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[LON-CAPA] /
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lonroles.pm
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Mon Dec 15 16:37:53 2008 UTC (15 years, 8 months ago) by
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- $brcrum is a reference to an anonymous array [] (use $brcrum not @brcrum).
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1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.214 2008/12/15 16:37:53 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 GDBM_File;
142: use LONCAPA qw(:DEFAULT :match);
143: use HTML::Entities;
144:
145:
146: sub redirect_user {
147: my ($r,$title,$url,$msg,$launch_nav) = @_;
148: $msg = $title if (! defined($msg));
149: &Apache::loncommon::content_type($r,'text/html');
150: &Apache::loncommon::no_cache($r);
151: $r->send_http_header;
152: my $swinfo=&Apache::lonmenu::rawconfig();
153: my $navwindow;
154: if ($launch_nav eq 'on') {
155: $navwindow.=&Apache::lonnavdisplay::launch_win('now',undef,undef,
156: ($url =~ m-^/adm/whatsnew-));
157: } else {
158: $navwindow.=&Apache::lonnavmaps::close();
159: }
160: my $start_page = &Apache::loncommon::start_page('Switching Role',undef,
161: {'redirect' => [1,$url],});
162: my $end_page = &Apache::loncommon::end_page();
163:
164: # Note to style police:
165: # This must only replace the spaces, nothing else, or it bombs elsewhere.
166: $url=~s/ /\%20/g;
167: $r->print(<<ENDREDIR);
168: $start_page
169: <script type="text/javascript">
170: $swinfo
171: </script>
172: $navwindow
173: <h1>$msg</h1>
174: $end_page
175: ENDREDIR
176: return;
177: }
178:
179: sub error_page {
180: my ($r,$error,$dest)=@_;
181: &Apache::loncommon::content_type($r,'text/html');
182: &Apache::loncommon::no_cache($r);
183: $r->send_http_header;
184: return OK if $r->header_only;
185: $r->print(&Apache::loncommon::start_page('Problems during Course Initialization').
186: '<script type="text/javascript">'.
187: &Apache::lonmenu::rawconfig().'</script>'.
188: '<p>'.&mt('The following problems occurred:').
189: $error.
190: '</p><br /><a href="'.$dest.'">'.&mt('Continue').'</a>'.
191: &Apache::loncommon::end_page());
192: }
193:
194: sub handler {
195:
196: my $r = shift;
197:
198: my $now=time;
199: my $then=$env{'user.login.time'};
200: my $envkey;
201: my %dcroles = ();
202: my $numdc = &check_fordc(\%dcroles,$then);
203: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
204:
205: # ================================================================== Roles Init
206: if ($env{'form.selectrole'}) {
207:
208: my $locknum=&Apache::lonnet::get_locks();
209: if ($locknum) { return 409; }
210:
211: if ($env{'form.newrole'}) {
212: $env{'form.'.$env{'form.newrole'}}=1;
213: }
214: if ($env{'request.course.id'}) {
215: # Check if user is CC trying to select a course role
216: if ($env{'form.switchrole'}) {
217: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
218: &adhoc_course_role($then);
219: }
220: }
221: my %temp=('logout_'.$env{'request.course.id'} => time);
222: &Apache::lonnet::put('email_status',\%temp);
223: &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
224: }
225: &Apache::lonnet::appenv({"request.course.id" => '',
226: "request.course.fn" => '',
227: "request.course.uri" => '',
228: "request.course.sec" => '',
229: "request.role" => 'cm',
230: "request.role.adv" => $env{'user.adv'},
231: "request.role.domain" => $env{'user.domain'}});
232: # Check if user is a DC trying to enter a course or author space and needs privs to be created
233: if ($numdc > 0) {
234: foreach my $envkey (keys %env) {
235: # Is this an ad-hoc CC-role?
236: if (my ($domain,$coursenum) =
237: ($envkey =~ m-^form\.cc\./($match_domain)/($match_courseid)$-)) {
238: if ($dcroles{$domain}) {
239: &check_privs($domain,$coursenum,$then,$now,'cc');
240: }
241: last;
242: }
243: # Is this an ad-hoc CA-role?
244: if (my ($domain,$user) =
245: ($envkey =~ m-^form\.ca\./($match_domain)/($match_username)$-)) {
246: if (($domain eq $env{'user.domain'}) && ($user eq $env{'user.name'})) {
247: delete($env{$envkey});
248: $env{'form.au./'.$domain.'/'} = 1;
249: my ($server_status,$home) = &check_author_homeserver($user,$domain);
250: if ($server_status eq 'switchserver') {
251: my $trolecode = 'au./'.$domain.'/';
252: my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
253: $r->internal_redirect($switchserver);
254: }
255: last;
256: }
257: if (my ($castart,$caend) = ($env{'user.role.ca./'.$domain.'/'.$user} =~ /^(\d*)\.(\d*)$/)) {
258: if (((($castart) && ($castart < $now)) || !$castart) &&
259: ((!$caend) || (($caend) && ($caend > $now)))) {
260: my ($server_status,$home) = &check_author_homeserver($user,$domain);
261: if ($server_status eq 'switchserver') {
262: my $trolecode = 'ca./'.$domain.'/'.$user;
263: my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
264: $r->internal_redirect($switchserver);
265: }
266: last;
267: }
268: }
269: # Check if author blocked ca-access
270: my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],$domain,$user);
271: if ($blocked{'domcoord.author'} eq 'blocked') {
272: delete($env{$envkey});
273: $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
274: last;
275: }
276: if ($dcroles{$domain}) {
277: my ($server_status,$home) = &check_author_homeserver($user,$domain);
278: if (($server_status eq 'ok') || ($server_status eq 'switchserver')) {
279: &check_privs($domain,$user,$then,$now,'ca');
280: if ($server_status eq 'switchserver') {
281: my $trolecode = 'ca./'.$domain.'/'.$user;
282: my $switchserver = '/adm/switchserver?'
