1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.240.2.11 2010/01/16 19:57:01 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' => $refresh});
726: if (!$countactive && !$countfuture) {
727: if (&Apache::loncommon::new_roles_update()) {
728: ($countactive,$countfuture,$inrole,$possiblerole) =
729: &gather_roles($then,$refresh,$now,$reinit,$nochoose,\%roletext,\%sortrole,
730: \%roleclass,\%futureroles,\%timezones);
731: }
732: }
733: if ($custommenu) {
734: if ($env{'form.destinationurl'} eq '/adm/gci_info') {
735: $r->print(&gci_info_page()).
736: &Apache::loncommon::end_page();
737: return OK;
738: }
739: my %courses = &Apache::loncommon::existing_gcitest_courses('cc');
740: $env{'browser.interface'}='faketextual';
741: $env{'environment.remote'}='off';
742: my $numcourses = keys(%courses);
743: my $switcher;
744: if ($numcourses > 0) {
745: $switcher = &Apache::lonmainmenu::gcitest_switcher('cc',%courses);
746: my $current;
747: if ($env{'request.course.id'}) {
748: $current = 'cc./'.$env{'course.'.$env{'request.course.id'}.'.domain'}.
749: '/'.$env{'course.'.$env{'request.course.id'}.'.num'};
750: }
751: my $switcher_js = &Apache::lonmainmenu::gcitest_switcher_js($current,$numcourses);
752: $r->print(<<"ENDSCRIPT");
753: <script type="text/javascript">
754: // <![CDATA[
755: $switcher_js
756: // ]]>
757: </script>
758: ENDSCRIPT
759: }
760: $r->print(&Apache::lonmenu::inlinemenu('gcicustom',$switcher).
761: &Apache::loncommon::end_page());
762: return OK;
763: } else {
764: if ($env{'form.destinationurl'} eq '/adm/gci_info') {
765: delete($env{'form.destinationurl'});
766: }
767: }
768: if ($env{'user.adv'}) {
769: $r->print('<p><label><input type="checkbox" name="showall"');
770: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
771: $r->print(' />'.&mt('Show all roles').'</label>'
772: .' <input type="submit" value="'.&mt('Update display').'" />'
773: .'</p>');
774: } else {
775: if ($countactive > 0) {
776: $r->print(&Apache::loncoursequeueadmin::queued_selfenrollment());
777: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
778: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
779: unless ($env{'user.domain'} eq 'gcitest') {
780: $r->print(
781: '<p>'
782: .&mt('[_1]Visit the [_2]Course/Community Catalog[_3]'
783: .' to view all [_4] LON-CAPA courses and communities.'
784: ,'<b>'
785: ,'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
786: ,'</a></b>',$domdesc)
787: .'<br />'
788: .&mt('If a course or community is [_1]not[_2] in your list of current courses and communities below,'
789: .' you may be able to enroll if self-enrollment is permitted.'
790: ,'<b>','</b>')
791: .'</p>'
792: );
793: }
794: }
795: }
796:
797: # No active roles
798: if ($countactive==0) {
799: if ($inrole) {
800: $r->print('<h2>'.&mt('Currently no additional roles, courses or communities').'</h2>');
801: } else {
802: $r->print('<h2>'.&mt('Currently no active roles, courses or communities').'</h2>');
803: }
804: unless ($env{'user.domain'} eq 'gcitest') {
805: &findcourse_advice($r);
806: &requestcourse_advice($r);
807: }
808: $r->print('</form>');
809: if ($countfuture) {
810: $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
811: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
812: $nochoose);
813: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
814: \%roletext);
815: my $tremark='';
816: my $tbg;
817: if ($env{'request.role'} eq 'cm') {
818: $tbg="LC_roles_selected";
819: $tremark=&mt('Currently selected.').' ';
820: } else {
821: $tbg="LC_roles_is";
822: }
823: $r->print(&Apache::loncommon::start_data_table_row()
824: .'<td class="'.$tbg.'"> </td>'
825: .'<td colspan="3">'
826: .&mt('No role specified')
827: .'</td>'
828: .'<td>'.$tremark.' </td>'
829: .&Apache::loncommon::end_data_table_row()
830: );
831:
832: $r->print(&Apache::loncommon::end_data_table());
833: }
834: $r->print(&Apache::loncommon::end_page());
835: return OK;
836: } elsif ($countactive==1) { # Is there only one choice?
837: my $needs_switchserver;
838: if ($env{'user.author'}) {
839: $needs_switchserver = &check_needs_switchserver($possiblerole);
840: }
841: if ((!$needs_switchserver) && ($env{'request.role'} eq 'cm')) {
842: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
843: '<input type="hidden" name="'.$possiblerole.'" value="1" />'.
844: '<noscript><br /><input type="submit" name="submit" value="'.&mt('Continue').'" /></noscript>');
845: $r->print("</form>\n");
846: $r->rflush();
847: $r->print('<script type="text/javascript">document.forms.rolechoice.submit();</script>');
848: $r->print(&Apache::loncommon::end_page());
849: return OK;
850: }
851: if ($needs_switchserver) {
852: $r->print("<h2>".&mt('Server Switch Required')."</h2>\n".
853: &mt('Construction Space access is only available from '.
854: 'the home server of the corresponding Author.').'<br />'.
