Annotation of loncom/auth/lonroles.pm, revision 1.67
1.1 harris41 1: # The LearningOnline Network with CAPA
2: # User Roles Screen
1.31 www 3: #
1.67 ! albertel 4: # $Id: lonroles.pm,v 1.66 2003/08/12 19:46:04 www 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: #
1.1 harris41 28: # (Directory Indexer
29: # (Login Screen
1.32 harris41 30: # YEAR=1999
1.1 harris41 31: # 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14 Gerd Kortemeyer)
32: # 11/23 Gerd Kortemeyer)
1.32 harris41 33: # YEAR=2000
1.7 www 34: # 1/14,03/06,06/01,07/22,07/24,07/25,
1.19 www 35: # 09/04,09/06,09/28,09/29,09/30,10/2,10/5,10/26,10/28,
1.20 www 36: # 12/08,12/28,
1.32 harris41 37: # YEAR=2001
1.20 www 38: # 01/15/01 Gerd Kortemeyer
1.28 www 39: # 03/02,05/03,05/25,05/30,06/01,07/06,08/06 Gerd Kortemeyer
1.33 www 40: # 12/29 Gerd Kortemeyer
1.32 harris41 41: #
42: ###
1.22 harris41 43:
1.1 harris41 44: package Apache::lonroles;
45:
46: use strict;
47: use Apache::lonnet();
1.7 www 48: use Apache::lonuserstate();
1.1 harris41 49: use Apache::Constants qw(:common);
1.2 www 50: use Apache::File();
1.26 www 51: use Apache::lonmenu;
1.29 albertel 52: use Apache::loncommon;
1.57 www 53: use Apache::lonannounce;
1.1 harris41 54:
1.62 matthew 55: sub redirect_user {
56: my ($r,$title,$url,$msg) = @_;
57: $msg = $title if (! defined($msg));
58: $r->content_type('text/html');
59: &Apache::loncommon::no_cache($r);
60: $r->send_http_header;
61: my $swinfo=&Apache::lonmenu::rawconfig();
62: my $bodytag=&Apache::loncommon::bodytag('Switching Role');
63: $r->print (<<ENDREDIR);
64: <head><title>$title</title>
65: <meta HTTP-EQUIV="Refresh" CONTENT="1; url=$url">
66: </head>
67: <html>
68: $bodytag
69: <script>
70: $swinfo
71: </script>
72: <h1>$msg</h1>
73: </body>
74: </html>
75: ENDREDIR
76: return;
77: }
78:
1.1 harris41 79: sub handler {
1.10 www 80:
1.1 harris41 81: my $r = shift;
82:
1.6 www 83: my $now=time;
84: my $then=$ENV{'user.login.time'};
85: my $envkey;
86:
1.10 www 87:
1.6 www 88: # ================================================================== Roles Init
89:
90: if ($ENV{'form.selectrole'}) {
1.33 www 91: if ($ENV{'request.course.id'}) {
92: my %temp=('logout_'.$ENV{'request.course.id'} => time);
93: &Apache::lonnet::put('email_status',\%temp);
94: }
1.55 albertel 95: &Apache::lonnet::appenv("request.course.id" => '',
96: "request.course.fn" => '',
97: "request.course.uri" => '',
98: "request.course.sec" => '',
99: "request.role" => 'cm',
1.56 www 100: "request.role.adv" => $ENV{'user.adv'},
1.55 albertel 101: "request.role.domain" => $ENV{'user.domain'});
1.13 www 102: foreach $envkey (keys %ENV) {
1.40 matthew 103: next if ($envkey!~/^user\.role\./);
104: my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
1.6 www 105: my $where=join('.',@pwhere);
106: my $trolecode=$role.'.'.$where;
107: if ($ENV{'form.'.$trolecode}) {
1.55 albertel 108: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
109: my $tstatus='is';
110: if ($tstart) {
111: if ($tstart>$then) {
112: $tstatus='future';
113: }
114: }
115: if ($tend) {
116: if ($tend<$then) { $tstatus='expired'; }
117: if ($tend<$now) { $tstatus='will_not'; }
118: }
119: if ($tstatus eq 'is') {
120: $where=~s/^\///;
121: my ($cdom,$cnum,$csec)=split(/\//,$where);
1.53 www 122: # check for keyed access
1.55 albertel 123: if (($role eq 'st') &&
124: ($ENV{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
125: unless (&Apache::lonnet::validate_access_key(
126: $ENV{'environment.key.'.$cdom.'_'.$cnum},
127: $cdom,$cnum)) {
1.53 www 128: # there is no valid key
1.55 albertel 129: if ($ENV{'form.newkey'}) {
1.53 www 130: # student attempts to register a new key
1.55 albertel 131: } else {
1.53 www 132: # print form to enter a new key
1.55 albertel 133: $r->content_type('text/html');
134: &Apache::loncommon::no_cache($r);
135: $r->send_http_header;
136: my $swinfo=&Apache::lonmenu::rawconfig();
137: my $bodytag=&Apache::loncommon::bodytag
138: ('Enter Access Key to Unlock this Course');
139: $r->print(<<ENDENTERKEY);
