) && ($tadv)) {
489: &error_page($r,$ferr,$furl);
490: } else {
491: # Check to see if the user is a CC entering a course
492: # for the first time
493: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
494: if (substr($courseid, 0, 1) eq '/') {
495: $courseid = substr($courseid, 1);
496: }
497: $courseid =~ s/\//_/;
498: if (($cdom ne 'gcitest') && (($role eq 'cc') || ($role eq 'co'))
499: && ($env{'course.' . $courseid .'.course.helper.not.run'})) {
500: $furl = "/adm/helper/course.initialization.helper";
501: # Send the user to the course they selected
502: } elsif ($env{'request.course.id'}) {
503: if ($env{'form.destinationurl'}) {
504: my $dest = $env{'form.destinationurl'};
505: if ($env{'form.destsymb'} ne '') {
506: my $esc_symb = &HTML::Entities::encode($env{'form.destsymb'},'"<>&');
507: $dest .= '?symb='.$esc_symb;
508: }
509: &redirect_user($r,&mt('Entering [_1]',
510: $env{'course.'.$courseid.'.description'}),
511: $dest,$msg,
512: $env{'environment.remotenavmap'});
513: return OK;
514: }
515: if (&Apache::lonnet::allowed('whn',
516: $env{'request.course.id'})
517: || &Apache::lonnet::allowed('whn',
518: $env{'request.course.id'}.'/'
519: .$env{'request.course.sec'})
520: ) {
521: my $startpage = &courseloadpage($courseid);
522: unless (($startpage eq 'firstres') || ($cdom eq 'gcitest')) {
523: $msg = &mt('Entering [_1] ...',
524: $env{'course.'.$courseid.'.description'});
525: &redirect_user($r,&mt('New in course'),
526: '/adm/whatsnew?refpage=start',$msg,
527: $env{'environment.remotenavmap'});
528: return OK;
529: }
530: }
531: }
532: # Are we allowed to look at the first resource?
533: if ($furl !~ m|^/adm/|) {
534: # Guess not ...
535: $furl=&Apache::lonpageflip::first_accessible_resource();
536: }
537: if (($cdom eq 'gcitest') && ($custommenu)) {
538: $furl = '/adm/navmaps';
539: }
540: $msg = &mt('Entering [_1] ...',
541: $env{'course.'.$courseid.'.description'});
542: &redirect_user($r,&mt('Entering [_1]',
543: $env{'course.'.$courseid.'.description'}),
544: $furl,$msg,
545: $env{'environment.remotenavmap'});
546: }
547: return OK;
548: }
549: }
550: #
551: # Send the user to the construction space they selected
552: if ($role =~ /^(au|ca|aa)$/) {
553: my $redirect_url = '/priv/';
554: if ($role eq 'au') {
555: $redirect_url.=$env{'user.name'};
556: } else {
557: $where =~ /\/(.*)$/;
558: $redirect_url .= $1;
559: }
560: $redirect_url .= '/';
561: &redirect_user($r,&mt('Entering Construction Space'),
562: $redirect_url);
563: return OK;
564: }
565: if ($role eq 'dc') {
566: my $redirect_url = '/adm/menu/';
567: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
568: $redirect_url);
569: return OK;
570: }
571: if ($role eq 'sc') {
572: my $redirect_url = '/adm/grades?command=scantronupload';
573: &redirect_user($r,&mt('Loading Data Upload Page'),
574: $redirect_url);
575: return OK;
576: }
577: }
578: }
579: }
580: }
581:
582: # =============================================================== No Roles Init
583:
584: &Apache::loncommon::content_type($r,'text/html');
585: &Apache::loncommon::no_cache($r);
586: $r->send_http_header;
587: return OK if $r->header_only;
588:
589: my ($crumbtext,$pagetitle,$recent,$show_course);
590: my $noscript='<span class="LC_error">'.&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.').'<br />'.&mt('As this is not the case, most functionality in the system will be unavailable.').'</span><br />';
591: if ($custommenu) {
592: my $start_page = &Apache::loncommon::start_page('Main Menu',undef,
593: {'bread_crumbs' => 1});
594: $r->print(<<"ENDCUSTOM");
595: $start_page
596: <br />
597: <noscript>
598: $noscript
599: </noscript>
600: ENDCUSTOM
601: } else {
602: $crumbtext = 'User Roles';
603: $pagetitle = 'My Roles';
604: $recent = &mt('Recent Roles');
605: $show_course=&Apache::loncommon::show_course();
606: if ($show_course) {
607: $crumbtext = 'Courses';
608: $pagetitle = 'My Courses';
609: $recent = &mt('Recent Courses');
610: }
611: my $brcrum =[{href=>"/adm/roles",text=>$crumbtext}];
612: my $swinfo=&Apache::lonmenu::rawconfig();
613: my $start_page=&Apache::loncommon::start_page($pagetitle,undef,{bread_crumbs=>$brcrum});
614: my $standby=&mt('Role selected. Please stand by.');
615: $standby=~s/\n/\\n/g;
616: $r->print(<<ENDHEADER);
617: $start_page
618: <br />
619: <noscript>
620: $noscript
621: </noscript>
622: <script type="text/javascript">
623: // <![CDATA[
624: $swinfo
625: window.focus();
626:
627: active=true;
628:
629: function enterrole (thisform,rolecode,buttonname) {
630: if (active) {
631: active=false;
632: document.title='$standby';
633: window.status='$standby';
634: thisform.newrole.value=rolecode;
635: thisform.submit();
636: } else {
637: alert('$standby');
638: }
639: }
640: // ]]>
641: </script>
642: ENDHEADER
643: }
644:
645: # ------------------------------------------ Get Error Message from Environment
646:
647: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
648: if ($env{'user.error.msg'}) {
649: $r->log_reason(
650: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
651: }
652:
653: # ------------------------------------------------- Can this user re-init, etc?
654:
655: my $advanced=$env{'user.adv'};
656: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
657: my $tryagain=$env{'form.tryagain'};
658: my $reinit=$env{'user.reinit'};
659: delete $env{'user.reinit'};
660:
661: # -------------------------------------------------------- Generate Page Output
662: # --------------------------------------------------------------- Error Header?
