1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.42 2002/08/28 14:11:27 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # (Directory Indexer
29: # (Login Screen
30: # YEAR=1999
31: # 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14 Gerd Kortemeyer)
32: # 11/23 Gerd Kortemeyer)
33: # YEAR=2000
34: # 1/14,03/06,06/01,07/22,07/24,07/25,
35: # 09/04,09/06,09/28,09/29,09/30,10/2,10/5,10/26,10/28,
36: # 12/08,12/28,
37: # YEAR=2001
38: # 01/15/01 Gerd Kortemeyer
39: # 02/27/01 Scott Harrison
40: # 03/02,05/03,05/25,05/30,06/01,07/06,08/06 Gerd Kortemeyer
41: # 12/21 Scott Harrison
42: # 12/29 Gerd Kortemeyer
43: #
44: ###
45:
46: package Apache::lonroles;
47:
48: use strict;
49: use Apache::lonnet();
50: use Apache::lonuserstate();
51: use Apache::Constants qw(:common);
52: use Apache::File();
53: use Apache::lonmenu;
54: use Apache::loncommon;
55:
56: sub handler {
57:
58: my $r = shift;
59:
60: my $now=time;
61: my $then=$ENV{'user.login.time'};
62: my $envkey;
63:
64:
65: # ================================================================== Roles Init
66:
67: if ($ENV{'form.selectrole'}) {
68: if ($ENV{'request.course.id'}) {
69: my %temp=('logout_'.$ENV{'request.course.id'} => time);
70: &Apache::lonnet::put('email_status',\%temp);
71: }
72: &Apache::lonnet::appenv("request.course.id" => '',
73: "request.course.fn" => '',
74: "request.course.uri" => '',
75: "request.course.sec" => '',
76: "request.role" => 'cm',
77: "request.role.domain" => $ENV{'user.domain'});
78: foreach $envkey (keys %ENV) {
79: next if ($envkey!~/^user\.role\./);
80: my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
81: my $where=join('.',@pwhere);
82: my $trolecode=$role.'.'.$where;
83: if ($ENV{'form.'.$trolecode}) {
84: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
85: my $tstatus='is';
86: if ($tstart) {
87: if ($tstart>$then) {
88: $tstatus='future';
89: }
90: }
91: if ($tend) {
92: if ($tend<$then) { $tstatus='expired'; }
93: if ($tend<$now) { $tstatus='will_not'; }
94: }
95: if ($tstatus eq 'is') {
96: $where=~s/^\///;
97: my ($cdom,$cnum,$csec)=split(/\//,$where);
98: &Apache::lonnet::appenv('request.role' => $trolecode,
99: 'request.role.domain' => $cdom,
100: 'request.course.sec' => $csec);
101: my $msg='Entering course ...';
102: if (($cnum) && ($role ne 'ca')) {
103: my ($furl,$ferr)=
104: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
105: if (($ENV{'form.orgurl'}) &&
106: ($ENV{'form.orgurl'}!~/^\/adm\/flip/)) {
107: $r->internal_redirect($ENV{'form.orgurl'});
108: return OK;
109: } else {
110: unless ($ENV{'request.course.id'}) {
111: &Apache::lonnet::appenv(
112: "request.course.id" => $cdom.'_'.$cnum);
113: $furl='/adm/notfound.html';
114: $msg=
115: '<h1><font color=red>Could not initialize top-level map.</font></h1>';
116: }
117: $r->content_type('text/html');
118: &Apache::loncommon::no_cache($r);
119: $r->send_http_header;
120: my $swinfo=&Apache::lonmenu::rawconfig($r);
121: print (<<ENDREDIR);
122: <head><title>Entering Course</title>
123: <meta HTTP-EQUIV="Refresh" CONTENT="1; url=$furl">
124: </head>
125: <html>
126: <body bgcolor="#FFFFFF">
127: <script>
128: $swinfo
129: </script>
130: $msg
131: </body>
132: </html>
133: ENDREDIR
134: return OK;
135: }
136: }
137: }
138: }
139: }
140: }
141:
142:
143: # =============================================================== No Roles Init
144:
145: $r->content_type('text/html');
146: &Apache::loncommon::no_cache($r);
147: $r->send_http_header;
148: return OK if $r->header_only;
149:
150: my $swinfo=&Apache::lonmenu::rawconfig($r);
151: my $bodytag=&Apache::loncommon::bodytag('User Roles');
152: $r->print(<<ENDHEADER);
153: <html>
154: <head>
155: <title>LON-CAPA User Roles</title>
156: </head>
157: $bodytag
158: <script>
159: $swinfo
160: window.focus();
161: </script>
162: ENDHEADER
163:
164: # ------------------------------------------ Get Error Message from Environment
165:
166: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$ENV{'user.error.msg'});
167: if ($ENV{'user.error.msg'}) {
168: $r->log_reason(
169: "$msg for $ENV{'user.name'} domain $ENV{'user.domain'} access $priv",$fn);
170: }
171:
172: # ---------------------------------------------------------------- Who is this?
