1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.131 2005/11/01 21:59:24 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: $tremark.='<br />'.&mt('Defined by ').$rauthor.
465: &mt(' at ').$rdomain.'.';
466: $trole=$rrole;
467: } else {
468: $trole=Apache::lonnet::plaintext($role);
469: }
470: my $ttype;
471: my $twhere;
472: my ($tdom,$trest,$tsection)=
473: split(/\//,Apache::lonnet::declutter($where));
474: # First, Co-Authorship roles
475: if (($role eq 'ca') || ($role eq 'aa')) {
476: my $home = &Apache::lonnet::homeserver($trest,$tdom);
477: my $allowed=0;
478: my @ids=&Apache::lonnet::current_machine_ids();
479: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
480: if (!$allowed) {
481: $button=0;
482: $switchserver='otherserver='.$home.'&role='.$trolecode;
483: }
484: #next if ($home eq 'no_host');
485: $home = $Apache::lonnet::hostname{$home};
486: $ttype='Construction Space';
487: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
488: ': '.$tdom.'<br />'.
489: ' '.&mt('Server').': '.$home;
490: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
491: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
492: $sortkey=$role."$trest:$tdom";
493: } elsif ($role eq 'au') {
494: # Authors
495: my $home = &Apache::lonnet::homeserver
496: ($env{'user.name'},$env{'user.domain'});
497: my $allowed=0;
498: my @ids=&Apache::lonnet::current_machine_ids();
499: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
500: if (!$allowed) {
501: $button=0;
502: $switchserver=&Apache::lonnet::escape('http://'.
503: $Apache::lonnet::hostname{$home}.
504: '/adm/login?domain='.$env{'user.domain'}.
505: '&username='.$env{'user.name'}.
506: '&firsturl=/priv/'.$env{'user.name'}.'/');
507: }
508: #next if ($home eq 'no_host');
509: $home = $Apache::lonnet::hostname{$home};
510: $ttype='Construction Space';
511: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
512: ': '.$home;
513: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
514: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
515: $sortkey=$role;
516: } elsif ($trest) {
517: $ttype='Course';
518: my $tcourseid=$tdom.'_'.$trest;
519: if ($env{'course.'.$tcourseid.'.description'}) {
520: $twhere=$env{'course.'.$tcourseid.'.description'};
521: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
522: unless ($twhere eq &mt('Currently not available')) {
523: $twhere.=' <font size="-2">'.
524: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
525: '</font>';
526: }
527: } else {
528: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
529: if (%newhash) {
530: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
531: "\0".$envkey;
532: $twhere=$newhash{'description'}.
533: ' <font size="-2">'.
534: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
535: '</font>';
536: } else {
537: $twhere=&mt('Currently not available');
538: $env{'course.'.$tcourseid.'.description'}=$twhere;
539: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
540: }
541: }
542: if ($tsection) {
543: $twhere.='<br />'.&mt('Section/Group').': '.$tsection;
544: }
545:
546: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
547: } elsif ($tdom) {
548: $ttype='Domain';
549: $twhere=$tdom;
550: $sortkey=$role.$twhere;
551: } else {
552: $ttype='System';
553: $twhere=&mt('system wide');
554: $sortkey=$role.$twhere;
555: }
556:
557: $roletext.=&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$ttype,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver);
558: $roletext{$envkey}=$roletext;
559: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
560: $sortrole{$sortkey}=$envkey;
561: $roleclass{$envkey}=$ttype;
562: }
563: }
564: }
565: # No active roles
566: if ($countactive==0) {
567: if ($inrole) {
568: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
569: } else {
570: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
571: }
572: $r->print('</form></body></html>');
573: return OK;
574: # Is there only one choice?
575: } elsif (($countactive==1) && ($env{'request.role'} eq 'cm')) {
576: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
577: '<input type="hidden" name="'.$possiblerole.'" value="1" />');
578: $r->print("</form>\n");
579: $r->rflush();
580: $r->print('<script>document.forms.rolechoice.submit();</script>');
581: $r->print('</body></html>');
582: return OK;
583: }
584: # More than one possible role
585: # ----------------------------------------------------------------------- Table
586: unless (($advanced) || ($nochoose)) {
587: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
588: }
589: $r->print('<br /><table><tr>');
590: unless ($nochoose) { $r->print('<th> </th>'); }
591: $r->print('<th>'.&mt('User Role').'</th><th>'.&mt('Extent').
