1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.94.2.2 2004/10/11 18:27:49 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonroles;
31:
32: use strict;
33: use Apache::lonnet();
34: use Apache::lonuserstate();
35: use Apache::Constants qw(:common);
36: use Apache::File();
37: use Apache::lonmenu;
38: use Apache::loncommon;
39: use Apache::lonannounce;
40: use Apache::lonlocal;
41:
42: sub redirect_user {
43: my ($r,$title,$url,$msg) = @_;
44: $msg = $title if (! defined($msg));
45: &Apache::loncommon::content_type($r,'text/html');
46: &Apache::loncommon::no_cache($r);
47: $r->send_http_header;
48: my $swinfo=&Apache::lonmenu::rawconfig();
49: my $bodytag=&Apache::loncommon::bodytag('Switching Role');
50: # Note to style police:
51: # This must only replace the spaces, nothing else, or it bombs elsewhere.
52: $url=~s/ /\%20/g;
53: $r->print(<<ENDREDIR);
54: <head><title>$title</title>
55: <meta HTTP-EQUIV="Refresh" CONTENT="1; url=$url">
56: </head>
57: <html>
58: $bodytag
59: <script>
60: $swinfo
61: </script>
62: <h1>$msg</h1>
63: <a href="$url">Continue</a>
64: </body>
65: </html>
66: ENDREDIR
67: return;
68: }
69:
70: sub handler {
71:
72: my $r = shift;
73:
74: my $now=time;
75: my $then=$ENV{'user.login.time'};
76: my $envkey;
77:
78:
79: # ================================================================== Roles Init
80:
81: if ($ENV{'form.selectrole'}) {
82: if ($ENV{'request.course.id'}) {
83: my %temp=('logout_'.$ENV{'request.course.id'} => time);
84: &Apache::lonnet::put('email_status',\%temp);
85: }
86: &Apache::lonnet::appenv("request.course.id" => '',
87: "request.course.fn" => '',
88: "request.course.uri" => '',
89: "request.course.sec" => '',
90: "request.role" => 'cm',
91: "request.role.adv" => $ENV{'user.adv'},
92: "request.role.domain" => $ENV{'user.domain'});
93: foreach $envkey (keys %ENV) {
94: next if ($envkey!~/^user\.role\./);
95: my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
96: my $where=join('.',@pwhere);
97: my $trolecode=$role.'.'.$where;
98: if ($ENV{'form.'.$trolecode}) {
99: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
100: my $tstatus='is';
101: if ($tstart) {
102: if ($tstart>$then) {
103: $tstatus='future';
104: }
105: }
106: if ($tend) {
107: if ($tend<$then) { $tstatus='expired'; }
108: if ($tend<$now) { $tstatus='will_not'; }
109: }
110: if ($tstatus eq 'is') {
111: $where=~s/^\///;
112: my ($cdom,$cnum,$csec)=split(/\//,$where);
113: # check for keyed access
114: if (($role eq 'st') &&
115: ($ENV{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
116: # who is key authority?
117: my $authdom=$cdom;
118: my $authnum=$cnum;
119: if ($ENV{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
120: ($authnum,$authdom)=
121: split(/\W/,$ENV{'course.'.$cdom.'_'.$cnum.'.keyauth'});
122: }
123: # check with key authority
124: unless (&Apache::lonnet::validate_access_key(
125: $ENV{'environment.key.'.$cdom.'_'.$cnum},
126: $authdom,$authnum)) {
127: # there is no valid key
128: if ($ENV{'form.newkey'}) {
129: # student attempts to register a new key
130: &Apache::loncommon::content_type($r,'text/html');
131: &Apache::loncommon::no_cache($r);
132: $r->send_http_header;
133: my $swinfo=&Apache::lonmenu::rawconfig();
134: my $bodytag=&Apache::loncommon::bodytag
135: ('Verifying Access Key to Unlock this Course');
136: my $buttontext=&mt('Enter Course');
137: my $message=&mt('Successfully registered key');
138: my $assignresult=
139: &Apache::lonnet::assign_access_key(
140: $ENV{'form.newkey'},
141: $authdom,$authnum,
142: $cdom,$cnum,
143: $ENV{'user.domain'},
144: $ENV{'user.name'},
145: 'Assigned from '.$ENV{'REMOTE_ADDR'}.' at '.localtime().' for '.
