1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.190 2008/05/14 22:26:48 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonroles;
31:
32: use strict;
33: use Apache::lonnet;
34: use Apache::lonuserstate();
35: use Apache::Constants qw(:common);
36: use Apache::File();
37: use Apache::lonmenu;
38: use Apache::loncommon;
39: use Apache::lonhtmlcommon;
40: use Apache::lonannounce;
41: use Apache::lonlocal;
42: use Apache::lonpageflip();
43: use Apache::lonnavdisplay();
44: use GDBM_File;
45: use LONCAPA qw(:DEFAULT :match);
46:
47:
48: sub redirect_user {
49: my ($r,$title,$url,$msg,$launch_nav) = @_;
50: $msg = $title if (! defined($msg));
51: &Apache::loncommon::content_type($r,'text/html');
52: &Apache::loncommon::no_cache($r);
53: $r->send_http_header;
54: my $swinfo=&Apache::lonmenu::rawconfig();
55: my $navwindow;
56: if ($launch_nav eq 'on') {
57: $navwindow.=&Apache::lonnavdisplay::launch_win('now',undef,undef,
58: ($url =~ m-^/adm/whatsnew-));
59: } else {
60: $navwindow.=&Apache::lonnavmaps::close();
61: }
62: my $start_page = &Apache::loncommon::start_page('Switching Role',undef,
63: {'redirect' => [1,$url],});
64: my $end_page = &Apache::loncommon::end_page();
65:
66: # Note to style police:
67: # This must only replace the spaces, nothing else, or it bombs elsewhere.
68: $url=~s/ /\%20/g;
69: $r->print(<<ENDREDIR);
70: $start_page
71: <script type="text/javascript">
72: $swinfo
73: </script>
74: $navwindow
75: <h1>$msg</h1>
76: $end_page
77: ENDREDIR
78: return;
79: }
80:
81: sub error_page {
82: my ($r,$error,$dest)=@_;
83: &Apache::loncommon::content_type($r,'text/html');
84: &Apache::loncommon::no_cache($r);
85: $r->send_http_header;
86: return OK if $r->header_only;
87: $r->print(&Apache::loncommon::start_page('Problems during Course Initialization').
88: '<script type="text/javascript">'.
89: &Apache::lonmenu::rawconfig().'</script>'.
90: '<p>'.&mt('The following problems occurred:').
91: $error.
92: '</p><br /><a href="'.$dest.'">'.&mt('Continue').'</a>'.
93: &Apache::loncommon::end_page());
94: }
95:
96: sub handler {
97:
98: my $r = shift;
99:
100: my $now=time;
101: my $then=$env{'user.login.time'};
102: my $envkey;
103: my %dcroles = ();
104: my $numdc = &check_fordc(\%dcroles,$then);
105: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
106:
107: # ================================================================== Roles Init
108: if ($env{'form.selectrole'}) {
109:
110: my $locknum=&Apache::lonnet::get_locks();
111: if ($locknum) { return 409; }
112:
113: if ($env{'form.newrole'}) {
114: $env{'form.'.$env{'form.newrole'}}=1;
115: }
116: if ($env{'request.course.id'}) {
117: # Check if user is CC trying to select a course role
118: if ($env{'form.switchrole'}) {
119: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
120: &adhoc_course_role($then);
121: }
122: }
123: my %temp=('logout_'.$env{'request.course.id'} => time);
124: &Apache::lonnet::put('email_status',\%temp);
125: &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
126: }
127: &Apache::lonnet::appenv({"request.course.id" => '',
128: "request.course.fn" => '',
129: "request.course.uri" => '',
130: "request.course.sec" => '',
131: "request.role" => 'cm',
132: "request.role.adv" => $env{'user.adv'},
133: "request.role.domain" => $env{'user.domain'}});
134: # Check if user is a DC trying to enter a course or author space and needs privs to be created
135: if ($numdc > 0) {
136: foreach my $envkey (keys %env) {
137: # Is this an ad-hoc CC-role?
138: if (my ($domain,$coursenum) =
139: ($envkey =~ m-^form\.cc\./($match_domain)/($match_courseid)$-)) {
140: # See if that is even allowed
141: my %crsenv=&Apache::lonnet::get('environment',['internal.courseowner'],$domain,$coursenum);
142: # First find course owner
143: my ($owneruser,$ownerdomain)=split(/\:/,$crsenv{'internal.courseowner'});
144: # Check if course owner blocked cc-access
145: if (($owneruser) && ($ownerdomain)) {
146: my %blocked=&Apache::lonnet::get('environment',['domcoord.cc'],$ownerdomain,$owneruser);
147: if ($blocked{'domcoord.cc'} eq 'blocked') {
148: $env{'user.error.msg'}=':::1:Course owner '.$owneruser.' in domain '.$ownerdomain.' blocked domain coordinator access';
149: last;
150: }
151: }
152: if ($dcroles{$domain}) {
153: &check_privs($domain,$coursenum,$then,$now,'cc');
154: }
155: last;
156: }
157: # Is this a recent ad-hoc CA-role?
158: if (my ($domain,$user) =
159: ($envkey =~ m-^form\.ca\./($match_domain)/($match_username)$-)) {
160: # See if still allowed
161: my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],$domain,$user);
162: if ($blocked{'domcoord.author'} eq 'blocked') {
163: delete($env{$envkey});
164: $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
165: last;
166: }
167: if (($dcroles{$domain}) && (&is_author_homeserver($user,$domain))) {
168: &check_privs($domain,$user,$then,$now,'ca');
169: } else {
170: delete($env{$envkey});
171: }
172: last;
173: }
174: # Is this a new ad-hoc CA-role?
