1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.32 2001/12/21 16:57:54 harris41 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: #
43: ###
44:
45: package Apache::lonroles;
46:
47: use strict;
48: use Apache::lonnet();
49: use Apache::lonuserstate();
50: use Apache::Constants qw(:common);
51: use Apache::File();
52: use Apache::lonmenu;
53: use Apache::loncommon;
54:
55: sub handler {
56:
57: my $r = shift;
58:
59: my $now=time;
60: my $then=$ENV{'user.login.time'};
61: my $envkey;
62:
63:
64: # ================================================================== Roles Init
65:
66: if ($ENV{'form.selectrole'}) {
67: &Apache::lonnet::appenv("request.course.id" => '',
68: "request.course.fn" => '',
69: "request.course.uri" => '',
70: "request.course.sec" => '',
71: "request.role" => 'cm');
72: foreach $envkey (keys %ENV) {
73: if ($envkey=~/^user\.role\./) {
74: my ($dum1,$dum2,$role,@pwhere)=split(/\./,$envkey);
75: my $where=join('.',@pwhere);
76: my $trolecode=$role.'.'.$where;
77: if ($ENV{'form.'.$trolecode}) {
78: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
79: my $tstatus='is';
80: if ($tstart) {
81: if ($tstart>$then) {
82: $tstatus='future';
83: }
84: }
85: if ($tend) {
86: if ($tend<$then) { $tstatus='expired'; }
87: if ($tend<$now) { $tstatus='will_not'; }
88: }
89: if ($tstatus eq 'is') {
90: $where=~s/^\///;
91: my ($cdom,$cnum,$csec)=split(/\//,$where);
92: &Apache::lonnet::appenv('request.role' => $trolecode,
93: 'request.course.sec' => $csec);
94: my $msg='Entering course ...';
95: if (($cnum) && ($role ne 'ca')) {
96: my ($furl,$ferr)=
97: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
98: if (($ENV{'form.orgurl'}) &&
99: ($ENV{'form.orgurl'}!~/^\/adm\/flip/)) {
100: $r->internal_redirect($ENV{'form.orgurl'});
101: return OK;
102: } else {
103: unless ($ENV{'request.course.id'}) {
104: &Apache::lonnet::appenv(
105: "request.course.id" => $cdom.'_'.$cnum);
106: $furl='/adm/notfound.html';
107: $msg=
108: '<h1><font color=red>Could not initialize top-level map.</font></h1>';
109: }
110: $r->content_type('text/html');
111: &Apache::loncommon::no_cache($r);
112: $r->send_http_header;
113: my $swinfo=&Apache::lonmenu::rawconfig;
114: print (<<ENDREDIR);
115: <head><title>Entering Course</title>
116: <meta HTTP-EQUIV="Refresh" CONTENT="1; url=$furl">
117: </head>
118: <html>
119: <body bgcolor="#FFFFFF">
120: <script>
121: $swinfo
122: </script>
123: $msg
124: </body>
125: </html>
126: ENDREDIR
127: return OK;
128: }
129: }
130: }
131: }
132: }
133: }
134: }
135:
136:
137: # =============================================================== No Roles Init
138:
139: $r->content_type('text/html');
140: &Apache::loncommon::no_cache($r);
141: $r->send_http_header;
142: return OK if $r->header_only;
143:
144: my $swinfo=&Apache::lonmenu::rawconfig;
145: $r->print(<<ENDHEADER);
146: <html>
147: <head>
148: <title>LON-CAPA User Roles</title>
149: </head><body bgcolor="#FFFFFF">
150: <script>
151: $swinfo
152: window.focus();
153: </script>
154: ENDHEADER
155:
156: # ------------------------------------------ Get Error Message from Environment
157:
158: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$ENV{'user.error.msg'});
159: if ($ENV{'user.error.msg'}) {
160: $r->log_reason(
161: "$msg for $ENV{'user.name'} domain $ENV{'user.domain'} access $priv",$fn);
162: }
163:
164: # ---------------------------------------------------------------- Who is this?
165:
166: my $advanced=0;
167: foreach $envkey (keys %ENV) {
168: if ($envkey=~/^user\.role\./) {
169: my ($dum1,$dum2,$role,@pwhere)=split(/\./,$envkey);
170: if ($role ne 'st') { $advanced=1; }
171: }
172: }
173:
174: # -------------------------------------------------------- Generate Page Output
175: # --------------------------------------------------------------- Error Header?
176: if ($error) {
177: $r->print("<h1>LON-CAPA Access Control</h1>");
178: $r->print("<hr><pre>Access : ".
179: Apache::lonnet::plaintext($priv)."\n");
180: $r->print("Resource: $fn\n");
181: $r->print("Action : $msg\n</pre><hr>");
182: } else {
183: $r->print("<h1>LON-CAPA User Roles</h1>");
184: if ($ENV{'user.error.msg'}) {
185: $r->print(
186: '<h3><font color=red>You need to choose another user role or '.
