1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.92 2004/05/21 19:16:35 www 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: </body>
64: </html>
65: ENDREDIR
66: return;
67: }
68:
69: sub handler {
70:
71: my $r = shift;
72:
73: my $now=time;
74: my $then=$ENV{'user.login.time'};
75: my $envkey;
76:
77:
78: # ================================================================== Roles Init
79:
80: if ($ENV{'form.selectrole'}) {
81: if ($ENV{'request.course.id'}) {
82: my %temp=('logout_'.$ENV{'request.course.id'} => time);
83: &Apache::lonnet::put('email_status',\%temp);
84: }
85: &Apache::lonnet::appenv("request.course.id" => '',
86: "request.course.fn" => '',
87: "request.course.uri" => '',
88: "request.course.sec" => '',
89: "request.role" => 'cm',
90: "request.role.adv" => $ENV{'user.adv'},
91: "request.role.domain" => $ENV{'user.domain'});
92: foreach $envkey (keys %ENV) {
93: next if ($envkey!~/^user\.role\./);
94: my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
95: my $where=join('.',@pwhere);
96: my $trolecode=$role.'.'.$where;
97: if ($ENV{'form.'.$trolecode}) {
98: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
99: my $tstatus='is';
100: if ($tstart) {
101: if ($tstart>$then) {
102: $tstatus='future';
103: }
104: }
105: if ($tend) {
106: if ($tend<$then) { $tstatus='expired'; }
107: if ($tend<$now) { $tstatus='will_not'; }
108: }
109: if ($tstatus eq 'is') {
110: $where=~s/^\///;
111: my ($cdom,$cnum,$csec)=split(/\//,$where);
112: # check for keyed access
113: if (($role eq 'st') &&
114: ($ENV{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
115: # who is key authority?
116: my $authdom=$cdom;
117: my $authnum=$cnum;
118: if ($ENV{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
119: ($authnum,$authdom)=
120: split(/\W/,$ENV{'course.'.$cdom.'_'.$cnum.'.keyauth'});
121: }
122: # check with key authority
123: unless (&Apache::lonnet::validate_access_key(
124: $ENV{'environment.key.'.$cdom.'_'.$cnum},
125: $authdom,$authnum)) {
126: # there is no valid key
127: if ($ENV{'form.newkey'}) {
128: # student attempts to register a new key
129: &Apache::loncommon::content_type($r,'text/html');
130: &Apache::loncommon::no_cache($r);
131: $r->send_http_header;
132: my $swinfo=&Apache::lonmenu::rawconfig();
133: my $bodytag=&Apache::loncommon::bodytag
134: ('Verifying Access Key to Unlock this Course');
135: my $buttontext=&mt('Enter Course');
136: my $message=&mt('Successfully registered key');
137: my $assignresult=
138: &Apache::lonnet::assign_access_key(
139: $ENV{'form.newkey'},
140: $authdom,$authnum,
141: $cdom,$cnum,
142: $ENV{'user.domain'},
143: $ENV{'user.name'},
144: 'Assigned from '.$ENV{'REMOTE_ADDR'}.' at '.localtime().' for '.
145: $trolecode);
146: unless ($assignresult eq 'ok') {
147: $assignresult=~s/^error\:\s*//;
148: $message=&mt($assignresult).
149: '<br /><a href="/adm/logout">'.