175: if (my ($domain) =
176: ($envkey =~ m-^form\.adhocca\./($match_domain)$-)) {
177: my $user=$env{'form.adhoccauname.'.$domain};
178: if (!$user) { $user=$env{'form.adhoccaunamerecent.'.$domain} };
179: # See if that is even allowed
180: my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],$domain,$user);
181: if ($blocked{'domcoord.author'} eq 'blocked') {
182: $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
183: last;
184: }
185: if ($dcroles{$domain}) {
186: if (($user) && ($user=~/$match_username/) && (&is_author_homeserver($user,$domain))) {
187: &check_privs($domain,$user,$then,$now,'ca');
188: $env{'form.ca./'.$domain.'/'.$user}=1;
189: }
190: }
191: last;
192: }
193: }
194: }
195:
196: foreach $envkey (keys %env) {
197: next if ($envkey!~/^user\.role\./);
198: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
199: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
200: if ($env{'form.'.$trolecode}) {
201: if ($tstatus eq 'is') {
202: $where=~s/^\///;
203: my ($cdom,$cnum,$csec)=split(/\//,$where);
204: # check for course groups
205: my %coursegroups = &Apache::lonnet::get_active_groups(
206: $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
207: my $cgrps = join(':',keys(%coursegroups));
208:
209: # store role if recent_role list being kept
210: if ($env{'environment.recentroles'}) {
211: my %frozen_roles =
212: &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
213: &Apache::lonhtmlcommon::store_recent('roles',
214: $trolecode,' ',$frozen_roles{$trolecode});
215: }
216:
217:
218: # check for keyed access
219: if (($role eq 'st') &&
220: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
221: # who is key authority?
222: my $authdom=$cdom;
223: my $authnum=$cnum;
224: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
225: ($authnum,$authdom)=
226: split(/:/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
227: }
228: # check with key authority
229: unless (&Apache::lonnet::validate_access_key(
230: $env{'environment.key.'.$cdom.'_'.$cnum},
231: $authdom,$authnum)) {
232: # there is no valid key
233: if ($env{'form.newkey'}) {
234: # student attempts to register a new key
235: &Apache::loncommon::content_type($r,'text/html');
236: &Apache::loncommon::no_cache($r);
237: $r->send_http_header;
238: my $swinfo=&Apache::lonmenu::rawconfig();
239: my $start_page=&Apache::loncommon::start_page
240: ('Verifying Access Key to Unlock this Course');
241: my $end_page=&Apache::loncommon::end_page();
242: my $buttontext=&mt('Enter Course');
243: my $message=&mt('Successfully registered key');
244: my $assignresult=
245: &Apache::lonnet::assign_access_key(
246: $env{'form.newkey'},
247: $authdom,$authnum,
248: $cdom,$cnum,
249: $env{'user.domain'},
250: $env{'user.name'},
251: 'Assigned from '.$ENV{'REMOTE_ADDR'}.' at '.localtime().' for '.
252: $trolecode);
253: unless ($assignresult eq 'ok') {
254: $assignresult=~s/^error\:\s*//;
255: $message=&mt($assignresult).
256: '<br /><a href="/adm/logout">'.
257: &mt('Logout').'</a>';
258: $buttontext=&mt('Re-Enter Key');
259: }
260: $r->print(<<ENDENTEREDKEY);
261: $start_page
262: <script type="text/javascript">
263: $swinfo
264: </script>
265: <form method="post">
266: <input type="hidden" name="selectrole" value="1" />
267: <input type="hidden" name="$trolecode" value="1" />
268: <font size="+2">$message</font><br />
269: <input type="submit" value="$buttontext" />
270: </form>
271: $end_page
272: ENDENTEREDKEY
273: return OK;
274: } else {
275: # print form to enter a new key
276: &Apache::loncommon::content_type($r,'text/html');
277: &Apache::loncommon::no_cache($r);
278: $r->send_http_header;
279: my $swinfo=&Apache::lonmenu::rawconfig();
280: my $start_page=&Apache::loncommon::start_page
281: ('Enter Access Key to Unlock this Course');
282: my $end_page=&Apache::loncommon::end_page();
283: $r->print(<<ENDENTERKEY);
284: $start_page
285: <script type="text/javascript">
286: $swinfo
287: </script>
288: <form method="post">
289: <input type="hidden" name="selectrole" value="1" />
290: <input type="hidden" name="$trolecode" value="1" />
291: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
292: <input type="submit" value="Enter key" />
293: </form>
294: $end_page
295: ENDENTERKEY
296: return OK;
297: }
298: }
299: }
300: &Apache::lonnet::log($env{'user.domain'},
301: $env{'user.name'},
302: $env{'user.home'},
303: "Role ".$trolecode);
304:
305: &Apache::lonnet::appenv(
306: {'request.role' => $trolecode,
307: 'request.role.domain' => $cdom,
308: 'request.course.sec' => $csec,
309: 'request.course.groups' => $cgrps});
310: my $tadv=0;
311:
312: if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
313: my $msg;
314: my ($furl,$ferr)=
315: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
316: if (($env{'form.orgurl'}) &&
317: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
318: my $dest=$env{'form.orgurl'};
319: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
320: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
321: if (($ferr) && ($tadv)) {
322: &error_page($r,$ferr,$dest);
323: } else {
324: $r->internal_redirect($dest);
325: }
326: return OK;
327: } else {
328: if (!$env{'request.course.id'}) {
329: &Apache::lonnet::appenv(
330: {"request.course.id" => $cdom.'_'.$cnum});
331: $furl='/adm/roles?tryagain=1';
332: $msg=
333: '<h1><span class="LC_error">'.