187: 'enter a specific course for this function</font></h3>');
188: }
189: }
190: # -------------------------------------------------------- Choice or no choice?
191: if ($nochoose) {
192: if ($advanced) {
193: $r->print("<h2>Assigned User Roles</h2>\n");
194: } else {
195: $r->print("<h2>Sorry ...</h2>\nThis resource might be part of");
196: if ($ENV{'request.course.id'}) {
197: $r->print(' another');
198: } else {
199: $r->print(' a certain');
200: }
201: $r->print(' course.</body></html>');
202: return OK;
203: }
204: } else {
205: if ($advanced) {
206: $r->print("<h2>Select a User Role</h2>\n");
207: } else {
208: $r->print("<h2>Enter a Course</h2>\n");
209: }
210: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
211: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
212: }
213: $r->print('<form method=post action="'.(($fn)?$fn:$r->uri).'">');
214: $r->print('<input type=hidden name=orgurl value="'.$fn.'">');
215: $r->print('<input type=hidden name=selectrole value=1>');
216: }
217: $r->print('<br>Show all roles: <input type=checkbox name=showall');
218: if ($ENV{'form.showall'}) { $r->print(' checked'); }
219: $r->print('><input type=submit value="Display"><br>');
220: # ----------------------------------------------------------------------- Table
221: $r->print('<table><tr>');
222: unless ($nochoose) { $r->print('<th> </th>'); }
223: $r->print('<th>User Role</th><th colspan=2>Extent</th>'.
224: '<th>Start</th><th>End</th><th>Remark</th></tr>'."\n");
225:
226: foreach $envkey (sort keys %ENV) {
227: if ($envkey=~/^user\.role\./) {
228: my ($dum1,$dum2,$role,@pwhere)=split(/\./,$envkey);
229: my $where=join('.',@pwhere);
230: my $trolecode=$role.'.'.$where;
231: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
232: my $tremark='';
233: my $tstatus='is';
234: my $tpstart=' ';
235: my $tpend=' ';
236: if ($tstart) {
237: if ($tstart>$then) {
238: $tstatus='future';
239: if ($tstart<$now) { $tstatus='will'; }
240: }
241: $tpstart=localtime($tstart);
242: }
243: if ($tend) {
244: if ($tend<$then) {
245: $tstatus='expired';
246: } elsif ($tend<$now) {
247: $tstatus='will_not';
248: }
249: $tpend=localtime($tend);
250: }
251: if ($ENV{'request.role'} eq $trolecode) {
252: $tstatus='selected';
253: }
254: my $tbg;
255: if (($tstatus eq 'is') || ($tstatus eq 'selected') ||
256: ($ENV{'form.showall'})) {
257: if ($tstatus eq 'is') {
258: $tbg='#77FF77';
259: } elsif ($tstatus eq 'future') {
260: $tbg='#FFFF77';
261: } elsif ($tstatus eq 'will') {
262: $tbg='#FFAA77';
263: $tremark.='Active at next login. ';
264: } elsif ($tstatus eq 'expired') {
265: $tbg='#FF7777';
266: } elsif ($tstatus eq 'will_not') {
267: $tbg='#AAFF77';
268: $tremark.='Expired after logout. ';
269: } elsif ($tstatus eq 'selected') {
270: $tbg='#11CC55';
271: $tremark.='Currently selected. ';
272: }
273: my $trole;
274: if ($role =~ /^cr\//) {
275: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
276: $tremark.='<br>Defined by '.$rauthor.' at '.$rdomain.'.';
277: $trole=$rrole;
278: } else {
279: $trole=Apache::lonnet::plaintext($role);
280: }
281: my $ttype;
282: my $twhere;
283: my ($tdom,$trest,$tsection)=
284: split(/\//,Apache::lonnet::declutter($where));
285: if ($trest) {
286: if ($role eq 'ca') {
287: $ttype='Construction Space';
288: $twhere='User: '.$trest.'<br>Domain: '.$tdom;
289: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
290: } else {
291: $ttype='Course';
292: if ($tsection) {
293: $ttype.='<br>Section/Group: '.$tsection;
294: }
295: my $tcourseid=$tdom.'_'.$trest;
296: if ($ENV{'course.'.$tcourseid.'.description'}) {
297: $twhere=$ENV{'course.'.$tcourseid.'.description'};
298: } else {
299: my %newhash=Apache::lonnet::coursedescription($tcourseid);
300: if (%newhash) {
301: $twhere=$newhash{'description'};
302: } else {
303: $twhere='Currently not available';
304: $ENV{'course.'.$tcourseid.'.description'}=$twhere;
305: }
306: }
307: }
308: } elsif ($tdom) {
309: $ttype='Domain';
310: $twhere=$tdom;
311: } else {
312: $ttype='System';
313: $twhere='system wide';
314: }
315:
316: $r->print('<tr bgcolor='.$tbg.'>');
317: unless ($nochoose) {
318: if ($tstatus eq 'is') {
319: $r->print('<td><input type=submit value=Select name="'.
