1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.240.2.6 2009/12/25 00:26:16 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: $r->print(
772: '<p>'
773: .&mt('[_1]Visit the [_2]Course/Community Catalog[_3]'
774: .' to view all [_4] LON-CAPA courses and communities.'
775: ,'<b>'
776: ,'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
777: ,'</a></b>',$domdesc)
778: .'<br />'
779: .&mt('If a course or community is [_1]not[_2] in your list of current courses and communities below,'
780: .' you may be able to enroll if self-enrollment is permitted.'
781: ,'<b>','</b>')
782: .'</p>'
783: );
784: }
785: }
786:
787: # No active roles
788: if ($countactive==0) {
789: if ($inrole) {
790: $r->print('<h2>'.&mt('Currently no additional roles, courses or communities').'</h2>');
791: } else {
792: $r->print('<h2>'.&mt('Currently no active roles, courses or communities').'</h2>');
793: }
794: &findcourse_advice($r);
795: &requestcourse_advice($r);
796: $r->print('</form>');
797: if ($countfuture) {
798: $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
799: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
800: $nochoose);
801: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
802: \%roletext);
803: my $tremark='';
804: my $tbg;
805: if ($env{'request.role'} eq 'cm') {
806: $tbg="LC_roles_selected";
807: $tremark=&mt('Currently selected.').' ';
808: } else {
809: $tbg="LC_roles_is";
810: }
811: $r->print(&Apache::loncommon::start_data_table_row()
812: .'<td class="'.$tbg.'"> </td>'
813: .'<td colspan="3">'
814: .&mt('No role specified')
815: .'</td>'
816: .'<td>'.$tremark.' </td>'
817: .&Apache::loncommon::end_data_table_row()
818: );
819:
820: $r->print(&Apache::loncommon::end_data_table());
821: }
822: $r->print(&Apache::loncommon::end_page());
823: return OK;
824: } elsif ($countactive==1) { # Is there only one choice?
825: my $needs_switchserver;
826: if ($env{'user.author'}) {
827: $needs_switchserver = &check_needs_switchserver($possiblerole);
828: }
829: if ((!$needs_switchserver) && ($env{'request.role'} eq 'cm')) {
830: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
831: '<input type="hidden" name="'.$possiblerole.'" value="1" />'.
832: '<noscript><br /><input type="submit" name="submit" value="'.&mt('Continue').'" /></noscript>');
833: $r->print("</form>\n");
834: $r->rflush();
835: $r->print('<script type="text/javascript">document.forms.rolechoice.submit();</script>');
836: $r->print(&Apache::loncommon::end_page());
837: return OK;
838: }
839: if ($needs_switchserver) {
840: $r->print("<h2>".&mt('Server Switch Required')."</h2>\n".
841: &mt('Construction Space access is only available from '.
842: 'the home server of the corresponding Author.').'<br />'.
843: &mt("Click the 'Switch Server' link to go there.").'<br />');
844: }
845: }
846: # ----------------------------------------------------------------------- Table
847: unless ((!&Apache::loncommon::show_course()) || ($nochoose) || ($countactive==1)) {
848: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
849: }
850: if ($env{'form.destinationurl'}) {
851: $r->print('<input type="hidden" name="destinationurl" value="'.
852: $env{'form.destinationurl'}.'" />');
853: if ($env{'form.destsymb'} ne '') {
854: $r->print('<input type="hidden" name="destsymb" value="'.
855: $env{'form.destsymb'}.'" />');
856: }
857: }
858: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
859: if ($env{'environment.recentroles'}) {
860: my %recent_roles =
861: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
862: my $output='';
863: foreach (sort(keys(%recent_roles))) {
864: if (ref($roletext{'user.role.'.$_}) eq 'ARRAY') {
865: $output.= &Apache::loncommon::start_data_table_row().
866: $roletext{'user.role.'.$_}->[0].
867: &Apache::loncommon::end_data_table_row().
868: &Apache::loncommon::continue_data_table_row().
869: $roletext{'user.role.'.$_}->[1].
870: &Apache::loncommon::end_data_table_row();
871: if ($_ =~ m-dc\./($match_domain)/-
872: && $dcroles{$1}) {
873: $output .= &adhoc_roles_row($1,'recent');
874: }
875: } elsif ($numdc > 0) {
876: unless ($_ =~/^error\:/) {
877: $output.=&display_cc_role('user.role.'.$_);
878: }
879: }
880: }
881: if ($output) {
882: $r->print(&Apache::loncommon::start_data_table_empty_row()
883: .'<td align="center" colspan="5">'
884: .$recent
885: .'</td>'
886: .&Apache::loncommon::end_data_table_empty_row()
887: );
888: $r->print($output);
889: $doheaders ++;
890: }
891: }
892:
893: if ($numdc > 0) {
894: $r->print(&coursepick_jscript());
895: $r->print(&Apache::loncommon::coursebrowser_javascript().
