Annotation of loncom/auth/lonroles.pm, revision 1.119
1.1 harris41 1: # The LearningOnline Network with CAPA
2: # User Roles Screen
1.31 www 3: #
1.119 ! albertel 4: # $Id: lonroles.pm,v 1.118 2005/04/07 06:56:21 albertel Exp $
1.31 www 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: #
1.32 harris41 28: ###
1.22 harris41 29:
1.1 harris41 30: package Apache::lonroles;
31:
32: use strict;
1.118 albertel 33: use Apache::lonnet;
1.7 www 34: use Apache::lonuserstate();
1.1 harris41 35: use Apache::Constants qw(:common);
1.2 www 36: use Apache::File();
1.26 www 37: use Apache::lonmenu;
1.29 albertel 38: use Apache::loncommon;
1.104 raeburn 39: use Apache::lonhtmlcommon;
1.57 www 40: use Apache::lonannounce;
1.72 www 41: use Apache::lonlocal;
1.1 harris41 42:
1.62 matthew 43: sub redirect_user {
1.95 albertel 44: my ($r,$title,$url,$msg,$launch_nav) = @_;
1.62 matthew 45: $msg = $title if (! defined($msg));
1.73 www 46: &Apache::loncommon::content_type($r,'text/html');
1.62 matthew 47: &Apache::loncommon::no_cache($r);
48: $r->send_http_header;
49: my $swinfo=&Apache::lonmenu::rawconfig();
1.96 albertel 50: my $navwindow;
1.95 albertel 51: if ($launch_nav eq 'on') {
1.96 albertel 52: $navwindow.=&Apache::lonnavmaps::launch_win('now');
53: } else {
54: $navwindow.=&Apache::lonnavmaps::close();
1.95 albertel 55: }
1.62 matthew 56: my $bodytag=&Apache::loncommon::bodytag('Switching Role');
1.92 www 57: # Note to style police:
58: # This must only replace the spaces, nothing else, or it bombs elsewhere.
59: $url=~s/ /\%20/g;
1.93 albertel 60: $r->print(<<ENDREDIR);
1.62 matthew 61: <head><title>$title</title>
62: <meta HTTP-EQUIV="Refresh" CONTENT="1; url=$url">
63: </head>
64: <html>
65: $bodytag
1.96 albertel 66: <script type="text/javascript">
1.62 matthew 67: $swinfo
68: </script>
1.96 albertel 69: $navwindow
1.62 matthew 70: <h1>$msg</h1>
1.95 albertel 71: <a href="$url">Continue</a>
1.62 matthew 72: </body>
73: </html>
74: ENDREDIR
75: return;
76: }
77:
1.1 harris41 78: sub handler {
1.10 www 79:
1.1 harris41 80: my $r = shift;
81:
1.6 www 82: my $now=time;
1.118 albertel 83: my $then=$env{'user.login.time'};
1.6 www 84: my $envkey;
1.107 raeburn 85: my %dcroles = ();
86: my $numdc = &check_fordc(\%dcroles,$then);
1.10 www 87:
1.6 www 88: # ================================================================== Roles Init
1.118 albertel 89: if ($env{'form.selectrole'}) {
90: if ($env{'request.course.id'}) {
91: my %temp=('logout_'.$env{'request.course.id'} => time);
1.33 www 92: &Apache::lonnet::put('email_status',\%temp);
1.118 albertel 93: &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
1.100 albertel 94: }
1.55 albertel 95: &Apache::lonnet::appenv("request.course.id" => '',
96: "request.course.fn" => '',
97: "request.course.uri" => '',
98: "request.course.sec" => '',
99: "request.role" => 'cm',
1.118 albertel 100: "request.role.adv" => $env{'user.adv'},
101: "request.role.domain" => $env{'user.domain'});
1.106 raeburn 102:
1.110 raeburn 103: # Check if user is a DC trying to enter a course and needs privs to be created
1.107 raeburn 104: if ($numdc > 0) {
1.118 albertel 105: foreach my $envkey (keys %env) {
1.107 raeburn 106: if ($envkey =~ m-^form\.cc\./(\w+)/(\w+)$-) {
107: if ($dcroles{$1}) {
1.109 raeburn 108: my $cckey = 'user.role.cc./'.$1.'/'.$2;
1.110 raeburn 109: &check_privs($cckey,$then,$now);
1.107 raeburn 110: }
111: last;
112: }
113: }
114: }
115:
1.118 albertel 116: foreach $envkey (keys %env) {
1.40 matthew 117: next if ($envkey!~/^user\.role\./);
1.102 raeburn 118: my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
119: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
1.118 albertel 120: if ($env{'form.'.$trolecode}) {
1.55 albertel 121: if ($tstatus eq 'is') {
122: $where=~s/^\///;
123: my ($cdom,$cnum,$csec)=split(/\//,$where);
1.111 albertel 124: # store role if recent_role list being kept
1.118 albertel 125: if ($env{'environment.recentroles'}) {
1.111 albertel 126: &Apache::lonhtmlcommon::store_recent('roles',
127: $trolecode,' ');
128: }
129:
130:
1.53 www 131: # check for keyed access
1.55 albertel 132: if (($role eq 'st') &&
1.118 albertel 133: ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
1.89 www 134: # who is key authority?
