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