150: &mt('Logout').'</a>';
151: $buttontext=&mt('Re-Enter Key');
152: }
153: $r->print(<<ENDENTEREDKEY);
154: <head><title>Verifying Course Access Key</title>
155: </head>
156: <html>
157: $bodytag
158: <script>
159: $swinfo
160: </script>
161: <form method="post">
162: <input type="hidden" name="selectrole" value="1" />
163: <input type="hidden" name="$trolecode" value="1" />
164: <font size="+2">$message</font><br />
165: <input type="submit" value="$buttontext" />
166: </form>
167: </body></html>
168: ENDENTEREDKEY
169: return OK;
170: } else {
171: # print form to enter a new key
172: &Apache::loncommon::content_type($r,'text/html');
173: &Apache::loncommon::no_cache($r);
174: $r->send_http_header;
175: my $swinfo=&Apache::lonmenu::rawconfig();
176: my $bodytag=&Apache::loncommon::bodytag
177: ('Enter Access Key to Unlock this Course');
178: $r->print(<<ENDENTERKEY);
179: <head><title>Entering Course Access Key</title>
180: </head>
181: <html>
182: $bodytag
183: <script>
184: $swinfo
185: </script>
186: <form method="post">
187: <input type="hidden" name="selectrole" value="1" />
188: <input type="hidden" name="$trolecode" value="1" />
189: <input type="text" size="20" name="newkey" value="$ENV{'form.newkey'}" />
190: <input type="submit" value="Enter key" />
191: </form>
192: </body></html>
193: ENDENTERKEY
194: return OK;
195: }
196: }
197: }
198: &Apache::lonnet::log($ENV{'user.domain'},
199: $ENV{'user.name'},
200: $ENV{'user.home'},
201: "Role ".$trolecode);
202: my $tadv=0;
203: if (($trolecode!~/^st/) &&
204: ($trolecode!~/^ta/) &&
205: ($trolecode!~/^cm/)) { $tadv=1; }
206: &Apache::lonnet::appenv(
207: 'request.role' => $trolecode,
208: 'request.role.adv' => $tadv,
209: 'request.role.domain' => $cdom,
210: 'request.course.sec' => $csec);
211: my $msg=&mt('Entering course ...');
212:
213: if (($cnum) && ($role ne 'ca')) {
214: my ($furl,$ferr)=
215: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
216: if (($ENV{'form.orgurl'}) &&
217: ($ENV{'form.orgurl'}!~/^\/adm\/flip/)) {
218: my $dest=$ENV{'form.orgurl'};
219: if ( &Apache::lonnet::mod_perl_version() == 2 ) {
220: &Apache::lonnet::cleanenv();
221: }
222: $r->internal_redirect($dest);
223: return OK;
224: } else {
225: unless ($ENV{'request.course.id'}) {
226: &Apache::lonnet::appenv(
227: "request.course.id" => $cdom.'_'.$cnum);
228: $furl='/adm/roles?tryagain=1';
229: $msg=
230: '<h1><font color=red>'.
231: &mt('Could not initialize course at this time.').
232: '</font></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
233: }
234:
235: # Check to see if the user is a CC entering a course
236: # for the first time
237: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
238: if (substr($courseid, 0, 1) eq '/') {
239: $courseid = substr($courseid, 1);
240: }
241: $courseid =~ s/\//_/;
242: if ($role eq 'cc' && $ENV{'course.' . $courseid .
243: '.course.helper.not.run'}) {
244: $furl = "/adm/helper/course.initialization.helper";
245: }
246: #
247: # Send the user to the course they selected
248: &redirect_user($r,&mt('Entering Course'),
249: $furl,$msg);
250: return OK;
251: }
252: }
253: #
254: # Send the user to the construction space they selected
255: if ($role =~ /^(au|ca)$/) {
256: my $redirect_url = '/priv/';
257: if ($role eq 'au') {
258: $redirect_url.=$ENV{'user.name'};
259: } else {
260: $where =~ /\/(.*)$/;
261: $redirect_url .= $1;
262: }
263: $redirect_url .= '/';
264: &redirect_user($r,&mt('Entering Construction Space'),
265: $redirect_url);
266: return OK;
267: }
268: }
269: }
270: }
271: }
272:
273:
274: # =============================================================== No Roles Init
275:
276: &Apache::loncommon::content_type($r,'text/html');
277: &Apache::loncommon::no_cache($r);
278: $r->send_http_header;
279: return OK if $r->header_only;
280:
281: my $swinfo=&Apache::lonmenu::rawconfig();
282: my $bodytag=&Apache::loncommon::bodytag('User Roles');
283: my $helptag='<table><tr><td>'.&Apache::loncommon::help_open_topic
284: ("General_Intro",&mt("Click here for help")).'</td><td>'.
285: &Apache::loncommon::help_open_faq(1,&mt('Click here for FAQ')).'</td><td>'.
286: &Apache::loncommon::help_open_bug('',&mt('Click here to report bugs')).'</td></tr></table>';
287: $r->print(<<ENDHEADER);
288: <html>
289: <head>
290: <title>LON-CAPA User Roles</title>
291: </head>
292: $bodytag
293: $helptag<br />
294: <script>
295: $swinfo
296: window.focus();
297: </script>
298: ENDHEADER
299:
300: # ------------------------------------------ Get Error Message from Environment
301:
302: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$ENV{'user.error.msg'});
303: if ($ENV{'user.error.msg'}) {
304: $r->log_reason(
305: "$msg for $ENV{'user.name'} domain $ENV{'user.domain'} access $priv",$fn);
306: }
307:
308: # ------------------------------------------------- Can this user re-init, etc?
