1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.133 2005/11/08 22:08:12 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::lonhtmlcommon;
40: use Apache::lonannounce;
41: use Apache::lonlocal;
42: use GDBM_File;
43:
44: sub redirect_user {
45: my ($r,$title,$url,$msg,$launch_nav) = @_;
46: $msg = $title if (! defined($msg));
47: &Apache::loncommon::content_type($r,'text/html');
48: &Apache::loncommon::no_cache($r);
49: $r->send_http_header;
50: my $swinfo=&Apache::lonmenu::rawconfig();
51: my $navwindow;
52: if ($launch_nav eq 'on') {
53: $navwindow.=&Apache::lonnavmaps::launch_win('now',undef,undef,
54: ($url eq '/adm/whatsnew'));
55: } else {
56: $navwindow.=&Apache::lonnavmaps::close();
57: }
58: my $bodytag=&Apache::loncommon::bodytag('Switching Role');
59: # Note to style police:
60: # This must only replace the spaces, nothing else, or it bombs elsewhere.
61: $url=~s/ /\%20/g;
62: $r->print(<<ENDREDIR);
63: <head><title>$title</title>
64: <meta HTTP-EQUIV="Refresh" CONTENT="1; url=$url">
65: </head>
66: <html>
67: $bodytag
68: <script type="text/javascript">
69: $swinfo
70: </script>
71: $navwindow
72: <h1>$msg</h1>
73: <a href="$url">Continue</a>
74: </body>
75: </html>
76: ENDREDIR
77: return;
78: }
79:
80: sub handler {
81:
82: my $r = shift;
83:
84: my $now=time;
85: my $then=$env{'user.login.time'};
86: my $envkey;
87: my %dcroles = ();
88: my $numdc = &check_fordc(\%dcroles,$then);
89:
90: # ================================================================== Roles Init
91: if ($env{'form.selectrole'}) {
92: if ($env{'request.course.id'}) {
93: my %temp=('logout_'.$env{'request.course.id'} => time);
94: &Apache::lonnet::put('email_status',\%temp);
95: &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
96: }
97: &Apache::lonnet::appenv("request.course.id" => '',
98: "request.course.fn" => '',
99: "request.course.uri" => '',
100: "request.course.sec" => '',
101: "request.role" => 'cm',
102: "request.role.adv" => $env{'user.adv'},
103: "request.role.domain" => $env{'user.domain'});
104:
105: # Check if user is a DC trying to enter a course and needs privs to be created
106: if ($numdc > 0) {
107: foreach my $envkey (keys %env) {
108: if ($envkey =~ m-^form\.cc\./(\w+)/(\w+)$-) {
109: if ($dcroles{$1}) {
110: my $cckey = 'user.role.cc./'.$1.'/'.$2;
111: &check_privs($cckey,$then,$now);
112: }
113: last;
114: }
115: }
116: }
117:
118: foreach $envkey (keys %env) {
119: next if ($envkey!~/^user\.role\./);
120: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
121: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
122: if ($env{'form.'.$trolecode}) {
123: if ($tstatus eq 'is') {
124: $where=~s/^\///;
125: my ($cdom,$cnum,$csec)=split(/\//,$where);
126: # store role if recent_role list being kept
127: if ($env{'environment.recentroles'}) {
128: &Apache::lonhtmlcommon::store_recent('roles',
129: $trolecode,' ');
130: }
131:
132:
133: # check for keyed access
134: if (($role eq 'st') &&
135: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
136: # who is key authority?
137: my $authdom=$cdom;
138: my $authnum=$cnum;
139: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
140: ($authnum,$authdom)=
141: split(/\W/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
142: }
143: # check with key authority
144: unless (&Apache::lonnet::validate_access_key(
145: $env{'environment.key.'.$cdom.'_'.$cnum},
146: $authdom,$authnum)) {
147: # there is no valid key
148: if ($env{'form.newkey'}) {
149: # student attempts to register a new key
150: &Apache::loncommon::content_type($r,'text/html');
151: &Apache::loncommon::no_cache($r);
152: $r->send_http_header;
153: my $swinfo=&Apache::lonmenu::rawconfig();
154: my $bodytag=&Apache::loncommon::bodytag
155: ('Verifying Access Key to Unlock this Course');
156: my $buttontext=&mt('Enter Course');
157: my $message=&mt('Successfully registered key');
158: my $assignresult=
159: &Apache::lonnet::assign_access_key(
160: $env{'form.newkey'},
161: $authdom,$authnum,
162: $cdom,$cnum,
163: $env{'user.domain'},
164: $env{'user.name'},
165: 'Assigned from '.$ENV{'REMOTE_ADDR'}.' at '.localtime().' for '.
