1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.94 2004/07/04 05:53:35 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: </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_menu('','General Intro','General_Intro','User Roles',1,undef,undef,undef,undef,,&mt("Click here for help")).'</td></td></tr></table>';
284: $r->print(<<ENDHEADER);
285: <html>
286: <head>
287: <title>LON-CAPA User Roles</title>
288: </head>
289: $bodytag
290: $helptag<br />
291: <script>
292: $swinfo
293: window.focus();
294: </script>
295: ENDHEADER
296:
297: # ------------------------------------------ Get Error Message from Environment
298:
299: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$ENV{'user.error.msg'});
300: if ($ENV{'user.error.msg'}) {
301: $r->log_reason(
302: "$msg for $ENV{'user.name'} domain $ENV{'user.domain'} access $priv",$fn);
303: }
304:
305: # ------------------------------------------------- Can this user re-init, etc?
306:
307: my $advanced=$ENV{'user.adv'};
308: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
309: my $tryagain=$ENV{'form.tryagain'};
310:
311: # -------------------------------------------------------- Generate Page Output
312: # --------------------------------------------------------------- Error Header?
313: if ($error) {
314: $r->print("<h1>LON-CAPA Access Control</h1>");
315: $r->print("<hr><pre>Access : ".
316: Apache::lonnet::plaintext($priv)."\n");
317: $r->print("Resource: $fn\n");
318: $r->print("Action : $msg\n</pre><hr>");
319: } else {
320: if ($ENV{'user.error.msg'}) {
321: $r->print(
322: '<h3><font color=red>'.
323: &mt('You need to choose another user role or enter a specific course for this function').'</font></h3>');
324: }
325: }
326: # -------------------------------------------------------- Choice or no choice?
327: if ($nochoose) {
328: if ($advanced) {
329: $r->print("<h2>".&mt('Assigned User Roles')."</h2>\n");
330: } else {
331: $r->print("<h2>".&mt('Sorry ...')."</h2>\n".
332: &mt('This resource might be part of'));
333: if ($ENV{'request.course.id'}) {
334: $r->print(&mt(' another'));
335: } else {
336: $r->print(&mt(' a certain'));
337: }
338: $r->print(&mt(' course.').'</body></html>');
339: return OK;
340: }
341: } else {
342: if ($advanced) {
343: $r->print(&mt("Your home server is ").
344: $Apache::lonnet::hostname{&Apache::lonnet::homeserver
345: ($ENV{'user.name'},$ENV{'user.domain'})}.
346: "<br />\n");
347: $r->print(&mt(
348: "Author and Co-Author roles may not be available on servers other than your home server."));
349: }
350: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
351: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
352: }
353: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
354: $r->print('<input type=hidden name=orgurl value="'.$fn.'">');
355: $r->print('<input type=hidden name=selectrole value=1>');
356: }
357: if ($ENV{'user.adv'}) {
358: $r->print(
359: '<br />'.&mt('Show all roles').': <input type="checkbox" name="showall"');
360: if ($ENV{'form.showall'}) { $r->print(' checked'); }
361: $r->print('><input type=submit value="'.&mt('Display').'">');
362: }
363:
364: my (%roletext,%sortrole,%roleclass);
365: my $countactive=0;
366: my $inrole=0;
367: my $possiblerole='';
368: foreach $envkey (sort keys %ENV) {
369: my $button = 1;
370: my $switchserver='';
371: my $roletext;
372: my $sortkey;
373: if ($envkey=~/^user\.role\./) {
374: my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
375: next if (!defined($role) || $role eq '');
376: my $where=join('.',@pwhere);
377: my $trolecode=$role.'.'.$where;
378: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
379: my $tremark='';
380: my $tstatus='is';
381: my $tpstart=' ';
382: my $tpend=' ';
383: my $tfont='#000000';
384: if ($tstart) {
385: if ($tstart>$then) {
386: $tstatus='future';
387: if ($tstart<$now) { $tstatus='will'; }
388: }
389: $tpstart=&Apache::lonlocal::locallocaltime($tstart);
390: }
391: if ($tend) {
392: if ($tend<$then) {
393: $tstatus='expired';
394: } elsif ($tend<$now) {
395: $tstatus='will_not';
396: }
397: $tpend=&Apache::lonlocal::locallocaltime($tend);
398: }
399: if ($ENV{'request.role'} eq $trolecode) {
400: $tstatus='selected';
401: }
402: my $tbg;
403: if (($tstatus eq 'is') || ($tstatus eq 'selected') ||
404: ($ENV{'form.showall'})) {
405: if ($tstatus eq 'is') {
406: $tbg='#77FF77';
407: $tfont='#003300';
408: $possiblerole=$trolecode;
409: $countactive++;
410: } elsif ($tstatus eq 'future') {
411: $tbg='#FFFF77';
412: $button=0;
413: } elsif ($tstatus eq 'will') {
414: $tbg='#FFAA77';
415: $tremark.=&mt('Active at next login. ');
416: } elsif ($tstatus eq 'expired') {
417: $tbg='#FF7777';
418: $tfont='#330000';
419: $button=0;
420: } elsif ($tstatus eq 'will_not') {
421: $tbg='#AAFF77';
422: $tremark.=&mt('Expired after logout. ');
423: } elsif ($tstatus eq 'selected') {
424: $tbg='#11CC55';
425: $tfont='#002200';
426: $inrole=1;
427: $countactive++;
428: $tremark.=&mt('Currently selected. ');
429: }
430: my $trole;
431: if ($role =~ /^cr\//) {
432: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
433: $tremark.='<br>'.&mt('Defined by ').$rauthor.
