1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.169 2006/10/20 22:05:55 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonroles;
31:
32: use strict;
33: use Apache::lonnet;
34: use Apache::lonuserstate();
35: use Apache::Constants qw(:common);
36: use Apache::File();
37: use Apache::lonmenu;
38: use Apache::loncommon;
39: use Apache::lonhtmlcommon;
40: use Apache::lonannounce;
41: use Apache::lonlocal;
42: use Apache::lonpageflip();
43: use Apache::lonnavdisplay();
44: use GDBM_File;
45: use LONCAPA;
46:
47:
48: sub redirect_user {
49: my ($r,$title,$url,$msg,$launch_nav) = @_;
50: $msg = $title if (! defined($msg));
51: &Apache::loncommon::content_type($r,'text/html');
52: &Apache::loncommon::no_cache($r);
53: $r->send_http_header;
54: my $swinfo=&Apache::lonmenu::rawconfig();
55: my $navwindow;
56: if ($launch_nav eq 'on') {
57: $navwindow.=&Apache::lonnavdisplay::launch_win('now',undef,undef,
58: ($url =~ m-^/adm/whatsnew-));
59: } else {
60: $navwindow.=&Apache::lonnavmaps::close();
61: }
62: my $start_page = &Apache::loncommon::start_page('Switching Role',undef,
63: {'redirect' => [1,$url],});
64: my $end_page = &Apache::loncommon::end_page();
65:
66: # Note to style police:
67: # This must only replace the spaces, nothing else, or it bombs elsewhere.
68: $url=~s/ /\%20/g;
69: $r->print(<<ENDREDIR);
70: $start_page
71: <script type="text/javascript">
72: $swinfo
73: </script>
74: $navwindow
75: <h1>$msg</h1>
76: $end_page
77: ENDREDIR
78: return;
79: }
80:
81: sub error_page {
82: my ($r,$error,$dest)=@_;
83: &Apache::loncommon::content_type($r,'text/html');
84: &Apache::loncommon::no_cache($r);
85: $r->send_http_header;
86: return OK if $r->header_only;
87: $r->print(&Apache::loncommon::start_page('Problems during Course Initialization').
88: '<script type="text/javascript">'.
89: &Apache::lonmenu::rawconfig().'</script>'.
90: '<p>'.&mt('The following problems occurred:').
91: $error.
92: '</p><br /><a href="'.$dest.'">'.&mt('Continue').'</a>'.
93: &Apache::loncommon::end_page());
94: }
95:
96: sub handler {
97:
98: my $r = shift;
99:
100: my $now=time;
101: my $then=$env{'user.login.time'};
102: my $envkey;
103: my %dcroles = ();
104: my $numdc = &check_fordc(\%dcroles,$then);
105: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
106:
107: # ================================================================== Roles Init
108: if ($env{'form.selectrole'}) {
109: if ($env{'form.newrole'}) {
110: $env{'form.'.$env{'form.newrole'}}=1;
111: }
112: if ($env{'request.course.id'}) {
113: my %temp=('logout_'.$env{'request.course.id'} => time);
114: &Apache::lonnet::put('email_status',\%temp);
115: &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
116: }
117: &Apache::lonnet::appenv("request.course.id" => '',
118: "request.course.fn" => '',
119: "request.course.uri" => '',
120: "request.course.sec" => '',
121: "request.role" => 'cm',
122: "request.role.adv" => $env{'user.adv'},
123: "request.role.domain" => $env{'user.domain'});
124:
125: # Check if user is a DC trying to enter a course and needs privs to be created
126: if ($numdc > 0) {
127: foreach my $envkey (keys %env) {
128: if (my ($domain,$coursenum) =
129: ($envkey =~ m-^form\.cc\./(\w+)/(\w+)$-)) {
130: if ($dcroles{$domain}) {
131: &check_privs($domain,$coursenum,$then,$now);
132: }
133: last;
134: }
135: }
136: }
137:
138: foreach $envkey (keys %env) {
139: next if ($envkey!~/^user\.role\./);
140: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
141: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
142: if ($env{'form.'.$trolecode}) {
143: if ($tstatus eq 'is') {
144: $where=~s/^\///;
145: my ($cdom,$cnum,$csec)=split(/\//,$where);
146: # check for course groups
147: my %coursegroups = &Apache::lonnet::get_active_groups(
148: $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
149: my $cgrps = join(':',keys(%coursegroups));
150:
151: # store role if recent_role list being kept
152: if ($env{'environment.recentroles'}) {
153: my %frozen_roles =
154: &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
155: &Apache::lonhtmlcommon::store_recent('roles',
156: $trolecode,' ',$frozen_roles{$trolecode});
157: }
158:
159:
160: # check for keyed access
161: if (($role eq 'st') &&
162: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
163: # who is key authority?