146: $trolecode);
147: unless ($assignresult eq 'ok') {
148: $assignresult=~s/^error\:\s*//;
149: $message=&mt($assignresult).
150: '<br /><a href="/adm/logout">'.
151: &mt('Logout').'</a>';
152: $buttontext=&mt('Re-Enter Key');
153: }
154: $r->print(<<ENDENTEREDKEY);
155: <head><title>Verifying Course Access Key</title>
156: </head>
157: <html>
158: $bodytag
159: <script>
160: $swinfo
161: </script>
162: <form method="post">
163: <input type="hidden" name="selectrole" value="1" />
164: <input type="hidden" name="$trolecode" value="1" />
165: <font size="+2">$message</font><br />
166: <input type="submit" value="$buttontext" />
167: </form>
168: </body></html>
169: ENDENTEREDKEY
170: return OK;
171: } else {
172: # print form to enter a new key
173: &Apache::loncommon::content_type($r,'text/html');
174: &Apache::loncommon::no_cache($r);
175: $r->send_http_header;
176: my $swinfo=&Apache::lonmenu::rawconfig();
177: my $bodytag=&Apache::loncommon::bodytag
178: ('Enter Access Key to Unlock this Course');
179: $r->print(<<ENDENTERKEY);
180: <head><title>Entering Course Access Key</title>
181: </head>
182: <html>
183: $bodytag
184: <script>
185: $swinfo
186: </script>
187: <form method="post">
188: <input type="hidden" name="selectrole" value="1" />
189: <input type="hidden" name="$trolecode" value="1" />
190: <input type="text" size="20" name="newkey" value="$ENV{'form.newkey'}" />
191: <input type="submit" value="Enter key" />
192: </form>
193: </body></html>
194: ENDENTERKEY
195: return OK;
196: }
197: }
198: }
199: &Apache::lonnet::log($ENV{'user.domain'},
200: $ENV{'user.name'},
201: $ENV{'user.home'},
202: "Role ".$trolecode);
203: my $tadv=0;
204: if (($trolecode!~/^st/) &&
205: ($trolecode!~/^ta/) &&
206: ($trolecode!~/^cm/)) { $tadv=1; }
207: &Apache::lonnet::appenv(
208: 'request.role' => $trolecode,
209: 'request.role.adv' => $tadv,
210: 'request.role.domain' => $cdom,
211: 'request.course.sec' => $csec);
212: my $msg=&mt('Entering course ...');
213:
214: if (($cnum) && ($role ne 'ca')) {
215: my ($furl,$ferr)=
216: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
217: if (($ENV{'form.orgurl'}) &&
218: ($ENV{'form.orgurl'}!~/^\/adm\/flip/)) {
219: my $dest=$ENV{'form.orgurl'};
220: if ( &Apache::lonnet::mod_perl_version() == 2 ) {
221: &Apache::lonnet::cleanenv();
222: }
223: $r->internal_redirect($dest);
224: return OK;
225: } else {
226: unless ($ENV{'request.course.id'}) {
227: &Apache::lonnet::appenv(
228: "request.course.id" => $cdom.'_'.$cnum);
229: $furl='/adm/roles?tryagain=1';
230: $msg=
231: '<h1><font color=red>'.
232: &mt('Could not initialize course at this time.').
233: '</font></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
234: }
235:
236: # Check to see if the user is a CC entering a course
237: # for the first time
238: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
239: if (substr($courseid, 0, 1) eq '/') {
240: $courseid = substr($courseid, 1);
241: }
242: $courseid =~ s/\//_/;
243: if ($role eq 'cc' && $ENV{'course.' . $courseid .
