loncom/auth/lonroles.pm - view

File: [LON-CAPA] / loncom / auth / lonroles.pm
Revision 1.89: download - view: text, annotated - select for diffs
Sat May 8 14:12:16 2004 UTC (20 years, 2 months ago) by www
Branches: MAIN
CVS tags: HEAD

Continued work on key verification.

1: # The LearningOnline Network with CAPA 2: # User Roles Screen 3: # 4: # $Id: lonroles.pm,v 1.89 2004/05/08 14:12:16 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: ### 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::lonannounce; 40: use Apache::lonlocal; 41: 42: sub redirect_user { 43: my ($r,$title,$url,$msg) = @_; 44: $msg = $title if (! defined($msg)); 45: &Apache::loncommon::content_type($r,'text/html'); 46: &Apache::loncommon::no_cache($r); 47: $r->send_http_header; 48: my $swinfo=&Apache::lonmenu::rawconfig(); 49: my $bodytag=&Apache::loncommon::bodytag('Switching Role'); 50: $r->print (<<ENDREDIR); 51: <head><title>$title</title> 52: <meta HTTP-EQUIV="Refresh" CONTENT="1; url=$url"> 53: </head> 54: <html> 55: $bodytag 56: <script> 57: $swinfo 58: </script> 59: <h1>$msg</h1> 60: </body> 61: </html> 62: ENDREDIR 63: return; 64: } 65: 66: sub handler { 67: 68: my $r = shift; 69: 70: my $now=time; 71: my $then=$ENV{'user.login.time'}; 72: my $envkey; 73: 74: 75: # ================================================================== Roles Init 76: 77: if ($ENV{'form.selectrole'}) { 78: if ($ENV{'request.course.id'}) { 79: my %temp=('logout_'.$ENV{'request.course.id'} => time); 80: &Apache::lonnet::put('email_status',\%temp); 81: } 82: &Apache::lonnet::appenv("request.course.id" => '', 83: "request.course.fn" => '', 84: "request.course.uri" => '', 85: "request.course.sec" => '', 86: "request.role" => 'cm', 87: "request.role.adv" => $ENV{'user.adv'}, 88: "request.role.domain" => $ENV{'user.domain'}); 89: foreach $envkey (keys %ENV) { 90: next if ($envkey!~/^user\.role\./); 91: my (undef,undef,$role,@pwhere)=split(/\./,$envkey); 92: my $where=join('.',@pwhere); 93: my $trolecode=$role.'.'.$where; 94: if ($ENV{'form.'.$trolecode}) { 95: my ($tstart,$tend)=split(/\./,$ENV{$envkey}); 96: my $tstatus='is'; 97: if ($tstart) { 98: if ($tstart>$then) { 99: $tstatus='future'; 100: } 101: } 102: if ($tend) { 103: if ($tend<$then) { $tstatus='expired'; } 104: if ($tend<$now) { $tstatus='will_not'; } 105: } 106: if ($tstatus eq 'is') { 107: $where=~s/^\///; 108: my ($cdom,$cnum,$csec)=split(/\//,$where); 109: # check for keyed access 110: if (($role eq 'st') && 111: ($ENV{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) { 112: # who is key authority? 113: my $authdom=$cdom; 114: my $authnum=$cnum; 115: if ($ENV{'course.'.$cdom.'_'.$cnum.'.keyauth'}) { 116: ($authnum,$authdom)= 117: split(/\W/,$ENV{'course.'.$cdom.'_'.$cnum.'.keyauth'}); 118: } 119: # check with key authority 120: unless (&Apache::lonnet::validate_access_key( 121: $ENV{'environment.key.'.$cdom.'_'.$cnum}, 122: $authdom,$authnum)) { 123: # there is no valid key 124: if ($ENV{'form.newkey'}) { 125: # student attempts to register a new key 126: &Apache::loncommon::content_type($r,'text/html'); 127: &Apache::loncommon::no_cache($r); 128: $r->send_http_header; 129: my $swinfo=&Apache::lonmenu::rawconfig(); 130: my $bodytag=&Apache::loncommon::bodytag 131: ('Verifying Access Key to Unlock this Course'); 132: my $buttontext=&mt('Re-Enter Key'); 133: my $message=&mt('Key Verification Failed').'<br /><a href="/adm/logout">'. 134: &mt('Logout').'