164: my $authdom=$cdom;
165: my $authnum=$cnum;
166: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
167: ($authnum,$authdom)=
168: split(/\W/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
169: }
170: # check with key authority
171: unless (&Apache::lonnet::validate_access_key(
172: $env{'environment.key.'.$cdom.'_'.$cnum},
173: $authdom,$authnum)) {
174: # there is no valid key
175: if ($env{'form.newkey'}) {
176: # student attempts to register a new key
177: &Apache::loncommon::content_type($r,'text/html');
178: &Apache::loncommon::no_cache($r);
179: $r->send_http_header;
180: my $swinfo=&Apache::lonmenu::rawconfig();
181: my $start_page=&Apache::loncommon::start_page
182: ('Verifying Access Key to Unlock this Course');
183: my $end_page=&Apache::loncommon::end_page();
184: my $buttontext=&mt('Enter Course');
185: my $message=&mt('Successfully registered key');
186: my $assignresult=
187: &Apache::lonnet::assign_access_key(
188: $env{'form.newkey'},
189: $authdom,$authnum,
190: $cdom,$cnum,
191: $env{'user.domain'},
192: $env{'user.name'},
193: 'Assigned from '.$ENV{'REMOTE_ADDR'}.' at '.localtime().' for '.
194: $trolecode);
195: unless ($assignresult eq 'ok') {
196: $assignresult=~s/^error\:\s*//;
197: $message=&mt($assignresult).
198: '<br /><a href="/adm/logout">'.
199: &mt('Logout').'</a>';
200: $buttontext=&mt('Re-Enter Key');
201: }
202: $r->print(<<ENDENTEREDKEY);
203: $start_page
204: <script>
205: $swinfo
206: </script>
207: <form method="post">
208: <input type="hidden" name="selectrole" value="1" />
209: <input type="hidden" name="$trolecode" value="1" />
210: <font size="+2">$message</font><br />
211: <input type="submit" value="$buttontext" />
212: </form>
213: $end_page
214: ENDENTEREDKEY
215: return OK;
216: } else {
217: # print form to enter a new key
218: &Apache::loncommon::content_type($r,'text/html');
219: &Apache::loncommon::no_cache($r);
220: $r->send_http_header;
221: my $swinfo=&Apache::lonmenu::rawconfig();
222: my $start_page=&Apache::loncommon::start_page
223: ('Enter Access Key to Unlock this Course');
224: my $end_page=&Apache::loncommon::end_page();
225: $r->print(<<ENDENTERKEY);
226: $start_page
227: <script>
228: $swinfo
229: </script>
230: <form method="post">
231: <input type="hidden" name="selectrole" value="1" />
232: <input type="hidden" name="$trolecode" value="1" />
233: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
234: <input type="submit" value="Enter key" />
235: </form>
236: $end_page
237: ENDENTERKEY
238: return OK;
239: }
240: }
241: }
242: &Apache::lonnet::log($env{'user.domain'},
243: $env{'user.name'},
244: $env{'user.home'},
245: "Role ".$trolecode);
246:
247: &Apache::lonnet::appenv(
248: 'request.role' => $trolecode,
249: 'request.role.domain' => $cdom,
250: 'request.course.sec' => $csec,
251: 'request.course.groups' => $cgrps);
252: my $tadv=0;
253:
254: if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
255: my $msg;
256: my ($furl,$ferr)=
257: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
258: if (($env{'form.orgurl'}) &&
259: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
260: my $dest=$env{'form.orgurl'};
261: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
262: &Apache::lonnet::appenv('request.role.adv'=>$tadv);
263: if (($ferr) && ($tadv)) {
264: &error_page($r,$ferr,$dest);
265: } else {
266: $r->internal_redirect($dest);
267: }
268: return OK;
269: } else {
270: if (!$env{'request.course.id'}) {
271: &Apache::lonnet::appenv(
272: "request.course.id" => $cdom.'_'.$cnum);
273: $furl='/adm/roles?tryagain=1';
274: $msg=
275: '<h1><span class="LC_error">'.
276: &mt('Could not initialize [_1] at this time.',
277: $env{'course.'.$cdom.'_'.$cnum.'.description'}).
278: '</span></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
279: }
280: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
281: &Apache::lonnet::appenv('request.role.adv'=>$tadv);
282:
283: if (($ferr) && ($tadv)) {
284: &error_page($r,$ferr,$furl);
285: } else {
286: # Check to see if the user is a CC entering a course
287: # for the first time
288: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
289: if (substr($courseid, 0, 1) eq '/') {
290: $courseid = substr($courseid, 1);
291: }
292: $courseid =~ s/\//_/;
293: if ($role eq 'cc' && $env{'course.' . $courseid .
