1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.189 2008/05/14 19:18:37 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)$-)) {
140: # See if that is even allowed
141:
142: if ($dcroles{$domain}) {
143: &check_privs($domain,$coursenum,$then,$now,'cc');
144: }
145: last;
146: }
147: # Is this a recent ad-hoc CA-role?
148: if (my ($domain,$user) =
149: ($envkey =~ m-^form\.ca\./($match_domain)/($match_username)$-)) {
150: if (($dcroles{$domain}) && (&is_author_homeserver($user,$domain))) {
151: &check_privs($domain,$user,$then,$now,'ca');
152: } else {
153: delete($env{$envkey});
154: }
155: last;
156: }
157: # Is this a new ad-hoc CA-role?
158: if (my ($domain) =
159: ($envkey =~ m-^form\.adhocca\./($match_domain)$-)) {
160: my $user=$env{'form.adhoccauname.'.$domain};
161: if (!$user) { $user=$env{'form.adhoccaunamerecent.'.$domain} };
162: # See if that is even allowed
163: my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],$domain,$user);
164: if ($blocked{'domcoord.author'} eq 'blocked') {
165: $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
166: last;
167: }
168: if ($dcroles{$domain}) {
169: if (($user) && ($user=~/$match_username/) && (&is_author_homeserver($user,$domain))) {
170: &check_privs($domain,$user,$then,$now,'ca');
171: $env{'form.ca./'.$domain.'/'.$user}=1;
172: }
173: }
174: last;
175: }
176: }
177: }
178:
179: foreach $envkey (keys %env) {
180: next if ($envkey!~/^user\.role\./);
181: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
182: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
183: if ($env{'form.'.$trolecode}) {
184: if ($tstatus eq 'is') {
185: $where=~s/^\///;
186: my ($cdom,$cnum,$csec)=split(/\//,$where);
187: # check for course groups
188: my %coursegroups = &Apache::lonnet::get_active_groups(
189: $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
190: my $cgrps = join(':',keys(%coursegroups));
191:
192: # store role if recent_role list being kept
193: if ($env{'environment.recentroles'}) {
194: my %frozen_roles =
195: &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
196: &Apache::lonhtmlcommon::store_recent('roles',
197: $trolecode,' ',$frozen_roles{$trolecode});
198: }
199:
200:
201: # check for keyed access
202: if (($role eq 'st') &&
203: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
204: # who is key authority?
205: my $authdom=$cdom;
206: my $authnum=$cnum;
207: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
208: ($authnum,$authdom)=
209: split(/:/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
210: }
211: # check with key authority
212: unless (&Apache::lonnet::validate_access_key(
213: $env{'environment.key.'.$cdom.'_'.$cnum},
214: $authdom,$authnum)) {
215: # there is no valid key
216: if ($env{'form.newkey'}) {
217: # student attempts to register a new key
218: &Apache::loncommon::content_type($r,'text/html');
219: &Apache::loncommon::no_cache($r);
220: $r->send_http_header;
221: my $swinfo=&Apache::lonmenu::rawconfig();
222: my $start_page=&Apache::loncommon::start_page
223: ('Verifying Access Key to Unlock this Course');
224: my $end_page=&Apache::loncommon::end_page();
225: my $buttontext=&mt('Enter Course');
226: my $message=&mt('Successfully registered key');
227: my $assignresult=
228: &Apache::lonnet::assign_access_key(
229: $env{'form.newkey'},
230: $authdom,$authnum,
231: $cdom,$cnum,
232: $env{'user.domain'},
233: $env{'user.name'},
234: 'Assigned from '.$ENV{'REMOTE_ADDR'}.' at '.localtime().' for '.
235: $trolecode);
236: unless ($assignresult eq 'ok') {
237: $assignresult=~s/^error\:\s*//;
238: $message=&mt($assignresult).
239: '<br /><a href="/adm/logout">'.