334: &mt('Could not initialize [_1] at this time.',
335: $env{'course.'.$cdom.'_'.$cnum.'.description'}).
336: '</span></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
337: }
338: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
339: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
340:
341: if (($ferr) && ($tadv)) {
342: &error_page($r,$ferr,$furl);
343: } else {
344: # Check to see if the user is a CC entering a course
345: # for the first time
346: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
347: if (substr($courseid, 0, 1) eq '/') {
348: $courseid = substr($courseid, 1);
349: }
350: $courseid =~ s/\//_/;
351: if ($role eq 'cc' && $env{'course.' . $courseid .
352: '.course.helper.not.run'}) {
353: $furl = "/adm/helper/course.initialization.helper";
354: # Send the user to the course they selected
355: } elsif ($env{'request.course.id'}) {
356: if ($env{'form.destinationurl'}) {
357: my $dest = $env{'form.destinationurl'};
358: &redirect_user($r,&mt('Entering [_1]',
359: $env{'course.'.$courseid.'.description'}),
360: $dest,$msg,
361: $env{'environment.remotenavmap'});
362: return OK;
363: }
364: if (&Apache::lonnet::allowed('whn',
365: $env{'request.course.id'})
366: || &Apache::lonnet::allowed('whn',
367: $env{'request.course.id'}.'/'
368: .$env{'request.course.sec'})
369: ) {
370: my $startpage = &courseloadpage($courseid);
371: unless ($startpage eq 'firstres') {
372: $msg = &mt('Entering [_1] ....',
373: $env{'course.'.$courseid.'.description'});
374: &redirect_user($r,&mt('New in course'),
375: '/adm/whatsnew?refpage=start',$msg,
376: $env{'environment.remotenavmap'});
377: return OK;
378: }
379: }
380: }
381: # Are we allowed to look at the first resource?
382: if ($furl !~ m|^/adm/|) {
383: # Guess not ...
384: $furl=&Apache::lonpageflip::first_accessible_resource();
385: }
386: $msg = &mt('Entering [_1] ...',
387: $env{'course.'.$courseid.'.description'});
388: &redirect_user($r,&mt('Entering [_1]',
389: $env{'course.'.$courseid.'.description'}),
390: $furl,$msg,
391: $env{'environment.remotenavmap'});
392: }
393: return OK;
394: }
395: }
396: #
397: # Send the user to the construction space they selected
398: if ($role =~ /^(au|ca|aa)$/) {
399: my $redirect_url = '/priv/';
400: if ($role eq 'au') {
401: $redirect_url.=$env{'user.name'};
402: } else {
403: $where =~ /\/(.*)$/;
404: $redirect_url .= $1;
405: }
406: $redirect_url .= '/';
407: &redirect_user($r,&mt('Entering Construction Space'),
408: $redirect_url);
409: return OK;
410: }
411: if ($role eq 'dc') {
412: my $redirect_url = '/adm/menu/';
413: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
414: $redirect_url);
415: return OK;
416: }
417: }
418: }
419: }
420: }
421:
422:
423: # =============================================================== No Roles Init
424:
425: &Apache::loncommon::content_type($r,'text/html');
426: &Apache::loncommon::no_cache($r);
427: $r->send_http_header;
428: return OK if $r->header_only;
429:
430: my $swinfo=&Apache::lonmenu::rawconfig();
431: my $start_page=&Apache::loncommon::start_page('User Roles');
432: my $standby=&mt('Role selected. Please stand by.');
433: $standby=~s/\n/\\n/g;
434: my $noscript='<span class="LC_error">'.&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.').'<br />'.&mt('As this is not the case, most functionality in the system will be unavailable.').'</span><br />';
435:
436: $r->print(<<ENDHEADER);
437: $start_page
438: <br />
439: <noscript>
440: $noscript
441: </noscript>
442: <script type="text/javascript">
443: $swinfo
444: window.focus();
445:
446: active=true;
447:
448: function enterrole (thisform,rolecode,buttonname) {
449: if (active) {
450: active=false;
451: document.title='$standby';
452: window.status='$standby';
453: thisform.newrole.value=rolecode;
454: thisform.submit();
455: } else {
456: alert('$standby');
457: }
458: }
459: </script>
460: ENDHEADER
461:
462: # ------------------------------------------ Get Error Message from Environment
463:
464: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
465: if ($env{'user.error.msg'}) {
466: $r->log_reason(
467: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
468: }
469:
470: # ------------------------------------------------- Can this user re-init, etc?
471:
472: my $advanced=$env{'user.adv'};
473: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
474: my $tryagain=$env{'form.tryagain'};
475:
476: # -------------------------------------------------------- Generate Page Output
477: # --------------------------------------------------------------- Error Header?
478: if ($error) {
479: $r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
480: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
481: if ($priv ne '') {
482: $r->print(&mt('Access : ').&Apache::lonnet::plaintext($priv)."\n");
483: }
484: if ($fn ne '') {
485: $r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
486: }
487: if ($msg ne '') {
488: $r->print(&mt('Action : ').$msg."\n");
489: }
490: $r->print("</pre><hr />");
491: my $url=$fn;
492: my $last;
493: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
494: &GDBM_READER(),0640)) {
495: $last=$hash{'last_known'};
496: untie(%hash);
497: }
498: if ($last) { $fn.='?symb='.&escape($last); }
499:
500: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
501: &Apache::lonenc::check_encrypt($fn));
502: } else {
503: if ($env{'user.error.msg'}) {
504: $r->print(
505: '<h3><span class="LC_error">'.