294: '.course.helper.not.run'}) {
295: $furl = "/adm/helper/course.initialization.helper";
296: # Send the user to the course they selected
297: } elsif ($env{'request.course.id'}) {
298: if (&Apache::lonnet::allowed('whn',
299: $env{'request.course.id'})
300: || &Apache::lonnet::allowed('whn',
301: $env{'request.course.id'}.'/'
302: .$env{'request.course.sec'})
303: ) {
304: my $startpage = &courseloadpage($courseid);
305: unless ($startpage eq 'firstres') {
306: $msg = &mt('Entering [_1] ....',
307: $env{'course.'.$courseid.'.description'});
308: &redirect_user($r,&mt('New in course'),
309: '/adm/whatsnew?refpage=start',$msg,
310: $env{'environment.remotenavmap'});
311: return OK;
312: }
313: }
314: }
315: # Are we allowed to look at the first resource?
316: if ($furl !~ m|^/adm/|) {
317: # Guess not ...
318: $furl=&Apache::lonpageflip::first_accessible_resource();
319: }
320: $msg = &mt('Entering [_1] ...',
321: $env{'course.'.$courseid.'.description'});
322: &redirect_user($r,&mt('Entering [_1]',
323: $env{'course.'.$courseid.'.description'}),
324: $furl,$msg,
325: $env{'environment.remotenavmap'});
326: }
327: return OK;
328: }
329: }
330: #
331: # Send the user to the construction space they selected
332: if ($role =~ /^(au|ca|aa)$/) {
333: my $redirect_url = '/priv/';
334: if ($role eq 'au') {
335: $redirect_url.=$env{'user.name'};
336: } else {
337: $where =~ /\/(.*)$/;
338: $redirect_url .= $1;
339: }
340: $redirect_url .= '/';
341: &redirect_user($r,&mt('Entering Construction Space'),
342: $redirect_url);
343: return OK;
344: }
345: if ($role eq 'dc') {
346: my $redirect_url = '/adm/menu/';
347: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
348: $redirect_url);
349: return OK;
350: }
351: }
352: }
353: }
354: }
355:
356:
357: # =============================================================== No Roles Init
358:
359: &Apache::loncommon::content_type($r,'text/html');
360: &Apache::loncommon::no_cache($r);
361: $r->send_http_header;
362: return OK if $r->header_only;
363:
364: my $swinfo=&Apache::lonmenu::rawconfig();
365: my $start_page=&Apache::loncommon::start_page('User Roles');
366: my $standby=&mt('Role selected. Please stand by.');
367: $standby=~s/\n/\\n/g;
368:
369: $r->print(<<ENDHEADER);
370: $start_page
371: <br />
372: <script>
373: $swinfo
374: window.focus();
375:
376: active=true;
377:
378: function enterrole (thisform,rolecode,buttonname) {
379: if (active) {
380: active=false;
381: document.title='$standby';
382: window.status='$standby';
383: thisform.newrole.value=rolecode;
384: thisform.submit();
385: } else {
386: alert('$standby');
387: }
388: }
389: </script>
390: ENDHEADER
391:
392: # ------------------------------------------ Get Error Message from Environment
393:
394: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
395: if ($env{'user.error.msg'}) {
396: $r->log_reason(
397: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
398: }
399:
400: # ------------------------------------------------- Can this user re-init, etc?
401:
402: my $advanced=$env{'user.adv'};
403: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
404: my $tryagain=$env{'form.tryagain'};
405:
406: # -------------------------------------------------------- Generate Page Output
407: # --------------------------------------------------------------- Error Header?
408: if ($error) {
409: $r->print("<h1>LON-CAPA Access Control</h1>");
410: $r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>Access : ".
411: Apache::lonnet::plaintext($priv)."\n");
412: $r->print("Resource: ".&Apache::lonenc::check_encrypt($fn)."\n");
413: $r->print("Action : $msg\n</pre><hr />");
414: my $url=$fn;
415: my $last;
416: if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
417: &GDBM_READER(),0640)) {
418: $last=$hash{'last_known'};
419: untie(%hash);
420: }
421: if ($last) { $fn.='?symb='.&escape($last); }
422:
423: &Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
424: &Apache::lonenc::check_encrypt($fn));
425: } else {
426: if ($env{'user.error.msg'}) {
427: $r->print(
428: '<h3><span class="LC_error">'.
429: &mt('You need to choose another user role or enter a specific course for this function').'</span></h3>');
430: }
431: }
432: # -------------------------------------------------------- Choice or no choice?
433: if ($nochoose) {
434: $r->print("<h2>".&mt('Sorry ...')."</h2>\n".
435: &mt('This action is currently not authorized.').
436: &Apache::loncommon::end_page());
437: return OK;
438: } else {
439: if ($advanced) {
440: $r->print(&mt("Your home server is ").
441: $Apache::lonnet::hostname{&Apache::lonnet::homeserver
442: ($env{'user.name'},$env{'user.domain'})}.