244: '.course.helper.not.run'}) {
245: $furl = "/adm/helper/course.initialization.helper";
246: }
247: #
248: # Send the user to the course they selected
249: &redirect_user($r,&mt('Entering Course'),
250: $furl,$msg);
251: return OK;
252: }
253: }
254: #
255: # Send the user to the construction space they selected
256: if ($role =~ /^(au|ca)$/) {
257: my $redirect_url = '/priv/';
258: if ($role eq 'au') {
259: $redirect_url.=$ENV{'user.name'};
260: } else {
261: $where =~ /\/(.*)$/;
262: $redirect_url .= $1;
263: }
264: $redirect_url .= '/';
265: &redirect_user($r,&mt('Entering Construction Space'),
266: $redirect_url);
267: return OK;
268: }
269: }
270: }
271: }
272: }
273:
274:
275: # =============================================================== No Roles Init
276:
277: &Apache::loncommon::content_type($r,'text/html');
278: &Apache::loncommon::no_cache($r);
279: $r->send_http_header;
280: return OK if $r->header_only;
281:
282: my $swinfo=&Apache::lonmenu::rawconfig();
283: my $bodytag=&Apache::loncommon::bodytag('User Roles');
284: my $helptag='<table><tr><td>'.&Apache::loncommon::help_open_menu('','General Intro','General_Intro','User Roles',1,undef,undef,undef,undef,,&mt("Click here for help")).'</td></td></tr></table>';
285: $r->print(<<ENDHEADER);
286: <html>
287: <head>
288: <title>LON-CAPA User Roles</title>
289: </head>
290: $bodytag
291: $helptag<br />
292: <script>
293: $swinfo
294: window.focus();
295: </script>
296: ENDHEADER
297:
298: # ------------------------------------------ Get Error Message from Environment
299:
300: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$ENV{'user.error.msg'});
301: if ($ENV{'user.error.msg'}) {
302: $r->log_reason(
303: "$msg for $ENV{'user.name'} domain $ENV{'user.domain'} access $priv",$fn);
304: }
305:
306: # ------------------------------------------------- Can this user re-init, etc?
307:
308: my $advanced=$ENV{'user.adv'};
309: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
310: my $tryagain=$ENV{'form.tryagain'};
311:
312: # -------------------------------------------------------- Generate Page Output
313: # --------------------------------------------------------------- Error Header?
314: if ($error) {
315: $r->print("<h1>LON-CAPA Access Control</h1>");
316: $r->print("<hr><pre>Access : ".
317: Apache::lonnet::plaintext($priv)."\n");
318: $r->print("Resource: $fn\n");
319: $r->print("Action : $msg\n</pre><hr>");
320: } else {
321: if ($ENV{'user.error.msg'}) {
322: $r->print(
323: '<h3><font color=red>'.
324: &mt('You need to choose another user role or enter a specific course for this function').'</font></h3>');
325: }
326: }
327: # -------------------------------------------------------- Choice or no choice?
328: if ($nochoose) {
329: if ($advanced) {
330: $r->print("<h2>".&mt('Assigned User Roles')."</h2>\n");
331: } else {
332: $r->print("<h2>".&mt('Sorry ...')."</h2>\n".
333: &mt('This resource might be part of'));
334: if ($ENV{'request.course.id'}) {
335: $r->print(&mt(' another'));
336: } else {
337: $r->print(&mt(' a certain'));
338: }
339: $r->print(&mt(' course.').'</body></html>');
340: return OK;
341: }
342: } else {
343: if ($advanced) {
344: $r->print(&mt("Your home server is ").
345: $Apache::lonnet::hostname{&Apache::lonnet::homeserver
346: ($ENV{'user.name'},$ENV{'user.domain'})}.