166: $trolecode);
167: unless ($assignresult eq 'ok') {
168: $assignresult=~s/^error\:\s*//;
169: $message=&mt($assignresult).
170: '<br /><a href="/adm/logout">'.
171: &mt('Logout').'</a>';
172: $buttontext=&mt('Re-Enter Key');
173: }
174: $r->print(<<ENDENTEREDKEY);
175: <head><title>Verifying Course Access Key</title>
176: </head>
177: <html>
178: $bodytag
179: <script>
180: $swinfo
181: </script>
182: <form method="post">
183: <input type="hidden" name="selectrole" value="1" />
184: <input type="hidden" name="$trolecode" value="1" />
185: <font size="+2">$message</font><br />
186: <input type="submit" value="$buttontext" />
187: </form>
188: </body></html>
189: ENDENTEREDKEY
190: return OK;
191: } else {
192: # print form to enter a new key
193: &Apache::loncommon::content_type($r,'text/html');
194: &Apache::loncommon::no_cache($r);
195: $r->send_http_header;
196: my $swinfo=&Apache::lonmenu::rawconfig();
197: my $bodytag=&Apache::loncommon::bodytag
198: ('Enter Access Key to Unlock this Course');
199: $r->print(<<ENDENTERKEY);
200: <head><title>Entering Course Access Key</title>
201: </head>
202: <html>
203: $bodytag
204: <script>
205: $swinfo
206: </script>
207: <form method="post">
208: <input type="hidden" name="selectrole" value="1" />
209: <input type="hidden" name="$trolecode" value="1" />
210: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
211: <input type="submit" value="Enter key" />
212: </form>
213: </body></html>
214: ENDENTERKEY
215: return OK;
216: }
217: }
218: }
219: &Apache::lonnet::log($env{'user.domain'},
220: $env{'user.name'},
221: $env{'user.home'},
222: "Role ".$trolecode);
223:
224: &Apache::lonnet::appenv(
225: 'request.role' => $trolecode,
226: 'request.role.domain' => $cdom,
227: 'request.course.sec' => $csec);
228: my $tadv=0;
229: my $msg=&mt('Entering course ...');
230:
231: if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
232: my ($furl,$ferr)=
233: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
234: if (($env{'form.orgurl'}) &&
235: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
236: my $dest=$env{'form.orgurl'};
237: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
238: &Apache::lonnet::appenv('request.role.adv'=>$tadv);
239: $r->internal_redirect($dest);
240: return OK;
241: } else {
242: unless ($env{'request.course.id'}) {
243: &Apache::lonnet::appenv(
244: "request.course.id" => $cdom.'_'.$cnum);
245: $furl='/adm/roles?tryagain=1';
246: $msg=
247: '<h1><font color="red">'.
248: &mt('Could not initialize course at this time.').
249: '</font></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
250: }
251: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
252: &Apache::lonnet::appenv('request.role.adv'=>$tadv);
253:
254: # Check to see if the user is a CC entering a course
255: # for the first time
256: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
257: if (substr($courseid, 0, 1) eq '/') {
258: $courseid = substr($courseid, 1);
259: }
260: $courseid =~ s/\//_/;
261: if ($role eq 'cc' && $env{'course.' . $courseid .
262: '.course.helper.not.run'}) {
263: $furl = "/adm/helper/course.initialization.helper";
264: # Send the user to the course they selected
265: } elsif (($env{'request.course.fn'})
266: && ($role eq 'cc' && ($env{'environment.course_init_display'} ne 'firstres'))) {
267: $msg = &mt('Entering course ....');
268: &redirect_user($r,&mt('New in course'),
269: '/adm/whatsnew',$msg,
270: $env{'environment.remotenavmap'});
271: return OK;
272: }
273: &redirect_user($r,&mt('Entering Course'),
274: $furl,$msg,
275: $env{'environment.remotenavmap'});
276: return OK;
277: }
278: }
279: #
280: # Send the user to the construction space they selected
281: if ($role =~ /^(au|ca|aa)$/) {
282: my $redirect_url = '/priv/';
283: if ($role eq 'au') {
284: $redirect_url.=$env{'user.name'};
285: } else {
286: $where =~ /\/(.*)$/;
287: $redirect_url .= $1;
288: }
289: $redirect_url .= '/';
290: &redirect_user($r,&mt('Entering Construction Space'),
291: $redirect_url);
292: return OK;
293: }
294: if ($role eq 'dc') {
295: my $redirect_url = '/adm/menu/';
296: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
297: $redirect_url);
298: return OK;
299: }
300: }
301: }
302: }
303: }
304:
305:
306: # =============================================================== No Roles Init
307:
308: &Apache::loncommon::content_type($r,'text/html');
309: &Apache::loncommon::no_cache($r);
310: $r->send_http_header;
311: return OK if $r->header_only;
312:
313: my $swinfo=&Apache::lonmenu::rawconfig();
314: my $bodytag=&Apache::loncommon::bodytag('User Roles');
315: 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>';
316: $r->print(<<ENDHEADER);
317: <html>
318: <head>
319: <title>LON-CAPA User Roles</title>
320: </head>
321: $bodytag
322: $helptag<br />
323: <script>
324: $swinfo
325: window.focus();
326: </script>
327: ENDHEADER
328:
329: # ------------------------------------------ Get Error Message from Environment
330:
331: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
332: if ($env{'user.error.msg'}) {
333: $r->log_reason(
334: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
335: }
336:
337: # ------------------------------------------------- Can this user re-init, etc?