</a>'; 135: $r->print(<<ENDENTEREDKEY); 136: <head><title>Verifying Course Access Key</title> 137: </head> 138: <html> 139: $bodytag 140: <script> 141: $swinfo 142: </script> 143: <form method="post"> 144: <input type="hidden" name="selectrole" value="1" /> 145: <input type="hidden" name="$trolecode" value="1" /> 146: $message 147: <input type="submit" value="$buttontext" /> 148: </form> 149: </body></html> 150: ENDENTEREDKEY 151: return OK; 152: } else { 153: # print form to enter a new key 154: &Apache::loncommon::content_type($r,'text/html'); 155: &Apache::loncommon::no_cache($r); 156: $r->send_http_header; 157: my $swinfo=&Apache::lonmenu::rawconfig(); 158: my $bodytag=&Apache::loncommon::bodytag 159: ('Enter Access Key to Unlock this Course'); 160: $r->print(<<ENDENTERKEY); 161: <head><title>Entering Course Access Key</title> 162: </head> 163: <html> 164: $bodytag 165: <script> 166: $swinfo 167: </script> 168: <form method="post"> 169: <input type="hidden" name="selectrole" value="1" /> 170: <input type="hidden" name="$trolecode" value="1" /> 171: <input type="text" size="20" name="newkey" value="$ENV{'form.newkey'}" /> 172: <input type="submit" value="Enter key" /> 173: </form> 174: </body></html> 175: ENDENTERKEY 176: return OK; 177: } 178: } 179: } 180: &Apache::lonnet::log($ENV{'user.domain'}, 181: $ENV{'user.name'}, 182: $ENV{'user.home'}, 183: "Role ".$trolecode); 184: my $tadv=0; 185: if (($trolecode!~/^st/) && 186: ($trolecode!~/^ta/) && 187: ($trolecode!~/^cm/)) { $tadv=1; } 188: &Apache::lonnet::appenv( 189: 'request.role' => $trolecode, 190: 'request.role.adv' => $tadv, 191: 'request.role.domain' => $cdom, 192: 'request.course.sec' => $csec); 193: my $msg=&mt('Entering course ...'); 194: 195: if (($cnum) && ($role ne 'ca')) { 196: my ($furl,$ferr)= 197: &Apache::lonuserstate::readmap($cdom.'/'.$cnum); 198: if (($ENV{'form.orgurl'}) && 199: ($ENV{'form.orgurl'}!~/^\/adm\/flip/)) { 200: my $dest=$ENV{'form.orgurl'}; 201: if ( &Apache::lonnet::mod_perl_version() == 2 ) { 202: &Apache::lonnet::cleanenv(); 203: } 204: $r->internal_redirect($dest); 205: return OK; 206: } else { 207: unless ($ENV{'request.course.id'}) { 208: &Apache::lonnet::appenv( 209: "request.course.id" => $cdom.'_'.$cnum); 210: $furl='/adm/roles?tryagain=1'; 211: $msg= 212: '<h1><font color=red>'. 213: &mt('Could not initialize course at this time.'). 214: '</font></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr; 215: } 216: 217: # Check to see if the user is a CC entering a course 218: # for the first time 219: my (undef, undef, $role, $courseid) = split(/\./, $envkey); 220: if (substr($courseid, 0, 1) eq '/') { 221: $courseid = substr($courseid, 1); 222: } 223: $courseid =~ s/\//_/; 224: if ($role eq 'cc' && $ENV{'course.' . $courseid . 225: '.course.helper.not.run'}) { 226: $furl = "/adm/helper/course.initialization.helper"; 227: } 228: # 229: # Send the user to the course they selected 230: &redirect_user($r,&mt('Entering Course'), 231: $furl,$msg); 232: return OK; 233: } 234: } 235: # 236: # Send the user to the construction space they selected 237: if ($role =~ /^(au|ca)$/) { 238: my $redirect_url = '/priv/'; 239: if ($role eq 'au') { 240: $redirect_url.=$ENV{'user.name'}; 241: } else { 242: $where =~ /\/(.*)$/; 243: $redirect_url .= $1; 244: } 245: $redirect_url .= '/'; 246: &redirect_user($r,&mt('Entering Construction Space'), 247: $redirect_url); 248: return OK; 249: } 250: } 251: } 252: } 253: } 254: 255: 256: # =============================================================== No Roles Init 257: 258: &Apache::loncommon::content_type($r,'text/html'); 259: &Apache::loncommon::no_cache($r); 260: $r->send_http_header; 261: return OK if $r->header_only; 262: 263: my $swinfo=&Apache::lonmenu::rawconfig(); 264: my $bodytag=&Apache::loncommon::bodytag('User Roles'); 265: my $helptag='<table><tr><td>'.&Apache::loncommon::help_open_topic 266: ("General_Intro",&mt("Click here for help")).'</td><td>'. 267: &Apache::loncommon::help_open_faq(1,&mt('Click here for FAQ')).'