1.53 www 140: <head><title>Entering Course Access Key</title>
141: </head>
142: <html>
143: $bodytag
144: <script>
145: $swinfo
146: </script>
147: <form method="post">
148: <input type="hidden" name="selectrole" value="$ENV{'form.selectrole'}" />
149: <input type="text" size="20" name="newkey" value="$ENV{'form.newkey'}" />
150: <input type="submit" value="Enter key" />
151: </form>
152: </body></html>
153: ENDENTERKEY
1.55 albertel 154: return OK;
155: }
156: }
157: }
1.56 www 158: my $tadv=0;
159: if (($trolecode!~/^st/) &&
160: ($trolecode!~/^ta/) &&
161: ($trolecode!~/^cm/)) { $tadv=1; }
162: &Apache::lonnet::appenv(
163: 'request.role' => $trolecode,
164: 'request.role.adv' => $tadv,
165: 'request.role.domain' => $cdom,
166: 'request.course.sec' => $csec);
1.55 albertel 167: my $msg='Entering course ...';
1.62 matthew 168:
1.55 albertel 169: if (($cnum) && ($role ne 'ca')) {
170: my ($furl,$ferr)=
171: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
172: if (($ENV{'form.orgurl'}) &&
173: ($ENV{'form.orgurl'}!~/^\/adm\/flip/)) {
1.67 ! albertel 174: my $dest=$ENV{'form.orgurl'};
! 175: if ( Apache::exists_config_define("MODPERL2") ) {
! 176: &Apache::lonnet::cleanenv();
! 177: }
! 178: $r->internal_redirect($dest);
1.55 albertel 179: return OK;
180: } else {
181: unless ($ENV{'request.course.id'}) {
182: &Apache::lonnet::appenv(
183: "request.course.id" => $cdom.'_'.$cnum);
1.61 www 184: $furl='/adm/roles?tryagain=1';
1.55 albertel 185: $msg=
1.67 ! albertel 186: '<h1><font color=red>Could not initialize course at this time.</font></h1><h3>Please try again.</h3>'.$ferr;
1.55 albertel 187: }
1.58 bowersj2 188:
189: # Check to see if the user is a CC entering a course
190: # for the first time
191: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
192: if (substr($courseid, 0, 1) eq '/') {
193: $courseid = substr($courseid, 1);
194: }
195: $courseid =~ s/\//_/;
196: if ($role eq 'cc' && $ENV{'course.' . $courseid .
197: '.course.helper.not.run'}) {
198: $furl = "/adm/helper/course.initialization.helper";
199: }
1.62 matthew 200: #
201: # Send the user to the course they selected
202: &redirect_user($r,'Entering Course',
203: $furl,$msg);
1.20 www 204: return OK;
1.55 albertel 205: }
206: }
1.62 matthew 207: #
208: # Send the user to the construction space they selected
209: if ($role =~ /^(au|ca)$/) {
210: my $redirect_url = '/priv/';
211: if ($role eq 'au') {
212: $redirect_url.=$ENV{'user.name'};
213: } else {
214: $where =~ /\/(.*)$/;
215: $redirect_url .= $1;
216: }
217: $redirect_url .= '/';
218: &redirect_user($r,'Entering Construction Space',
219: $redirect_url);
220: return OK;
221: }
1.55 albertel 222: }
223: }
1.6 www 224: }
1.40 matthew 225: }
1.44 www 226:
1.10 www 227:
1.6 www 228: # =============================================================== No Roles Init
1.10 www 229:
230: $r->content_type('text/html');
1.30 albertel 231: &Apache::loncommon::no_cache($r);
1.10 www 232: $r->send_http_header;
233: return OK if $r->header_only;
234:
1.52 www 235: my $swinfo=&Apache::lonmenu::rawconfig();
1.41 www 236: my $bodytag=&Apache::loncommon::bodytag('User Roles');
1.48 www 237: my $helptag=&Apache::loncommon::help_open_topic
1.52 www 238: ("General_Intro","Click here for help");
1.10 www 239: $r->print(<<ENDHEADER);
240: <html>
241: <head>
242: <title>LON-CAPA User Roles</title>
1.41 www 243: </head>
244: $bodytag
1.45 www 245: $helptag<br />
1.26 www 246: <script>
247: $swinfo
248: window.focus();
249: </script>
1.10 www 250: ENDHEADER
1.6 www 251:
1.2 www 252: # ------------------------------------------ Get Error Message from Environment
253:
254: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$ENV{'user.error.msg'});
1.12 www 255: if ($ENV{'user.error.msg'}) {
1.55 albertel 256: $r->log_reason(
257: "$msg for $ENV{'user.name'} domain $ENV{'user.domain'} access $priv",$fn);
1.12 www 258: }
1.1 harris41 259:
1.61 www 260: # ------------------------------------------------- Can this user re-init, etc?