338:
339: my $advanced=$env{'user.adv'};
340: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
341: my $tryagain=$env{'form.tryagain'};
342:
343: # -------------------------------------------------------- Generate Page Output
344: # --------------------------------------------------------------- Error Header?
345: if ($error) {
346: $r->print("<h1>LON-CAPA Access Control</h1>");
347: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>Access : ".
348: Apache::lonnet::plaintext($priv)."\n");
349: $r->print("Resource: ".&Apache::lonenc::check_encrypt($fn)."\n");
350: $r->print("Action : $msg\n</pre><hr />");
351: my $url=$fn;
352: my $last;
353: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
354: &GDBM_READER(),0640)) {
355: $last=$hash{'last_known'};
356: untie(%hash);
357: }
358: if ($last) { $fn.='?symb='.&Apache::lonnet::escape($last); }
359:
360: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
361: &Apache::lonenc::check_encrypt($fn));
362: } else {
363: if ($env{'user.error.msg'}) {
364: $r->print(
365: '<h3><font color="red">'.
366: &mt('You need to choose another user role or enter a specific course for this function').'</font></h3>');
367: }
368: }
369: # -------------------------------------------------------- Choice or no choice?
370: if ($nochoose) {
371: if ($advanced) {
372: $r->print("<h2>".&mt('Assigned User Roles')."</h2>\n");
373: } else {
374: $r->print("<h2>".&mt('Sorry ...')."</h2>\n".
375: &mt('This resource might be part of'));
376: if ($env{'request.course.id'}) {
377: $r->print(&mt(' another'));
378: } else {
379: $r->print(&mt(' a certain'));
380: }
381: $r->print(&mt(' course.').'</body></html>');
382: return OK;
383: }
384: } else {
385: if ($advanced) {
386: $r->print(&mt("Your home server is ").
387: $Apache::lonnet::hostname{&Apache::lonnet::homeserver
388: ($env{'user.name'},$env{'user.domain'})}.
389: "<br />\n");
390: $r->print(&mt(
391: "Author and Co-Author roles are not available on servers other than their respective home servers."));
392: }
393: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
394: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
395: }
396: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
397: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
398: $r->print('<input type="hidden" name="selectrole" value="1" />');
399: }
400: if ($env{'user.adv'}) {
401: $r->print(
402: '<br /><label>'.&mt('Show all roles').': <input type="checkbox" name="showall"');
403: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
404: $r->print(' /></label><input type="submit" value="'.&mt('Display').'" />');
405: }
406:
407: my (%roletext,%sortrole,%roleclass);
408: my $countactive=0;
409: my $inrole=0;
410: my $possiblerole='';
411: foreach $envkey (sort keys %env) {
412: my $button = 1;
413: my $switchserver='';
414: my $roletext;
415: my $sortkey;
416: if ($envkey=~/^user\.role\./) {
417: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
418: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
419: next if (!defined($role) || $role eq '');
420: $tremark='';
421: $tpstart=' ';
422: $tpend=' ';
423: $tfont='#000000';
424: if ($tstart) {
425: $tpstart=&Apache::lonlocal::locallocaltime($tstart);
426: }
427: if ($tend) {
428: $tpend=&Apache::lonlocal::locallocaltime($tend);
429: }
430: if ($env{'request.role'} eq $trolecode) {
431: $tstatus='selected';
432: }
433: my $tbg;
434: if (($tstatus eq 'is') || ($tstatus eq 'selected') ||
435: ($env{'form.showall'})) {
436: if ($tstatus eq 'is') {
437: $tbg='#77FF77';
438: $tfont='#003300';
439: $possiblerole=$trolecode;
440: $countactive++;
441: } elsif ($tstatus eq 'future') {
442: $tbg='#FFFF77';
443: $button=0;
444: } elsif ($tstatus eq 'will') {
445: $tbg='#FFAA77';
446: $tremark.=&mt('Active at next login. ');
447: } elsif ($tstatus eq 'expired') {
448: $tbg='#FF7777';
449: $tfont='#330000';
450: $button=0;
451: } elsif ($tstatus eq 'will_not') {
452: $tbg='#AAFF77';
453: $tremark.=&mt('Expired after logout. ');
454: } elsif ($tstatus eq 'selected') {
455: $tbg='#11CC55';
456: $tfont='#002200';
457: $inrole=1;
458: $countactive++;
459: $tremark.=&mt('Currently selected. ');
460: }
461: my $trole;
462: if ($role =~ /^cr\//) {
463: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
464: if ($tremark) { $tremark.='<br />'; }
465: $tremark.=&mt('Defined by ').$rauthor.