</td><td>'. 268: &Apache::loncommon::help_open_bug('',&mt('Click here to report bugs')).'</td></tr></table>'; 269: $r->print(<<ENDHEADER); 270: <html> 271: <head> 272: <title>LON-CAPA User Roles</title> 273: </head> 274: $bodytag 275: $helptag<br /> 276: <script> 277: $swinfo 278: window.focus(); 279: </script> 280: ENDHEADER 281: 282: # ------------------------------------------ Get Error Message from Environment 283: 284: my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$ENV{'user.error.msg'}); 285: if ($ENV{'user.error.msg'}) { 286: $r->log_reason( 287: "$msg for $ENV{'user.name'} domain $ENV{'user.domain'} access $priv",$fn); 288: } 289: 290: # ------------------------------------------------- Can this user re-init, etc? 291: 292: my $advanced=$ENV{'user.adv'}; 293: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']); 294: my $tryagain=$ENV{'form.tryagain'}; 295: 296: # -------------------------------------------------------- Generate Page Output 297: # --------------------------------------------------------------- Error Header? 298: if ($error) { 299: $r->print("<h1>LON-CAPA Access Control</h1>"); 300: $r->print("<hr><pre>Access : ". 301: Apache::lonnet::plaintext($priv)."\n"); 302: $r->print("Resource: $fn\n"); 303: $r->print("Action : $msg\n</pre><hr>"); 304: } else { 305: if ($ENV{'user.error.msg'}) { 306: $r->print( 307: '<h3><font color=red>'. 308: &mt('You need to choose another user role or enter a specific course for this function').'</font></h3>'); 309: } 310: } 311: # -------------------------------------------------------- Choice or no choice? 312: if ($nochoose) { 313: if ($advanced) { 314: $r->print("<h2>".&mt('Assigned User Roles')."</h2>\n"); 315: } else { 316: $r->print("<h2>".&mt('Sorry ...')."</h2>\n". 317: &mt('This resource might be part of')); 318: if ($ENV{'request.course.id'}) { 319: $r->print(&mt(' another')); 320: } else { 321: $r->print(&mt(' a certain')); 322: } 323: $r->print(&mt(' course.').'</body></html>'); 324: return OK; 325: } 326: } else { 327: if ($advanced) { 328: $r->print(&mt("Your home server is "). 329: $Apache::lonnet::hostname{&Apache::lonnet::homeserver 330: ($ENV{'user.name'},$ENV{'user.domain'})}. 331: "<br />\n"); 332: $r->print(&mt( 333: "Author and Co-Author roles may not be available on servers other than your home server.")); 334: } 335: if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) { 336: $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'}; 337: } 338: $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">'); 339: $r->print('<input type=hidden name=orgurl value="'.$fn.'">'); 340: $r->print('<input type=hidden name=selectrole value=1>'); 341: } 342: if ($ENV{'user.adv'}) { 343: $r->print( 344: '<br />'.&mt('Show all roles').': <input type="checkbox" name="showall"'); 345: if ($ENV{'form.showall'}) { $r->print(' checked'); } 346: $r->print('><input type=submit value="'.&mt('Display').'">'); 347: } 348: 349: my (%roletext,%sortrole,%roleclass); 350: my $countactive=0; 351: my $inrole=0; 352: my $possiblerole=''; 353: foreach $envkey (sort keys %ENV) { 354: my $button = 1; 355: my $switchserver=''; 356: my $roletext; 357: my $sortkey; 358: if ($envkey=~/^user\.role\./) { 359: my (undef,undef,$role,@pwhere)=split(/\./,$envkey); 360: next if (!defined($role) || $role eq ''); 361: my $where=join('.',@pwhere); 362: my $trolecode=$role.'.'.