1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.205 2008/09/02 02:56:52 raeburn 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: use HTML::Entities;
47:
48:
49: sub redirect_user {
50: my ($r,$title,$url,$msg,$launch_nav) = @_;
51: $msg = $title if (! defined($msg));
52: &Apache::loncommon::content_type($r,'text/html');
53: &Apache::loncommon::no_cache($r);
54: $r->send_http_header;
55: my $swinfo=&Apache::lonmenu::rawconfig();
56: my $navwindow;
57: if ($launch_nav eq 'on') {
58: $navwindow.=&Apache::lonnavdisplay::launch_win('now',undef,undef,
59: ($url =~ m-^/adm/whatsnew-));
60: } else {
61: $navwindow.=&Apache::lonnavmaps::close();
62: }
63: my $start_page = &Apache::loncommon::start_page('Switching Role',undef,
64: {'redirect' => [1,$url],});
65: my $end_page = &Apache::loncommon::end_page();
66:
67: # Note to style police:
68: # This must only replace the spaces, nothing else, or it bombs elsewhere.
69: $url=~s/ /\%20/g;
70: $r->print(<<ENDREDIR);
71: $start_page
72: <script type="text/javascript">
73: $swinfo
74: </script>
75: $navwindow
76: <h1>$msg</h1>
77: $end_page
78: ENDREDIR
79: return;
80: }
81:
82: sub error_page {
83: my ($r,$error,$dest)=@_;
84: &Apache::loncommon::content_type($r,'text/html');
85: &Apache::loncommon::no_cache($r);
86: $r->send_http_header;
87: return OK if $r->header_only;
88: $r->print(&Apache::loncommon::start_page('Problems during Course Initialization').
89: '<script type="text/javascript">'.
90: &Apache::lonmenu::rawconfig().'</script>'.
91: '<p>'.&mt('The following problems occurred:').
92: $error.
93: '</p><br /><a href="'.$dest.'">'.&mt('Continue').'</a>'.
94: &Apache::loncommon::end_page());
95: }
96:
97: sub handler {
98:
99: my $r = shift;
100:
101: my $now=time;
102: my $then=$env{'user.login.time'};
103: my $envkey;
104: my %dcroles = ();
105: my $numdc = &check_fordc(\%dcroles,$then);
106: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
107:
108: # ================================================================== Roles Init
109: if ($env{'form.selectrole'}) {
110:
111: my $locknum=&Apache::lonnet::get_locks();
112: if ($locknum) { return 409; }
113:
114: if ($env{'form.newrole'}) {
115: $env{'form.'.$env{'form.newrole'}}=1;
116: }
117: if ($env{'request.course.id'}) {
118: # Check if user is CC trying to select a course role
119: if ($env{'form.switchrole'}) {
120: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
121: &adhoc_course_role($then);
122: }
123: }
124: my %temp=('logout_'.$env{'request.course.id'} => time);
125: &Apache::lonnet::put('email_status',\%temp);
126: &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
127: }
128: &Apache::lonnet::appenv({"request.course.id" => '',
129: "request.course.fn" => '',
130: "request.course.uri" => '',
131: "request.course.sec" => '',
132: "request.role" => 'cm',
133: "request.role.adv" => $env{'user.adv'},
134: "request.role.domain" => $env{'user.domain'}});
135: # Check if user is a DC trying to enter a course or author space and needs privs to be created
136: if ($numdc > 0) {
137: foreach my $envkey (keys %env) {
138: # Is this an ad-hoc CC-role?
139: if (my ($domain,$coursenum) =
140: ($envkey =~ m-^form\.cc\./($match_domain)/($match_courseid)$-)) {
141: if ($dcroles{$domain}) {
142: &check_privs($domain,$coursenum,$then,$now,'cc');
143: }
144: last;
145: }
146: # Is this an ad-hoc CA-role?
147: if (my ($domain,$user) =
148: ($envkey =~ m-^form\.ca\./($match_domain)/($match_username)$-)) {
149: # Check if author blocked ca-access
150: my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],$domain,$user);
151: if ($blocked{'domcoord.author'} eq 'blocked') {
152: my %roleshash = &Apache::lonnet::get_my_roles($user,$domain);
153: if (!defined($roleshash{$env{'user.name'}.':'.$env{'user.domain'}.':ca'})) {
154: delete($env{$envkey});
155: $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
156: last;
157: }
158: }
159: if ($dcroles{$domain}) {
160: my ($server_status,$home) = &check_author_homeserver($user,$domain);
161: if (($server_status eq 'ok') || ($server_status eq 'switchserver')) {
162: &check_privs($domain,$user,$then,$now,'ca');
163: if ($server_status eq 'switchserver') {
164: my $trolecode = 'ca./'.$domain.'/'.$user;
165: my $switchserver = '/adm/switchserver?'
166: .'otherserver='.$home.'&role='.$trolecode;
167: $r->internal_redirect($switchserver);
168: }
169: } else {
170: delete($env{$envkey});
171: }
172: } else {
173: delete($env{$envkey});
174: }
175: last;
176: }
177: }
178: }
179:
180: foreach $envkey (keys %env) {
181: next if ($envkey!~/^user\.role\./);
182: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
183: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
184: if ($env{'form.'.$trolecode}) {
185: if ($tstatus eq 'is') {
186: $where=~s/^\///;
187: my ($cdom,$cnum,$csec)=split(/\//,$where);
188: # check for course groups
189: my %coursegroups = &Apache::lonnet::get_active_groups(
190: $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
191: my $cgrps = join(':',keys(%coursegroups));
192:
193: # store role if recent_role list being kept
194: if ($env{'environment.recentroles'}) {
195: my %frozen_roles =
196: &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
197: &Apache::lonhtmlcommon::store_recent('roles',
198: $trolecode,' ',$frozen_roles{$trolecode});
199: }
200:
201:
202: # check for keyed access
203: if (($role eq 'st') &&
204: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
205: # who is key authority?