663: if ($error) {
664: $r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
665: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
666: if ($priv ne '') {
667: $r->print(&mt('Access : ').&Apache::lonnet::plaintext($priv)."\n");
668: }
669: if ($fn ne '') {
670: $r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
671: }
672: if ($msg ne '') {
673: $r->print(&mt('Action : ').$msg."\n");
674: }
675: $r->print("</pre><hr />");
676: my $url=$fn;
677: my $last;
678: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
679: &GDBM_READER(),0640)) {
680: $last=$hash{'last_known'};
681: untie(%hash);
682: }
683: if ($last) { $fn.='?symb='.&escape($last); }
684:
685: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
686: &Apache::lonenc::check_encrypt($fn));
687: } else {
688: if ($env{'user.error.msg'}) {
689: if ($reinit) {
690: $r->print(
691: '<h3><span class="LC_error">'.
692: &mt('As your session file for the course or community has expired, you will need to re-select it.').'</span></h3>');
693: } else {
694: $r->print(
695: '<h3><span class="LC_error">'.
696: &mt('You need to choose another user role or enter a specific course or community for this function.').
697: '</span></h3>');
698: }
699: }
700: }
701: # -------------------------------------------------------- Choice or no choice?
702: if ($nochoose) {
703: $r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
704: &mt('This action is currently not authorized.').'</span>'.
705: &Apache::loncommon::end_page());
706: return OK;
707: } else {
708: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
709: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
710: }
711: unless ($custommenu) {
712: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
713: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
714: $r->print('<input type="hidden" name="selectrole" value="1" />');
715: $r->print('<input type="hidden" name="newrole" value="" />');
716: }
717: }
718:
719: my (%roletext,%sortrole,%roleclass,%futureroles,%timezones);
720: my ($countactive,$countfuture,$inrole,$possiblerole) =
721: &gather_roles($then,$refresh,$now,$reinit,$nochoose,\%roletext,\%sortrole,\%roleclass,
722: \%futureroles,\%timezones);
723:
724: $refresh = $now;
725: &Apache::lonnet::appenv({'user.refresh.time' => $refresh});
726: if ($custommenu) {
727: if ($env{'form.destinationurl'} eq '/adm/gci_info') {
728: $r->print(&gci_info_page()).
729: &Apache::loncommon::end_page();
730: return OK;
731: }
732: my %courses = &Apache::loncommon::existing_gcitest_courses('cc');
733: $env{'browser.interface'}='faketextual';
734: $env{'environment.remote'}='off';
735: my $numcourses = keys(%courses);
736: my $switcher;
737: if ($numcourses > 0) {
738: $switcher = &Apache::lonmainmenu::gcitest_switcher(%courses);
739: my $current;
740: if ($env{'request.course.id'}) {
741: $current = 'cc./'.$env{'course.'.$env{'request.course.id'}.'.domain'}.
742: '/'.$env{'course.'.$env{'request.course.id'}.'.num'};
743: }
744: my $switcher_js = &Apache::lonmainmenu::gcitest_switcher_js($current,$numcourses);
745: $r->print(<<"ENDSCRIPT");
746: <script type="text/javascript">
747: // <![CDATA[
748: $switcher_js
749: // ]]>
750: </script>
751: ENDSCRIPT
752: }
753: $r->print(&Apache::lonmenu::inlinemenu('gcicustom',$switcher).
754: &Apache::loncommon::end_page());
755: return OK;
756: } else {
757: if ($env{'form.destinationurl'} eq '/adm/gci_info') {
758: delete($env{'form.destinationurl'});
759: }
760: }
761: if ($env{'user.adv'}) {
762: $r->print('<p><label><input type="checkbox" name="showall"');
763: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
764: $r->print(' />'.&mt('Show all roles').'</label>'
765: .' <input type="submit" value="'.&mt('Update display').'" />'
766: .'</p>');
767: } else {
768: if ($countactive > 0) {
769: $r->print(&Apache::loncoursequeueadmin::queued_selfenrollment());
770: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
771: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
772: unless ($env{'user.domain'} eq 'gcitest') {
773: $r->print(
774: '<p>'
775: .&mt('[_1]Visit the [_2]Course/Community Catalog[_3]'
776: .' to view all [_4] LON-CAPA courses and communities.'
777: ,'<b>'
778: ,'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
779: ,'</a></b>',$domdesc)
780: .'<br />'
781: .&mt('If a course or community is [_1]not[_2] in your list of current courses and communities below,'
782: .' you may be able to enroll if self-enrollment is permitted.'
783: ,'<b>','</b>')
784: .'</p>'
785: );
786: }
787: }
788: }
789:
790: # No active roles
791: if ($countactive==0) {
792: if ($inrole) {
793: $r->print('<h2>'.&mt('Currently no additional roles, courses or communities').'</h2>');
794: } else {
795: $r->print('<h2>'.&mt('Currently no active roles, courses or communities').'</h2>');
796: }
797: unless ($env{'user.domain'} eq 'gcitest') {
798: &findcourse_advice($r);
799: &requestcourse_advice($r);
800: }
801: $r->print('</form>');
802: if ($countfuture) {
803: $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
804: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
805: $nochoose);
806: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
807: \%roletext);
808: my $tremark='';
809: my $tbg;
810: if ($env{'request.role'} eq 'cm') {
811: $tbg="LC_roles_selected";
812: $tremark=&mt('Currently selected.').' ';
813: } else {
814: $tbg="LC_roles_is";
815: }
816: $r->print(&Apache::loncommon::start_data_table_row()
817: .'<td class="'.$tbg.'"> </td>'
818: .'<td colspan="3">'
819: .&mt('No role specified')
820: .'</td>'
821: .'<td>'.$tremark.' </td>'
822: .&Apache::loncommon::end_data_table_row()
823: );
824:
825: $r->print(&Apache::loncommon::end_data_table());
826: }
827: $r->print(&Apache::loncommon::end_page());
828: return OK;
829: } elsif ($countactive==1) { # Is there only one choice?
830: my $needs_switchserver;
831: if ($env{'user.author'}) {
832: $needs_switchserver = &check_needs_switchserver($possiblerole);
833: }
834: if ((!$needs_switchserver) && ($env{'request.role'} eq 'cm')) {
835: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
836: '<input type="hidden" name="'.$possiblerole.'" value="1" />'.