240: &mt('Logout').'</a>';
241: $buttontext=&mt('Re-Enter Key');
242: }
243: $r->print(<<ENDENTEREDKEY);
244: $start_page
245: <script type="text/javascript">
246: $swinfo
247: </script>
248: <form method="post">
249: <input type="hidden" name="selectrole" value="1" />
250: <input type="hidden" name="$trolecode" value="1" />
251: <font size="+2">$message</font><br />
252: <input type="submit" value="$buttontext" />
253: </form>
254: $end_page
255: ENDENTEREDKEY
256: return OK;
257: } else {
258: # print form to enter a new key
259: &Apache::loncommon::content_type($r,'text/html');
260: &Apache::loncommon::no_cache($r);
261: $r->send_http_header;
262: my $swinfo=&Apache::lonmenu::rawconfig();
263: my $start_page=&Apache::loncommon::start_page
264: ('Enter Access Key to Unlock this Course');
265: my $end_page=&Apache::loncommon::end_page();
266: $r->print(<<ENDENTERKEY);
267: $start_page
268: <script type="text/javascript">
269: $swinfo
270: </script>
271: <form method="post">
272: <input type="hidden" name="selectrole" value="1" />
273: <input type="hidden" name="$trolecode" value="1" />
274: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
275: <input type="submit" value="Enter key" />
276: </form>
277: $end_page
278: ENDENTERKEY
279: return OK;
280: }
281: }
282: }
283: &Apache::lonnet::log($env{'user.domain'},
284: $env{'user.name'},
285: $env{'user.home'},
286: "Role ".$trolecode);
287:
288: &Apache::lonnet::appenv(
289: {'request.role' => $trolecode,
290: 'request.role.domain' => $cdom,
291: 'request.course.sec' => $csec,
292: 'request.course.groups' => $cgrps});
293: my $tadv=0;
294:
295: if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
296: my $msg;
297: my ($furl,$ferr)=
298: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
299: if (($env{'form.orgurl'}) &&
300: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
301: my $dest=$env{'form.orgurl'};
302: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
303: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
304: if (($ferr) && ($tadv)) {
305: &error_page($r,$ferr,$dest);
306: } else {
307: $r->internal_redirect($dest);
308: }
309: return OK;
310: } else {
311: if (!$env{'request.course.id'}) {
312: &Apache::lonnet::appenv(
313: {"request.course.id" => $cdom.'_'.$cnum});
314: $furl='/adm/roles?tryagain=1';
315: $msg=
316: '<h1><span class="LC_error">'.
317: &mt('Could not initialize [_1] at this time.',
318: $env{'course.'.$cdom.'_'.$cnum.'.description'}).
319: '</span></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
320: }
321: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
322: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
323:
324: if (($ferr) && ($tadv)) {
325: &error_page($r,$ferr,$furl);
326: } else {
327: # Check to see if the user is a CC entering a course
328: # for the first time
329: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
330: if (substr($courseid, 0, 1) eq '/') {
331: $courseid = substr($courseid, 1);
332: }
333: $courseid =~ s/\//_/;
334: if ($role eq 'cc' && $env{'course.' . $courseid .
335: '.course.helper.not.run'}) {
336: $furl = "/adm/helper/course.initialization.helper";
337: # Send the user to the course they selected
338: } elsif ($env{'request.course.id'}) {
339: if ($env{'form.destinationurl'}) {
340: my $dest = $env{'form.destinationurl'};
341: &redirect_user($r,&mt('Entering [_1]',
342: $env{'course.'.$courseid.'.description'}),
343: $dest,$msg,
344: $env{'environment.remotenavmap'});
345: return OK;
346: }
347: if (&Apache::lonnet::allowed('whn',
348: $env{'request.course.id'})
349: || &Apache::lonnet::allowed('whn',
350: $env{'request.course.id'}.'/'
351: .$env{'request.course.sec'})
352: ) {
353: my $startpage = &courseloadpage($courseid);
354: unless ($startpage eq 'firstres') {
355: $msg = &mt('Entering [_1] ....',
356: $env{'course.'.$courseid.'.description'});
357: &redirect_user($r,&mt('New in course'),
358: '/adm/whatsnew?refpage=start',$msg,
359: $env{'environment.remotenavmap'});
360: return OK;
361: }
362: }
363: }
364: # Are we allowed to look at the first resource?
365: if ($furl !~ m|^/adm/|) {
366: # Guess not ...
367: $furl=&Apache::lonpageflip::first_accessible_resource();
368: }
369: $msg = &mt('Entering [_1] ...',
370: $env{'course.'.$courseid.'.description'});
371: &redirect_user($r,&mt('Entering [_1]',
372: $env{'course.'.$courseid.'.description'}),
373: $furl,$msg,
374: $env{'environment.remotenavmap'});
375: }
376: return OK;
377: }
378: }
379: #
380: # Send the user to the construction space they selected
381: if ($role =~ /^(au|ca|aa)$/) {
382: my $redirect_url = '/priv/';
383: if ($role eq 'au') {
384: $redirect_url.=$env{'user.name'};
385: } else {
386: $where =~ /\/(.*)$/;
387: $redirect_url .= $1;
388: }
389: $redirect_url .= '/';
390: &redirect_user($r,&mt('Entering Construction Space'),
391: $redirect_url);
392: return OK;
393: }
394: if ($role eq 'dc') {
395: my $redirect_url = '/adm/menu/';
396: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
397: $redirect_url);
398: return OK;
399: }
400: }
401: }
402: }
403: }
404:
405:
406: # =============================================================== No Roles Init
407:
408: &Apache::loncommon::content_type($r,'text/html');
409: &Apache::loncommon::no_cache($r);
410: $r->send_http_header;
411: return OK if $r->header_only;
412:
413: my $swinfo=&Apache::lonmenu::rawconfig();
414: my $start_page=&Apache::loncommon::start_page('User Roles');
415: my $standby=&mt('Role selected. Please stand by.');
416: $standby=~s/\n/\\n/g;
417: 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 />';
418:
419: $r->print(<<ENDHEADER);
420: $start_page
421: <br />
422: <noscript>
423: $noscript
424: </noscript>
425: <script type="text/javascript">
426: $swinfo
427: window.focus();
428:
429: active=true;
430:
431: function enterrole (thisform,rolecode,buttonname) {
432: if (active) {
433: active=false;
434: document.title='$standby';
435: window.status='$standby';
436: thisform.newrole.value=rolecode;
437: thisform.submit();
438: } else {
439: alert('$standby');
440: }
441: }
442: </script>
443: ENDHEADER
444:
445: # ------------------------------------------ Get Error Message from Environment
446:
447: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
448: if ($env{'user.error.msg'}) {
449: $r->log_reason(
450: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
451: }
452:
453: # ------------------------------------------------- Can this user re-init, etc?
