Annotation of loncom/auth/lonroles.pm, revision 1.211
1.1 harris41 1: # The LearningOnline Network with CAPA
2: # User Roles Screen
1.31 www 3: #
1.211 ! tempelho 4: # $Id: lonroles.pm,v 1.210 2008/11/12 20:01:09 jms Exp $
1.31 www 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: #
1.32 harris41 28: ###
1.22 harris41 29:
1.210 jms 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:
1.1 harris41 127: package Apache::lonroles;
128:
129: use strict;
1.118 albertel 130: use Apache::lonnet;
1.7 www 131: use Apache::lonuserstate();
1.1 harris41 132: use Apache::Constants qw(:common);
1.2 www 133: use Apache::File();
1.26 www 134: use Apache::lonmenu;
1.29 albertel 135: use Apache::loncommon;
1.104 raeburn 136: use Apache::lonhtmlcommon;
1.57 www 137: use Apache::lonannounce;
1.72 www 138: use Apache::lonlocal;
1.151 www 139: use Apache::lonpageflip();
1.167 albertel 140: use Apache::lonnavdisplay();
1.120 albertel 141: use GDBM_File;
1.170 albertel 142: use LONCAPA qw(:DEFAULT :match);
1.201 raeburn 143: use HTML::Entities;
1.149 www 144:
1.1 harris41 145:
1.62 matthew 146: sub redirect_user {
1.95 albertel 147: my ($r,$title,$url,$msg,$launch_nav) = @_;
1.62 matthew 148: $msg = $title if (! defined($msg));
1.73 www 149: &Apache::loncommon::content_type($r,'text/html');
1.62 matthew 150: &Apache::loncommon::no_cache($r);
151: $r->send_http_header;
152: my $swinfo=&Apache::lonmenu::rawconfig();
1.96 albertel 153: my $navwindow;
1.95 albertel 154: if ($launch_nav eq 'on') {
1.166 albertel 155: $navwindow.=&Apache::lonnavdisplay::launch_win('now',undef,undef,
156: ($url =~ m-^/adm/whatsnew-));
1.96 albertel 157: } else {
158: $navwindow.=&Apache::lonnavmaps::close();
1.95 albertel 159: }
1.147 albertel 160: my $start_page = &Apache::loncommon::start_page('Switching Role',undef,
161: {'redirect' => [1,$url],});
162: my $end_page = &Apache::loncommon::end_page();
163:
1.92 www 164: # Note to style police:
165: # This must only replace the spaces, nothing else, or it bombs elsewhere.
166: $url=~s/ /\%20/g;
1.93 albertel 167: $r->print(<<ENDREDIR);
1.147 albertel 168: $start_page
1.96 albertel 169: <script type="text/javascript">
1.62 matthew 170: $swinfo
171: </script>
1.96 albertel 172: $navwindow
1.62 matthew 173: <h1>$msg</h1>
1.147 albertel 174: $end_page
1.62 matthew 175: ENDREDIR
176: return;
177: }
178:
1.150 www 179: sub error_page {
180: my ($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: $error.
1.156 albertel 190: '</p><br /><a href="'.$dest.'">'.&mt('Continue').'</a>'.
1.150 www 191: &Apache::loncommon::end_page());
192: }
193:
1.1 harris41 194: sub handler {
1.10 www 195:
1.1 harris41 196: my $r = shift;
197:
1.6 www 198: my $now=time;
1.118 albertel 199: my $then=$env{'user.login.time'};
1.6 www 200: my $envkey;
1.107 raeburn 201: my %dcroles = ();
202: my $numdc = &check_fordc(\%dcroles,$then);
1.148 albertel 203: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
1.10 www 204:
1.6 www 205: # ================================================================== Roles Init
1.118 albertel 206: if ($env{'form.selectrole'}) {
1.188 www 207:
208: my $locknum=&Apache::lonnet::get_locks();
209: if ($locknum) { return 409; }
210:
1.134 www 211: if ($env{'form.newrole'}) {
212: $env{'form.'.$env{'form.newrole'}}=1;
213: }
1.118 albertel 214: if ($env{'request.course.id'}) {
1.185 raeburn 215: # Check if user is CC trying to select a course role
216: if ($env{'form.switchrole'}) {
217: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
218: &adhoc_course_role($then);
219: }
220: }
1.118 albertel 221: my %temp=('logout_'.$env{'request.course.id'} => time);
1.33 www 222: &Apache::lonnet::put('email_status',\%temp);
1.118 albertel 223: &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
1.100 albertel 224: }
1.186 raeburn 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" => $env{'user.domain'}});
1.182 www 232: # Check if user is a DC trying to enter a course or author space and needs privs to be created
1.107 raeburn 233: if ($numdc > 0) {
1.118 albertel 234: foreach my $envkey (keys %env) {
1.182 www 235: # Is this an ad-hoc CC-role?
1.146 raeburn 236: if (my ($domain,$coursenum) =
1.171 albertel 237: ($envkey =~ m-^form\.cc\./($match_domain)/($match_courseid)$-)) {
1.146 raeburn 238: if ($dcroles{$domain}) {
1.182 www 239: &check_privs($domain,$coursenum,$then,$now,'cc');
240: }
241: last;
242: }
1.193 raeburn 243: # Is this an ad-hoc CA-role?
1.183 www 244: if (my ($domain,$user) =
245: ($envkey =~ m-^form\.ca\./($match_domain)/($match_username)$-)) {
1.206 raeburn 246: if (($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
1.190 www 270: my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],$domain,$user);
271: if ($blocked{'domcoord.author'} eq 'blocked') {
1.206 raeburn 272: delete($env{$envkey});
273: $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
274: last;
1.190 www 275: }
1.193 raeburn 276: if ($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: }
1.183 www 289: } else {
290: delete($env{$envkey});
1.182 www 291: }
292: last;
293: }
1.107 raeburn 294: }
295: }
296:
1.118 albertel 297: foreach $envkey (keys %env) {
1.40 matthew 298: next if ($envkey!~/^user\.role\./);
1.102 raeburn 299: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
300: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
1.118 albertel 301: if ($env{'form.'.$trolecode}) {
1.55 albertel 302: if ($tstatus eq 'is') {
303: $where=~s/^\///;
304: my ($cdom,$cnum,$csec)=split(/\//,$where);
1.137 raeburn 305: # check for course groups
306: my %coursegroups = &Apache::lonnet::get_active_groups(
307: $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
308: my $cgrps = join(':',keys(%coursegroups));
309:
1.111 albertel 310: # store role if recent_role list being kept
1.118 albertel 311: if ($env{'environment.recentroles'}) {
1.158 albertel 312: my %frozen_roles =
313: &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
1.111 albertel 314: &Apache::lonhtmlcommon::store_recent('roles',
1.158 albertel 315: $trolecode,' ',$frozen_roles{$trolecode});
1.111 albertel 316: }
317:
318:
1.53 www 319: # check for keyed access
1.55 albertel 320: if (($role eq 'st') &&
1.118 albertel 321: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
1.89 www 322: # who is key authority?
