File:
[LON-CAPA] /
loncom /
auth /
lonroles.pm
Revision
1.202:
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Fri Jul 18 16:17:39 2008 UTC (16 years, 1 month ago) by
raeburn
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MAIN
CVS tags:
version_2_6_99_1,
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- If user has only one active role do not show "Select a Course to Enter" header line.
- If user has only one active role do not show "No role specified" line, since automatic role selection for users with a single role means role type "cm" is inaccessible.
- If user has a single active role, and that role is au, ca or aa, only do automatic role selection if user's session is on home server for corresponding author; display a switch server link if not (we don't automatically switch in case the home server is overloaded and we could get into an infinite loop of switching/offloading).
1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.202 2008/07/18 16:17:39 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: delete($env{$envkey});
153: $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
154: last;
155: }
156: if ($dcroles{$domain}) {
157: my ($server_status,$home) = &check_author_homeserver($user,$domain);
158: if (($server_status eq 'ok') || ($server_status eq 'switchserver')) {
159: &check_privs($domain,$user,$then,$now,'ca');
160: if ($server_status eq 'switchserver') {
161: my $trolecode = 'ca./'.$domain.'/'.$user;
162: my $switchserver = '/adm/switchserver?'
163: .'otherserver='.$home.'&role='.$trolecode;
164: $r->internal_redirect($switchserver);
165: }
166: } else {
167: delete($env{$envkey});
168: }
169: } else {
170: delete($env{$envkey});
171: }
172: last;
173: }
174: }
175: }
176:
177: foreach $envkey (keys %env) {
178: next if ($envkey!~/^user\.role\./);
179: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
180: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
181: if ($env{'form.'.$trolecode}) {
182: if ($tstatus eq 'is') {
183: $where=~s/^\///;
184: my ($cdom,$cnum,$csec)=split(/\//,$where);
185: # check for course groups
186: my %coursegroups = &Apache::lonnet::get_active_groups(
187: $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
188: my $cgrps = join(':',keys(%coursegroups));
189:
190: # store role if recent_role list being kept
191: if ($env{'environment.recentroles'}) {
192: my %frozen_roles =
193: &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
194: &Apache::lonhtmlcommon::store_recent('roles',
195: $trolecode,' ',$frozen_roles{$trolecode});
196: }
197:
198:
199: # check for keyed access
200: if (($role eq 'st') &&
201: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
202: # who is key authority?
203: my $authdom=$cdom;
204: my $authnum=$cnum;
205: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
206: ($authnum,$authdom)=
207: split(/:/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
208: }
209: # check with key authority
210: unless (&Apache::lonnet::validate_access_key(
211: $env{'environment.key.'.$cdom.'_'.$cnum},
212: $authdom,$authnum)) {
213: # there is no valid key
214: if ($env{'form.newkey'}) {
215: # student attempts to register a new key
216: &Apache::loncommon::content_type($r,'text/html');
217: &Apache::loncommon::no_cache($r);
218: $r->send_http_header;
219: my $swinfo=&Apache::lonmenu::rawconfig();
220: my $start_page=&Apache::loncommon::start_page
221: ('Verifying Access Key to Unlock this Course');
222: my $end_page=&Apache::loncommon::end_page();
223: my $buttontext=&mt('Enter Course');
224: my $message=&mt('Successfully registered key');
225: my $assignresult=
226: &Apache::lonnet::assign_access_key(
227: $env{'form.newkey'},
228: $authdom,$authnum,
229: $cdom,$cnum,
230: $env{'user.domain'},
231: $env{'user.name'},
232: 'Assigned from '.$ENV{'REMOTE_ADDR'}.' at '.localtime().' for '.
233: $trolecode);
234: unless ($assignresult eq 'ok') {
235: $assignresult=~s/^error\:\s*//;
236: $message=&mt($assignresult).
237: '<br /><a href="/adm/logout">'.
238: &mt('Logout').'</a>';
239: $buttontext=&mt('Re-Enter Key');
240: }
241: $r->print(<<ENDENTEREDKEY);
242: $start_page
243: <script type="text/javascript">
244: $swinfo
245: </script>
246: <form method="post">
247: <input type="hidden" name="selectrole" value="1" />
248: <input type="hidden" name="$trolecode" value="1" />
249: <font size="+2">$message</font><br />
250: <input type="submit" value="$buttontext" />
251: </form>
252: $end_page
253: ENDENTEREDKEY
254: return OK;
255: } else {
256: # print form to enter a new key
257: &Apache::loncommon::content_type($r,'text/html');
258: &Apache::loncommon::no_cache($r);
259: $r->send_http_header;
260: my $swinfo=&Apache::lonmenu::rawconfig();
261: my $start_page=&Apache::loncommon::start_page
262: ('Enter Access Key to Unlock this Course');
263: my $end_page=&Apache::loncommon::end_page();
264: $r->print(<<ENDENTERKEY);
265: $start_page
266: <script type="text/javascript">
267: $swinfo
268: </script>
269: <form method="post">
270: <input type="hidden" name="selectrole" value="1" />
271: <input type="hidden" name="$trolecode" value="1" />
272: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
273: <input type="submit" value="Enter key" />
274: </form>
275: $end_page
276: ENDENTERKEY
277: return OK;
278: }
279: }
280: }
281: &Apache::lonnet::log($env{'user.domain'},
282: $env{'user.name'},
283: $env{'user.home'},
284: "Role ".$trolecode);
285:
286: &Apache::lonnet::appenv(
287: {'request.role' => $trolecode,
288: 'request.role.domain' => $cdom,
289: 'request.course.sec' => $csec,
290: 'request.course.groups' => $cgrps});
291: my $tadv=0;
292:
293: if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
294: my $msg;
295: my ($furl,$ferr)=
296: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
297: if (($env{'form.orgurl'}) &&
298: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
299: my $dest=$env{'form.orgurl'};
300: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
301: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
302: if (($ferr) && ($tadv)) {
303: &error_page($r,$ferr,$dest);
304: } else {
305: $r->internal_redirect($dest);
306: }
307: return OK;
308: } else {
309: if (!$env{'request.course.id'}) {
310: &Apache::lonnet::appenv(
311: {"request.course.id" => $cdom.'_'.$cnum});
312: $furl='/adm/roles?tryagain=1';
313: $msg=
314: '<h1><span class="LC_error">'.