506: &mt('You need to choose another user role or enter a specific course for this function').'</span></h3>');
507: }
508: }
509: # -------------------------------------------------------- Choice or no choice?
510: if ($nochoose) {
511: $r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
512: &mt('This action is currently not authorized.').'</span>'.
513: &Apache::loncommon::end_page());
514: return OK;
515: } else {
516: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
517: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
518: }
519: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
520: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
521: $r->print('<input type="hidden" name="selectrole" value="1" />');
522: $r->print('<input type="hidden" name="newrole" value="" />');
523: }
524: if ($env{'user.adv'}) {
525: $r->print(
526: '<br /><span class="LC_rolesinfo"><label>'.&mt('Show all roles').': <input type="checkbox" name="showall"');
527: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
528: $r->print(' /></label><input type="submit" value="'.&mt('Display').'" /></span>');
529: }
530:
531: my (%roletext,%sortrole,%roleclass);
532: my $countactive=0;
533: my $inrole=0;
534: my $possiblerole='';
535: foreach $envkey (sort keys %env) {
536: my $button = 1;
537: my $switchserver='';
538: my $roletext;
539: my $sortkey;
540: if ($envkey=~/^user\.role\./) {
541: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
542: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
543: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
544: $tremark='';
545: $tpstart=' ';
546: $tpend=' ';
547: $tfont='#000000';
548: if ($tstart) {
549: $tpstart=&Apache::lonlocal::locallocaltime($tstart);
550: }
551: if ($tend) {
552: $tpend=&Apache::lonlocal::locallocaltime($tend);
553: }
554: if ($env{'request.role'} eq $trolecode) {
555: $tstatus='selected';
556: }
557: my $tbg;
558: if (($tstatus eq 'is')
559: || ($tstatus eq 'selected')
560: || ($tstatus eq 'will')
561: || ($tstatus eq 'future')
562: || ($env{'form.showall'})) {
563: if ($tstatus eq 'is') {
564: $tbg='#77FF77';
565: $tfont='#003300';
566: $possiblerole=$trolecode;
567: $countactive++;
568: } elsif ($tstatus eq 'future') {
569: $tbg='#FFFF77';
570: $button=0;
571: } elsif ($tstatus eq 'will') {
572: $tbg='#FFAA77';
573: $tremark.=&mt('Active at next login. ');
574: } elsif ($tstatus eq 'expired') {
575: $tbg='#FF7777';
576: $tfont='#330000';
577: $button=0;
578: } elsif ($tstatus eq 'will_not') {
579: $tbg='#AAFF77';
580: $tremark.=&mt('Expired after logout. ');
581: } elsif ($tstatus eq 'selected') {
582: $tbg='#11CC55';
583: $tfont='#002200';
584: $inrole=1;
585: $countactive++;
586: $tremark.=&mt('Currently selected. ');
587: }
588: my $trole;
589: if ($role =~ /^cr\//) {
590: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
591: if ($tremark) { $tremark.='<br />'; }
592: $tremark.=&mt('Defined by ').$rauthor.
593: &mt(' at ').$rdomain.'.';
594: }
595: $trole=Apache::lonnet::plaintext($role);
596: my $ttype;
597: my $twhere;
598: my ($tdom,$trest,$tsection)=
599: split(/\//,Apache::lonnet::declutter($where));
600: # First, Co-Authorship roles
601: if (($role eq 'ca') || ($role eq 'aa')) {
602: my $home = &Apache::lonnet::homeserver($trest,$tdom);
603: my $allowed=0;
604: my @ids=&Apache::lonnet::current_machine_ids();
605: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
606: if (!$allowed) {
607: $button=0;
608: $switchserver='otherserver='.$home.'&role='.$trolecode;
609: }
610: #next if ($home eq 'no_host');
611: $home = &Apache::lonnet::hostname($home);
612: $ttype='Construction Space';
613: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
614: ': '.$tdom.'<br />'.
615: ' '.&mt('Server').': '.$home;
616: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
617: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
618: $sortkey=$role."$trest:$tdom";
619: } elsif ($role eq 'au') {
620: # Authors
621: my $home = &Apache::lonnet::homeserver
622: ($env{'user.name'},$env{'user.domain'});
623: my $allowed=0;
624: my @ids=&Apache::lonnet::current_machine_ids();
625: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
626: if (!$allowed) {
627: $button=0;
628: $switchserver='otherserver='.$home.'&role='.$trolecode;
629: }
630: #next if ($home eq 'no_host');
631: $home = &Apache::lonnet::hostname($home);
632: $ttype='Construction Space';
633: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
634: ': '.$home;
635: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
636: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
637: $sortkey=$role;
638: } elsif ($trest) {
639: my $tcourseid=$tdom.'_'.$trest;
640: $ttype = &Apache::loncommon::course_type($tcourseid);
641: $trole = &Apache::lonnet::plaintext($role,$ttype);
642: if ($env{'course.'.$tcourseid.'.description'}) {
643: $twhere=$env{'course.'.$tcourseid.'.description'};
644: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
645: unless ($twhere eq &mt('Currently not available')) {
646: $twhere.=' <font size="-2">'.
647: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
648: '</font>';
649: }
650: } else {
651: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
652: if (%newhash) {
653: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
654: "\0".$envkey;
655: $twhere=$newhash{'description'}.
656: ' <font size="-2">'.