454:
455: my $advanced=$env{'user.adv'};
456: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
457: my $tryagain=$env{'form.tryagain'};
458:
459: # -------------------------------------------------------- Generate Page Output
460: # --------------------------------------------------------------- Error Header?
461: if ($error) {
462: $r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
463: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
464: if ($priv ne '') {
465: $r->print(&mt('Access : ').&Apache::lonnet::plaintext($priv)."\n");
466: }
467: if ($fn ne '') {
468: $r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
469: }
470: if ($msg ne '') {
471: $r->print(&mt('Action : ').$msg."\n");
472: }
473: $r->print("</pre><hr />");
474: my $url=$fn;
475: my $last;
476: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
477: &GDBM_READER(),0640)) {
478: $last=$hash{'last_known'};
479: untie(%hash);
480: }
481: if ($last) { $fn.='?symb='.&escape($last); }
482:
483: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
484: &Apache::lonenc::check_encrypt($fn));
485: } else {
486: if ($env{'user.error.msg'}) {
487: $r->print(
488: '<h3><span class="LC_error">'.
489: &mt('You need to choose another user role or enter a specific course for this function').'</span></h3>');
490: }
491: }
492: # -------------------------------------------------------- Choice or no choice?
493: if ($nochoose) {
494: $r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
495: &mt('This action is currently not authorized.').'</span>'.
496: &Apache::loncommon::end_page());
497: return OK;
498: } else {
499: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
500: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
501: }
502: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
503: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
504: $r->print('<input type="hidden" name="selectrole" value="1" />');
505: $r->print('<input type="hidden" name="newrole" value="" />');
506: }
507: if ($env{'user.adv'}) {
508: $r->print(
509: '<br /><span class="LC_rolesinfo"><label>'.&mt('Show all roles').': <input type="checkbox" name="showall"');
510: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
511: $r->print(' /></label><input type="submit" value="'.&mt('Display').'" /></span>');
512: }
513:
514: my (%roletext,%sortrole,%roleclass);
515: my $countactive=0;
516: my $inrole=0;
517: my $possiblerole='';
518: foreach $envkey (sort keys %env) {
519: my $button = 1;
520: my $switchserver='';
521: my $roletext;
522: my $sortkey;
523: if ($envkey=~/^user\.role\./) {
524: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
525: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
526: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
527: $tremark='';
528: $tpstart=' ';
529: $tpend=' ';
530: $tfont='#000000';
531: if ($tstart) {
532: $tpstart=&Apache::lonlocal::locallocaltime($tstart);
533: }
534: if ($tend) {
535: $tpend=&Apache::lonlocal::locallocaltime($tend);
536: }
537: if ($env{'request.role'} eq $trolecode) {
538: $tstatus='selected';
539: }
540: my $tbg;
541: if (($tstatus eq 'is')
542: || ($tstatus eq 'selected')
543: || ($tstatus eq 'will')
544: || ($tstatus eq 'future')
545: || ($env{'form.showall'})) {
546: if ($tstatus eq 'is') {
547: $tbg='#77FF77';
548: $tfont='#003300';
549: $possiblerole=$trolecode;
550: $countactive++;
551: } elsif ($tstatus eq 'future') {
552: $tbg='#FFFF77';
553: $button=0;
554: } elsif ($tstatus eq 'will') {
555: $tbg='#FFAA77';
556: $tremark.=&mt('Active at next login. ');
557: } elsif ($tstatus eq 'expired') {
558: $tbg='#FF7777';
559: $tfont='#330000';
560: $button=0;
561: } elsif ($tstatus eq 'will_not') {
562: $tbg='#AAFF77';
563: $tremark.=&mt('Expired after logout. ');
564: } elsif ($tstatus eq 'selected') {
565: $tbg='#11CC55';
566: $tfont='#002200';
567: $inrole=1;
568: $countactive++;
569: $tremark.=&mt('Currently selected. ');
570: }
571: my $trole;
572: if ($role =~ /^cr\//) {
573: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
574: if ($tremark) { $tremark.='<br />'; }
575: $tremark.=&mt('Defined by ').$rauthor.