592: '</th><th>'.&mt('Start').'</th><th>'.&mt('End').'</th><th>'.
593: &mt('Remarks and Calendar Announcements').'</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.'.$_};
612: } elsif ($numdc > 0) {
613: unless ($_ =~/^error\:/) {
614: $output.=&display_cc_role('user.role.'.$_);
615: }
616: }
617: }
618: if ($output) {
619: $r->print("<tr><td align='center' colspan='6'><font face='arial'>".
620: &mt('Recent Roles')."</font></td>");
621: $r->print($output);
622: $r->print("</tr>");
623: $doheaders ++;
624: }
625: }
626:
627: if ($numdc > 0) {
628: $r->print(&coursepick_jscript());
629: $r->print(&Apache::loncommon::coursebrowser_javascript());
630: }
631: foreach my $type ('Construction Space','Course','Domain','System') {
632: my $output;
633: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
634: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
635: $output.=$roletext{$sortrole{$which}};
636: if ($sortrole{$which} =~ m-dc\./(\w+)/-) {
637: if ($dcroles{$1}) {
638: $output .= &allcourses_row($1);
639: }
640: }
641: }
642: }
643: if ($output) {
644: if ($doheaders > 0) {
645: $r->print("<tr>".
646: "<td align='center' colspan='6'><font face='arial'>".&mt($type)."</font></td></tr>");
647: }
648: $r->print($output);
649: }
650: }
651: my $tremark='';
652: my $tfont='#003300';
653: if ($env{'request.role'} eq 'cm') {
654: $r->print('<tr bgcolor="#11CC55">');
655: $tremark=&mt('Currently selected. ');
656: $tfont='#002200';
657: } else {
658: $r->print('<tr bgcolor="#77FF77">');
659: }
660: unless ($nochoose) {
661: if ($env{'request.role'} ne 'cm') {
662: $r->print('<td><input type=submit value="'.
663: &mt('Select').'" name="cm"></td>');
664: } else {
665: $r->print('<td> </td>');
666: }
667: }
668: $r->print('<td colspan="4"><font color="'.$tfont.'">'.&mt('No role specified').
669: '</font></td><td><font color="'.$tfont.'">'.$tremark.
670: ' </font></td></tr>'."\n");
671:
672: $r->print('</table>');
673: unless ($nochoose) {
674: $r->print("</form>\n");
675: }
676: # ------------------------------------------------------------ Privileges Info
677: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
678: $r->print('<hr /><h2>Current Privileges</h2>');
679:
680: foreach $envkey (sort keys %env) {
681: if ($envkey=~/^user\.priv\.$env{'request.role'}\./) {
682: my $where=$envkey;
683: $where=~s/^user\.priv\.$env{'request.role'}\.//;
684: my $ttype;
685: my $twhere;
686: my ($tdom,$trest,$tsec)=
687: split(/\//,Apache::lonnet::declutter($where));
688: if ($trest) {
689: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
690: $ttype='Construction Space';
691: $twhere='User: '.$trest.', Domain: '.$tdom;
692: } else {
693: $ttype='Course';
694: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
695: if ($tsec) {
696: $twhere.=' (Section/Group: '.$tsec.')';
697: }
698: }
699: } elsif ($tdom) {
700: $ttype='Domain';
701: $twhere=$tdom;
702: } else {
703: $ttype='System';
704: $twhere='/';
705: }
706: $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
707: foreach (sort split(/:/,$env{$envkey})) {
708: if ($_) {
709: my ($prv,$restr)=split(/\&/,$_);
710: my $trestr='';
711: if ($restr ne 'F') {
712: my $i;
713: $trestr.=' (';
714: for ($i=0;$i<length($restr);$i++) {
715: $trestr.=
716: Apache::lonnet::plaintext(substr($restr,$i,1));
717: if ($i<length($restr)-1) { $trestr.=', '; }
718: }
719: $trestr.=')';
720: }
721: $r->print('<li>'.
722: Apache::lonnet::plaintext($prv).$trestr.
723: '</li>');
724: }
725: }
726: $r->print('</ul>');
727: }
728: }
729: }
730: $r->print(&Apache::lonnet::getannounce());
731: if ($advanced) {
732: $r->print('<p><small><i>This is LON-CAPA '.