283: .'otherserver='.$home.'&role='.$trolecode;
284: $r->internal_redirect($switchserver);
285: }
286: } else {
287: delete($env{$envkey});
288: }
289: } else {
290: delete($env{$envkey});
291: }
292: last;
293: }
294: }
295: }
296:
297: foreach $envkey (keys %env) {
298: next if ($envkey!~/^user\.role\./);
299: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
300: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
301: if ($env{'form.'.$trolecode}) {
302: if ($tstatus eq 'is') {
303: $where=~s/^\///;
304: my ($cdom,$cnum,$csec)=split(/\//,$where);
305: # check for course groups
306: my %coursegroups = &Apache::lonnet::get_active_groups(
307: $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
308: my $cgrps = join(':',keys(%coursegroups));
309:
310: # store role if recent_role list being kept
311: if ($env{'environment.recentroles'}) {
312: my %frozen_roles =
313: &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
314: &Apache::lonhtmlcommon::store_recent('roles',
315: $trolecode,' ',$frozen_roles{$trolecode});
316: }
317:
318:
319: # check for keyed access
320: if (($role eq 'st') &&
321: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
322: # who is key authority?
323: my $authdom=$cdom;
324: my $authnum=$cnum;
325: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
326: ($authnum,$authdom)=
327: split(/:/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
328: }
329: # check with key authority
330: unless (&Apache::lonnet::validate_access_key(
331: $env{'environment.key.'.$cdom.'_'.$cnum},
332: $authdom,$authnum)) {
333: # there is no valid key
334: if ($env{'form.newkey'}) {
335: # student attempts to register a new key
336: &Apache::loncommon::content_type($r,'text/html');
337: &Apache::loncommon::no_cache($r);
338: $r->send_http_header;
339: my $swinfo=&Apache::lonmenu::rawconfig();
340: my $start_page=&Apache::loncommon::start_page
341: ('Verifying Access Key to Unlock this Course');
342: my $end_page=&Apache::loncommon::end_page();
343: my $buttontext=&mt('Enter Course');
344: my $message=&mt('Successfully registered key');
345: my $assignresult=
346: &Apache::lonnet::assign_access_key(
347: $env{'form.newkey'},
348: $authdom,$authnum,
349: $cdom,$cnum,
350: $env{'user.domain'},
351: $env{'user.name'},
352: &mt('Assigned from [_1] at [_2] for [_3]'
353: ,$ENV{'REMOTE_ADDR'}
354: ,&Apache::lonlocal::locallocaltime()
355: ,$trolecode)
356: );
357: unless ($assignresult eq 'ok') {
358: $assignresult=~s/^error\:\s*//;
359: $message=&mt($assignresult).
360: '<br /><a href="/adm/logout">'.
361: &mt('Logout').'</a>';
362: $buttontext=&mt('Re-Enter Key');
363: }
364: $r->print(<<ENDENTEREDKEY);
365: $start_page
366: <script type="text/javascript">
367: $swinfo
368: </script>
369: <form method="post">
370: <input type="hidden" name="selectrole" value="1" />
371: <input type="hidden" name="$trolecode" value="1" />
372: <span class="LC_fontsize_large">$message</span><br />
373: <input type="submit" value="$buttontext" />
374: </form>
375: $end_page
376: ENDENTEREDKEY
377: return OK;
378: } else {
379: # print form to enter a new key
380: &Apache::loncommon::content_type($r,'text/html');
381: &Apache::loncommon::no_cache($r);
382: $r->send_http_header;
383: my $swinfo=&Apache::lonmenu::rawconfig();
384: my $start_page=&Apache::loncommon::start_page
385: ('Enter Access Key to Unlock this Course');
386: my $end_page=&Apache::loncommon::end_page();
387: $r->print(<<ENDENTERKEY);
388: $start_page
389: <script type="text/javascript">
390: $swinfo
391: </script>
392: <form method="post">
393: <input type="hidden" name="selectrole" value="1" />
394: <input type="hidden" name="$trolecode" value="1" />
395: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
396: <input type="submit" value="Enter key" />
397: </form>
398: $end_page
399: ENDENTERKEY
400: return OK;
401: }
402: }
403: }
404: &Apache::lonnet::log($env{'user.domain'},
405: $env{'user.name'},
406: $env{'user.home'},
407: "Role ".$trolecode);
408:
409: &Apache::lonnet::appenv(
410: {'request.role' => $trolecode,
411: 'request.role.domain' => $cdom,
412: 'request.course.sec' => $csec,
413: 'request.course.groups' => $cgrps});
414: my $tadv=0;
415:
416: if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
417: my $msg;
418: my ($furl,$ferr)=
419: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
420: if (($env{'form.orgurl'}) &&
421: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
422: my $dest=$env{'form.orgurl'};
423: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
424: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
425: if (($ferr) && ($tadv)) {
426: &error_page($r,$ferr,$dest);
427: } else {
428: $r->internal_redirect($dest);
429: }
430: return OK;
431: } else {
432: if (!$env{'request.course.id'}) {
433: &Apache::lonnet::appenv(
434: {"request.course.id" => $cdom.'_'.$cnum});
435: $furl='/adm/roles?tryagain=1';
436: $msg=
437: '<h1><span class="LC_error">'.
438: &mt('Could not initialize [_1] at this time.',
439: $env{'course.'.$cdom.'_'.$cnum.'.description'}).
440: '</span></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
441: }
442: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
443: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
444:
445: if (($ferr) && ($tadv)) {
446: &error_page($r,$ferr,$furl);
447: } else {
448: # Check to see if the user is a CC entering a course
449: # for the first time
450: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
451: if (substr($courseid, 0, 1) eq '/') {
452: $courseid = substr($courseid, 1);
453: }
454: $courseid =~ s/\//_/;
455: if ($role eq 'cc' && $env{'course.' . $courseid .
456: '.course.helper.not.run'}) {
457: $furl = "/adm/helper/course.initialization.helper";
458: # Send the user to the course they selected
459: } elsif ($env{'request.course.id'}) {
460: if ($env{'form.destinationurl'}) {
461: my $dest = $env{'form.destinationurl'};
462: if ($env{'form.destsymb'} ne '') {
463: my $esc_symb = &HTML::Entities::encode($env{'form.destsymb'},'"<>&');
464: $dest .= '?symb='.$esc_symb;
465: }
466: &redirect_user($r,&mt('Entering [_1]',
467: $env{'course.'.$courseid.'.description'}),
468: $dest,$msg,
469: $env{'environment.remotenavmap'});
470: return OK;
471: }
472: if (&Apache::lonnet::allowed('whn',
473: $env{'request.course.id'})
474: || &Apache::lonnet::allowed('whn',
475: $env{'request.course.id'}.'/'
476: .$env{'request.course.sec'})
477: ) {
478: my $startpage = &courseloadpage($courseid);
479: unless ($startpage eq 'firstres') {
480: $msg = &mt('Entering [_1] ...',
481: $env{'course.'.$courseid.'.description'});
482: &redirect_user($r,&mt('New in course'),
483: '/adm/whatsnew?refpage=start',$msg,
484: $env{'environment.remotenavmap'});
485: return OK;
486: }
487: }
488: }
489: # Are we allowed to look at the first resource?