1.6 www 261:
1.61 www 262: my $advanced=$ENV{'user.adv'};
263: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
264: my $tryagain=$ENV{'form.tryagain'};
1.6 www 265:
1.2 www 266: # -------------------------------------------------------- Generate Page Output
1.6 www 267: # --------------------------------------------------------------- Error Header?
1.2 www 268: if ($error) {
269: $r->print("<h1>LON-CAPA Access Control</h1>");
1.4 www 270: $r->print("<hr><pre>Access : ".
271: Apache::lonnet::plaintext($priv)."\n");
272: $r->print("Resource: $fn\n");
273: $r->print("Action : $msg\n</pre><hr>");
1.2 www 274: } else {
1.25 www 275: if ($ENV{'user.error.msg'}) {
276: $r->print(
277: '<h3><font color=red>You need to choose another user role or '.
278: 'enter a specific course for this function</font></h3>');
279: }
1.2 www 280: }
1.6 www 281: # -------------------------------------------------------- Choice or no choice?
1.2 www 282: if ($nochoose) {
1.6 www 283: if ($advanced) {
1.55 albertel 284: $r->print("<h2>Assigned User Roles</h2>\n");
1.6 www 285: } else {
1.55 albertel 286: $r->print("<h2>Sorry ...</h2>\nThis resource might be part of");
287: if ($ENV{'request.course.id'}) {
288: $r->print(' another');
289: } else {
290: $r->print(' a certain');
291: }
292: $r->print(' course.</body></html>');
293: return OK;
1.6 www 294: }
295: } else {
296: if ($advanced) {
1.55 albertel 297: $r->print("Your home server is ".
298: $Apache::lonnet::hostname{&Apache::lonnet::homeserver
299: ($ENV{'user.name'},$ENV{'user.domain'})}.
300: "<br />\n");
301: $r->print("Author and Co-Author roles may not be available on ".
302: "servers other than your home server.");
1.6 www 303: } else {
1.59 albertel 304: $r->print("<h2>Select a Course to Enter</h2>\n");
1.17 www 305: }
1.18 www 306: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
307: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
1.6 www 308: }
1.11 www 309: $r->print('<form method=post action="'.(($fn)?$fn:$r->uri).'">');
1.6 www 310: $r->print('<input type=hidden name=orgurl value="'.$fn.'">');
311: $r->print('<input type=hidden name=selectrole value=1>');
312: }
1.63 www 313: if ($ENV{'user.adv'}) {
314: $r->print(
315: '<br />Show all roles: <input type="checkbox" name="showall"');
316: if ($ENV{'form.showall'}) { $r->print(' checked'); }
317: $r->print('><input type=submit value="Display">');
318: }
1.6 www 319: # ----------------------------------------------------------------------- Table
1.63 www 320: $r->print('<br /><table><tr>');
1.6 www 321: unless ($nochoose) { $r->print('<th> </th>'); }
1.55 albertel 322: $r->print('<th>User Role</th><th colspan=2>Extent</th>'.