135: my $authdom=$cdom;
136: my $authnum=$cnum;
1.118 albertel 137: if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
1.89 www 138: ($authnum,$authdom)=
1.118 albertel 139: split(/\W/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
1.89 www 140: }
141: # check with key authority
142: unless (&Apache::lonnet::validate_access_key(
1.118 albertel 143: $env{'environment.key.'.$cdom.'_'.$cnum},
1.89 www 144: $authdom,$authnum)) {
1.53 www 145: # there is no valid key
1.118 albertel 146: if ($env{'form.newkey'}) {
1.53 www 147: # student attempts to register a new key
1.89 www 148: &Apache::loncommon::content_type($r,'text/html');
149: &Apache::loncommon::no_cache($r);
150: $r->send_http_header;
151: my $swinfo=&Apache::lonmenu::rawconfig();
152: my $bodytag=&Apache::loncommon::bodytag
153: ('Verifying Access Key to Unlock this Course');
1.90 www 154: my $buttontext=&mt('Enter Course');
155: my $message=&mt('Successfully registered key');
156: my $assignresult=
157: &Apache::lonnet::assign_access_key(
1.118 albertel 158: $env{'form.newkey'},
1.90 www 159: $authdom,$authnum,
1.91 www 160: $cdom,$cnum,
1.118 albertel 161: $env{'user.domain'},
162: $env{'user.name'},
1.90 www 163: 'Assigned from '.$ENV{'REMOTE_ADDR'}.' at '.localtime().' for '.
164: $trolecode);
165: unless ($assignresult eq 'ok') {
166: $assignresult=~s/^error\:\s*//;
167: $message=&mt($assignresult).
168: '<br /><a href="/adm/logout">'.
1.89 www 169: &mt('Logout').'</a>';
1.90 www 170: $buttontext=&mt('Re-Enter Key');
171: }
1.89 www 172: $r->print(<<ENDENTEREDKEY);
173: <head><title>Verifying Course Access Key</title>
174: </head>
175: <html>
176: $bodytag
177: <script>
178: $swinfo
179: </script>
180: <form method="post">
181: <input type="hidden" name="selectrole" value="1" />
182: <input type="hidden" name="$trolecode" value="1" />
1.90 www 183: <font size="+2">$message</font><br />
1.89 www 184: <input type="submit" value="$buttontext" />
185: </form>
186: </body></html>
187: ENDENTEREDKEY
188: return OK;
1.55 albertel 189: } else {
1.53 www 190: # print form to enter a new key
1.73 www 191: &Apache::loncommon::content_type($r,'text/html');
1.55 albertel 192: &Apache::loncommon::no_cache($r);
193: $r->send_http_header;
194: my $swinfo=&Apache::lonmenu::rawconfig();
195: my $bodytag=&Apache::loncommon::bodytag
196: ('Enter Access Key to Unlock this Course');
197: $r->print(<<ENDENTERKEY);
1.53 www 198: <head><title>Entering Course Access Key</title>
199: </head>
200: <html>
201: $bodytag
202: <script>
203: $swinfo
204: </script>
205: <form method="post">
1.89 www 206: <input type="hidden" name="selectrole" value="1" />
207: <input type="hidden" name="$trolecode" value="1" />
1.118 albertel 208: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
1.53 www 209: <input type="submit" value="Enter key" />
210: </form>
211: </body></html>
212: ENDENTERKEY
1.55 albertel 213: return OK;
214: }
215: }
216: }
1.118 albertel 217: &Apache::lonnet::log($env{'user.domain'},
218: $env{'user.name'},
219: $env{'user.home'},
1.87 www 220: "Role ".$trolecode);
1.101 albertel 221:
1.56 www 222: &Apache::lonnet::appenv(
1.101 albertel 223: 'request.role' => $trolecode,
1.56 www 224: 'request.role.domain' => $cdom,
225: 'request.course.sec' => $csec);
1.101 albertel 226: my $tadv=0;
1.72 www 227: my $msg=&mt('Entering course ...');
1.62 matthew 228:
1.55 albertel 229: if (($cnum) && ($role ne 'ca')) {
230: my ($furl,$ferr)=
231: &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
1.118 albertel 232: if (($env{'form.orgurl'}) &&
233: ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
234: my $dest=$env{'form.orgurl'};
1.117 albertel 235: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
236: &Apache::lonnet::appenv('request.role.adv'=>$tadv);
1.67 albertel 237: $r->internal_redirect($dest);
1.55 albertel 238: return OK;
239: } else {
1.118 albertel 240: unless ($env{'request.course.id'}) {
1.55 albertel 241: &Apache::lonnet::appenv(
242: "request.course.id" => $cdom.'_'.$cnum);
1.61 www 243: $furl='/adm/roles?tryagain=1';
1.55 albertel 244: $msg=
1.72 www 245: '<h1><font color=red>'.
246: &mt('Could not initialize course at this time.').
247: '</font></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
1.55 albertel 248: }
1.117 albertel 249: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
250: &Apache::lonnet::appenv('request.role.adv'=>$tadv);
1.58 bowersj2 251:
252: # Check to see if the user is a CC entering a course
253: # for the first time
254: my (undef, undef, $role, $courseid) = split(/\./, $envkey);
255: if (substr($courseid, 0, 1) eq '/') {
256: $courseid = substr($courseid, 1);
257: }
258: $courseid =~ s/\//_/;
1.118 albertel 259: if ($role eq 'cc' && $env{'course.' . $courseid .