206: my $authdom=$cdom;
207: my $authnum=$cnum;
208: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
209: ($authnum,$authdom)=
210: split(/:/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
211: }
212: # check with key authority
213: unless (&Apache::lonnet::validate_access_key(
214: $env{'environment.key.'.$cdom.'_'.$cnum},
215: $authdom,$authnum)) {
216: # there is no valid key
217: if ($env{'form.newkey'}) {
218: # student attempts to register a new key
219: &Apache::loncommon::content_type($r,'text/html');
220: &Apache::loncommon::no_cache($r);
221: $r->send_http_header;
222: my $swinfo=&Apache::lonmenu::rawconfig();
223: my $start_page=&Apache::loncommon::start_page
224: ('Verifying Access Key to Unlock this Course');
225: my $end_page=&Apache::loncommon::end_page();
226: my $buttontext=&mt('Enter Course');
227: my $message=&mt('Successfully registered key');
228: my $assignresult=
229: &Apache::lonnet::assign_access_key(
230: $env{'form.newkey'},
231: $authdom,$authnum,
232: $cdom,$cnum,
233: $env{'user.domain'},
234: $env{'user.name'},
235: &mt('Assigned from [_1] at [_2] for [_3]'
236: ,$ENV{'REMOTE_ADDR'}
237: ,&Apache::lonlocal::locallocaltime()
238: ,$trolecode)
239: );
240: unless ($assignresult eq 'ok') {
241: $assignresult=~s/^error\:\s*//;
242: $message=&mt($assignresult).
243: '<br /><a href="/adm/logout">'.
244: &mt('Logout').'</a>';
245: $buttontext=&mt('Re-Enter Key');
246: }
247: $r->print(<<ENDENTEREDKEY);
248: $start_page
249: <script type="text/javascript">
250: $swinfo
251: </script>
252: <form method="post">
253: <input type="hidden" name="selectrole" value="1" />
254: <input type="hidden" name="$trolecode" value="1" />
255: <font size="+2">$message</font><br />
256: <input type="submit" value="$buttontext" />
257: </form>
258: $end_page
259: ENDENTEREDKEY
260: return OK;
261: } else {
262: # print form to enter a new key
263: &Apache::loncommon::content_type($r,'text/html');
264: &Apache::loncommon::no_cache($r);
265: $r->send_http_header;
266: my $swinfo=&Apache::lonmenu::rawconfig();
267: my $start_page=&Apache::loncommon::start_page
268: ('Enter Access Key to Unlock this Course');
269: my $end_page=&Apache::loncommon::end_page();
270: $r->print(<<ENDENTERKEY);
271: $start_page
272: <script type="text/javascript">
273: $swinfo
274: </script>
275: <form method="post">
276: <input type="hidden" name="selectrole" value="1" />
277: <input type="hidden" name="$trolecode" value="1" />
278: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
279: <input type="submit" value="Enter key" />
280: </form>
281: $end_page
282: ENDENTERKEY
283: return OK;
284: }
285: }
286: }
287: &Apache::lonnet::log($env{'user.domain'},
288: $env{'user.name'},
289: $env{'user.home'},
290: "Role ".$trolecode);
291:
292: &Apache::lonnet::appenv(
293: {'request.role' => $trolecode,
294: 'request.role.domain' => $cdom,
295: 'request.course.sec' => $csec,
296: 'request.course.groups' => $cgrps});
297: my $tadv=0;
298:
299: if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
300: my $msg;
301: my ($furl,$ferr)=
302: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
303: if (($env{'form.orgurl'}) &&
304: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
305: my $dest=$env{'form.orgurl'};
306: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
307: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
308: if (($ferr) && ($tadv)) {
309: &error_page($r,$ferr,$dest);
310: } else {
311: $r->internal_redirect($dest);
312: }
313: return OK;
314: } else {
315: if (!$env{'request.course.id'}) {
316: &Apache::lonnet::appenv(
317: {"request.course.id" => $cdom.'_'.$cnum});
318: $furl='/adm/roles?tryagain=1';
319: $msg=
320: '<h1><span class="LC_error">'.
321: &mt('Could not initialize [_1] at this time.',
322: $env{'course.'.$cdom.'_'.$cnum.'.description'}).
323: '</span></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
324: }
325: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
326: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
327:
328: if (($ferr) && ($tadv)) {
329: &error_page($r,$ferr,$furl);
330: } else {
331: # Check to see if the user is a CC entering a course
332: # for the first time
333: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
334: if (substr($courseid, 0, 1) eq '/') {
335: $courseid = substr($courseid, 1);
336: }
337: $courseid =~ s/\//_/;
338: if ($role eq 'cc' && $env{'course.' . $courseid .
339: '.course.helper.not.run'}) {
340: $furl = "/adm/helper/course.initialization.helper";
341: # Send the user to the course they selected
342: } elsif ($env{'request.course.id'}) {
343: if ($env{'form.destinationurl'}) {
344: my $dest = $env{'form.destinationurl'};
345: if ($env{'form.destsymb'} ne '') {
346: my $esc_symb = &HTML::Entities::encode($env{'form.destsymb'},'"<>&');
347: $dest .= '?symb='.$esc_symb;
348: }
349: &redirect_user($r,&mt('Entering [_1]',
350: $env{'course.'.$courseid.'.description'}),
351: $dest,$msg,
352: $env{'environment.remotenavmap'});
353: return OK;
354: }
355: if (&Apache::lonnet::allowed('whn',
356: $env{'request.course.id'})
357: || &Apache::lonnet::allowed('whn',
358: $env{'request.course.id'}.'/'
359: .$env{'request.course.sec'})
360: ) {
361: my $startpage = &courseloadpage($courseid);
362: unless ($startpage eq 'firstres') {
363: $msg = &mt('Entering [_1] ...',
364: $env{'course.'.$courseid.'.description'});
365: &redirect_user($r,&mt('New in course'),
366: '/adm/whatsnew?refpage=start',$msg,
367: $env{'environment.remotenavmap'});
368: return OK;
369: }
370: }
371: }
372: # Are we allowed to look at the first resource?