657: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
658: '</font>';
659: $ttype = $newhash{'type'};
660: $trole = &Apache::lonnet::plaintext($role,$ttype);
661: } else {
662: $twhere=&mt('Currently not available');
663: $env{'course.'.$tcourseid.'.description'}=$twhere;
664: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
665: $ttype = 'Unavailable';
666: }
667: }
668: if ($tsection) {
669: $twhere.='<br />'.&mt('Section').': '.$tsection;
670: }
671: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
672: } elsif ($tdom) {
673: $ttype='Domain';
674: $twhere=$tdom;
675: $sortkey=$role.$twhere;
676: } else {
677: $ttype='System';
678: $twhere=&mt('system wide');
679: $sortkey=$role.$twhere;
680: }
681: $roletext.=&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver);
682: $roletext{$envkey}=$roletext;
683: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
684: $sortrole{$sortkey}=$envkey;
685: $roleclass{$envkey}=$ttype;
686: }
687: }
688: }
689: # No active roles
690: if ($countactive==0) {
691: if ($inrole) {
692: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
693: } else {
694: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
695: }
696: $r->print('</form>'.&Apache::loncommon::end_page());
697: return OK;
698: # Is there only one choice?
699: } elsif (($countactive==1) && ($env{'request.role'} eq 'cm')) {
700: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
701: '<input type="hidden" name="'.$possiblerole.'" value="1" />'.
702: '<noscript><br /><input type="submit" name="submit" value="'.&mt('Continue').'" /></noscript>');
703: $r->print("</form>\n");
704: $r->rflush();
705: $r->print('<script type="text/javascript">document.forms.rolechoice.submit();</script>');
706: $r->print(&Apache::loncommon::end_page());
707: return OK;
708: }
709: # More than one possible role
710: # ----------------------------------------------------------------------- Table
711: unless ((!&Apache::lonmenu::show_course()) || ($nochoose)) {
712: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
713: }
714: $r->print('<br /><table id="LC_rolesmenu"><tr>');
715: unless ($nochoose) { $r->print('<th> </th>'); }
716: $r->print('<th>'.&mt('User Role').'</th><th>'.&mt('Extent').
717: '</th><th>'.&mt('Start').'</th><th>'.&mt('End').'</th></tr>'."\n");
718: my $doheaders=-1;
719: foreach my $type ('Domain','Construction Space','Course','Unavailable','System') {
720: my $haverole=0;
721: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
722: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
723: $haverole=1;
724: }
725: }
726: if ($haverole) { $doheaders++; }
727: }
728:
729: if ($env{'environment.recentroles'}) {
730: my %recent_roles =
731: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
732: my $output='';
733: foreach (sort(keys(%recent_roles))) {
734: if (defined($roletext{'user.role.'.$_})) {
735: $output.=$roletext{'user.role.'.$_};
736: if ($_ =~ m-dc\./($match_domain)/-
737: && $dcroles{$1}) {
738: $output .= &allcourses_row($1,'recent').
739: &allcoauthors_row($1,'recent');
740: }
741: } elsif ($numdc > 0) {
742: unless ($_ =~/^error\:/) {
743: $output.=&display_cc_role('user.role.'.$_);
744: }
745: }
746: }
747: if ($output) {
748: $r->print("<tr><td align='center' colspan='5'><font face='arial'>".
749: &mt('Recent Roles')."</font></td>");
750: $r->print($output);
751: $r->print("</tr>");
752: $doheaders ++;
753: }
754: }
755:
756: if ($numdc > 0) {
757: $r->print(&coursepick_jscript());
758: $r->print(&Apache::loncommon::coursebrowser_javascript());
759: }
760: foreach my $type ('Construction Space','Domain','Course','Unavailable','System') {
761: my $output;
762: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
763: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
764: $output.=$roletext{$sortrole{$which}};
765: if ($sortrole{$which} =~ m-dc\./($match_domain)/-) {
766: if ($dcroles{$1}) {
767: $output .= &allcourses_row($1,'').
768: &allcoauthors_row($1,'');
769: }
770: }
771: }
772: }
773: if ($output) {
774: if ($doheaders > 0) {
775: $r->print("<tr>".
776: "<td align='center' colspan='5'><font face='arial'>".&mt($type)."</font></td></tr>");
777: }
778: $r->print($output);
779: }
780: }
781: my $tremark='';
782: my $tfont='#003300';
783: if ($env{'request.role'} eq 'cm') {
784: $r->print('<tr bgcolor="#11CC55">');
785: $tremark=&mt('Currently selected. ');
786: $tfont='#002200';
787: } else {
788: $r->print('<tr bgcolor="#77FF77">');
789: }
790: unless ($nochoose) {
791: if ($env{'request.role'} ne 'cm') {
792: $r->print('<td><input type="submit" value="'.
793: &mt('Select').'" name="cm"></td>');
794: } else {
795: $r->print('<td> </td>');
796: }
797: }
798: $r->print('<td colspan="3"><font color="'.$tfont.'"><span class="LC_rolesinfo">'.&mt('No role specified').
799: '</font></span></td><td><font color="'.$tfont.'">'.$tremark.
800: ' </font></td></tr>'."\n");
801:
802: $r->print('</table>');
803: unless ($nochoose) {
804: $r->print("</form>\n");
805: }
806: # ------------------------------------------------------------ Privileges Info
807: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
808: $r->print('<hr /><h2>Current Privileges</h2>');
809: $r->print(&privileges_info());
810: }
811: $r->print(&Apache::lonnet::getannounce());
812: if ($advanced) {
813: $r->print('<p><small><i>This is LON-CAPA '.
814: $r->dir_config('lonVersion').'</i><br />'.