315: &mt('Could not initialize [_1] at this time.',
316: $env{'course.'.$cdom.'_'.$cnum.'.description'}).
317: '</span></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
318: }
319: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
320: &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
321:
322: if (($ferr) && ($tadv)) {
323: &error_page($r,$ferr,$furl);
324: } else {
325: # Check to see if the user is a CC entering a course
326: # for the first time
327: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
328: if (substr($courseid, 0, 1) eq '/') {
329: $courseid = substr($courseid, 1);
330: }
331: $courseid =~ s/\//_/;
332: if ($role eq 'cc' && $env{'course.' . $courseid .
333: '.course.helper.not.run'}) {
334: $furl = "/adm/helper/course.initialization.helper";
335: # Send the user to the course they selected
336: } elsif ($env{'request.course.id'}) {
337: if ($env{'form.destinationurl'}) {
338: my $dest = $env{'form.destinationurl'};
339: &redirect_user($r,&mt('Entering [_1]',
340: $env{'course.'.$courseid.'.description'}),
341: $dest,$msg,
342: $env{'environment.remotenavmap'});
343: return OK;
344: }
345: if (&Apache::lonnet::allowed('whn',
346: $env{'request.course.id'})
347: || &Apache::lonnet::allowed('whn',
348: $env{'request.course.id'}.'/'
349: .$env{'request.course.sec'})
350: ) {
351: my $startpage = &courseloadpage($courseid);
352: unless ($startpage eq 'firstres') {
353: $msg = &mt('Entering [_1] ....',
354: $env{'course.'.$courseid.'.description'});
355: &redirect_user($r,&mt('New in course'),
356: '/adm/whatsnew?refpage=start',$msg,
357: $env{'environment.remotenavmap'});
358: return OK;
359: }
360: }
361: }
362: # Are we allowed to look at the first resource?
363: if ($furl !~ m|^/adm/|) {
364: # Guess not ...
365: $furl=&Apache::lonpageflip::first_accessible_resource();
366: }
367: $msg = &mt('Entering [_1] ...',
368: $env{'course.'.$courseid.'.description'});
369: &redirect_user($r,&mt('Entering [_1]',
370: $env{'course.'.$courseid.'.description'}),
371: $furl,$msg,
372: $env{'environment.remotenavmap'});
373: }
374: return OK;
375: }
376: }
377: #
378: # Send the user to the construction space they selected
379: if ($role =~ /^(au|ca|aa)$/) {
380: my $redirect_url = '/priv/';
381: if ($role eq 'au') {
382: $redirect_url.=$env{'user.name'};
383: } else {
384: $where =~ /\/(.*)$/;
385: $redirect_url .= $1;
386: }
387: $redirect_url .= '/';
388: &redirect_user($r,&mt('Entering Construction Space'),
389: $redirect_url);
390: return OK;
391: }
392: if ($role eq 'dc') {
393: my $redirect_url = '/adm/menu/';
394: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
395: $redirect_url);
396: return OK;
397: }
398: }
399: }
400: }
401: }
402:
403:
404: # =============================================================== No Roles Init
405:
406: &Apache::loncommon::content_type($r,'text/html');
407: &Apache::loncommon::no_cache($r);
408: $r->send_http_header;
409: return OK if $r->header_only;
410:
411: my $swinfo=&Apache::lonmenu::rawconfig();
412: my $start_page=&Apache::loncommon::start_page('User Roles');
413: my $standby=&mt('Role selected. Please stand by.');
414: $standby=~s/\n/\\n/g;
415: 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 />';
416:
417: $r->print(<<ENDHEADER);
418: $start_page
419: <br />
420: <noscript>
421: $noscript
422: </noscript>
423: <script type="text/javascript">
424: $swinfo
425: window.focus();
426:
427: active=true;
428:
429: function enterrole (thisform,rolecode,buttonname) {
430: if (active) {
431: active=false;
432: document.title='$standby';
433: window.status='$standby';
434: thisform.newrole.value=rolecode;
435: thisform.submit();
436: } else {
437: alert('$standby');
438: }
439: }
440: </script>
441: ENDHEADER
442:
443: # ------------------------------------------ Get Error Message from Environment
444:
445: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
446: if ($env{'user.error.msg'}) {
447: $r->log_reason(
448: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
449: }
450:
451: # ------------------------------------------------- Can this user re-init, etc?
452:
453: my $advanced=$env{'user.adv'};
454: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
455: my $tryagain=$env{'form.tryagain'};
456:
457: # -------------------------------------------------------- Generate Page Output
458: # --------------------------------------------------------------- Error Header?