323: my $authdom=$cdom;
324: my $authnum=$cnum;
1.118 albertel 325: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
1.89 www 326: ($authnum,$authdom)=
1.172 albertel 327: split(/:/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
1.89 www 328: }
329: # check with key authority
330: unless (&Apache::lonnet::validate_access_key(
1.118 albertel 331: $env{'environment.key.'.$cdom.'_'.$cnum},
1.89 www 332: $authdom,$authnum)) {
1.53 www 333: # there is no valid key
1.118 albertel 334: if ($env{'form.newkey'}) {
1.53 www 335: # student attempts to register a new key
1.89 www 336: &Apache::loncommon::content_type($r,'text/html');
337: &Apache::loncommon::no_cache($r);
338: $r->send_http_header;
339: my $swinfo=&Apache::lonmenu::rawconfig();
1.147 albertel 340: my $start_page=&Apache::loncommon::start_page
1.89 www 341: ('Verifying Access Key to Unlock this Course');
1.147 albertel 342: my $end_page=&Apache::loncommon::end_page();
1.90 www 343: my $buttontext=&mt('Enter Course');
344: my $message=&mt('Successfully registered key');
345: my $assignresult=
346: &Apache::lonnet::assign_access_key(
1.118 albertel 347: $env{'form.newkey'},
1.90 www 348: $authdom,$authnum,
1.91 www 349: $cdom,$cnum,
1.118 albertel 350: $env{'user.domain'},
351: $env{'user.name'},
1.204 bisitz 352: &mt('Assigned from [_1] at [_2] for [_3]'
353: ,$ENV{'REMOTE_ADDR'}
354: ,&Apache::lonlocal::locallocaltime()
355: ,$trolecode)
356: );
1.90 www 357: unless ($assignresult eq 'ok') {
358: $assignresult=~s/^error\:\s*//;
359: $message=&mt($assignresult).
360: '<br /><a href="/adm/logout">'.
1.89 www 361: &mt('Logout').'</a>';
1.90 www 362: $buttontext=&mt('Re-Enter Key');
363: }
1.89 www 364: $r->print(<<ENDENTEREDKEY);
1.147 albertel 365: $start_page
1.179 raeburn 366: <script type="text/javascript">
1.89 www 367: $swinfo
368: </script>
369: <form method="post">
370: <input type="hidden" name="selectrole" value="1" />
371: <input type="hidden" name="$trolecode" value="1" />
1.211 ! tempelho 372: <span class="LC_fontsize_large">$message</span><br />
1.89 www 373: <input type="submit" value="$buttontext" />
374: </form>
1.147 albertel 375: $end_page
1.89 www 376: ENDENTEREDKEY
377: return OK;
1.55 albertel 378: } else {
1.53 www 379: # print form to enter a new key
1.73 www 380: &Apache::loncommon::content_type($r,'text/html');
1.55 albertel 381: &Apache::loncommon::no_cache($r);
382: $r->send_http_header;
383: my $swinfo=&Apache::lonmenu::rawconfig();
1.147 albertel 384: my $start_page=&Apache::loncommon::start_page
1.55 albertel 385: ('Enter Access Key to Unlock this Course');
1.147 albertel 386: my $end_page=&Apache::loncommon::end_page();
1.55 albertel 387: $r->print(<<ENDENTERKEY);
1.147 albertel 388: $start_page
1.179 raeburn 389: <script type="text/javascript">
1.53 www 390: $swinfo
391: </script>
392: <form method="post">
1.89 www 393: <input type="hidden" name="selectrole" value="1" />
394: <input type="hidden" name="$trolecode" value="1" />
1.118 albertel 395: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
1.53 www 396: <input type="submit" value="Enter key" />
397: </form>
1.147 albertel 398: $end_page
1.53 www 399: ENDENTERKEY
1.55 albertel 400: return OK;
401: }
402: }
403: }
1.118 albertel 404: &Apache::lonnet::log($env{'user.domain'},
405: $env{'user.name'},
406: $env{'user.home'},
1.87 www 407: "Role ".$trolecode);
1.101 albertel 408:
1.56 www 409: &Apache::lonnet::appenv(
1.186 raeburn 410: {'request.role' => $trolecode,
411: 'request.role.domain' => $cdom,
412: 'request.course.sec' => $csec,
413: 'request.course.groups' => $cgrps});
1.101 albertel 414: my $tadv=0;
1.62 matthew 415:
1.125 www 416: if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
1.152 raeburn 417: my $msg;
1.55 albertel 418: my ($furl,$ferr)=
419: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
1.118 albertel 420: if (($env{'form.orgurl'}) &&
421: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
422: my $dest=$env{'form.orgurl'};
1.117 albertel 423: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1.186 raeburn 424: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
1.150 www 425: if (($ferr) && ($tadv)) {
426: &error_page($r,$ferr,$dest);
427: } else {
428: $r->internal_redirect($dest);
429: }
1.55 albertel 430: return OK;
431: } else {
1.155 albertel 432: if (!$env{'request.course.id'}) {
1.55 albertel 433: &Apache::lonnet::appenv(
1.186 raeburn 434: {"request.course.id" => $cdom.'_'.$cnum});
1.61 www 435: $furl='/adm/roles?tryagain=1';
1.55 albertel 436: $msg=
1.157 albertel 437: '<h1><span class="LC_error">'.
1.162 albertel 438: &mt('Could not initialize [_1] at this time.',
439: $env{'course.'.$cdom.'_'.$cnum.'.description'}).
1.157 albertel 440: '</span></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
1.55 albertel 441: }
1.117 albertel 442: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1.186 raeburn 443: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
1.152 raeburn 444:
1.150 www 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'}) {
1.185 raeburn 460: if ($env{'form.destinationurl'}) {
461: my $dest = $env{'form.destinationurl'};
1.203 raeburn 462: if ($env{'form.destsymb'} ne '') {
463: my $esc_symb = &HTML::Entities::encode($env{'form.destsymb'},'"<>&');
464: $dest .= '?symb='.$esc_symb;
465: }
1.185 raeburn 466: &redirect_user($r,&mt('Entering [_1]',
467: $env{'course.'.$courseid.'.description'}),
468: $dest,$msg,
469: $env{'environment.remotenavmap'});
470: return OK;
471: }
1.150 www 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') {
1.204 bisitz 480: $msg = &mt('Entering [_1] ...',
1.162 albertel 481: $env{'course.'.$courseid.'.description'});
1.150 www 482: &redirect_user($r,&mt('New in course'),
483: '/adm/whatsnew?refpage=start',$msg,
484: $env{'environment.remotenavmap'});
485: return OK;
486: }
487: }
488: }
1.151 www 489: # Are we allowed to look at the first resource?
1.169 albertel 490: if ($furl !~ m|^/adm/|) {
1.151 www 491: # Guess not ...