173:
174: my $advanced=0;
175: foreach $envkey (keys %ENV) {
176: if ($envkey=~/^user\.role\./) {
177: my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
178: if ($role ne 'st') { $advanced=1; }
179: }
180: }
181:
182: # -------------------------------------------------------- Generate Page Output
183: # --------------------------------------------------------------- Error Header?
184: if ($error) {
185: $r->print("<h1>LON-CAPA Access Control</h1>");
186: $r->print("<hr><pre>Access : ".
187: Apache::lonnet::plaintext($priv)."\n");
188: $r->print("Resource: $fn\n");
189: $r->print("Action : $msg\n</pre><hr>");
190: } else {
191: if ($ENV{'user.error.msg'}) {
192: $r->print(
193: '<h3><font color=red>You need to choose another user role or '.
194: 'enter a specific course for this function</font></h3>');
195: }
196: }
197: # -------------------------------------------------------- Choice or no choice?
198: if ($nochoose) {
199: if ($advanced) {
200: $r->print("<h2>Assigned User Roles</h2>\n");
201: } else {
202: $r->print("<h2>Sorry ...</h2>\nThis resource might be part of");
203: if ($ENV{'request.course.id'}) {
204: $r->print(' another');
205: } else {
206: $r->print(' a certain');
207: }
208: $r->print(' course.</body></html>');
209: return OK;
210: }
211: } else {
212: if ($advanced) {
213: $r->print("Your home server is ".
214: $Apache::lonnet::hostname{&Apache::lonnet::homeserver
215: ($ENV{'user.name'},$ENV{'user.domain'})}.
216: "<br />\n");
217: $r->print("Author and Co-Author roles may not be available on ".
218: "servers other than your home server.");
219: } else {
220: $r->print("<h2>Enter a Course</h2>\n");
221: }
222: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
223: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
224: }
225: $r->print('<form method=post action="'.(($fn)?$fn:$r->uri).'">');
226: $r->print('<input type=hidden name=orgurl value="'.$fn.'">');
227: $r->print('<input type=hidden name=selectrole value=1>');
228: }
229: $r->print('<br>Show all roles: <input type=checkbox name=showall');
230: if ($ENV{'form.showall'}) { $r->print(' checked'); }
231: $r->print('><input type=submit value="Display"><br>');
232: # ----------------------------------------------------------------------- Table
233: $r->print('<table><tr>');
234: unless ($nochoose) { $r->print('<th> </th>'); }
235: $r->print('<th>User Role</th><th colspan=2>Extent</th>'.
