1: # The LearningOnline Network with CAPA
2: # User Roles Screen
3: #
4: # $Id: lonroles.pm,v 1.33 2001/12/29 21:09:47 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: foreach $envkey (keys %ENV) {
78: if ($envkey=~/^user\.role\./) {
79: my ($dum1,$dum2,$role,@pwhere)=split(/\./,$envkey);
80: my $where=join('.',@pwhere);
81: my $trolecode=$role.'.'.$where;
82: if ($ENV{'form.'.$trolecode}) {
83: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
84: my $tstatus='is';
85: if ($tstart) {
86: if ($tstart>$then) {
87: $tstatus='future';
88: }
89: }
90: if ($tend) {
91: if ($tend<$then) { $tstatus='expired'; }
92: if ($tend<$now) { $tstatus='will_not'; }
93: }
94: if ($tstatus eq 'is') {
95: $where=~s/^\///;
96: my ($cdom,$cnum,$csec)=split(/\//,$where);
97: &Apache::lonnet::appenv('request.role' => $trolecode,
98: 'request.course.sec' => $csec);
99: my $msg='Entering course ...';
100: if (($cnum) && ($role ne 'ca')) {
101: my ($furl,$ferr)=
102: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
103: if (($ENV{'form.orgurl'}) &&
104: ($ENV{'form.orgurl'}!~/^\/adm\/flip/)) {
105: $r->internal_redirect($ENV{'form.orgurl'});
106: return OK;
107: } else {
108: unless ($ENV{'request.course.id'}) {
109: &Apache::lonnet::appenv(
110: "request.course.id" => $cdom.'_'.$cnum);
111: $furl='/adm/notfound.html';
112: $msg=
113: '<h1><font color=red>Could not initialize top-level map.</font></h1>';
114: }
115: $r->content_type('text/html');
116: &Apache::loncommon::no_cache($r);
117: $r->send_http_header;
118: my $swinfo=&Apache::lonmenu::rawconfig;
119: print (<<ENDREDIR);
120: <head><title>Entering Course</title>
121: <meta HTTP-EQUIV="Refresh" CONTENT="1; url=$furl">
122: </head>
123: <html>
124: <body bgcolor="#FFFFFF">
125: <script>
126: $swinfo
127: </script>
128: $msg
129: </body>
130: </html>
131: ENDREDIR
132: return OK;
133: }
134: }
135: }
136: }
137: }
138: }
139: }
140:
141:
142: # =============================================================== No Roles Init
143:
144: $r->content_type('text/html');
145: &Apache::loncommon::no_cache($r);
146: $r->send_http_header;
147: return OK if $r->header_only;
148:
149: my $swinfo=&Apache::lonmenu::rawconfig;
150: $r->print(<<ENDHEADER);
151: <html>
152: <head>
153: <title>LON-CAPA User Roles</title>
154: </head><body bgcolor="#FFFFFF">
155: <script>
156: $swinfo
157: window.focus();
158: </script>
159: ENDHEADER
160:
161: # ------------------------------------------ Get Error Message from Environment
162:
163: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$ENV{'user.error.msg'});
164: if ($ENV{'user.error.msg'}) {
165: $r->log_reason(
166: "$msg for $ENV{'user.name'} domain $ENV{'user.domain'} access $priv",$fn);
167: }
168:
169: # ---------------------------------------------------------------- Who is this?
170:
171: my $advanced=0;
172: foreach $envkey (keys %ENV) {
173: if ($envkey=~/^user\.role\./) {
174: my ($dum1,$dum2,$role,@pwhere)=split(/\./,$envkey);
175: if ($role ne 'st') { $advanced=1; }
176: }
177: }
178:
179: # -------------------------------------------------------- Generate Page Output
180: # --------------------------------------------------------------- Error Header?
181: if ($error) {
182: $r->print("<h1>LON-CAPA Access Control</h1>");
183: $r->print("<hr><pre>Access : ".
184: Apache::lonnet::plaintext($priv)."\n");
185: $r->print("Resource: $fn\n");
186: $r->print("Action : $msg\n</pre><hr>");
187: } else {
188: $r->print("<h1>LON-CAPA User Roles</h1>");
189: if ($ENV{'user.error.msg'}) {
190: $r->print(
191: '<h3><font color=red>You need to choose another user role or '.
192: 'enter a specific course for this function</font></h3>');
193: }
194: }
195: # -------------------------------------------------------- Choice or no choice?