815: '<a href="/adm/logout">'.&mt('Logout').'</a></small></p>');
816: }
817: $r->print(&Apache::loncommon::end_page());
818: return OK;
819: }
820:
821: sub privileges_info {
822: my ($which) = @_;
823: my $output;
824:
825: $which ||= $env{'request.role'};
826:
827: foreach my $envkey (sort(keys(%env))) {
828: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
829:
830: my $where=$1;
831: my $ttype;
832: my $twhere;
833: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
834: if ($trest) {
835: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
836: $ttype='Construction Space';
837: $twhere='User: '.$trest.', Domain: '.$tdom;
838: } else {
839: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
840: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
841: if ($tsec) {
842: my $sec_type = 'Section';
843: if (exists($env{"user.role.gr.$where"})) {
844: $sec_type = 'Group';
845: }
846: $twhere.=' ('.$sec_type.': '.$tsec.')';
847: }
848: }
849: } elsif ($tdom) {
850: $ttype='Domain';
851: $twhere=$tdom;
852: } else {
853: $ttype='System';
854: $twhere='/';
855: }
856: $output .= "\n<h3>".$ttype.': '.$twhere.'</h3>'."\n<ul>";
857: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
858: next if (!$priv);
859:
860: my ($prv,$restr)=split(/\&/,$priv);
861: my $trestr='';
862: if ($restr ne 'F') {
863: $trestr.=' ('.
864: join(', ',
865: map { &Apache::lonnet::plaintext($_) }
866: (split('',$restr))).') ';
867: }
868: $output .= "\n\t".
869: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
870: }
871: $output .= "\n".'</ul>';
872: }
873: return $output;
874: }
875:
876: sub role_status {
877: my ($rolekey,$then,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
878: my @pwhere = ();
879: if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
880: (undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
881: unless (!defined($$role) || $$role eq '') {
882: $$where=join('.',@pwhere);
883: $$trolecode=$$role.'.'.$$where;
884: ($$tstart,$$tend)=split(/\./,$env{$rolekey});
885: $$tstatus='is';
886: if ($$tstart && $$tstart>$then) {
887: $$tstatus='future';
888: if ($$tstart<$now) { $$tstatus='will'; }
889: }
890: if ($$tend) {
891: if ($$tend<$then) {
892: $$tstatus='expired';
893: } elsif ($$tend<$now) {
894: $$tstatus='will_not';
895: }
896: }
897: }
898: }
899: }
900:
901: sub build_roletext {
902: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver) = @_;
903: my $roletext='<tr bgcolor="'.$tbg.'" class="LC_rolesmenu_'.$tstatus.'">';
904: my $is_dc=($trolecode =~ m/^dc\./);
905: my $rowspan=($is_dc) ? ''
906: : ' rowspan="2" ';
907:
908: unless ($nochoose) {
909: my $buttonname=$trolecode;
910: $buttonname=~s/\W//g;
911: if (!$button) {
912: if ($switchserver) {
913: $roletext.='<td'.$rowspan.'><span class="LC_rolesinfo"><a href="/adm/switchserver?'.
914: $switchserver.'">'.&mt('Switch Server').'</a></span></td>';
915: } else {
916: $roletext.=('<td'.$rowspan.'> </td>');
917: }
918: } elsif ($tstatus eq 'is') {
919: $roletext.='<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
920: &mt('Select').'" onClick="javascript:enterrole(this.form,\''.
921: $trolecode."','".$buttonname.'\');"></td>';
922: } elsif ($tryagain) {
923: $roletext.=
924: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
925: &mt('Try Selecting Again').'" onClick="javascript:enterrole(this.form,\''.
926: $trolecode."','".$buttonname.'\');"></td>';
927: } elsif ($advanced) {
928: $roletext.=
929: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
930: &mt('Re-Initialize').'" onClick="javascript:enterrole(this.form,\''.
931: $trolecode."','".$buttonname.'\');"></td>';
932: } else {
933: $roletext.='<td'.$rowspan.'> </td>';
934: }
935: }
936: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
937: $tremark.=&Apache::lonannounce::showday(time,1,
938: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
939: }
940: $roletext.='<td><font color="'.$tfont.'">'.$trole.
941: '</font></td><td><font color="'.$tfont.'">'.$twhere.
942: '</font></td><td><font color="'.$tfont.'">'.$tpstart.
943: '</font></td><td><font color="'.$tfont.'">'.$tpend.
944: '</font></td></tr>';
945: if (!$is_dc) {
946: $roletext.='<tr bgcolor="'.$tbg.'"><td colspan="4"><font color="'.$tfont.'"><span class="LC_rolesinfo">'.$tremark.