1.58 bowersj2 260: '.course.helper.not.run'}) {
261: $furl = "/adm/helper/course.initialization.helper";
262: }
1.62 matthew 263: # Send the user to the course they selected
1.78 sakharuk 264: &redirect_user($r,&mt('Entering Course'),
1.95 albertel 265: $furl,$msg,
1.118 albertel 266: $env{'environment.remotenavmap'});
1.20 www 267: return OK;
1.55 albertel 268: }
269: }
1.62 matthew 270: #
271: # Send the user to the construction space they selected
272: if ($role =~ /^(au|ca)$/) {
273: my $redirect_url = '/priv/';
274: if ($role eq 'au') {
1.118 albertel 275: $redirect_url.=$env{'user.name'};
1.62 matthew 276: } else {
277: $where =~ /\/(.*)$/;
278: $redirect_url .= $1;
279: }
280: $redirect_url .= '/';
1.78 sakharuk 281: &redirect_user($r,&mt('Entering Construction Space'),
1.62 matthew 282: $redirect_url);
283: return OK;
284: }
1.104 raeburn 285: if ($role eq 'dc') {
1.108 raeburn 286: my $redirect_url = '/adm/menu/';
287: &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
1.104 raeburn 288: $redirect_url);
1.108 raeburn 289: return OK;
1.104 raeburn 290: }
1.55 albertel 291: }
292: }
1.6 www 293: }
1.40 matthew 294: }
1.44 www 295:
1.10 www 296:
1.6 www 297: # =============================================================== No Roles Init
1.10 www 298:
1.73 www 299: &Apache::loncommon::content_type($r,'text/html');
1.30 albertel 300: &Apache::loncommon::no_cache($r);
1.10 www 301: $r->send_http_header;
302: return OK if $r->header_only;
303:
1.52 www 304: my $swinfo=&Apache::lonmenu::rawconfig();
1.41 www 305: my $bodytag=&Apache::loncommon::bodytag('User Roles');
1.94 albertel 306: my $helptag='<table><tr><td>'.&Apache::loncommon::help_open_menu('','General Intro','General_Intro','User Roles',1,undef,undef,undef,undef,,&mt("Click here for help")).'</td></td></tr></table>';
1.10 www 307: $r->print(<<ENDHEADER);
308: <html>
309: <head>
310: <title>LON-CAPA User Roles</title>
1.41 www 311: </head>
312: $bodytag
1.45 www 313: $helptag<br />
1.26 www 314: <script>
315: $swinfo
316: window.focus();
317: </script>
1.10 www 318: ENDHEADER
1.6 www 319:
1.2 www 320: # ------------------------------------------ Get Error Message from Environment
321:
1.118 albertel 322: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
323: if ($env{'user.error.msg'}) {
1.55 albertel 324: $r->log_reason(
1.118 albertel 325: "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
1.12 www 326: }
1.1 harris41 327:
1.61 www 328: # ------------------------------------------------- Can this user re-init, etc?
1.6 www 329:
1.118 albertel 330: my $advanced=$env{'user.adv'};
1.61 www 331: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
1.118 albertel 332: my $tryagain=$env{'form.tryagain'};
1.6 www 333:
1.2 www 334: # -------------------------------------------------------- Generate Page Output
1.6 www 335: # --------------------------------------------------------------- Error Header?
1.2 www 336: if ($error) {
337: $r->print("<h1>LON-CAPA Access Control</h1>");
1.4 www 338: $r->print("<hr><pre>Access : ".
339: Apache::lonnet::plaintext($priv)."\n");
1.115 albertel 340: $r->print("Resource: ".&Apache::lonenc::check_encrypt($fn)."\n");
1.4 www 341: $r->print("Action : $msg\n</pre><hr>");
1.2 www 342: } else {
1.118 albertel 343: if ($env{'user.error.msg'}) {
1.25 www 344: $r->print(
1.72 www 345: '<h3><font color=red>'.
346: &mt('You need to choose another user role or enter a specific course for this function').'</font></h3>');
1.25 www 347: }
1.2 www 348: }
1.6 www 349: # -------------------------------------------------------- Choice or no choice?
1.2 www 350: if ($nochoose) {
1.6 www 351: if ($advanced) {
1.72 www 352: $r->print("<h2>".&mt('Assigned User Roles')."</h2>\n");
1.6 www 353: } else {
1.72 www 354: $r->print("<h2>".&mt('Sorry ...')."</h2>\n".
355: &mt('This resource might be part of'));
1.118 albertel 356: if ($env{'request.course.id'}) {
1.72 www 357: $r->print(&mt(' another'));
1.55 albertel 358: } else {
1.72 www 359: $r->print(&mt(' a certain'));
1.55 albertel 360: }
1.72 www 361: $r->print(&mt(' course.').'</body></html>');
1.55 albertel 362: return OK;
1.6 www 363: }
364: } else {
365: if ($advanced) {
1.72 www 366: $r->print(&mt("Your home server is ").
1.55 albertel 367: $Apache::lonnet::hostname{&Apache::lonnet::homeserver
1.118 albertel 368: ($env{'user.name'},$env{'user.domain'})}.