837: '<noscript><br /><input type="submit" name="submit" value="'.&mt('Continue').'" /></noscript>');
838: $r->print("</form>\n");
839: $r->rflush();
840: $r->print('<script type="text/javascript">document.forms.rolechoice.submit();</script>');
841: $r->print(&Apache::loncommon::end_page());
842: return OK;
843: }
844: if ($needs_switchserver) {
845: $r->print("<h2>".&mt('Server Switch Required')."</h2>\n".
846: &mt('Construction Space access is only available from '.
847: 'the home server of the corresponding Author.').'<br />'.
848: &mt("Click the 'Switch Server' link to go there.").'<br />');
849: }
850: }
851: # ----------------------------------------------------------------------- Table
852: unless ((!&Apache::loncommon::show_course()) || ($nochoose) || ($countactive==1)) {
853: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
854: }
855: if ($env{'form.destinationurl'}) {
856: $r->print('<input type="hidden" name="destinationurl" value="'.
857: $env{'form.destinationurl'}.'" />');
858: if ($env{'form.destsymb'} ne '') {
859: $r->print('<input type="hidden" name="destsymb" value="'.
860: $env{'form.destsymb'}.'" />');
861: }
862: }
863: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
864: if ($env{'environment.recentroles'}) {
865: my %recent_roles =
866: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
867: my $output='';
868: foreach (sort(keys(%recent_roles))) {
869: if (ref($roletext{'user.role.'.$_}) eq 'ARRAY') {
870: $output.= &Apache::loncommon::start_data_table_row().
871: $roletext{'user.role.'.$_}->[0].
872: &Apache::loncommon::end_data_table_row().
873: &Apache::loncommon::continue_data_table_row().
874: $roletext{'user.role.'.$_}->[1].
875: &Apache::loncommon::end_data_table_row();
876: if ($_ =~ m-dc\./($match_domain)/-
877: && $dcroles{$1}) {
878: $output .= &adhoc_roles_row($1,'recent');
879: }
880: } elsif ($numdc > 0) {
881: unless ($_ =~/^error\:/) {
882: $output.=&display_cc_role('user.role.'.$_);
883: }
884: }
885: }
886: if ($output) {
887: $r->print(&Apache::loncommon::start_data_table_empty_row()
888: .'<td align="center" colspan="5">'
889: .$recent
890: .'</td>'
891: .&Apache::loncommon::end_data_table_empty_row()
892: );
893: $r->print($output);
894: $doheaders ++;
895: }
896: }
897:
898: if ($numdc > 0) {
899: $r->print(&coursepick_jscript());
900: $r->print(&Apache::loncommon::coursebrowser_javascript().
901: &Apache::loncommon::authorbrowser_javascript());
902: }
903: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
904: if ($countactive > 1) {
905: my $tremark='';
906: my $tbg;
907: if ($env{'request.role'} eq 'cm') {
908: $tbg="LC_roles_selected";
909: $tremark=&mt('Currently selected.').' ';
910: } else {
911: $tbg="LC_roles_is";
912: }
913: $r->print(&Apache::loncommon::start_data_table_row());
914: unless ($nochoose) {
915: if ($env{'request.role'} ne 'cm') {
916: $r->print('<td class="'.$tbg.'"><input type="submit" value="'.
917: &mt('Select').'" name="cm" /></td>');
918: } else {
919: $r->print('<td class="'.$tbg.'"> </td>');
920: }
921: }
922: $r->print('<td colspan="3">'
923: .&mt('No role specified')
924: .'</td>'
925: .'<td>'.$tremark.' </td>'
926: .&Apache::loncommon::end_data_table_row()
927: );
928: }
929: $r->print(&Apache::loncommon::end_data_table());
930: unless ($nochoose) {
931: $r->print("</form>\n");
932: }
933: # ------------------------------------------------------------ Privileges Info
934: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
935: $r->print('<hr /><h2>'.&mt('Current Privileges').'</h2>');
936: $r->print(&privileges_info());
937: }
938: $r->print(&Apache::lonnet::getannounce());
939: if ($advanced) {
940: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
941: $r->print('<p><small><i>'
942: .&mt('This LON-CAPA server is version [_1]',$r->dir_config('lonVersion'))
943: .'</i><br />'
944: .'<a href="/adm/logout">'.&mt('Logout').'</a> '
945: .'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
946: .&mt('Course/Community Catalog')
947: .'</a></small></p>');
948: }
949: $r->print(&Apache::loncommon::end_page());
950: return OK;
951: }
952:
953: sub gci_info_page {
954: return <<"END";
955: <h2>Welcome to the Geoscience Concept Inventory WebCenter</h2>
956: <p>
957: Use the tabs to navigate the WebCenter and...
958: <ul>
959: <li>Review and comment on existing GCI questions</li>
960: <li>Submit a GCI question of your own</li>
961: <li>Create an online test for your students</li>
962: </ul>
963: </p>
964: <p>For more information about writing and reviewing Concept Inventory questions
965: please refer to the <a href="/res/gci/gci/internal/pdfs/GCIWorkbook.pdf">GCI Workbook</a>.