373: if ($furl !~ m|^/adm/|) {
374: # Guess not ...
375: $furl=&Apache::lonpageflip::first_accessible_resource();
376: }
377: $msg = &mt('Entering [_1] ...',
378: $env{'course.'.$courseid.'.description'});
379: &redirect_user($r,&mt('Entering [_1]',
380: $env{'course.'.$courseid.'.description'}),
381: $furl,$msg,
382: $env{'environment.remotenavmap'});
383: }
384: return OK;
385: }
386: }
387: #
388: # Send the user to the construction space they selected
389: if ($role =~ /^(au|ca|aa)$/) {
390: my $redirect_url = '/priv/';
391: if ($role eq 'au') {
392: $redirect_url.=$env{'user.name'};
393: } else {
394: $where =~ /\/(.*)$/;
395: $redirect_url .= $1;
396: }
397: $redirect_url .= '/';
398: &redirect_user($r,&mt('Entering Construction Space'),
399: $redirect_url);
400: return OK;
401: }
402: if ($role eq 'dc') {
403: my $redirect_url = '/adm/menu/';
404: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
405: $redirect_url);
406: return OK;
407: }
408: }
409: }
410: }
411: }
412:
413:
414: # =============================================================== No Roles Init
415:
416: &Apache::loncommon::content_type($r,'text/html');
417: &Apache::loncommon::no_cache($r);
418: $r->send_http_header;
419: return OK if $r->header_only;
420:
421: my $swinfo=&Apache::lonmenu::rawconfig();
422: my $start_page=&Apache::loncommon::start_page('User Roles');
423: my $standby=&mt('Role selected. Please stand by.');
424: $standby=~s/\n/\\n/g;
425: 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 />';
426:
427: $r->print(<<ENDHEADER);
428: $start_page
429: <br />
430: <noscript>
431: $noscript
432: </noscript>
433: <script type="text/javascript">
434: $swinfo
435: window.focus();
436:
437: active=true;
438:
439: function enterrole (thisform,rolecode,buttonname) {
440: if (active) {
441: active=false;
442: document.title='$standby';
443: window.status='$standby';
444: thisform.newrole.value=rolecode;
445: thisform.submit();
446: } else {
447: alert('$standby');
448: }
449: }
450: </script>
451: ENDHEADER
452:
453: # ------------------------------------------ Get Error Message from Environment
454:
455: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
456: if ($env{'user.error.msg'}) {
457: $r->log_reason(
458: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
459: }
460:
461: # ------------------------------------------------- Can this user re-init, etc?
462:
463: my $advanced=$env{'user.adv'};
464: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
465: my $tryagain=$env{'form.tryagain'};
466:
467: # -------------------------------------------------------- Generate Page Output
468: # --------------------------------------------------------------- Error Header?
469: if ($error) {
470: $r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
471: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
472: if ($priv ne '') {
473: $r->print(&mt('Access : ').&Apache::lonnet::plaintext($priv)."\n");
474: }
475: if ($fn ne '') {
476: $r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
477: }
478: if ($msg ne '') {
479: $r->print(&mt('Action : ').$msg."\n");
480: }
481: $r->print("</pre><hr />");
482: my $url=$fn;
483: my $last;
484: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
485: &GDBM_READER(),0640)) {
486: $last=$hash{'last_known'};
487: untie(%hash);
488: }
489: if ($last) { $fn.='?symb='.&escape($last); }
490:
491: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
492: &Apache::lonenc::check_encrypt($fn));
493: } else {
494: if ($env{'user.error.msg'}) {
495: $r->print(
496: '<h3><span class="LC_error">'.
497: &mt('You need to choose another user role or enter a specific course for this function').'</span></h3>');
498: }
499: }
500: # -------------------------------------------------------- Choice or no choice?
501: if ($nochoose) {
502: $r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
503: &mt('This action is currently not authorized.').'</span>'.
504: &Apache::loncommon::end_page());
505: return OK;
506: } else {
507: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
508: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
509: }
510: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
511: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
512: $r->print('<input type="hidden" name="selectrole" value="1" />');
513: $r->print('<input type="hidden" name="newrole" value="" />');
514: }
515: my (%roletext,%sortrole,%roleclass);
516: my $countactive=0;
517: my $countfuture=0;
518: my $countwill=0;
519: my $inrole=0;
520: my $possiblerole='';
521: my %futureroles;
522: my %roles_nextlogin;
523: foreach $envkey (sort keys %env) {
524: my $button = 1;
525: my $switchserver='';
526: my $roletext;
527: my $sortkey;
528: if ($envkey=~/^user\.role\./) {
529: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
530: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
531: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
532: $tremark='';
533: $tpstart=' ';
534: $tpend=' ';
535: $tfont='#000000';
536: if ($tstart) {
537: $tpstart=&Apache::lonlocal::locallocaltime($tstart);
538: }
539: if ($tend) {
540: $tpend=&Apache::lonlocal::locallocaltime($tend);
541: }
542: if ($env{'request.role'} eq $trolecode) {
543: $tstatus='selected';
544: }
545: my $tbg;
546: if (($tstatus eq 'is')
547: || ($tstatus eq 'selected')
548: || ($tstatus eq 'will')
549: || ($tstatus eq 'future')
550: || ($env{'form.showall'})) {
551: if ($tstatus eq 'is') {
552: $tbg='#77FF77';
553: $tfont='#003300';
554: $possiblerole=$trolecode;
555: $countactive++;
556: } elsif ($tstatus eq 'future') {
557: $tbg='#FFFF77';
558: $button=0;
559: $futureroles{$trolecode} = $tstart.':'.$tend;
560: $countfuture ++;
561: } elsif ($tstatus eq 'will') {
562: $tbg='#FFAA77';
563: $tremark.=&mt('Active at next login.').' ';
564: $roles_nextlogin{$trolecode} = $tstart.':'.$tend;
565: $countwill ++;
566: } elsif ($tstatus eq 'expired') {
567: $tbg='#FF7777';
568: $tfont='#330000';
569: $button=0;
570: } elsif ($tstatus eq 'will_not') {
571: $tbg='#AAFF77';
572: $tremark.=&mt('Expired after logout.').' ';
573: } elsif ($tstatus eq 'selected') {
574: $tbg='#11CC55';
575: $tfont='#002200';
576: $inrole=1;
577: $countactive++;
578: $tremark.=&mt('Currently selected.').' ';
579: }
580: my $trole;
581: if ($role =~ /^cr\//) {
582: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
583: if ($tremark) { $tremark.='<br />'; }
584: $tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
585: }
586: $trole=Apache::lonnet::plaintext($role);
587: my $ttype;
588: my $twhere;
589: my ($tdom,$trest,$tsection)=
590: split(/\//,Apache::lonnet::declutter($where));
591: # First, Co-Authorship roles
592: if (($role eq 'ca') || ($role eq 'aa')) {
593: my $home = &Apache::lonnet::homeserver($trest,$tdom);
594: my $allowed=0;
595: my @ids=&Apache::lonnet::current_machine_ids();
596: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
597: if (!$allowed) {
598: $button=0;
599: $switchserver='otherserver='.$home.'&role='.$trolecode;
600: }
601: #next if ($home eq 'no_host');
602: $home = &Apache::lonnet::hostname($home);
603: $ttype='Construction Space';
604: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
605: ': '.$tdom.'<br />'.