896: &Apache::loncommon::authorbrowser_javascript());
897: }
898: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
899: if ($countactive > 1) {
900: my $tremark='';
901: my $tbg;
902: if ($env{'request.role'} eq 'cm') {
903: $tbg="LC_roles_selected";
904: $tremark=&mt('Currently selected.').' ';
905: } else {
906: $tbg="LC_roles_is";
907: }
908: $r->print(&Apache::loncommon::start_data_table_row());
909: unless ($nochoose) {
910: if ($env{'request.role'} ne 'cm') {
911: $r->print('<td class="'.$tbg.'"><input type="submit" value="'.
912: &mt('Select').'" name="cm" /></td>');
913: } else {
914: $r->print('<td class="'.$tbg.'"> </td>');
915: }
916: }
917: $r->print('<td colspan="3">'
918: .&mt('No role specified')
919: .'</td>'
920: .'<td>'.$tremark.' </td>'
921: .&Apache::loncommon::end_data_table_row()
922: );
923: }
924: $r->print(&Apache::loncommon::end_data_table());
925: unless ($nochoose) {
926: $r->print("</form>\n");
927: }
928: # ------------------------------------------------------------ Privileges Info
929: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
930: $r->print('<hr /><h2>'.&mt('Current Privileges').'</h2>');
931: $r->print(&privileges_info());
932: }
933: $r->print(&Apache::lonnet::getannounce());
934: if ($advanced) {
935: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
936: $r->print('<p><small><i>'
937: .&mt('This LON-CAPA server is version [_1]',$r->dir_config('lonVersion'))
938: .'</i><br />'
939: .'<a href="/adm/logout">'.&mt('Logout').'</a> '
940: .'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
941: .&mt('Course/Community Catalog')
942: .'</a></small></p>');
943: }
944: $r->print(&Apache::loncommon::end_page());
945: return OK;
946: }
947:
948: sub gci_info_page {
949: return <<"END";
950: <h2>Welcome to the Geoscience Concept Inventory WebCenter</h2>
951: <p>
952: Use the tabs to navigate the WebCenter and...
953: <ul>
954: <li>Review and comment on existing GCI questions</li>
955: <li>Submit a GCI question of your own</li>
956: <li>Create an online test for your students</li>
957: </ul>
958: </p>
959: <p>For more information about writing and reviewing Concept Inventory questions
960: please refer to the <a href="/res/gci/gci/internal/pdfs/GCIWorkbook.pdf">GCI Workbook</a>.
961:
962: END
963: }
964:
965: sub gather_roles {
966: my ($then,$refresh,$now,$reinit,$nochoose,$roletext,$sortrole,$roleclass,$futureroles,$timezones) = @_;
967: my ($countactive,$countfuture,$inrole,$possiblerole) = (0,0,0,'');
968: my $advanced = $env{'user.adv'};
969: my $tryagain = $env{'form.tryagain'};
970: foreach my $envkey (sort(keys(%env))) {
971: my $button = 1;
972: my $switchserver='';
973: my ($role_text,$role_text_end,$sortkey);
974: if ($envkey=~/^user\.role\./) {
975: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
976: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
977: \$trolecode,\$tstatus,\$tstart,\$tend);
978: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
979: my $timezone = &role_timezone($where,$timezones);
980: $tremark='';
981: $tpstart=' ';
982: $tpend=' ';
983: if ($tstart) {
984: $tpstart=&Apache::lonlocal::locallocaltime($tstart,$timezone);
985: }
986: if ($tend) {
987: $tpend=&Apache::lonlocal::locallocaltime($tend,$timezone);
988: }
989: if ($env{'request.role'} eq $trolecode) {
990: $tstatus='selected';
991: }
992: my $tbg;
993: if (($tstatus eq 'is')
994: || ($tstatus eq 'selected')
995: || ($tstatus eq 'future')
996: || ($env{'form.showall'})) {
997: if ($tstatus eq 'is') {
998: $tbg='LC_roles_is';
999: $possiblerole=$trolecode;
1000: $countactive++;
1001: } elsif ($tstatus eq 'future') {
1002: $tbg='LC_roles_future';
1003: $button=0;
1004: $futureroles->{$trolecode} = $tstart.':'.$tend;
1005: $countfuture ++;
1006: } elsif ($tstatus eq 'expired') {
1007: $tbg='LC_roles_expired';
1008: $button=0;
1009: } elsif ($tstatus eq 'will_not') {
1010: $tbg='LC_roles_will_not';
1011: $tremark.=&mt('Expired after logout.').' ';
1012: } elsif ($tstatus eq 'selected') {
1013: $tbg='LC_roles_selected';
1014: $inrole=1;
1015: $countactive++;
1016: $tremark.=&mt('Currently selected.').' ';
1017: }
1018: my $trole;
1019: if ($role =~ /^cr\//) {
1020: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
1021: if ($tremark) { $tremark.='<br />'; }
1022: $tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
1023: }
1024: $trole=Apache::lonnet::plaintext($role);
1025: my $ttype;
1026: my $twhere;
1027: my ($tdom,$trest,$tsection)=
1028: split(/\//,Apache::lonnet::declutter($where));
1029: # First, Co-Authorship roles
1030: if (($role eq 'ca') || ($role eq 'aa')) {
1031: my $home = &Apache::lonnet::homeserver($trest,$tdom);
1032: my $allowed=0;
1033: my @ids=&Apache::lonnet::current_machine_ids();
1034: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1035: if (!$allowed) {
1036: $button=0;
1037: $switchserver='otherserver='.$home.'&role='.$trolecode;
1038: }
1039: #next if ($home eq 'no_host');
1040: $home = &Apache::lonnet::hostname($home);
1041: $ttype='Construction Space';
1042: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
1043: ': '.$tdom.'<br />'.