576: &mt(' at ').$rdomain.'.';
577: }
578: $trole=Apache::lonnet::plaintext($role);
579: my $ttype;
580: my $twhere;
581: my ($tdom,$trest,$tsection)=
582: split(/\//,Apache::lonnet::declutter($where));
583: # First, Co-Authorship roles
584: if (($role eq 'ca') || ($role eq 'aa')) {
585: my $home = &Apache::lonnet::homeserver($trest,$tdom);
586: my $allowed=0;
587: my @ids=&Apache::lonnet::current_machine_ids();
588: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
589: if (!$allowed) {
590: $button=0;
591: $switchserver='otherserver='.$home.'&role='.$trolecode;
592: }
593: #next if ($home eq 'no_host');
594: $home = &Apache::lonnet::hostname($home);
595: $ttype='Construction Space';
596: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
597: ': '.$tdom.'<br />'.
598: ' '.&mt('Server').': '.$home;
599: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
600: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
601: $sortkey=$role."$trest:$tdom";
602: } elsif ($role eq 'au') {
603: # Authors
604: my $home = &Apache::lonnet::homeserver
605: ($env{'user.name'},$env{'user.domain'});
606: my $allowed=0;
607: my @ids=&Apache::lonnet::current_machine_ids();
608: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
609: if (!$allowed) {
610: $button=0;
611: $switchserver='otherserver='.$home.'&role='.$trolecode;
612: }
613: #next if ($home eq 'no_host');
614: $home = &Apache::lonnet::hostname($home);
615: $ttype='Construction Space';
616: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
617: ': '.$home;
618: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
619: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
620: $sortkey=$role;
621: } elsif ($trest) {
622: my $tcourseid=$tdom.'_'.$trest;
623: $ttype = &Apache::loncommon::course_type($tcourseid);
624: $trole = &Apache::lonnet::plaintext($role,$ttype);
625: if ($env{'course.'.$tcourseid.'.description'}) {
626: $twhere=$env{'course.'.$tcourseid.'.description'};
627: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
628: unless ($twhere eq &mt('Currently not available')) {
629: $twhere.=' <font size="-2">'.
630: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
631: '</font>';
632: }
633: } else {
634: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
635: if (%newhash) {
636: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
637: "\0".$envkey;
638: $twhere=$newhash{'description'}.
639: ' <font size="-2">'.
640: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
641: '</font>';
642: $ttype = $newhash{'type'};
643: $trole = &Apache::lonnet::plaintext($role,$ttype);
644: } else {
645: $twhere=&mt('Currently not available');
646: $env{'course.'.$tcourseid.'.description'}=$twhere;
647: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
648: $ttype = 'Unavailable';
649: }
650: }
651: if ($tsection) {
652: $twhere.='<br />'.&mt('Section').': '.$tsection;
653: }
654: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
655: } elsif ($tdom) {
656: $ttype='Domain';
657: $twhere=$tdom;
658: $sortkey=$role.$twhere;
659: } else {
660: $ttype='System';
661: $twhere=&mt('system wide');
662: $sortkey=$role.$twhere;
663: }
664: $roletext.=&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver);
665: $roletext{$envkey}=$roletext;
666: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
667: $sortrole{$sortkey}=$envkey;
668: $roleclass{$envkey}=$ttype;
669: }
670: }
671: }
672: # No active roles
673: if ($countactive==0) {
674: if ($inrole) {
675: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
676: } else {
677: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
678: }
679: $r->print('</form>'.&Apache::loncommon::end_page());
680: return OK;
681: # Is there only one choice?
682: } elsif (($countactive==1) && ($env{'request.role'} eq 'cm')) {
683: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
684: '<input type="hidden" name="'.$possiblerole.'" value="1" />'.
685: '<noscript><br /><input type="submit" name="submit" value="'.&mt('Continue').'" /></noscript>');
686: $r->print("</form>\n");
687: $r->rflush();
688: $r->print('<script type="text/javascript">document.forms.rolechoice.submit();</script>');
689: $r->print(&Apache::loncommon::end_page());
690: return OK;
691: }
692: # More than one possible role
693: # ----------------------------------------------------------------------- Table
694: unless ((!&Apache::lonmenu::show_course()) || ($nochoose)) {
695: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
696: }
697: $r->print('<br /><table id="LC_rolesmenu"><tr>');
698: unless ($nochoose) { $r->print('<th> </th>'); }
699: $r->print('<th>'.&mt('User Role').'</th><th>'.&mt('Extent').
700: '</th><th>'.&mt('Start').'</th><th>'.&mt('End').'</th></tr>'."\n");
701: my $doheaders=-1;
702: foreach my $type ('Domain','Construction Space','Course','Unavailable','System') {
703: my $haverole=0;
704: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
705: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
706: $haverole=1;
707: }
708: }
709: if ($haverole) { $doheaders++; }
710: }
711:
712: if ($env{'environment.recentroles'}) {
713: my %recent_roles =
714: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
715: my $output='';
716: foreach (sort(keys(%recent_roles))) {
717: if (defined($roletext{'user.role.'.$_})) {
718: $output.=$roletext{'user.role.'.$_};
719: if ($_ =~ m-dc\./($match_domain)/-
720: && $dcroles{$1}) {
721: $output .= &allcourses_row($1,'recent').