323: '<th>Start</th><th>End</th><th>Remark</th></tr>'."\n");
1.4 www 324:
1.3 albertel 325: foreach $envkey (sort keys %ENV) {
1.35 matthew 326: my $button = 1;
1.49 www 327: my $switchserver='';
1.2 www 328: if ($envkey=~/^user\.role\./) {
1.40 matthew 329: my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
1.46 matthew 330: next if (!defined($role) || $role eq '');
1.4 www 331: my $where=join('.',@pwhere);
1.6 www 332: my $trolecode=$role.'.'.$where;
1.4 www 333: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
334: my $tremark='';
335: my $tstatus='is';
336: my $tpstart=' ';
337: my $tpend=' ';
1.47 www 338: my $tfont='#000000';
1.4 www 339: if ($tstart) {
340: if ($tstart>$then) {
1.35 matthew 341: $tstatus='future';
342: if ($tstart<$now) { $tstatus='will'; }
1.4 www 343: }
344: $tpstart=localtime($tstart);
345: }
346: if ($tend) {
1.23 www 347: if ($tend<$then) {
1.35 matthew 348: $tstatus='expired';
1.23 www 349: } elsif ($tend<$now) {
1.35 matthew 350: $tstatus='will_not';
1.23 www 351: }
1.4 www 352: $tpend=localtime($tend);
353: }
1.6 www 354: if ($ENV{'request.role'} eq $trolecode) {
355: $tstatus='selected';
356: }
1.4 www 357: my $tbg;
1.35 matthew 358: if (($tstatus eq 'is') || ($tstatus eq 'selected') ||
359: ($ENV{'form.showall'})) {
360: if ($tstatus eq 'is') {
361: $tbg='#77FF77';
1.47 www 362: $tfont='#003300';
1.35 matthew 363: } elsif ($tstatus eq 'future') {
364: $tbg='#FFFF77';
1.49 www 365: $button=0;
1.35 matthew 366: } elsif ($tstatus eq 'will') {
367: $tbg='#FFAA77';
368: $tremark.='Active at next login. ';
369: } elsif ($tstatus eq 'expired') {
370: $tbg='#FF7777';
1.47 www 371: $tfont='#330000';
1.49 www 372: $button=0;
1.35 matthew 373: } elsif ($tstatus eq 'will_not') {
374: $tbg='#AAFF77';
375: $tremark.='Expired after logout. ';
376: } elsif ($tstatus eq 'selected') {
377: $tbg='#11CC55';
1.47 www 378: $tfont='#002200';
1.35 matthew 379: $tremark.='Currently selected. ';
380: }
381: my $trole;
382: if ($role =~ /^cr\//) {
383: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
384: $tremark.='<br>Defined by '.$rauthor.' at '.$rdomain.'.';
385: $trole=$rrole;
1.8 www 386: } else {
1.35 matthew 387: $trole=Apache::lonnet::plaintext($role);
388: }
389: my $ttype;
390: my $twhere;
391: my ($tdom,$trest,$tsection)=
392: split(/\//,Apache::lonnet::declutter($where));
393: # First, Co-Authorship roles
394: if ($role eq 'ca') {
1.39 stredwic 395: my $home = &Apache::lonnet::homeserver($trest,$tdom);
1.49 www 396: if ($home ne $r->dir_config('lonHostID')) {
397: $button=0;
1.51 www 398: $switchserver=&Apache::lonnet::escape('http://'.
399: $Apache::lonnet::hostname{$home}.
400: '/adm/login?domain='.$ENV{'user.domain'}.
401: '&username='.$ENV{'user.name'}.
402: '&firsturl=/priv/'.$trest);
1.49 www 403: }
1.35 matthew 404: #next if ($home eq 'no_host');
405: $home = $Apache::lonnet::hostname{$home};
406: $ttype='Construction Space';
407: $twhere='User: '.$trest.'<br />Domain: '.$tdom.'<br />'.
408: ' Server: '.$home;
409: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
410: } elsif ($role eq 'au') {
411: # Authors
412: my $home = &Apache::lonnet::homeserver
1.39 stredwic 413: ($ENV{'user.name'},$ENV{'user.domain'});
1.49 www 414: if ($home ne $r->dir_config('lonHostID')) {
415: $button=0;
1.51 www 416: $switchserver=&Apache::lonnet::escape('http://'.
417: $Apache::lonnet::hostname{$home}.
418: '/adm/login?domain='.$ENV{'user.domain'}.
419: '&username='.$ENV{'user.name'}.
420: '&firsturl=/priv/'.$ENV{'user.name'});
1.49 www 421: }
1.35 matthew 422: #next if ($home eq 'no_host');
423: $home = $Apache::lonnet::hostname{$home};
424: $ttype='Construction Space';
425: $twhere='Domain: '.$tdom.'<br />Server: '.$home;
426: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
427: } elsif ($trest) {
428: $ttype='Course';
429: if ($tsection) {
430: $ttype.='<br>Section/Group: '.$tsection;
1.37 albertel 431: }
1.35 matthew 432: my $tcourseid=$tdom.'_'.$trest;
433: if ($ENV{'course.'.$tcourseid.'.description'}) {
1.47 www 434: $twhere=$ENV{'course.'.$tcourseid.'.description'};
435: unless ($twhere eq 'Currently not available') {
1.55 albertel 436: $twhere.=' <font size="-2">'.