947: '</span> </font></td></tr><tr><td colspan="5" height="3"></td></tr>'."\n";
948: }
949: return $roletext;
950: }
951:
952: sub is_author_homeserver {
953: my ($uname,$udom)=@_;
954: my $home = &Apache::lonnet::homeserver($uname,$udom);
955: my @ids=&Apache::lonnet::current_machine_ids();
956: foreach my $id (@ids) {
957: if ($id eq $home) {
958: if (-e "/home/".$uname."/public_html") {
959: return 1;
960: }
961: }
962: }
963: return 0;
964: }
965:
966: sub check_privs {
967: my ($cdom,$cnum,$then,$now,$checkrole) = @_;
968: my $cckey = 'user.role.'.$checkrole.'./'.$cdom.'/'.$cnum;
969: if ($env{$cckey}) {
970: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
971: &role_status($cckey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
972: unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
973: &set_privileges($cdom,$cnum,$checkrole);
974: }
975: } else {
976: &set_privileges($cdom,$cnum,$checkrole);
977: }
978: }
979:
980: sub check_fordc {
981: my ($dcroles,$then) = @_;
982: my $numdc = 0;
983: if ($env{'user.adv'}) {
984: foreach my $envkey (sort keys %env) {
985: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
986: my $dcdom = $1;
987: my $livedc = 1;
988: my ($tstart,$tend)=split(/\./,$env{$envkey});
989: if ($tstart && $tstart>$then) { $livedc = 0; }
990: if ($tend && $tend <$then) { $livedc = 0; }
991: if ($livedc) {
992: $$dcroles{$dcdom} = $envkey;
993: $numdc++;
994: }
995: }
996: }
997: }
998: return $numdc;
999: }
1000:
1001: sub adhoc_course_role {
1002: my ($then) = @_;
1003: my ($cdom,$cnum);
1004: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1005: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1006: if (&check_forcc($cdom,$cnum,$then)) {
1007: my $setprivs;
1008: if (!defined($env{'user.role.'.$env{'form.selectrole'}})) {
1009: $setprivs = 1;
1010: } else {
1011: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.selectrole'}});
1012: if (($start && ($start>$then || $start == -1)) ||
1013: ($end && $end<$then)) {
1014: $setprivs = 1;
1015: }
1016: }
1017: if ($setprivs) {
1018: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E(/?\w*)$-) {
1019: my $role = $1;
1020: my $custom_role = $2;
1021: my $usec = $3;
1022: if ($role eq 'cr') {
1023: if ($custom_role =~ m-^$match_domain/$match_courseid/\w+$-) {
1024: $role .= $custom_role;
1025: } else {
1026: return;
1027: }
1028: }
1029: my (%userroles,%newrole,%newgroups);
1030: my $area = '/'.$cdom.'/'.$cnum;
1031: my $spec = $role.'.'.$area;
1032: if ($usec ne '') {
1033: $spec .= '/'.$usec;
1034: $area .= '/'.$usec;
1035: }
1036: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1037: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,%newgroups);
1038: my $adhocstart = $then-1;
1039: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1040: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1041: }
1042: }
1043: }
1044: return;
1045: }
1046:
1047: sub check_forcc {
1048: my ($cdom,$cnum,$then) = @_;
1049: my $is_cc;
1050: if ($cdom ne '' && $cnum ne '') {
1051: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1052: my $envkey = 'user.role.cc./'.$cdom.'/'.$cnum;
1053: if (defined($env{$envkey})) {
1054: $is_cc = 1;
1055: my ($tstart,$tend)=split(/\./,$env{$envkey});
1056: if ($tstart && $tstart>$then) { $is_cc = 0; }
1057: if ($tend && $tend <$then) { $is_cc = 0; }
1058: }
1059: }
1060: }
1061: return $is_cc;
1062: }
1063:
1064: sub courselink {
1065: my ($dcdom,$rowtype,$selecttype) = @_;
1066: my $courseform=&Apache::loncommon::selectcourse_link
1067: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1068: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1069: $dcdom,$dcdom,undef);
1070: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1071: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1072: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1073: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1074: return $courseform.$hiddenitems;
1075: }
1076:
1077: sub coursepick_jscript {
1078: my %lt = &Apache::lonlocal::texthash(
1079: plsu => "Please use the 'Select Course' link to open a separate pick course window where you may select the course you wish to enter.",
1080: youc => 'You can only use this screen to select courses in the current domain.',
1081: );
1082: my $verify_script = <<"END";
1083: <script type="text/javascript">
1084: function verifyCoursePick(caller) {
1085: var numbutton = getIndex(caller)
1086: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1087: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1088: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1089: if (pickedCourse != '') {
1090: if (numbutton != -1) {
1091: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1092: document.rolechoice.elements[numbutton+1].name = courseTarget
1093: document.rolechoice.submit()
1094: }
1095: }
1096: else {
1097: alert("$lt{'plsu'}");
1098: }
1099: }
1100: else {
1101: alert("$lt{'youc'}")
1102: }
1103: }
1104: function getIndex(caller) {
1105: for (var i=0;i<document.rolechoice.elements.length;i++) {
1106: if (document.rolechoice.elements[i] == caller) {
1107: return i;
1108: }
1109: }
1110: return -1;
1111: }
1112: </script>
1113: END
1114: return $verify_script;
1115: }
1116:
1117: sub display_cc_role {
1118: my $rolekey = shift;
1119: my $roletext;
1120: my $advanced = $env{'user.adv'};
1121: my $tryagain = $env{'form.tryagain'};
1122: unless ($rolekey =~/^error\:/) {
1123: if ($rolekey =~ m-^user\.role.cc\./($match_domain)/($match_courseid)$-) {
1124: my $tcourseid = $1.'_'.$2;
1125: my $trolecode = 'cc./'.$1.'/'.$2;
1126: my $twhere;
1127: my $ttype;
1128: my $tbg='#77FF77';
1129: my $tfont='#003300';
1130: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1131: if (%newhash) {
1132: $twhere=$newhash{'description'}.
1133: ' <font size="-2">'.
1134: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1,$tfont).
1135: '</font>';
1136: $ttype = $newhash{'type'};
1137: } else {
1138: $twhere=&mt('Currently not available');
1139: $env{'course.'.$tcourseid.'.description'}=$twhere;
1140: }
1141: my $trole = &Apache::lonnet::plaintext('cc',$ttype);
1142: $twhere.="<br />".&mt('Domain').":".$1;
1143: $roletext = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$tfont,$trole,$twhere,'','','',1,'');
1144: }
1145: }
1146: return ($roletext);
1147: }
1148:
1149: sub allcourses_row {
1150: my ($dcdom,$rowtype) = @_;
1151: my $output = '<tr bgcolor="#77FF77">'.