855: &mt("Click the 'Switch Server' link to go there.").'<br />');
856: }
857: }
858: # ----------------------------------------------------------------------- Table
859: unless ((!&Apache::loncommon::show_course()) || ($nochoose) || ($countactive==1)) {
860: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
861: }
862: if ($env{'form.destinationurl'}) {
863: $r->print('<input type="hidden" name="destinationurl" value="'.
864: $env{'form.destinationurl'}.'" />');
865: if ($env{'form.destsymb'} ne '') {
866: $r->print('<input type="hidden" name="destsymb" value="'.
867: $env{'form.destsymb'}.'" />');
868: }
869: }
870: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
871: if ($env{'environment.recentroles'}) {
872: my %recent_roles =
873: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
874: my $output='';
875: foreach (sort(keys(%recent_roles))) {
876: if (ref($roletext{'user.role.'.$_}) eq 'ARRAY') {
877: $output.= &Apache::loncommon::start_data_table_row().
878: $roletext{'user.role.'.$_}->[0].
879: &Apache::loncommon::end_data_table_row().
880: &Apache::loncommon::continue_data_table_row().
881: $roletext{'user.role.'.$_}->[1].
882: &Apache::loncommon::end_data_table_row();
883: if ($_ =~ m-dc\./($match_domain)/-
884: && $dcroles{$1}) {
885: $output .= &adhoc_roles_row($1,'recent');
886: }
887: } elsif ($numdc > 0) {
888: unless ($_ =~/^error\:/) {
889: $output.=&display_cc_role('user.role.'.$_);
890: }
891: }
892: }
893: if ($output) {
894: $r->print(&Apache::loncommon::start_data_table_empty_row()
895: .'<td align="center" colspan="5">'
896: .$recent
897: .'</td>'
898: .&Apache::loncommon::end_data_table_empty_row()
899: );
900: $r->print($output);
901: $doheaders ++;
902: }
903: }
904:
905: if ($numdc > 0) {
906: $r->print(&coursepick_jscript());
907: $r->print(&Apache::loncommon::coursebrowser_javascript().
908: &Apache::loncommon::authorbrowser_javascript());
909: }
910: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
911: if ($countactive > 1) {
912: my $tremark='';
913: my $tbg;
914: if ($env{'request.role'} eq 'cm') {
915: $tbg="LC_roles_selected";
916: $tremark=&mt('Currently selected.').' ';
917: } else {
918: $tbg="LC_roles_is";
919: }
920: $r->print(&Apache::loncommon::start_data_table_row());
921: unless ($nochoose) {
922: if ($env{'request.role'} ne 'cm') {
923: $r->print('<td class="'.$tbg.'"><input type="submit" value="'.
924: &mt('Select').'" name="cm" /></td>');
925: } else {
926: $r->print('<td class="'.$tbg.'"> </td>');
927: }
928: }
929: $r->print('<td colspan="3">'
930: .&mt('No role specified')
931: .'</td>'
932: .'<td>'.$tremark.' </td>'
933: .&Apache::loncommon::end_data_table_row()
934: );
935: }
936: $r->print(&Apache::loncommon::end_data_table());
937: unless ($nochoose) {
938: $r->print("</form>\n");
939: }
940: # ------------------------------------------------------------ Privileges Info
941: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
942: $r->print('<hr /><h2>'.&mt('Current Privileges').'</h2>');
943: $r->print(&privileges_info());
944: }
945: $r->print(&Apache::lonnet::getannounce());
946: if ($advanced) {
947: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
948: $r->print('<p><small><i>'
949: .&mt('This LON-CAPA server is version [_1]',$r->dir_config('lonVersion'))
950: .'</i><br />'
951: .'<a href="/adm/logout">'.&mt('Logout').'</a> '
952: .'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
953: .&mt('Course/Community Catalog')
954: .'</a></small></p>');
955: }
956: $r->print(&Apache::loncommon::end_page());
957: return OK;
958: }
959:
960: sub gci_info_page {
961: return <<"END";
962: <h2>Welcome to the Geoscience Concept Inventory WebCenter</h2>
963: <p>
964: Use the tabs to navigate the WebCenter and...
965: <ul>
966: <li>Review and comment on existing GCI questions</li>
967: <li>Submit a GCI question of your own</li>
968: <li>Create an online test for your students</li>
969: </ul>
970: </p>
971: <p>For more information about writing and reviewing Concept Inventory questions
972: please refer to the <a href="/res/gci/gci/internal/pdfs/GCIWorkbook.pdf">GCI Workbook</a>.