1.49 www 437: &Apache::loncommon::syllabuswrapper('Syllabus',$trest,$tdom,$tfont).
438: '</font>';
1.55 albertel 439: }
1.8 www 440: } else {
1.35 matthew 441: my %newhash=Apache::lonnet::coursedescription
442: ($tcourseid);
443: if (%newhash) {
1.49 www 444: $twhere=$newhash{'description'}.
445: ' <font size="-2">'.
446: &Apache::loncommon::syllabuswrapper('Syllabus',$trest,$tdom,$tfont).
447: '</font>';
1.35 matthew 448: } else {
449: $twhere='Currently not available';
450: $ENV{'course.'.$tcourseid.'.description'}=$twhere;
451: }
1.8 www 452: }
1.37 albertel 453: if ($role ne 'st') { $twhere.="<br />Domain:".$tdom; }
1.35 matthew 454: } elsif ($tdom) {
455: $ttype='Domain';
456: $twhere=$tdom;
457: } else {
458: $ttype='System';
459: $twhere='system wide';
1.13 www 460: }
1.35 matthew 461:
462: $r->print('<tr bgcolor='.$tbg.'>');
463: unless ($nochoose) {
464: if (!$button) {
1.49 www 465: if ($switchserver) {
466: $r->print('<td><a href="/adm/logout?handover='.
467: $switchserver.'">Switch Server</a></td>');
468: } else {
469: $r->print('<td> </td>');
470: }
1.35 matthew 471: } elsif ($tstatus eq 'is') {
472: $r->print('<td><input type=submit value=Select name="'.
473: $trolecode.'"></td>');
1.61 www 474: } elsif ($tryagain) {
475: $r->print
476: ('<td><input type=submit value="Try Selecting Again"'.
477: ' name="'.$trolecode.'"></td>');
478: } elsif ($advanced) {
1.35 matthew 479: $r->print
480: ('<td><input type=submit value="Re-Initialize"'.
481: ' name="'.$trolecode.'"></td>');
482: } else {
483: $r->print('<td> </td>');
484: }
1.6 www 485: }
1.57 www 486: $tremark.=&Apache::lonannounce::showday(time,1,
487: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
488:
1.55 albertel 489: $r->print('<td><font color="'.$tfont.'">'.$trole.
1.47 www 490: '</font></td><td><font color="'.$tfont.'">'.$ttype.
491: '</font></td><td><font color="'.$tfont.'">'.$twhere.
492: '</font></td><td><font color="'.$tfont.'">'.$tpstart.
493: '</font></td><td><font color="'.$tfont.'">'.$tpend.
494: '</font></td><td><font color="'.$tfont.'">'.$tremark.
495: ' </font></td></tr>'."\n");
1.55 albertel 496: }
1.4 www 497: }
498: }
1.14 www 499: my $tremark='';
1.47 www 500: my $tfont='#003300';
1.14 www 501: if ($ENV{'request.role'} eq 'cm') {
1.19 www 502: $r->print('<tr bgcolor="#11CC55">');
1.14 www 503: $tremark='Currently selected.';
1.47 www 504: $tfont='#002200';
1.14 www 505: } else {
506: $r->print('<tr bgcolor="#77FF77">');
507: }
508: unless ($nochoose) {
1.55 albertel 509: if ($ENV{'request.role'} ne 'cm') {
510: $r->print('<td><input type=submit value=Select name="cm"></td>');
511: } else {
512: $r->print('<td> </td>');
513: }
1.14 www 514: }
1.47 www 515: $r->print('<td colspan=5><font color="'.$tfont.'">No role specified'.
516: '</font></td><td><font color="'.$tfont.'">'.$tremark.