733: $r->dir_config('lonVersion').'</i><br />'.
734: '<a href="/adm/logout">'.&mt('Logout').'</a></small></p>');
735: }
736: $r->print("</body></html>\n");
737: return OK;
738: }
739:
740: sub role_status {
741: my ($rolekey,$then,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
742: my @pwhere = ();
743: if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
744: (undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
745: unless (!defined($$role) || $$role eq '') {
746: $$where=join('.',@pwhere);
747: $$trolecode=$$role.'.'.$$where;
748: ($$tstart,$$tend)=split(/\./,$env{$rolekey});
749: $$tstatus='is';
750: if ($$tstart && $$tstart>$then) {
751: $$tstatus='future';
752: if ($$tstart<$now) { $$tstatus='will'; }
753: }
754: if ($$tend) {
755: if ($$tend<$then) {
756: $$tstatus='expired';
757: } elsif ($$tend<$now) {
758: $$tstatus='will_not';
759: }
760: }
761: }
762: }
763: }
764:
765: sub build_roletext {
766: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$ttype,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver) = @_;
767: my $roletext='<tr bgcolor="'.$tbg.'">';
768: unless ($nochoose) {
769: if (!$button) {
770: if ($switchserver) {
771: $roletext.='<td><a href="/adm/switchserver?'.
772: $switchserver.'">'.&mt('Switch Server').'</a></td>';
773: } else {
774: $roletext.=('<td> </td>');
775: }
776: } elsif ($tstatus eq 'is') {
777: $roletext.=('<td><input type=submit value="'.
778: &mt('Select').'" name="'.
779: $trolecode.'"></td>');
780: } elsif ($tryagain) {
781: $roletext.=
782: '<td><input type=submit value="'.
783: &mt('Try Selecting Again').'" name="'.$trolecode.'"></td>';
784: } elsif ($advanced) {
785: $roletext.=
786: '<td><input type=submit value="'.
787: &mt('Re-Initialize').'" name="'.$trolecode.'"></td>';
788: } else {
789: $roletext.='<td> </td>';
790: }
791: }
792: $tremark.=&Apache::lonannounce::showday(time,1,
793: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
794:
795:
796: $roletext.='<td><font color="'.$tfont.'">'.$trole.
797: '</font></td><td><font color="'.$tfont.'">'.$twhere.
798: '</font></td><td><font color="'.$tfont.'">'.$tpstart.
799: '</font></td><td><font color="'.$tfont.'">'.$tpend.
800: '</font></td><td><font color="'.$tfont.'">'.$tremark.
801: ' </font></td></tr>'."\n";
802: return $roletext;
803: }
804:
805: sub check_privs {
806: my ($cckey,$then,$now) = @_;
807: if ($env{$cckey}) {
808: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
809: &role_status($cckey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
810: unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
811: &set_privileges($1,$2);
812: }
813: } else {
814: &set_privileges($1,$2);
815: }
816: }
817:
818: sub check_fordc {
819: my ($dcroles,$then) = @_;
820: my $numdc = 0;
821: if ($env{'user.adv'}) {
822: foreach my $envkey (sort keys %env) {
823: if ($envkey=~/^user\.role\.dc\.\/(\w+)\/$/) {
824: my $dcdom = $1;
825: my $livedc = 1;
826: my ($tstart,$tend)=split(/\./,$env{$envkey});
827: if ($tstart && $tstart>$then) { $livedc = 0; }
828: if ($tend && $tend <$then) { $livedc = 0; }
829: if ($livedc) {
830: $$dcroles{$dcdom} = $envkey;
831: $numdc++;
832: }
833: }
834: }
835: }
836: return $numdc;
837: }
838:
839: sub courselink {
840: my ($dcdom) = @_;
841: my $courseform=&Apache::loncommon::selectcourse_link
842: ('rolechoice','dccourse_'.$dcdom,'dcdomain_'.$dcdom,'coursedesc_'.$dcdom,$dcdom);
843: my $hiddenitems = '<input type="hidden" name="dcdomain_'.$dcdom.'" value="'.$dcdom.'" />'.
844: '<input type="hidden" name="origdom_'.$dcdom.'" value="'.$dcdom.'" />'.