320: $trolecode.'"></td>');
321: } elsif ($ENV{'user.adv'}) {
322: $r->print(
323: '<td><input type=submit value="Re-Initialize" name="'.
324: $trolecode.'"></td>');
325: } else {
326: $r->print('<td> </td>');
327: }
328: }
329: $r->print('<td>'.$trole.'</td><td>'.
330: $ttype.'</td><td>'.$twhere.'</td><td>'.$tpstart.
331: '</td><td>'.$tpend.
332: '</td><td>'.$tremark.' </td></tr>'."\n");
333: }
334: }
335: }
336: my $tremark='';
337: if ($ENV{'request.role'} eq 'cm') {
338: $r->print('<tr bgcolor="#11CC55">');
339: $tremark='Currently selected.';
340: } else {
341: $r->print('<tr bgcolor="#77FF77">');
342: }
343: unless ($nochoose) {
344: if ($ENV{'request.role'} ne 'cm') {
345: $r->print('<td><input type=submit value=Select name="cm"></td>');
346: } else {
347: $r->print('<td> </td>');
348: }
349: }
350: $r->print('<td colspan=5>No role specified'.
351: '</td><td>'.$tremark.' </td></tr>'."\n");
352:
353: $r->print('</table>');
354: unless ($nochoose) {
355: $r->print("</form>\n");
356: }
357: # ------------------------------------------------------------ Privileges Info
358: if ($advanced) {
359: $r->print('<hr><h2>Current Privileges</h2>');
360:
361: foreach $envkey (sort keys %ENV) {
362: if ($envkey=~/^user\.priv\.$ENV{'request.role'}\./) {
363: my $where=$envkey;
364: $where=~s/^user\.priv\.$ENV{'request.role'}\.//;
365: my $ttype;
366: my $twhere;
367: my ($tdom,$trest,$tsec)=
368: split(/\//,Apache::lonnet::declutter($where));
369: if ($trest) {
370: if ($ENV{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
371: $ttype='Construction Space';
372: $twhere='User: '.$trest.', Domain: '.$tdom;
373: } else {
374: $ttype='Course';
375: $twhere=$ENV{'course.'.$tdom.'_'.$trest.'.description'};
376: if ($tsec) {
377: $twhere.=' (Section/Group: '.$tsec.')';
378: }
379: }
380: } elsif ($tdom) {
381: $ttype='Domain';
382: $twhere=$tdom;
383: } else {
384: $ttype='System';
385: $twhere='/';
386: }
387: $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
388: foreach (sort split(/:/,$ENV{$envkey})) {
389: if ($_) {
390: my ($prv,$restr)=split(/\&/,$_);
391: my $trestr='';
392: if ($restr ne 'F') {
393: my $i;
394: $trestr.=' (';
395: for ($i=0;$i<length($restr);$i++) {
396: $trestr.=
397: Apache::lonnet::plaintext(substr($restr,$i,1));
398: if ($i<length($restr)-1) { $trestr.=', '; }
399: }
400: $trestr.=')';
401: }
402: $r->print('<li>'.Apache::lonnet::plaintext($prv).$trestr.
403: '</li>');
404: }
405: }
406: $r->print('</ul>');
407: }
408: }
409: }
410:
411: $r->print("</body></html>\n");
412: return OK;
413: }
414:
415: 1;
416: __END__
417:
418: =head1 NAME
419:
420: Apache::lonroles - User Roles Screen
421:
422: =head1 SYNOPSIS
423:
424: Invoked by /etc/httpd/conf/srm.conf:
425:
426: <Location /adm/roles>
427: PerlAccessHandler Apache::lonacc
428: SetHandler perl-script
429: PerlHandler Apache::lonroles
430: ErrorDocument 403 /adm/login
431: ErrorDocument 500 /adm/errorhandler
432: </Location>
433:
434: =head1 INTRODUCTION
435:
436: This module enables a user to select what role he wishes to
437: operate under (instructor, student, teaching assistant, course
438: coordinator, etc). These roles are pre-established by the actions
439: of upper-level users.
440:
441: This is part of the LearningOnline Network with CAPA project
442: described at http://www.lon-capa.org.
443:
444: =head1 HANDLER SUBROUTINE
445:
446: This routine is called by Apache and mod_perl.
447:
448: =over 4
449:
450: =item *
451:
452: Roles Initialization (yes/no)
453:
454: =item *
455:
456: Get Error Message from Environment
457:
458: =item *
459:
460: Who is this?
461:
462: =item *
463:
464: Generate Page Output
465:
466: =item *
467:
468: Choice or no choice
469:
470: =item *
471:
472: Table
473:
474: =item *
475:
476: Privileges
477:
478: =back
479:
480: =cut
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