1044: ' '.&mt('Server').': '.$home;
1045: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1046: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
1047: $sortkey=$role."$trest:$tdom";
1048: } elsif ($role eq 'au') {
1049: # Authors
1050: my $home = &Apache::lonnet::homeserver
1051: ($env{'user.name'},$env{'user.domain'});
1052: my $allowed=0;
1053: my @ids=&Apache::lonnet::current_machine_ids();
1054: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1055: if (!$allowed) {
1056: $button=0;
1057: $switchserver='otherserver='.$home.'&role='.$trolecode;
1058: }
1059: #next if ($home eq 'no_host');
1060: $home = &Apache::lonnet::hostname($home);
1061: $ttype='Construction Space';
1062: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
1063: ': '.$home;
1064: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1065: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
1066: $sortkey=$role;
1067: } elsif ($trest) {
1068: my $tcourseid=$tdom.'_'.$trest;
1069: $ttype = &Apache::loncommon::course_type($tcourseid);
1070: $trole = &Apache::lonnet::plaintext($role,$ttype);
1071: if ($env{'course.'.$tcourseid.'.description'}) {
1072: $twhere=$env{'course.'.$tcourseid.'.description'};
1073: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1074: unless ($twhere eq &mt('Currently not available')) {
1075: $twhere.=' <span class="LC_fontsize_small">'.
1076: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1077: '</span>';
1078: }
1079: } else {
1080: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1081: if (%newhash) {
1082: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
1083: "\0".$envkey;
1084: $twhere=$newhash{'description'}.
1085: ' <span class="LC_fontsize_small">'.
1086: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1087: '</span>';
1088: $ttype = $newhash{'type'};
1089: $trole = &Apache::lonnet::plaintext($role,$ttype);
1090: } else {
1091: $twhere=&mt('Currently not available');
1092: $env{'course.'.$tcourseid.'.description'}=$twhere;
1093: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1094: $ttype = 'Unavailable';
1095: }
1096: }
1097: if ($tsection) {
1098: $twhere.='<br />'.&mt('Section').': '.$tsection;
1099: }
1100: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
1101: } elsif ($tdom) {
1102: $ttype='Domain';
1103: $twhere=$tdom;
1104: $sortkey=$role.$twhere;
1105: } else {
1106: $ttype='System';
1107: $twhere=&mt('system wide');
1108: $sortkey=$role.$twhere;
1109: }
1110: ($role_text,$role_text_end) =
1111: &build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,
1112: $advanced,$tremark,$tbg,$trole,$twhere,$tpstart,
1113: $tpend,$nochoose,$button,$switchserver,$reinit);
1114: $roletext->{$envkey}=[$role_text,$role_text_end];
1115: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
1116: $sortrole->{$sortkey}=$envkey;
1117: $roleclass->{$envkey}=$ttype;
1118: }
1119: }
1120: }
1121: return ($countactive,$countfuture,$inrole,$possiblerole);
1122: }
1123:
1124: sub role_timezone {
1125: my ($where,$timezones) = @_;
1126: my $timezone;
1127: if (ref($timezones) eq 'HASH') {
1128: if ($where =~ m{^/($match_domain)/($match_courseid)}) {
1129: my $cdom = $1;
1130: my $cnum = $2;
1131: if ($cdom && $cnum) {
1132: if (!exists($timezones->{$cdom.'_'.$cnum})) {
1133: my %timehash =
1134: &Apache::lonnet::get('environment',['timezone'],$cdom,$cnum);
1135: if ($timehash{'timezone'} eq '') {
1136: if (!exists($timezones->{$cdom})) {
1137: my %domdefaults =
1138: &Apache::lonnet::get_domain_defaults($cdom);
1139: if ($domdefaults{'timezone_def'} eq '') {
1140: $timezones->{$cdom} = 'local';
1141: } else {
1142: $timezones->{$cdom} = $domdefaults{'timezone_def'};
1143: }
1144: }
1145: $timezones->{$cdom.'_'.$cnum} = $timezones->{$cdom};
1146: } else {
1147: $timezones->{$cdom.'_'.$cnum} =
1148: &Apache::lonlocal::gettimezone($timehash{'timezone'});
1149: }
1150: }
1151: $timezone = $timezones->{$cdom.'_'.$cnum};
1152: }
1153: } else {
1154: my ($tdom) = ($where =~ m{^/($match_domain)});
1155: if ($tdom) {
1156: if (!exists($timezones->{$tdom})) {
1157: my %domdefaults = &Apache::lonnet::get_domain_defaults($tdom);
1158: if ($domdefaults{'timezone_def'} eq '') {
1159: $timezones->{$tdom} = 'local';
1160: } else {
1161: $timezones->{$tdom} = $domdefaults{'timezone_def'};
1162: }
1163: }