434: &mt(' at ').$rdomain.'.';
435: $trole=$rrole;
436: } else {
437: $trole=Apache::lonnet::plaintext($role);
438: }
439: my $ttype;
440: my $twhere;
441: my ($tdom,$trest,$tsection)=
442: split(/\//,Apache::lonnet::declutter($where));
443: # First, Co-Authorship roles
444: if ($role eq 'ca') {
445: my $home = &Apache::lonnet::homeserver($trest,$tdom);
446: my $allowed=0;
447: my @ids=&Apache::lonnet::current_machine_ids();
448: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
449: if (!$allowed) {
450: $button=0;
451: $switchserver=&Apache::lonnet::escape('http://'.
452: $Apache::lonnet::hostname{$home}.
453: '/adm/login?domain='.$ENV{'user.domain'}.
454: '&username='.$ENV{'user.name'}.
455: '&firsturl=/priv/'.$trest);
456: }
457: #next if ($home eq 'no_host');
458: $home = $Apache::lonnet::hostname{$home};
459: $ttype='Construction Space';
460: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
461: ': '.$tdom.'<br />'.
462: ' '.&mt('Server').': '.$home;
463: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
464: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
465: $sortkey=$role."$trest:$tdom";
466: } elsif ($role eq 'au') {
467: # Authors
468: my $home = &Apache::lonnet::homeserver
469: ($ENV{'user.name'},$ENV{'user.domain'});
470: my $allowed=0;
471: my @ids=&Apache::lonnet::current_machine_ids();
472: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
473: if (!$allowed) {
474: $button=0;
475: $switchserver=&Apache::lonnet::escape('http://'.
476: $Apache::lonnet::hostname{$home}.
477: '/adm/login?domain='.$ENV{'user.domain'}.
478: '&username='.$ENV{'user.name'}.
479: '&firsturl=/priv/'.$ENV{'user.name'});
480: }
481: #next if ($home eq 'no_host');
482: $home = $Apache::lonnet::hostname{$home};
483: $ttype='Construction Space';
484: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
485: ': '.$home;
486: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
487: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$ENV{'user.name'}.'/');
488: $sortkey=$role;
489: } elsif ($trest) {
490: $ttype='Course';
491: if ($tsection) {
492: $ttype.='<br>'.&mt('Section/Group').': '.$tsection;
493: }
494: my $tcourseid=$tdom.'_'.$trest;
495: if ($ENV{'course.'.$tcourseid.'.description'}) {
496: $twhere=$ENV{'course.'.$tcourseid.'.description'};
497: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
498: unless ($twhere eq &mt('Currently not available')) {
499: $twhere.=' <font size="-2">'.
500: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
501: '</font>';
502: }
503: } else {
504: my %newhash=Apache::lonnet::coursedescription
505: ($tcourseid);
506: if (%newhash) {
507: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
508: "\0".$envkey;
509: $twhere=$newhash{'description'}.
510: ' <font size="-2">'.
511: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
512: '</font>';
513: } else {
514: $twhere=&mt('Currently not available');
515: $ENV{'course.'.$tcourseid.'.description'}=$twhere;
516: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
517: }
518: }
519: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
520: } elsif ($tdom) {
521: $ttype='Domain';
522: $twhere=$tdom;
523: $sortkey=$role.$twhere;
524: } else {
525: $ttype='System';
526: $twhere=&mt('system wide');
527: $sortkey=$role.$twhere;
528: }
529:
530: $roletext.='<tr bgcolor='.$tbg.'>';
531: unless ($nochoose) {
532: if (!$button) {
533: if ($switchserver) {
534: $roletext.='<td><a href="/adm/logout?handover='.