309:
310: my $advanced=$ENV{'user.adv'};
311: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
312: my $tryagain=$ENV{'form.tryagain'};
313:
314: # -------------------------------------------------------- Generate Page Output
315: # --------------------------------------------------------------- Error Header?
316: if ($error) {
317: $r->print("<h1>LON-CAPA Access Control</h1>");
318: $r->print("<hr><pre>Access : ".
319: Apache::lonnet::plaintext($priv)."\n");
320: $r->print("Resource: $fn\n");
321: $r->print("Action : $msg\n</pre><hr>");
322: } else {
323: if ($ENV{'user.error.msg'}) {
324: $r->print(
325: '<h3><font color=red>'.
326: &mt('You need to choose another user role or enter a specific course for this function').'</font></h3>');
327: }
328: }
329: # -------------------------------------------------------- Choice or no choice?
330: if ($nochoose) {
331: if ($advanced) {
332: $r->print("<h2>".&mt('Assigned User Roles')."</h2>\n");
333: } else {
334: $r->print("<h2>".&mt('Sorry ...')."</h2>\n".
335: &mt('This resource might be part of'));
336: if ($ENV{'request.course.id'}) {
337: $r->print(&mt(' another'));
338: } else {
339: $r->print(&mt(' a certain'));
340: }
341: $r->print(&mt(' course.').'</body></html>');
342: return OK;
343: }
344: } else {
345: if ($advanced) {
346: $r->print(&mt("Your home server is ").
347: $Apache::lonnet::hostname{&Apache::lonnet::homeserver
348: ($ENV{'user.name'},$ENV{'user.domain'})}.
349: "<br />\n");
350: $r->print(&mt(
351: "Author and Co-Author roles may not be available on servers other than your home server."));
352: }
353: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
354: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
355: }
356: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
357: $r->print('<input type=hidden name=orgurl value="'.$fn.'">');
358: $r->print('<input type=hidden name=selectrole value=1>');
359: }
360: if ($ENV{'user.adv'}) {
361: $r->print(
362: '<br />'.&mt('Show all roles').': <input type="checkbox" name="showall"');
363: if ($ENV{'form.showall'}) { $r->print(' checked'); }
364: $r->print('><input type=submit value="'.&mt('Display').'">');
365: }
366:
367: my (%roletext,%sortrole,%roleclass);
368: my $countactive=0;
369: my $inrole=0;
370: my $possiblerole='';
371: foreach $envkey (sort keys %ENV) {
372: my $button = 1;
373: my $switchserver='';
374: my $roletext;
375: my $sortkey;
376: if ($envkey=~/^user\.role\./) {
377: my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
378: next if (!defined($role) || $role eq '');
379: my $where=join('.',@pwhere);
380: my $trolecode=$role.'.'.$where;
381: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
382: my $tremark='';
383: my $tstatus='is';
384: my $tpstart=' ';
385: my $tpend=' ';
386: my $tfont='#000000';
387: if ($tstart) {
388: if ($tstart>$then) {
389: $tstatus='future';
390: if ($tstart<$now) { $tstatus='will'; }
391: }
392: $tpstart=&Apache::lonlocal::locallocaltime($tstart);
393: }
394: if ($tend) {
395: if ($tend<$then) {
396: $tstatus='expired';
397: } elsif ($tend<$now) {
398: $tstatus='will_not';
399: }
400: $tpend=&Apache::lonlocal::locallocaltime($tend);
401: }
402: if ($ENV{'request.role'} eq $trolecode) {
403: $tstatus='selected';
404: }
405: my $tbg;
406: if (($tstatus eq 'is') || ($tstatus eq 'selected') ||
407: ($ENV{'form.showall'})) {
408: if ($tstatus eq 'is') {
409: $tbg='#77FF77';
410: $tfont='#003300';
411: $possiblerole=$trolecode;
412: $countactive++;
413: } elsif ($tstatus eq 'future') {
414: $tbg='#FFFF77';
415: $button=0;
416: } elsif ($tstatus eq 'will') {
417: $tbg='#FFAA77';
418: $tremark.=&mt('Active at next login. ');
419: } elsif ($tstatus eq 'expired') {
420: $tbg='#FF7777';
421: $tfont='#330000';
422: $button=0;
423: } elsif ($tstatus eq 'will_not') {
424: $tbg='#AAFF77';
425: $tremark.=&mt('Expired after logout. ');
426: } elsif ($tstatus eq 'selected') {
427: $tbg='#11CC55';
428: $tfont='#002200';
429: $inrole=1;
430: $countactive++;
431: $tremark.=&mt('Currently selected. ');
432: }
433: my $trole;
434: if ($role =~ /^cr\//) {
435: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
436: $tremark.='<br>'.&mt('Defined by ').$rauthor.