1164: $timezone = $timezones->{$tdom};
1165: }
1166: }
1167: if ($timezone eq 'local') {
1168: $timezone = undef;
1169: }
1170: }
1171: return $timezone;
1172: }
1173:
1174: sub roletable_headers {
1175: my ($r,$roleclass,$sortrole,$nochoose) = @_;
1176: my $doheaders;
1177: if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
1178: $r->print('<br />'
1179: .&Apache::loncommon::start_data_table()
1180: .&Apache::loncommon::start_data_table_header_row()
1181: );
1182: if (!$nochoose) { $r->print('<th> </th>'); }
1183: $r->print('<th>'.&mt('User Role').'</th>'
1184: .'<th>'.&mt('Extent').'</th>'
1185: .'<th>'.&mt('Start').'</th>'
1186: .'<th>'.&mt('End').'</th>'
1187: .&Apache::loncommon::end_data_table_header_row()
1188: );
1189: $doheaders=-1;
1190: my @roletypes = &roletypes();
1191: foreach my $type (@roletypes) {
1192: my $haverole=0;
1193: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1194: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1195: $haverole=1;
1196: }
1197: }
1198: if ($haverole) { $doheaders++; }
1199: }
1200: }
1201: return $doheaders;
1202: }
1203:
1204: sub roletypes {
1205: my @types = ('Domain','Construction Space','Course','Community','Unavailable','System');
1206: return @types;
1207: }
1208:
1209: sub print_rolerows {
1210: my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
1211: if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
1212: my @types = &roletypes();
1213: foreach my $type (@types) {
1214: my $output;
1215: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1216: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1217: if (ref($roletext) eq 'HASH') {
1218: if (ref($roletext->{$sortrole->{$which}}) eq 'ARRAY') {
1219: $output.= &Apache::loncommon::start_data_table_row().
1220: $roletext->{$sortrole->{$which}}->[0].
1221: &Apache::loncommon::end_data_table_row().
1222: &Apache::loncommon::continue_data_table_row().
1223: $roletext->{$sortrole->{$which}}->[1].
1224: &Apache::loncommon::end_data_table_row();
1225: }
1226: if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
1227: if (ref($dcroles) eq 'HASH') {
1228: if ($dcroles->{$1}) {
1229: $output .= &adhoc_roles_row($1,'');
1230: }
1231: }
1232: }
1233: }
1234: }
1235: }
1236: if ($output) {
1237: if ($doheaders > 0) {
1238: $r->print(&Apache::loncommon::start_data_table_empty_row()
1239: .'<td align="center" colspan="5">'
1240: .&mt($type)
1241: .'</td>'
1242: .&Apache::loncommon::end_data_table_empty_row()
1243: );
1244: }
1245: $r->print($output);
1246: }
1247: }
1248: }
1249: }
1250:
1251: sub findcourse_advice {
1252: my ($r) = @_;
1253: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1254: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1255: if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
1256: $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
1257: <ul>
1258: <li>'.&mt('The course has yet to be created.').'</li>
1259: <li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
1260: <li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
1261: <li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
1262: <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>
1263: </ul>');
1264: } else {
1265: $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 />');
1266: }
1267: $r->print('<h3>'.&mt('Self-Enrollment').'</h3>'.
1268: '<p>'.&mt('The [_1]Course/Community Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created, as well as any communities in the domain.','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a>',$domdesc).'<br />');
1269: $r->print(&mt('You can search for courses and communities which permit self-enrollment, if you would like to enroll in one.').'</p>');
1270: &queued_selfenrollment($r);
1271: return;
1272: }
1273:
1274: sub requestcourse_advice {
1275: my ($r) = @_;
1276: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1277: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1278: my (%can_request,%request_doms);
1279: &Apache::lonnet::check_can_request($env{'user.domain'},\%can_request,\%request_doms);
1280: if (keys(%request_doms) > 0) {
1281: my ($types,$typename) = &Apache::loncommon::course_types();
1282: if ((ref($types) eq 'ARRAY') && (ref($typename) eq 'HASH')) {
1283: $r->print('<h3>'.&mt('Request creation of a course or community').'</h3>'.