973:
974: END
975: }
976:
977: sub gather_roles {
978: my ($then,$refresh,$now,$reinit,$nochoose,$roletext,$sortrole,$roleclass,$futureroles,$timezones) = @_;
979: my ($countactive,$countfuture,$inrole,$possiblerole) = (0,0,0,'');
980: my $advanced = $env{'user.adv'};
981: my $tryagain = $env{'form.tryagain'};
982: foreach my $envkey (sort(keys(%env))) {
983: my $button = 1;
984: my $switchserver='';
985: my ($role_text,$role_text_end,$sortkey);
986: if ($envkey=~/^user\.role\./) {
987: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
988: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
989: \$trolecode,\$tstatus,\$tstart,\$tend);
990: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
991: my $timezone = &role_timezone($where,$timezones);
992: $tremark='';
993: $tpstart=' ';
994: $tpend=' ';
995: if ($tstart) {
996: $tpstart=&Apache::lonlocal::locallocaltime($tstart,$timezone);
997: }
998: if ($tend) {
999: $tpend=&Apache::lonlocal::locallocaltime($tend,$timezone);
1000: }
1001: if ($env{'request.role'} eq $trolecode) {
1002: $tstatus='selected';
1003: }
1004: my $tbg;
1005: if (($tstatus eq 'is')
1006: || ($tstatus eq 'selected')
1007: || ($tstatus eq 'future')
1008: || ($env{'form.showall'})) {
1009: if ($tstatus eq 'is') {
1010: $tbg='LC_roles_is';
1011: $possiblerole=$trolecode;
1012: $countactive++;
1013: } elsif ($tstatus eq 'future') {
1014: $tbg='LC_roles_future';
1015: $button=0;
1016: $futureroles->{$trolecode} = $tstart.':'.$tend;
1017: $countfuture ++;
1018: } elsif ($tstatus eq 'expired') {
1019: $tbg='LC_roles_expired';
1020: $button=0;
1021: } elsif ($tstatus eq 'will_not') {
1022: $tbg='LC_roles_will_not';
1023: $tremark.=&mt('Expired after logout.').' ';
1024: } elsif ($tstatus eq 'selected') {
1025: $tbg='LC_roles_selected';
1026: $inrole=1;
1027: $countactive++;
1028: $tremark.=&mt('Currently selected.').' ';
1029: }
1030: my $trole;
1031: if ($role =~ /^cr\//) {
1032: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
1033: if ($tremark) { $tremark.='<br />'; }
1034: $tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
1035: }
1036: $trole=Apache::lonnet::plaintext($role);
1037: my $ttype;
1038: my $twhere;
1039: my ($tdom,$trest,$tsection)=
1040: split(/\//,Apache::lonnet::declutter($where));
1041: # First, Co-Authorship roles
1042: if (($role eq 'ca') || ($role eq 'aa')) {
1043: my $home = &Apache::lonnet::homeserver($trest,$tdom);
1044: my $allowed=0;
1045: my @ids=&Apache::lonnet::current_machine_ids();
1046: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1047: if (!$allowed) {
1048: $button=0;
1049: $switchserver='otherserver='.$home.'&role='.$trolecode;
1050: }
1051: #next if ($home eq 'no_host');
1052: $home = &Apache::lonnet::hostname($home);
1053: $ttype='Construction Space';
1054: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
1055: ': '.$tdom.'<br />'.
1056: ' '.&mt('Server').': '.$home;
1057: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1058: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
1059: $sortkey=$role."$trest:$tdom";
1060: } elsif ($role eq 'au') {
1061: # Authors
1062: my $home = &Apache::lonnet::homeserver
1063: ($env{'user.name'},$env{'user.domain'});
1064: my $allowed=0;
1065: my @ids=&Apache::lonnet::current_machine_ids();
1066: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
1067: if (!$allowed) {
1068: $button=0;
1069: $switchserver='otherserver='.$home.'&role='.$trolecode;
1070: }
1071: #next if ($home eq 'no_host');
1072: $home = &Apache::lonnet::hostname($home);
1073: $ttype='Construction Space';
1074: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
1075: ': '.$home;
1076: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1077: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
1078: $sortkey=$role;
1079: } elsif ($trest) {
1080: my $tcourseid=$tdom.'_'.$trest;
1081: $ttype = &Apache::loncommon::course_type($tcourseid);
1082: $trole = &Apache::lonnet::plaintext($role,$ttype);
1083: if ($env{'course.'.$tcourseid.'.description'}) {
1084: $twhere=$env{'course.'.$tcourseid.'.description'};
1085: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1086: unless ($twhere eq &mt('Currently not available')) {
1087: $twhere.=' <span class="LC_fontsize_small">'.
1088: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1089: '</span>';
1090: }
1091: } else {
1092: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1093: if (%newhash) {
1094: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
1095: "\0".$envkey;
1096: $twhere=$newhash{'description'}.
1097: ' <span class="LC_fontsize_small">'.