492: $furl=&Apache::lonpageflip::first_accessible_resource();
493: }
1.162 albertel 494: $msg = &mt('Entering [_1] ...',
495: $env{'course.'.$courseid.'.description'});
496: &redirect_user($r,&mt('Entering [_1]',
497: $env{'course.'.$courseid.'.description'}),
1.150 www 498: $furl,$msg,
499: $env{'environment.remotenavmap'});
1.58 bowersj2 500: }
1.124 albertel 501: return OK;
1.55 albertel 502: }
503: }
1.62 matthew 504: #
505: # Send the user to the construction space they selected
1.125 www 506: if ($role =~ /^(au|ca|aa)$/) {
1.62 matthew 507: my $redirect_url = '/priv/';
508: if ($role eq 'au') {
1.118 albertel 509: $redirect_url.=$env{'user.name'};
1.62 matthew 510: } else {
511: $where =~ /\/(.*)$/;
512: $redirect_url .= $1;
513: }
514: $redirect_url .= '/';
1.78 sakharuk 515: &redirect_user($r,&mt('Entering Construction Space'),
1.62 matthew 516: $redirect_url);
517: return OK;
518: }
1.104 raeburn 519: if ($role eq 'dc') {
1.108 raeburn 520: my $redirect_url = '/adm/menu/';
521: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
1.104 raeburn 522: $redirect_url);
1.108 raeburn 523: return OK;
1.104 raeburn 524: }
1.55 albertel 525: }
526: }
1.6 www 527: }
1.40 matthew 528: }
1.44 www 529:
1.10 www 530:
1.6 www 531: # =============================================================== No Roles Init
1.10 www 532:
1.73 www 533: &Apache::loncommon::content_type($r,'text/html');
1.30 albertel 534: &Apache::loncommon::no_cache($r);
1.10 www 535: $r->send_http_header;
536: return OK if $r->header_only;
537:
1.52 www 538: my $swinfo=&Apache::lonmenu::rawconfig();
1.147 albertel 539: my $start_page=&Apache::loncommon::start_page('User Roles');
1.134 www 540: my $standby=&mt('Role selected. Please stand by.');
1.135 albertel 541: $standby=~s/\n/\\n/g;
1.184 raeburn 542: 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 />';
1.163 www 543:
1.10 www 544: $r->print(<<ENDHEADER);
1.147 albertel 545: $start_page
1.163 www 546: <br />
1.179 raeburn 547: <noscript>
548: $noscript
549: </noscript>
550: <script type="text/javascript">
1.26 www 551: $swinfo
552: window.focus();
1.134 www 553:
554: active=true;
555:
556: function enterrole (thisform,rolecode,buttonname) {
557: if (active) {
558: active=false;
559: document.title='$standby';
560: window.status='$standby';
561: thisform.newrole.value=rolecode;
562: thisform.submit();
563: } else {
564: alert('$standby');
565: }
566: }
1.26 www 567: </script>
1.10 www 568: ENDHEADER
1.6 www 569:
1.2 www 570: # ------------------------------------------ Get Error Message from Environment
571:
1.118 albertel 572: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
573: if ($env{'user.error.msg'}) {
1.55 albertel 574: $r->log_reason(
1.118 albertel 575: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
1.12 www 576: }
1.1 harris41 577:
1.61 www 578: # ------------------------------------------------- Can this user re-init, etc?
1.6 www 579:
1.118 albertel 580: my $advanced=$env{'user.adv'};
1.61 www 581: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
1.118 albertel 582: my $tryagain=$env{'form.tryagain'};
1.209 raeburn 583: my $reinit=$env{'user.reinit'};
584: delete $env{'user.reinit'};
1.6 www 585:
1.2 www 586: # -------------------------------------------------------- Generate Page Output
1.6 www 587: # --------------------------------------------------------------- Error Header?
1.2 www 588: if ($error) {
1.187 bisitz 589: $r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
1.174 albertel 590: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
591: if ($priv ne '') {
1.187 bisitz 592: $r->print(&mt('Access : ').&Apache::lonnet::plaintext($priv)."\n");
1.174 albertel 593: }
594: if ($fn ne '') {
1.187 bisitz 595: $r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
1.174 albertel 596: }
597: if ($msg ne '') {
1.187 bisitz 598: $r->print(&mt('Action : ').$msg."\n");
1.174 albertel 599: }
600: $r->print("</pre><hr />");
1.120 albertel 601: my $url=$fn;
602: my $last;
603: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
604: &GDBM_READER(),0640)) {
605: $last=$hash{'last_known'};
606: untie(%hash);
607: }
1.149 www 608: if ($last) { $fn.='?symb='.&escape($last); }
1.120 albertel 609:
610: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
611: &Apache::lonenc::check_encrypt($fn));
1.2 www 612: } else {
1.118 albertel 613: if ($env{'user.error.msg'}) {
1.209 raeburn 614: if ($reinit) {
615: $r->print(
616: '<h3><span class="LC_error">'.
617: &mt('As your session file for the course has expired, you will need to re-select the course.').'</span></h3>');
618: } else {
619: $r->print(
1.157 albertel 620: '<h3><span class="LC_error">'.
621: &mt('You need to choose another user role or enter a specific course for this function').'</span></h3>');
1.209 raeburn 622: }
623: }
1.2 www 624: }
1.6 www 625: # -------------------------------------------------------- Choice or no choice?
1.2 www 626: if ($nochoose) {
1.177 www 627: $r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
628: &mt('This action is currently not authorized.').'</span>'.
1.150 www 629: &Apache::loncommon::end_page());
630: return OK;
1.6 www 631: } else {
1.18 www 632: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
633: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
1.6 www 634: }
1.84 www 635: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
1.116 albertel 636: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
637: $r->print('<input type="hidden" name="selectrole" value="1" />');
1.134 www 638: $r->print('<input type="hidden" name="newrole" value="" />');
1.6 www 639: }
1.75 albertel 640: my (%roletext,%sortrole,%roleclass);
1.84 www 641: my $countactive=0;
1.191 raeburn 642: my $countfuture=0;
643: my $countwill=0;
1.84 www 644: my $inrole=0;
645: my $possiblerole='';
1.191 raeburn 646: my %futureroles;
647: my %roles_nextlogin;
1.118 albertel 648: foreach $envkey (sort keys %env) {
1.35 matthew 649: my $button = 1;
1.49 www 650: my $switchserver='';
1.75 albertel 651: my $roletext;
652: my $sortkey;
1.2 www 653: if ($envkey=~/^user\.role\./) {
1.102 raeburn 654: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
655: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
1.136 raeburn 656: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
1.102 raeburn 657: $tremark='';
658: $tpstart=' ';
659: $tpend=' ';
660: $tfont='#000000';
1.4 www 661: if ($tstart) {
1.74 www 662: $tpstart=&Apache::lonlocal::locallocaltime($tstart);
1.4 www 663: }
664: if ($tend) {
1.74 www 665: $tpend=&Apache::lonlocal::locallocaltime($tend);
1.4 www 666: }
1.118 albertel 667: if ($env{'request.role'} eq $trolecode) {
1.6 www 668: $tstatus='selected';
669: }
1.4 www 670: my $tbg;
1.164 albertel 671: if (($tstatus eq 'is')
672: || ($tstatus eq 'selected')
673: || ($tstatus eq 'will')
674: || ($tstatus eq 'future')
675: || ($env{'form.showall'})) {
1.35 matthew 676: if ($tstatus eq 'is') {
677: $tbg='#77FF77';
1.47 www 678: $tfont='#003300';
1.84 www 679: $possiblerole=$trolecode;
680: $countactive++;
1.35 matthew 681: } elsif ($tstatus eq 'future') {
682: $tbg='#FFFF77';
1.49 www 683: $button=0;
1.191 raeburn 684: $futureroles{$trolecode} = $tstart.':'.$tend;
685: $countfuture ++;
1.35 matthew 686: } elsif ($tstatus eq 'will') {
687: $tbg='#FFAA77';
1.204 bisitz 688: $tremark.=&mt('Active at next login.').' ';
1.191 raeburn 689: $roles_nextlogin{$trolecode} = $tstart.':'.$tend;
690: $countwill ++;
1.35 matthew 691: } elsif ($tstatus eq 'expired') {
692: $tbg='#FF7777';
1.47 www 693: $tfont='#330000';
1.49 www 694: $button=0;
1.35 matthew 695: } elsif ($tstatus eq 'will_not') {
696: $tbg='#AAFF77';
1.204 bisitz 697: $tremark.=&mt('Expired after logout.').' ';
1.35 matthew 698: } elsif ($tstatus eq 'selected') {
699: $tbg='#11CC55';
1.47 www 700: $tfont='#002200';
1.84 www 701: $inrole=1;
1.86 albertel 702: $countactive++;
1.204 bisitz 703: $tremark.=&mt('Currently selected.').' ';
1.35 matthew 704: }
705: my $trole;
706: if ($role =~ /^cr\//) {
707: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
1.132 albertel 708: if ($tremark) { $tremark.='<br />'; }
1.204 bisitz 709: $tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
1.159 albertel 710: }
711: $trole=Apache::lonnet::plaintext($role);
1.35 matthew 712: my $ttype;
713: my $twhere;
714: my ($tdom,$trest,$tsection)=
715: split(/\//,Apache::lonnet::declutter($where));
716: # First, Co-Authorship roles
1.125 www 717: if (($role eq 'ca') || ($role eq 'aa')) {
1.39 stredwic 718: my $home = &Apache::lonnet::homeserver($trest,$tdom);
1.83 albertel 719: my $allowed=0;
720: my @ids=&Apache::lonnet::current_machine_ids();
721: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
722: if (!$allowed) {
1.49 www 723: $button=0;
1.130 albertel 724: $switchserver='otherserver='.$home.'&role='.$trolecode;
1.49 www 725: }
1.35 matthew 726: #next if ($home eq 'no_host');
1.176 albertel 727: $home = &Apache::lonnet::hostname($home);
1.78 sakharuk 728: $ttype='Construction Space';
1.72 www 729: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
730: ': '.$tdom.'<br />'.