1284: '<p>'.&mt('You have rights to request the creation of courses and/or communities in the following domain(s):').'<ul>');
1285: my (@reqdoms,@reqtypes);
1286: foreach my $type (sort(keys(%request_doms))) {
1287: push(@reqtypes,$type);
1288: if (ref($request_doms{$type}) eq 'ARRAY') {
1289: my $domstr = join(', ',map { &Apache::lonnet::domain($_) } sort(@{$request_doms{$type}}));
1290: $r->print(
1291: '<li>'
1292: .&mt('[_1]'.$typename->{$type}.'[_2] in domain: [_3]',
1293: '<i>',
1294: '</i>',
1295: '<b>'.$domstr.'</b>')
1296: .'</li>'
1297: );
1298: foreach my $dom (@{$request_doms{$type}}) {
1299: unless (grep(/^\Q$dom\E/,@reqdoms)) {
1300: push(@reqdoms,$dom);
1301: }
1302: }
1303: }
1304: }
1305: my @showtypes;
1306: foreach my $type (@{$types}) {
1307: if (grep(/^\Q$type\E$/,@reqtypes)) {
1308: push(@showtypes,$type);
1309: }
1310: }
1311: my $requrl = '/adm/requestcourse';
1312: if (@reqdoms == 1) {
1313: $requrl .= '?showdom='.$reqdoms[0];
1314: }
1315: if (@showtypes > 0) {
1316: $requrl.=(($requrl=~/\?/)?'&':'?').'crstype='.$showtypes[0];
1317: }
1318: if (@reqdoms == 1 || @showtypes > 0) {
1319: $requrl .= '&state=crstype&action=new';
1320: }
1321: $r->print('</ul>'.&mt('Use the [_1]request form[_2] to submit a request for creation of a new course or community.','<a href="'.$requrl.'">','</a>').'</p>');
1322: }
1323: }
1324: return;
1325: }
1326:
1327: sub queued_selfenrollment {
1328: my ($r) = @_;
1329: my %selfenrollrequests = &Apache::lonnet::dump('selfenrollrequests');
1330: my %reqs_by_date;
1331: foreach my $item (keys(%selfenrollrequests)) {
1332: if (ref($selfenrollrequests{$item}) eq 'HASH') {
1333: if ($selfenrollrequests{$item}{'status'} eq 'request') {
1334: if ($selfenrollrequests{$item}{'timestamp'}) {
1335: push(@{$reqs_by_date{$selfenrollrequests{$item}{'timestamp'}}},$item);
1336: }
1337: }
1338: }
1339: }
1340: if (keys(%reqs_by_date)) {
1341: my $rolename = &Apache::lonnet::plaintext('st');
1342: $r->print('<b>'.&mt('Enrollment requests pending Course Coordinator approval').'</b><br />'.
1343: &Apache::loncommon::start_data_table().
1344: &Apache::loncommon::start_data_table_header_row().
1345: '<th>'.&mt('Date requested').'</th><th>'.&mt('Course title').'</th>'.
1346: '<th>'.&mt('User role').'</th><th>'.&mt('Section').'</th>'.
1347: &Apache::loncommon::end_data_table_header_row());
1348: my @sorted = sort { $a <=> $b } (keys(%reqs_by_date));
1349: foreach my $item (@sorted) {
1350: if (ref($reqs_by_date{$item}) eq 'ARRAY') {
1351: foreach my $crs (@{$reqs_by_date{$item}}) {
1352: my %courseinfo = &Apache::lonnet::coursedescription($crs);
1353: my $usec = $selfenrollrequests{$crs}{'section'};
1354: if ($usec eq '') {
1355: $usec = &mt('No section');
1356: }
1357: $r->print(&Apache::loncommon::start_data_table_row().
1358: '<td>'.&Apache::lonlocal::locallocaltime($item).'</td>'.
1359: '<td>'.$courseinfo{'description'}.'</td>'.
1360: '<td>'.$rolename.'</td><td>'.$usec.'</td>'.
1361: &Apache::loncommon::end_data_table_row());
1362: }
1363: }
1364: }
1365: $r->print(&Apache::loncommon::end_data_table());
1366: }
1367: return;
1368: }
1369:
1370: sub privileges_info {
1371: my ($which) = @_;
1372: my $output;
1373:
1374: $which ||= $env{'request.role'};
1375:
1376: foreach my $envkey (sort(keys(%env))) {
1377: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
1378:
1379: my $where=$1;
1380: my $ttype;
1381: my $twhere;
1382: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
1383: if ($trest) {
1384: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
1385: $ttype='Construction Space';
1386: $twhere='User: '.$trest.', Domain: '.$tdom;
1387: } else {
1388: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
1389: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
1390: if ($tsec) {
1391: my $sec_type = 'Section';
1392: if (exists($env{"user.role.gr.$where"})) {
1393: $sec_type = 'Group';
1394: }
1395: $twhere.=' ('.$sec_type.': '.$tsec.')';
1396: }
1397: }
1398: } elsif ($tdom) {
1399: $ttype='Domain';
1400: $twhere=$tdom;
1401: } else {
1402: $ttype='System';
1403: $twhere='/';
1404: }
1405: $output .= "\n<h3>".&mt($ttype).': '.$twhere.'</h3>'."\n<ul>";
1406: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
1407: next if (!$priv);
1408:
1409: my ($prv,$restr)=split(/\&/,$priv);
1410: my $trestr='';
1411: if ($restr ne 'F') {
1412: $trestr.=' ('.
1413: join(', ',
1414: map { &Apache::lonnet::plaintext($_) }
1415: (split('',$restr))).') ';
1416: }
1417: $output .= "\n\t".