490: if ($furl !~ m|^/adm/|) {
491: # Guess not ...
492: $furl=&Apache::lonpageflip::first_accessible_resource();
493: }
494: $msg = &mt('Entering [_1] ...',
495: $env{'course.'.$courseid.'.description'});
496: &redirect_user($r,&mt('Entering [_1]',
497: $env{'course.'.$courseid.'.description'}),
498: $furl,$msg,
499: $env{'environment.remotenavmap'});
500: }
501: return OK;
502: }
503: }
504: #
505: # Send the user to the construction space they selected
506: if ($role =~ /^(au|ca|aa)$/) {
507: my $redirect_url = '/priv/';
508: if ($role eq 'au') {
509: $redirect_url.=$env{'user.name'};
510: } else {
511: $where =~ /\/(.*)$/;
512: $redirect_url .= $1;
513: }
514: $redirect_url .= '/';
515: &redirect_user($r,&mt('Entering Construction Space'),
516: $redirect_url);
517: return OK;
518: }
519: if ($role eq 'dc') {
520: my $redirect_url = '/adm/menu/';
521: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
522: $redirect_url);
523: return OK;
524: }
525: }
526: }
527: }
528: }
529:
530:
531: # =============================================================== No Roles Init
532:
533: &Apache::loncommon::content_type($r,'text/html');
534: &Apache::loncommon::no_cache($r);
535: $r->send_http_header;
536: return OK if $r->header_only;
537:
538: my $brcrum =[{href=>"/admm/roles",text=>"User Roles"}];
539: my $swinfo=&Apache::lonmenu::rawconfig();
540: my $start_page=&Apache::loncommon::start_page('User Roles',undef,{bread_crumbs=>$brcrum});
541: my $standby=&mt('Role selected. Please stand by.');
542: $standby=~s/\n/\\n/g;
543: 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 />';
544:
545: $r->print(<<ENDHEADER);
546: $start_page
547: <br />
548: <noscript>
549: $noscript
550: </noscript>
551: <script type="text/javascript">
552: $swinfo
553: window.focus();
554:
555: active=true;
556:
557: function enterrole (thisform,rolecode,buttonname) {
558: if (active) {
559: active=false;
560: document.title='$standby';
561: window.status='$standby';
562: thisform.newrole.value=rolecode;
563: thisform.submit();
564: } else {
565: alert('$standby');
566: }
567: }
568: </script>
569: ENDHEADER
570:
571: # ------------------------------------------ Get Error Message from Environment
572:
573: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
574: if ($env{'user.error.msg'}) {
575: $r->log_reason(
576: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
577: }
578:
579: # ------------------------------------------------- Can this user re-init, etc?
580:
581: my $advanced=$env{'user.adv'};
582: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
583: my $tryagain=$env{'form.tryagain'};
584: my $reinit=$env{'user.reinit'};
585: delete $env{'user.reinit'};
586:
587: # -------------------------------------------------------- Generate Page Output
588: # --------------------------------------------------------------- Error Header?
589: if ($error) {
590: $r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
591: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
592: if ($priv ne '') {
593: $r->print(&mt('Access : ').&Apache::lonnet::plaintext($priv)."\n");
594: }
595: if ($fn ne '') {
596: $r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
597: }
598: if ($msg ne '') {
599: $r->print(&mt('Action : ').$msg."\n");
600: }
601: $r->print("</pre><hr />");
602: my $url=$fn;
603: my $last;
604: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
605: &GDBM_READER(),0640)) {
606: $last=$hash{'last_known'};
607: untie(%hash);
608: }
609: if ($last) { $fn.='?symb='.&escape($last); }
610:
611: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
612: &Apache::lonenc::check_encrypt($fn));
613: } else {
614: if ($env{'user.error.msg'}) {
615: if ($reinit) {
616: $r->print(
617: '<h3><span class="LC_error">'.
618: &mt('As your session file for the course has expired, you will need to re-select the course.').'</span></h3>');
619: } else {
620: $r->print(
621: '<h3><span class="LC_error">'.
622: &mt('You need to choose another user role or enter a specific course for this function').'</span></h3>');
623: }
624: }
625: }
626: # -------------------------------------------------------- Choice or no choice?
627: if ($nochoose) {
628: $r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
629: &mt('This action is currently not authorized.').'</span>'.