722: &allcoauthors_row($1,'recent');
723: }
724: } elsif ($numdc > 0) {
725: unless ($_ =~/^error\:/) {
726: $output.=&display_cc_role('user.role.'.$_);
727: }
728: }
729: }
730: if ($output) {
731: $r->print("<tr><td align='center' colspan='5'><font face='arial'>".
732: &mt('Recent Roles')."</font></td>");
733: $r->print($output);
734: $r->print("</tr>");
735: $doheaders ++;
736: }
737: }
738:
739: if ($numdc > 0) {
740: $r->print(&coursepick_jscript());
741: $r->print(&Apache::loncommon::coursebrowser_javascript());
742: }
743: foreach my $type ('Construction Space','Domain','Course','Unavailable','System') {
744: my $output;
745: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
746: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
747: $output.=$roletext{$sortrole{$which}};
748: if ($sortrole{$which} =~ m-dc\./($match_domain)/-) {
749: if ($dcroles{$1}) {
750: $output .= &allcourses_row($1,'').
751: &allcoauthors_row($1,'');
752: }
753: }
754: }
755: }
756: if ($output) {
757: if ($doheaders > 0) {
758: $r->print("<tr>".
759: "<td align='center' colspan='5'><font face='arial'>".&mt($type)."</font></td></tr>");
760: }
761: $r->print($output);
762: }
763: }
764: my $tremark='';
765: my $tfont='#003300';
766: if ($env{'request.role'} eq 'cm') {
767: $r->print('<tr bgcolor="#11CC55">');
768: $tremark=&mt('Currently selected. ');
769: $tfont='#002200';
770: } else {
771: $r->print('<tr bgcolor="#77FF77">');
772: }
773: unless ($nochoose) {
774: if ($env{'request.role'} ne 'cm') {
775: $r->print('<td><input type="submit" value="'.
776: &mt('Select').'" name="cm"></td>');
777: } else {
778: $r->print('<td> </td>');
779: }
780: }
781: $r->print('<td colspan="3"><font color="'.$tfont.'"><span class="LC_rolesinfo">'.&mt('No role specified').
782: '</font></span></td><td><font color="'.$tfont.'">'.$tremark.
783: ' </font></td></tr>'."\n");
784:
785: $r->print('</table>');
786: unless ($nochoose) {
787: $r->print("</form>\n");
788: }
789: # ------------------------------------------------------------ Privileges Info
790: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
791: $r->print('<hr /><h2>Current Privileges</h2>');
792: $r->print(&privileges_info());
793: }
794: $r->print(&Apache::lonnet::getannounce());
795: if ($advanced) {
796: $r->print('<p><small><i>This is LON-CAPA '.
797: $r->dir_config('lonVersion').'</i><br />'.
798: '<a href="/adm/logout">'.&mt('Logout').'</a></small></p>');
799: }
800: $r->print(&Apache::loncommon::end_page());
801: return OK;
802: }
803:
804: sub privileges_info {
805: my ($which) = @_;
806: my $output;
807:
808: $which ||= $env{'request.role'};
809:
810: foreach my $envkey (sort(keys(%env))) {
811: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
812:
813: my $where=$1;
814: my $ttype;
815: my $twhere;
816: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
817: if ($trest) {
818: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
819: $ttype='Construction Space';
820: $twhere='User: '.$trest.', Domain: '.$tdom;
821: } else {
822: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
823: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
824: if ($tsec) {
825: my $sec_type = 'Section';
826: if (exists($env{"user.role.gr.$where"})) {
827: $sec_type = 'Group';
828: }
829: $twhere.=' ('.$sec_type.': '.$tsec.')';
830: }
831: }
832: } elsif ($tdom) {
833: $ttype='Domain';
834: $twhere=$tdom;
835: } else {
836: $ttype='System';
837: $twhere='/';
838: }
839: $output .= "\n<h3>".$ttype.': '.$twhere.'</h3>'."\n<ul>";
840: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
841: next if (!$priv);
842:
843: my ($prv,$restr)=split(/\&/,$priv);
844: my $trestr='';
845: if ($restr ne 'F') {
846: $trestr.=' ('.
847: join(', ',
848: map { &Apache::lonnet::plaintext($_) }
849: (split('',$restr))).') ';
850: }
851: $output .= "\n\t".