459: if ($error) {
460: $r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
461: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
462: if ($priv ne '') {
463: $r->print(&mt('Access : ').&Apache::lonnet::plaintext($priv)."\n");
464: }
465: if ($fn ne '') {
466: $r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
467: }
468: if ($msg ne '') {
469: $r->print(&mt('Action : ').$msg."\n");
470: }
471: $r->print("</pre><hr />");
472: my $url=$fn;
473: my $last;
474: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
475: &GDBM_READER(),0640)) {
476: $last=$hash{'last_known'};
477: untie(%hash);
478: }
479: if ($last) { $fn.='?symb='.&escape($last); }
480:
481: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
482: &Apache::lonenc::check_encrypt($fn));
483: } else {
484: if ($env{'user.error.msg'}) {
485: $r->print(
486: '<h3><span class="LC_error">'.
487: &mt('You need to choose another user role or enter a specific course for this function').'</span></h3>');
488: }
489: }
490: # -------------------------------------------------------- Choice or no choice?
491: if ($nochoose) {
492: $r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
493: &mt('This action is currently not authorized.').'</span>'.
494: &Apache::loncommon::end_page());
495: return OK;
496: } else {
497: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
498: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
499: }
500: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
501: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
502: $r->print('<input type="hidden" name="selectrole" value="1" />');
503: $r->print('<input type="hidden" name="newrole" value="" />');
504: }
505: my (%roletext,%sortrole,%roleclass);
506: my $countactive=0;
507: my $countfuture=0;
508: my $countwill=0;
509: my $inrole=0;
510: my $possiblerole='';
511: my %futureroles;
512: my %roles_nextlogin;
513: foreach $envkey (sort keys %env) {
514: my $button = 1;
515: my $switchserver='';
516: my $roletext;
517: my $sortkey;
518: if ($envkey=~/^user\.role\./) {
519: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
520: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
521: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
522: $tremark='';
523: $tpstart=' ';
524: $tpend=' ';
525: $tfont='#000000';
526: if ($tstart) {
527: $tpstart=&Apache::lonlocal::locallocaltime($tstart);
528: }
529: if ($tend) {
530: $tpend=&Apache::lonlocal::locallocaltime($tend);
531: }
532: if ($env{'request.role'} eq $trolecode) {
533: $tstatus='selected';
534: }
535: my $tbg;
536: if (($tstatus eq 'is')
537: || ($tstatus eq 'selected')
538: || ($tstatus eq 'will')
539: || ($tstatus eq 'future')
540: || ($env{'form.showall'})) {
541: if ($tstatus eq 'is') {
542: $tbg='#77FF77';
543: $tfont='#003300';
544: $possiblerole=$trolecode;
545: $countactive++;
546: } elsif ($tstatus eq 'future') {
547: $tbg='#FFFF77';
548: $button=0;
549: $futureroles{$trolecode} = $tstart.':'.$tend;
550: $countfuture ++;
551: } elsif ($tstatus eq 'will') {
552: $tbg='#FFAA77';
553: $tremark.=&mt('Active at next login. ');
554: $roles_nextlogin{$trolecode} = $tstart.':'.$tend;
555: $countwill ++;
556: } elsif ($tstatus eq 'expired') {
557: $tbg='#FF7777';
558: $tfont='#330000';
559: $button=0;
560: } elsif ($tstatus eq 'will_not') {
561: $tbg='#AAFF77';
562: $tremark.=&mt('Expired after logout. ');
563: } elsif ($tstatus eq 'selected') {
564: $tbg='#11CC55';
565: $tfont='#002200';
566: $inrole=1;
567: $countactive++;
568: $tremark.=&mt('Currently selected. ');
569: }
570: my $trole;
571: if ($role =~ /^cr\//) {
572: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
573: if ($tremark) { $tremark.='<br />'; }
574: $tremark.=&mt('Defined by ').$rauthor.
575: &mt(' at ').$rdomain.'.';
576: }
577: $trole=Apache::lonnet::plaintext($role);
578: my $ttype;
579: my $twhere;
580: my ($tdom,$trest,$tsection)=
581: split(/\//,Apache::lonnet::declutter($where));
582: # First, Co-Authorship roles
583: if (($role eq 'ca') || ($role eq 'aa')) {
584: my $home = &Apache::lonnet::homeserver($trest,$tdom);
585: my $allowed=0;
586: my @ids=&Apache::lonnet::current_machine_ids();
587: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
588: if (!$allowed) {
589: $button=0;
590: $switchserver='otherserver='.$home.'&role='.$trolecode;
591: }
592: #next if ($home eq 'no_host');
593: $home = &Apache::lonnet::hostname($home);
594: $ttype='Construction Space';
595: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
596: ': '.$tdom.'<br />'.
597: ' '.&mt('Server').': '.$home;
598: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
599: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
600: $sortkey=$role."$trest:$tdom";
601: } elsif ($role eq 'au') {
602: # Authors
603: my $home = &Apache::lonnet::homeserver
604: ($env{'user.name'},$env{'user.domain'});
605: my $allowed=0;
606: my @ids=&Apache::lonnet::current_machine_ids();
607: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
608: if (!$allowed) {
609: $button=0;
610: $switchserver='otherserver='.$home.'&role='.$trolecode;
611: }
612: #next if ($home eq 'no_host');
613: $home = &Apache::lonnet::hostname($home);
614: $ttype='Construction Space';
615: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
616: ': '.$home;
617: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
618: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
619: $sortkey=$role;
620: } elsif ($trest) {
621: my $tcourseid=$tdom.'_'.$trest;
622: $ttype = &Apache::loncommon::course_type($tcourseid);
623: $trole = &Apache::lonnet::plaintext($role,$ttype);
624: if ($env{'course.'.$tcourseid.'.description'}) {
625: $twhere=$env{'course.'.$tcourseid.'.description'};
626: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
627: unless ($twhere eq &mt('Currently not available')) {
628: $twhere.=' <font size="-2">'.