1098: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1099: '</span>';
1100: $ttype = $newhash{'type'};
1101: $trole = &Apache::lonnet::plaintext($role,$ttype);
1102: } else {
1103: $twhere=&mt('Currently not available');
1104: $env{'course.'.$tcourseid.'.description'}=$twhere;
1105: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1106: $ttype = 'Unavailable';
1107: }
1108: }
1109: if ($tsection) {
1110: $twhere.='<br />'.&mt('Section').': '.$tsection;
1111: }
1112: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
1113: } elsif ($tdom) {
1114: $ttype='Domain';
1115: $twhere=$tdom;
1116: $sortkey=$role.$twhere;
1117: } else {
1118: $ttype='System';
1119: $twhere=&mt('system wide');
1120: $sortkey=$role.$twhere;
1121: }
1122: ($role_text,$role_text_end) =
1123: &build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,
1124: $advanced,$tremark,$tbg,$trole,$twhere,$tpstart,
1125: $tpend,$nochoose,$button,$switchserver,$reinit);
1126: $roletext->{$envkey}=[$role_text,$role_text_end];
1127: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
1128: $sortrole->{$sortkey}=$envkey;
1129: $roleclass->{$envkey}=$ttype;
1130: }
1131: }
1132: }
1133: return ($countactive,$countfuture,$inrole,$possiblerole);
1134: }
1135:
1136: sub role_timezone {
1137: my ($where,$timezones) = @_;
1138: my $timezone;
1139: if (ref($timezones) eq 'HASH') {
1140: if ($where =~ m{^/($match_domain)/($match_courseid)}) {
1141: my $cdom = $1;
1142: my $cnum = $2;
1143: if ($cdom && $cnum) {
1144: if (!exists($timezones->{$cdom.'_'.$cnum})) {
1145: my %timehash =
1146: &Apache::lonnet::get('environment',['timezone'],$cdom,$cnum);
1147: if ($timehash{'timezone'} eq '') {
1148: if (!exists($timezones->{$cdom})) {
1149: my %domdefaults =
1150: &Apache::lonnet::get_domain_defaults($cdom);
1151: if ($domdefaults{'timezone_def'} eq '') {
1152: $timezones->{$cdom} = 'local';
1153: } else {
1154: $timezones->{$cdom} = $domdefaults{'timezone_def'};
1155: }
1156: }
1157: $timezones->{$cdom.'_'.$cnum} = $timezones->{$cdom};
1158: } else {
1159: $timezones->{$cdom.'_'.$cnum} =
1160: &Apache::lonlocal::gettimezone($timehash{'timezone'});
1161: }
1162: }
1163: $timezone = $timezones->{$cdom.'_'.$cnum};
1164: }
1165: } else {
1166: my ($tdom) = ($where =~ m{^/($match_domain)});
1167: if ($tdom) {
1168: if (!exists($timezones->{$tdom})) {
1169: my %domdefaults = &Apache::lonnet::get_domain_defaults($tdom);
1170: if ($domdefaults{'timezone_def'} eq '') {
1171: $timezones->{$tdom} = 'local';
1172: } else {
1173: $timezones->{$tdom} = $domdefaults{'timezone_def'};
1174: }
1175: }
1176: $timezone = $timezones->{$tdom};
1177: }
1178: }
1179: if ($timezone eq 'local') {
1180: $timezone = undef;
1181: }
1182: }
1183: return $timezone;
1184: }
1185:
1186: sub roletable_headers {
1187: my ($r,$roleclass,$sortrole,$nochoose) = @_;
1188: my $doheaders;
1189: if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
1190: $r->print('<br />'
1191: .&Apache::loncommon::start_data_table()
1192: .&Apache::loncommon::start_data_table_header_row()
1193: );
1194: if (!$nochoose) { $r->print('<th> </th>'); }
1195: $r->print('<th>'.&mt('User Role').'</th>'
1196: .'<th>'.&mt('Extent').'</th>'
1197: .'<th>'.&mt('Start').'</th>'
1198: .'<th>'.&mt('End').'</th>'
1199: .&Apache::loncommon::end_data_table_header_row()
1200: );
1201: $doheaders=-1;
1202: my @roletypes = &roletypes();
1203: foreach my $type (@roletypes) {
1204: my $haverole=0;
1205: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1206: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1207: $haverole=1;
1208: }
1209: }
1210: if ($haverole) { $doheaders++; }
1211: }
1212: }
1213: return $doheaders;
1214: }
1215:
1216: sub roletypes {
1217: my @types = ('Domain','Construction Space','Course','Community','Unavailable','System');
1218: return @types;
1219: }
1220:
1221: sub print_rolerows {
1222: my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
1223: if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
1224: my @types = &roletypes();
1225: foreach my $type (@types) {
1226: my $output;
1227: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
1228: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
1229: if (ref($roletext) eq 'HASH') {
1230: if (ref($roletext->{$sortrole->{$which}}) eq 'ARRAY') {
1231: $output.= &Apache::loncommon::start_data_table_row().
1232: $roletext->{$sortrole->{$which}}->[0].
1233: &Apache::loncommon::end_data_table_row().
1234: &Apache::loncommon::continue_data_table_row().
1235: $roletext->{$sortrole->{$which}}->[1].
1236: &Apache::loncommon::end_data_table_row();
1237: }
1238: if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
1239: if (ref($dcroles) eq 'HASH') {
1240: if ($dcroles->{$1}) {
1241: $output .= &adhoc_roles_row($1,'');
1242: }
1243: }
1244: }
1245: }
1246: }
1247: }
1248: if ($output) {
1249: if ($doheaders > 0) {
1250: $r->print(&Apache::loncommon::start_data_table_empty_row()
1251: .'<td align="center" colspan="5">'
1252: .&mt($type)
1253: .'</td>'
1254: .&Apache::loncommon::end_data_table_empty_row()
1255: );
1256: }
1257: $r->print($output);
1258: }
1259: }
1260: }
1261: }
1262:
1263: sub findcourse_advice {
1264: my ($r) = @_;
1265: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1266: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1267: if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
1268: $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
1269: <ul>
1270: <li>'.&mt('The course has yet to be created.').'</li>
1271: <li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
1272: <li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
1273: <li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
1274: <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>
1275: </ul>');
1276: } else {
1277: $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 />');
1278: }
1279: $r->print('<h3>'.&mt('Self-Enrollment').'</h3>'.
1280: '<p>'.&mt('The [_1]Course/Community Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created, as well as any communities in the domain.','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a>',$domdesc).'<br />');
1281: $r->print(&mt('You can search for courses and communities which permit self-enrollment, if you would like to enroll in one.').'</p>'.