606: ' '.&mt('Server').': '.$home;
607: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
608: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
609: $sortkey=$role."$trest:$tdom";
610: } elsif ($role eq 'au') {
611: # Authors
612: my $home = &Apache::lonnet::homeserver
613: ($env{'user.name'},$env{'user.domain'});
614: my $allowed=0;
615: my @ids=&Apache::lonnet::current_machine_ids();
616: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
617: if (!$allowed) {
618: $button=0;
619: $switchserver='otherserver='.$home.'&role='.$trolecode;
620: }
621: #next if ($home eq 'no_host');
622: $home = &Apache::lonnet::hostname($home);
623: $ttype='Construction Space';
624: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
625: ': '.$home;
626: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
627: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
628: $sortkey=$role;
629: } elsif ($trest) {
630: my $tcourseid=$tdom.'_'.$trest;
631: $ttype = &Apache::loncommon::course_type($tcourseid);
632: $trole = &Apache::lonnet::plaintext($role,$ttype);
633: if ($env{'course.'.$tcourseid.'.description'}) {
634: $twhere=$env{'course.'.$tcourseid.'.description'};
635: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
636: unless ($twhere eq &mt('Currently not available')) {
637: $twhere.=' <font size="-2">'.
638: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
639: '</font>';
640: }
641: } else {
642: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
643: if (%newhash) {
644: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
645: "\0".$envkey;
646: $twhere=$newhash{'description'}.
647: ' <font size="-2">'.
648: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
649: '</font>';
650: $ttype = $newhash{'type'};
651: $trole = &Apache::lonnet::plaintext($role,$ttype);
652: } else {
653: $twhere=&mt('Currently not available');
654: $env{'course.'.$tcourseid.'.description'}=$twhere;
655: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
656: $ttype = 'Unavailable';
657: }
658: }
659: if ($tsection) {
660: $twhere.='<br />'.&mt('Section').': '.$tsection;
661: }
662: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
663: } elsif ($tdom) {
664: $ttype='Domain';
665: $twhere=$tdom;
666: $sortkey=$role.$twhere;
667: } else {
668: $ttype='System';
669: $twhere=&mt('system wide');
670: $sortkey=$role.$twhere;
671: }
672: $roletext.=&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver);
673: $roletext{$envkey}=$roletext;
674: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
675: $sortrole{$sortkey}=$envkey;
676: $roleclass{$envkey}=$ttype;
677: }
678: }
679: }
680: if ($env{'user.adv'}) {
681: $r->print(
682: '<br /><span class="LC_rolesinfo"><label>'.&mt('Show all roles').': <input type="checkbox" name="showall"');
683: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
684: $r->print(' /></label><input type="submit" value="'.&mt('Display').'" /></span>');
685: } else {
686: if ($countactive > 0) {
687: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
688: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
689: $r->print('<p>'.&mt('[_1]Visit the [_2]Course Catalog[_3] to view all [_4] LON-CAPA courses.','<b>','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a></b>',$domdesc).'<br />'.&mt('If a course is [_1]not[_2] in your list of current courses below, you may be able to enroll if self-enrollment is permitted.','<b>','</b>').'</p>');
690: }
691: }
692:
693: # No active roles
694: if ($countactive==0) {
695: if ($inrole) {
696: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
697: } else {
698: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
699: }
700: &findcourse_advice($r);
701: $r->print('</form>');
702: if ($countfuture) {
703: $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
704: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
705: $nochoose);
706: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
707: \%roletext);
708: my $tremark='';
709: my $tfont='#003300';
710: if ($env{'request.role'} eq 'cm') {
711: $r->print('<tr bgcolor="#11CC55">');
712: $tremark=&mt('Currently selected.').' ';
713: $tfont='#002200';
714: } else {
715: $r->print('<tr bgcolor="#77FF77">');
716: }
717: $r->print('<td></td><td colspan="3"><font color="'.$tfont.'"><span class="LC_rolesinfo">'.&mt('No role specified').
718: '</span></font></td><td><font color="'.$tfont.'">'.$tremark.
719: ' </font></td></tr>'."\n");
720:
721: $r->print('</table>');
722: }
723: $r->print(&Apache::loncommon::end_page());
724: return OK;
725: # Is there only one choice?
726: } elsif ($countactive==1) {
727: my $needs_switchserver;
728: if ($env{'user.author'}) {
729: $needs_switchserver = &check_needs_switchserver($possiblerole);
730: }
731: if ((!$needs_switchserver) && ($env{'request.role'} eq 'cm')) {
732: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
733: '<input type="hidden" name="'.$possiblerole.'" value="1" />'.