966:
967: END
968: }
969:
970: sub gather_roles {
971: my ($then,$refresh,$now,$reinit,$nochoose,$roletext,$sortrole,$roleclass,$futureroles,$timezones) = @_;
972: my ($countactive,$countfuture,$inrole,$possiblerole) = (0,0,0,'');
973: my $advanced = $env{'user.adv'};
974: my $tryagain = $env{'form.tryagain'};
975: foreach my $envkey (sort(keys(%env))) {
976: my $button = 1;
977: my $switchserver='';
978: my ($role_text,$role_text_end,$sortkey);
979: if ($envkey=~/^user\.role\./) {
980: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
981: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
982: \$trolecode,\$tstatus,\$tstart,\$tend);
983: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
984: my $timezone = &role_timezone($where,$timezones);
985: $tremark='';
986: $tpstart=' ';
987: $tpend=' ';
988: if ($tstart) {
989: $tpstart=&Apache::lonlocal::locallocaltime($tstart,$timezone);
990: }
991: if ($tend) {
992: $tpend=&Apache::lonlocal::locallocaltime($tend,$timezone);
993: }
994: if ($env{'request.role'} eq $trolecode) {
995: $tstatus='selected';
996: }
997: my $tbg;
998: if (($tstatus eq 'is')
999: || ($tstatus eq 'selected')
1000: || ($tstatus eq 'future')
1001: || ($env{'form.showall'})) {
1002: if ($tstatus eq 'is') {
1003: $tbg='LC_roles_is';
1004: $possiblerole=$trolecode;
1005: $countactive++;
1006: } elsif ($tstatus eq 'future') {
1007: $tbg='LC_roles_future';
1008: $button=0;
1009: $futureroles->{$trolecode} = $tstart.':'.$tend;
1010: $countfuture ++;
1011: } elsif ($tstatus eq 'expired') {
1012: $tbg='LC_roles_expired';
1013: $button=0;
1014: } elsif ($tstatus eq 'will_not') {
1015: $tbg='LC_roles_will_not';
1016: $tremark.=&mt('Expired after logout.').' ';
1017: } elsif ($tstatus eq 'selected') {
1018: $tbg='LC_roles_selected';
1019: $inrole=1;
1020: $countactive++;
1021: $tremark.=&mt('Currently selected.').' ';
1022: }
1023: my $trole;
1024: if ($role =~ /^cr\//) {
1025: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
1026: if ($tremark) { $tremark.='<br />'; }
1027: $tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
1028: }
1029: $trole=Apache::lonnet::plaintext($role);
1030: my $ttype;
1031: my $twhere;
1032: my ($tdom,$trest,$tsection)=
1033: split(/\//,Apache::lonnet::declutter($where));
1034: # First, Co-Authorship roles
1035: if (($role eq 'ca') || ($role eq 'aa')) {
1036: my $home = &Apache::lonnet::homeserver($trest,$tdom);
1037: my $allowed=0;
1038: my @ids=&Apache::lonnet::current_machine_ids();
1039: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1040: if (!$allowed) {
1041: $button=0;
1042: $switchserver='otherserver='.$home.'&role='.$trolecode;
1043: }
1044: #next if ($home eq 'no_host');
1045: $home = &Apache::lonnet::hostname($home);
1046: $ttype='Construction Space';
1047: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
1048: ': '.$tdom.'<br />'.
1049: ' '.&mt('Server').': '.$home;
1050: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1051: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
1052: $sortkey=$role."$trest:$tdom";
1053: } elsif ($role eq 'au') {
1054: # Authors
1055: my $home = &Apache::lonnet::homeserver
1056: ($env{'user.name'},$env{'user.domain'});
1057: my $allowed=0;
1058: my @ids=&Apache::lonnet::current_machine_ids();
1059: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1060: if (!$allowed) {
1061: $button=0;
1062: $switchserver='otherserver='.$home.'&role='.$trolecode;
1063: }
1064: #next if ($home eq 'no_host');
1065: $home = &Apache::lonnet::hostname($home);
1066: $ttype='Construction Space';
1067: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
1068: ': '.$home;
1069: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1070: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
1071: $sortkey=$role;
1072: } elsif ($trest) {
1073: my $tcourseid=$tdom.'_'.$trest;
1074: $ttype = &Apache::loncommon::course_type($tcourseid);
1075: $trole = &Apache::lonnet::plaintext($role,$ttype);
1076: if ($env{'course.'.$tcourseid.'.description'}) {
1077: $twhere=$env{'course.'.$tcourseid.'.description'};
1078: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1079: unless ($twhere eq &mt('Currently not available')) {
1080: $twhere.=' <span class="LC_fontsize_small">'.
1081: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1082: '</span>';
1083: }
1084: } else {
1085: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1086: if (%newhash) {
1087: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
1088: "\0".$envkey;
1089: $twhere=$newhash{'description'}.
1090: ' <span class="LC_fontsize_small">'.
1091: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1092: '</span>';
1093: $ttype = $newhash{'type'};
1094: $trole = &Apache::lonnet::plaintext($role,$ttype);
1095: } else {
1096: $twhere=&mt('Currently not available');
1097: $env{'course.'.$tcourseid.'.description'}=$twhere;
1098: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1099: $ttype = 'Unavailable';
1100: }
1101: }
1102: if ($tsection) {
1103: $twhere.='<br />'.&mt('Section').': '.$tsection;
1104: }
1105: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
1106: } elsif ($tdom) {
1107: $ttype='Domain';
1108: $twhere=$tdom;
1109: $sortkey=$role.$twhere;
1110: } else {
1111: $ttype='System';
1112: $twhere=&mt('system wide');
1113: $sortkey=$role.$twhere;
1114: }
1115: ($role_text,$role_text_end) =
1116: &build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,
1117: $advanced,$tremark,$tbg,$trole,$twhere,$tpstart,
1118: $tpend,$nochoose,$button,$switchserver,$reinit);
1119: $roletext->{$envkey}=[$role_text,$role_text_end];
1120: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
1121: $sortrole->{$sortkey}=$envkey;
1122: $roleclass->{$envkey}=$ttype;
1123: }
1124: }
1125: }
1126: return ($countactive,$countfuture,$inrole,$possiblerole);
1127: }
1128:
1129: sub role_timezone {
1130: my ($where,$timezones) = @_;
1131: my $timezone;
1132: if (ref($timezones) eq 'HASH') {
1133: if ($where =~ m{^/($match_domain)/($match_courseid)}) {
1134: my $cdom = $1;
1135: my $cnum = $2;
1136: if ($cdom && $cnum) {
1137: if (!exists($timezones->{$cdom.'_'.$cnum})) {
1138: my %timehash =
1139: &Apache::lonnet::get('environment',['timezone'],$cdom,$cnum);
1140: if ($timehash{'timezone'} eq '') {
1141: if (!exists($timezones->{$cdom})) {
1142: my %domdefaults =
1143: &Apache::lonnet::get_domain_defaults($cdom);
1144: if ($domdefaults{'timezone_def'} eq '') {
1145: $timezones->{$cdom} = 'local';
1146: } else {
1147: $timezones->{$cdom} = $domdefaults{'timezone_def'};
1148: }
1149: }
1150: $timezones->{$cdom.'_'.$cnum} = $timezones->{$cdom};
1151: } else {
1152: $timezones->{$cdom.'_'.$cnum} =
1153: &Apache::lonlocal::gettimezone($timehash{'timezone'});
1154: }
1155: }
1156: $timezone = $timezones->{$cdom.'_'.$cnum};