731: ' '.&mt('Server').': '.$home;
1.118 albertel 732: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1.82 www 733: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
1.75 albertel 734: $sortkey=$role."$trest:$tdom";
1.35 matthew 735: } elsif ($role eq 'au') {
736: # Authors
737: my $home = &Apache::lonnet::homeserver
1.118 albertel 738: ($env{'user.name'},$env{'user.domain'});
1.83 albertel 739: my $allowed=0;
740: my @ids=&Apache::lonnet::current_machine_ids();
741: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
742: if (!$allowed) {
1.49 www 743: $button=0;
1.143 albertel 744: $switchserver='otherserver='.$home.'&role='.$trolecode;
1.49 www 745: }
1.35 matthew 746: #next if ($home eq 'no_host');
1.176 albertel 747: $home = &Apache::lonnet::hostname($home);
1.78 sakharuk 748: $ttype='Construction Space';
1.72 www 749: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
750: ': '.$home;
1.118 albertel 751: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
752: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
1.75 albertel 753: $sortkey=$role;
1.35 matthew 754: } elsif ($trest) {
755: my $tcourseid=$tdom.'_'.$trest;
1.153 raeburn 756: $ttype = &Apache::loncommon::course_type($tcourseid);
757: $trole = &Apache::lonnet::plaintext($role,$ttype);
1.118 albertel 758: if ($env{'course.'.$tcourseid.'.description'}) {
759: $twhere=$env{'course.'.$tcourseid.'.description'};
1.80 albertel 760: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1.72 www 761: unless ($twhere eq &mt('Currently not available')) {
1.211 ! tempelho 762: $twhere.=' <span class="LC_fontsize_small">'.
1.72 www 763: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
1.211 ! tempelho 764: '</span>';
1.55 albertel 765: }
1.8 www 766: } else {
1.105 raeburn 767: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1.35 matthew 768: if (%newhash) {
1.80 albertel 769: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
1.77 albertel 770: "\0".$envkey;
1.49 www 771: $twhere=$newhash{'description'}.
1.211 ! tempelho 772: ' <span class="LC_fontsize_small">'.
1.72 www 773: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
1.211 ! tempelho 774: '</span>';
1.152 raeburn 775: $ttype = $newhash{'type'};
1.153 raeburn 776: $trole = &Apache::lonnet::plaintext($role,$ttype);
1.35 matthew 777: } else {
1.72 www 778: $twhere=&mt('Currently not available');
1.118 albertel 779: $env{'course.'.$tcourseid.'.description'}=$twhere;
1.80 albertel 780: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1.152 raeburn 781: $ttype = 'Unavailable';
1.35 matthew 782: }
1.8 www 783: }
1.121 albertel 784: if ($tsection) {
1.175 albertel 785: $twhere.='<br />'.&mt('Section').': '.$tsection;
1.121 albertel 786: }
1.72 www 787: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
1.35 matthew 788: } elsif ($tdom) {
1.78 sakharuk 789: $ttype='Domain';
1.35 matthew 790: $twhere=$tdom;
1.75 albertel 791: $sortkey=$role.$twhere;
1.35 matthew 792: } else {
1.78 sakharuk 793: $ttype='System';
1.72 www 794: $twhere=&mt('system wide');
1.75 albertel 795: $sortkey=$role.$twhere;
1.13 www 796: }
1.209 raeburn 797: $roletext.=&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit);
1.75 albertel 798: $roletext{$envkey}=$roletext;
799: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
800: $sortrole{$sortkey}=$envkey;
801: $roleclass{$envkey}=$ttype;
1.55 albertel 802: }
1.4 www 803: }
1.75 albertel 804: }
1.196 raeburn 805: if ($env{'user.adv'}) {
806: $r->print(
807: '<br /><span class="LC_rolesinfo"><label>'.&mt('Show all roles').': <input type="checkbox" name="showall"');
808: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
809: $r->print(' /></label><input type="submit" value="'.&mt('Display').'" /></span>');
810: } else {
811: if ($countactive > 0) {
812: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1.201 raeburn 813: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
814: $r->print('<p>'.&mt('[_1]Visit the [_2]Course Catalog[_3] to view all [_4] LON-CAPA courses.','<b>','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a></b>',$domdesc).'<br />'.&mt('If a course is [_1]not[_2] in your list of current courses below, you may be able to enroll if self-enrollment is permitted.','<b>','</b>').'</p>');
1.196 raeburn 815: }
816: }
817:
1.84 www 818: # No active roles
819: if ($countactive==0) {
820: if ($inrole) {
821: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
822: } else {
823: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
824: }
1.191 raeburn 825: &findcourse_advice($r);
826: $r->print('</form>');
827: if ($countfuture) {
828: $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
829: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
830: $nochoose);
831: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
832: \%roletext);
833: my $tremark='';
834: my $tfont='#003300';
835: if ($env{'request.role'} eq 'cm') {
836: $r->print('<tr bgcolor="#11CC55">');
1.204 bisitz 837: $tremark=&mt('Currently selected.').' ';
1.191 raeburn 838: $tfont='#002200';
839: } else {
840: $r->print('<tr bgcolor="#77FF77">');
841: }
1.211 ! tempelho 842: $r->print('<td></td><td colspan="3"><span style="color:'.$tfont.';"><span class="LC_rolesinfo">'.&mt('No role specified').