630: &Apache::loncommon::end_page());
631: return OK;
632: } else {
633: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
634: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
635: }
636: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
637: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
638: $r->print('<input type="hidden" name="selectrole" value="1" />');
639: $r->print('<input type="hidden" name="newrole" value="" />');
640: }
641: my (%roletext,%sortrole,%roleclass);
642: my $countactive=0;
643: my $countfuture=0;
644: my $countwill=0;
645: my $inrole=0;
646: my $possiblerole='';
647: my %futureroles;
648: my %roles_nextlogin;
649: foreach $envkey (sort keys %env) {
650: my $button = 1;
651: my $switchserver='';
652: my $roletext;
653: my $sortkey;
654: if ($envkey=~/^user\.role\./) {
655: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
656: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
657: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
658: $tremark='';
659: $tpstart=' ';
660: $tpend=' ';
661: if ($tstart) {
662: $tpstart=&Apache::lonlocal::locallocaltime($tstart);
663: }
664: if ($tend) {
665: $tpend=&Apache::lonlocal::locallocaltime($tend);
666: }
667: if ($env{'request.role'} eq $trolecode) {
668: $tstatus='selected';
669: }
670: my $tbg;
671: if (($tstatus eq 'is')
672: || ($tstatus eq 'selected')
673: || ($tstatus eq 'will')
674: || ($tstatus eq 'future')
675: || ($env{'form.showall'})) {
676: if ($tstatus eq 'is') {
677: $tbg='LC_roles_is';
678: $possiblerole=$trolecode;
679: $countactive++;
680: } elsif ($tstatus eq 'future') {
681: $tbg='LC_roles_future';
682: $button=0;
683: $futureroles{$trolecode} = $tstart.':'.$tend;
684: $countfuture ++;
685: } elsif ($tstatus eq 'will') {
686: $tbg='LC_roles_will';
687: $tremark.=&mt('Active at next login.').' ';
688: $roles_nextlogin{$trolecode} = $tstart.':'.$tend;
689: $countwill ++;
690: } elsif ($tstatus eq 'expired') {
691: $tbg='LC_roles_expired';
692: $button=0;
693: } elsif ($tstatus eq 'will_not') {
694: $tbg='LC_roles_will_not';
695: $tremark.=&mt('Expired after logout.').' ';
696: } elsif ($tstatus eq 'selected') {
697: $tbg='LC_roles_selected';
698: $inrole=1;
699: $countactive++;
700: $tremark.=&mt('Currently selected.').' ';
701: }
702: my $trole;
703: if ($role =~ /^cr\//) {
704: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
705: if ($tremark) { $tremark.='<br />'; }
706: $tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
707: }
708: $trole=Apache::lonnet::plaintext($role);
709: my $ttype;
710: my $twhere;
711: my ($tdom,$trest,$tsection)=
712: split(/\//,Apache::lonnet::declutter($where));
713: # First, Co-Authorship roles
714: if (($role eq 'ca') || ($role eq 'aa')) {
715: my $home = &Apache::lonnet::homeserver($trest,$tdom);
716: my $allowed=0;
717: my @ids=&Apache::lonnet::current_machine_ids();
718: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
719: if (!$allowed) {
720: $button=0;
721: $switchserver='otherserver='.$home.'&role='.$trolecode;
722: }
723: #next if ($home eq 'no_host');
724: $home = &Apache::lonnet::hostname($home);
725: $ttype='Construction Space';
726: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
727: ': '.$tdom.'<br />'.
728: ' '.&mt('Server').': '.$home;
729: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
730: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
731: $sortkey=$role."$trest:$tdom";
732: } elsif ($role eq 'au') {
733: # Authors
734: my $home = &Apache::lonnet::homeserver
735: ($env{'user.name'},$env{'user.domain'});
736: my $allowed=0;
737: my @ids=&Apache::lonnet::current_machine_ids();
738: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
739: if (!$allowed) {
740: $button=0;
741: $switchserver='otherserver='.$home.'&role='.$trolecode;
742: }
743: #next if ($home eq 'no_host');
744: $home = &Apache::lonnet::hostname($home);
745: $ttype='Construction Space';
746: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
747: ': '.$home;
748: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
749: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
750: $sortkey=$role;
751: } elsif ($trest) {
752: my $tcourseid=$tdom.'_'.$trest;
753: $ttype = &Apache::loncommon::course_type($tcourseid);
754: $trole = &Apache::lonnet::plaintext($role,$ttype);
755: if ($env{'course.'.$tcourseid.'.description'}) {
756: $twhere=$env{'course.'.$tcourseid.'.description'};
757: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
758: unless ($twhere eq &mt('Currently not available')) {
759: $twhere.=' <span class="LC_fontsize_small">'.
760: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
761: '</span>';
762: }
763: } else {
764: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
765: if (%newhash) {
766: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
767: "\0".$envkey;
768: $twhere=$newhash{'description'}.
769: ' <span class="LC_fontsize_small">'.
770: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
771: '</span>';
772: $ttype = $newhash{'type'};
773: $trole = &Apache::lonnet::plaintext($role,$ttype);
774: } else {
775: $twhere=&mt('Currently not available');
776: $env{'course.'.$tcourseid.'.description'}=$twhere;
777: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
778: $ttype = 'Unavailable';
779: }
780: }
781: if ($tsection) {
782: $twhere.='<br />'.&mt('Section').': '.$tsection;
783: }
784: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
785: } elsif ($tdom) {
786: $ttype='Domain';
787: $twhere=$tdom;
788: $sortkey=$role.$twhere;
789: } else {
790: $ttype='System';
791: $twhere=&mt('system wide');
792: $sortkey=$role.$twhere;
793: }
794: $roletext.=&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit);
795: $roletext{$envkey}=$roletext;
796: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
797: $sortrole{$sortkey}=$envkey;
798: $roleclass{$envkey}=$ttype;
799: }
800: }
801: }
802: if ($env{'user.adv'}) {
803: $r->print(
804: '<p><label>'.&mt('Show all roles').': <input type="checkbox" name="showall"');
805: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
806: $r->print(' /></label><input type="submit" value="'.&mt('Display').'" /></p>');
807: } else {
808: if ($countactive > 0) {
809: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
810: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
811: $r->print('<p>'.&mt('[_1]Visit the [_2]Course Catalog[_3] to view all [_4] LON-CAPA courses.','<b>','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a></b>',$domdesc).'<br />'.&mt('If a course is [_1]not[_2] in your list of current courses below, you may be able to enroll if self-enrollment is permitted.','<b>','</b>').'</p>');
812: }
813: }
814:
815: # No active roles
816: if ($countactive==0) {
817: if ($inrole) {
818: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
819: } else {
820: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
821: }
822: &findcourse_advice($r);
823: $r->print('</form>');
824: if ($countfuture) {
825: $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
826: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
827: $nochoose);
828: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
829: \%roletext);
830: my $tremark='';
831: my $tbg;
832: if ($env{'request.role'} eq 'cm') {
833: $tbg="LC_roles_selected";
834: $tremark=&mt('Currently selected.').' ';
835: } else {
836: $tbg="LC_roles_is";
837: }
838: $r->print(&Apache::loncommon::start_data_table_row()
839: .'<td class="'.$tbg.'"> </td>'
840: .'<td colspan="3">'
841: .&mt('No role specified')
842: .'</td>'
843: .'<td>'.$tremark.' </td>'
844: .&Apache::loncommon::end_data_table_row()
845: );
846:
847: $r->print(&Apache::loncommon::end_data_table());
848: }
849: $r->print(&Apache::loncommon::end_page());
850: return OK;
851: }
852: # ----------------------------------------------------------------------- Table
853: unless ((!&Apache::lonmenu::show_course()) || ($nochoose) || ($countactive==1)) {
854: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
855: }
856: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
857: if ($env{'environment.recentroles'}) {
858: my %recent_roles =
859: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
860: my $output='';
861: foreach (sort(keys(%recent_roles))) {
862: if (defined($roletext{'user.role.'.$_})) {
863: $output.=$roletext{'user.role.'.$_};
864: if ($_ =~ m-dc\./($match_domain)/-
865: && $dcroles{$1}) {
866: $output .= &adhoc_roles_row($1,'recent');
867: }
868: } elsif ($numdc > 0) {
869: unless ($_ =~/^error\:/) {
870: $output.=&display_cc_role('user.role.'.$_);
871: }
872: }
873: }
874: if ($output) {
875: $r->print(&Apache::loncommon::start_data_table_empty_row()
876: .'<td align="center" colspan="5">'
877: .&mt('Recent Roles')
878: .'</td>'
879: .&Apache::loncommon::end_data_table_empty_row()
880: );
881: $r->print($output);
882: $doheaders ++;
883: }
884: }
885:
886: if ($numdc > 0) {
887: $r->print(&coursepick_jscript());
888: $r->print(&Apache::loncommon::coursebrowser_javascript().