734: '<noscript><br /><input type="submit" name="submit" value="'.&mt('Continue').'" /></noscript>');
735: $r->print("</form>\n");
736: $r->rflush();
737: $r->print('<script type="text/javascript">document.forms.rolechoice.submit();</script>');
738: $r->print(&Apache::loncommon::end_page());
739: return OK;
740: }
741: if ($needs_switchserver) {
742: $r->print("<h2>".&mt('Server Switch Required')."</h2>\n".
743: &mt('Construction Space access is only available from '.
744: 'the home server of the corresponding Author.').'<br />'.
745: &mt("Click the 'Switch Server' link to go there.").'<br />');
746: }
747: }
748: # More than one possible role
749: # ----------------------------------------------------------------------- Table
750: unless ((!&Apache::lonmenu::show_course()) || ($nochoose) || ($countactive==1)) {
751: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
752: }
753: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
754: if ($env{'environment.recentroles'}) {
755: my %recent_roles =
756: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
757: my $output='';
758: foreach (sort(keys(%recent_roles))) {
759: if (defined($roletext{'user.role.'.$_})) {
760: $output.=$roletext{'user.role.'.$_};
761: if ($_ =~ m-dc\./($match_domain)/-
762: && $dcroles{$1}) {
763: $output .= &adhoc_roles_row($1,'recent');
764: }
765: } elsif ($numdc > 0) {
766: unless ($_ =~/^error\:/) {
767: $output.=&display_cc_role('user.role.'.$_);
768: }
769: }
770: }
771: if ($output) {
772: $r->print("<tr><td align='center' colspan='5'><font face='arial'>".
773: &mt('Recent Roles')."</font></td></tr>");
774: $r->print($output);
775: $doheaders ++;
776: }
777: }
778:
779: if ($numdc > 0) {
780: $r->print(&coursepick_jscript());
781: $r->print(&Apache::loncommon::coursebrowser_javascript().
782: &Apache::loncommon::authorbrowser_javascript());
783: }
784: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
785: if ($countactive > 1) {
786: my $tremark='';
787: my $tfont='#003300';
788: if ($env{'request.role'} eq 'cm') {
789: $r->print('<tr bgcolor="#11CC55">');
790: $tremark=&mt('Currently selected.').' ';
791: $tfont='#002200';
792: } else {
793: $r->print('<tr bgcolor="#77FF77">');
794: }
795: unless ($nochoose) {
796: if ($env{'request.role'} ne 'cm') {
797: $r->print('<td><input type="submit" value="'.
798: &mt('Select').'" name="cm" /></td>');
799: } else {
800: $r->print('<td> </td>');
801: }
802: }
803: $r->print('<td colspan="3"><font color="'.$tfont.'"><span class="LC_rolesinfo">'.&mt('No role specified').
804: '</span></font></td><td><font color="'.$tfont.'">'.$tremark.
805: ' </font></td></tr>'."\n");
806: }
807: $r->print('</table>');
808: unless ($nochoose) {
809: $r->print("</form>\n");
810: }
811: # ------------------------------------------------------------ Privileges Info
812: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
813: $r->print('<hr /><h2>Current Privileges</h2>');
814: $r->print(&privileges_info());
815: }
816: $r->print(&Apache::lonnet::getannounce());
817: if ($advanced) {
818: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
819: $r->print('<p><small><i>'
820: .&mt('This is LON-CAPA [_1]',$r->dir_config('lonVersion'))
821: .'</i><br />'
822: .'<a href="/adm/logout">'.&mt('Logout').'</a> '
823: .'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
824: .&mt('Course Catalog')
825: .'</small></p>');
826: }
827: $r->print(&Apache::loncommon::end_page());
828: return OK;
829: }
830:
831: sub roletable_headers {
832: my ($r,$roleclass,$sortrole,$nochoose) = @_;
833: my $doheaders;
834: if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
835: $r->print('<br /><table id="LC_rolesmenu"><tr>');
836: if (!$nochoose) { $r->print('<th> </th>'); }
837: $r->print('<th>'.&mt('User Role').'</th><th>'.&mt('Extent')
838: .'</th><th>'.&mt('Start').'</th><th>'.&mt('End')
839: .'</th></tr>'."\n");
840: $doheaders=-1;
841: my @roletypes = &roletypes();
842: foreach my $type (@roletypes) {
843: my $haverole=0;
844: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
845: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
846: $haverole=1;
847: }
848: }
849: if ($haverole) { $doheaders++; }
850: }
851: }
852: return $doheaders;
853: }
854:
855: sub roletypes {
856: my @types = ('Domain','Construction Space','Course','Unavailable','System');
857: return @types;
858: }
859:
860: sub print_rolerows {
861: my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
862: if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
863: my @types = &roletypes();
864: foreach my $type (@types) {
865: my $output;
866: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
867: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
868: if (ref($roletext) eq 'HASH') {
869: $output.=$roletext->{$sortrole->{$which}};
870: if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
871: if (ref($dcroles) eq 'HASH') {
872: if ($dcroles->{$1}) {
873: $output .= &adhoc_roles_row($1,'');
874: }
875: }
876: }
877: }
878: }
879: }
880: if ($output) {
881: if ($doheaders > 0) {
882: $r->print("<tr>".
883: "<td align='center' colspan='5'><font face='arial'>".