1282: &Apache::loncoursequeueadmin::queued_selfenrollment());
1283: return;
1284: }
1285:
1286: sub requestcourse_advice {
1287: my ($r) = @_;
1288: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1289: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1290: my (%can_request,%request_doms);
1291: &Apache::lonnet::check_can_request($env{'user.domain'},\%can_request,\%request_doms);
1292: if (keys(%request_doms) > 0) {
1293: my ($types,$typename) = &Apache::loncommon::course_types();
1294: if ((ref($types) eq 'ARRAY') && (ref($typename) eq 'HASH')) {
1295: $r->print('<h3>'.&mt('Request creation of a course or community').'</h3>'.
1296: '<p>'.&mt('You have rights to request the creation of courses and/or communities in the following domain(s):').'<ul>');
1297: my (@reqdoms,@reqtypes);
1298: foreach my $type (sort(keys(%request_doms))) {
1299: push(@reqtypes,$type);
1300: if (ref($request_doms{$type}) eq 'ARRAY') {
1301: my $domstr = join(', ',map { &Apache::lonnet::domain($_) } sort(@{$request_doms{$type}}));
1302: $r->print(
1303: '<li>'
1304: .&mt('[_1]'.$typename->{$type}.'[_2] in domain: [_3]',
1305: '<i>',
1306: '</i>',
1307: '<b>'.$domstr.'</b>')
1308: .'</li>'
1309: );
1310: foreach my $dom (@{$request_doms{$type}}) {
1311: unless (grep(/^\Q$dom\E/,@reqdoms)) {
1312: push(@reqdoms,$dom);
1313: }
1314: }
1315: }
1316: }
1317: my @showtypes;
1318: foreach my $type (@{$types}) {
1319: if (grep(/^\Q$type\E$/,@reqtypes)) {
1320: push(@showtypes,$type);
1321: }
1322: }
1323: my $requrl = '/adm/requestcourse';
1324: if (@reqdoms == 1) {
1325: $requrl .= '?showdom='.$reqdoms[0];
1326: }
1327: if (@showtypes > 0) {
1328: $requrl.=(($requrl=~/\?/)?'&':'?').'crstype='.$showtypes[0];
1329: }
1330: if (@reqdoms == 1 || @showtypes > 0) {
1331: $requrl .= '&state=crstype&action=new';
1332: }
1333: $r->print('</ul>'.&mt('Use the [_1]request form[_2] to submit a request for creation of a new course or community.','<a href="'.$requrl.'">','</a>').'</p>');
1334: }
1335: }
1336: return;
1337: }
1338:
1339: sub queued_selfenrollment {
1340: my ($r) = @_;
1341: my %selfenrollrequests = &Apache::lonnet::dump('selfenrollrequests');
1342: my %reqs_by_date;
1343: foreach my $item (keys(%selfenrollrequests)) {
1344: if (ref($selfenrollrequests{$item}) eq 'HASH') {
1345: if ($selfenrollrequests{$item}{'status'} eq 'request') {
1346: if ($selfenrollrequests{$item}{'timestamp'}) {
1347: push(@{$reqs_by_date{$selfenrollrequests{$item}{'timestamp'}}},$item);
1348: }
1349: }
1350: }
1351: }
1352: if (keys(%reqs_by_date)) {
1353: my $rolename = &Apache::lonnet::plaintext('st');
1354: $r->print('<b>'.&mt('Enrollment requests pending Course Coordinator approval').'</b><br />'.
1355: &Apache::loncommon::start_data_table().
1356: &Apache::loncommon::start_data_table_header_row().
1357: '<th>'.&mt('Date requested').'</th><th>'.&mt('Course title').'</th>'.
1358: '<th>'.&mt('User role').'</th><th>'.&mt('Section').'</th>'.
1359: &Apache::loncommon::end_data_table_header_row());
1360: my @sorted = sort { $a <=> $b } (keys(%reqs_by_date));
1361: foreach my $item (@sorted) {
1362: if (ref($reqs_by_date{$item}) eq 'ARRAY') {
1363: foreach my $crs (@{$reqs_by_date{$item}}) {
1364: my %courseinfo = &Apache::lonnet::coursedescription($crs);
1365: my $usec = $selfenrollrequests{$crs}{'section'};
1366: if ($usec eq '') {
1367: $usec = &mt('No section');
1368: }
1369: $r->print(&Apache::loncommon::start_data_table_row().
1370: '<td>'.&Apache::lonlocal::locallocaltime($item).'</td>'.
1371: '<td>'.$courseinfo{'description'}.'</td>'.
1372: '<td>'.$rolename.'</td><td>'.$usec.'</td>'.