! 843: '</span></font></td><td><span style="color:'.$tfont.';">'.$tremark.
1.191 raeburn 844: ' </font></td></tr>'."\n");
845:
846: $r->print('</table>');
847: }
848: $r->print(&Apache::loncommon::end_page());
1.84 www 849: return OK;
850: }
851: # ----------------------------------------------------------------------- Table
1.202 raeburn 852: unless ((!&Apache::lonmenu::show_course()) || ($nochoose) || ($countactive==1)) {
1.173 albertel 853: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
1.84 www 854: }
1.191 raeburn 855: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
1.118 albertel 856: if ($env{'environment.recentroles'}) {
1.111 albertel 857: my %recent_roles =
1.118 albertel 858: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
1.111 albertel 859: my $output='';
860: foreach (sort(keys(%recent_roles))) {
861: if (defined($roletext{'user.role.'.$_})) {
862: $output.=$roletext{'user.role.'.$_};
1.170 albertel 863: if ($_ =~ m-dc\./($match_domain)/-
864: && $dcroles{$1}) {
1.192 raeburn 865: $output .= &adhoc_roles_row($1,'recent');
1.133 albertel 866: }
1.113 raeburn 867: } elsif ($numdc > 0) {
868: unless ($_ =~/^error\:/) {
869: $output.=&display_cc_role('user.role.'.$_);
870: }
871: }
1.111 albertel 872: }
873: if ($output) {
1.211 ! tempelho 874: $r->print("<tr><td align='center' colspan='5'>".
! 875: &mt('Recent Roles')."</td></tr>");
1.111 albertel 876: $r->print($output);
1.114 raeburn 877: $doheaders ++;
1.111 albertel 878: }
879: }
880:
1.104 raeburn 881: if ($numdc > 0) {
1.112 raeburn 882: $r->print(&coursepick_jscript());
1.193 raeburn 883: $r->print(&Apache::loncommon::coursebrowser_javascript().
884: &Apache::loncommon::authorbrowser_javascript());
1.108 raeburn 885: }
1.191 raeburn 886: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
1.202 raeburn 887: if ($countactive > 1) {
888: my $tremark='';
889: my $tfont='#003300';
890: if ($env{'request.role'} eq 'cm') {
891: $r->print('<tr bgcolor="#11CC55">');
1.204 bisitz 892: $tremark=&mt('Currently selected.').' ';
1.202 raeburn 893: $tfont='#002200';
894: } else {
895: $r->print('<tr bgcolor="#77FF77">');
896: }
897: unless ($nochoose) {
898: if ($env{'request.role'} ne 'cm') {
899: $r->print('<td><input type="submit" value="'.
900: &mt('Select').'" name="cm" /></td>');
901: } else {
902: $r->print('<td> </td>');
903: }
904: }
1.211 ! tempelho 905: $r->print('<td colspan="3"><span style="color:'.$tfont.';"><span class="LC_rolesinfo">'.&mt('No role specified').
! 906: '</span></span></td><td><span style="color:'.$tfont.';">'.$tremark.
! 907: ' </span></td></tr>'."\n");
1.202 raeburn 908: }
1.4 www 909: $r->print('</table>');
910: unless ($nochoose) {
911: $r->print("</form>\n");
912: }
1.22 harris41 913: # ------------------------------------------------------------ Privileges Info
1.118 albertel 914: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
1.127 albertel 915: $r->print('<hr /><h2>Current Privileges</h2>');
1.175 albertel 916: $r->print(&privileges_info());
1.4 www 917: }
1.66 www 918: $r->print(&Apache::lonnet::getannounce());
1.65 www 919: if ($advanced) {
1.201 raeburn 920: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1.195 bisitz 921: $r->print('<p><small><i>'
922: .&mt('This is LON-CAPA [_1]',$r->dir_config('lonVersion'))
923: .'</i><br />'
1.197 raeburn 924: .'<a href="/adm/logout">'.&mt('Logout').'</a> '
1.201 raeburn 925: .'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
926: .&mt('Course Catalog')
1.197 raeburn 927: .'</small></p>');
1.65 www 928: }
1.147 albertel 929: $r->print(&Apache::loncommon::end_page());
1.1 harris41 930: return OK;
1.102 raeburn 931: }
932:
1.191 raeburn 933: sub roletable_headers {
934: my ($r,$roleclass,$sortrole,$nochoose) = @_;
935: my $doheaders;
936: if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
937: $r->print('<br /><table id="LC_rolesmenu"><tr>');
938: if (!$nochoose) { $r->print('<th> </th>'); }
939: $r->print('<th>'.&mt('User Role').'</th><th>'.&mt('Extent')
940: .'</th><th>'.&mt('Start').'</th><th>'.&mt('End')
941: .'</th></tr>'."\n");
942: $doheaders=-1;
943: my @roletypes = &roletypes();
944: foreach my $type (@roletypes) {
945: my $haverole=0;
946: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
947: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
948: $haverole=1;
949: }
950: }
951: if ($haverole) { $doheaders++; }
952: }
953: }
954: return $doheaders;
955: }
956:
957: sub roletypes {
958: my @types = ('Domain','Construction Space','Course','Unavailable','System');
959: return @types;
960: }
961:
962: sub print_rolerows {
963: my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
964: if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
965: my @types = &roletypes();
966: foreach my $type (@types) {
967: my $output;
968: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
969: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
970: if (ref($roletext) eq 'HASH') {
971: $output.=$roletext->{$sortrole->{$which}};
972: if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
973: if (ref($dcroles) eq 'HASH') {
974: if ($dcroles->{$1}) {
1.192 raeburn 975: $output .= &adhoc_roles_row($1,'');
1.191 raeburn 976: }
977: }
978: }
979: }
980: }
981: }
982: if ($output) {
983: if ($doheaders > 0) {
984: $r->print("<tr>".
1.211 ! tempelho 985: "<td align='center' colspan='5'>".
! 986: &mt($type)."</td></tr>");
1.191 raeburn 987: }
988: $r->print($output);
989: }
990: }
991: }
992: }
993:
994: sub findcourse_advice {
995: my ($r) = @_;
996: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1.201 raeburn 997: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1.200 raeburn 998: if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
1.191 raeburn 999: $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
1000: <ul>
1001: <li>'.&mt('The course has yet to be created.').'</li>
1002: <li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
1003: <li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
1004: <li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
1005: <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>
1006: </ul>');
1007: } else {
1008: $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 />');
1009: }
1.201 raeburn 1010: $r->print('<p>'.&mt('The [_1]Course Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created.','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a>',$domdesc).'<br />');
1.191 raeburn 1011: $r->print(&mt('You can search the course catalog for courses which permit self-enrollment, if you would like to enroll in a course.').'</p>');
1012: return;
1013: }
1014:
1.175 albertel 1015: sub privileges_info {
1016: my ($which) = @_;
1017: my $output;
1018:
1019: $which ||= $env{'request.role'};
1020:
1021: foreach my $envkey (sort(keys(%env))) {
1022: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
1023:
1024: my $where=$1;
1025: my $ttype;
1026: my $twhere;
1027: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
1028: if ($trest) {
1029: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
1030: $ttype='Construction Space';
1031: $twhere='User: '.$trest.', Domain: '.$tdom;
1032: } else {
1033: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
1034: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
1035: if ($tsec) {
1036: my $sec_type = 'Section';
1037: if (exists($env{"user.role.gr.$where"})) {
1038: $sec_type = 'Group';
1039: }
1040: $twhere.=' ('.$sec_type.': '.$tsec.')';
1041: }
1042: }
1043: } elsif ($tdom) {
1044: $ttype='Domain';
1045: $twhere=$tdom;
1046: } else {
1047: $ttype='System';
1048: $twhere='/';
1049: }
1.204 bisitz 1050: $output .= "\n<h3>".&mt($ttype).': '.$twhere.'</h3>'."\n<ul>";
1.175 albertel 1051: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
1052: next if (!$priv);
1053:
1054: my ($prv,$restr)=split(/\&/,$priv);
1055: my $trestr='';
1056: if ($restr ne 'F') {
1057: $trestr.=' ('.