466: &mt(' at ').$rdomain.'.';
467: $trole=$rrole;
468: } else {
469: $trole=Apache::lonnet::plaintext($role);
470: }
471: my $ttype;
472: my $twhere;
473: my ($tdom,$trest,$tsection)=
474: split(/\//,Apache::lonnet::declutter($where));
475: # First, Co-Authorship roles
476: if (($role eq 'ca') || ($role eq 'aa')) {
477: my $home = &Apache::lonnet::homeserver($trest,$tdom);
478: my $allowed=0;
479: my @ids=&Apache::lonnet::current_machine_ids();
480: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
481: if (!$allowed) {
482: $button=0;
483: $switchserver='otherserver='.$home.'&role='.$trolecode;
484: }
485: #next if ($home eq 'no_host');
486: $home = $Apache::lonnet::hostname{$home};
487: $ttype='Construction Space';
488: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
489: ': '.$tdom.'<br />'.
490: ' '.&mt('Server').': '.$home;
491: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
492: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
493: $sortkey=$role."$trest:$tdom";
494: } elsif ($role eq 'au') {
495: # Authors
496: my $home = &Apache::lonnet::homeserver
497: ($env{'user.name'},$env{'user.domain'});
498: my $allowed=0;
499: my @ids=&Apache::lonnet::current_machine_ids();
500: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
501: if (!$allowed) {
502: $button=0;
503: $switchserver=&Apache::lonnet::escape('http://'.
504: $Apache::lonnet::hostname{$home}.
505: '/adm/login?domain='.$env{'user.domain'}.
506: '&username='.$env{'user.name'}.
507: '&firsturl=/priv/'.$env{'user.name'}.'/');
508: }
509: #next if ($home eq 'no_host');
510: $home = $Apache::lonnet::hostname{$home};
511: $ttype='Construction Space';
512: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
513: ': '.$home;
514: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
515: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
516: $sortkey=$role;
517: } elsif ($trest) {
518: $ttype='Course';
519: my $tcourseid=$tdom.'_'.$trest;
520: if ($env{'course.'.$tcourseid.'.description'}) {
521: $twhere=$env{'course.'.$tcourseid.'.description'};
522: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
523: unless ($twhere eq &mt('Currently not available')) {
524: $twhere.=' <font size="-2">'.
525: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
526: '</font>';
527: }
528: } else {
529: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
530: if (%newhash) {
531: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
532: "\0".$envkey;
533: $twhere=$newhash{'description'}.
534: ' <font size="-2">'.
535: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
536: '</font>';
537: } else {
538: $twhere=&mt('Currently not available');
539: $env{'course.'.$tcourseid.'.description'}=$twhere;
540: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
541: }
542: }
543: if ($tsection) {
544: $twhere.='<br />'.&mt('Section/Group').': '.$tsection;
545: }
546:
547: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
548: } elsif ($tdom) {
549: $ttype='Domain';
550: $twhere=$tdom;
551: $sortkey=$role.$twhere;
552: } else {
553: $ttype='System';
554: $twhere=&mt('system wide');
555: $sortkey=$role.$twhere;
556: }
557:
558: $roletext.=&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$ttype,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver);
559: $roletext{$envkey}=$roletext;
560: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
561: $sortrole{$sortkey}=$envkey;
562: $roleclass{$envkey}=$ttype;
563: }
564: }
565: }
566: # No active roles
567: if ($countactive==0) {
568: if ($inrole) {
569: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
570: } else {
571: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
572: }
573: $r->print('</form></body></html>');
574: return OK;
575: # Is there only one choice?