1373: &Apache::loncommon::end_data_table_row());
1374: }
1375: }
1376: }
1377: $r->print(&Apache::loncommon::end_data_table());
1378: }
1379: return;
1380: }
1381:
1382: sub privileges_info {
1383: my ($which) = @_;
1384: my $output;
1385:
1386: $which ||= $env{'request.role'};
1387:
1388: foreach my $envkey (sort(keys(%env))) {
1389: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
1390:
1391: my $where=$1;
1392: my $ttype;
1393: my $twhere;
1394: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
1395: if ($trest) {
1396: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
1397: $ttype='Construction Space';
1398: $twhere='User: '.$trest.', Domain: '.$tdom;
1399: } else {
1400: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
1401: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
1402: if ($tsec) {
1403: my $sec_type = 'Section';
1404: if (exists($env{"user.role.gr.$where"})) {
1405: $sec_type = 'Group';
1406: }
1407: $twhere.=' ('.$sec_type.': '.$tsec.')';
1408: }
1409: }
1410: } elsif ($tdom) {
1411: $ttype='Domain';
1412: $twhere=$tdom;
1413: } else {
1414: $ttype='System';
1415: $twhere='/';
1416: }
1417: $output .= "\n<h3>".&mt($ttype).': '.$twhere.'</h3>'."\n<ul>";
1418: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
1419: next if (!$priv);
1420:
1421: my ($prv,$restr)=split(/\&/,$priv);
1422: my $trestr='';
1423: if ($restr ne 'F') {
1424: $trestr.=' ('.
1425: join(', ',
1426: map { &Apache::lonnet::plaintext($_) }
1427: (split('',$restr))).') ';
1428: }
1429: $output .= "\n\t".
1430: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
1431: }
1432: $output .= "\n".'</ul>';
1433: }
1434: return $output;
1435: }
1436:
1437: sub build_roletext {
1438: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit) = @_;
1439: my ($roletext,$roletext_end);
1440: my $is_dc=($trolecode =~ m/^dc\./);
1441: my $rowspan=($is_dc) ? ''
1442: : ' rowspan="2" ';
1443:
1444: unless ($nochoose) {
1445: my $buttonname=$trolecode;
1446: $buttonname=~s/\W//g;
1447: if (!$button) {
1448: if ($switchserver) {
1449: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'
1450: .'<a href="/adm/switchserver?'.$switchserver.'">'
1451: .&mt('Switch Server')
1452: .'</a></td>';
1453: } else {
1454: $roletext.=('<td'.$rowspan.' class="'.$tbg.'"> </td>');
1455: }
1456: } elsif ($tstatus eq 'is') {
1457: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'.
1458: '<input name="'.$buttonname.'" type="button" value="'.
1459: &mt('Select').'" onclick="javascript:enterrole(this.form,\''.
1460: $trolecode."','".$buttonname.'\');" /></td>';
1461: } elsif ($tryagain) {
1462: $roletext.=
1463: '<td'.$rowspan.' class="'.$tbg.'">'.
1464: '<input name="'.$buttonname.'" type="button" value="'.
1465: &mt('Try Selecting Again').'" onclick="javascript:enterrole(this.form,\''.
1466: $trolecode."','".$buttonname.'\');" /></td>';
1467: } elsif ($advanced) {
1468: $roletext.=
1469: '<td'.$rowspan.' class="'.$tbg.'">'.
1470: '<input name="'.$buttonname.'" type="button" value="'.
1471: &mt('Re-Initialize').'" onclick="javascript:enterrole(this.form,\''.
1472: $trolecode."','".$buttonname.'\');" /></td>';
1473: } elsif ($reinit) {
1474: $roletext.=
1475: '<td'.$rowspan.' class="'.$tbg.'">'.
1476: '<input name="'.$buttonname.'" type="button" value="'.
1477: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1478: $trolecode."','".$buttonname.'\');" /></td>';
1479: } else {
1480: $roletext.=
1481: '<td'.$rowspan.' class="'.$tbg.'">'.
1482: '<input name="'.$buttonname.'" type="button" value="'.
1483: &mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
1484: $trolecode."','".$buttonname.'\');" /></td>';
1485: }
1486: }
1487: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
1488: $tremark.=&Apache::lonannounce::showday(time,1,
1489: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
1490: }
1491: $roletext.='<td>'.$trole.'</td>'
1492: .'<td>'.$twhere.'</td>'
1493: .'<td>'.$tpstart.'</td>'
1494: .'<td>'.$tpend.'</td>';
1495: if (!$is_dc) {
1496: $roletext_end = '<td colspan="4">'.
1497: $tremark.' '.