852: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
853: }
854: $output .= "\n".'</ul>';
855: }
856: return $output;
857: }
858:
859: sub role_status {
860: my ($rolekey,$then,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
861: my @pwhere = ();
862: if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
863: (undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
864: unless (!defined($$role) || $$role eq '') {
865: $$where=join('.',@pwhere);
866: $$trolecode=$$role.'.'.$$where;
867: ($$tstart,$$tend)=split(/\./,$env{$rolekey});
868: $$tstatus='is';
869: if ($$tstart && $$tstart>$then) {
870: $$tstatus='future';
871: if ($$tstart<$now) { $$tstatus='will'; }
872: }
873: if ($$tend) {
874: if ($$tend<$then) {
875: $$tstatus='expired';
876: } elsif ($$tend<$now) {
877: $$tstatus='will_not';
878: }
879: }
880: }
881: }
882: }
883:
884: sub build_roletext {
885: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver) = @_;
886: my $roletext='<tr bgcolor="'.$tbg.'" class="LC_rolesmenu_'.$tstatus.'">';
887: my $is_dc=($trolecode =~ m/^dc\./);
888: my $rowspan=($is_dc) ? ''
889: : ' rowspan="2" ';
890:
891: unless ($nochoose) {
892: my $buttonname=$trolecode;
893: $buttonname=~s/\W//g;
894: if (!$button) {
895: if ($switchserver) {
896: $roletext.='<td'.$rowspan.'><span class="LC_rolesinfo"><a href="/adm/switchserver?'.
897: $switchserver.'">'.&mt('Switch Server').'</a></span></td>';
898: } else {
899: $roletext.=('<td'.$rowspan.'> </td>');
900: }
901: } elsif ($tstatus eq 'is') {
902: $roletext.='<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
903: &mt('Select').'" onClick="javascript:enterrole(this.form,\''.
904: $trolecode."','".$buttonname.'\');"></td>';
905: } elsif ($tryagain) {
906: $roletext.=
907: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
908: &mt('Try Selecting Again').'" onClick="javascript:enterrole(this.form,\''.
909: $trolecode."','".$buttonname.'\');"></td>';
910: } elsif ($advanced) {
911: $roletext.=
912: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
913: &mt('Re-Initialize').'" onClick="javascript:enterrole(this.form,\''.
914: $trolecode."','".$buttonname.'\');"></td>';
915: } else {
916: $roletext.='<td'.$rowspan.'> </td>';
917: }
918: }
919: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
920: $tremark.=&Apache::lonannounce::showday(time,1,
921: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
922: }
923: $roletext.='<td><font color="'.$tfont.'">'.$trole.
924: '</font></td><td><font color="'.$tfont.'">'.$twhere.
925: '</font></td><td><font color="'.$tfont.'">'.$tpstart.
926: '</font></td><td><font color="'.$tfont.'">'.$tpend.
927: '</font></td></tr>';
928: if (!$is_dc) {
929: $roletext.='<tr bgcolor="'.$tbg.'"><td colspan="4"><font color="'.$tfont.'"><span class="LC_rolesinfo">'.$tremark.
930: '</span> </font></td></tr><tr><td colspan="5" height="3"></td></tr>'."\n";
931: }
932: return $roletext;
933: }
934:
935: sub is_author_homeserver {
936: my ($uname,$udom)=@_;
937: my $home = &Apache::lonnet::homeserver($uname,$udom);
938: my @ids=&Apache::lonnet::current_machine_ids();
939: foreach my $id (@ids) {
940: if ($id eq $home) {
941: if (-e "/home/".$uname."/public_html") {
942: return 1;
943: }
944: }
945: }
946: return 0;
947: }
948:
949: sub check_privs {
950: my ($cdom,$cnum,$then,$now,$checkrole) = @_;
951: my $cckey = 'user.role.'.$checkrole.'./'.$cdom.'/'.$cnum;
952: if ($env{$cckey}) {
953: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
954: &role_status($cckey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
955: unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
956: &set_privileges($cdom,$cnum,$checkrole);
957: }
958: } else {
959: &set_privileges($cdom,$cnum,$checkrole);
960: }
961: }
962:
963: sub check_fordc {
964: my ($dcroles,$then) = @_;
965: my $numdc = 0;
966: if ($env{'user.adv'}) {
967: foreach my $envkey (sort keys %env) {
968: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
969: my $dcdom = $1;
970: my $livedc = 1;
971: my ($tstart,$tend)=split(/\./,$env{$envkey});
972: if ($tstart && $tstart>$then) { $livedc = 0; }
973: if ($tend && $tend <$then) { $livedc = 0; }
974: if ($livedc) {
975: $$dcroles{$dcdom} = $envkey;
976: $numdc++;
977: }
978: }
979: }
980: }
981: return $numdc;
982: }
983:
984: sub adhoc_course_role {
985: my ($then) = @_;
986: my ($cdom,$cnum);
987: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
988: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
989: if (&check_forcc($cdom,$cnum,$then)) {
990: my $setprivs;
991: if (!defined($env{'user.role.'.$env{'form.selectrole'}})) {
992: $setprivs = 1;
993: } else {
994: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.selectrole'}});
995: if (($start && ($start>$then || $start == -1)) ||
996: ($end && $end<$then)) {
997: $setprivs = 1;
998: }