889: &Apache::loncommon::authorbrowser_javascript());
890: }
891: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
892: if ($countactive > 1) {
893: my $tremark='';
894: my $tbg;
895: if ($env{'request.role'} eq 'cm') {
896: $tbg="LC_roles_selected";
897: $tremark=&mt('Currently selected.').' ';
898: } else {
899: $tbg="LC_roles_is";
900: }
901: $r->print(&Apache::loncommon::start_data_table_row());
902: unless ($nochoose) {
903: if ($env{'request.role'} ne 'cm') {
904: $r->print('<td class="'.$tbg.'"><input type="submit" value="'.
905: &mt('Select').'" name="cm" /></td>');
906: } else {
907: $r->print('<td class="'.$tbg.'"> </td>');
908: }
909: }
910: $r->print('<td colspan="3">'
911: .&mt('No role specified')
912: .'</td>'
913: .'<td>'.$tremark.' </td>'
914: .&Apache::loncommon::end_data_table_row()
915: );
916: }
917: $r->print(&Apache::loncommon::end_data_table());
918: unless ($nochoose) {
919: $r->print("</form>\n");
920: }
921: # ------------------------------------------------------------ Privileges Info
922: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
923: $r->print('<hr /><h2>'.&mt('Current Privileges').'</h2>');
924: $r->print(&privileges_info());
925: }
926: $r->print(&Apache::lonnet::getannounce());
927: if ($advanced) {
928: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
929: $r->print('<p><small><i>'
930: .&mt('This is LON-CAPA [_1]',$r->dir_config('lonVersion'))
931: .'</i><br />'
932: .'<a href="/adm/logout">'.&mt('Logout').'</a> '
933: .'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
934: .&mt('Course Catalog')
935: .'</small></p>');
936: }
937: $r->print(&Apache::loncommon::end_page());
938: return OK;
939: }
940:
941: sub roletable_headers {
942: my ($r,$roleclass,$sortrole,$nochoose) = @_;
943: my $doheaders;
944: if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
945: $r->print('<br />'
946: .&Apache::loncommon::start_data_table()
947: .&Apache::loncommon::start_data_table_header_row()
948: );
949: if (!$nochoose) { $r->print('<th> </th>'); }
950: $r->print('<th>'.&mt('User Role').'</th>'
951: .'<th>'.&mt('Extent').'</th>'
952: .'<th>'.&mt('Start').'</th>'
953: .'<th>'.&mt('End').'</th>'
954: .&Apache::loncommon::end_data_table_header_row()
955: );
956: $doheaders=-1;
957: my @roletypes = &roletypes();
958: foreach my $type (@roletypes) {
959: my $haverole=0;
960: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
961: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
962: $haverole=1;
963: }
964: }
965: if ($haverole) { $doheaders++; }
966: }
967: }
968: return $doheaders;
969: }
970:
971: sub roletypes {
972: my @types = ('Domain','Construction Space','Course','Unavailable','System');
973: return @types;
974: }
975:
976: sub print_rolerows {
977: my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
978: if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
979: my @types = &roletypes();
980: foreach my $type (@types) {
981: my $output;
982: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
983: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
984: if (ref($roletext) eq 'HASH') {
985: $output.=$roletext->{$sortrole->{$which}};
986: if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
987: if (ref($dcroles) eq 'HASH') {
988: if ($dcroles->{$1}) {
989: $output .= &adhoc_roles_row($1,'');
990: }
991: }
992: }
993: }
994: }
995: }
996: if ($output) {
997: if ($doheaders > 0) {
998: $r->print(&Apache::loncommon::start_data_table_empty_row()
999: .'<td align="center" colspan="5">'
1000: .&mt($type)
1001: .'</td>'
1002: .&Apache::loncommon::end_data_table_empty_row()
1003: );
1004: }
1005: $r->print($output);
1006: }
1007: }
1008: }
1009: }
1010:
1011: sub findcourse_advice {
1012: my ($r) = @_;
1013: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1014: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1015: if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
1016: $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
1017: <ul>
1018: <li>'.&mt('The course has yet to be created.').'</li>
1019: <li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
1020: <li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
1021: <li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
1022: <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>
1023: </ul>');
1024: } else {
1025: $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 />');
1026: }
1027: $r->print('<p>'.&mt('The [_1]Course Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created.','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a>',$domdesc).'<br />');
1028: $r->print(&mt('You can search the course catalog for courses which permit self-enrollment, if you would like to enroll in a course.').'</p>');
1029: return;
1030: }
1031:
1032: sub privileges_info {
1033: my ($which) = @_;
1034: my $output;
1035:
1036: $which ||= $env{'request.role'};
1037:
1038: foreach my $envkey (sort(keys(%env))) {
1039: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
1040:
1041: my $where=$1;
1042: my $ttype;
1043: my $twhere;
1044: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
1045: if ($trest) {
1046: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
1047: $ttype='Construction Space';
1048: $twhere='User: '.$trest.', Domain: '.$tdom;
1049: } else {
1050: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
1051: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
1052: if ($tsec) {
1053: my $sec_type = 'Section';
1054: if (exists($env{"user.role.gr.$where"})) {
1055: $sec_type = 'Group';
1056: }
1057: $twhere.=' ('.$sec_type.': '.$tsec.')';
1058: }
1059: }
1060: } elsif ($tdom) {
1061: $ttype='Domain';
1062: $twhere=$tdom;
1063: } else {
1064: $ttype='System';
1065: $twhere='/';
1066: }
1067: $output .= "\n<h3>".&mt($ttype).': '.$twhere.'</h3>'."\n<ul>";
1068: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
1069: next if (!$priv);
1070:
1071: my ($prv,$restr)=split(/\&/,$priv);
1072: my $trestr='';
1073: if ($restr ne 'F') {
1074: $trestr.=' ('.