576: } elsif (($countactive==1) && ($env{'request.role'} eq 'cm')) {
577: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
578: '<input type="hidden" name="'.$possiblerole.'" value="1" />');
579: $r->print("</form>\n");
580: $r->rflush();
581: $r->print('<script>document.forms.rolechoice.submit();</script>');
582: $r->print('</body></html>');
583: return OK;
584: }
585: # More than one possible role
586: # ----------------------------------------------------------------------- Table
587: unless (($advanced) || ($nochoose)) {
588: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
589: }
590: $r->print('<br /><table><tr>');
591: unless ($nochoose) { $r->print('<th> </th>'); }
592: $r->print('<th>'.&mt('User Role').'</th><th>'.&mt('Extent').
593: '</th><th>'.&mt('Start').'</th><th>'.&mt('End').'</th></tr>'."\n");
594: my $doheaders=-1;
595: foreach my $type ('Domain','Construction Space','Course','System') {
596: my $haverole=0;
597: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
598: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
599: $haverole=1;
600: }
601: }
602: if ($haverole) { $doheaders++; }
603: }
604:
605: if ($env{'environment.recentroles'}) {
606: my %recent_roles =
607: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
608: my $output='';
609: foreach (sort(keys(%recent_roles))) {
610: if (defined($roletext{'user.role.'.$_})) {
611: $output.=$roletext{'user.role.'.$_};
612: if ($_ =~ m-dc\./(\w+)/- && $dcroles{$1}) {
613: $output .= &allcourses_row($1);
614: }
615: } elsif ($numdc > 0) {
616: unless ($_ =~/^error\:/) {
617: $output.=&display_cc_role('user.role.'.$_);
618: }
619: }
620: }
621: if ($output) {
622: $r->print("<tr><td align='center' colspan='5'><font face='arial'>".
623: &mt('Recent Roles')."</font></td>");
624: $r->print($output);
625: $r->print("</tr>");
626: $doheaders ++;
627: }
628: }
629:
630: if ($numdc > 0) {
631: $r->print(&coursepick_jscript());
632: $r->print(&Apache::loncommon::coursebrowser_javascript());
633: }
634: foreach my $type ('Construction Space','Domain','Course','System') {
635: my $output;
636: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
637: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
638: $output.=$roletext{$sortrole{$which}};
639: if ($sortrole{$which} =~ m-dc\./(\w+)/-) {
640: if ($dcroles{$1}) {
641: $output .= &allcourses_row($1);
642: }
643: }
644: }
645: }
646: if ($output) {
647: if ($doheaders > 0) {
648: $r->print("<tr>".
649: "<td align='center' colspan='5'><font face='arial'>".&mt($type)."</font></td></tr>");
650: }
651: $r->print($output);
652: }
653: }
654: my $tremark='';
655: my $tfont='#003300';
656: if ($env{'request.role'} eq 'cm') {
657: $r->print('<tr bgcolor="#11CC55">');
658: $tremark=&mt('Currently selected. ');
659: $tfont='#002200';
660: } else {
661: $r->print('<tr bgcolor="#77FF77">');
662: }
663: unless ($nochoose) {
664: if ($env{'request.role'} ne 'cm') {
665: $r->print('<td><input type=submit value="'.
666: &mt('Select').'" name="cm"></td>');
667: } else {
668: $r->print('<td> </td>');
669: }
670: }
671: $r->print('<td colspan="3"><font color="'.$tfont.'">'.&mt('No role specified').
672: '</font></td><td><font color="'.$tfont.'">'.$tremark.
673: ' </font></td></tr>'."\n");
674:
675: $r->print('</table>');
676: unless ($nochoose) {
677: $r->print("</form>\n");
678: }
679: # ------------------------------------------------------------ Privileges Info
680: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
681: $r->print('<hr /><h2>Current Privileges</h2>');
682:
683: foreach $envkey (sort keys %env) {
684: if ($envkey=~/^user\.priv\.$env{'request.role'}\./) {
685: my $where=$envkey;
686: $where=~s/^user\.priv\.$env{'request.role'}\.//;
687: my $ttype;
688: my $twhere;
689: my ($tdom,$trest,$tsec)=
690: split(/\//,Apache::lonnet::declutter($where));
691: if ($trest) {
692: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
693: $ttype='Construction Space';
694: $twhere='User: '.$trest.', Domain: '.$tdom;
695: } else {
696: $ttype='Course';
697: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
698: if ($tsec) {
699: $twhere.=' (Section/Group: '.$tsec.')';
700: }
701: }
702: } elsif ($tdom) {
703: $ttype='Domain';
704: $twhere=$tdom;
705: } else {
706: $ttype='System';
707: $twhere='/';
708: }
709: $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
710: foreach (sort split(/:/,$env{$envkey})) {
711: if ($_) {
712: my ($prv,$restr)=split(/\&/,$_);
713: my $trestr='';
714: if ($restr ne 'F') {
715: my $i;
716: $trestr.=' (';
717: for ($i=0;$i<length($restr);$i++) {
718: $trestr.=
719: Apache::lonnet::plaintext(substr($restr,$i,1));
720: if ($i<length($restr)-1) { $trestr.=', '; }
721: }
722: $trestr.=')';
723: }
724: $r->print('<li>'.