1.55 albertel 369: "<br />\n");
1.72 www 370: $r->print(&mt(
371: "Author and Co-Author roles may not be available on servers other than your home server."));
1.17 www 372: }
1.18 www 373: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
374: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
1.6 www 375: }
1.84 www 376: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
1.116 albertel 377: $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
378: $r->print('<input type="hidden" name="selectrole" value="1" />');
1.6 www 379: }
1.118 albertel 380: if ($env{'user.adv'}) {
1.63 www 381: $r->print(
1.116 albertel 382: '<br /><label>'.&mt('Show all roles').': <input type="checkbox" name="showall"');
1.118 albertel 383: if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
1.116 albertel 384: $r->print(' /></label><input type="submit" value="'.&mt('Display').'" />');
1.63 www 385: }
1.4 www 386:
1.75 albertel 387: my (%roletext,%sortrole,%roleclass);
1.84 www 388: my $countactive=0;
389: my $inrole=0;
390: my $possiblerole='';
1.118 albertel 391: foreach $envkey (sort keys %env) {
1.35 matthew 392: my $button = 1;
1.49 www 393: my $switchserver='';
1.75 albertel 394: my $roletext;
395: my $sortkey;
1.2 www 396: if ($envkey=~/^user\.role\./) {
1.102 raeburn 397: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
398: &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
1.46 matthew 399: next if (!defined($role) || $role eq '');
1.102 raeburn 400: $tremark='';
401: $tpstart=' ';
402: $tpend=' ';
403: $tfont='#000000';
1.4 www 404: if ($tstart) {
1.74 www 405: $tpstart=&Apache::lonlocal::locallocaltime($tstart);
1.4 www 406: }
407: if ($tend) {
1.74 www 408: $tpend=&Apache::lonlocal::locallocaltime($tend);
1.4 www 409: }
1.118 albertel 410: if ($env{'request.role'} eq $trolecode) {
1.6 www 411: $tstatus='selected';
412: }
1.4 www 413: my $tbg;
1.35 matthew 414: if (($tstatus eq 'is') || ($tstatus eq 'selected') ||
1.118 albertel 415: ($env{'form.showall'})) {
1.35 matthew 416: if ($tstatus eq 'is') {
417: $tbg='#77FF77';
1.47 www 418: $tfont='#003300';
1.84 www 419: $possiblerole=$trolecode;
420: $countactive++;
1.35 matthew 421: } elsif ($tstatus eq 'future') {
422: $tbg='#FFFF77';
1.49 www 423: $button=0;
1.35 matthew 424: } elsif ($tstatus eq 'will') {
425: $tbg='#FFAA77';
1.72 www 426: $tremark.=&mt('Active at next login. ');
1.35 matthew 427: } elsif ($tstatus eq 'expired') {
428: $tbg='#FF7777';
1.47 www 429: $tfont='#330000';
1.49 www 430: $button=0;
1.35 matthew 431: } elsif ($tstatus eq 'will_not') {
432: $tbg='#AAFF77';
1.72 www 433: $tremark.=&mt('Expired after logout. ');
1.35 matthew 434: } elsif ($tstatus eq 'selected') {
435: $tbg='#11CC55';
1.47 www 436: $tfont='#002200';
1.84 www 437: $inrole=1;
1.86 albertel 438: $countactive++;
1.72 www 439: $tremark.=&mt('Currently selected. ');
1.35 matthew 440: }
441: my $trole;
442: if ($role =~ /^cr\//) {
443: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
1.72 www 444: $tremark.='<br>'.&mt('Defined by ').$rauthor.
445: &mt(' at ').$rdomain.'.';
1.35 matthew 446: $trole=$rrole;
1.8 www 447: } else {
1.35 matthew 448: $trole=Apache::lonnet::plaintext($role);
449: }
450: my $ttype;
451: my $twhere;
452: my ($tdom,$trest,$tsection)=
453: split(/\//,Apache::lonnet::declutter($where));
454: # First, Co-Authorship roles
455: if ($role eq 'ca') {
1.39 stredwic 456: my $home = &Apache::lonnet::homeserver($trest,$tdom);
1.83 albertel 457: my $allowed=0;
458: my @ids=&Apache::lonnet::current_machine_ids();
459: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
460: if (!$allowed) {
1.49 www 461: $button=0;
1.51 www 462: $switchserver=&Apache::lonnet::escape('http://'.
463: $Apache::lonnet::hostname{$home}.
1.118 albertel 464: '/adm/login?domain='.$env{'user.domain'}.
465: '&username='.$env{'user.name'}.
1.97 albertel 466: '&firsturl=/priv/'.$trest.'/');
1.49 www 467: }
1.35 matthew 468: #next if ($home eq 'no_host');
469: $home = $Apache::lonnet::hostname{$home};
1.78 sakharuk 470: $ttype='Construction Space';
1.72 www 471: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
472: ': '.$tdom.'<br />'.
473: ' '.&mt('Server').': '.$home;
1.118 albertel 474: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1.82 www 475: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
1.75 albertel 476: $sortkey=$role."$trest:$tdom";
1.35 matthew 477: } elsif ($role eq 'au') {
478: # Authors
479: my $home = &Apache::lonnet::homeserver
1.118 albertel 480: ($env{'user.name'},$env{'user.domain'});
1.83 albertel 481: my $allowed=0;
482: my @ids=&Apache::lonnet::current_machine_ids();
483: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
484: if (!$allowed) {
1.49 www 485: $button=0;
1.51 www 486: $switchserver=&Apache::lonnet::escape('http://'.
487: $Apache::lonnet::hostname{$home}.
1.118 albertel 488: '/adm/login?domain='.$env{'user.domain'}.
489: '&username='.$env{'user.name'}.
490: '&firsturl=/priv/'.$env{'user.name'}.'/');
1.49 www 491: }
1.35 matthew 492: #next if ($home eq 'no_host');
493: $home = $Apache::lonnet::hostname{$home};
1.78 sakharuk 494: $ttype='Construction Space';
1.72 www 495: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
496: ': '.$home;
1.118 albertel 497: $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
498: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
1.75 albertel 499: $sortkey=$role;
1.35 matthew 500: } elsif ($trest) {
1.78 sakharuk 501: $ttype='Course';
1.35 matthew 502: if ($tsection) {
1.72 www 503: $ttype.='<br>'.&mt('Section/Group').': '.$tsection;
1.37 albertel 504: }
1.35 matthew 505: my $tcourseid=$tdom.'_'.$trest;
1.118 albertel 506: if ($env{'course.'.$tcourseid.'.description'}) {
507: $twhere=$env{'course.'.$tcourseid.'.description'};
1.80 albertel 508: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1.72 www 509: unless ($twhere eq &mt('Currently not available')) {
1.55 albertel 510: $twhere.=' <font size="-2">'.
1.72 www 511: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
1.49 www 512: '</font>';
1.55 albertel 513: }
1.8 www 514: } else {
1.105 raeburn 515: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1.35 matthew 516: if (%newhash) {
1.80 albertel 517: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
1.77 albertel 518: "\0".$envkey;
1.49 www 519: $twhere=$newhash{'description'}.