884: &mt($type)."</font></td></tr>");
885: }
886: $r->print($output);
887: }
888: }
889: }
890: }
891:
892: sub findcourse_advice {
893: my ($r) = @_;
894: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
895: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
896: if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
897: $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
898: <ul>
899: <li>'.&mt('The course has yet to be created.').'</li>
900: <li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
901: <li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
902: <li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
903: <li>'.&mt('You registered for the course recently and there is a time lag between the time you register, and the time this information becomes available for the update of LON-CAPA course rosters.').'</li>
904: </ul>');
905: } else {
906: $r->print(&mt('If you were expecting to see an active role listed for a particular course, that course may not have been created yet.').'<br />');
907: }
908: $r->print('<p>'.&mt('The [_1]Course Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created.','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a>',$domdesc).'<br />');
909: $r->print(&mt('You can search the course catalog for courses which permit self-enrollment, if you would like to enroll in a course.').'</p>');
910: return;
911: }
912:
913: sub privileges_info {
914: my ($which) = @_;
915: my $output;
916:
917: $which ||= $env{'request.role'};
918:
919: foreach my $envkey (sort(keys(%env))) {
920: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
921:
922: my $where=$1;
923: my $ttype;
924: my $twhere;
925: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
926: if ($trest) {
927: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
928: $ttype='Construction Space';
929: $twhere='User: '.$trest.', Domain: '.$tdom;
930: } else {
931: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
932: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
933: if ($tsec) {
934: my $sec_type = 'Section';
935: if (exists($env{"user.role.gr.$where"})) {
936: $sec_type = 'Group';
937: }
938: $twhere.=' ('.$sec_type.': '.$tsec.')';
939: }
940: }
941: } elsif ($tdom) {
942: $ttype='Domain';
943: $twhere=$tdom;
944: } else {
945: $ttype='System';
946: $twhere='/';
947: }
948: $output .= "\n<h3>".&mt($ttype).': '.$twhere.'</h3>'."\n<ul>";
949: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
950: next if (!$priv);
951:
952: my ($prv,$restr)=split(/\&/,$priv);
953: my $trestr='';
954: if ($restr ne 'F') {
955: $trestr.=' ('.
956: join(', ',
957: map { &Apache::lonnet::plaintext($_) }
958: (split('',$restr))).') ';
959: }
960: $output .= "\n\t".
961: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
962: }
963: $output .= "\n".'</ul>';
964: }
965: return $output;
966: }
967:
968: sub role_status {
969: my ($rolekey,$then,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
970: my @pwhere = ();
971: if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
972: (undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
973: unless (!defined($$role) || $$role eq '') {
974: $$where=join('.',@pwhere);
975: $$trolecode=$$role.'.'.$$where;
976: ($$tstart,$$tend)=split(/\./,$env{$rolekey});
977: $$tstatus='is';
978: if ($$tstart && $$tstart>$then) {
979: $$tstatus='future';
980: if ($$tstart<$now) { $$tstatus='will'; }
981: }
982: if ($$tend) {
983: if ($$tend<$then) {
984: $$tstatus='expired';
985: } elsif ($$tend<$now) {
986: $$tstatus='will_not';
987: }
988: }
989: }
990: }
991: }
992:
993: sub build_roletext {
994: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver) = @_;
995: my $roletext='<tr bgcolor="'.$tbg.'" class="LC_rolesmenu_'.$tstatus.'">';
996: my $is_dc=($trolecode =~ m/^dc\./);
997: my $rowspan=($is_dc) ? ''
998: : ' rowspan="2" ';
999:
1000: unless ($nochoose) {
1001: my $buttonname=$trolecode;
1002: $buttonname=~s/\W//g;
1003: if (!$button) {
1004: if ($switchserver) {
1005: $roletext.='<td'.$rowspan.'><span class="LC_rolesinfo"><a href="/adm/switchserver?'.
1006: $switchserver.'">'.&mt('Switch Server').'</a></span></td>';
1007: } else {
1008: $roletext.=('<td'.$rowspan.'> </td>');
1009: }
1010: } elsif ($tstatus eq 'is') {
1011: $roletext.='<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
1012: &mt('Select').'" onClick="javascript:enterrole(this.form,\''.
1013: $trolecode."','".$buttonname.'\');" /></td>';
1014: } elsif ($tryagain) {
1015: $roletext.=
1016: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
1017: &mt('Try Selecting Again').'" onClick="javascript:enterrole(this.form,\''.
1018: $trolecode."','".$buttonname.'\');" /></td>';
1019: } elsif ($advanced) {
1020: $roletext.=
1021: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
1022: &mt('Re-Initialize').'" onClick="javascript:enterrole(this.form,\''.
1023: $trolecode."','".$buttonname.'\');" /></td>';
1024: } else {
1025: $roletext.='<td'.$rowspan.'> </td>';
1026: }
1027: }
1028: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
1029: $tremark.=&Apache::lonannounce::showday(time,1,
1030: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
1031: }
1032: $roletext.='<td><font color="'.$tfont.'">'.$trole.
1033: '</font></td><td><font color="'.$tfont.'">'.$twhere.
1034: '</font></td><td><font color="'.$tfont.'">'.$tpstart.
1035: '</font></td><td><font color="'.$tfont.'">'.$tpend.
1036: '</font></td></tr>';
1037: if (!$is_dc) {
1038: $roletext.='<tr bgcolor="'.$tbg.'"><td colspan="4"><font color="'.$tfont.'"><span class="LC_rolesinfo">'.$tremark.