999: }
1000: if ($setprivs) {
1001: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E(/?\w*)$-) {
1002: my $role = $1;
1003: my $custom_role = $2;
1004: my $usec = $3;
1005: if ($role eq 'cr') {
1006: if ($custom_role =~ m-^$match_domain/$match_courseid/\w+$-) {
1007: $role .= $custom_role;
1008: } else {
1009: return;
1010: }
1011: }
1012: my (%userroles,%newrole,%newgroups);
1013: my $area = '/'.$cdom.'/'.$cnum;
1014: my $spec = $role.'.'.$area;
1015: if ($usec ne '') {
1016: $spec .= '/'.$usec;
1017: $area .= '/'.$usec;
1018: }
1019: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1020: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,%newgroups);
1021: my $adhocstart = $then-1;
1022: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1023: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1024: }
1025: }
1026: }
1027: return;
1028: }
1029:
1030: sub check_forcc {
1031: my ($cdom,$cnum,$then) = @_;
1032: my $is_cc;
1033: if ($cdom ne '' && $cnum ne '') {
1034: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1035: my $envkey = 'user.role.cc./'.$cdom.'/'.$cnum;
1036: if (defined($env{$envkey})) {
1037: $is_cc = 1;
1038: my ($tstart,$tend)=split(/\./,$env{$envkey});
1039: if ($tstart && $tstart>$then) { $is_cc = 0; }
1040: if ($tend && $tend <$then) { $is_cc = 0; }
1041: }
1042: }
1043: }
1044: return $is_cc;
1045: }
1046:
1047: sub courselink {
1048: my ($dcdom,$rowtype,$selecttype) = @_;
1049: my $courseform=&Apache::loncommon::selectcourse_link
1050: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1051: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1052: $dcdom,$dcdom,undef);
1053: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1054: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1055: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1056: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1057: return $courseform.$hiddenitems;
1058: }
1059:
1060: sub coursepick_jscript {
1061: my %lt = &Apache::lonlocal::texthash(
1062: plsu => "Please use the 'Select Course' link to open a separate pick course window where you may select the course you wish to enter.",
1063: youc => 'You can only use this screen to select courses in the current domain.',
1064: );
1065: my $verify_script = <<"END";
1066: <script type="text/javascript">
1067: function verifyCoursePick(caller) {
1068: var numbutton = getIndex(caller)
1069: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1070: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1071: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1072: if (pickedCourse != '') {
1073: if (numbutton != -1) {
1074: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1075: document.rolechoice.elements[numbutton+1].name = courseTarget
1076: document.rolechoice.submit()
1077: }
1078: }
1079: else {
1080: alert("$lt{'plsu'}");
1081: }
1082: }
1083: else {
1084: alert("$lt{'youc'}")
1085: }
1086: }
1087: function getIndex(caller) {
1088: for (var i=0;i<document.rolechoice.elements.length;i++) {
1089: if (document.rolechoice.elements[i] == caller) {
1090: return i;
1091: }
1092: }
1093: return -1;
1094: }
1095: </script>
1096: END
1097: return $verify_script;
1098: }
1099:
1100: sub display_cc_role {
1101: my $rolekey = shift;
1102: my $roletext;
1103: my $advanced = $env{'user.adv'};
1104: my $tryagain = $env{'form.tryagain'};
1105: unless ($rolekey =~/^error\:/) {
1106: if ($rolekey =~ m-^user\.role.cc\./($match_domain)/($match_courseid)$-) {
1107: my $tcourseid = $1.'_'.$2;
1108: my $trolecode = 'cc./'.$1.'/'.$2;
1109: my $twhere;
1110: my $ttype;
1111: my $tbg='#77FF77';
1112: my $tfont='#003300';
1113: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1114: if (%newhash) {
1115: $twhere=$newhash{'description'}.
1116: ' <font size="-2">'.
1117: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1,$tfont).
1118: '</font>';
1119: $ttype = $newhash{'type'};
1120: } else {
1121: $twhere=&mt('Currently not available');
1122: $env{'course.'.$tcourseid.'.description'}=$twhere;
1123: }
1124: my $trole = &Apache::lonnet::plaintext('cc',$ttype);
1125: $twhere.="<br />".&mt('Domain').":".$1;
1126: $roletext = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$tfont,$trole,$twhere,'','','',1,'');
1127: }
1128: }
1129: return ($roletext);
1130: }
1131:
1132: sub allcourses_row {
1133: my ($dcdom,$rowtype) = @_;
1134: my $output = '<tr bgcolor="#77FF77">'.
1135: ' <td colspan="5">';
1136: my $selectlink = &courselink($dcdom,$rowtype);
1137: my $ccrole = &Apache::lonnet::plaintext('cc');
1138: $output.= '<span class="LC_rolesinfo">'.
1139: &mt('[_1]: [_2] from domain [_3]',$ccrole,$selectlink,$dcdom).
1140: '</span><br /></tr>'."\n";
1141: return $output;
1142: }
1143:
1144: sub allcoauthors_row {
1145: my ($dcdom,$rowtype) = @_;
1146: my $output = '<tr bgcolor="#77FF77">'.