725: Apache::lonnet::plaintext($prv).$trestr.
726: '</li>');
727: }
728: }
729: $r->print('</ul>');
730: }
731: }
732: }
733: $r->print(&Apache::lonnet::getannounce());
734: if ($advanced) {
735: $r->print('<p><small><i>This is LON-CAPA '.
736: $r->dir_config('lonVersion').'</i><br />'.
737: '<a href="/adm/logout">'.&mt('Logout').'</a></small></p>');
738: }
739: $r->print("</body></html>\n");
740: return OK;
741: }
742:
743: sub role_status {
744: my ($rolekey,$then,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
745: my @pwhere = ();
746: if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
747: (undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
748: unless (!defined($$role) || $$role eq '') {
749: $$where=join('.',@pwhere);
750: $$trolecode=$$role.'.'.$$where;
751: ($$tstart,$$tend)=split(/\./,$env{$rolekey});
752: $$tstatus='is';
753: if ($$tstart && $$tstart>$then) {
754: $$tstatus='future';
755: if ($$tstart<$now) { $$tstatus='will'; }
756: }
757: if ($$tend) {
758: if ($$tend<$then) {
759: $$tstatus='expired';
760: } elsif ($$tend<$now) {
761: $$tstatus='will_not';
762: }
763: }
764: }
765: }
766: }
767:
768: sub build_roletext {
769: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$ttype,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver) = @_;
770: my $roletext='<tr bgcolor="'.$tbg.'">';
771: my $is_dc=($trolecode =~ m/^dc\./);
772: my $rowspan=($is_dc) ? ''
773: : ' rowspan="2" ';
774:
775: unless ($nochoose) {
776: if (!$button) {
777: if ($switchserver) {
778: $roletext.='<td'.$rowspan.'><a href="/adm/switchserver?'.
779: $switchserver.'">'.&mt('Switch Server').'</a></td>';
780: } else {
781: $roletext.=('<td> </td>');
782: }
783: } elsif ($tstatus eq 'is') {
784: $roletext.=('<td'.$rowspan.'><input type=submit value="'.
785: &mt('Select').'" name="'.
786: $trolecode.'"></td>');
787: } elsif ($tryagain) {
788: $roletext.=
789: '<td'.$rowspan.'><input type=submit value="'.
790: &mt('Try Selecting Again').'" name="'.$trolecode.'"></td>';
791: } elsif ($advanced) {
792: $roletext.=
793: '<td'.$rowspan.'><input type=submit value="'.
794: &mt('Re-Initialize').'" name="'.$trolecode.'"></td>';
795: } else {
796: $roletext.='<td'.$rowspan.'> </td>';
797: }
798: }
799: $tremark.=&Apache::lonannounce::showday(time,1,
800: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
801:
802: $roletext.='<td><font color="'.$tfont.'">'.$trole.
803: '</font></td><td><font color="'.$tfont.'">'.$twhere.
804: '</font></td><td><font color="'.$tfont.'">'.$tpstart.
805: '</font></td><td><font color="'.$tfont.'">'.$tpend.
806: '</font></td></tr>';
807: if (!$is_dc) {
808: $roletext.='<tr bgcolor="'.$tbg.'"><td colspan="4"><font color="'.$tfont.'">'.$tremark.