437: &mt(' at ').$rdomain.'.';
438: $trole=$rrole;
439: } else {
440: $trole=Apache::lonnet::plaintext($role);
441: }
442: my $ttype;
443: my $twhere;
444: my ($tdom,$trest,$tsection)=
445: split(/\//,Apache::lonnet::declutter($where));
446: # First, Co-Authorship roles
447: if ($role eq 'ca') {
448: my $home = &Apache::lonnet::homeserver($trest,$tdom);
449: my $allowed=0;
450: my @ids=&Apache::lonnet::current_machine_ids();
451: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
452: if (!$allowed) {
453: $button=0;
454: $switchserver=&Apache::lonnet::escape('http://'.
455: $Apache::lonnet::hostname{$home}.
456: '/adm/login?domain='.$ENV{'user.domain'}.
457: '&username='.$ENV{'user.name'}.
458: '&firsturl=/priv/'.$trest);
459: }
460: #next if ($home eq 'no_host');
461: $home = $Apache::lonnet::hostname{$home};
462: $ttype='Construction Space';
463: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
464: ': '.$tdom.'<br />'.
465: ' '.&mt('Server').': '.$home;
466: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
467: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
468: $sortkey=$role."$trest:$tdom";
469: } elsif ($role eq 'au') {
470: # Authors
471: my $home = &Apache::lonnet::homeserver
472: ($ENV{'user.name'},$ENV{'user.domain'});
473: my $allowed=0;
474: my @ids=&Apache::lonnet::current_machine_ids();
475: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
476: if (!$allowed) {
477: $button=0;
478: $switchserver=&Apache::lonnet::escape('http://'.
479: $Apache::lonnet::hostname{$home}.
480: '/adm/login?domain='.$ENV{'user.domain'}.
481: '&username='.$ENV{'user.name'}.
482: '&firsturl=/priv/'.$ENV{'user.name'});
483: }
484: #next if ($home eq 'no_host');
485: $home = $Apache::lonnet::hostname{$home};
486: $ttype='Construction Space';
487: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
488: ': '.$home;
489: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
490: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$ENV{'user.name'}.'/');
491: $sortkey=$role;
492: } elsif ($trest) {
493: $ttype='Course';
494: if ($tsection) {
495: $ttype.='<br>'.&mt('Section/Group').': '.$tsection;
496: }
497: my $tcourseid=$tdom.'_'.$trest;
498: if ($ENV{'course.'.$tcourseid.'.description'}) {
499: $twhere=$ENV{'course.'.$tcourseid.'.description'};
500: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
501: unless ($twhere eq &mt('Currently not available')) {
502: $twhere.=' <font size="-2">'.
503: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
504: '</font>';
505: }
506: } else {
507: my %newhash=Apache::lonnet::coursedescription
508: ($tcourseid);
509: if (%newhash) {
510: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
511: "\0".$envkey;
512: $twhere=$newhash{'description'}.
513: ' <font size="-2">'.
514: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
515: '</font>';
516: } else {
517: $twhere=&mt('Currently not available');
518: $ENV{'course.'.$tcourseid.'.description'}=$twhere;
519: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
520: }
521: }
522: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
523: } elsif ($tdom) {
524: $ttype='Domain';
525: $twhere=$tdom;
526: $sortkey=$role.$twhere;
527: } else {
528: $ttype='System';
529: $twhere=&mt('system wide');
530: $sortkey=$role.$twhere;
531: }
532:
533: $roletext.='<tr bgcolor='.$tbg.'>';
534: unless ($nochoose) {
535: if (!$button) {
536: if ($switchserver) {
537: $roletext.='<td><a href="/adm/logout?handover='.
538: $switchserver.'">'.&mt('Switch Server').'</a></td>';
539: } else {
540: $roletext.=('<td> </td>');
541: }
542: } elsif ($tstatus eq 'is') {
543: $roletext.=('<td><input type=submit value="'.