1075: join(', ',
1076: map { &Apache::lonnet::plaintext($_) }
1077: (split('',$restr))).') ';
1078: }
1079: $output .= "\n\t".
1080: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
1081: }
1082: $output .= "\n".'</ul>';
1083: }
1084: return $output;
1085: }
1086:
1087: sub role_status {
1088: my ($rolekey,$then,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
1089: my @pwhere = ();
1090: if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
1091: (undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
1092: unless (!defined($$role) || $$role eq '') {
1093: $$where=join('.',@pwhere);
1094: $$trolecode=$$role.'.'.$$where;
1095: ($$tstart,$$tend)=split(/\./,$env{$rolekey});
1096: $$tstatus='is';
1097: if ($$tstart && $$tstart>$then) {
1098: $$tstatus='future';
1099: if ($$tstart<$now) { $$tstatus='will'; }
1100: }
1101: if ($$tend) {
1102: if ($$tend<$then) {
1103: $$tstatus='expired';
1104: } elsif ($$tend<$now) {
1105: $$tstatus='will_not';
1106: }
1107: }
1108: }
1109: }
1110: }
1111:
1112: sub build_roletext {
1113: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit) = @_;
1114: my $roletext=&Apache::loncommon::start_data_table_row();
1115: my $is_dc=($trolecode =~ m/^dc\./);
1116: my $rowspan=($is_dc) ? ''
1117: : ' rowspan="2" ';
1118:
1119: unless ($nochoose) {
1120: my $buttonname=$trolecode;
1121: $buttonname=~s/\W//g;
1122: if (!$button) {
1123: if ($switchserver) {
1124: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'
1125: .'<a href="/adm/switchserver?'.$switchserver.'">'
1126: .&mt('Switch Server')
1127: .'</a></td>';
1128: } else {
1129: $roletext.=('<td'.$rowspan.' class="'.$tbg.'"> </td>');
1130: }
1131: } elsif ($tstatus eq 'is') {
1132: $roletext.='<td'.$rowspan.' class="'.$tbg.'">'.
1133: '<input name="'.$buttonname.'" type="button" value="'.
1134: &mt('Select').'" onClick="javascript:enterrole(this.form,\''.
1135: $trolecode."','".$buttonname.'\');" /></td>';
1136: } elsif ($tryagain) {
1137: $roletext.=
1138: '<td'.$rowspan.' class="'.$tbg.'">'.
1139: '<input name="'.$buttonname.'" type="button" value="'.
1140: &mt('Try Selecting Again').'" onClick="javascript:enterrole(this.form,\''.
1141: $trolecode."','".$buttonname.'\');" /></td>';
1142: } elsif ($advanced) {
1143: $roletext.=
1144: '<td'.$rowspan.' class="'.$tbg.'">'.
1145: '<input name="'.$buttonname.'" type="button" value="'.
1146: &mt('Re-Initialize').'" onClick="javascript:enterrole(this.form,\''.
1147: $trolecode."','".$buttonname.'\');" /></td>';
1148: } elsif ($reinit) {
1149: $roletext.=
1150: '<td'.$rowspan.' class="'.$tbg.'">'.
1151: '<input name="'.$buttonname.'" type="button" value="'.
1152: &mt('Re-Select').'" onClick="javascript:enterrole(this.form,\''.
1153: $trolecode."','".$buttonname.'\');" /></td>';
1154: } else {
1155: $roletext.=
1156: '<td'.$rowspan.' class="'.$tbg.'">'.
1157: '<input name="'.$buttonname.'" type="button" value="'.
1158: &mt('Re-Initialize').'" onClick="javascript:enterrole(this.form,\''.