236: '<th>Start</th><th>End</th><th>Remark</th></tr>'."\n");
237:
238: foreach $envkey (sort keys %ENV) {
239: my $button = 1;
240: if ($envkey=~/^user\.role\./) {
241: my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
242: my $where=join('.',@pwhere);
243: my $trolecode=$role.'.'.$where;
244: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
245: my $tremark='';
246: my $tstatus='is';
247: my $tpstart=' ';
248: my $tpend=' ';
249: if ($tstart) {
250: if ($tstart>$then) {
251: $tstatus='future';
252: if ($tstart<$now) { $tstatus='will'; }
253: }
254: $tpstart=localtime($tstart);
255: }
256: if ($tend) {
257: if ($tend<$then) {
258: $tstatus='expired';
259: } elsif ($tend<$now) {
260: $tstatus='will_not';
261: }
262: $tpend=localtime($tend);
263: }
264: if ($ENV{'request.role'} eq $trolecode) {
265: $tstatus='selected';
266: }
267: my $tbg;
268: if (($tstatus eq 'is') || ($tstatus eq 'selected') ||
269: ($ENV{'form.showall'})) {
270: if ($tstatus eq 'is') {
271: $tbg='#77FF77';
272: } elsif ($tstatus eq 'future') {
273: $tbg='#FFFF77';
274: } elsif ($tstatus eq 'will') {
275: $tbg='#FFAA77';
276: $tremark.='Active at next login. ';
277: } elsif ($tstatus eq 'expired') {
278: $tbg='#FF7777';
279: } elsif ($tstatus eq 'will_not') {
280: $tbg='#AAFF77';
281: $tremark.='Expired after logout. ';
282: } elsif ($tstatus eq 'selected') {
283: $tbg='#11CC55';
284: $tremark.='Currently selected. ';
285: }
286: my $trole;
287: if ($role =~ /^cr\//) {
288: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
289: $tremark.='<br>Defined by '.$rauthor.' at '.$rdomain.'.';
290: $trole=$rrole;
291: } else {
292: $trole=Apache::lonnet::plaintext($role);
293: }
294: my $ttype;
295: my $twhere;
296: my ($tdom,$trest,$tsection)=
297: split(/\//,Apache::lonnet::declutter($where));
298: # First, Co-Authorship roles
299: if ($role eq 'ca') {
300: my $home = &Apache::lonnet::homeserver($trest,$tdom);
301: $button = 0 if ($home ne $r->dir_config('lonHostID'));
302: #next if ($home eq 'no_host');
303: $home = $Apache::lonnet::hostname{$home};
304: $ttype='Construction Space';
305: $twhere='User: '.$trest.'<br />Domain: '.$tdom.'<br />'.
306: ' Server: '.$home;
307: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
308: } elsif ($role eq 'au') {
309: # Authors
310: my $home = &Apache::lonnet::homeserver
311: ($ENV{'user.name'},$ENV{'user.domain'});
312: $button = 0 if ($home ne $r->dir_config('lonHostID'));
313: #next if ($home eq 'no_host');
314: $home = $Apache::lonnet::hostname{$home};
315: $ttype='Construction Space';
316: $twhere='Domain: '.$tdom.'<br />Server: '.$home;
317: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
318: } elsif ($trest) {
319: $ttype='Course';
320: if ($tsection) {
321: $ttype.='<br>Section/Group: '.$tsection;
322: }
323: my $tcourseid=$tdom.'_'.$trest;
324: if ($ENV{'course.'.$tcourseid.'.description'}) {
325: $twhere=
326: &Apache::loncommon::syllabuswrapper($ENV{'course.'.$tcourseid.'.description'},
327: $trest,$tdom);
328: } else {
329: my %newhash=Apache::lonnet::coursedescription
330: ($tcourseid);
331: if (%newhash) {
332: $twhere=$newhash{'description'};
333: } else {
334: $twhere='Currently not available';
335: $ENV{'course.'.$tcourseid.'.description'}=$twhere;
336: }
337: }
338: if ($role ne 'st') { $twhere.="<br />Domain:".$tdom; }
339: } elsif ($tdom) {
340: $ttype='Domain';
341: $twhere=$tdom;
342: } else {
343: $ttype='System';
344: $twhere='system wide';
345: }
346:
347: # ----- do not trust the indention below here -----
348: $r->print('<tr bgcolor='.$tbg.'>');
349: unless ($nochoose) {
350: if (!$button) {
351: $r->print('<td> </td>');
352: } elsif ($tstatus eq 'is') {
353: $r->print('<td><input type=submit value=Select name="'.
354: $trolecode.'"></td>');
355: } elsif ($ENV{'user.adv'}) {
356: $r->print
357: ('<td><input type=submit value="Re-Initialize"'.
358: ' name="'.$trolecode.'"></td>');
359: } else {
360: $r->print('<td> </td>');
361: }
362: }
363: $r->print('<td>'.$trole.'</td><td>'.
364: $ttype.'</td><td>'.$twhere.'</td><td>'.$tpstart.
365: '</td><td>'.$tpend.