544: &mt('Select').'" name="'.
545: $trolecode.'"></td>');
546: } elsif ($tryagain) {
547: $roletext.=
548: '<td><input type=submit value="'.
549: &mt('Try Selecting Again').'" name="'.$trolecode.'"></td>';
550: } elsif ($advanced) {
551: $roletext.=
552: '<td><input type=submit value="'.
553: &mt('Re-Initialize').'" name="'.$trolecode.'"></td>';
554: } else {
555: $roletext.='<td> </td>';
556: }
557: }
558: $tremark.=&Apache::lonannounce::showday(time,1,
559: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
560:
561: $roletext.='<td><font color="'.$tfont.'">'.$trole.
562: '</font></td><td><font color="'.$tfont.'">'.$ttype.
563: '</font></td><td><font color="'.$tfont.'">'.$twhere.
564: '</font></td><td><font color="'.$tfont.'">'.$tpstart.
565: '</font></td><td><font color="'.$tfont.'">'.$tpend.
566: '</font></td><td><font color="'.$tfont.'">'.$tremark.
567: ' </font></td></tr>'."\n";
568: $roletext{$envkey}=$roletext;
569: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
570: $sortrole{$sortkey}=$envkey;
571: $roleclass{$envkey}=$ttype;
572: }
573: }
574: }
575: # No active roles
576: if ($countactive==0) {
577: if ($inrole) {
578: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
579: } else {
580: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
581: }
582: $r->print('</form></body></html>');
583: return OK;
584: # Is there only one choice?
585: } elsif (($countactive==1) && ($ENV{'request.role'} eq 'cm')) {
586: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
587: '<input type="hidden" name="'.$possiblerole.'" value="1" />');
588: $r->print("</form>\n");
589: $r->rflush();
590: $r->print('<script>document.forms.rolechoice.submit();</script>');
591: $r->print('</body></html>');
592: return OK;
593: }
594: # More than one possible role
595: # ----------------------------------------------------------------------- Table
596: unless (($advanced) || ($nochoose)) {
597: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
598: }
599: $r->print('<br /><table><tr>');
600: unless ($nochoose) { $r->print('<th> </th>'); }
601: $r->print('<th>'.&mt('User Role').'</th><th colspan=2>'.&mt('Extent').
602: '</th><th>'.&mt('Start').'</th><th>'.&mt('End').'</th><th>'.
603: &mt('Remark').'</th></tr>'."\n");
604: my $doheaders=-1;
605: foreach my $type ('Construction Space','Course','Domain','System') {
606: my $haverole=0;
607: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
608: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
609: $haverole=1;
610: }
611: }
612: if ($haverole) { $doheaders++; }
613: }
614: foreach my $type ('Construction Space','Course','Domain','System') {
615: my $output;
616: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
617: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
618: $output.=&mt($roletext{$sortrole{$which}});
619: }
620: }
621: if ($output) {
622: if ($doheaders > 0) {
623: $r->print("<tr bgcolor='#BBffBB'>".
624: "<td align='center' colspan='7'>".&mt($type)."</td>");
625: }
626: $r->print($output);
627: }
628: }
629: my $tremark='';
630: my $tfont='#003300';
631: if ($ENV{'request.role'} eq 'cm') {
632: $r->print('<tr bgcolor="#11CC55">');
633: $tremark=&mt('Currently selected. ');
634: $tfont='#002200';
635: } else {
636: $r->print('<tr bgcolor="#77FF77">');
637: }
638: unless ($nochoose) {
639: if ($ENV{'request.role'} ne 'cm') {
640: $r->print('<td><input type=submit value="'.
641: &mt('Select').'" name="cm"></td>');
642: } else {
643: $r->print('<td> </td>');
644: }
645: }
646: $r->print('<td colspan=5><font color="'.$tfont.'">'.&mt('No role specified').
647: '</font></td><td><font color="'.$tfont.'">'.$tremark.