1418: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
1419: }
1420: $output .= "\n".'</ul>';
1421: }
1422: return $output;
1423: }
1424:
1425: sub build_roletext {
1426: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit) = @_;
1427: my ($roletext,$roletext_end);
1428: my $is_dc=($trolecode =~ m/^dc\./);
1429: my $rowspan=($is_dc) ? ''
1430: : ' rowspan="2" ';
1431:
1432: unless ($nochoose) {
1433: my $buttonname=$trolecode;
1434: $buttonname=~s/\W//g;
1435: if (!$button) {
1436: if ($switchserver) {
1437: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'
1438: .'<a href="/adm/switchserver?'.$switchserver.'">'
1439: .&mt('Switch Server')
1440: .'</a></td>';
1441: } else {
1442: $roletext.=('<td'.$rowspan.' class="'.$tbg.'"> </td>');
1443: }
1444: } elsif ($tstatus eq 'is') {
1445: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'.
1446: '<input name="'.$buttonname.'" type="button" value="'.
1447: &mt('Select').'" onclick="javascript:enterrole(this.form,\''.
1448: $trolecode."','".$buttonname.'\');" /></td>';
1449: } elsif ($tryagain) {
1450: $roletext.=
1451: '<td'.$rowspan.' class="'.$tbg.'">'.
1452: '<input name="'.$buttonname.'" type="button" value="'.
1453: &mt('Try Selecting Again').'" onclick="javascript:enterrole(this.form,\''.
1454: $trolecode."','".$buttonname.'\');" /></td>';
1455: } elsif ($advanced) {
1456: $roletext.=
1457: '<td'.$rowspan.' class="'.$tbg.'">'.
1458: '<input name="'.$buttonname.'" type="button" value="'.
1459: &mt('Re-Initialize').'" onclick="javascript:enterrole(this.form,\''.
1460: $trolecode."','".$buttonname.'\');" /></td>';
1461: } elsif ($reinit) {
1462: $roletext.=
1463: '<td'.$rowspan.' class="'.$tbg.'">'.
1464: '<input name="'.$buttonname.'" type="button" value="'.
1465: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1466: $trolecode."','".$buttonname.'\');" /></td>';
1467: } else {
1468: $roletext.=
1469: '<td'.$rowspan.' class="'.$tbg.'">'.
1470: '<input name="'.$buttonname.'" type="button" value="'.
1471: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1472: $trolecode."','".$buttonname.'\');" /></td>';
1473: }
1474: }
1475: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
1476: $tremark.=&Apache::lonannounce::showday(time,1,
1477: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
1478: }
1479: $roletext.='<td>'.$trole.'</td>'
1480: .'<td>'.$twhere.'</td>'
1481: .'<td>'.$tpstart.'</td>'
1482: .'<td>'.$tpend.'</td>';
1483: if (!$is_dc) {
1484: $roletext_end = '<td colspan="4">'.
1485: $tremark.' '.
1486: '</td>';
1487: }
1488: return ($roletext,$roletext_end);
1489: }
1490:
1491: sub check_needs_switchserver {
1492: my ($possiblerole) = @_;
1493: my $needs_switchserver;
1494: my ($role,$where) = split(/\./,$possiblerole,2);
1495: my (undef,$tdom,$twho) = split(/\//,$where);
1496: my ($server_status,$home);
1497: if (($role eq 'ca') || ($role eq 'aa')) {
1498: ($server_status,$home) = &check_author_homeserver($twho,$tdom);
1499: } else {
1500: ($server_status,$home) = &check_author_homeserver($env{'user.name'},
1501: $env{'user.domain'});
1502: }
1503: if ($server_status eq 'switchserver') {
1504: $needs_switchserver = 1;
1505: }
1506: return $needs_switchserver;
1507: }
1508:
1509: sub check_author_homeserver {
1510: my ($uname,$udom)=@_;
1511: if (($uname eq '') || ($udom eq '')) {
1512: return ('fail','');
1513: }
1514: my $home = &Apache::lonnet::homeserver($uname,$udom);
1515: if (&Apache::lonnet::host_domain($home) ne $udom) {
1516: return ('fail',$home);
1517: }
1518: my @ids=&Apache::lonnet::current_machine_ids();
1519: if (grep(/^\Q$home\E$/,@ids)) {
1520: return ('ok',$home);
1521: } else {
1522: return ('switchserver',$home);
1523: }
1524: }
1525:
1526: sub check_fordc {
1527: my ($dcroles,$then) = @_;
1528: my $numdc = 0;
1529: if ($env{'user.adv'}) {
1530: foreach my $envkey (sort keys %env) {
1531: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
1532: my $dcdom = $1;
1533: my $livedc = 1;
1534: my ($tstart,$tend)=split(/\./,$env{$envkey});
1535: if ($tstart && $tstart>$then) { $livedc = 0; }
1536: if ($tend && $tend <$then) { $livedc = 0; }
1537: if ($livedc) {
1538: $$dcroles{$dcdom} = $envkey;
1539: $numdc++;
1540: }
1541: }
1542: }
1543: }
1544: return $numdc;
1545: }
1546:
1547: sub adhoc_course_role {
1548: my ($refresh,$then) = @_;
1549: my ($cdom,$cnum,$crstype);
1550: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1551: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1552: $crstype = &Apache::loncommon::course_type();
1553: if (&check_forcc($cdom,$cnum,$refresh,$then,$crstype)) {
1554: my $setprivs;
1555: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
1556: $setprivs = 1;