629: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
630: '</font>';
631: }
632: } else {
633: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
634: if (%newhash) {
635: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
636: "\0".$envkey;
637: $twhere=$newhash{'description'}.
638: ' <font size="-2">'.
639: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
640: '</font>';
641: $ttype = $newhash{'type'};
642: $trole = &Apache::lonnet::plaintext($role,$ttype);
643: } else {
644: $twhere=&mt('Currently not available');
645: $env{'course.'.$tcourseid.'.description'}=$twhere;
646: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
647: $ttype = 'Unavailable';
648: }
649: }
650: if ($tsection) {
651: $twhere.='<br />'.&mt('Section').': '.$tsection;
652: }
653: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
654: } elsif ($tdom) {
655: $ttype='Domain';
656: $twhere=$tdom;
657: $sortkey=$role.$twhere;
658: } else {
659: $ttype='System';
660: $twhere=&mt('system wide');
661: $sortkey=$role.$twhere;
662: }
663: $roletext.=&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver);
664: $roletext{$envkey}=$roletext;
665: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
666: $sortrole{$sortkey}=$envkey;
667: $roleclass{$envkey}=$ttype;
668: }
669: }
670: }
671: if ($env{'user.adv'}) {
672: $r->print(
673: '<br /><span class="LC_rolesinfo"><label>'.&mt('Show all roles').': <input type="checkbox" name="showall"');
674: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
675: $r->print(' /></label><input type="submit" value="'.&mt('Display').'" /></span>');
676: } else {
677: if ($countactive > 0) {
678: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
679: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
680: $r->print('<p>'.&mt('[_1]Visit the [_2]Course Catalog[_3] to view all [_4] LON-CAPA courses.','<b>','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a></b>',$domdesc).'<br />'.&mt('If a course is [_1]not[_2] in your list of current courses below, you may be able to enroll if self-enrollment is permitted.','<b>','</b>').'</p>');
681: }
682: }
683:
684: # No active roles
685: if ($countactive==0) {
686: if ($inrole) {
687: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
688: } else {
689: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
690: }
691: &findcourse_advice($r);
692: $r->print('</form>');
693: if ($countfuture) {
694: $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
695: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
696: $nochoose);
697: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
698: \%roletext);
699: my $tremark='';
700: my $tfont='#003300';
701: if ($env{'request.role'} eq 'cm') {
702: $r->print('<tr bgcolor="#11CC55">');
703: $tremark=&mt('Currently selected. ');
704: $tfont='#002200';
705: } else {
706: $r->print('<tr bgcolor="#77FF77">');
707: }
708: $r->print('<td></td><td colspan="3"><font color="'.$tfont.'"><span class="LC_rolesinfo">'.&mt('No role specified').
709: '</span></font></td><td><font color="'.$tfont.'">'.$tremark.
710: ' </font></td></tr>'."\n");
711:
712: $r->print('</table>');
713: }
714: $r->print(&Apache::loncommon::end_page());
715: return OK;
716: # Is there only one choice?
717: } elsif ($countactive==1) {
718: my $needs_switchserver;
719: if ($env{'user.author'}) {
720: $needs_switchserver = &check_needs_switchserver($possiblerole);
721: }
722: if ((!$needs_switchserver) && ($env{'request.role'} eq 'cm')) {
723: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
724: '<input type="hidden" name="'.$possiblerole.'" value="1" />'.
725: '<noscript><br /><input type="submit" name="submit" value="'.&mt('Continue').'" /></noscript>');
726: $r->print("</form>\n");
727: $r->rflush();
728: $r->print('<script type="text/javascript">document.forms.rolechoice.submit();</script>');
729: $r->print(&Apache::loncommon::end_page());
730: return OK;
731: }
732: if ($needs_switchserver) {
733: $r->print("<h2>".&mt('Server Switch Required')."</h2>\n".
734: &mt('Construction Space access is only available from '.
735: 'the home server of the corresponding Author.').'<br />'.
736: &mt("Click the 'Switch Server' link to go there.").'<br />');
737: }
738: }
739: # More than one possible role
740: # ----------------------------------------------------------------------- Table
741: unless ((!&Apache::lonmenu::show_course()) || ($nochoose) || ($countactive==1)) {
742: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
743: }
744: my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
745: if ($env{'environment.recentroles'}) {
746: my %recent_roles =
747: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
748: my $output='';
749: foreach (sort(keys(%recent_roles))) {
750: if (defined($roletext{'user.role.'.$_})) {
751: $output.=$roletext{'user.role.'.$_};
752: if ($_ =~ m-dc\./($match_domain)/-
753: && $dcroles{$1}) {
754: $output .= &adhoc_roles_row($1,'recent');
755: }
756: } elsif ($numdc > 0) {
757: unless ($_ =~/^error\:/) {
758: $output.=&display_cc_role('user.role.'.$_);
759: }
760: }
761: }
762: if ($output) {
763: $r->print("<tr><td align='center' colspan='5'><font face='arial'>".
764: &mt('Recent Roles')."</font></td></tr>");
765: $r->print($output);
766: $doheaders ++;
767: }
768: }
769:
770: if ($numdc > 0) {
771: $r->print(&coursepick_jscript());
772: $r->print(&Apache::loncommon::coursebrowser_javascript().