366: '</td><td>'.$tremark.' </td></tr>'."\n");
367: }
368: }
369: }
370: my $tremark='';
371: if ($ENV{'request.role'} eq 'cm') {
372: $r->print('<tr bgcolor="#11CC55">');
373: $tremark='Currently selected.';
374: } else {
375: $r->print('<tr bgcolor="#77FF77">');
376: }
377: unless ($nochoose) {
378: if ($ENV{'request.role'} ne 'cm') {
379: $r->print('<td><input type=submit value=Select name="cm"></td>');
380: } else {
381: $r->print('<td> </td>');
382: }
383: }
384: $r->print('<td colspan=5>No role specified'.
385: '</td><td>'.$tremark.' </td></tr>'."\n");
386:
387: $r->print('</table>');
388: unless ($nochoose) {
389: $r->print("</form>\n");
390: }
391: # ------------------------------------------------------------ Privileges Info
392: if ($advanced) {
393: $r->print('<hr><h2>Current Privileges</h2>');
394:
395: foreach $envkey (sort keys %ENV) {
396: if ($envkey=~/^user\.priv\.$ENV{'request.role'}\./) {
397: my $where=$envkey;
398: $where=~s/^user\.priv\.$ENV{'request.role'}\.//;
399: my $ttype;
400: my $twhere;
401: my ($tdom,$trest,$tsec)=
402: split(/\//,Apache::lonnet::declutter($where));
403: if ($trest) {
404: if ($ENV{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
405: $ttype='Construction Space';
406: $twhere='User: '.$trest.', Domain: '.$tdom;
407: } else {
408: $ttype='Course';
409: $twhere=$ENV{'course.'.$tdom.'_'.$trest.'.description'};
410: if ($tsec) {
411: $twhere.=' (Section/Group: '.$tsec.')';
412: }
413: }
414: } elsif ($tdom) {
415: $ttype='Domain';
416: $twhere=$tdom;
417: } else {
418: $ttype='System';
419: $twhere='/';
420: }
421: $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
422: foreach (sort split(/:/,$ENV{$envkey})) {
423: if ($_) {
424: my ($prv,$restr)=split(/\&/,$_);
425: my $trestr='';
426: if ($restr ne 'F') {
427: my $i;
428: $trestr.=' (';
429: for ($i=0;$i<length($restr);$i++) {
430: $trestr.=
431: Apache::lonnet::plaintext(substr($restr,$i,1));
432: if ($i<length($restr)-1) { $trestr.=', '; }
433: }
434: $trestr.=')';
435: }
436: $r->print('<li>'.Apache::lonnet::plaintext($prv).$trestr.
437: '</li>');
438: }
439: }
440: $r->print('</ul>');
441: }
442: }
443: }
444:
445: $r->print("</body></html>\n");
446: return OK;
447: }
448:
449: 1;
450: __END__
451:
452: =head1 NAME
453:
454: Apache::lonroles - User Roles Screen
455:
456: =head1 SYNOPSIS
457:
458: Invoked by /etc/httpd/conf/srm.conf:
459:
460: <Location /adm/roles>
461: PerlAccessHandler Apache::lonacc
462: SetHandler perl-script
463: PerlHandler Apache::lonroles
464: ErrorDocument 403 /adm/login
465: ErrorDocument 500 /adm/errorhandler
466: </Location>
467:
468: =head1 INTRODUCTION
469:
470: This module enables a user to select what role he wishes to
471: operate under (instructor, student, teaching assistant, course
472: coordinator, etc). These roles are pre-established by the actions
473: of upper-level users.
474:
475: This is part of the LearningOnline Network with CAPA project
476: described at http://www.lon-capa.org.
477:
478: =head1 HANDLER SUBROUTINE
479:
480: This routine is called by Apache and mod_perl.
481:
482: =over 4
483:
484: =item *
485:
486: Roles Initialization (yes/no)
487:
488: =item *
489:
490: Get Error Message from Environment
491:
492: =item *
493:
494: Who is this?
495:
496: =item *
497:
498: Generate Page Output
499:
500: =item *
501:
502: Choice or no choice
503:
504: =item *
505:
506: Table
507:
508: =item *
509:
510: Privileges
511:
512: =back
513:
514: =cut
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