1557: } else {
1558: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
1559: if (($start && ($start>$refresh || $start == -1)) ||
1560: ($end && $end<$then)) {
1561: $setprivs = 1;
1562: }
1563: }
1564: if ($setprivs) {
1565: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
1566: my $role = $1;
1567: my $custom_role = $2;
1568: my $usec = $3;
1569: if ($role eq 'cr') {
1570: if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
1571: $role .= $custom_role;
1572: } else {
1573: return;
1574: }
1575: }
1576: my (%userroles,%newrole,%newgroups,%group_privs);
1577: my %cgroups =
1578: &Apache::lonnet::get_active_groups($env{'user.domain'},
1579: $env{'user.name'},$cdom,$cnum);
1580: foreach my $group (keys(%cgroups)) {
1581: $group_privs{$group} =
1582: $env{'user.priv.cc./'.$cdom.'/'.$cnum.'./'.$cdom.'/'.$cnum.'/'.$group};
1583: }
1584: $newgroups{'/'.$cdom.'/'.$cnum} = \%group_privs;
1585: my $area = '/'.$cdom.'/'.$cnum;
1586: my $spec = $role.'.'.$area;
1587: if ($usec ne '') {
1588: $spec .= '/'.$usec;
1589: $area .= '/'.$usec;
1590: }
1591: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1592: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,\%newgroups);
1593: my $adhocstart = $refresh-1;
1594: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1595: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1596: }
1597: }
1598: }
1599: return;
1600: }
1601:
1602: sub check_forcc {
1603: my ($cdom,$cnum,$refresh,$then,$crstype) = @_;
1604: my ($is_cc,$ccrole);
1605: if ($crstype eq 'Community') {
1606: $ccrole = 'co';
1607: } else {
1608: $ccrole = 'cc';
1609: }
1610: if ($cdom ne '' && $cnum ne '') {
1611: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1612: my $envkey = 'user.role.'.$ccrole.'./'.$cdom.'/'.$cnum;
1613: if (defined($env{$envkey})) {
1614: $is_cc = 1;
1615: my ($tstart,$tend)=split(/\./,$env{$envkey});
1616: if ($tstart && $tstart>$refresh) { $is_cc = 0; }
1617: if ($tend && $tend <$then) { $is_cc = 0; }
1618: }
1619: }
1620: }
1621: return $is_cc;
1622: }
1623:
1624: sub courselink {
1625: my ($dcdom,$rowtype) = @_;
1626: my $courseform=&Apache::loncommon::selectcourse_link
1627: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1628: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1629: $dcdom,$dcdom,undef,'Course/Community');
1630: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1631: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1632: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1633: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1634: return $courseform.$hiddenitems;
1635: }
1636:
1637: sub coursepick_jscript {
1638: my %lt = &Apache::lonlocal::texthash(
1639: 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.",
1640: youc => 'You can only use this screen to select courses and communities in the current domain.',
1641: );
1642: my $verify_script = <<"END";
1643: <script type="text/javascript">
1644: // <![CDATA[
1645: function verifyCoursePick(caller) {
1646: var numbutton = getIndex(caller)
1647: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1648: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1649: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1650: if (pickedCourse != '') {
1651: if (numbutton != -1) {
1652: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1653: document.rolechoice.elements[numbutton+1].name = courseTarget
1654: document.rolechoice.submit()
1655: }
1656: }
1657: else {
1658: alert("$lt{'plsu'}");
1659: }
1660: }
1661: else {
1662: alert("$lt{'youc'}")
1663: }
1664: }
1665: function getIndex(caller) {
1666: for (var i=0;i<document.rolechoice.elements.length;i++) {
1667: if (document.rolechoice.elements[i] == caller) {
1668: return i;
1669: }
1670: }
1671: return -1;
1672: }
1673: // ]]>
1674: </script>
1675: END
1676: return $verify_script;
1677: }
1678:
1679: sub coauthorlink {
1680: my ($dcdom,$rowtype) = @_;
1681: my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
1682: my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
1683: return $coauthorform.$hiddenitems;
1684: }
1685:
1686: sub display_cc_role {
1687: my $rolekey = shift;
1688: my ($roletext,$roletext_end);
1689: my $advanced = $env{'user.adv'};
1690: my $tryagain = $env{'form.tryagain'};
1691: unless ($rolekey =~/^error\:/) {
1692: if ($rolekey =~ m{^user\.role\.(cc|co)\./($match_domain)/($match_courseid)$}) {
1693: my $ccrole = $1;
1694: my $tcourseid = $2.'_'.$3;
1695: my $trolecode = $1.'./'.$2.'/'.$3;
1696: my $twhere;
1697: my $ttype;
1698: my $tbg='LC_roles_is';
1699: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1700: if (%newhash) {
1701: $twhere=$newhash{'description'}.