443: "<br />\n");
444: $r->print(&mt(
445: "Author and Co-Author roles are not available on servers other than their respective home servers."));
446: }
447: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
448: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
449: }
450: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
451: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
452: $r->print('<input type="hidden" name="selectrole" value="1" />');
453: $r->print('<input type="hidden" name="newrole" value="" />');
454: }
455: if ($env{'user.adv'}) {
456: $r->print(
457: '<br /><label>'.&mt('Show all roles').': <input type="checkbox" name="showall"');
458: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
459: $r->print(' /></label><input type="submit" value="'.&mt('Display').'" />');
460: }
461:
462: my (%roletext,%sortrole,%roleclass);
463: my $countactive=0;
464: my $inrole=0;
465: my $possiblerole='';
466: foreach $envkey (sort keys %env) {
467: my $button = 1;
468: my $switchserver='';
469: my $roletext;
470: my $sortkey;
471: if ($envkey=~/^user\.role\./) {
472: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
473: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
474: next if (!defined($role) || $role eq '' || $role =~ /^gr/);
475: $tremark='';
476: $tpstart=' ';
477: $tpend=' ';
478: $tfont='#000000';
479: if ($tstart) {
480: $tpstart=&Apache::lonlocal::locallocaltime($tstart);
481: }
482: if ($tend) {
483: $tpend=&Apache::lonlocal::locallocaltime($tend);
484: }
485: if ($env{'request.role'} eq $trolecode) {
486: $tstatus='selected';
487: }
488: my $tbg;
489: if (($tstatus eq 'is')
490: || ($tstatus eq 'selected')
491: || ($tstatus eq 'will')
492: || ($tstatus eq 'future')
493: || ($env{'form.showall'})) {
494: if ($tstatus eq 'is') {
495: $tbg='#77FF77';
496: $tfont='#003300';
497: $possiblerole=$trolecode;
498: $countactive++;
499: } elsif ($tstatus eq 'future') {
500: $tbg='#FFFF77';
501: $button=0;
502: } elsif ($tstatus eq 'will') {
503: $tbg='#FFAA77';
504: $tremark.=&mt('Active at next login. ');
505: } elsif ($tstatus eq 'expired') {
506: $tbg='#FF7777';
507: $tfont='#330000';
508: $button=0;
509: } elsif ($tstatus eq 'will_not') {
510: $tbg='#AAFF77';
511: $tremark.=&mt('Expired after logout. ');
512: } elsif ($tstatus eq 'selected') {
513: $tbg='#11CC55';
514: $tfont='#002200';
515: $inrole=1;
516: $countactive++;
517: $tremark.=&mt('Currently selected. ');
518: }
519: my $trole;
520: if ($role =~ /^cr\//) {
521: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
522: if ($tremark) { $tremark.='<br />'; }
523: $tremark.=&mt('Defined by ').$rauthor.
524: &mt(' at ').$rdomain.'.';
525: }
526: $trole=Apache::lonnet::plaintext($role);
527: my $ttype;
528: my $twhere;
529: my ($tdom,$trest,$tsection)=
530: split(/\//,Apache::lonnet::declutter($where));
531: # First, Co-Authorship roles
532: if (($role eq 'ca') || ($role eq 'aa')) {
533: my $home = &Apache::lonnet::homeserver($trest,$tdom);
534: my $allowed=0;
535: my @ids=&Apache::lonnet::current_machine_ids();
536: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
537: if (!$allowed) {
538: $button=0;
539: $switchserver='otherserver='.$home.'&role='.$trolecode;
540: }
541: #next if ($home eq 'no_host');
542: $home = $Apache::lonnet::hostname{$home};
543: $ttype='Construction Space';
544: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
545: ': '.$tdom.'<br />'.
546: ' '.&mt('Server').': '.$home;
547: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
548: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
549: $sortkey=$role."$trest:$tdom";
550: } elsif ($role eq 'au') {
551: # Authors
552: my $home = &Apache::lonnet::homeserver
553: ($env{'user.name'},$env{'user.domain'});
554: my $allowed=0;
555: my @ids=&Apache::lonnet::current_machine_ids();
556: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
557: if (!$allowed) {
558: $button=0;
559: $switchserver='otherserver='.$home.'&role='.$trolecode;
560: }
561: #next if ($home eq 'no_host');
562: $home = $Apache::lonnet::hostname{$home};
563: $ttype='Construction Space';
564: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
565: ': '.$home;
566: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
567: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
568: $sortkey=$role;
569: } elsif ($trest) {
570: my $tcourseid=$tdom.'_'.$trest;
571: $ttype = &Apache::loncommon::course_type($tcourseid);
572: $trole = &Apache::lonnet::plaintext($role,$ttype);
573: if ($env{'course.'.$tcourseid.'.description'}) {
574: $twhere=$env{'course.'.$tcourseid.'.description'};
575: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
576: unless ($twhere eq &mt('Currently not available')) {
577: $twhere.=' <font size="-2">'.
578: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
579: '</font>';
580: }
581: } else {
582: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
583: if (%newhash) {
584: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
585: "\0".$envkey;
586: $twhere=$newhash{'description'}.
587: ' <font size="-2">'.