1058: join(', ',
1059: map { &Apache::lonnet::plaintext($_) }
1060: (split('',$restr))).') ';
1061: }
1062: $output .= "\n\t".
1063: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
1064: }
1065: $output .= "\n".'</ul>';
1066: }
1067: return $output;
1068: }
1069:
1.102 raeburn 1070: sub role_status {
1071: my ($rolekey,$then,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
1072: my @pwhere = ();
1.118 albertel 1073: if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
1.102 raeburn 1074: (undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
1075: unless (!defined($$role) || $$role eq '') {
1076: $$where=join('.',@pwhere);
1077: $$trolecode=$$role.'.'.$$where;
1.118 albertel 1078: ($$tstart,$$tend)=split(/\./,$env{$rolekey});
1.102 raeburn 1079: $$tstatus='is';
1.105 raeburn 1080: if ($$tstart && $$tstart>$then) {
1081: $$tstatus='future';
1082: if ($$tstart<$now) { $$tstatus='will'; }
1.102 raeburn 1083: }
1084: if ($$tend) {
1085: if ($$tend<$then) {
1086: $$tstatus='expired';
1.103 raeburn 1087: } elsif ($$tend<$now) {
1.104 raeburn 1088: $$tstatus='will_not';
1.102 raeburn 1089: }
1090: }
1091: }
1092: }
1093: }
1.1 harris41 1094:
1.110 raeburn 1095: sub build_roletext {
1.209 raeburn 1096: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit) = @_;
1.177 www 1097: my $roletext='<tr bgcolor="'.$tbg.'" class="LC_rolesmenu_'.$tstatus.'">';
1.132 albertel 1098: my $is_dc=($trolecode =~ m/^dc\./);
1099: my $rowspan=($is_dc) ? ''
1100: : ' rowspan="2" ';
1101:
1.110 raeburn 1102: unless ($nochoose) {
1.134 www 1103: my $buttonname=$trolecode;
1104: $buttonname=~s/\W//g;
1.110 raeburn 1105: if (!$button) {
1106: if ($switchserver) {
1.177 www 1107: $roletext.='<td'.$rowspan.'><span class="LC_rolesinfo"><a href="/adm/switchserver?'.
1108: $switchserver.'">'.&mt('Switch Server').'</a></span></td>';
1.110 raeburn 1109: } else {
1.164 albertel 1110: $roletext.=('<td'.$rowspan.'> </td>');
1.110 raeburn 1111: }
1112: } elsif ($tstatus eq 'is') {
1.134 www 1113: $roletext.='<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
1114: &mt('Select').'" onClick="javascript:enterrole(this.form,\''.
1.192 raeburn 1115: $trolecode."','".$buttonname.'\');" /></td>';
1.110 raeburn 1116: } elsif ($tryagain) {
1117: $roletext.=
1.134 www 1118: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
1119: &mt('Try Selecting Again').'" onClick="javascript:enterrole(this.form,\''.
1.192 raeburn 1120: $trolecode."','".$buttonname.'\');" /></td>';
1.110 raeburn 1121: } elsif ($advanced) {
1122: $roletext.=
1.134 www 1123: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
1124: &mt('Re-Initialize').'" onClick="javascript:enterrole(this.form,\''.
1.192 raeburn 1125: $trolecode."','".$buttonname.'\');" /></td>';
1.209 raeburn 1126: } elsif ($reinit) {
1127: $roletext.=
1128: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
1129: &mt('Re-Select').'" onClick="javascript:enterrole(this.form,\''.
1130: $trolecode."','".$buttonname.'\');" /></td>';
1.110 raeburn 1131: } else {
1.209 raeburn 1132: $roletext.=
1133: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
1134: &mt('Re-Initialize').'" onClick="javascript:enterrole(this.form,\''.
1135: $trolecode."','".$buttonname.'\');" /></td>';
1.110 raeburn 1136: }
1137: }
1.165 albertel 1138: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
1139: $tremark.=&Apache::lonannounce::showday(time,1,
1140: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
1141: }
1.211 ! tempelho 1142: $roletext.='<td><span style="color:'.$tfont.';">'.$trole.
! 1143: '</span></td><td><span style="color:'.$tfont.';">'.$twhere.
! 1144: '</span></td><td><span style="color:'.$tfont.';">'.$tpstart.
! 1145: '</span></td><td><span style="color:'.$tfont.';">'.$tpend.
! 1146: '</span></td></tr>';
1.132 albertel 1147: if (!$is_dc) {
1.211 ! tempelho 1148: $roletext.='<tr bgcolor="'.$tbg.'"><td colspan="4"><span style="color:'.$tfont.';"><span class="LC_rolesinfo">'.$tremark.