347: "<br />\n");
348: $r->print(&mt(
349: "Author and Co-Author roles may not be available on servers other than your home server."));
350: }
351: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
352: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
353: }
354: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
355: $r->print('<input type=hidden name=orgurl value="'.$fn.'">');
356: $r->print('<input type=hidden name=selectrole value=1>');
357: }
358: if ($ENV{'user.adv'}) {
359: $r->print(
360: '<br />'.&mt('Show all roles').': <input type="checkbox" name="showall"');
361: if ($ENV{'form.showall'}) { $r->print(' checked'); }
362: $r->print('><input type=submit value="'.&mt('Display').'">');
363: }
364:
365: my (%roletext,%sortrole,%roleclass);
366: my $countactive=0;
367: my $inrole=0;
368: my $possiblerole='';
369: foreach $envkey (sort keys %ENV) {
370: my $button = 1;
371: my $switchserver='';
372: my $roletext;
373: my $sortkey;
374: if ($envkey=~/^user\.role\./) {
375: my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
376: next if (!defined($role) || $role eq '');
377: my $where=join('.',@pwhere);
378: my $trolecode=$role.'.'.$where;
379: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
380: my $tremark='';
381: my $tstatus='is';
382: my $tpstart=' ';
383: my $tpend=' ';
384: my $tfont='#000000';
385: if ($tstart) {
386: if ($tstart>$then) {
387: $tstatus='future';
388: if ($tstart<$now) { $tstatus='will'; }
389: }
390: $tpstart=&Apache::lonlocal::locallocaltime($tstart);
391: }
392: if ($tend) {
393: if ($tend<$then) {
394: $tstatus='expired';
395: } elsif ($tend<$now) {
396: $tstatus='will_not';
397: }
398: $tpend=&Apache::lonlocal::locallocaltime($tend);
399: }
400: if ($ENV{'request.role'} eq $trolecode) {
401: $tstatus='selected';
402: }
403: my $tbg;
404: if (($tstatus eq 'is') || ($tstatus eq 'selected') ||
405: ($ENV{'form.showall'})) {
406: if ($tstatus eq 'is') {
407: $tbg='#77FF77';
408: $tfont='#003300';
409: $possiblerole=$trolecode;
410: $countactive++;
411: } elsif ($tstatus eq 'future') {
412: $tbg='#FFFF77';
413: $button=0;
414: } elsif ($tstatus eq 'will') {
415: $tbg='#FFAA77';
416: $tremark.=&mt('Active at next login. ');
417: } elsif ($tstatus eq 'expired') {
418: $tbg='#FF7777';
419: $tfont='#330000';
420: $button=0;
421: } elsif ($tstatus eq 'will_not') {
422: $tbg='#AAFF77';
423: $tremark.=&mt('Expired after logout. ');
424: } elsif ($tstatus eq 'selected') {
425: $tbg='#11CC55';
426: $tfont='#002200';
427: $inrole=1;
428: $countactive++;
429: $tremark.=&mt('Currently selected. ');
430: }
431: my $trole;
432: if ($role =~ /^cr\//) {
433: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
434: $tremark.='<br>'.&mt('Defined by ').$rauthor.
435: &mt(' at ').$rdomain.'.';
436: $trole=$rrole;
437: } else {
438: $trole=Apache::lonnet::plaintext($role);
439: }
440: my $ttype;
441: my $twhere;
442: my ($tdom,$trest,$tsection)=
443: split(/\//,Apache::lonnet::declutter($where));
444: # First, Co-Authorship roles
445: if ($role eq 'ca') {
446: my $home = &Apache::lonnet::homeserver($trest,$tdom);
447: my $allowed=0;
448: my @ids=&Apache::lonnet::current_machine_ids();
449: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
450: if (!$allowed) {
451: $button=0;
452: $switchserver=&Apache::lonnet::escape('http://'.
453: $Apache::lonnet::hostname{$home}.
454: '/adm/login?domain='.$ENV{'user.domain'}.
455: '&username='.$ENV{'user.name'}.