588: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
589: '</font>';
590: $ttype = $newhash{'type'};
591: $trole = &Apache::lonnet::plaintext($role,$ttype);
592: } else {
593: $twhere=&mt('Currently not available');
594: $env{'course.'.$tcourseid.'.description'}=$twhere;
595: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
596: $ttype = 'Unavailable';
597: }
598: }
599: if ($tsection) {
600: $twhere.='<br />'.&mt('Section/Group').': '.$tsection;
601: }
602: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
603: } elsif ($tdom) {
604: $ttype='Domain';
605: $twhere=$tdom;
606: $sortkey=$role.$twhere;
607: } else {
608: $ttype='System';
609: $twhere=&mt('system wide');
610: $sortkey=$role.$twhere;
611: }
612: $roletext.=&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver);
613: $roletext{$envkey}=$roletext;
614: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
615: $sortrole{$sortkey}=$envkey;
616: $roleclass{$envkey}=$ttype;
617: }
618: }
619: }
620: # No active roles
621: if ($countactive==0) {
622: if ($inrole) {
623: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
624: } else {
625: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
626: }
627: $r->print('</form>'.&Apache::loncommon::end_page());
628: return OK;
629: # Is there only one choice?
630: } elsif (($countactive==1) && ($env{'request.role'} eq 'cm')) {
631: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
632: '<input type="hidden" name="'.$possiblerole.'" value="1" />');
633: $r->print("</form>\n");
634: $r->rflush();
635: $r->print('<script>document.forms.rolechoice.submit();</script>');
636: $r->print(&Apache::loncommon::end_page());
637: return OK;
638: }
639: # More than one possible role
640: # ----------------------------------------------------------------------- Table
641: unless (($advanced) || ($nochoose)) {
642: $r->print("<h2>".&mt('Select a Course/Group to Enter')."</h2>\n");
643: }
644: $r->print('<br /><table><tr>');
645: unless ($nochoose) { $r->print('<th> </th>'); }
646: $r->print('<th>'.&mt('User Role').'</th><th>'.&mt('Extent').
647: '</th><th>'.&mt('Start').'</th><th>'.&mt('End').'</th></tr>'."\n");
648: my $doheaders=-1;
649: foreach my $type ('Domain','Construction Space','Course','Group','Unavailable','System') {
650: my $haverole=0;
651: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
652: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
653: $haverole=1;
654: }
655: }
656: if ($haverole) { $doheaders++; }
657: }
658:
659: if ($env{'environment.recentroles'}) {
660: my %recent_roles =
661: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
662: my $output='';
663: foreach (sort(keys(%recent_roles))) {
664: if (defined($roletext{'user.role.'.$_})) {
665: $output.=$roletext{'user.role.'.$_};
666: if ($_ =~ m-dc\./(\w+)/- && $dcroles{$1}) {
667: $output .= &allcourses_row($1,'recent');
668: }
669: } elsif ($numdc > 0) {
670: unless ($_ =~/^error\:/) {
671: $output.=&display_cc_role('user.role.'.$_);
672: }
673: }
674: }
675: if ($output) {
676: $r->print("<tr><td align='center' colspan='5'><font face='arial'>".
677: &mt('Recent Roles')."</font></td>");
678: $r->print($output);
679: $r->print("</tr>");
680: $doheaders ++;
681: }
682: }
683:
684: if ($numdc > 0) {
685: $r->print(&coursepick_jscript());
686: $r->print(&Apache::loncommon::coursebrowser_javascript());
687: }
688: foreach my $type ('Construction Space','Domain','Course','Group','Unavailable','System') {
689: my $output;
690: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
691: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
692: $output.=$roletext{$sortrole{$which}};
693: if ($sortrole{$which} =~ m-dc\./(\w+)/-) {
694: if ($dcroles{$1}) {
695: $output .= &allcourses_row($1,'');
696: }
697: }
698: }
699: }
700: if ($output) {
701: if ($doheaders > 0) {
702: $r->print("<tr>".
703: "<td align='center' colspan='5'><font face='arial'>".&mt($type)."</font></td></tr>");
704: }
705: $r->print($output);
706: }
707: }
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: $r->print('<tr bgcolor="#77FF77">');
716: }
717: unless ($nochoose) {
718: if ($env{'request.role'} ne 'cm') {
719: $r->print('<td><input type="submit" value="'.
720: &mt('Select').'" name="cm"></td>');
721: } else {
722: $r->print('<td> </td>');
723: }
724: }
725: $r->print('<td colspan="3"><font color="'.$tfont.'">'.&mt('No role specified').
726: '</font></td><td><font color="'.$tfont.'">'.$tremark.