1157: }
1158: } else {
1159: my ($tdom) = ($where =~ m{^/($match_domain)});
1160: if ($tdom) {
1161: if (!exists($timezones->{$tdom})) {
1162: my %domdefaults = &Apache::lonnet::get_domain_defaults($tdom);
1163: if ($domdefaults{'timezone_def'} eq '') {
1164: $timezones->{$tdom} = 'local';
1165: } else {
1166: $timezones->{$tdom} = $domdefaults{'timezone_def'};
1167: }
1168: }
1169: $timezone = $timezones->{$tdom};
1170: }
1171: }
1172: if ($timezone eq 'local') {
1173: $timezone = undef;
1174: }
1175: }
1176: return $timezone;
1177: }
1178:
1179: sub roletable_headers {
1180: my ($r,$roleclass,$sortrole,$nochoose) = @_;
1181: my $doheaders;
1182: if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
1183: $r->print('<br />'
1184: .&Apache::loncommon::start_data_table()
1185: .&Apache::loncommon::start_data_table_header_row()
1186: );
1187: if (!$nochoose) { $r->print('<th> </th>'); }
1188: $r->print('<th>'.&mt('User Role').'</th>'
1189: .'<th>'.&mt('Extent').'</th>'
1190: .'<th>'.&mt('Start').'</th>'
1191: .'<th>'.&mt('End').'</th>'
1192: .&Apache::loncommon::end_data_table_header_row()
1193: );
1194: $doheaders=-1;
1195: my @roletypes = &roletypes();
1196: foreach my $type (@roletypes) {
1197: my $haverole=0;
1198: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1199: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1200: $haverole=1;
1201: }
1202: }
1203: if ($haverole) { $doheaders++; }
1204: }
1205: }
1206: return $doheaders;
1207: }
1208:
1209: sub roletypes {
1210: my @types = ('Domain','Construction Space','Course','Community','Unavailable','System');
1211: return @types;
1212: }
1213:
1214: sub print_rolerows {
1215: my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
1216: if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
1217: my @types = &roletypes();
1218: foreach my $type (@types) {
1219: my $output;
1220: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1221: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1222: if (ref($roletext) eq 'HASH') {
1223: if (ref($roletext->{$sortrole->{$which}}) eq 'ARRAY') {
1224: $output.= &Apache::loncommon::start_data_table_row().
1225: $roletext->{$sortrole->{$which}}->[0].
1226: &Apache::loncommon::end_data_table_row().
1227: &Apache::loncommon::continue_data_table_row().
1228: $roletext->{$sortrole->{$which}}->[1].
1229: &Apache::loncommon::end_data_table_row();
1230: }
1231: if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
1232: if (ref($dcroles) eq 'HASH') {
1233: if ($dcroles->{$1}) {
1234: $output .= &adhoc_roles_row($1,'');
1235: }
1236: }
1237: }
1238: }
1239: }
1240: }
1241: if ($output) {
1242: if ($doheaders > 0) {
1243: $r->print(&Apache::loncommon::start_data_table_empty_row()
1244: .'<td align="center" colspan="5">'
1245: .&mt($type)
1246: .'</td>'
1247: .&Apache::loncommon::end_data_table_empty_row()
1248: );
1249: }
1250: $r->print($output);
1251: }
1252: }
1253: }
1254: }
1255:
1256: sub findcourse_advice {
1257: my ($r) = @_;
1258: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1259: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1260: if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
1261: $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
1262: <ul>
1263: <li>'.&mt('The course has yet to be created.').'</li>
1264: <li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
1265: <li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
1266: <li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
1267: <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>
1268: </ul>');
1269: } else {
1270: $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 />');
1271: }
1272: $r->print('<h3>'.&mt('Self-Enrollment').'</h3>'.
1273: '<p>'.&mt('The [_1]Course/Community Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created, as well as any communities in the domain.','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a>',$domdesc).'<br />');
1274: $r->print(&mt('You can search for courses and communities which permit self-enrollment, if you would like to enroll in one.').'</p>'.
1275: &Apache::loncoursequeueadmin::queued_selfenrollment());
1276: return;
1277: }
1278:
1279: sub requestcourse_advice {
1280: my ($r) = @_;
1281: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1282: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1283: my (%can_request,%request_doms);
1284: &Apache::lonnet::check_can_request($env{'user.domain'},\%can_request,\%request_doms);
1285: if (keys(%request_doms) > 0) {
1286: my ($types,$typename) = &Apache::loncommon::course_types();
1287: if ((ref($types) eq 'ARRAY') && (ref($typename) eq 'HASH')) {
1288: $r->print('<h3>'.&mt('Request creation of a course or community').'</h3>'.
1289: '<p>'.&mt('You have rights to request the creation of courses and/or communities in the following domain(s):').'<ul>');
1290: my (@reqdoms,@reqtypes);
1291: foreach my $type (sort(keys(%request_doms))) {
1292: push(@reqtypes,$type);
1293: if (ref($request_doms{$type}) eq 'ARRAY') {
1294: my $domstr = join(', ',map { &Apache::lonnet::domain($_) } sort(@{$request_doms{$type}}));
1295: $r->print(
1296: '<li>'
1297: .&mt('[_1]'.$typename->{$type}.'[_2] in domain: [_3]',
1298: '<i>',
1299: '</i>',
1300: '<b>'.$domstr.'</b>')
1301: .'</li>'
1302: );
1303: foreach my $dom (@{$request_doms{$type}}) {
1304: unless (grep(/^\Q$dom\E/,@reqdoms)) {
1305: push(@reqdoms,$dom);
1306: }
1307: }
1308: }
1309: }
1310: my @showtypes;
1311: foreach my $type (@{$types}) {
1312: if (grep(/^\Q$type\E$/,@reqtypes)) {
1313: push(@showtypes,$type);
1314: }
1315: }
1316: my $requrl = '/adm/requestcourse';
1317: if (@reqdoms == 1) {
1318: $requrl .= '?showdom='.$reqdoms[0];
1319: }
1320: if (@showtypes > 0) {
1321: $requrl.=(($requrl=~/\?/)?'&':'?').'crstype='.$showtypes[0];
1322: }
1323: if (@reqdoms == 1 || @showtypes > 0) {
1324: $requrl .= '&state=crstype&action=new';
1325: }
1326: $r->print('</ul>'.&mt('Use the [_1]request form[_2] to submit a request for creation of a new course or community.','<a href="'.$requrl.'">','</a>').'</p>');
1327: }
1328: }
1329: return;
1330: }
1331:
1332: sub queued_selfenrollment {
1333: my ($r) = @_;
1334: my %selfenrollrequests = &Apache::lonnet::dump('selfenrollrequests');
1335: my %reqs_by_date;
1336: foreach my $item (keys(%selfenrollrequests)) {
1337: if (ref($selfenrollrequests{$item}) eq 'HASH') {
1338: if ($selfenrollrequests{$item}{'status'} eq 'request') {
1339: if ($selfenrollrequests{$item}{'timestamp'}) {
1340: push(@{$reqs_by_date{$selfenrollrequests{$item}{'timestamp'}}},$item);
1341: }
1342: }
1343: }
1344: }
1345: if (keys(%reqs_by_date)) {
1346: my $rolename = &Apache::lonnet::plaintext('st');
1347: $r->print('<b>'.&mt('Enrollment requests pending Course Coordinator approval').'</b><br />'.