1039: '</span> </font></td></tr><tr><td colspan="5" height="3"></td></tr>'."\n";
1040: }
1041: return $roletext;
1042: }
1043:
1044: sub check_needs_switchserver {
1045: my ($possiblerole) = @_;
1046: my $needs_switchserver;
1047: my ($role,$where) = split(/\./,$possiblerole,2);
1048: my (undef,$tdom,$twho) = split(/\//,$where);
1049: my ($server_status,$home);
1050: if (($role eq 'ca') || ($role eq 'aa')) {
1051: ($server_status,$home) = &check_author_homeserver($twho,$tdom);
1052: } else {
1053: ($server_status,$home) = &check_author_homeserver($env{'user.name'},
1054: $env{'user.domain'});
1055: }
1056: if ($server_status eq 'switchserver') {
1057: $needs_switchserver = 1;
1058: }
1059: return $needs_switchserver;
1060: }
1061:
1062: sub check_author_homeserver {
1063: my ($uname,$udom)=@_;
1064: if (($uname eq '') || ($udom eq '')) {
1065: return ('fail','');
1066: }
1067: my $home = &Apache::lonnet::homeserver($uname,$udom);
1068: if (&Apache::lonnet::host_domain($home) ne $udom) {
1069: return ('fail',$home);
1070: }
1071: my @ids=&Apache::lonnet::current_machine_ids();
1072: if (grep(/^\Q$home\E$/,@ids)) {
1073: return ('ok',$home);
1074: } else {
1075: return ('switchserver',$home);
1076: }
1077: }
1078:
1079: sub check_privs {
1080: my ($cdom,$cnum,$then,$now,$checkrole) = @_;
1081: my $cckey = 'user.role.'.$checkrole.'./'.$cdom.'/'.$cnum;
1082: if ($env{$cckey}) {
1083: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
1084: &role_status($cckey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
1085: unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
1086: &set_privileges($cdom,$cnum,$checkrole);
1087: }
1088: } else {
1089: &set_privileges($cdom,$cnum,$checkrole);
1090: }
1091: }
1092:
1093: sub check_fordc {
1094: my ($dcroles,$then) = @_;
1095: my $numdc = 0;
1096: if ($env{'user.adv'}) {
1097: foreach my $envkey (sort keys %env) {
1098: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
1099: my $dcdom = $1;
1100: my $livedc = 1;
1101: my ($tstart,$tend)=split(/\./,$env{$envkey});
1102: if ($tstart && $tstart>$then) { $livedc = 0; }
1103: if ($tend && $tend <$then) { $livedc = 0; }
1104: if ($livedc) {
1105: $$dcroles{$dcdom} = $envkey;
1106: $numdc++;
1107: }
1108: }
1109: }
1110: }
1111: return $numdc;
1112: }
1113:
1114: sub adhoc_course_role {
1115: my ($then) = @_;
1116: my ($cdom,$cnum);
1117: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1118: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1119: if (&check_forcc($cdom,$cnum,$then)) {
1120: my $setprivs;
1121: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
1122: $setprivs = 1;
1123: } else {
1124: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
1125: if (($start && ($start>$then || $start == -1)) ||
1126: ($end && $end<$then)) {
1127: $setprivs = 1;
1128: }
1129: }
1130: if ($setprivs) {
1131: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
1132: my $role = $1;
1133: my $custom_role = $2;
1134: my $usec = $3;
1135: if ($role eq 'cr') {
1136: if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
1137: $role .= $custom_role;
1138: } else {
1139: return;
1140: }
1141: }
1142: my (%userroles,%newrole,%newgroups);
1143: my $area = '/'.$cdom.'/'.$cnum;
1144: my $spec = $role.'.'.$area;
1145: if ($usec ne '') {
1146: $spec .= '/'.$usec;
1147: $area .= '/'.$usec;
1148: }
1149: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1150: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,%newgroups);
1151: my $adhocstart = $then-1;
1152: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1153: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1154: }
1155: }
1156: }
1157: return;
1158: }
1159:
1160: sub check_forcc {
1161: my ($cdom,$cnum,$then) = @_;
1162: my $is_cc;
1163: if ($cdom ne '' && $cnum ne '') {
1164: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1165: my $envkey = 'user.role.cc./'.$cdom.'/'.$cnum;
1166: if (defined($env{$envkey})) {
1167: $is_cc = 1;
1168: my ($tstart,$tend)=split(/\./,$env{$envkey});
1169: if ($tstart && $tstart>$then) { $is_cc = 0; }
1170: if ($tend && $tend <$then) { $is_cc = 0; }
1171: }
1172: }
1173: }
1174: return $is_cc;
1175: }
1176:
1177: sub courselink {
1178: my ($dcdom,$rowtype) = @_;
1179: my $courseform=&Apache::loncommon::selectcourse_link
1180: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1181: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1182: $dcdom,$dcdom,undef);
1183: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1184: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1185: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1186: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1187: return $courseform.$hiddenitems;
1188: }
1189:
1190: sub coursepick_jscript {
1191: my %lt = &Apache::lonlocal::texthash(
1192: plsu => "Please use the 'Select Course' link to open a separate pick course window where you may select the course you wish to enter.",
1193: youc => 'You can only use this screen to select courses in the current domain.',
1194: );
1195: my $verify_script = <<"END";
1196: <script type="text/javascript">
1197: function verifyCoursePick(caller) {
1198: var numbutton = getIndex(caller)
1199: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1200: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1201: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1202: if (pickedCourse != '') {
1203: if (numbutton != -1) {
1204: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1205: document.rolechoice.elements[numbutton+1].name = courseTarget
1206: document.rolechoice.submit()
1207: }
1208: }
1209: else {
1210: alert("$lt{'plsu'}");
1211: }
1212: }
1213: else {
1214: alert("$lt{'youc'}")
1215: }
1216: }
1217: function getIndex(caller) {
1218: for (var i=0;i<document.rolechoice.elements.length;i++) {
1219: if (document.rolechoice.elements[i] == caller) {
1220: return i;
1221: }
1222: }
1223: return -1;
1224: }
1225: </script>
1226: END
1227: return $verify_script;
1228: }
1229:
1230: sub coauthorlink {
1231: my ($dcdom,$rowtype) = @_;
1232: my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
1233: my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
1234: return $coauthorform.$hiddenitems;
1235: }
1236:
1237: sub display_cc_role {
1238: my $rolekey = shift;
1239: my $roletext;
1240: my $advanced = $env{'user.adv'};
1241: my $tryagain = $env{'form.tryagain'};
1242: unless ($rolekey =~/^error\:/) {
1243: if ($rolekey =~ m-^user\.role.cc\./($match_domain)/($match_courseid)$-) {
1244: my $tcourseid = $1.'_'.$2;
1245: my $trolecode = 'cc./'.$1.'/'.$2;
1246: my $twhere;
1247: my $ttype;
1248: my $tbg='#77FF77';
1249: my $tfont='#003300';
1250: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1251: if (%newhash) {
1252: $twhere=$newhash{'description'}.
1253: ' <font size="-2">'.
1254: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1,$tfont).