535: $switchserver.'">'.&mt('Switch Server').'</a></td>';
536: } else {
537: $roletext.=('<td> </td>');
538: }
539: } elsif ($tstatus eq 'is') {
540: $roletext.=('<td><input type=submit value="'.
541: &mt('Select').'" name="'.
542: $trolecode.'"></td>');
543: } elsif ($tryagain) {
544: $roletext.=
545: '<td><input type=submit value="'.
546: &mt('Try Selecting Again').'" name="'.$trolecode.'"></td>';
547: } elsif ($advanced) {
548: $roletext.=
549: '<td><input type=submit value="'.
550: &mt('Re-Initialize').'" name="'.$trolecode.'"></td>';
551: } else {
552: $roletext.='<td> </td>';
553: }
554: }
555: $tremark.=&Apache::lonannounce::showday(time,1,
556: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
557:
558: $roletext.='<td><font color="'.$tfont.'">'.$trole.
559: '</font></td><td><font color="'.$tfont.'">'.$ttype.
560: '</font></td><td><font color="'.$tfont.'">'.$twhere.
561: '</font></td><td><font color="'.$tfont.'">'.$tpstart.
562: '</font></td><td><font color="'.$tfont.'">'.$tpend.
563: '</font></td><td><font color="'.$tfont.'">'.$tremark.
564: ' </font></td></tr>'."\n";
565: $roletext{$envkey}=$roletext;
566: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
567: $sortrole{$sortkey}=$envkey;
568: $roleclass{$envkey}=$ttype;
569: }
570: }
571: }
572: # No active roles
573: if ($countactive==0) {
574: if ($inrole) {
575: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
576: } else {
577: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
578: }
579: $r->print('</form></body></html>');
580: return OK;
581: # Is there only one choice?
582: } elsif (($countactive==1) && ($ENV{'request.role'} eq 'cm')) {
583: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
584: '<input type="hidden" name="'.$possiblerole.'" value="1" />');
585: $r->print("</form>\n");
586: $r->rflush();
587: $r->print('<script>document.forms.rolechoice.submit();</script>');
588: $r->print('</body></html>');
589: return OK;
590: }
591: # More than one possible role
592: # ----------------------------------------------------------------------- Table
593: unless (($advanced) || ($nochoose)) {
594: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
595: }
596: $r->print('<br /><table><tr>');
597: unless ($nochoose) { $r->print('<th> </th>'); }
598: $r->print('<th>'.&mt('User Role').'</th><th colspan=2>'.&mt('Extent').
599: '</th><th>'.&mt('Start').'</th><th>'.&mt('End').'</th><th>'.
600: &mt('Remark').'</th></tr>'."\n");
601: my $doheaders=-1;
602: foreach my $type ('Construction Space','Course','Domain','System') {
603: my $haverole=0;
604: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
605: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
606: $haverole=1;
607: }
608: }
609: if ($haverole) { $doheaders++; }
610: }
611: foreach my $type ('Construction Space','Course','Domain','System') {
612: my $output;
613: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
614: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
615: $output.=&mt($roletext{$sortrole{$which}});
616: }
617: }
618: if ($output) {
619: if ($doheaders > 0) {
620: $r->print("<tr bgcolor='#BBffBB'>".
621: "<td align='center' colspan='7'>".&mt($type)."</td>");
622: }
623: $r->print($output);
624: }
625: }
626: my $tremark='';
627: my $tfont='#003300';
628: if ($ENV{'request.role'} eq 'cm') {
629: $r->print('<tr bgcolor="#11CC55">');
630: $tremark=&mt('Currently selected. ');
631: $tfont='#002200';
632: } else {
633: $r->print('<tr bgcolor="#77FF77">');
634: }
635: unless ($nochoose) {
636: if ($ENV{'request.role'} ne 'cm') {
637: $r->print('<td><input type=submit value="'.
638: &mt('Select').'" name="cm"></td>');
639: } else {
640: $r->print('<td> </td>');
641: }
642: }
643: $r->print('<td colspan=5><font color="'.$tfont.'">'.&mt('No role specified').
644: '</font></td><td><font color="'.$tfont.'">'.$tremark.