1348: &Apache::loncommon::start_data_table().
1349: &Apache::loncommon::start_data_table_header_row().
1350: '<th>'.&mt('Date requested').'</th><th>'.&mt('Course title').'</th>'.
1351: '<th>'.&mt('User role').'</th><th>'.&mt('Section').'</th>'.
1352: &Apache::loncommon::end_data_table_header_row());
1353: my @sorted = sort { $a <=> $b } (keys(%reqs_by_date));
1354: foreach my $item (@sorted) {
1355: if (ref($reqs_by_date{$item}) eq 'ARRAY') {
1356: foreach my $crs (@{$reqs_by_date{$item}}) {
1357: my %courseinfo = &Apache::lonnet::coursedescription($crs);
1358: my $usec = $selfenrollrequests{$crs}{'section'};
1359: if ($usec eq '') {
1360: $usec = &mt('No section');
1361: }
1362: $r->print(&Apache::loncommon::start_data_table_row().
1363: '<td>'.&Apache::lonlocal::locallocaltime($item).'</td>'.
1364: '<td>'.$courseinfo{'description'}.'</td>'.
1365: '<td>'.$rolename.'</td><td>'.$usec.'</td>'.
1366: &Apache::loncommon::end_data_table_row());
1367: }
1368: }
1369: }
1370: $r->print(&Apache::loncommon::end_data_table());
1371: }
1372: return;
1373: }
1374:
1375: sub privileges_info {
1376: my ($which) = @_;
1377: my $output;
1378:
1379: $which ||= $env{'request.role'};
1380:
1381: foreach my $envkey (sort(keys(%env))) {
1382: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
1383:
1384: my $where=$1;
1385: my $ttype;
1386: my $twhere;
1387: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
1388: if ($trest) {
1389: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
1390: $ttype='Construction Space';
1391: $twhere='User: '.$trest.', Domain: '.$tdom;
1392: } else {
1393: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
1394: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
1395: if ($tsec) {
1396: my $sec_type = 'Section';
1397: if (exists($env{"user.role.gr.$where"})) {
1398: $sec_type = 'Group';
1399: }
1400: $twhere.=' ('.$sec_type.': '.$tsec.')';
1401: }
1402: }
1403: } elsif ($tdom) {
1404: $ttype='Domain';
1405: $twhere=$tdom;
1406: } else {
1407: $ttype='System';
1408: $twhere='/';
1409: }
1410: $output .= "\n<h3>".&mt($ttype).': '.$twhere.'</h3>'."\n<ul>";
1411: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
1412: next if (!$priv);
1413:
1414: my ($prv,$restr)=split(/\&/,$priv);
1415: my $trestr='';
1416: if ($restr ne 'F') {
1417: $trestr.=' ('.
1418: join(', ',
1419: map { &Apache::lonnet::plaintext($_) }
1420: (split('',$restr))).') ';
1421: }
1422: $output .= "\n\t".
1423: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
1424: }
1425: $output .= "\n".'</ul>';
1426: }
1427: return $output;
1428: }
1429:
1430: sub build_roletext {
1431: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit) = @_;
1432: my ($roletext,$roletext_end);
1433: my $is_dc=($trolecode =~ m/^dc\./);
1434: my $rowspan=($is_dc) ? ''
1435: : ' rowspan="2" ';
1436:
1437: unless ($nochoose) {
1438: my $buttonname=$trolecode;
1439: $buttonname=~s/\W//g;
1440: if (!$button) {
1441: if ($switchserver) {
1442: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'
1443: .'<a href="/adm/switchserver?'.$switchserver.'">'
1444: .&mt('Switch Server')
1445: .'</a></td>';
1446: } else {
1447: $roletext.=('<td'.$rowspan.' class="'.$tbg.'"> </td>');
1448: }
1449: } elsif ($tstatus eq 'is') {
1450: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'.
1451: '<input name="'.$buttonname.'" type="button" value="'.
1452: &mt('Select').'" onclick="javascript:enterrole(this.form,\''.
1453: $trolecode."','".$buttonname.'\');" /></td>';
1454: } elsif ($tryagain) {
1455: $roletext.=
1456: '<td'.$rowspan.' class="'.$tbg.'">'.
1457: '<input name="'.$buttonname.'" type="button" value="'.
1458: &mt('Try Selecting Again').'" onclick="javascript:enterrole(this.form,\''.
1459: $trolecode."','".$buttonname.'\');" /></td>';
1460: } elsif ($advanced) {
1461: $roletext.=
1462: '<td'.$rowspan.' class="'.$tbg.'">'.
1463: '<input name="'.$buttonname.'" type="button" value="'.
1464: &mt('Re-Initialize').'" onclick="javascript:enterrole(this.form,\''.
1465: $trolecode."','".$buttonname.'\');" /></td>';
1466: } elsif ($reinit) {
1467: $roletext.=
1468: '<td'.$rowspan.' class="'.$tbg.'">'.
1469: '<input name="'.$buttonname.'" type="button" value="'.
1470: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1471: $trolecode."','".$buttonname.'\');" /></td>';
1472: } else {
1473: $roletext.=
1474: '<td'.$rowspan.' class="'.$tbg.'">'.
1475: '<input name="'.$buttonname.'" type="button" value="'.