1152: ' <td colspan="5">';
1153: my $selectlink = &courselink($dcdom,$rowtype);
1154: my $ccrole = &Apache::lonnet::plaintext('cc');
1155: $output.= '<span class="LC_rolesinfo">'.
1156: &mt('[_1]: [_2] from domain [_3]',$ccrole,$selectlink,$dcdom).
1157: '</span><br /></tr>'."\n";
1158: return $output;
1159: }
1160:
1161: sub allcoauthors_row {
1162: my ($dcdom,$rowtype) = @_;
1163: my $output = '<tr bgcolor="#77FF77">'.
1164: ' <td colspan="5">';
1165: my $carole = &Apache::lonnet::plaintext('ca');
1166: my $inputlink='<input type="text" size="10" name="adhoccauname'.$rowtype.'.'.$dcdom.'" />';
1167: my $gobutton='<input type="submit" name="adhocca./'.$dcdom.'" value="'.&mt('Go').'" />';
1168: $output.= '<span class="LC_rolesinfo">'.
1169: &mt('[_1]: [_2] in domain [_3] [_4]',$carole,$inputlink,$dcdom,$gobutton).
1170: '</span><br /></tr><tr><td colspan="5" height="3"></td></tr>'."\n";
1171: return $output;
1172: }
1173:
1174: sub recent_filename {
1175: my $area=shift;
1176: return 'nohist_recent_'.&escape($area);
1177: }
1178:
1179: sub set_privileges {
1180: # role can be cc or ca
1181: my ($dcdom,$pickedcourse,$role) = @_;
1182: my $area = '/'.$dcdom.'/'.$pickedcourse;
1183: my $spec = $role.'.'.$area;
1184: my %userroles = &Apache::lonnet::set_arearole($role,$area,'','',
1185: $env{'user.domain'},
1186: $env{'user.name'});
1187: my %ccrole = ();
1188: &Apache::lonnet::standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
1189: my ($author,$adv)= &Apache::lonnet::set_userprivs(\%userroles,\%ccrole);
1190: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1191:
1192: &Apache::lonnet::log($env{'user.domain'},
1193: $env{'user.name'},
1194: $env{'user.home'},
1195: "Role ".$role);
1196: &Apache::lonnet::appenv(
1197: {'request.role' => $spec,
1198: 'request.role.domain' => $dcdom,
1199: 'request.course.sec' => ''});
1200: my $tadv=0;
1201: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1202: &Apache::lonnet::appenv({'request.role.adv' => $tadv});
1203: }
1204:
1205: sub courseloadpage {
1206: my ($courseid) = @_;
1207: my $startpage;
1208: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1209: [$courseid.':courseinit']);
1210: my ($tmp) = %entry_settings;
1211: unless ($tmp =~ /^error: 2 /) {
1212: $startpage = $entry_settings{$courseid.':courseinit'};
1213: }
1214: if ($startpage eq '') {
1215: if (exists($env{'environment.course_init_display'})) {
1216: $startpage = $env{'environment.course_init_display'};
1217: }
1218: }
1219: return $startpage;
1220: }
1221:
1222: 1;
1223: __END__
1224:
1225: =head1 NAME
1226:
1227: Apache::lonroles - User Roles Screen
1228:
1229: =head1 SYNOPSIS
1230:
1231: Invoked by /etc/httpd/conf/srm.conf:
1232:
1233: <Location /adm/roles>
1234: PerlAccessHandler Apache::lonacc
1235: SetHandler perl-script
1236: PerlHandler Apache::lonroles
1237: ErrorDocument 403 /adm/login
1238: ErrorDocument 500 /adm/errorhandler
1239: </Location>
1240:
1241: =head1 OVERVIEW
1242:
1243: =head2 Choosing Roles
1244:
1245: C<lonroles> is a handler that allows a user to switch roles in
1246: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1247: default role that a user has before selecting a role, as widely as
1248: possible, but certain handlers for example need specification which
1249: course they should act on, etc. Both in this scenario, and when the
1250: handler determines via C<lonnet>'s C<&allowed> function that a certain
1251: action is not allowed, C<lonroles> is used as error handler. This
1252: allows the user to select another role which may have permission to do
1253: what they were trying to do. C<lonroles> can also be accessed via the
1254: B<CRS> button in the Remote Control.
1255:
1256: =begin latex
1257:
1258: \begin{figure}
1259: \begin{center}
1260: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1261: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1262: \end{center}
1263: \end{figure}
1264:
1265: =end latex
1266:
1267: =head2 Role Initialization
1268:
1269: 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.
1270:
1271: =head1 INTRODUCTION
1272:
1273: This module enables a user to select what role he wishes to
1274: operate under (instructor, student, teaching assistant, course
1275: coordinator, etc). These roles are pre-established by the actions
1276: of upper-level users.
1277:
1278: This is part of the LearningOnline Network with CAPA project
1279: described at http://www.lon-capa.org.
1280:
1281: =head1 HANDLER SUBROUTINE
1282:
1283: This routine is called by Apache and mod_perl.
1284:
1285: =over 4
1286:
1287: =item *
1288:
1289: Roles Initialization (yes/no)
1290:
1291: =item *
1292:
1293: Get Error Message from Environment
1294:
1295: =item *
1296:
1297: Who is this?
1298:
1299: =item *
1300:
1301: Generate Page Output
1302:
1303: =item *
1304:
1305: Choice or no choice
1306:
1307: =item *
1308:
1309: Table
1310:
1311: =item *
1312:
1313: Privileges
1314:
1315: =back
1316:
1317: =cut
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