456: '&firsturl=/priv/'.$trest.'/');
457: }
458: #next if ($home eq 'no_host');
459: $home = $Apache::lonnet::hostname{$home};
460: $ttype='Construction Space';
461: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
462: ': '.$tdom.'<br />'.
463: ' '.&mt('Server').': '.$home;
464: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
465: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
466: $sortkey=$role."$trest:$tdom";
467: } elsif ($role eq 'au') {
468: # Authors
469: my $home = &Apache::lonnet::homeserver
470: ($ENV{'user.name'},$ENV{'user.domain'});
471: my $allowed=0;
472: my @ids=&Apache::lonnet::current_machine_ids();
473: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
474: if (!$allowed) {
475: $button=0;
476: $switchserver=&Apache::lonnet::escape('http://'.
477: $Apache::lonnet::hostname{$home}.
478: '/adm/login?domain='.$ENV{'user.domain'}.
479: '&username='.$ENV{'user.name'}.
480: '&firsturl=/priv/'.$ENV{'user.name'}.'/');
481: }
482: #next if ($home eq 'no_host');
483: $home = $Apache::lonnet::hostname{$home};
484: $ttype='Construction Space';
485: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
486: ': '.$home;
487: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
488: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$ENV{'user.name'}.'/');
489: $sortkey=$role;
490: } elsif ($trest) {
491: $ttype='Course';
492: if ($tsection) {
493: $ttype.='<br>'.&mt('Section/Group').': '.$tsection;
494: }
495: my $tcourseid=$tdom.'_'.$trest;
496: if ($ENV{'course.'.$tcourseid.'.description'}) {
497: $twhere=$ENV{'course.'.$tcourseid.'.description'};
498: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
499: unless ($twhere eq &mt('Currently not available')) {
500: $twhere.=' <font size="-2">'.
501: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
502: '</font>';
503: }
504: } else {
505: my %newhash=Apache::lonnet::coursedescription
506: ($tcourseid);
507: if (%newhash) {
508: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
509: "\0".$envkey;
510: $twhere=$newhash{'description'}.
511: ' <font size="-2">'.
512: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
513: '</font>';
514: } else {
515: $twhere=&mt('Currently not available');
516: $ENV{'course.'.$tcourseid.'.description'}=$twhere;
517: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
518: }
519: }
520: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
521: } elsif ($tdom) {
522: $ttype='Domain';
523: $twhere=$tdom;
524: $sortkey=$role.$twhere;
525: } else {
526: $ttype='System';
527: $twhere=&mt('system wide');
528: $sortkey=$role.$twhere;
529: }
530:
531: $roletext.='<tr bgcolor='.$tbg.'>';
532: unless ($nochoose) {
533: if (!$button) {
534: if ($switchserver) {
535: $roletext.='<td><a href="/adm/logout?handover='.
536: $switchserver.'">'.&mt('Switch Server').'</a></td>';
537: } else {
538: $roletext.=('<td> </td>');
539: }
540: } elsif ($tstatus eq 'is') {
541: $roletext.=('<td><input type=submit value="'.
542: &mt('Select').'" name="'.
543: $trolecode.'"></td>');
544: } elsif ($tryagain) {
545: $roletext.=
546: '<td><input type=submit value="'.
547: &mt('Try Selecting Again').'" name="'.$trolecode.'"></td>';
548: } elsif ($advanced) {
549: $roletext.=
550: '<td><input type=submit value="'.
551: &mt('Re-Initialize').'" name="'.$trolecode.'"></td>';
552: } else {
553: $roletext.='<td> </td>';
554: }
555: }
556: $tremark.=&Apache::lonannounce::showday(time,1,
557: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
558:
559: $roletext.='<td><font color="'.$tfont.'">'.$trole.
560: '</font></td><td><font color="'.$tfont.'">'.$ttype.
561: '</font></td><td><font color="'.$tfont.'">'.$twhere.
562: '</font></td><td><font color="'.$tfont.'">'.$tpstart.