517: ' </font></td></tr>'."\n");
1.4 www 518:
519: $r->print('</table>');
520: unless ($nochoose) {
521: $r->print("</form>\n");
522: }
1.22 harris41 523: # ------------------------------------------------------------ Privileges Info
1.55 albertel 524: if (($advanced) && (($ENV{'user.error.msg'}) || ($error))) {
525: $r->print('<hr><h2>Current Privileges</h2>');
1.4 www 526:
1.55 albertel 527: foreach $envkey (sort keys %ENV) {
528: if ($envkey=~/^user\.priv\.$ENV{'request.role'}\./) {
529: my $where=$envkey;
530: $where=~s/^user\.priv\.$ENV{'request.role'}\.//;
531: my $ttype;
532: my $twhere;
533: my ($tdom,$trest,$tsec)=
534: split(/\//,Apache::lonnet::declutter($where));
535: if ($trest) {
536: if ($ENV{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
537: $ttype='Construction Space';
538: $twhere='User: '.$trest.', Domain: '.$tdom;
539: } else {
540: $ttype='Course';
541: $twhere=$ENV{'course.'.$tdom.'_'.$trest.'.description'};
542: if ($tsec) {
543: $twhere.=' (Section/Group: '.$tsec.')';
544: }
545: }
546: } elsif ($tdom) {
547: $ttype='Domain';
548: $twhere=$tdom;
549: } else {
550: $ttype='System';
551: $twhere='/';
552: }
553: $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
554: foreach (sort split(/:/,$ENV{$envkey})) {
555: if ($_) {
556: my ($prv,$restr)=split(/\&/,$_);
557: my $trestr='';
558: if ($restr ne 'F') {
559: my $i;
560: $trestr.=' (';
561: for ($i=0;$i<length($restr);$i++) {
562: $trestr.=
563: Apache::lonnet::plaintext(substr($restr,$i,1));
564: if ($i<length($restr)-1) { $trestr.=', '; }
565: }
566: $trestr.=')';
567: }
568: $r->print('<li>'.
569: Apache::lonnet::plaintext($prv).$trestr.
570: '</li>');
571: }
572: }
573: $r->print('</ul>');
574: }
575: }
1.4 www 576: }
1.66 www 577: $r->print(&Apache::lonnet::getannounce());
1.65 www 578: if ($advanced) {
579: $r->print('<p><small><i>This is LON-CAPA '.
580: $r->dir_config('lonVersion').'</i></small></p>');
581: }
1.1 harris41 582: $r->print("</body></html>\n");
583: return OK;
584: }
585:
586: 1;
587: __END__
1.32 harris41 588:
589: =head1 NAME
590:
591: Apache::lonroles - User Roles Screen
592:
593: =head1 SYNOPSIS
594:
595: Invoked by /etc/httpd/conf/srm.conf:
596:
597: <Location /adm/roles>
598: PerlAccessHandler Apache::lonacc
599: SetHandler perl-script
600: PerlHandler Apache::lonroles
601: ErrorDocument 403 /adm/login
602: ErrorDocument 500 /adm/errorhandler
603: </Location>
1.64 bowersj2 604:
605: =head1 OVERVIEW
606:
607: =head2 Choosing Roles
608:
609: C<lonroles> is a handler that allows a user to switch roles in
610: mid-session. LON-CAPA attempts to work with "No Role Specified", the
611: default role that a user has before selecting a role, as widely as
612: possible, but certain handlers for example need specification which
613: course they should act on, etc. Both in this scenario, and when the
614: handler determines via C<lonnet>'s C<&allowed> function that a certain
615: action is not allowed, C<lonroles> is used as error handler. This
616: allows the user to select another role which may have permission to do
617: what they were trying to do. C<lonroles> can also be accessed via the
618: B<CRS> button in the Remote Control.
619:
620: =begin latex
621:
622: \begin{figure}
623: \begin{center}
624: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
625: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
626: \end{center}
627: \end{figure}
628:
629: =end latex
630:
631: =head2 Role Initialization
632:
633: 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 634:
635: =head1 INTRODUCTION
636:
637: This module enables a user to select what role he wishes to
638: operate under (instructor, student, teaching assistant, course
639: coordinator, etc). These roles are pre-established by the actions
640: of upper-level users.
641:
642: This is part of the LearningOnline Network with CAPA project
643: described at http://www.lon-capa.org.
644:
645: =head1 HANDLER SUBROUTINE
646:
647: This routine is called by Apache and mod_perl.
648:
649: =over 4
650:
651: =item *
652:
653: Roles Initialization (yes/no)
654:
655: =item *
656:
657: Get Error Message from Environment
658:
659: =item *
660:
661: Who is this?
662:
663: =item *
664:
665: Generate Page Output
666:
667: =item *
668:
669: Choice or no choice
670:
671: =item *
672:
673: Table
674:
675: =item *
676:
677: Privileges
678:
679: =back
680:
681: =cut
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