! 1149: '</span> </span></td></tr><tr><td colspan="5" height="3"></td></tr>'."\n";
1.132 albertel 1150: }
1.110 raeburn 1151: return $roletext;
1152: }
1153:
1.202 raeburn 1154: sub check_needs_switchserver {
1155: my ($possiblerole) = @_;
1156: my $needs_switchserver;
1157: my ($role,$where) = split(/\./,$possiblerole,2);
1158: my (undef,$tdom,$twho) = split(/\//,$where);
1159: my ($server_status,$home);
1160: if (($role eq 'ca') || ($role eq 'aa')) {
1161: ($server_status,$home) = &check_author_homeserver($twho,$tdom);
1162: } else {
1163: ($server_status,$home) = &check_author_homeserver($env{'user.name'},
1164: $env{'user.domain'});
1165: }
1166: if ($server_status eq 'switchserver') {
1167: $needs_switchserver = 1;
1168: }
1169: return $needs_switchserver;
1170: }
1171:
1.193 raeburn 1172: sub check_author_homeserver {
1.183 www 1173: my ($uname,$udom)=@_;
1.193 raeburn 1174: if (($uname eq '') || ($udom eq '')) {
1175: return ('fail','');
1176: }
1.183 www 1177: my $home = &Apache::lonnet::homeserver($uname,$udom);
1.193 raeburn 1178: if (&Apache::lonnet::host_domain($home) ne $udom) {
1179: return ('fail',$home);
1180: }
1.183 www 1181: my @ids=&Apache::lonnet::current_machine_ids();
1.193 raeburn 1182: if (grep(/^\Q$home\E$/,@ids)) {
1183: return ('ok',$home);
1184: } else {
1185: return ('switchserver',$home);
1.183 www 1186: }
1187: }
1188:
1.110 raeburn 1189: sub check_privs {
1.182 www 1190: my ($cdom,$cnum,$then,$now,$checkrole) = @_;
1191: my $cckey = 'user.role.'.$checkrole.'./'.$cdom.'/'.$cnum;
1.118 albertel 1192: if ($env{$cckey}) {
1.110 raeburn 1193: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
1194: &role_status($cckey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
1195: unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
1.182 www 1196: &set_privileges($cdom,$cnum,$checkrole);
1.110 raeburn 1197: }
1198: } else {
1.182 www 1199: &set_privileges($cdom,$cnum,$checkrole);
1.110 raeburn 1200: }
1201: }
1202:
1.104 raeburn 1203: sub check_fordc {
1204: my ($dcroles,$then) = @_;
1205: my $numdc = 0;
1.118 albertel 1206: if ($env{'user.adv'}) {
1207: foreach my $envkey (sort keys %env) {
1.170 albertel 1208: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
1.104 raeburn 1209: my $dcdom = $1;
1210: my $livedc = 1;
1.118 albertel 1211: my ($tstart,$tend)=split(/\./,$env{$envkey});
1.105 raeburn 1212: if ($tstart && $tstart>$then) { $livedc = 0; }
1213: if ($tend && $tend <$then) { $livedc = 0; }
1.104 raeburn 1214: if ($livedc) {
1215: $$dcroles{$dcdom} = $envkey;
1.105 raeburn 1216: $numdc++;
1.104 raeburn 1217: }
1218: }
1219: }
1220: }
1221: return $numdc;
1222: }
1223:
1.185 raeburn 1224: sub adhoc_course_role {
1225: my ($then) = @_;
1226: my ($cdom,$cnum);
1.201 raeburn 1227: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1228: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1.185 raeburn 1229: if (&check_forcc($cdom,$cnum,$then)) {
1230: my $setprivs;
1.198 raeburn 1231: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
1.185 raeburn 1232: $setprivs = 1;
1233: } else {
1.198 raeburn 1234: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
1.185 raeburn 1235: if (($start && ($start>$then || $start == -1)) ||
1236: ($end && $end<$then)) {
1237: $setprivs = 1;
1238: }
1239: }
1240: if ($setprivs) {
1.198 raeburn 1241: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
1.185 raeburn 1242: my $role = $1;
1243: my $custom_role = $2;
1244: my $usec = $3;
1245: if ($role eq 'cr') {
1.199 raeburn 1246: if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
1.185 raeburn 1247: $role .= $custom_role;
1248: } else {
1249: return;
1250: }
1251: }
1.208 raeburn 1252: my (%userroles,%newrole,%newgroups,%group_privs);
1253: my %cgroups =
1254: &Apache::lonnet::get_active_groups($env{'user.domain'},
1255: $env{'user.name'},$cdom,$cnum);
1256: foreach my $group (keys(%cgroups)) {
1257: $group_privs{$group} =
1258: $env{'user.priv.cc./'.$cdom.'/'.$cnum.'./'.$cdom.'/'.$cnum.'/'.$group};
1259: }
1260: $newgroups{'/'.$cdom.'/'.$cnum} = \%group_privs;
1.185 raeburn 1261: my $area = '/'.$cdom.'/'.$cnum;
1262: my $spec = $role.'.'.$area;
1263: if ($usec ne '') {
1264: $spec .= '/'.$usec;
1265: $area .= '/'.$usec;
1266: }
1267: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1.208 raeburn 1268: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,\%newgroups);
1.185 raeburn 1269: my $adhocstart = $then-1;
1270: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1.186 raeburn 1271: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1.185 raeburn 1272: }
1273: }
1274: }
1275: return;
1276: }
1277:
1278: sub check_forcc {
1279: my ($cdom,$cnum,$then) = @_;
1280: my $is_cc;
1281: if ($cdom ne '' && $cnum ne '') {
1282: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1283: my $envkey = 'user.role.cc./'.$cdom.'/'.$cnum;
1284: if (defined($env{$envkey})) {
1285: $is_cc = 1;
1286: my ($tstart,$tend)=split(/\./,$env{$envkey});
1287: if ($tstart && $tstart>$then) { $is_cc = 0; }
1288: if ($tend && $tend <$then) { $is_cc = 0; }
1289: }
1290: }
1291: }
1292: return $is_cc;
1293: }
1294:
1.108 raeburn 1295: sub courselink {
1.193 raeburn 1296: my ($dcdom,$rowtype) = @_;
1.109 raeburn 1297: my $courseform=&Apache::loncommon::selectcourse_link
1.152 raeburn 1298: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1299: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1.173 albertel 1300: $dcdom,$dcdom,undef);
1.138 raeburn 1301: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1302: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1303: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1304: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1.112 raeburn 1305: return $courseform.$hiddenitems;
1.109 raeburn 1306: }
1307:
1308: sub coursepick_jscript {
1.184 raeburn 1309: my %lt = &Apache::lonlocal::texthash(
1310: plsu => "Please use the 'Select Course' link to open a separate pick course window where you may select the course you wish to enter.",
1311: youc => 'You can only use this screen to select courses in the current domain.',
1312: );
1.104 raeburn 1313: my $verify_script = <<"END";
1.179 raeburn 1314: <script type="text/javascript">
1.108 raeburn 1315: function verifyCoursePick(caller) {
1316: var numbutton = getIndex(caller)
1.112 raeburn 1317: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1318: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1319: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1.104 raeburn 1320: if (pickedCourse != '') {
1.108 raeburn 1321: if (numbutton != -1) {
1322: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1323: document.rolechoice.elements[numbutton+1].name = courseTarget
1324: document.rolechoice.submit()
1325: }
1.104 raeburn 1326: }
1327: else {
1.184 raeburn 1328: alert("$lt{'plsu'}");
1.104 raeburn 1329: }
1330: }
1331: else {
1.184 raeburn 1332: alert("$lt{'youc'}")
1.104 raeburn 1333: }
1334: }
1.109 raeburn 1335: function getIndex(caller) {
1.108 raeburn 1336: for (var i=0;i<document.rolechoice.elements.length;i++) {
1.109 raeburn 1337: if (document.rolechoice.elements[i] == caller) {
1.108 raeburn 1338: return i;
1339: }
1340: }
1341: return -1;
1342: }
1.104 raeburn 1343: </script>
1344: END
1.109 raeburn 1345: return $verify_script;
1.104 raeburn 1346: }
1347:
1.193 raeburn 1348: sub coauthorlink {
1349: my ($dcdom,$rowtype) = @_;
1350: my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
1351: my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
1352: return $coauthorform.$hiddenitems;
1353: }
1354:
1.113 raeburn 1355: sub display_cc_role {
1356: my $rolekey = shift;
1357: my $roletext;
1.118 albertel 1358: my $advanced = $env{'user.adv'};
1359: my $tryagain = $env{'form.tryagain'};
1.113 raeburn 1360: unless ($rolekey =~/^error\:/) {
1.171 albertel 1361: if ($rolekey =~ m-^user\.role.cc\./($match_domain)/($match_courseid)$-) {
1.113 raeburn 1362: my $tcourseid = $1.'_'.$2;
1363: my $trolecode = 'cc./'.$1.'/'.$2;
1364: my $twhere;
1.152 raeburn 1365: my $ttype;
1.113 raeburn 1366: my $tbg='#77FF77';
1367: my $tfont='#003300';
1368: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1369: if (%newhash) {
1370: $twhere=$newhash{'description'}.