1702: ' <span style="LC_fontsize_small">'.
1703: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1).
1704: '</span>';
1705: $ttype = $newhash{'type'};
1706: } else {
1707: $twhere=&mt('Currently not available');
1708: $env{'course.'.$tcourseid.'.description'}=$twhere;
1709: }
1710: my $trole = &Apache::lonnet::plaintext($ccrole,$ttype);
1711: $twhere.="<br />".&mt('Domain').":".$1;
1712: ($roletext,$roletext_end) = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$trole,$twhere,'','','',1,'');
1713: }
1714: }
1715: return ($roletext,$roletext_end);
1716: }
1717:
1718: sub adhoc_roles_row {
1719: my ($dcdom,$rowtype) = @_;
1720: my $output = &Apache::loncommon::continue_data_table_row()
1721: .' <td colspan="5">'
1722: .&mt('[_1]Ad hoc[_2] roles in domain [_3] --'
1723: ,'<span class="LC_cusr_emph">','</span>',$dcdom)
1724: .' ';
1725: my $selectcclink = &courselink($dcdom,$rowtype);
1726: my $ccrole = &Apache::lonnet::plaintext('co',undef,undef,1);
1727: my $carole = &Apache::lonnet::plaintext('ca');
1728: my $selectcalink = &coauthorlink($dcdom,$rowtype);
1729: $output.=$ccrole.': '.$selectcclink
1730: .' | '.$carole.': '.$selectcalink
1731: .&Apache::loncommon::end_data_table_row();
1732: return $output;
1733: }
1734:
1735: sub recent_filename {
1736: my $area=shift;
1737: return 'nohist_recent_'.&escape($area);
1738: }
1739:
1740: sub courseloadpage {
1741: my ($courseid) = @_;
1742: my $startpage;
1743: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1744: [$courseid.':courseinit']);
1745: my ($tmp) = %entry_settings;
1746: unless ($tmp =~ /^error: 2 /) {
1747: $startpage = $entry_settings{$courseid.':courseinit'};
1748: }
1749: if ($startpage eq '') {
1750: if (exists($env{'environment.course_init_display'})) {
1751: $startpage = $env{'environment.course_init_display'};
1752: }
1753: }
1754: return $startpage;
1755: }
1756:
1757: 1;
1758: __END__
1759:
1760: =head1 NAME
1761:
1762: Apache::lonroles - User Roles Screen
1763:
1764: =head1 SYNOPSIS
1765:
1766: Invoked by /etc/httpd/conf/srm.conf:
1767:
1768: <Location /adm/roles>
1769: PerlAccessHandler Apache::lonacc
1770: SetHandler perl-script
1771: PerlHandler Apache::lonroles
1772: ErrorDocument 403 /adm/login
1773: ErrorDocument 500 /adm/errorhandler
1774: </Location>
1775:
1776: =head1 OVERVIEW
1777:
1778: =head2 Choosing Roles
1779:
1780: C<lonroles> is a handler that allows a user to switch roles in
1781: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1782: default role that a user has before selecting a role, as widely as
1783: possible, but certain handlers for example need specification which
1784: course they should act on, etc. Both in this scenario, and when the
1785: handler determines via C<lonnet>'s C<&allowed> function that a certain
1786: action is not allowed, C<lonroles> is used as error handler. This
1787: allows the user to select another role which may have permission to do
1788: what they were trying to do. C<lonroles> can also be accessed via the
1789: B<CRS> button in the Remote Control.
1790:
1791: =begin latex
1792:
1793: \begin{figure}
1794: \begin{center}
1795: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1796: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1797: \end{center}
1798: \end{figure}
1799:
1800: =end latex
1801:
1802: =head2 Role Initialization
1803:
1804: 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.
1805:
1806: =head1 INTRODUCTION
1807:
1808: This module enables a user to select what role he wishes to
1809: operate under (instructor, student, teaching assistant, course
1810: coordinator, etc). These roles are pre-established by the actions
1811: of upper-level users.
1812:
1813: This is part of the LearningOnline Network with CAPA project
1814: described at http://www.lon-capa.org.
1815:
1816: =head1 HANDLER SUBROUTINE
1817:
1818: This routine is called by Apache and mod_perl.
1819:
1820: =over 4
1821:
1822: =item *
1823:
1824: Roles Initialization (yes/no)
1825:
1826: =item *
1827:
1828: Get Error Message from Environment
1829:
1830: =item *
1831:
1832: Who is this?
1833:
1834: =item *
1835:
1836: Generate Page Output
1837:
1838: =item *
1839:
1840: Choice or no choice
1841:
1842: =item *
1843:
1844: Table
1845:
1846: =item *
1847:
1848: Privileges
1849:
1850: =back
1851:
1852: =cut
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