1159: $trolecode."','".$buttonname.'\');" /></td>';
1160: }
1161: }
1162: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
1163: $tremark.=&Apache::lonannounce::showday(time,1,
1164: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
1165: }
1166: $roletext.='<td>'.$trole.'</td>'
1167: .'<td>'.$twhere.'</td>'
1168: .'<td>'.$tpstart.'</td>'
1169: .'<td>'.$tpend.'</td>'
1170: .&Apache::loncommon::end_data_table_row();
1171: if (!$is_dc) {
1172: $roletext.=&Apache::loncommon::continue_data_table_row()
1173: .'<td colspan="4">'
1174: .$tremark.' '
1175: .'</td>'
1176: .&Apache::loncommon::end_data_table_row();
1177: }
1178: return $roletext;
1179: }
1180:
1181: sub check_needs_switchserver {
1182: my ($possiblerole) = @_;
1183: my $needs_switchserver;
1184: my ($role,$where) = split(/\./,$possiblerole,2);
1185: my (undef,$tdom,$twho) = split(/\//,$where);
1186: my ($server_status,$home);
1187: if (($role eq 'ca') || ($role eq 'aa')) {
1188: ($server_status,$home) = &check_author_homeserver($twho,$tdom);
1189: } else {
1190: ($server_status,$home) = &check_author_homeserver($env{'user.name'},
1191: $env{'user.domain'});
1192: }
1193: if ($server_status eq 'switchserver') {
1194: $needs_switchserver = 1;
1195: }
1196: return $needs_switchserver;
1197: }
1198:
1199: sub check_author_homeserver {
1200: my ($uname,$udom)=@_;
1201: if (($uname eq '') || ($udom eq '')) {
1202: return ('fail','');
1203: }
1204: my $home = &Apache::lonnet::homeserver($uname,$udom);
1205: if (&Apache::lonnet::host_domain($home) ne $udom) {
1206: return ('fail',$home);
1207: }
1208: my @ids=&Apache::lonnet::current_machine_ids();
1209: if (grep(/^\Q$home\E$/,@ids)) {
1210: return ('ok',$home);
1211: } else {
1212: return ('switchserver',$home);
1213: }
1214: }
1215:
1216: sub check_privs {
1217: my ($cdom,$cnum,$then,$now,$checkrole) = @_;
1218: my $cckey = 'user.role.'.$checkrole.'./'.$cdom.'/'.$cnum;
1219: if ($env{$cckey}) {
1220: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
1221: &role_status($cckey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
1222: unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
1223: &set_privileges($cdom,$cnum,$checkrole);
1224: }
1225: } else {
1226: &set_privileges($cdom,$cnum,$checkrole);
1227: }
1228: }
1229:
1230: sub check_fordc {
1231: my ($dcroles,$then) = @_;
1232: my $numdc = 0;
1233: if ($env{'user.adv'}) {
1234: foreach my $envkey (sort keys %env) {
1235: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
1236: my $dcdom = $1;
1237: my $livedc = 1;
1238: my ($tstart,$tend)=split(/\./,$env{$envkey});
1239: if ($tstart && $tstart>$then) { $livedc = 0; }
1240: if ($tend && $tend <$then) { $livedc = 0; }
1241: if ($livedc) {
1242: $$dcroles{$dcdom} = $envkey;
1243: $numdc++;
1244: }
1245: }
1246: }
1247: }
1248: return $numdc;
1249: }
1250:
1251: sub adhoc_course_role {
1252: my ($then) = @_;
1253: my ($cdom,$cnum);
1254: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1255: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1256: if (&check_forcc($cdom,$cnum,$then)) {
1257: my $setprivs;
1258: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
1259: $setprivs = 1;
1260: } else {
1261: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
1262: if (($start && ($start>$then || $start == -1)) ||
1263: ($end && $end<$then)) {
1264: $setprivs = 1;
1265: }
1266: }
1267: if ($setprivs) {
1268: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
1269: my $role = $1;
1270: my $custom_role = $2;
1271: my $usec = $3;
1272: if ($role eq 'cr') {
1273: if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
1274: $role .= $custom_role;
1275: } else {
1276: return;
1277: }
1278: }
1279: my (%userroles,%newrole,%newgroups,%group_privs);
1280: my %cgroups =
1281: &Apache::lonnet::get_active_groups($env{'user.domain'},
1282: $env{'user.name'},$cdom,$cnum);
1283: foreach my $group (keys(%cgroups)) {
1284: $group_privs{$group} =
1285: $env{'user.priv.cc./'.$cdom.'/'.$cnum.'./'.$cdom.'/'.$cnum.'/'.$group};
1286: }
1287: $newgroups{'/'.$cdom.'/'.$cnum} = \%group_privs;
1288: my $area = '/'.$cdom.'/'.$cnum;
1289: my $spec = $role.'.'.$area;
1290: if ($usec ne '') {
1291: $spec .= '/'.$usec;
1292: $area .= '/'.$usec;
1293: }
1294: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1295: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,\%newgroups);
1296: my $adhocstart = $then-1;
1297: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1298: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1299: }
1300: }
1301: }
1302: return;
1303: }
1304:
1305: sub check_forcc {
1306: my ($cdom,$cnum,$then) = @_;
1307: my $is_cc;
1308: if ($cdom ne '' && $cnum ne '') {
1309: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1310: my $envkey = 'user.role.cc./'.$cdom.'/'.$cnum;
1311: if (defined($env{$envkey})) {
1312: $is_cc = 1;
1313: my ($tstart,$tend)=split(/\./,$env{$envkey});
1314: if ($tstart && $tstart>$then) { $is_cc = 0; }
1315: if ($tend && $tend <$then) { $is_cc = 0; }
1316: }
1317: }
1318: }
1319: return $is_cc;
1320: }
1321:
1322: sub courselink {
1323: my ($dcdom,$rowtype) = @_;
1324: my $courseform=&Apache::loncommon::selectcourse_link
1325: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1326: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1327: $dcdom,$dcdom,undef);
1328: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1329: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1330: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1331: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1332: return $courseform.$hiddenitems;
1333: }
1334:
1335: sub coursepick_jscript {
1336: my %lt = &Apache::lonlocal::texthash(
1337: plsu => "Please use the 'Select Course' link to open a separate pick course window where you may select the course you wish to enter.",
1338: youc => 'You can only use this screen to select courses in the current domain.',
1339: );
1340: my $verify_script = <<"END";
1341: <script type="text/javascript">
1342: function verifyCoursePick(caller) {
1343: var numbutton = getIndex(caller)
1344: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1345: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1346: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1347: if (pickedCourse != '') {
1348: if (numbutton != -1) {
1349: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1350: document.rolechoice.elements[numbutton+1].name = courseTarget
1351: document.rolechoice.submit()
1352: }
1353: }
1354: else {
1355: alert("$lt{'plsu'}");
1356: }
1357: }
1358: else {
1359: alert("$lt{'youc'}")
1360: }
1361: }
1362: function getIndex(caller) {
1363: for (var i=0;i<document.rolechoice.elements.length;i++) {
1364: if (document.rolechoice.elements[i] == caller) {
1365: return i;
1366: }
1367: }
1368: return -1;
1369: }
1370: </script>
1371: END
1372: return $verify_script;
1373: }
1374:
1375: sub coauthorlink {
1376: my ($dcdom,$rowtype) = @_;
1377: my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
1378: my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
1379: return $coauthorform.$hiddenitems;
1380: }
1381:
1382: sub display_cc_role {
1383: my $rolekey = shift;
1384: my $roletext;
1385: my $advanced = $env{'user.adv'};
1386: my $tryagain = $env{'form.tryagain'};
1387: unless ($rolekey =~/^error\:/) {
1388: if ($rolekey =~ m-^user\.role.cc\./($match_domain)/($match_courseid)$-) {
1389: my $tcourseid = $1.'_'.$2;
1390: my $trolecode = 'cc./'.$1.'/'.$2;
1391: my $twhere;
1392: my $ttype;
1393: my $tbg='LC_roles_is';
1394: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1395: if (%newhash) {
1396: $twhere=$newhash{'description'}.