1498: '</td>';
1499: }
1500: return ($roletext,$roletext_end);
1501: }
1502:
1503: sub check_needs_switchserver {
1504: my ($possiblerole) = @_;
1505: my $needs_switchserver;
1506: my ($role,$where) = split(/\./,$possiblerole,2);
1507: my (undef,$tdom,$twho) = split(/\//,$where);
1508: my ($server_status,$home);
1509: if (($role eq 'ca') || ($role eq 'aa')) {
1510: ($server_status,$home) = &check_author_homeserver($twho,$tdom);
1511: } else {
1512: ($server_status,$home) = &check_author_homeserver($env{'user.name'},
1513: $env{'user.domain'});
1514: }
1515: if ($server_status eq 'switchserver') {
1516: $needs_switchserver = 1;
1517: }
1518: return $needs_switchserver;
1519: }
1520:
1521: sub check_author_homeserver {
1522: my ($uname,$udom)=@_;
1523: if (($uname eq '') || ($udom eq '')) {
1524: return ('fail','');
1525: }
1526: my $home = &Apache::lonnet::homeserver($uname,$udom);
1527: if (&Apache::lonnet::host_domain($home) ne $udom) {
1528: return ('fail',$home);
1529: }
1530: my @ids=&Apache::lonnet::current_machine_ids();
1531: if (grep(/^\Q$home\E$/,@ids)) {
1532: return ('ok',$home);
1533: } else {
1534: return ('switchserver',$home);
1535: }
1536: }
1537:
1538: sub check_fordc {
1539: my ($dcroles,$then) = @_;
1540: my $numdc = 0;
1541: if ($env{'user.adv'}) {
1542: foreach my $envkey (sort keys %env) {
1543: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
1544: my $dcdom = $1;
1545: my $livedc = 1;
1546: my ($tstart,$tend)=split(/\./,$env{$envkey});
1547: if ($tstart && $tstart>$then) { $livedc = 0; }
1548: if ($tend && $tend <$then) { $livedc = 0; }
1549: if ($livedc) {
1550: $$dcroles{$dcdom} = $envkey;
1551: $numdc++;
1552: }
1553: }
1554: }
1555: }
1556: return $numdc;
1557: }
1558:
1559: sub adhoc_course_role {
1560: my ($refresh,$then) = @_;
1561: my ($cdom,$cnum,$crstype);
1562: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1563: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1564: $crstype = &Apache::loncommon::course_type();
1565: if (&check_forcc($cdom,$cnum,$refresh,$then,$crstype)) {
1566: my $setprivs;
1567: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
1568: $setprivs = 1;
1569: } else {
1570: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
1571: if (($start && ($start>$refresh || $start == -1)) ||
1572: ($end && $end<$then)) {
1573: $setprivs = 1;
1574: }
1575: }
1576: if ($setprivs) {
1577: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
1578: my $role = $1;
1579: my $custom_role = $2;
1580: my $usec = $3;
1581: if ($role eq 'cr') {
1582: if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
1583: $role .= $custom_role;
1584: } else {
1585: return;
1586: }
1587: }
1588: my (%userroles,%newrole,%newgroups,%group_privs);
1589: my %cgroups =
1590: &Apache::lonnet::get_active_groups($env{'user.domain'},
1591: $env{'user.name'},$cdom,$cnum);
1592: foreach my $group (keys(%cgroups)) {
1593: $group_privs{$group} =
1594: $env{'user.priv.cc./'.$cdom.'/'.$cnum.'./'.$cdom.'/'.$cnum.'/'.$group};
1595: }
1596: $newgroups{'/'.$cdom.'/'.$cnum} = \%group_privs;
1597: my $area = '/'.$cdom.'/'.$cnum;
1598: my $spec = $role.'.'.$area;
1599: if ($usec ne '') {
1600: $spec .= '/'.$usec;
1601: $area .= '/'.$usec;
1602: }
1603: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1604: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,\%newgroups);
1605: my $adhocstart = $refresh-1;
1606: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1607: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1608: }
1609: }
1610: }
1611: return;
1612: }
1613:
1614: sub check_forcc {
1615: my ($cdom,$cnum,$refresh,$then,$crstype) = @_;
1616: my ($is_cc,$ccrole);
1617: if ($crstype eq 'Community') {
1618: $ccrole = 'co';
1619: } else {
1620: $ccrole = 'cc';
1621: }
1622: if ($cdom ne '' && $cnum ne '') {
1623: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1624: my $envkey = 'user.role.'.$ccrole.'./'.$cdom.'/'.$cnum;
1625: if (defined($env{$envkey})) {
1626: $is_cc = 1;
1627: my ($tstart,$tend)=split(/\./,$env{$envkey});
1628: if ($tstart && $tstart>$refresh) { $is_cc = 0; }
1629: if ($tend && $tend <$then) { $is_cc = 0; }
1630: }
1631: }
1632: }
1633: return $is_cc;
1634: }
1635:
1636: sub courselink {
1637: my ($dcdom,$rowtype) = @_;
1638: my $courseform=&Apache::loncommon::selectcourse_link
1639: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1640: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1641: $dcdom,$dcdom,undef,'Course/Community');
1642: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1643: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1644: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1645: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1646: return $courseform.$hiddenitems;
1647: }
1648:
1649: sub coursepick_jscript {
1650: my %lt = &Apache::lonlocal::texthash(
1651: 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.",
1652: youc => 'You can only use this screen to select courses and communities in the current domain.',
1653: );
1654: my $verify_script = <<"END";
1655: <script type="text/javascript">
1656: // <![CDATA[
1657: function verifyCoursePick(caller) {
1658: var numbutton = getIndex(caller)
1659: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1660: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1661: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1662: if (pickedCourse != '') {
1663: if (numbutton != -1) {
1664: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1665: document.rolechoice.elements[numbutton+1].name = courseTarget
1666: document.rolechoice.submit()
1667: }
1668: }
1669: else {
1670: alert("$lt{'plsu'}");
1671: }
1672: }
1673: else {
1674: alert("$lt{'youc'}")
1675: }
1676: }
1677: function getIndex(caller) {
1678: for (var i=0;i<document.rolechoice.elements.length;i++) {
1679: if (document.rolechoice.elements[i] == caller) {
1680: return i;
1681: }
1682: }
1683: return -1;
1684: }
1685: // ]]>
1686: </script>
1687: END
1688: return $verify_script;
1689: }
1690:
1691: sub coauthorlink {
1692: my ($dcdom,$rowtype) = @_;
1693: my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
1694: my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
1695: return $coauthorform.$hiddenitems;
1696: }
1697:
1698: sub display_cc_role {
1699: my $rolekey = shift;
1700: my ($roletext,$roletext_end);
1701: my $advanced = $env{'user.adv'};
1702: my $tryagain = $env{'form.tryagain'};
1703: unless ($rolekey =~/^error\:/) {
1704: if ($rolekey =~ m{^user\.role\.(cc|co)\./($match_domain)/($match_courseid)$}) {
1705: my $ccrole = $1;
1706: my $tcourseid = $2.'_'.$3;
1707: my $trolecode = $1.'./'.$2.'/'.$3;
1708: my $twhere;
1709: my $ttype;
1710: my $tbg='LC_roles_is';
1711: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1712: if (%newhash) {
1713: $twhere=$newhash{'description'}.