809: ' </font></td></tr><tr><td colspan="5" height="3"></td></tr>'."\n";
810: }
811: return $roletext;
812: }
813:
814: sub check_privs {
815: my ($cckey,$then,$now) = @_;
816: if ($env{$cckey}) {
817: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
818: &role_status($cckey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
819: unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
820: &set_privileges($1,$2);
821: }
822: } else {
823: &set_privileges($1,$2);
824: }
825: }
826:
827: sub check_fordc {
828: my ($dcroles,$then) = @_;
829: my $numdc = 0;
830: if ($env{'user.adv'}) {
831: foreach my $envkey (sort keys %env) {
832: if ($envkey=~/^user\.role\.dc\.\/(\w+)\/$/) {
833: my $dcdom = $1;
834: my $livedc = 1;
835: my ($tstart,$tend)=split(/\./,$env{$envkey});
836: if ($tstart && $tstart>$then) { $livedc = 0; }
837: if ($tend && $tend <$then) { $livedc = 0; }
838: if ($livedc) {
839: $$dcroles{$dcdom} = $envkey;
840: $numdc++;
841: }
842: }
843: }
844: }
845: return $numdc;
846: }
847:
848: sub courselink {
849: my ($dcdom) = @_;
850: my $courseform=&Apache::loncommon::selectcourse_link
851: ('rolechoice','dccourse_'.$dcdom,'dcdomain_'.$dcdom,'coursedesc_'.$dcdom,$dcdom);
852: my $hiddenitems = '<input type="hidden" name="dcdomain_'.$dcdom.'" value="'.$dcdom.'" />'.
853: '<input type="hidden" name="origdom_'.$dcdom.'" value="'.$dcdom.'" />'.
854: '<input type="hidden" name="dccourse_'.$dcdom.'" value="" />'.
855: '<input type="hidden" name="coursedesc_'.$dcdom.'" value="" />';
856: return $courseform.$hiddenitems;
857: }
858:
859: sub coursepick_jscript {
860: my $verify_script = <<"END";
861: <script>
862: function verifyCoursePick(caller) {
863: var numbutton = getIndex(caller)
864: var pickedCourse = document.rolechoice.elements[numbutton+4].value
865: var pickedDomain = document.rolechoice.elements[numbutton+2].value
866: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
867: if (pickedCourse != '') {
868: if (numbutton != -1) {
869: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
870: document.rolechoice.elements[numbutton+1].name = courseTarget
871: document.rolechoice.submit()
872: }
873: }
874: else {
875: alert("Please use the 'Select Course' link to open a separate pick course window where you may select the course you wish to enter.");
876: }
877: }
878: else {
879: alert("You can only use this screen to select courses in the current domain")
880: }
881: }
882: function getIndex(caller) {
883: for (var i=0;i<document.rolechoice.elements.length;i++) {
884: if (document.rolechoice.elements[i] == caller) {
885: return i;
886: }
887: }
888: return -1;
889: }
890: </script>
891: END
892: return $verify_script;
893: }
894:
895: sub processpick {
896: my $dcdom = shift;
897: my $process_pick = <<"END";
898: <script>
899: function process_pick(dom) {
900: var numbutton = getIndex(dom)
901: var pickedCourse = opener.document.rolechoice.dccourse_$dcdom.value
902: var pickedDomain = opener.document.rolechoice.dcdomain_$dcdom.value
903: if (opener.document.rolechoice.dcdomain_$dcdom.value == opener.document.rolechoice.origdom_$dcdom.value) {
904: if (pickedCourse != '') {
905: if (numbutton != -1) {
906: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
907: opener.document.rolechoice.elements[numbutton].name = courseTarget
908: opener.document.rolechoice.submit()
909: }
910: }
911: }
912: }
913:
914: function getIndex(dom) {
915: var callername = 'ccpick_'+dom
916: for (var i=0;i<opener.document.rolechoice.elements.length;i++) {
917: var elemname = opener.document.rolechoice.elements[i].name
918: if (elemname == callername) {
919: return i;
920: }
921: }
922: return -1;
923: }
924: </script>
925: END
926: return $process_pick;
927: }
928:
929: sub display_cc_role {
930: my $rolekey = shift;
931: my $roletext;
932: my $advanced = $env{'user.adv'};
933: my $tryagain = $env{'form.tryagain'};
934: unless ($rolekey =~/^error\:/) {
935: if ($rolekey =~ m-^user\.role.cc\./(\w+)/(\w+)$-) {
936: my $tcourseid = $1.'_'.$2;
937: my $trolecode = 'cc./'.$1.'/'.$2;
938: my $trole = Apache::lonnet::plaintext('cc');
939: my $twhere;
940: my $tbg='#77FF77';
941: my $tfont='#003300';
942: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
943: if (%newhash) {
944: $twhere=$newhash{'description'}.
945: ' <font size="-2">'.
946: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1,$tfont).
947: '</font>';
948: } else {
949: $twhere=&mt('Currently not available');
950: $env{'course.'.$tcourseid.'.description'}=$twhere;
951: }
952: $twhere.="<br />".&mt('Domain').":".$1;
953: $roletext = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$tfont,$trole,&mt('Course'),$twhere,'','','',1,'');
954: }
955: }
956: return $roletext;
957: }
958:
959: sub allcourses_row {
960: my $dcdom = shift;
961: my $ccrole = Apache::lonnet::plaintext('cc');
962: my $selectlink = &courselink($dcdom);
963: my $output = '<tr bgcolor="#77FF77">'.