773: &Apache::loncommon::authorbrowser_javascript());
774: }
775: &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
776: if ($countactive > 1) {
777: my $tremark='';
778: my $tfont='#003300';
779: if ($env{'request.role'} eq 'cm') {
780: $r->print('<tr bgcolor="#11CC55">');
781: $tremark=&mt('Currently selected. ');
782: $tfont='#002200';
783: } else {
784: $r->print('<tr bgcolor="#77FF77">');
785: }
786: unless ($nochoose) {
787: if ($env{'request.role'} ne 'cm') {
788: $r->print('<td><input type="submit" value="'.
789: &mt('Select').'" name="cm" /></td>');
790: } else {
791: $r->print('<td> </td>');
792: }
793: }
794: $r->print('<td colspan="3"><font color="'.$tfont.'"><span class="LC_rolesinfo">'.&mt('No role specified').
795: '</span></font></td><td><font color="'.$tfont.'">'.$tremark.
796: ' </font></td></tr>'."\n");
797: }
798: $r->print('</table>');
799: unless ($nochoose) {
800: $r->print("</form>\n");
801: }
802: # ------------------------------------------------------------ Privileges Info
803: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
804: $r->print('<hr /><h2>Current Privileges</h2>');
805: $r->print(&privileges_info());
806: }
807: $r->print(&Apache::lonnet::getannounce());
808: if ($advanced) {
809: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
810: $r->print('<p><small><i>'
811: .&mt('This is LON-CAPA [_1]',$r->dir_config('lonVersion'))
812: .'</i><br />'
813: .'<a href="/adm/logout">'.&mt('Logout').'</a> '
814: .'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
815: .&mt('Course Catalog')
816: .'</small></p>');
817: }
818: $r->print(&Apache::loncommon::end_page());
819: return OK;
820: }
821:
822: sub roletable_headers {
823: my ($r,$roleclass,$sortrole,$nochoose) = @_;
824: my $doheaders;
825: if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
826: $r->print('<br /><table id="LC_rolesmenu"><tr>');
827: if (!$nochoose) { $r->print('<th> </th>'); }
828: $r->print('<th>'.&mt('User Role').'</th><th>'.&mt('Extent')
829: .'</th><th>'.&mt('Start').'</th><th>'.&mt('End')
830: .'</th></tr>'."\n");
831: $doheaders=-1;
832: my @roletypes = &roletypes();
833: foreach my $type (@roletypes) {
834: my $haverole=0;
835: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
836: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
837: $haverole=1;
838: }
839: }
840: if ($haverole) { $doheaders++; }
841: }
842: }
843: return $doheaders;
844: }
845:
846: sub roletypes {
847: my @types = ('Domain','Construction Space','Course','Unavailable','System');
848: return @types;
849: }
850:
851: sub print_rolerows {
852: my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
853: if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
854: my @types = &roletypes();
855: foreach my $type (@types) {
856: my $output;
857: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
858: if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
859: if (ref($roletext) eq 'HASH') {
860: $output.=$roletext->{$sortrole->{$which}};
861: if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
862: if (ref($dcroles) eq 'HASH') {
863: if ($dcroles->{$1}) {
864: $output .= &adhoc_roles_row($1,'');
865: }
866: }
867: }
868: }
869: }
870: }
871: if ($output) {
872: if ($doheaders > 0) {
873: $r->print("<tr>".
874: "<td align='center' colspan='5'><font face='arial'>".
875: &mt($type)."</font></td></tr>");
876: }
877: $r->print($output);
878: }
879: }
880: }
881: }
882:
883: sub findcourse_advice {
884: my ($r) = @_;
885: my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
886: my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
887: if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
888: $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
889: <ul>
890: <li>'.&mt('The course has yet to be created.').'</li>
891: <li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
892: <li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
893: <li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
894: <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>
895: </ul>');
896: } else {
897: $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 />');
898: }
899: $r->print('<p>'.&mt('The [_1]Course Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created.','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a>',$domdesc).'<br />');
900: $r->print(&mt('You can search the course catalog for courses which permit self-enrollment, if you would like to enroll in a course.').'</p>');
901: return;
902: }
903:
904: sub privileges_info {
905: my ($which) = @_;
906: my $output;
907:
908: $which ||= $env{'request.role'};
909:
910: foreach my $envkey (sort(keys(%env))) {
911: next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
912:
913: my $where=$1;
914: my $ttype;
915: my $twhere;
916: my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
917: if ($trest) {
918: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
919: $ttype='Construction Space';
920: $twhere='User: '.$trest.', Domain: '.$tdom;
921: } else {
922: $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
923: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
924: if ($tsec) {
925: my $sec_type = 'Section';
926: if (exists($env{"user.role.gr.$where"})) {
927: $sec_type = 'Group';
928: }
929: $twhere.=' ('.$sec_type.': '.$tsec.')';
930: }
931: }
932: } elsif ($tdom) {
933: $ttype='Domain';
934: $twhere=$tdom;
935: } else {
936: $ttype='System';
937: $twhere='/';
938: }
939: $output .= "\n<h3>".$ttype.': '.$twhere.'</h3>'."\n<ul>";
940: foreach my $priv (sort(split(/:/,$env{$envkey}))) {
941: next if (!$priv);
942:
943: my ($prv,$restr)=split(/\&/,$priv);
944: my $trestr='';
945: if ($restr ne 'F') {
946: $trestr.=' ('.
947: join(', ',
948: map { &Apache::lonnet::plaintext($_) }
949: (split('',$restr))).') ';
950: }
951: $output .= "\n\t".