645: ' </font></td></tr>'."\n");
646:
647: $r->print('</table>');
648: unless ($nochoose) {
649: $r->print("</form>\n");
650: }
651: # ------------------------------------------------------------ Privileges Info
652: if (($advanced) && (($ENV{'user.error.msg'}) || ($error))) {
653: $r->print('<hr><h2>Current Privileges</h2>');
654:
655: foreach $envkey (sort keys %ENV) {
656: if ($envkey=~/^user\.priv\.$ENV{'request.role'}\./) {
657: my $where=$envkey;
658: $where=~s/^user\.priv\.$ENV{'request.role'}\.//;
659: my $ttype;
660: my $twhere;
661: my ($tdom,$trest,$tsec)=
662: split(/\//,Apache::lonnet::declutter($where));
663: if ($trest) {
664: if ($ENV{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
665: $ttype='Construction Space';
666: $twhere='User: '.$trest.', Domain: '.$tdom;
667: } else {
668: $ttype='Course';
669: $twhere=$ENV{'course.'.$tdom.'_'.$trest.'.description'};
670: if ($tsec) {
671: $twhere.=' (Section/Group: '.$tsec.')';
672: }
673: }
674: } elsif ($tdom) {
675: $ttype='Domain';
676: $twhere=$tdom;
677: } else {
678: $ttype='System';
679: $twhere='/';
680: }
681: $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
682: foreach (sort split(/:/,$ENV{$envkey})) {
683: if ($_) {
684: my ($prv,$restr)=split(/\&/,$_);
685: my $trestr='';
686: if ($restr ne 'F') {
687: my $i;
688: $trestr.=' (';
689: for ($i=0;$i<length($restr);$i++) {
690: $trestr.=
691: Apache::lonnet::plaintext(substr($restr,$i,1));
692: if ($i<length($restr)-1) { $trestr.=', '; }
693: }
694: $trestr.=')';
695: }
696: $r->print('<li>'.
697: Apache::lonnet::plaintext($prv).$trestr.
698: '</li>');
699: }
700: }
701: $r->print('</ul>');
702: }
703: }
704: }
705: $r->print(&Apache::lonnet::getannounce());
706: if ($advanced) {
707: $r->print('<p><small><i>This is LON-CAPA '.
708: $r->dir_config('lonVersion').'</i><br />'.
709: '<a href="/adm/logout">'.&mt('Logout').'</a></small></p>');
710: }
711: $r->print("</body></html>\n");
712: return OK;
713: }
714:
715: 1;
716: __END__
717:
718: =head1 NAME
719:
720: Apache::lonroles - User Roles Screen
721:
722: =head1 SYNOPSIS
723:
724: Invoked by /etc/httpd/conf/srm.conf:
725:
726: <Location /adm/roles>
727: PerlAccessHandler Apache::lonacc
728: SetHandler perl-script
729: PerlHandler Apache::lonroles
730: ErrorDocument 403 /adm/login
731: ErrorDocument 500 /adm/errorhandler
732: </Location>
733:
734: =head1 OVERVIEW
735:
736: =head2 Choosing Roles
737:
738: C<lonroles> is a handler that allows a user to switch roles in
739: mid-session. LON-CAPA attempts to work with "No Role Specified", the
740: default role that a user has before selecting a role, as widely as
741: possible, but certain handlers for example need specification which
742: course they should act on, etc. Both in this scenario, and when the
743: handler determines via C<lonnet>'s C<&allowed> function that a certain
744: action is not allowed, C<lonroles> is used as error handler. This
745: allows the user to select another role which may have permission to do
746: what they were trying to do. C<lonroles> can also be accessed via the
747: B<CRS> button in the Remote Control.
748:
749: =begin latex
750:
751: \begin{figure}
752: \begin{center}
753: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
754: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
755: \end{center}
756: \end{figure}
757:
758: =end latex
759:
760: =head2 Role Initialization
761:
762: 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.
763:
764: =head1 INTRODUCTION
765:
766: This module enables a user to select what role he wishes to
767: operate under (instructor, student, teaching assistant, course
768: coordinator, etc). These roles are pre-established by the actions
769: of upper-level users.
770:
771: This is part of the LearningOnline Network with CAPA project
772: described at http://www.lon-capa.org.
773:
774: =head1 HANDLER SUBROUTINE
775:
776: This routine is called by Apache and mod_perl.
777:
778: =over 4
779:
780: =item *
781:
782: Roles Initialization (yes/no)
783:
784: =item *
785:
786: Get Error Message from Environment
787:
788: =item *
789:
790: Who is this?
791:
792: =item *
793:
794: Generate Page Output
795:
796: =item *
797:
798: Choice or no choice
799:
800: =item *
801:
802: Table
803:
804: =item *
805:
806: Privileges
807:
808: =back
809:
810: =cut
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