964: '<input type="hidden" name="ccpick_'.$dcdom.'" />'.
965: '<input type="hidden" name="pick_'.$dcdom.'" value="1" />'.
966: '<td colspan="5">'.
967: '<font color="#002200">'.$ccrole.'</font>'.
968: ' <b>'.$selectlink.'</b>'.
969: ' from '.&mt('Domain').' '.$dcdom.
970: '<tr><td colspan="5" height="3"></td></tr>'."\n";
971: return $output;
972: }
973:
974: sub recent_filename {
975: my $area=shift;
976: return 'nohist_recent_'.&Apache::lonnet::escape($area);
977: }
978:
979: sub set_privileges {
980: my ($dcdom,$pickedcourse) = @_;
981: my $area = '/'.$dcdom.'/'.$pickedcourse;
982: my $role = 'cc';
983: my $spec = $role.'.'.$area;
984: my $userroles = &Apache::lonnet::set_arearole($role,$area,'','',$dcdom,$env{'user.name'});
985: my %ccrole = ();
986: &Apache::lonnet::standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
987: my ($author,$adv)= &Apache::lonnet::set_userprivs(\$userroles,\%ccrole);
988: my @newprivs = split/\n/,$userroles;
989: my %newccroles = ();
990: foreach (@newprivs) {
991: my ($key,$val) = split/=/,$_;
992: $newccroles{$key} = $val;
993: }
994: &Apache::lonnet::appenv(%newccroles);
995: &Apache::lonnet::log($env{'user.domain'},
996: $env{'user.name'},
997: $env{'user.home'},
998: "Role ".$role);
999: &Apache::lonnet::appenv(
1000: 'request.role' => $role,
1001: 'request.role.domain' => $dcdom,
1002: 'request.course.sec' => '');
1003: my $tadv=0;
1004: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1005: &Apache::lonnet::appenv('request.role.adv' => $tadv);
1006: }
1007:
1008: 1;
1009: __END__
1010:
1011: =head1 NAME
1012:
1013: Apache::lonroles - User Roles Screen
1014:
1015: =head1 SYNOPSIS
1016:
1017: Invoked by /etc/httpd/conf/srm.conf:
1018:
1019: <Location /adm/roles>
1020: PerlAccessHandler Apache::lonacc
1021: SetHandler perl-script
1022: PerlHandler Apache::lonroles
1023: ErrorDocument 403 /adm/login
1024: ErrorDocument 500 /adm/errorhandler
1025: </Location>
1026:
1027: =head1 OVERVIEW
1028:
1029: =head2 Choosing Roles
1030:
1031: C<lonroles> is a handler that allows a user to switch roles in
1032: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1033: default role that a user has before selecting a role, as widely as
1034: possible, but certain handlers for example need specification which
1035: course they should act on, etc. Both in this scenario, and when the
1036: handler determines via C<lonnet>'s C<&allowed> function that a certain
1037: action is not allowed, C<lonroles> is used as error handler. This
1038: allows the user to select another role which may have permission to do
1039: what they were trying to do. C<lonroles> can also be accessed via the
1040: B<CRS> button in the Remote Control.
1041:
1042: =begin latex
1043:
1044: \begin{figure}
1045: \begin{center}
1046: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1047: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1048: \end{center}
1049: \end{figure}
1050:
1051: =end latex
1052:
1053: =head2 Role Initialization
1054:
1055: 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.
1056:
1057: =head1 INTRODUCTION
1058:
1059: This module enables a user to select what role he wishes to
1060: operate under (instructor, student, teaching assistant, course
1061: coordinator, etc). These roles are pre-established by the actions
1062: of upper-level users.
1063:
1064: This is part of the LearningOnline Network with CAPA project
1065: described at http://www.lon-capa.org.
1066:
1067: =head1 HANDLER SUBROUTINE
1068:
1069: This routine is called by Apache and mod_perl.
1070:
1071: =over 4
1072:
1073: =item *
1074:
1075: Roles Initialization (yes/no)
1076:
1077: =item *
1078:
1079: Get Error Message from Environment
1080:
1081: =item *
1082:
1083: Who is this?
1084:
1085: =item *
1086:
1087: Generate Page Output
1088:
1089: =item *
1090:
1091: Choice or no choice
1092:
1093: =item *
1094:
1095: Table
1096:
1097: =item *
1098:
1099: Privileges
1100:
1101: =back
1102:
1103: =cut
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