845: '<input type="hidden" name="dccourse_'.$dcdom.'" value="" />'.
846: '<input type="hidden" name="coursedesc_'.$dcdom.'" value="" />';
847: return $courseform.$hiddenitems;
848: }
849:
850: sub coursepick_jscript {
851: my $verify_script = <<"END";
852: <script>
853: function verifyCoursePick(caller) {
854: var numbutton = getIndex(caller)
855: var pickedCourse = document.rolechoice.elements[numbutton+4].value
856: var pickedDomain = document.rolechoice.elements[numbutton+2].value
857: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
858: if (pickedCourse != '') {
859: if (numbutton != -1) {
860: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
861: document.rolechoice.elements[numbutton+1].name = courseTarget
862: document.rolechoice.submit()
863: }
864: }
865: else {
866: alert("Please use the 'Select Course' link to open a separate pick course window where you may select the course you wish to enter.");
867: }
868: }
869: else {
870: alert("You can only use this screen to select courses in the current domain")
871: }
872: }
873: function getIndex(caller) {
874: for (var i=0;i<document.rolechoice.elements.length;i++) {
875: if (document.rolechoice.elements[i] == caller) {
876: return i;
877: }
878: }
879: return -1;
880: }
881: </script>
882: END
883: return $verify_script;
884: }
885:
886: sub processpick {
887: my $dcdom = shift;
888: my $process_pick = <<"END";
889: <script>
890: function process_pick(dom) {
891: var numbutton = getIndex(dom)
892: var pickedCourse = opener.document.rolechoice.dccourse_$dcdom.value
893: var pickedDomain = opener.document.rolechoice.dcdomain_$dcdom.value
894: if (opener.document.rolechoice.dcdomain_$dcdom.value == opener.document.rolechoice.origdom_$dcdom.value) {
895: if (pickedCourse != '') {
896: if (numbutton != -1) {
897: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
898: opener.document.rolechoice.elements[numbutton+1].name = courseTarget
899: opener.document.rolechoice.submit()
900: }
901: }
902: }
903: }
904:
905: function getIndex(dom) {
906: var callername = 'ccpick_'+dom
907: for (var i=0;i<opener.document.rolechoice.elements.length;i++) {
908: var elemname = opener.document.rolechoice.elements[i].name
909: if (elemname == callername) {
910: return i;
911: }
912: }
913: return -1;
914: }
915: </script>
916: END
917: return $process_pick;
918: }
919:
920: sub display_cc_role {
921: my $rolekey = shift;
922: my $roletext;
923: my $advanced = $env{'user.adv'};
924: my $tryagain = $env{'form.tryagain'};
925: unless ($rolekey =~/^error\:/) {
926: if ($rolekey =~ m-^user\.role.cc\./(\w+)/(\w+)$-) {
927: my $tcourseid = $1.'_'.$2;
928: my $trolecode = 'cc./'.$1.'/'.$2;
929: my $trole = Apache::lonnet::plaintext('cc');
930: my $twhere;
931: my $tbg='#77FF77';
932: my $tfont='#003300';
933: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
934: if (%newhash) {
935: $twhere=$newhash{'description'}.
936: ' <font size="-2">'.
937: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1,$tfont).
938: '</font>';
939: } else {
940: $twhere=&mt('Currently not available');
941: $env{'course.'.$tcourseid.'.description'}=$twhere;
942: }
943: $twhere.="<br />".&mt('Domain').":".$1;
944: $roletext = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$tfont,$trole,&mt('Course'),$twhere,'','','',1,'');
945: }
946: }
947: return $roletext;
948: }
949:
950: sub allcourses_row {
951: my $dcdom = shift;
952: my $ccrole = Apache::lonnet::plaintext('cc');
953: my $selectlink = &courselink($dcdom);
954: my $output = '<tr bgcolor="#99FF99">'.
955: '<td><input type="button" value="'.
956: &mt('Select').'" name="ccpick_'.$dcdom.'"'.
957: 'onClick="verifyCoursePick(this)">'.
958: '<input type="hidden" name="pick_'.$dcdom.'" value="1"></td>'.
959: '<td><font color="#002200">'.
960: $ccrole.'</font></td>'.
961: '<td><font color="#002200">'.&mt('All courses').':<b> '.