1255: '</font>';
1256: $ttype = $newhash{'type'};
1257: } else {
1258: $twhere=&mt('Currently not available');
1259: $env{'course.'.$tcourseid.'.description'}=$twhere;
1260: }
1261: my $trole = &Apache::lonnet::plaintext('cc',$ttype);
1262: $twhere.="<br />".&mt('Domain').":".$1;
1263: $roletext = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$tfont,$trole,$twhere,'','','',1,'');
1264: }
1265: }
1266: return ($roletext);
1267: }
1268:
1269: sub adhoc_roles_row {
1270: my ($dcdom,$rowtype) = @_;
1271: my $output = '<tr bgcolor="#77FF77">'.
1272: ' <td colspan="5"><table><tr><td><span class="LC_rolesinfo">'
1273: .&mt('[_1]Ad hoc[_2] roles in domain [_3] --',
1274: '<span class="LC_cusr_emph">','</span>',$dcdom).'</span></td><td>';
1275: my $selectcclink = &courselink($dcdom,$rowtype);
1276: my $ccrole = &Apache::lonnet::plaintext('cc');
1277: my $carole = &Apache::lonnet::plaintext('ca');
1278: my $selectcalink = &coauthorlink($dcdom,$rowtype);
1279: $output.= '<span class="LC_rolesinfo">'.
1280: &mt('[_1]: [_2]',$ccrole,$selectcclink).
1281: '</span><br /></td><td> </td><td><span class="LC_rolesinfo">'.
1282: &mt('[_1]: [_2]',$carole,$selectcalink).
1283: '</span><br /></td></tr></table></td></tr>'.
1284: '<tr><td colspan="5" height="3"></td></tr>'."\n";
1285: return $output;
1286: }
1287:
1288: sub recent_filename {
1289: my $area=shift;
1290: return 'nohist_recent_'.&escape($area);
1291: }
1292:
1293: sub set_privileges {
1294: # role can be cc or ca
1295: my ($dcdom,$pickedcourse,$role) = @_;
1296: my $area = '/'.$dcdom.'/'.$pickedcourse;
1297: my $spec = $role.'.'.$area;
1298: my %userroles = &Apache::lonnet::set_arearole($role,$area,'','',
1299: $env{'user.domain'},
1300: $env{'user.name'});
1301: my %ccrole = ();
1302: &Apache::lonnet::standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
1303: my ($author,$adv)= &Apache::lonnet::set_userprivs(\%userroles,\%ccrole);
1304: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1305:
1306: &Apache::lonnet::log($env{'user.domain'},
1307: $env{'user.name'},
1308: $env{'user.home'},
1309: "Role ".$role);
1310: &Apache::lonnet::appenv(
1311: {'request.role' => $spec,
1312: 'request.role.domain' => $dcdom,
1313: 'request.course.sec' => ''});
1314: my $tadv=0;
1315: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1316: &Apache::lonnet::appenv({'request.role.adv' => $tadv});
1317: }
1318:
1319: sub courseloadpage {
1320: my ($courseid) = @_;
1321: my $startpage;
1322: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1323: [$courseid.':courseinit']);
1324: my ($tmp) = %entry_settings;
1325: unless ($tmp =~ /^error: 2 /) {
1326: $startpage = $entry_settings{$courseid.':courseinit'};
1327: }
1328: if ($startpage eq '') {
1329: if (exists($env{'environment.course_init_display'})) {
1330: $startpage = $env{'environment.course_init_display'};
1331: }
1332: }
1333: return $startpage;
1334: }
1335:
1336: 1;
1337: __END__
1338:
1339: =head1 NAME
1340:
1341: Apache::lonroles - User Roles Screen
1342:
1343: =head1 SYNOPSIS
1344:
1345: Invoked by /etc/httpd/conf/srm.conf:
1346:
1347: <Location /adm/roles>
1348: PerlAccessHandler Apache::lonacc
1349: SetHandler perl-script
1350: PerlHandler Apache::lonroles
1351: ErrorDocument 403 /adm/login
1352: ErrorDocument 500 /adm/errorhandler
1353: </Location>
1354:
1355: =head1 OVERVIEW
1356:
1357: =head2 Choosing Roles
1358:
1359: C<lonroles> is a handler that allows a user to switch roles in
1360: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1361: default role that a user has before selecting a role, as widely as
1362: possible, but certain handlers for example need specification which
1363: course they should act on, etc. Both in this scenario, and when the
1364: handler determines via C<lonnet>'s C<&allowed> function that a certain
1365: action is not allowed, C<lonroles> is used as error handler. This
1366: allows the user to select another role which may have permission to do
1367: what they were trying to do. C<lonroles> can also be accessed via the
1368: B<CRS> button in the Remote Control.
1369:
1370: =begin latex
1371:
1372: \begin{figure}
1373: \begin{center}
1374: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1375: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1376: \end{center}
1377: \end{figure}
1378:
1379: =end latex
1380:
1381: =head2 Role Initialization
1382:
1383: 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.
1384:
1385: =head1 INTRODUCTION
1386:
1387: This module enables a user to select what role he wishes to
1388: operate under (instructor, student, teaching assistant, course
1389: coordinator, etc). These roles are pre-established by the actions
1390: of upper-level users.
1391:
1392: This is part of the LearningOnline Network with CAPA project
1393: described at http://www.lon-capa.org.
1394:
1395: =head1 HANDLER SUBROUTINE
1396:
1397: This routine is called by Apache and mod_perl.
1398:
1399: =over 4
1400:
1401: =item *
1402:
1403: Roles Initialization (yes/no)
1404:
1405: =item *
1406:
1407: Get Error Message from Environment
1408:
1409: =item *
1410:
1411: Who is this?
1412:
1413: =item *
1414:
1415: Generate Page Output
1416:
1417: =item *
1418:
1419: Choice or no choice
1420:
1421: =item *
1422:
1423: Table
1424:
1425: =item *
1426:
1427: Privileges
1428:
1429: =back
1430:
1431: =cut
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