563: '</font></td><td><font color="'.$tfont.'">'.$tpend.
564: '</font></td><td><font color="'.$tfont.'">'.$tremark.
565: ' </font></td></tr>'."\n";
566: $roletext{$envkey}=$roletext;
567: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
568: $sortrole{$sortkey}=$envkey;
569: $roleclass{$envkey}=$ttype;
570: }
571: }
572: }
573: # No active roles
574: if ($countactive==0) {
575: if ($inrole) {
576: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
577: } else {
578: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
579: }
580: $r->print('</form></body></html>');
581: return OK;
582: # Is there only one choice?
583: } elsif (($countactive==1) && ($ENV{'request.role'} eq 'cm')) {
584: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
585: '<input type="hidden" name="'.$possiblerole.'" value="1" />');
586: $r->print("</form>\n");
587: $r->rflush();
588: $r->print('<script>document.forms.rolechoice.submit();</script>');
589: $r->print('</body></html>');
590: return OK;
591: }
592: # More than one possible role
593: # ----------------------------------------------------------------------- Table
594: unless (($advanced) || ($nochoose)) {
595: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
596: }
597: $r->print('<br /><table><tr>');
598: unless ($nochoose) { $r->print('<th> </th>'); }
599: $r->print('<th>'.&mt('User Role').'</th><th colspan=2>'.&mt('Extent').
600: '</th><th>'.&mt('Start').'</th><th>'.&mt('End').'</th><th>'.
601: &mt('Remark').'</th></tr>'."\n");
602: my $doheaders=-1;
603: foreach my $type ('Construction Space','Course','Domain','System') {
604: my $haverole=0;
605: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
606: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
607: $haverole=1;
608: }
609: }
610: if ($haverole) { $doheaders++; }
611: }
612: foreach my $type ('Construction Space','Course','Domain','System') {
613: my $output;
614: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
615: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
616: $output.=&mt($roletext{$sortrole{$which}});
617: }
618: }
619: if ($output) {
620: if ($doheaders > 0) {
621: $r->print("<tr bgcolor='#BBffBB'>".
622: "<td align='center' colspan='7'>".&mt($type)."</td>");
623: }
624: $r->print($output);
625: }
626: }
627: my $tremark='';
628: my $tfont='#003300';
629: if ($ENV{'request.role'} eq 'cm') {
630: $r->print('<tr bgcolor="#11CC55">');
631: $tremark=&mt('Currently selected. ');
632: $tfont='#002200';
633: } else {
634: $r->print('<tr bgcolor="#77FF77">');
635: }
636: unless ($nochoose) {
637: if ($ENV{'request.role'} ne 'cm') {
638: $r->print('<td><input type=submit value="'.
639: &mt('Select').'" name="cm"></td>');
640: } else {
641: $r->print('<td> </td>');
642: }
643: }
644: $r->print('<td colspan=5><font color="'.$tfont.'">'.&mt('No role specified').
645: '</font></td><td><font color="'.$tfont.'">'.$tremark.