1397: ' <span style="LC_fontsize_small">'.
1398: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1).
1399: '</span>';
1400: $ttype = $newhash{'type'};
1401: } else {
1402: $twhere=&mt('Currently not available');
1403: $env{'course.'.$tcourseid.'.description'}=$twhere;
1404: }
1405: my $trole = &Apache::lonnet::plaintext('cc',$ttype);
1406: $twhere.="<br />".&mt('Domain').":".$1;
1407: $roletext = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$trole,$twhere,'','','',1,'');
1408: }
1409: }
1410: return ($roletext);
1411: }
1412:
1413: sub adhoc_roles_row {
1414: my ($dcdom,$rowtype) = @_;
1415: my $output = &Apache::loncommon::continue_data_table_row()
1416: .' <td colspan="5">'
1417: .'<table><tr><td>'
1418: .&mt('[_1]Ad hoc[_2] roles in domain [_3] --'
1419: ,'<span class="LC_cusr_emph">','</span>',$dcdom)
1420: .'</td>'
1421: .'<td>';
1422: my $selectcclink = &courselink($dcdom,$rowtype);
1423: my $ccrole = &Apache::lonnet::plaintext('cc');
1424: my $carole = &Apache::lonnet::plaintext('ca');
1425: my $selectcalink = &coauthorlink($dcdom,$rowtype);
1426: $output.=&mt('[_1]: [_2]',$ccrole,$selectcclink)
1427: .'<br /></td>'
1428: .'<td> </td>'
1429: .'<td>'.&mt('[_1]: [_2]',$carole,$selectcalink).'<br /></td>'
1430: .'</tr></table>'
1431: .'</td>'
1432: .&Apache::loncommon::end_data_table_row();
1433: return $output;
1434: }
1435:
1436: sub recent_filename {
1437: my $area=shift;
1438: return 'nohist_recent_'.&escape($area);
1439: }
1440:
1441: sub set_privileges {
1442: # role can be cc or ca
1443: my ($dcdom,$pickedcourse,$role) = @_;
1444: my $area = '/'.$dcdom.'/'.$pickedcourse;
1445: my $spec = $role.'.'.$area;
1446: my %userroles = &Apache::lonnet::set_arearole($role,$area,'','',
1447: $env{'user.domain'},
1448: $env{'user.name'});
1449: my %ccrole = ();
1450: &Apache::lonnet::standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
1451: my ($author,$adv)= &Apache::lonnet::set_userprivs(\%userroles,\%ccrole);
1452: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1453:
1454: &Apache::lonnet::log($env{'user.domain'},
1455: $env{'user.name'},
1456: $env{'user.home'},
1457: "Role ".$role);
1458: &Apache::lonnet::appenv(
1459: {'request.role' => $spec,
1460: 'request.role.domain' => $dcdom,
1461: 'request.course.sec' => ''});
1462: my $tadv=0;
1463: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1464: &Apache::lonnet::appenv({'request.role.adv' => $tadv});
1465: }
1466:
1467: sub courseloadpage {
1468: my ($courseid) = @_;
1469: my $startpage;
1470: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1471: [$courseid.':courseinit']);
1472: my ($tmp) = %entry_settings;
1473: unless ($tmp =~ /^error: 2 /) {
1474: $startpage = $entry_settings{$courseid.':courseinit'};
1475: }
1476: if ($startpage eq '') {
1477: if (exists($env{'environment.course_init_display'})) {
1478: $startpage = $env{'environment.course_init_display'};
1479: }
1480: }
1481: return $startpage;
1482: }
1483:
1484: 1;
1485: __END__
1486:
1487: =head1 NAME
1488:
1489: Apache::lonroles - User Roles Screen
1490:
1491: =head1 SYNOPSIS
1492:
1493: Invoked by /etc/httpd/conf/srm.conf:
1494:
1495: <Location /adm/roles>
1496: PerlAccessHandler Apache::lonacc
1497: SetHandler perl-script
1498: PerlHandler Apache::lonroles
1499: ErrorDocument 403 /adm/login
1500: ErrorDocument 500 /adm/errorhandler
1501: </Location>
1502:
1503: =head1 OVERVIEW
1504:
1505: =head2 Choosing Roles
1506:
1507: C<lonroles> is a handler that allows a user to switch roles in
1508: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1509: default role that a user has before selecting a role, as widely as
1510: possible, but certain handlers for example need specification which
1511: course they should act on, etc. Both in this scenario, and when the
1512: handler determines via C<lonnet>'s C<&allowed> function that a certain
1513: action is not allowed, C<lonroles> is used as error handler. This
1514: allows the user to select another role which may have permission to do
1515: what they were trying to do. C<lonroles> can also be accessed via the
1516: B<CRS> button in the Remote Control.
1517:
1518: =begin latex
1519:
1520: \begin{figure}
1521: \begin{center}
1522: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1523: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1524: \end{center}
1525: \end{figure}
1526:
1527: =end latex
1528:
1529: =head2 Role Initialization
1530:
1531: 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.
1532:
1533: =head1 INTRODUCTION
1534:
1535: This module enables a user to select what role he wishes to
1536: operate under (instructor, student, teaching assistant, course
1537: coordinator, etc). These roles are pre-established by the actions
1538: of upper-level users.
1539:
1540: This is part of the LearningOnline Network with CAPA project
1541: described at http://www.lon-capa.org.
1542:
1543: =head1 HANDLER SUBROUTINE
1544:
1545: This routine is called by Apache and mod_perl.
1546:
1547: =over 4
1548:
1549: =item *
1550:
1551: Roles Initialization (yes/no)
1552:
1553: =item *
1554:
1555: Get Error Message from Environment
1556:
1557: =item *
1558:
1559: Who is this?
1560:
1561: =item *
1562:
1563: Generate Page Output
1564:
1565: =item *
1566:
1567: Choice or no choice
1568:
1569: =item *
1570:
1571: Table
1572:
1573: =item *
1574:
1575: Privileges
1576:
1577: =back
1578:
1579: =cut
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