1147: ' <td colspan="5">';
1148: my $carole = &Apache::lonnet::plaintext('ca');
1149: my $inputlink='<input type="text" size="10" name="adhoccauname'.$rowtype.'.'.$dcdom.'" />';
1150: my $gobutton='<input type="submit" name="adhocca./'.$dcdom.'" value="'.&mt('Go').'" />';
1151: $output.= '<span class="LC_rolesinfo">'.
1152: &mt('[_1]: [_2] in domain [_3] [_4]',$carole,$inputlink,$dcdom,$gobutton).
1153: '</span><br /></tr><tr><td colspan="5" height="3"></td></tr>'."\n";
1154: return $output;
1155: }
1156:
1157: sub recent_filename {
1158: my $area=shift;
1159: return 'nohist_recent_'.&escape($area);
1160: }
1161:
1162: sub set_privileges {
1163: # role can be cc or ca
1164: my ($dcdom,$pickedcourse,$role) = @_;
1165: my $area = '/'.$dcdom.'/'.$pickedcourse;
1166: my $spec = $role.'.'.$area;
1167: my %userroles = &Apache::lonnet::set_arearole($role,$area,'','',
1168: $env{'user.domain'},
1169: $env{'user.name'});
1170: my %ccrole = ();
1171: &Apache::lonnet::standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
1172: my ($author,$adv)= &Apache::lonnet::set_userprivs(\%userroles,\%ccrole);
1173: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1174:
1175: &Apache::lonnet::log($env{'user.domain'},
1176: $env{'user.name'},
1177: $env{'user.home'},
1178: "Role ".$role);
1179: &Apache::lonnet::appenv(
1180: {'request.role' => $spec,
1181: 'request.role.domain' => $dcdom,
1182: 'request.course.sec' => ''});
1183: my $tadv=0;
1184: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1185: &Apache::lonnet::appenv({'request.role.adv' => $tadv});
1186: }
1187:
1188: sub courseloadpage {
1189: my ($courseid) = @_;
1190: my $startpage;
1191: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1192: [$courseid.':courseinit']);
1193: my ($tmp) = %entry_settings;
1194: unless ($tmp =~ /^error: 2 /) {
1195: $startpage = $entry_settings{$courseid.':courseinit'};
1196: }
1197: if ($startpage eq '') {
1198: if (exists($env{'environment.course_init_display'})) {
1199: $startpage = $env{'environment.course_init_display'};
1200: }
1201: }
1202: return $startpage;
1203: }
1204:
1205: 1;
1206: __END__
1207:
1208: =head1 NAME
1209:
1210: Apache::lonroles - User Roles Screen
1211:
1212: =head1 SYNOPSIS
1213:
1214: Invoked by /etc/httpd/conf/srm.conf:
1215:
1216: <Location /adm/roles>
1217: PerlAccessHandler Apache::lonacc
1218: SetHandler perl-script
1219: PerlHandler Apache::lonroles
1220: ErrorDocument 403 /adm/login
1221: ErrorDocument 500 /adm/errorhandler
1222: </Location>
1223:
1224: =head1 OVERVIEW
1225:
1226: =head2 Choosing Roles
1227:
1228: C<lonroles> is a handler that allows a user to switch roles in
1229: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1230: default role that a user has before selecting a role, as widely as
1231: possible, but certain handlers for example need specification which
1232: course they should act on, etc. Both in this scenario, and when the
1233: handler determines via C<lonnet>'s C<&allowed> function that a certain
1234: action is not allowed, C<lonroles> is used as error handler. This
1235: allows the user to select another role which may have permission to do
1236: what they were trying to do. C<lonroles> can also be accessed via the
1237: B<CRS> button in the Remote Control.
1238:
1239: =begin latex
1240:
1241: \begin{figure}
1242: \begin{center}
1243: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1244: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1245: \end{center}
1246: \end{figure}
1247:
1248: =end latex
1249:
1250: =head2 Role Initialization
1251:
1252: 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.
1253:
1254: =head1 INTRODUCTION
1255:
1256: This module enables a user to select what role he wishes to
1257: operate under (instructor, student, teaching assistant, course
1258: coordinator, etc). These roles are pre-established by the actions
1259: of upper-level users.
1260:
1261: This is part of the LearningOnline Network with CAPA project
1262: described at http://www.lon-capa.org.
1263:
1264: =head1 HANDLER SUBROUTINE
1265:
1266: This routine is called by Apache and mod_perl.
1267:
1268: =over 4
1269:
1270: =item *
1271:
1272: Roles Initialization (yes/no)
1273:
1274: =item *
1275:
1276: Get Error Message from Environment
1277:
1278: =item *
1279:
1280: Who is this?
1281:
1282: =item *
1283:
1284: Generate Page Output
1285:
1286: =item *
1287:
1288: Choice or no choice
1289:
1290: =item *
1291:
1292: Table
1293:
1294: =item *
1295:
1296: Privileges
1297:
1298: =back
1299:
1300: =cut
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