520: ' <font size="-2">'.
1.72 www 521: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
1.49 www 522: '</font>';
1.35 matthew 523: } else {
1.72 www 524: $twhere=&mt('Currently not available');
1.118 albertel 525: $env{'course.'.$tcourseid.'.description'}=$twhere;
1.80 albertel 526: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1.35 matthew 527: }
1.8 www 528: }
1.72 www 529: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
1.35 matthew 530: } elsif ($tdom) {
1.78 sakharuk 531: $ttype='Domain';
1.35 matthew 532: $twhere=$tdom;
1.75 albertel 533: $sortkey=$role.$twhere;
1.35 matthew 534: } else {
1.78 sakharuk 535: $ttype='System';
1.72 www 536: $twhere=&mt('system wide');
1.75 albertel 537: $sortkey=$role.$twhere;
1.13 www 538: }
1.35 matthew 539:
1.110 raeburn 540: $roletext.=&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$ttype,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver);
1.75 albertel 541: $roletext{$envkey}=$roletext;
542: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
543: $sortrole{$sortkey}=$envkey;
544: $roleclass{$envkey}=$ttype;
1.55 albertel 545: }
1.4 www 546: }
1.75 albertel 547: }
1.84 www 548: # No active roles
549: if ($countactive==0) {
550: if ($inrole) {
551: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
552: } else {
553: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
554: }
555: $r->print('</form></body></html>');
556: return OK;
557: # Is there only one choice?
1.118 albertel 558: } elsif (($countactive==1) && ($env{'request.role'} eq 'cm')) {
1.84 www 559: $r->print('<h3>'.&mt('Please stand by.').'</h3>'.
560: '<input type="hidden" name="'.$possiblerole.'" value="1" />');
561: $r->print("</form>\n");
562: $r->rflush();
563: $r->print('<script>document.forms.rolechoice.submit();</script>');
564: $r->print('</body></html>');
565: return OK;
566: }
567: # More than one possible role
568: # ----------------------------------------------------------------------- Table
569: unless (($advanced) || ($nochoose)) {
570: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
571: }
572: $r->print('<br /><table><tr>');
573: unless ($nochoose) { $r->print('<th> </th>'); }
574: $r->print('<th>'.&mt('User Role').'</th><th colspan=2>'.&mt('Extent').
575: '</th><th>'.&mt('Start').'</th><th>'.&mt('End').'</th><th>'.
1.99 www 576: &mt('Remarks and Calendar Announcements').'</th></tr>'."\n");
1.76 albertel 577: my $doheaders=-1;
1.78 sakharuk 578: foreach my $type ('Construction Space','Course','Domain','System') {
1.76 albertel 579: my $haverole=0;
1.75 albertel 580: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
581: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
1.76 albertel 582: $haverole=1;
1.75 albertel 583: }
1.76 albertel 584: }
585: if ($haverole) { $doheaders++; }
586: }
1.111 albertel 587:
1.118 albertel 588: if ($env{'environment.recentroles'}) {
1.111 albertel 589: my %recent_roles =
1.118 albertel 590: &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
1.111 albertel 591: my $output='';
592: foreach (sort(keys(%recent_roles))) {
593: if (defined($roletext{'user.role.'.$_})) {
594: $output.=$roletext{'user.role.'.$_};
1.113 raeburn 595: } elsif ($numdc > 0) {
596: unless ($_ =~/^error\:/) {
597: $output.=&display_cc_role('user.role.'.$_);
598: }
599: }
1.111 albertel 600: }
601: if ($output) {
602: $r->print("<tr bgcolor='#BBffBB'><td align='center' colspan='7'>".
603: &mt('Recent Roles')."</td>");
604: $r->print($output);
605: $r->print("</tr>");
1.114 raeburn 606: $doheaders ++;
1.111 albertel 607: }
608: }
609:
1.104 raeburn 610: if ($numdc > 0) {
1.112 raeburn 611: $r->print(&coursepick_jscript());
612: $r->print(&Apache::loncommon::coursebrowser_javascript());
1.108 raeburn 613: }
614: foreach my $type ('Construction Space','Course','Domain','System') {
615: my $output;
616: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
617: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
618: $output.=$roletext{$sortrole{$which}};
619: if ($sortrole{$which} =~ m-dc\./(\w+)/-) {
620: if ($dcroles{$1}) {
621: $output .= &allcourses_row($1);
1.104 raeburn 622: }
623: }
1.76 albertel 624: }
1.108 raeburn 625: }
626: if ($output) {
627: if ($doheaders > 0) {
628: $r->print("<tr bgcolor='#BBffBB'>".
1.112 raeburn 629: "<td align='center' colspan='7'>".&mt($type)."</td></tr>");
1.76 albertel 630: }
1.108 raeburn 631: $r->print($output);
632: }
1.4 www 633: }
1.14 www 634: my $tremark='';
1.47 www 635: my $tfont='#003300';
1.118 albertel 636: if ($env{'request.role'} eq 'cm') {
1.19 www 637: $r->print('<tr bgcolor="#11CC55">');
1.72 www 638: $tremark=&mt('Currently selected. ');
1.47 www 639: $tfont='#002200';
1.14 www 640: } else {
641: $r->print('<tr bgcolor="#77FF77">');
642: }
643: unless ($nochoose) {
1.118 albertel 644: if ($env{'request.role'} ne 'cm') {
1.72 www 645: $r->print('<td><input type=submit value="'.