952: '<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
953: }
954: $output .= "\n".'</ul>';
955: }
956: return $output;
957: }
958:
959: sub role_status {
960: my ($rolekey,$then,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
961: my @pwhere = ();
962: if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
963: (undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
964: unless (!defined($$role) || $$role eq '') {
965: $$where=join('.',@pwhere);
966: $$trolecode=$$role.'.'.$$where;
967: ($$tstart,$$tend)=split(/\./,$env{$rolekey});
968: $$tstatus='is';
969: if ($$tstart && $$tstart>$then) {
970: $$tstatus='future';
971: if ($$tstart<$now) { $$tstatus='will'; }
972: }
973: if ($$tend) {
974: if ($$tend<$then) {
975: $$tstatus='expired';
976: } elsif ($$tend<$now) {
977: $$tstatus='will_not';
978: }
979: }
980: }
981: }
982: }
983:
984: sub build_roletext {
985: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver) = @_;
986: my $roletext='<tr bgcolor="'.$tbg.'" class="LC_rolesmenu_'.$tstatus.'">';
987: my $is_dc=($trolecode =~ m/^dc\./);
988: my $rowspan=($is_dc) ? ''
989: : ' rowspan="2" ';
990:
991: unless ($nochoose) {
992: my $buttonname=$trolecode;
993: $buttonname=~s/\W//g;
994: if (!$button) {
995: if ($switchserver) {
996: $roletext.='<td'.$rowspan.'><span class="LC_rolesinfo"><a href="/adm/switchserver?'.
997: $switchserver.'">'.&mt('Switch Server').'</a></span></td>';
998: } else {
999: $roletext.=('<td'.$rowspan.'> </td>');
1000: }
1001: } elsif ($tstatus eq 'is') {
1002: $roletext.='<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
1003: &mt('Select').'" onClick="javascript:enterrole(this.form,\''.
1004: $trolecode."','".$buttonname.'\');" /></td>';
1005: } elsif ($tryagain) {
1006: $roletext.=
1007: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
1008: &mt('Try Selecting Again').'" onClick="javascript:enterrole(this.form,\''.
1009: $trolecode."','".$buttonname.'\');" /></td>';
1010: } elsif ($advanced) {
1011: $roletext.=
1012: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
1013: &mt('Re-Initialize').'" onClick="javascript:enterrole(this.form,\''.
1014: $trolecode."','".$buttonname.'\');" /></td>';
1015: } else {
1016: $roletext.='<td'.$rowspan.'> </td>';
1017: }
1018: }
1019: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
1020: $tremark.=&Apache::lonannounce::showday(time,1,
1021: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
1022: }
1023: $roletext.='<td><font color="'.$tfont.'">'.$trole.
1024: '</font></td><td><font color="'.$tfont.'">'.$twhere.
1025: '</font></td><td><font color="'.$tfont.'">'.$tpstart.
1026: '</font></td><td><font color="'.$tfont.'">'.$tpend.
1027: '</font></td></tr>';
1028: if (!$is_dc) {
1029: $roletext.='<tr bgcolor="'.$tbg.'"><td colspan="4"><font color="'.$tfont.'"><span class="LC_rolesinfo">'.$tremark.
1030: '</span> </font></td></tr><tr><td colspan="5" height="3"></td></tr>'."\n";
1031: }
1032: return $roletext;
1033: }
1034:
1035: sub check_needs_switchserver {
1036: my ($possiblerole) = @_;
1037: my $needs_switchserver;
1038: my ($role,$where) = split(/\./,$possiblerole,2);
1039: my (undef,$tdom,$twho) = split(/\//,$where);
1040: my ($server_status,$home);
1041: if (($role eq 'ca') || ($role eq 'aa')) {
1042: ($server_status,$home) = &check_author_homeserver($twho,$tdom);
1043: } else {
1044: ($server_status,$home) = &check_author_homeserver($env{'user.name'},
1045: $env{'user.domain'});
1046: }
1047: if ($server_status eq 'switchserver') {
1048: $needs_switchserver = 1;
1049: }
1050: return $needs_switchserver;
1051: }
1052:
1053: sub check_author_homeserver {
1054: my ($uname,$udom)=@_;
1055: if (($uname eq '') || ($udom eq '')) {
1056: return ('fail','');
1057: }
1058: my $home = &Apache::lonnet::homeserver($uname,$udom);
1059: if (&Apache::lonnet::host_domain($home) ne $udom) {
1060: return ('fail',$home);
1061: }
1062: my @ids=&Apache::lonnet::current_machine_ids();
1063: if (grep(/^\Q$home\E$/,@ids)) {
1064: return ('ok',$home);
1065: } else {
1066: return ('switchserver',$home);
1067: }
1068: }
1069:
1070: sub check_privs {
1071: my ($cdom,$cnum,$then,$now,$checkrole) = @_;
1072: my $cckey = 'user.role.'.$checkrole.'./'.$cdom.'/'.$cnum;
1073: if ($env{$cckey}) {
1074: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
1075: &role_status($cckey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
1076: unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
1077: &set_privileges($cdom,$cnum,$checkrole);
1078: }
1079: } else {
1080: &set_privileges($cdom,$cnum,$checkrole);
1081: }
1082: }
1083:
1084: sub check_fordc {
1085: my ($dcroles,$then) = @_;
1086: my $numdc = 0;
1087: if ($env{'user.adv'}) {
1088: foreach my $envkey (sort keys %env) {
1089: if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
1090: my $dcdom = $1;
1091: my $livedc = 1;
1092: my ($tstart,$tend)=split(/\./,$env{$envkey});
1093: if ($tstart && $tstart>$then) { $livedc = 0; }
1094: if ($tend && $tend <$then) { $livedc = 0; }
1095: if ($livedc) {
1096: $$dcroles{$dcdom} = $envkey;
1097: $numdc++;
1098: }
1099: }
1100: }
1101: }
1102: return $numdc;
1103: }
1104:
1105: sub adhoc_course_role {