962: $selectlink.'</b>'.
963: '<br />'.&mt('Domain').':'.$dcdom.'</font>'.
964: '<td colspan="3"><font color="#002200">'.
965: &mt('Course Coordinator access to all courses in domain').
966: ': <b>'.$dcdom.'</b></font></td></tr>'."\n";
967: return $output;
968: }
969:
970: sub recent_filename {
971: my $area=shift;
972: return 'nohist_recent_'.&Apache::lonnet::escape($area);
973: }
974:
975: sub set_privileges {
976: my ($dcdom,$pickedcourse) = @_;
977: my $area = '/'.$dcdom.'/'.$pickedcourse;
978: my $role = 'cc';
979: my $spec = $role.'.'.$area;
980: my $userroles = &Apache::lonnet::set_arearole($role,$area,'','',$dcdom,$env{'user.name'});
981: my %ccrole = ();
982: &Apache::lonnet::standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
983: my ($author,$adv)= &Apache::lonnet::set_userprivs(\$userroles,\%ccrole);
984: my @newprivs = split/\n/,$userroles;
985: my %newccroles = ();
986: foreach (@newprivs) {
987: my ($key,$val) = split/=/,$_;
988: $newccroles{$key} = $val;
989: }
990: &Apache::lonnet::appenv(%newccroles);
991: &Apache::lonnet::log($env{'user.domain'},
992: $env{'user.name'},
993: $env{'user.home'},
994: "Role ".$role);
995: &Apache::lonnet::appenv(
996: 'request.role' => $role,
997: 'request.role.domain' => $dcdom,
998: 'request.course.sec' => '');
999: my $tadv=0;
1000: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1001: &Apache::lonnet::appenv('request.role.adv' => $tadv);
1002: }
1003:
1004: 1;
1005: __END__
1006:
1007: =head1 NAME
1008:
1009: Apache::lonroles - User Roles Screen
1010:
1011: =head1 SYNOPSIS
1012:
1013: Invoked by /etc/httpd/conf/srm.conf:
1014:
1015: <Location /adm/roles>
1016: PerlAccessHandler Apache::lonacc
1017: SetHandler perl-script
1018: PerlHandler Apache::lonroles
1019: ErrorDocument 403 /adm/login
1020: ErrorDocument 500 /adm/errorhandler
1021: </Location>
1022:
1023: =head1 OVERVIEW
1024:
1025: =head2 Choosing Roles
1026:
1027: C<lonroles> is a handler that allows a user to switch roles in
1028: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1029: default role that a user has before selecting a role, as widely as
1030: possible, but certain handlers for example need specification which
1031: course they should act on, etc. Both in this scenario, and when the
1032: handler determines via C<lonnet>'s C<&allowed> function that a certain
1033: action is not allowed, C<lonroles> is used as error handler. This
1034: allows the user to select another role which may have permission to do
1035: what they were trying to do. C<lonroles> can also be accessed via the
1036: B<CRS> button in the Remote Control.
1037:
1038: =begin latex
1039:
1040: \begin{figure}
1041: \begin{center}
1042: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1043: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1044: \end{center}
1045: \end{figure}
1046:
1047: =end latex
1048:
1049: =head2 Role Initialization
1050:
1051: 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.
1052:
1053: =head1 INTRODUCTION
1054:
1055: This module enables a user to select what role he wishes to
1056: operate under (instructor, student, teaching assistant, course
1057: coordinator, etc). These roles are pre-established by the actions
1058: of upper-level users.
1059:
1060: This is part of the LearningOnline Network with CAPA project
1061: described at http://www.lon-capa.org.
1062:
1063: =head1 HANDLER SUBROUTINE
1064:
1065: This routine is called by Apache and mod_perl.
1066:
1067: =over 4
1068:
1069: =item *
1070:
1071: Roles Initialization (yes/no)
1072:
1073: =item *
1074:
1075: Get Error Message from Environment
1076:
1077: =item *
1078:
1079: Who is this?
1080:
1081: =item *
1082:
1083: Generate Page Output
1084:
1085: =item *
1086:
1087: Choice or no choice
1088:
1089: =item *
1090:
1091: Table
1092:
1093: =item *
1094:
1095: Privileges
1096:
1097: =back
1098:
1099: =cut
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