196: if ($nochoose) {
197: if ($advanced) {
198: $r->print("<h2>Assigned User Roles</h2>\n");
199: } else {
200: $r->print("<h2>Sorry ...</h2>\nThis resource might be part of");
201: if ($ENV{'request.course.id'}) {
202: $r->print(' another');
203: } else {
204: $r->print(' a certain');
205: }
206: $r->print(' course.</body></html>');
207: return OK;
208: }
209: } else {
210: if ($advanced) {
211: $r->print("<h2>Select a User Role</h2>\n");
212: } else {
213: $r->print("<h2>Enter a Course</h2>\n");
214: }
215: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
216: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
217: }
218: $r->print('<form method=post action="'.(($fn)?$fn:$r->uri).'">');
219: $r->print('<input type=hidden name=orgurl value="'.$fn.'">');
220: $r->print('<input type=hidden name=selectrole value=1>');
221: }
222: $r->print('<br>Show all roles: <input type=checkbox name=showall');
223: if ($ENV{'form.showall'}) { $r->print(' checked'); }
224: $r->print('><input type=submit value="Display"><br>');
225: # ----------------------------------------------------------------------- Table
226: $r->print('<table><tr>');
227: unless ($nochoose) { $r->print('<th> </th>'); }
228: $r->print('<th>User Role</th><th colspan=2>Extent</th>'.
229: '<th>Start</th><th>End</th><th>Remark</th></tr>'."\n");
230:
231: foreach $envkey (sort keys %ENV) {
232: if ($envkey=~/^user\.role\./) {
233: my ($dum1,$dum2,$role,@pwhere)=split(/\./,$envkey);
234: my $where=join('.',@pwhere);
235: my $trolecode=$role.'.'.$where;
236: my ($tstart,$tend)=split(/\./,$ENV{$envkey});
237: my $tremark='';
238: my $tstatus='is';
239: my $tpstart=' ';
240: my $tpend=' ';
241: if ($tstart) {
242: if ($tstart>$then) {
243: $tstatus='future';
244: if ($tstart<$now) { $tstatus='will'; }
245: }
246: $tpstart=localtime($tstart);
247: }
248: if ($tend) {
249: if ($tend<$then) {
250: $tstatus='expired';
251: } elsif ($tend<$now) {
252: $tstatus='will_not';
253: }
254: $tpend=localtime($tend);
255: }
256: if ($ENV{'request.role'} eq $trolecode) {
257: $tstatus='selected';
258: }
259: my $tbg;
260: if (($tstatus eq 'is') || ($tstatus eq 'selected') ||
261: ($ENV{'form.showall'})) {
262: if ($tstatus eq 'is') {
263: $tbg='#77FF77';
264: } elsif ($tstatus eq 'future') {
265: $tbg='#FFFF77';
266: } elsif ($tstatus eq 'will') {
267: $tbg='#FFAA77';
268: $tremark.='Active at next login. ';
269: } elsif ($tstatus eq 'expired') {
270: $tbg='#FF7777';
271: } elsif ($tstatus eq 'will_not') {
272: $tbg='#AAFF77';
273: $tremark.='Expired after logout. ';
274: } elsif ($tstatus eq 'selected') {
275: $tbg='#11CC55';
276: $tremark.='Currently selected. ';
277: }
278: my $trole;
279: if ($role =~ /^cr\//) {
280: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
281: $tremark.='<br>Defined by '.$rauthor.' at '.$rdomain.'.';
282: $trole=$rrole;
283: } else {
284: $trole=Apache::lonnet::plaintext($role);
285: }
286: my $ttype;
287: my $twhere;
288: my ($tdom,$trest,$tsection)=
289: split(/\//,Apache::lonnet::declutter($where));
290: if ($trest) {
291: if ($role eq 'ca') {
292: $ttype='Construction Space';
293: $twhere='User: '.$trest.'<br>Domain: '.$tdom;
294: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
295: } else {
296: $ttype='Course';
297: if ($tsection) {
298: $ttype.='<br>Section/Group: '.$tsection;
299: }
300: my $tcourseid=$tdom.'_'.$trest;
301: if ($ENV{'course.'.$tcourseid.'.description'}) {
302: $twhere=$ENV{'course.'.$tcourseid.'.description'};
303: } else {
304: my %newhash=Apache::lonnet::coursedescription($tcourseid);
305: if (%newhash) {
306: $twhere=$newhash{'description'};
307: } else {
308: $twhere='Currently not available';
309: $ENV{'course.'.$tcourseid.'.description'}=$twhere;
310: }
311: }
312: }
313: } elsif ($tdom) {
314: $ttype='Domain';
315: $twhere=$tdom;
316: } else {
317: $ttype='System';
318: $twhere='system wide';
319: }
320:
321: $r->print('<tr bgcolor='.$tbg.'>');
322: unless ($nochoose) {
323: if ($tstatus eq 'is') {
324: $r->print('<td><input type=submit value=Select name="'.