646: &mt('Select').'" name="cm"></td>');
1.55 albertel 647: } else {
648: $r->print('<td> </td>');
649: }
1.14 www 650: }
1.72 www 651: $r->print('<td colspan=5><font color="'.$tfont.'">'.&mt('No role specified').
1.47 www 652: '</font></td><td><font color="'.$tfont.'">'.$tremark.
653: ' </font></td></tr>'."\n");
1.4 www 654:
655: $r->print('</table>');
656: unless ($nochoose) {
657: $r->print("</form>\n");
658: }
1.22 harris41 659: # ------------------------------------------------------------ Privileges Info
1.118 albertel 660: if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
1.55 albertel 661: $r->print('<hr><h2>Current Privileges</h2>');
1.4 www 662:
1.118 albertel 663: foreach $envkey (sort keys %env) {
664: if ($envkey=~/^user\.priv\.$env{'request.role'}\./) {
1.55 albertel 665: my $where=$envkey;
1.118 albertel 666: $where=~s/^user\.priv\.$env{'request.role'}\.//;
1.55 albertel 667: my $ttype;
668: my $twhere;
669: my ($tdom,$trest,$tsec)=
670: split(/\//,Apache::lonnet::declutter($where));
671: if ($trest) {
1.118 albertel 672: if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
1.55 albertel 673: $ttype='Construction Space';
674: $twhere='User: '.$trest.', Domain: '.$tdom;
675: } else {
676: $ttype='Course';
1.118 albertel 677: $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
1.55 albertel 678: if ($tsec) {
679: $twhere.=' (Section/Group: '.$tsec.')';
680: }
681: }
682: } elsif ($tdom) {
683: $ttype='Domain';
684: $twhere=$tdom;
685: } else {
686: $ttype='System';
687: $twhere='/';
688: }
689: $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
1.118 albertel 690: foreach (sort split(/:/,$env{$envkey})) {
1.55 albertel 691: if ($_) {
692: my ($prv,$restr)=split(/\&/,$_);
693: my $trestr='';
694: if ($restr ne 'F') {
695: my $i;
696: $trestr.=' (';
697: for ($i=0;$i<length($restr);$i++) {
698: $trestr.=
699: Apache::lonnet::plaintext(substr($restr,$i,1));
700: if ($i<length($restr)-1) { $trestr.=', '; }
701: }
702: $trestr.=')';
703: }
704: $r->print('<li>'.
705: Apache::lonnet::plaintext($prv).$trestr.
706: '</li>');
707: }
708: }
709: $r->print('</ul>');
710: }
711: }
1.4 www 712: }
1.66 www 713: $r->print(&Apache::lonnet::getannounce());
1.65 www 714: if ($advanced) {
715: $r->print('<p><small><i>This is LON-CAPA '.
1.85 www 716: $r->dir_config('lonVersion').'</i><br />'.
717: '<a href="/adm/logout">'.&mt('Logout').'</a></small></p>');
1.65 www 718: }
1.1 harris41 719: $r->print("</body></html>\n");
720: return OK;
1.102 raeburn 721: }
722:
723: sub role_status {
724: my ($rolekey,$then,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
725: my @pwhere = ();
1.118 albertel 726: if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
1.102 raeburn 727: (undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
728: unless (!defined($$role) || $$role eq '') {
729: $$where=join('.',@pwhere);
730: $$trolecode=$$role.'.'.$$where;
1.118 albertel 731: ($$tstart,$$tend)=split(/\./,$env{$rolekey});
1.102 raeburn 732: $$tstatus='is';
1.105 raeburn 733: if ($$tstart && $$tstart>$then) {
734: $$tstatus='future';
735: if ($$tstart<$now) { $$tstatus='will'; }
1.102 raeburn 736: }
737: if ($$tend) {
738: if ($$tend<$then) {
739: $$tstatus='expired';
1.103 raeburn 740: } elsif ($$tend<$now) {
1.104 raeburn 741: $$tstatus='will_not';
1.102 raeburn 742: }
743: }
744: }
745: }
746: }
1.1 harris41 747:
1.110 raeburn 748: sub build_roletext {
749: my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$ttype,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver) = @_;
1.112 raeburn 750: my $roletext='<tr bgcolor="'.$tbg.'">';
1.110 raeburn 751: unless ($nochoose) {
752: if (!$button) {
753: if ($switchserver) {
754: $roletext.='<td><a href="/adm/logout?handover='.
755: $switchserver.'">'.&mt('Switch Server').'</a></td>';
756: } else {
757: $roletext.=('<td> </td>');
758: }
759: } elsif ($tstatus eq 'is') {
760: $roletext.=('<td><input type=submit value="'.
761: &mt('Select').'" name="'.
762: $trolecode.'"></td>');
763: } elsif ($tryagain) {
764: $roletext.=
765: '<td><input type=submit value="'.
766: &mt('Try Selecting Again').'" name="'.$trolecode.'"></td>';
767: } elsif ($advanced) {
768: $roletext.=
769: '<td><input type=submit value="'.
770: &mt('Re-Initialize').'" name="'.$trolecode.'"></td>';
771: } else {
772: $roletext.='<td> </td>';
773: }
774: }
775: $tremark.=&Apache::lonannounce::showday(time,1,
776: &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
777:
778:
779: $roletext.='<td><font color="'.$tfont.'">'.$trole.
780: '</font></td><td><font color="'.$tfont.'">'.$ttype.
781: '</font></td><td><font color="'.$tfont.'">'.$twhere.
782: '</font></td><td><font color="'.$tfont.'">'.$tpstart.
783: '</font></td><td><font color="'.$tfont.'">'.$tpend.
784: '</font></td><td><font color="'.$tfont.'">'.$tremark.