1476: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1477: $trolecode."','".$buttonname.'\');" /></td>';
1478: }
1479: }
1480: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
1481: $tremark.=&Apache::lonannounce::showday(time,1,
1482: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
1483: }
1484: $roletext.='<td>'.$trole.'</td>'
1485: .'<td>'.$twhere.'</td>'
1486: .'<td>'.$tpstart.'</td>'
1487: .'<td>'.$tpend.'</td>';
1488: if (!$is_dc) {
1489: $roletext_end = '<td colspan="4">'.
1490: $tremark.' '.
1491: '</td>';
1492: }
1493: return ($roletext,$roletext_end);
1494: }
1495:
1496: sub check_needs_switchserver {
1497: my ($possiblerole) = @_;
1498: my $needs_switchserver;
1499: my ($role,$where) = split(/\./,$possiblerole,2);
1500: my (undef,$tdom,$twho) = split(/\//,$where);
1501: my ($server_status,$home);
1502: if (($role eq 'ca') || ($role eq 'aa')) {
1503: ($server_status,$home) = &check_author_homeserver($twho,$tdom);
1504: } else {
1505: ($server_status,$home) = &check_author_homeserver($env{'user.name'},
1506: $env{'user.domain'});
1507: }
1508: if ($server_status eq 'switchserver') {
1509: $needs_switchserver = 1;
1510: }
1511: return $needs_switchserver;
1512: }
1513:
1514: sub check_author_homeserver {
1515: my ($uname,$udom)=@_;
1516: if (($uname eq '') || ($udom eq '')) {
1517: return ('fail','');
1518: }
1519: my $home = &Apache::lonnet::homeserver($uname,$udom);
1520: if (&Apache::lonnet::host_domain($home) ne $udom) {
1521: return ('fail',$home);
1522: }
1523: my @ids=&Apache::lonnet::current_machine_ids();
1524: if (grep(/^\Q$home\E$/,@ids)) {
1525: return ('ok',$home);
1526: } else {
1527: return ('switchserver',$home);
1528: }
1529: }
1530:
1531: sub check_fordc {
1532: my ($dcroles,$then) = @_;
1533: my $numdc = 0;
1534: if ($env{'user.adv'}) {
1535: foreach my $envkey (sort keys %env) {
1536: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
1537: my $dcdom = $1;
1538: my $livedc = 1;
1539: my ($tstart,$tend)=split(/\./,$env{$envkey});
1540: if ($tstart && $tstart>$then) { $livedc = 0; }
1541: if ($tend && $tend <$then) { $livedc = 0; }
1542: if ($livedc) {
1543: $$dcroles{$dcdom} = $envkey;
1544: $numdc++;
1545: }
1546: }
1547: }
1548: }
1549: return $numdc;
1550: }
1551:
1552: sub adhoc_course_role {
1553: my ($refresh,$then) = @_;
1554: my ($cdom,$cnum,$crstype);
1555: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1556: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1557: $crstype = &Apache::loncommon::course_type();
1558: if (&check_forcc($cdom,$cnum,$refresh,$then,$crstype)) {
1559: my $setprivs;
1560: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
1561: $setprivs = 1;
1562: } else {
1563: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
1564: if (($start && ($start>$refresh || $start == -1)) ||
1565: ($end && $end<$then)) {
1566: $setprivs = 1;
1567: }
1568: }
1569: if ($setprivs) {
1570: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
1571: my $role = $1;
1572: my $custom_role = $2;
1573: my $usec = $3;
1574: if ($role eq 'cr') {
1575: if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
1576: $role .= $custom_role;
1577: } else {
1578: return;
1579: }
1580: }
1581: my (%userroles,%newrole,%newgroups,%group_privs);
1582: my %cgroups =
1583: &Apache::lonnet::get_active_groups($env{'user.domain'},
1584: $env{'user.name'},$cdom,$cnum);
1585: foreach my $group (keys(%cgroups)) {
1586: $group_privs{$group} =
1587: $env{'user.priv.cc./'.$cdom.'/'.$cnum.'./'.$cdom.'/'.$cnum.'/'.$group};
1588: }
1589: $newgroups{'/'.$cdom.'/'.$cnum} = \%group_privs;
1590: my $area = '/'.$cdom.'/'.$cnum;
1591: my $spec = $role.'.'.$area;
1592: if ($usec ne '') {
1593: $spec .= '/'.$usec;
1594: $area .= '/'.$usec;
1595: }
1596: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1597: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,\%newgroups);
1598: my $adhocstart = $refresh-1;
1599: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1600: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1601: }
1602: }
1603: }
1604: return;
1605: }
1606:
1607: sub check_forcc {
1608: my ($cdom,$cnum,$refresh,$then,$crstype) = @_;
1609: my ($is_cc,$ccrole);
1610: if ($crstype eq 'Community') {
1611: $ccrole = 'co';
1612: } else {
1613: $ccrole = 'cc';
1614: }
1615: if ($cdom ne '' && $cnum ne '') {
1616: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1617: my $envkey = 'user.role.'.$ccrole.'./'.$cdom.'/'.$cnum;
1618: if (defined($env{$envkey})) {
1619: $is_cc = 1;
1620: my ($tstart,$tend)=split(/\./,$env{$envkey});
1621: if ($tstart && $tstart>$refresh) { $is_cc = 0; }
1622: if ($tend && $tend <$then) { $is_cc = 0; }
1623: }
1624: }
1625: }
1626: return $is_cc;
1627: }
1628:
1629: sub courselink {
1630: my ($dcdom,$rowtype) = @_;
1631: my $courseform=&Apache::loncommon::selectcourse_link
1632: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1633: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1634: $dcdom,$dcdom,undef,'Course/Community');
1635: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1636: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1637: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1638: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1639: return $courseform.$hiddenitems;
1640: }
1641:
1642: sub coursepick_jscript {
1643: my %lt = &Apache::lonlocal::texthash(
1644: 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.",
1645: youc => 'You can only use this screen to select courses and communities in the current domain.',
1646: );
1647: my $verify_script = <<"END";
1648: <script type="text/javascript">
1649: // <![CDATA[
1650: function verifyCoursePick(caller) {
1651: var numbutton = getIndex(caller)
1652: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1653: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1654: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1655: if (pickedCourse != '') {
1656: if (numbutton != -1) {
1657: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1658: document.rolechoice.elements[numbutton+1].name = courseTarget
1659: document.rolechoice.submit()
1660: }
1661: }
1662: else {
1663: alert("$lt{'plsu'}");
1664: }
1665: }
1666: else {
1667: alert("$lt{'youc'}")
1668: }
1669: }
1670: function getIndex(caller) {
1671: for (var i=0;i<document.rolechoice.elements.length;i++) {
1672: if (document.rolechoice.elements[i] == caller) {
1673: return i;
1674: }
1675: }
1676: return -1;
1677: }
1678: // ]]>
1679: </script>
1680: END
1681: return $verify_script;
1682: }
1683:
1684: sub coauthorlink {
1685: my ($dcdom,$rowtype) = @_;
1686: my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
1687: my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
1688: return $coauthorform.$hiddenitems;
1689: }
1690:
1691: sub display_cc_role {
1692: my $rolekey = shift;
1693: my ($roletext,$roletext_end);
1694: my $advanced = $env{'user.adv'};
1695: my $tryagain = $env{'form.tryagain'};
1696: unless ($rolekey =~/^error\:/) {
1697: if ($rolekey =~ m{^user\.role\.(cc|co)\./($match_domain)/($match_courseid)$}) {
1698: my $ccrole = $1;
1699: my $tcourseid = $2.'_'.$3;
1700: my $trolecode = $1.'./'.$2.'/'.$3;
1701: my $twhere;
1702: my $ttype;
1703: my $tbg='LC_roles_is';
1704: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1705: if (%newhash) {
1706: $twhere=$newhash{'description'}.