1106: my ($then) = @_;
1107: my ($cdom,$cnum);
1108: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
1109: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1110: if (&check_forcc($cdom,$cnum,$then)) {
1111: my $setprivs;
1112: if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
1113: $setprivs = 1;
1114: } else {
1115: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
1116: if (($start && ($start>$then || $start == -1)) ||
1117: ($end && $end<$then)) {
1118: $setprivs = 1;
1119: }
1120: }
1121: if ($setprivs) {
1122: if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
1123: my $role = $1;
1124: my $custom_role = $2;
1125: my $usec = $3;
1126: if ($role eq 'cr') {
1127: if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
1128: $role .= $custom_role;
1129: } else {
1130: return;
1131: }
1132: }
1133: my (%userroles,%newrole,%newgroups);
1134: my $area = '/'.$cdom.'/'.$cnum;
1135: my $spec = $role.'.'.$area;
1136: if ($usec ne '') {
1137: $spec .= '/'.$usec;
1138: $area .= '/'.$usec;
1139: }
1140: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1141: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,%newgroups);
1142: my $adhocstart = $then-1;
1143: $userroles{'user.role.'.$spec} = $adhocstart.'.';
1144: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1145: }
1146: }
1147: }
1148: return;
1149: }
1150:
1151: sub check_forcc {
1152: my ($cdom,$cnum,$then) = @_;
1153: my $is_cc;
1154: if ($cdom ne '' && $cnum ne '') {
1155: if (&Apache::lonnet::is_course($cdom,$cnum)) {
1156: my $envkey = 'user.role.cc./'.$cdom.'/'.$cnum;
1157: if (defined($env{$envkey})) {
1158: $is_cc = 1;
1159: my ($tstart,$tend)=split(/\./,$env{$envkey});
1160: if ($tstart && $tstart>$then) { $is_cc = 0; }
1161: if ($tend && $tend <$then) { $is_cc = 0; }
1162: }
1163: }
1164: }
1165: return $is_cc;
1166: }
1167:
1168: sub courselink {
1169: my ($dcdom,$rowtype) = @_;
1170: my $courseform=&Apache::loncommon::selectcourse_link
1171: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
1172: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1173: $dcdom,$dcdom,undef);
1174: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1175: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
1176: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
1177: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1178: return $courseform.$hiddenitems;
1179: }
1180:
1181: sub coursepick_jscript {
1182: my %lt = &Apache::lonlocal::texthash(
1183: plsu => "Please use the 'Select Course' link to open a separate pick course window where you may select the course you wish to enter.",
1184: youc => 'You can only use this screen to select courses in the current domain.',
1185: );
1186: my $verify_script = <<"END";
1187: <script type="text/javascript">
1188: function verifyCoursePick(caller) {
1189: var numbutton = getIndex(caller)
1190: var pickedCourse = document.rolechoice.elements[numbutton+4].value
1191: var pickedDomain = document.rolechoice.elements[numbutton+2].value
1192: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1193: if (pickedCourse != '') {
1194: if (numbutton != -1) {
1195: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
1196: document.rolechoice.elements[numbutton+1].name = courseTarget
1197: document.rolechoice.submit()
1198: }
1199: }
1200: else {
1201: alert("$lt{'plsu'}");
1202: }
1203: }
1204: else {
1205: alert("$lt{'youc'}")
1206: }
1207: }
1208: function getIndex(caller) {
1209: for (var i=0;i<document.rolechoice.elements.length;i++) {
1210: if (document.rolechoice.elements[i] == caller) {
1211: return i;
1212: }
1213: }
1214: return -1;
1215: }
1216: </script>
1217: END
1218: return $verify_script;
1219: }
1220:
1221: sub coauthorlink {
1222: my ($dcdom,$rowtype) = @_;
1223: my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
1224: my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
1225: return $coauthorform.$hiddenitems;
1226: }
1227:
1228: sub display_cc_role {
1229: my $rolekey = shift;
1230: my $roletext;
1231: my $advanced = $env{'user.adv'};
1232: my $tryagain = $env{'form.tryagain'};
1233: unless ($rolekey =~/^error\:/) {
1234: if ($rolekey =~ m-^user\.role.cc\./($match_domain)/($match_courseid)$-) {
1235: my $tcourseid = $1.'_'.$2;
1236: my $trolecode = 'cc./'.$1.'/'.$2;
1237: my $twhere;
1238: my $ttype;
1239: my $tbg='#77FF77';
1240: my $tfont='#003300';
1241: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1242: if (%newhash) {
1243: $twhere=$newhash{'description'}.
1244: ' <font size="-2">'.
1245: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1,$tfont).
1246: '</font>';
1247: $ttype = $newhash{'type'};
1248: } else {
1249: $twhere=&mt('Currently not available');
1250: $env{'course.'.$tcourseid.'.description'}=$twhere;
1251: }
1252: my $trole = &Apache::lonnet::plaintext('cc',$ttype);
1253: $twhere.="<br />".&mt('Domain').":".$1;
1254: $roletext = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$tfont,$trole,$twhere,'','','',1,'');
1255: }
1256: }
1257: return ($roletext);
1258: }
1259:
1260: sub adhoc_roles_row {
1261: my ($dcdom,$rowtype) = @_;
1262: my $output = '<tr bgcolor="#77FF77">'.