785: ' </font></td></tr>'."\n";
786: return $roletext;
787: }
788:
789: sub check_privs {
790: my ($cckey,$then,$now) = @_;
1.118 albertel 791: if ($env{$cckey}) {
1.110 raeburn 792: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
793: &role_status($cckey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
794: unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
795: &set_privileges($1,$2);
796: }
797: } else {
798: &set_privileges($1,$2);
799: }
800: }
801:
1.104 raeburn 802: sub check_fordc {
803: my ($dcroles,$then) = @_;
804: my $numdc = 0;
1.118 albertel 805: if ($env{'user.adv'}) {
806: foreach my $envkey (sort keys %env) {
1.104 raeburn 807: if ($envkey=~/^user\.role\.dc\.\/(\w+)\/$/) {
808: my $dcdom = $1;
809: my $livedc = 1;
1.118 albertel 810: my ($tstart,$tend)=split(/\./,$env{$envkey});
1.105 raeburn 811: if ($tstart && $tstart>$then) { $livedc = 0; }
812: if ($tend && $tend <$then) { $livedc = 0; }
1.104 raeburn 813: if ($livedc) {
814: $$dcroles{$dcdom} = $envkey;
1.105 raeburn 815: $numdc++;
1.104 raeburn 816: }
817: }
818: }
819: }
820: return $numdc;
821: }
822:
1.108 raeburn 823: sub courselink {
824: my ($dcdom) = @_;
1.109 raeburn 825: my $courseform=&Apache::loncommon::selectcourse_link
1.112 raeburn 826: ('rolechoice','dccourse_'.$dcdom,'dcdomain_'.$dcdom,'coursedesc_'.$dcdom,$dcdom);
1.109 raeburn 827: my $hiddenitems = '<input type="hidden" name="dcdomain_'.$dcdom.'" value="'.$dcdom.'" />'.
828: '<input type="hidden" name="origdom_'.$dcdom.'" value="'.$dcdom.'" />'.
829: '<input type="hidden" name="dccourse_'.$dcdom.'" value="" />'.
830: '<input type="hidden" name="coursedesc_'.$dcdom.'" value="" />';
1.112 raeburn 831: return $courseform.$hiddenitems;
1.109 raeburn 832: }
833:
834: sub coursepick_jscript {
1.104 raeburn 835: my $verify_script = <<"END";
836: <script>
1.108 raeburn 837: function verifyCoursePick(caller) {
838: var numbutton = getIndex(caller)
1.112 raeburn 839: var pickedCourse = document.rolechoice.elements[numbutton+4].value
840: var pickedDomain = document.rolechoice.elements[numbutton+2].value
841: if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1.104 raeburn 842: if (pickedCourse != '') {
1.108 raeburn 843: if (numbutton != -1) {
844: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
845: document.rolechoice.elements[numbutton+1].name = courseTarget
846: document.rolechoice.submit()
847: }
1.104 raeburn 848: }
849: else {
1.114 raeburn 850: alert("Please use the 'Select Course' link to open a separate pick course window where you may select the course you wish to enter.");
1.104 raeburn 851: }
852: }
853: else {
854: alert("You can only use this screen to select courses in the current domain")
855: }
856: }
1.109 raeburn 857: function getIndex(caller) {
1.108 raeburn 858: for (var i=0;i<document.rolechoice.elements.length;i++) {
1.109 raeburn 859: if (document.rolechoice.elements[i] == caller) {
1.108 raeburn 860: return i;
861: }
862: }
863: return -1;
864: }
1.104 raeburn 865: </script>
866: END
1.109 raeburn 867: return $verify_script;
1.104 raeburn 868: }
869:
1.109 raeburn 870: sub processpick {
871: my $dcdom = shift;
872: my $process_pick = <<"END";
873: <script>
874: function process_pick(dom) {
875: var numbutton = getIndex(dom)
876: var pickedCourse = opener.document.rolechoice.dccourse_$dcdom.value
877: var pickedDomain = opener.document.rolechoice.dcdomain_$dcdom.value
878: if (opener.document.rolechoice.dcdomain_$dcdom.value == opener.document.rolechoice.origdom_$dcdom.value) {
879: if (pickedCourse != '') {
880: if (numbutton != -1) {
881: var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
882: opener.document.rolechoice.elements[numbutton+1].name = courseTarget
883: opener.document.rolechoice.submit()
884: }
885: }
886: }
887: }
888:
889: function getIndex(dom) {
890: var callername = 'ccpick_'+dom
891: for (var i=0;i<opener.document.rolechoice.elements.length;i++) {
892: var elemname = opener.document.rolechoice.elements[i].name
893: if (elemname == callername) {
894: return i;
895: }
896: }
897: return -1;
898: }
899: </script>
900: END
901: return $process_pick;
902: }
1.108 raeburn 903:
1.113 raeburn 904: sub display_cc_role {
905: my $rolekey = shift;
906: my $roletext;
1.118 albertel 907: my $advanced = $env{'user.adv'};
908: my $tryagain = $env{'form.tryagain'};
1.113 raeburn 909: unless ($rolekey =~/^error\:/) {
910: if ($rolekey =~ m-^user\.role.cc\./(\w+)/(\w+)$-) {
911: my $tcourseid = $1.'_'.$2;
912: my $trolecode = 'cc./'.$1.'/'.$2;
913: my $trole = Apache::lonnet::plaintext('cc');
914: my $twhere;
915: my $tbg='#77FF77';
916: my $tfont='#003300';
917: my %newhash=&Apache::lonnet::coursedescription($tcourseid);
918: if (%newhash) {
919: $twhere=$newhash{'description'}.
920: ' <font size="-2">'.
921: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1,$tfont).