727: ' </font></td></tr>'."\n");
728:
729: $r->print('</table>');
730: unless ($nochoose) {
731: $r->print("</form>\n");
732: }
733: # ------------------------------------------------------------ Privileges Info
734: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
735: $r->print('<hr /><h2>Current Privileges</h2>');
736:
737: foreach $envkey (sort keys %env) {
738: if ($envkey=~/^user\.priv\.$env{'request.role'}\./) {
739: my $where=$envkey;
740: $where=~s/^user\.priv\.$env{'request.role'}\.//;
741: my $ttype;
742: my $twhere;
743: my ($tdom,$trest,$tsec)=
744: split(/\//,Apache::lonnet::declutter($where));
745: if ($trest) {
746: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
747: $ttype='Construction Space';
748: $twhere='User: '.$trest.', Domain: '.$tdom;
749: } else {
750: $ttype=
751: &Apache::loncommon::course_type($tdom.'_'.$trest);
752: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
753: if ($tsec) {
754: $twhere.=' (Section: '.$tsec.')';
755: }
756: }
757: } elsif ($tdom) {
758: $ttype='Domain';
759: $twhere=$tdom;
760: } else {
761: $ttype='System';
762: $twhere='/';
763: }
764: $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
765: foreach (sort split(/:/,$env{$envkey})) {
766: if ($_) {
767: my ($prv,$restr)=split(/\&/,$_);
768: my $trestr='';
769: if ($restr ne 'F') {
770: my $i;
771: $trestr.=' (';
772: for ($i=0;$i<length($restr);$i++) {
773: $trestr.=
774: Apache::lonnet::plaintext(substr($restr,$i,1));
775: if ($i<length($restr)-1) { $trestr.=', '; }
776: }
777: $trestr.=')';
778: }
779: $r->print('<li>'.
780: Apache::lonnet::plaintext($prv).$trestr.
781: '</li>');
782: }
783: }
784: $r->print('</ul>');
785: }
786: }
787: }
788: $r->print(&Apache::lonnet::getannounce());
789: if ($advanced) {
790: $r->print('<p><small><i>This is LON-CAPA '.
791: $r->dir_config('lonVersion').'</i><br />'.
792: '<a href="/adm/logout">'.&mt('Logout').'</a></small></p>');
793: }
794: $r->print(&Apache::loncommon::end_page());
795: return OK;
796: }
797:
798: sub role_status {
799: my ($rolekey,$then,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
800: my @pwhere = ();
801: if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
802: (undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
803: unless (!defined($$role) || $$role eq '') {
804: $$where=join('.',@pwhere);
805: $$trolecode=$$role.'.'.$$where;
806: ($$tstart,$$tend)=split(/\./,$env{$rolekey});
807: $$tstatus='is';
808: if ($$tstart && $$tstart>$then) {
809: $$tstatus='future';
810: if ($$tstart<$now) { $$tstatus='will'; }
811: }
812: if ($$tend) {
813: if ($$tend<$then) {
814: $$tstatus='expired';
815: } elsif ($$tend<$now) {
816: $$tstatus='will_not';
817: }
818: }
819: }
820: }
821: }
822:
823: sub build_roletext {
824: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver) = @_;
825: my $roletext='<tr bgcolor="'.$tbg.'">';
826: my $is_dc=($trolecode =~ m/^dc\./);
827: my $rowspan=($is_dc) ? ''
828: : ' rowspan="2" ';
829:
830: unless ($nochoose) {
831: my $buttonname=$trolecode;
832: $buttonname=~s/\W//g;
833: if (!$button) {
834: if ($switchserver) {
835: $roletext.='<td'.$rowspan.'><a href="/adm/switchserver?'.
836: $switchserver.'">'.&mt('Switch Server').'</a></td>';
837: } else {
838: $roletext.=('<td'.$rowspan.'> </td>');
839: }
840: } elsif ($tstatus eq 'is') {
841: $roletext.='<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
842: &mt('Select').'" onClick="javascript:enterrole(this.form,\''.
843: $trolecode."','".$buttonname.'\');"></td>';
844: } elsif ($tryagain) {
845: $roletext.=
846: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
847: &mt('Try Selecting Again').'" onClick="javascript:enterrole(this.form,\''.
848: $trolecode."','".$buttonname.'\');"></td>';
849: } elsif ($advanced) {
850: $roletext.=
851: '<td'.$rowspan.'><input name="'.$buttonname.'" type="button" value="'.
852: &mt('Re-Initialize').'" onClick="javascript:enterrole(this.form,\''.
853: $trolecode."','".$buttonname.'\');"></td>';
854: } else {
855: $roletext.='<td'.$rowspan.'> </td>';
856: }
857: }
858: if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
859: $tremark.=&Apache::lonannounce::showday(time,1,
860: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
861: }
862: $roletext.='<td><font color="'.$tfont.'">'.$trole.
863: '</font></td><td><font color="'.$tfont.'">'.$twhere.
864: '</font></td><td><font color="'.$tfont.'">'.$tpstart.
865: '</font></td><td><font color="'.$tfont.'">'.$tpend.
866: '</font></td></tr>';
867: if (!$is_dc) {
868: $roletext.='<tr bgcolor="'.$tbg.'"><td colspan="4"><font color="'.$tfont.'">'.$tremark.