1707: ' <span style="LC_fontsize_small">'.
1708: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1).
1709: '</span>';
1710: $ttype = $newhash{'type'};
1711: } else {
1712: $twhere=&mt('Currently not available');
1713: $env{'course.'.$tcourseid.'.description'}=$twhere;
1714: }
1715: my $trole = &Apache::lonnet::plaintext($ccrole,$ttype);
1716: $twhere.="<br />".&mt('Domain').":".$1;
1717: ($roletext,$roletext_end) = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$trole,$twhere,'','','',1,'');
1718: }
1719: }
1720: return ($roletext,$roletext_end);
1721: }
1722:
1723: sub adhoc_roles_row {
1724: my ($dcdom,$rowtype) = @_;
1725: my $output = &Apache::loncommon::continue_data_table_row()
1726: .' <td colspan="5">'
1727: .&mt('[_1]Ad hoc[_2] roles in domain [_3] --'
1728: ,'<span class="LC_cusr_emph">','</span>',$dcdom)
1729: .' ';
1730: my $selectcclink = &courselink($dcdom,$rowtype);
1731: my $ccrole = &Apache::lonnet::plaintext('co',undef,undef,1);
1732: my $carole = &Apache::lonnet::plaintext('ca');
1733: my $selectcalink = &coauthorlink($dcdom,$rowtype);
1734: $output.=$ccrole.': '.$selectcclink
1735: .' | '.$carole.': '.$selectcalink
1736: .&Apache::loncommon::end_data_table_row();
1737: return $output;
1738: }
1739:
1740: sub recent_filename {
1741: my $area=shift;
1742: return 'nohist_recent_'.&escape($area);
1743: }
1744:
1745: sub courseloadpage {
1746: my ($courseid) = @_;
1747: my $startpage;
1748: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1749: [$courseid.':courseinit']);
1750: my ($tmp) = %entry_settings;
1751: unless ($tmp =~ /^error: 2 /) {
1752: $startpage = $entry_settings{$courseid.':courseinit'};
1753: }
1754: if ($startpage eq '') {
1755: if (exists($env{'environment.course_init_display'})) {
1756: $startpage = $env{'environment.course_init_display'};
1757: }
1758: }
1759: return $startpage;
1760: }
1761:
1762: 1;
1763: __END__
1764:
1765: =head1 NAME
1766:
1767: Apache::lonroles - User Roles Screen
1768:
1769: =head1 SYNOPSIS
1770:
1771: Invoked by /etc/httpd/conf/srm.conf:
1772:
1773: <Location /adm/roles>
1774: PerlAccessHandler Apache::lonacc
1775: SetHandler perl-script
1776: PerlHandler Apache::lonroles
1777: ErrorDocument 403 /adm/login
1778: ErrorDocument 500 /adm/errorhandler
1779: </Location>
1780:
1781: =head1 OVERVIEW
1782:
1783: =head2 Choosing Roles
1784:
1785: C<lonroles> is a handler that allows a user to switch roles in
1786: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1787: default role that a user has before selecting a role, as widely as
1788: possible, but certain handlers for example need specification which
1789: course they should act on, etc. Both in this scenario, and when the
1790: handler determines via C<lonnet>'s C<&allowed> function that a certain
1791: action is not allowed, C<lonroles> is used as error handler. This
1792: allows the user to select another role which may have permission to do
1793: what they were trying to do. C<lonroles> can also be accessed via the
1794: B<CRS> button in the Remote Control.
1795:
1796: =begin latex
1797:
1798: \begin{figure}
1799: \begin{center}
1800: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1801: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1802: \end{center}
1803: \end{figure}
1804:
1805: =end latex
1806:
1807: =head2 Role Initialization
1808:
1809: 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.
1810:
1811: =head1 INTRODUCTION
1812:
1813: This module enables a user to select what role he wishes to
1814: operate under (instructor, student, teaching assistant, course
1815: coordinator, etc). These roles are pre-established by the actions
1816: of upper-level users.
1817:
1818: This is part of the LearningOnline Network with CAPA project
1819: described at http://www.lon-capa.org.
1820:
1821: =head1 HANDLER SUBROUTINE
1822:
1823: This routine is called by Apache and mod_perl.
1824:
1825: =over 4
1826:
1827: =item *
1828:
1829: Roles Initialization (yes/no)
1830:
1831: =item *
1832:
1833: Get Error Message from Environment
1834:
1835: =item *
1836:
1837: Who is this?
1838:
1839: =item *
1840:
1841: Generate Page Output
1842:
1843: =item *
1844:
1845: Choice or no choice
1846:
1847: =item *
1848:
1849: Table
1850:
1851: =item *
1852:
1853: Privileges
1854:
1855: =back
1856:
1857: =cut
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