646: ' </font></td></tr>'."\n");
647:
648: $r->print('</table>');
649: unless ($nochoose) {
650: $r->print("</form>\n");
651: }
652: # ------------------------------------------------------------ Privileges Info
653: if (($advanced) && (($ENV{'user.error.msg'}) || ($error))) {
654: $r->print('<hr><h2>Current Privileges</h2>');
655:
656: foreach $envkey (sort keys %ENV) {
657: if ($envkey=~/^user\.priv\.$ENV{'request.role'}\./) {
658: my $where=$envkey;
659: $where=~s/^user\.priv\.$ENV{'request.role'}\.//;
660: my $ttype;
661: my $twhere;
662: my ($tdom,$trest,$tsec)=
663: split(/\//,Apache::lonnet::declutter($where));
664: if ($trest) {
665: if ($ENV{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
666: $ttype='Construction Space';
667: $twhere='User: '.$trest.', Domain: '.$tdom;
668: } else {
669: $ttype='Course';
670: $twhere=$ENV{'course.'.$tdom.'_'.$trest.'.description'};
671: if ($tsec) {
672: $twhere.=' (Section/Group: '.$tsec.')';
673: }
674: }
675: } elsif ($tdom) {
676: $ttype='Domain';
677: $twhere=$tdom;
678: } else {
679: $ttype='System';
680: $twhere='/';
681: }
682: $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
683: foreach (sort split(/:/,$ENV{$envkey})) {
684: if ($_) {
685: my ($prv,$restr)=split(/\&/,$_);
686: my $trestr='';
687: if ($restr ne 'F') {
688: my $i;
689: $trestr.=' (';
690: for ($i=0;$i<length($restr);$i++) {
691: $trestr.=
692: Apache::lonnet::plaintext(substr($restr,$i,1));
693: if ($i<length($restr)-1) { $trestr.=', '; }
694: }
695: $trestr.=')';
696: }
697: $r->print('<li>'.
698: Apache::lonnet::plaintext($prv).$trestr.
699: '</li>');
700: }
701: }
702: $r->print('</ul>');
703: }
704: }
705: }
706: $r->print(&Apache::lonnet::getannounce());
707: if ($advanced) {
708: $r->print('<p><small><i>This is LON-CAPA '.
709: $r->dir_config('lonVersion').'</i><br />'.
710: '<a href="/adm/logout">'.&mt('Logout').'</a></small></p>');
711: }
712: $r->print("</body></html>\n");
713: return OK;
714: }
715:
716: 1;
717: __END__
718:
719: =head1 NAME
720:
721: Apache::lonroles - User Roles Screen
722:
723: =head1 SYNOPSIS
724:
725: Invoked by /etc/httpd/conf/srm.conf:
726:
727: <Location /adm/roles>
728: PerlAccessHandler Apache::lonacc
729: SetHandler perl-script
730: PerlHandler Apache::lonroles
731: ErrorDocument 403 /adm/login
732: ErrorDocument 500 /adm/errorhandler
733: </Location>
734:
735: =head1 OVERVIEW
736:
737: =head2 Choosing Roles
738:
739: C<lonroles> is a handler that allows a user to switch roles in
740: mid-session. LON-CAPA attempts to work with "No Role Specified", the
741: default role that a user has before selecting a role, as widely as
742: possible, but certain handlers for example need specification which
743: course they should act on, etc. Both in this scenario, and when the
744: handler determines via C<lonnet>'s C<&allowed> function that a certain
745: action is not allowed, C<lonroles> is used as error handler. This
746: allows the user to select another role which may have permission to do
747: what they were trying to do. C<lonroles> can also be accessed via the
748: B<CRS> button in the Remote Control.
749:
750: =begin latex
751:
752: \begin{figure}
753: \begin{center}
754: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
755: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
756: \end{center}
757: \end{figure}
758:
759: =end latex
760:
761: =head2 Role Initialization
762:
763: 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.
764:
765: =head1 INTRODUCTION
766:
767: This module enables a user to select what role he wishes to
768: operate under (instructor, student, teaching assistant, course
769: coordinator, etc). These roles are pre-established by the actions
770: of upper-level users.
771:
772: This is part of the LearningOnline Network with CAPA project
773: described at http://www.lon-capa.org.
774:
775: =head1 HANDLER SUBROUTINE
776:
777: This routine is called by Apache and mod_perl.
778:
779: =over 4
780:
781: =item *
782:
783: Roles Initialization (yes/no)
784:
785: =item *
786:
787: Get Error Message from Environment
788:
789: =item *
790:
791: Who is this?
792:
793: =item *
794:
795: Generate Page Output
796:
797: =item *
798:
799: Choice or no choice
800:
801: =item *
802:
803: Table
804:
805: =item *
806:
807: Privileges
808:
809: =back
810:
811: =cut
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