1.211 ! tempelho 1371: ' <span style="LC_fontsize_small">'.
1.113 raeburn 1372: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1,$tfont).
1.211 ! tempelho 1373: '</span>';
1.153 raeburn 1374: $ttype = $newhash{'type'};
1.113 raeburn 1375: } else {
1376: $twhere=&mt('Currently not available');
1.118 albertel 1377: $env{'course.'.$tcourseid.'.description'}=$twhere;
1.110 raeburn 1378: }
1.153 raeburn 1379: my $trole = &Apache::lonnet::plaintext('cc',$ttype);
1.113 raeburn 1380: $twhere.="<br />".&mt('Domain').":".$1;
1.152 raeburn 1381: $roletext = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$tfont,$trole,$twhere,'','','',1,'');
1.104 raeburn 1382: }
1383: }
1.152 raeburn 1384: return ($roletext);
1.104 raeburn 1385: }
1386:
1.192 raeburn 1387: sub adhoc_roles_row {
1.138 raeburn 1388: my ($dcdom,$rowtype) = @_;
1.132 albertel 1389: my $output = '<tr bgcolor="#77FF77">'.
1.192 raeburn 1390: ' <td colspan="5"><table><tr><td><span class="LC_rolesinfo">'
1391: .&mt('[_1]Ad hoc[_2] roles in domain [_3] --',
1392: '<span class="LC_cusr_emph">','</span>',$dcdom).'</span></td><td>';
1.193 raeburn 1393: my $selectcclink = &courselink($dcdom,$rowtype);
1.173 albertel 1394: my $ccrole = &Apache::lonnet::plaintext('cc');
1.182 www 1395: my $carole = &Apache::lonnet::plaintext('ca');
1.193 raeburn 1396: my $selectcalink = &coauthorlink($dcdom,$rowtype);
1.182 www 1397: $output.= '<span class="LC_rolesinfo">'.
1.193 raeburn 1398: &mt('[_1]: [_2]',$ccrole,$selectcclink).
1.192 raeburn 1399: '</span><br /></td><td> </td><td><span class="LC_rolesinfo">'.
1.193 raeburn 1400: &mt('[_1]: [_2]',$carole,$selectcalink).
1.192 raeburn 1401: '</span><br /></td></tr></table></td></tr>'.
1402: '<tr><td colspan="5" height="3"></td></tr>'."\n";
1.108 raeburn 1403: return $output;
1404: }
1405:
1.104 raeburn 1406: sub recent_filename {
1407: my $area=shift;
1.149 www 1408: return 'nohist_recent_'.&escape($area);
1.104 raeburn 1409: }
1410:
1.106 raeburn 1411: sub set_privileges {
1.182 www 1412: # role can be cc or ca
1413: my ($dcdom,$pickedcourse,$role) = @_;
1.106 raeburn 1414: my $area = '/'.$dcdom.'/'.$pickedcourse;
1415: my $spec = $role.'.'.$area;
1.168 albertel 1416: my %userroles = &Apache::lonnet::set_arearole($role,$area,'','',
1417: $env{'user.domain'},
1418: $env{'user.name'});
1.106 raeburn 1419: my %ccrole = ();
1420: &Apache::lonnet::standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
1.154 albertel 1421: my ($author,$adv)= &Apache::lonnet::set_userprivs(\%userroles,\%ccrole);
1.186 raeburn 1422: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1.184 raeburn 1423:
1.118 albertel 1424: &Apache::lonnet::log($env{'user.domain'},
1425: $env{'user.name'},
1426: $env{'user.home'},
1.106 raeburn 1427: "Role ".$role);
1428: &Apache::lonnet::appenv(
1.186 raeburn 1429: {'request.role' => $spec,
1.106 raeburn 1430: 'request.role.domain' => $dcdom,
1.186 raeburn 1431: 'request.course.sec' => ''});
1.106 raeburn 1432: my $tadv=0;
1433: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1.186 raeburn 1434: &Apache::lonnet::appenv({'request.role.adv' => $tadv});
1.106 raeburn 1435: }
1436:
1.139 raeburn 1437: sub courseloadpage {
1438: my ($courseid) = @_;
1439: my $startpage;
1.144 albertel 1440: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1441: [$courseid.':courseinit']);
1.139 raeburn 1442: my ($tmp) = %entry_settings;
1.144 albertel 1443: unless ($tmp =~ /^error: 2 /) {
1.139 raeburn 1444: $startpage = $entry_settings{$courseid.':courseinit'};
1445: }
1446: if ($startpage eq '') {
1447: if (exists($env{'environment.course_init_display'})) {
1448: $startpage = $env{'environment.course_init_display'};
1449: }
1450: }
1451: return $startpage;
1452: }
1453:
1.1 harris41 1454: 1;
1455: __END__
1.32 harris41 1456:
1457: =head1 NAME
1458:
1459: Apache::lonroles - User Roles Screen
1460:
1461: =head1 SYNOPSIS
1462:
1463: Invoked by /etc/httpd/conf/srm.conf:
1464:
1465: <Location /adm/roles>
1466: PerlAccessHandler Apache::lonacc
1467: SetHandler perl-script
1468: PerlHandler Apache::lonroles
1469: ErrorDocument 403 /adm/login
1470: ErrorDocument 500 /adm/errorhandler
1471: </Location>
1.64 bowersj2 1472:
1473: =head1 OVERVIEW
1474:
1475: =head2 Choosing Roles
1476:
1477: C<lonroles> is a handler that allows a user to switch roles in
1478: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1479: default role that a user has before selecting a role, as widely as
1480: possible, but certain handlers for example need specification which
1481: course they should act on, etc. Both in this scenario, and when the
1482: handler determines via C<lonnet>'s C<&allowed> function that a certain
1483: action is not allowed, C<lonroles> is used as error handler. This
1484: allows the user to select another role which may have permission to do
1485: what they were trying to do. C<lonroles> can also be accessed via the
1486: B<CRS> button in the Remote Control.
1487:
1488: =begin latex
1489:
1490: \begin{figure}
1491: \begin{center}
1492: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1493: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1494: \end{center}
1495: \end{figure}
1496:
1497: =end latex
1498:
1499: =head2 Role Initialization
1500:
1501: 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.
1.32 harris41 1502:
1503: =head1 INTRODUCTION
1504:
1505: This module enables a user to select what role he wishes to
1506: operate under (instructor, student, teaching assistant, course
1507: coordinator, etc). These roles are pre-established by the actions
1508: of upper-level users.
1509:
1510: This is part of the LearningOnline Network with CAPA project
1511: described at http://www.lon-capa.org.
1512:
1513: =head1 HANDLER SUBROUTINE
1514:
1515: This routine is called by Apache and mod_perl.
1516:
1517: =over 4
1518:
1519: =item *
1520:
1521: Roles Initialization (yes/no)
1522:
1523: =item *
1524:
1525: Get Error Message from Environment
1526:
1527: =item *
1528:
1529: Who is this?
1530:
1531: =item *
1532:
1533: Generate Page Output
1534:
1535: =item *
1536:
1537: Choice or no choice
1538:
1539: =item *
1540:
1541: Table
1542:
1543: =item *
1544:
1545: Privileges
1546:
1547: =back
1548:
1549: =cut
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