325: $trolecode.'"></td>');
326: } elsif ($ENV{'user.adv'}) {
327: $r->print(
328: '<td><input type=submit value="Re-Initialize" name="'.
329: $trolecode.'"></td>');
330: } else {
331: $r->print('<td> </td>');
332: }
333: }
334: $r->print('<td>'.$trole.'</td><td>'.
335: $ttype.'</td><td>'.$twhere.'</td><td>'.$tpstart.
336: '</td><td>'.$tpend.
337: '</td><td>'.$tremark.' </td></tr>'."\n");
338: }
339: }
340: }
341: my $tremark='';
342: if ($ENV{'request.role'} eq 'cm') {
343: $r->print('<tr bgcolor="#11CC55">');
344: $tremark='Currently selected.';
345: } else {
346: $r->print('<tr bgcolor="#77FF77">');
347: }
348: unless ($nochoose) {
349: if ($ENV{'request.role'} ne 'cm') {
350: $r->print('<td><input type=submit value=Select name="cm"></td>');
351: } else {
352: $r->print('<td> </td>');
353: }
354: }
355: $r->print('<td colspan=5>No role specified'.
356: '</td><td>'.$tremark.' </td></tr>'."\n");
357:
358: $r->print('</table>');
359: unless ($nochoose) {
360: $r->print("</form>\n");
361: }
362: # ------------------------------------------------------------ Privileges Info
363: if ($advanced) {
364: $r->print('<hr><h2>Current Privileges</h2>');
365:
366: foreach $envkey (sort keys %ENV) {
367: if ($envkey=~/^user\.priv\.$ENV{'request.role'}\./) {
368: my $where=$envkey;
369: $where=~s/^user\.priv\.$ENV{'request.role'}\.//;
370: my $ttype;
371: my $twhere;
372: my ($tdom,$trest,$tsec)=
373: split(/\//,Apache::lonnet::declutter($where));
374: if ($trest) {
375: if ($ENV{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
376: $ttype='Construction Space';
377: $twhere='User: '.$trest.', Domain: '.$tdom;
378: } else {
379: $ttype='Course';
380: $twhere=$ENV{'course.'.$tdom.'_'.$trest.'.description'};
381: if ($tsec) {
382: $twhere.=' (Section/Group: '.$tsec.')';
383: }
384: }
385: } elsif ($tdom) {
386: $ttype='Domain';
387: $twhere=$tdom;
388: } else {
389: $ttype='System';
390: $twhere='/';
391: }
392: $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
393: foreach (sort split(/:/,$ENV{$envkey})) {
394: if ($_) {
395: my ($prv,$restr)=split(/\&/,$_);
396: my $trestr='';
397: if ($restr ne 'F') {
398: my $i;
399: $trestr.=' (';
400: for ($i=0;$i<length($restr);$i++) {
401: $trestr.=
402: Apache::lonnet::plaintext(substr($restr,$i,1));
403: if ($i<length($restr)-1) { $trestr.=', '; }
404: }
405: $trestr.=')';
406: }
407: $r->print('<li>'.Apache::lonnet::plaintext($prv).$trestr.
408: '</li>');
409: }
410: }
411: $r->print('</ul>');
412: }
413: }
414: }
415:
416: $r->print("</body></html>\n");
417: return OK;
418: }
419:
420: 1;
421: __END__
422:
423: =head1 NAME
424:
425: Apache::lonroles - User Roles Screen
426:
427: =head1 SYNOPSIS
428:
429: Invoked by /etc/httpd/conf/srm.conf:
430:
431: <Location /adm/roles>
432: PerlAccessHandler Apache::lonacc
433: SetHandler perl-script
434: PerlHandler Apache::lonroles
435: ErrorDocument 403 /adm/login
436: ErrorDocument 500 /adm/errorhandler
437: </Location>
438:
439: =head1 INTRODUCTION
440:
441: This module enables a user to select what role he wishes to
442: operate under (instructor, student, teaching assistant, course
443: coordinator, etc). These roles are pre-established by the actions
444: of upper-level users.
445:
446: This is part of the LearningOnline Network with CAPA project
447: described at http://www.lon-capa.org.
448:
449: =head1 HANDLER SUBROUTINE
450:
451: This routine is called by Apache and mod_perl.
452:
453: =over 4
454:
455: =item *
456:
457: Roles Initialization (yes/no)
458:
459: =item *
460:
461: Get Error Message from Environment
462:
463: =item *
464:
465: Who is this?
466:
467: =item *
468:
469: Generate Page Output
470:
471: =item *
472:
473: Choice or no choice
474:
475: =item *
476:
477: Table
478:
479: =item *
480:
481: Privileges
482:
483: =back
484:
485: =cut
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