869: ' </font></td></tr><tr><td colspan="5" height="3"></td></tr>'."\n";
870: }
871: return $roletext;
872: }
873:
874: sub check_privs {
875: my ($cdom,$cnum,$then,$now) = @_;
876: my $cckey = 'user.role.cc./'.$cdom.'/'.$cnum;
877: if ($env{$cckey}) {
878: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
879: &role_status($cckey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
880: unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
881: &set_privileges($cdom,$cnum);
882: }
883: } else {
884: &set_privileges($cdom,$cnum);
885: }
886: }
887:
888: sub check_fordc {
889: my ($dcroles,$then) = @_;
890: my $numdc = 0;
891: if ($env{'user.adv'}) {
892: foreach my $envkey (sort keys %env) {
893: if ($envkey=~/^user\.role\.dc\.\/(\w+)\/$/) {
894: my $dcdom = $1;
895: my $livedc = 1;
896: my ($tstart,$tend)=split(/\./,$env{$envkey});
897: if ($tstart && $tstart>$then) { $livedc = 0; }
898: if ($tend && $tend <$then) { $livedc = 0; }
899: if ($livedc) {
900: $$dcroles{$dcdom} = $envkey;
901: $numdc++;
902: }
903: }
904: }
905: }
906: return $numdc;
907: }
908:
909: sub courselink {
910: my ($dcdom,$rowtype,$selecttype) = @_;
911: my $courseform=&Apache::loncommon::selectcourse_link
912: ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
913: 'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
914: $dcdom,$dcdom,undef,$selecttype);
915: my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
916: '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
917: '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
918: '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
919: return $courseform.$hiddenitems;
920: }
921:
922: sub coursepick_jscript {
923: my $verify_script = <<"END";
924: <script>
925: function verifyCoursePick(caller) {
926: var numbutton = getIndex(caller)
927: var pickedCourse = document.rolechoice.elements[numbutton+4].value
928: var pickedDomain = document.rolechoice.elements[numbutton+2].value
929: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
930: if (pickedCourse != '') {
931: if (numbutton != -1) {
932: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
933: document.rolechoice.elements[numbutton+1].name = courseTarget
934: document.rolechoice.submit()
935: }
936: }
937: else {
938: alert("Please use the 'Select Course' link to open a separate pick course window where you may select the course you wish to enter.");
939: }
940: }
941: else {
942: alert("You can only use this screen to select courses in the current domain")
943: }
944: }
945: function getIndex(caller) {
946: for (var i=0;i<document.rolechoice.elements.length;i++) {
947: if (document.rolechoice.elements[i] == caller) {
948: return i;
949: }
950: }
951: return -1;
952: }
953: </script>
954: END
955: return $verify_script;
956: }
957:
958: sub processpick {
959: my $process_pick = <<"END";
960: <script>
961: function process_pick(dom) {
962: var pickedCourse=opener.document.rolechoice.$env{'form.cnumelement'}.value;
963: var pickedDomain=opener.document.rolechoice.$env{'form.cdomelement'}.value;
964: var okDomain = 0;
965:
966: if (pickedDomain == dom) {
967: if (pickedCourse != '') {
968: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
969: opener.document.title='Role selected. Please stand by.';
970: opener.status='Role selected. Please stand by.';
971: opener.document.rolechoice.newrole.value=courseTarget
972: opener.document.rolechoice.submit()
973: }
974: } else {
975: alert("You may only use this screen to select courses in the current domain: "+dom+"\\nPlease return to the roles page window and click the 'Select Course' link for domain: "+pickedDomain+",\\n if you are a Domain Coordinator in that domain, and wish to become a Course Coordinator in a course in the domain");
976: }
977: }
978:
979: </script>
980: END
981: return $process_pick;
982: }
983:
984: sub display_cc_role {
985: my $rolekey = shift;
986: my $roletext;
987: my $advanced = $env{'user.adv'};
988: my $tryagain = $env{'form.tryagain'};
989: unless ($rolekey =~/^error\:/) {
990: if ($rolekey =~ m-^user\.role.cc\./(\w+)/(\w+)$-) {
991: my $tcourseid = $1.'_'.$2;
992: my $trolecode = 'cc./'.$1.'/'.$2;
993: my $twhere;
994: my $ttype;
995: my $tbg='#77FF77';
996: my $tfont='#003300';
997: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
998: if (%newhash) {
999: $twhere=$newhash{'description'}.
1000: ' <font size="-2">'.
1001: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1,$tfont).
1002: '</font>';
1003: $ttype = $newhash{'type'};
1004: } else {
1005: $twhere=&mt('Currently not available');
1006: $env{'course.'.$tcourseid.'.description'}=$twhere;
1007: }
1008: my $trole = &Apache::lonnet::plaintext('cc',$ttype);
1009: $twhere.="<br />".&mt('Domain').":".$1;
1010: $roletext = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$tfont,$trole,$twhere,'','','',1,'');
1011: }
1012: }
1013: return ($roletext);
1014: }
1015:
1016: sub allcourses_row {
1017: my ($dcdom,$rowtype) = @_;
1018: my $output = '<tr bgcolor="#77FF77">'.