1714: ' <span style="LC_fontsize_small">'.
1715: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1).
1716: '</span>';
1717: $ttype = $newhash{'type'};
1718: } else {
1719: $twhere=&mt('Currently not available');
1720: $env{'course.'.$tcourseid.'.description'}=$twhere;
1721: }
1722: my $trole = &Apache::lonnet::plaintext($ccrole,$ttype);
1723: $twhere.="<br />".&mt('Domain').":".$1;
1724: ($roletext,$roletext_end) = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$trole,$twhere,'','','',1,'');
1725: }
1726: }
1727: return ($roletext,$roletext_end);
1728: }
1729:
1730: sub adhoc_roles_row {
1731: my ($dcdom,$rowtype) = @_;
1732: my $output = &Apache::loncommon::continue_data_table_row()
1733: .' <td colspan="5">'
1734: .&mt('[_1]Ad hoc[_2] roles in domain [_3] --'
1735: ,'<span class="LC_cusr_emph">','</span>',$dcdom)
1736: .' ';
1737: my $selectcclink = &courselink($dcdom,$rowtype);
1738: my $ccrole = &Apache::lonnet::plaintext('co',undef,undef,1);
1739: my $carole = &Apache::lonnet::plaintext('ca');
1740: my $selectcalink = &coauthorlink($dcdom,$rowtype);
1741: $output.=$ccrole.': '.$selectcclink
1742: .' | '.$carole.': '.$selectcalink
1743: .&Apache::loncommon::end_data_table_row();
1744: return $output;
1745: }
1746:
1747: sub recent_filename {
1748: my $area=shift;
1749: return 'nohist_recent_'.&escape($area);
1750: }
1751:
1752: sub courseloadpage {
1753: my ($courseid) = @_;
1754: my $startpage;
1755: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1756: [$courseid.':courseinit']);
1757: my ($tmp) = %entry_settings;
1758: unless ($tmp =~ /^error: 2 /) {
1759: $startpage = $entry_settings{$courseid.':courseinit'};
1760: }
1761: if ($startpage eq '') {
1762: if (exists($env{'environment.course_init_display'})) {
1763: $startpage = $env{'environment.course_init_display'};
1764: }
1765: }
1766: return $startpage;
1767: }
1768:
1769: 1;
1770: __END__
1771:
1772: =head1 NAME
1773:
1774: Apache::lonroles - User Roles Screen
1775:
1776: =head1 SYNOPSIS
1777:
1778: Invoked by /etc/httpd/conf/srm.conf:
1779:
1780: <Location /adm/roles>
1781: PerlAccessHandler Apache::lonacc
1782: SetHandler perl-script
1783: PerlHandler Apache::lonroles
1784: ErrorDocument 403 /adm/login
1785: ErrorDocument 500 /adm/errorhandler
1786: </Location>
1787:
1788: =head1 OVERVIEW
1789:
1790: =head2 Choosing Roles
1791:
1792: C<lonroles> is a handler that allows a user to switch roles in
1793: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1794: default role that a user has before selecting a role, as widely as
1795: possible, but certain handlers for example need specification which
1796: course they should act on, etc. Both in this scenario, and when the
1797: handler determines via C<lonnet>'s C<&allowed> function that a certain
1798: action is not allowed, C<lonroles> is used as error handler. This
1799: allows the user to select another role which may have permission to do
1800: what they were trying to do. C<lonroles> can also be accessed via the
1801: B<CRS> button in the Remote Control.
1802:
1803: =begin latex
1804:
1805: \begin{figure}
1806: \begin{center}
1807: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1808: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1809: \end{center}
1810: \end{figure}
1811:
1812: =end latex
1813:
1814: =head2 Role Initialization
1815:
1816: 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.
1817:
1818: =head1 INTRODUCTION
1819:
1820: This module enables a user to select what role he wishes to
1821: operate under (instructor, student, teaching assistant, course
1822: coordinator, etc). These roles are pre-established by the actions
1823: of upper-level users.
1824:
1825: This is part of the LearningOnline Network with CAPA project
1826: described at http://www.lon-capa.org.
1827:
1828: =head1 HANDLER SUBROUTINE
1829:
1830: This routine is called by Apache and mod_perl.
1831:
1832: =over 4
1833:
1834: =item *
1835:
1836: Roles Initialization (yes/no)
1837:
1838: =item *
1839:
1840: Get Error Message from Environment
1841:
1842: =item *
1843:
1844: Who is this?
1845:
1846: =item *
1847:
1848: Generate Page Output
1849:
1850: =item *
1851:
1852: Choice or no choice
1853:
1854: =item *
1855:
1856: Table
1857:
1858: =item *
1859:
1860: Privileges
1861:
1862: =back
1863:
1864: =cut
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