922: '</font>';
923: } else {
924: $twhere=&mt('Currently not available');
1.118 albertel 925: $env{'course.'.$tcourseid.'.description'}=$twhere;
1.110 raeburn 926: }
1.113 raeburn 927: $twhere.="<br />".&mt('Domain').":".$1;
928: $roletext = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$tfont,$trole,&mt('Course'),$twhere,'','','',1,'');
1.104 raeburn 929: }
930: }
1.113 raeburn 931: return $roletext;
1.104 raeburn 932: }
933:
1.108 raeburn 934: sub allcourses_row {
1.109 raeburn 935: my $dcdom = shift;
1.108 raeburn 936: my $ccrole = Apache::lonnet::plaintext('cc');
937: my $selectlink = &courselink($dcdom);
938: my $output = '<tr bgcolor="#77FF77">'.
939: '<td><input type="button" value="'.
1.109 raeburn 940: &mt('Select').'" name="ccpick_'.$dcdom.'"'.
1.108 raeburn 941: 'onClick="verifyCoursePick(this)">'.
942: '<input type="hidden" name="pick_'.$dcdom.'" value="1"></td>'.
943: '<td><font color="#002200">'.
944: $ccrole.'</font></td><td>'.&mt('Course').'</td>'.
945: '<td><font color="#002200">'.&mt('All courses').':<b> '.
946: $selectlink.'</b>'.
947: '<br />'.&mt('Domain').':'.$dcdom.'</font>'.
948: '<td colspan="4"><font color="#002200">'.
949: &mt('Course Coordinator access to all courses in domain').
950: ': <b>'.$dcdom.'</b></font></td></tr>'."\n";
951: return $output;
952: }
953:
1.104 raeburn 954: sub recent_filename {
955: my $area=shift;
956: return 'nohist_recent_'.&Apache::lonnet::escape($area);
957: }
958:
1.106 raeburn 959: sub set_privileges {
960: my ($dcdom,$pickedcourse) = @_;
961: my $area = '/'.$dcdom.'/'.$pickedcourse;
962: my $role = 'cc';
963: my $spec = $role.'.'.$area;
1.118 albertel 964: my $userroles = &Apache::lonnet::set_arearole($role,$area,'','',$dcdom,$env{'user.name'});
1.106 raeburn 965: my %ccrole = ();
966: &Apache::lonnet::standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
1.107 raeburn 967: my ($author,$adv)= &Apache::lonnet::set_userprivs(\$userroles,\%ccrole);
968: my @newprivs = split/\n/,$userroles;
1.106 raeburn 969: my %newccroles = ();
970: foreach (@newprivs) {
971: my ($key,$val) = split/=/,$_;
972: $newccroles{$key} = $val;
973: }
974: &Apache::lonnet::appenv(%newccroles);
1.118 albertel 975: &Apache::lonnet::log($env{'user.domain'},
976: $env{'user.name'},
977: $env{'user.home'},
1.106 raeburn 978: "Role ".$role);
979: &Apache::lonnet::appenv(
980: 'request.role' => $role,
981: 'request.role.domain' => $dcdom,
982: 'request.course.sec' => '');
983: my $tadv=0;
984: if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
985: &Apache::lonnet::appenv('request.role.adv' => $tadv);
986: }
987:
1.1 harris41 988: 1;
989: __END__
1.32 harris41 990:
991: =head1 NAME
992:
993: Apache::lonroles - User Roles Screen
994:
995: =head1 SYNOPSIS
996:
997: Invoked by /etc/httpd/conf/srm.conf:
998:
999: <Location /adm/roles>
1000: PerlAccessHandler Apache::lonacc
1001: SetHandler perl-script
1002: PerlHandler Apache::lonroles
1003: ErrorDocument 403 /adm/login
1004: ErrorDocument 500 /adm/errorhandler
1005: </Location>
1.64 bowersj2 1006:
1007: =head1 OVERVIEW
1008:
1009: =head2 Choosing Roles
1010:
1011: C<lonroles> is a handler that allows a user to switch roles in
1012: mid-session. LON-CAPA attempts to work with "No Role Specified", the
1013: default role that a user has before selecting a role, as widely as
1014: possible, but certain handlers for example need specification which
1015: course they should act on, etc. Both in this scenario, and when the
1016: handler determines via C<lonnet>'s C<&allowed> function that a certain
1017: action is not allowed, C<lonroles> is used as error handler. This
1018: allows the user to select another role which may have permission to do
1019: what they were trying to do. C<lonroles> can also be accessed via the
1020: B<CRS> button in the Remote Control.
1021:
1022: =begin latex
1023:
1024: \begin{figure}
1025: \begin{center}
1026: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
1027: \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
1028: \end{center}
1029: \end{figure}
1030:
1031: =end latex
1032:
1033: =head2 Role Initialization
1034:
1035: 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.
1.32 harris41 1036:
1037: =head1 INTRODUCTION
1038:
1039: This module enables a user to select what role he wishes to
1040: operate under (instructor, student, teaching assistant, course
1041: coordinator, etc). These roles are pre-established by the actions
1042: of upper-level users.
1043:
1044: This is part of the LearningOnline Network with CAPA project
1045: described at http://www.lon-capa.org.
1046:
1047: =head1 HANDLER SUBROUTINE
1048:
1049: This routine is called by Apache and mod_perl.
1050:
1051: =over 4
1052:
1053: =item *
1054:
1055: Roles Initialization (yes/no)
1056:
1057: =item *
1058:
1059: Get Error Message from Environment
1060:
1061: =item *
1062:
1063: Who is this?
1064:
1065: =item *
1066:
1067: Generate Page Output
1068:
1069: =item *
1070:
1071: Choice or no choice
1072:
1073: =item *
1074:
1075: Table
1076:
1077: =item *
1078:
1079: Privileges
1080:
1081: =back
1082:
1083: =cut
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