1019: ' <td colspan="5">';
1020: foreach my $type ('Course','Group') {
1021: my $selectlink = &courselink($dcdom,$rowtype,$type);
1022: my $ccrole = &Apache::lonnet::plaintext('cc',$type);
1023: $output.= '<font color="#002200">'.$ccrole.'</font>'.
1024: ' <b>'.$selectlink.'</b>'.
1025: ' from '.&mt('Domain').' '.$dcdom.'<br />';
1026: }
1027: $output .= '</tr><tr><td colspan="5" height="3"></td></tr>'."\n";
1028: return $output;
1029: }
1030:
1031: sub recent_filename {
1032: my $area=shift;
1033: return 'nohist_recent_'.&escape($area);
1034: }
1035:
1036: sub set_privileges {
1037: my ($dcdom,$pickedcourse) = @_;
1038: my $area = '/'.$dcdom.'/'.$pickedcourse;
1039: my $role = 'cc';
1040: my $spec = $role.'.'.$area;
1041: my %userroles = &Apache::lonnet::set_arearole($role,$area,'','',
1042: $env{'user.domain'},
1043: $env{'user.name'});
1044: my %ccrole = ();
1045: &Apache::lonnet::standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
1046: my ($author,$adv)= &Apache::lonnet::set_userprivs(\%userroles,\%ccrole);
1047: &Apache::lonnet::appenv(%userroles);
1048: &Apache::lonnet::log($env{'user.domain'},
1049: $env{'user.name'},
1050: $env{'user.home'},
1051: "Role ".$role);
1052: &Apache::lonnet::appenv(
1053: 'request.role' => $spec,
1054: 'request.role.domain' => $dcdom,
1055: 'request.course.sec' => '');
1056: my $tadv=0;
1057: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1058: &Apache::lonnet::appenv('request.role.adv' => $tadv);
1059: }
1060:
1061: sub courseloadpage {
1062: my ($courseid) = @_;
1063: my $startpage;
1064: my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
1065: [$courseid.':courseinit']);
1066: my ($tmp) = %entry_settings;
1067: unless ($tmp =~ /^error: 2 /) {
1068: $startpage = $entry_settings{$courseid.':courseinit'};
1069: }
1070: if ($startpage eq '') {
1071: if (exists($env{'environment.course_init_display'})) {
1072: $startpage = $env{'environment.course_init_display'};
1073: }
1074: }
1075: return $startpage;
1076: }
1077:
1078: 1;
1079: __END__
1080:
1081: =head1 NAME
1082:
1083: Apache::lonroles - User Roles Screen
1084:
1085: =head1 SYNOPSIS
1086:
1087: Invoked by /etc/httpd/conf/srm.conf:
1088:
1089: <Location /adm/roles>
1090: PerlAccessHandler Apache::lonacc
1091: SetHandler perl-script
1092: PerlHandler Apache::lonroles
1093: ErrorDocument 403 /adm/login
1094: ErrorDocument 500 /adm/errorhandler
1095: </Location>
1096:
1097: =head1 OVERVIEW
1098:
1099: =head2 Choosing Roles
1100:
1101: C<lonroles> is a handler that allows a user to switch roles in
1102: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1103: default role that a user has before selecting a role, as widely as
1104: possible, but certain handlers for example need specification which
1105: course they should act on, etc. Both in this scenario, and when the
1106: handler determines via C<lonnet>'s C<&allowed> function that a certain
1107: action is not allowed, C<lonroles> is used as error handler. This
1108: allows the user to select another role which may have permission to do
1109: what they were trying to do. C<lonroles> can also be accessed via the
1110: B<CRS> button in the Remote Control.
1111:
1112: =begin latex
1113:
1114: \begin{figure}
1115: \begin{center}
1116: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1117: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1118: \end{center}
1119: \end{figure}
1120:
1121: =end latex
1122:
1123: =head2 Role Initialization
1124:
1125: 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.
1126:
1127: =head1 INTRODUCTION
1128:
1129: This module enables a user to select what role he wishes to
1130: operate under (instructor, student, teaching assistant, course
1131: coordinator, etc). These roles are pre-established by the actions
1132: of upper-level users.
1133:
1134: This is part of the LearningOnline Network with CAPA project
1135: described at http://www.lon-capa.org.
1136:
1137: =head1 HANDLER SUBROUTINE
1138:
1139: This routine is called by Apache and mod_perl.
1140:
1141: =over 4
1142:
1143: =item *
1144:
1145: Roles Initialization (yes/no)
1146:
1147: =item *
1148:
1149: Get Error Message from Environment
1150:
1151: =item *
1152:
1153: Who is this?
1154:
1155: =item *
1156:
1157: Generate Page Output
1158:
1159: =item *
1160:
1161: Choice or no choice
1162:
1163: =item *
1164:
1165: Table
1166:
1167: =item *
1168:
1169: Privileges
1170:
1171: =back
1172:
1173: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonroles.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / auth