1263: ' <td colspan="5"><table><tr><td><span class="LC_rolesinfo">'
1264: .&mt('[_1]Ad hoc[_2] roles in domain [_3] --',
1265: '<span class="LC_cusr_emph">','</span>',$dcdom).'</span></td><td>';
1266: my $selectcclink = &courselink($dcdom,$rowtype);
1267: my $ccrole = &Apache::lonnet::plaintext('cc');
1268: my $carole = &Apache::lonnet::plaintext('ca');
1269: my $selectcalink = &coauthorlink($dcdom,$rowtype);
1270: $output.= '<span class="LC_rolesinfo">'.
1271: &mt('[_1]: [_2]',$ccrole,$selectcclink).
1272: '</span><br /></td><td> </td><td><span class="LC_rolesinfo">'.
1273: &mt('[_1]: [_2]',$carole,$selectcalink).
1274: '</span><br /></td></tr></table></td></tr>'.
1275: '<tr><td colspan="5" height="3"></td></tr>'."\n";
1276: return $output;
1277: }
1278:
1279: sub recent_filename {
1280: my $area=shift;
1281: return 'nohist_recent_'.&escape($area);
1282: }
1283:
1284: sub set_privileges {
1285: # role can be cc or ca
1286: my ($dcdom,$pickedcourse,$role) = @_;
1287: my $area = '/'.$dcdom.'/'.$pickedcourse;
1288: my $spec = $role.'.'.$area;
1289: my %userroles = &Apache::lonnet::set_arearole($role,$area,'','',
1290: $env{'user.domain'},
1291: $env{'user.name'});
1292: my %ccrole = ();
1293: &Apache::lonnet::standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
1294: my ($author,$adv)= &Apache::lonnet::set_userprivs(\%userroles,\%ccrole);
1295: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1296:
1297: &Apache::lonnet::log($env{'user.domain'},
1298: $env{'user.name'},
1299: $env{'user.home'},
1300: "Role ".$role);
1301: &Apache::lonnet::appenv(
1302: {'request.role' => $spec,
1303: 'request.role.domain' => $dcdom,
1304: 'request.course.sec' => ''});
1305: my $tadv=0;
1306: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1307: &Apache::lonnet::appenv({'request.role.adv' => $tadv});
1308: }
1309:
1310: sub courseloadpage {
1311: my ($courseid) = @_;
1312: my $startpage;
1313: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1314: [$courseid.':courseinit']);
1315: my ($tmp) = %entry_settings;
1316: unless ($tmp =~ /^error: 2 /) {
1317: $startpage = $entry_settings{$courseid.':courseinit'};
1318: }
1319: if ($startpage eq '') {
1320: if (exists($env{'environment.course_init_display'})) {
1321: $startpage = $env{'environment.course_init_display'};
1322: }
1323: }
1324: return $startpage;
1325: }
1326:
1327: 1;
1328: __END__
1329:
1330: =head1 NAME
1331:
1332: Apache::lonroles - User Roles Screen
1333:
1334: =head1 SYNOPSIS
1335:
1336: Invoked by /etc/httpd/conf/srm.conf:
1337:
1338: <Location /adm/roles>
1339: PerlAccessHandler Apache::lonacc
1340: SetHandler perl-script
1341: PerlHandler Apache::lonroles
1342: ErrorDocument 403 /adm/login
1343: ErrorDocument 500 /adm/errorhandler
1344: </Location>
1345:
1346: =head1 OVERVIEW
1347:
1348: =head2 Choosing Roles
1349:
1350: C<lonroles> is a handler that allows a user to switch roles in
1351: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1352: default role that a user has before selecting a role, as widely as
1353: possible, but certain handlers for example need specification which
1354: course they should act on, etc. Both in this scenario, and when the
1355: handler determines via C<lonnet>'s C<&allowed> function that a certain
1356: action is not allowed, C<lonroles> is used as error handler. This
1357: allows the user to select another role which may have permission to do
1358: what they were trying to do. C<lonroles> can also be accessed via the
1359: B<CRS> button in the Remote Control.
1360:
1361: =begin latex
1362:
1363: \begin{figure}
1364: \begin{center}
1365: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1366: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1367: \end{center}
1368: \end{figure}
1369:
1370: =end latex
1371:
1372: =head2 Role Initialization
1373:
1374: 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.
1375:
1376: =head1 INTRODUCTION
1377:
1378: This module enables a user to select what role he wishes to
1379: operate under (instructor, student, teaching assistant, course
1380: coordinator, etc). These roles are pre-established by the actions
1381: of upper-level users.
1382:
1383: This is part of the LearningOnline Network with CAPA project
1384: described at http://www.lon-capa.org.
1385:
1386: =head1 HANDLER SUBROUTINE
1387:
1388: This routine is called by Apache and mod_perl.
1389:
1390: =over 4
1391:
1392: =item *
1393:
1394: Roles Initialization (yes/no)
1395:
1396: =item *
1397:
1398: Get Error Message from Environment
1399:
1400: =item *
1401:
1402: Who is this?
1403:
1404: =item *
1405:
1406: Generate Page Output
1407:
1408: =item *
1409:
1410: Choice or no choice
1411:
1412: =item *
1413:
1414: Table
1415:
1416: =item *
1417:
1418: Privileges
1419:
1420: =back
1421:
1422: =cut
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