648: ' </font></td></tr>'."\n");
649:
650: $r->print('</table>');
651: unless ($nochoose) {
652: $r->print("</form>\n");
653: }
654: # ------------------------------------------------------------ Privileges Info
655: if (($advanced) && (($ENV{'user.error.msg'}) || ($error))) {
656: $r->print('<hr><h2>Current Privileges</h2>');
657:
658: foreach $envkey (sort keys %ENV) {
659: if ($envkey=~/^user\.priv\.$ENV{'request.role'}\./) {
660: my $where=$envkey;
661: $where=~s/^user\.priv\.$ENV{'request.role'}\.//;
662: my $ttype;
663: my $twhere;
664: my ($tdom,$trest,$tsec)=
665: split(/\//,Apache::lonnet::declutter($where));
666: if ($trest) {
667: if ($ENV{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
668: $ttype='Construction Space';
669: $twhere='User: '.$trest.', Domain: '.$tdom;
670: } else {
671: $ttype='Course';
672: $twhere=$ENV{'course.'.$tdom.'_'.$trest.'.description'};
673: if ($tsec) {
674: $twhere.=' (Section/Group: '.$tsec.')';
675: }
676: }
677: } elsif ($tdom) {
678: $ttype='Domain';
679: $twhere=$tdom;
680: } else {
681: $ttype='System';
682: $twhere='/';
683: }
684: $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
685: foreach (sort split(/:/,$ENV{$envkey})) {
686: if ($_) {
687: my ($prv,$restr)=split(/\&/,$_);
688: my $trestr='';
689: if ($restr ne 'F') {
690: my $i;
691: $trestr.=' (';
692: for ($i=0;$i<length($restr);$i++) {
693: $trestr.=
694: Apache::lonnet::plaintext(substr($restr,$i,1));
695: if ($i<length($restr)-1) { $trestr.=', '; }
696: }
697: $trestr.=')';
698: }
699: $r->print('<li>'.
700: Apache::lonnet::plaintext($prv).$trestr.
701: '</li>');
702: }
703: }
704: $r->print('</ul>');
705: }
706: }
707: }
708: $r->print(&Apache::lonnet::getannounce());
709: if ($advanced) {
710: $r->print('<p><small><i>This is LON-CAPA '.
711: $r->dir_config('lonVersion').'</i><br />'.
712: '<a href="/adm/logout">'.&mt('Logout').'</a></small></p>');
713: }
714: $r->print("</body></html>\n");
715: return OK;
716: }
717:
718: 1;
719: __END__
720:
721: =head1 NAME
722:
723: Apache::lonroles - User Roles Screen
724:
725: =head1 SYNOPSIS
726:
727: Invoked by /etc/httpd/conf/srm.conf:
728:
729: <Location /adm/roles>
730: PerlAccessHandler Apache::lonacc
731: SetHandler perl-script
732: PerlHandler Apache::lonroles
733: ErrorDocument 403 /adm/login
734: ErrorDocument 500 /adm/errorhandler
735: </Location>
736:
737: =head1 OVERVIEW
738:
739: =head2 Choosing Roles
740:
741: C<lonroles> is a handler that allows a user to switch roles in
742: mid-session. LON-CAPA attempts to work with "No Role Specified", the
743: default role that a user has before selecting a role, as widely as
744: possible, but certain handlers for example need specification which
745: course they should act on, etc. Both in this scenario, and when the
746: handler determines via C<lonnet>'s C<&allowed> function that a certain
747: action is not allowed, C<lonroles> is used as error handler. This
748: allows the user to select another role which may have permission to do
749: what they were trying to do. C<lonroles> can also be accessed via the
750: B<CRS> button in the Remote Control.
751:
752: =begin latex
753:
754: \begin{figure}
755: \begin{center}
756: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
757: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
758: \end{center}
759: \end{figure}
760:
761: =end latex
762:
763: =head2 Role Initialization
764:
765: 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.
766:
767: =head1 INTRODUCTION
768:
769: This module enables a user to select what role he wishes to
770: operate under (instructor, student, teaching assistant, course
771: coordinator, etc). These roles are pre-established by the actions
772: of upper-level users.
773:
774: This is part of the LearningOnline Network with CAPA project
775: described at http://www.lon-capa.org.
776:
777: =head1 HANDLER SUBROUTINE
778:
779: This routine is called by Apache and mod_perl.
780:
781: =over 4
782:
783: =item *
784:
785: Roles Initialization (yes/no)
786:
787: =item *
788:
789: Get Error Message from Environment
790:
791: =item *
792:
793: Who is this?
794:
795: =item *
796:
797: Generate Page Output
798:
799: =item *
800:
801: Choice or no choice
802:
803: =item *
804:
805: Table
806:
807: =item *
808:
809: Privileges
810:
811: =back
812:
813: =cut
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