$where; 363: my ($tstart,$tend)=split(/\./,$ENV{$envkey}); 364: my $tremark=''; 365: my $tstatus='is'; 366: my $tpstart=' '; 367: my $tpend=' '; 368: my $tfont='#000000'; 369: if ($tstart) { 370: if ($tstart>$then) { 371: $tstatus='future'; 372: if ($tstart<$now) { $tstatus='will'; } 373: } 374: $tpstart=&Apache::lonlocal::locallocaltime($tstart); 375: } 376: if ($tend) { 377: if ($tend<$then) { 378: $tstatus='expired'; 379: } elsif ($tend<$now) { 380: $tstatus='will_not'; 381: } 382: $tpend=&Apache::lonlocal::locallocaltime($tend); 383: } 384: if ($ENV{'request.role'} eq $trolecode) { 385: $tstatus='selected'; 386: } 387: my $tbg; 388: if (($tstatus eq 'is') || ($tstatus eq 'selected') || 389: ($ENV{'form.showall'})) { 390: if ($tstatus eq 'is') { 391: $tbg='#77FF77'; 392: $tfont='#003300'; 393: $possiblerole=$trolecode; 394: $countactive++; 395: } elsif ($tstatus eq 'future') { 396: $tbg='#FFFF77'; 397: $button=0; 398: } elsif ($tstatus eq 'will') { 399: $tbg='#FFAA77'; 400: $tremark.=&mt('Active at next login. '); 401: } elsif ($tstatus eq 'expired') { 402: $tbg='#FF7777'; 403: $tfont='#330000'; 404: $button=0; 405: } elsif ($tstatus eq 'will_not') { 406: $tbg='#AAFF77'; 407: $tremark.=&mt('Expired after logout. '); 408: } elsif ($tstatus eq 'selected') { 409: $tbg='#11CC55'; 410: $tfont='#002200'; 411: $inrole=1; 412: $countactive++; 413: $tremark.=&mt('Currently selected. '); 414: } 415: my $trole; 416: if ($role =~ /^cr\//) { 417: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role); 418: $tremark.='<br>'.&mt('Defined by ').$rauthor. 419: &mt(' at ').$rdomain.'.'; 420: $trole=$rrole; 421: } else { 422: $trole=Apache::lonnet::plaintext($role); 423: } 424: my $ttype; 425: my $twhere; 426: my ($tdom,$trest,$tsection)= 427: split(/\//,Apache::lonnet::declutter($where)); 428: # First, Co-Authorship roles 429: if ($role eq 'ca') { 430: my $home = &Apache::lonnet::homeserver($trest,$tdom); 431: my $allowed=0; 432: my @ids=&Apache::lonnet::current_machine_ids(); 433: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } } 434: if (!$allowed) { 435: $button=0; 436: $switchserver=&Apache::lonnet::escape('http://'. 437: $Apache::lonnet::hostname{$home}. 438: '/adm/login?domain='.$ENV{'user.domain'}. 439: '&username='.$ENV{'user.name'}. 440: '&firsturl=/priv/'.$trest); 441: } 442: #next if ($home eq 'no_host'); 443: $home = $Apache::lonnet::hostname{$home}; 444: $ttype='Construction Space'; 445: $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain'). 446: ': '.$tdom.'<br />'. 447: ' '.&mt('Server').': '.$home; 448: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca'; 449: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/'); 450: $sortkey=$role."$trest:$tdom"; 451: } elsif ($role eq 'au') { 452: # Authors 453: my $home = &Apache::lonnet::homeserver 454: ($ENV{'user.name'},$ENV{'user.domain'}); 455: my $allowed=0; 456: my @ids=&Apache::lonnet::current_machine_ids(); 457: foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } } 458: if (!$allowed) { 459: $button=0; 460: $switchserver=&Apache::lonnet::escape('http://'. 461: $Apache::lonnet::hostname{$home}. 462: '/adm/login?domain='.$ENV{'user.domain'}. 463: '&username='.$ENV{'user.name'}. 464: '&firsturl=/priv/'.$ENV{'user.name'}); 465: } 466: #next if ($home eq 'no_host'); 467: $home = $Apache::lonnet::hostname{$home}; 468: $ttype='Construction Space'; 469: $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server'). 470: ': '.$home; 471: $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca'; 472: $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$ENV{'user.name'}.'/'); 473: $sortkey=$role; 474: } elsif ($trest) { 475: $ttype='Course'; 476: if ($tsection) { 477: $ttype.='<br>'.&mt('Section/Group').': '.$tsection; 478: } 479: my $tcourseid=$tdom.'_'.$trest; 480: if ($ENV{'course.'.$tcourseid.'.description'}) { 481: $twhere=$ENV{'course.'.$tcourseid.'.description'}; 482: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey; 483: unless ($twhere eq &mt('Currently not available')) { 484: $twhere.=' <font size="-2">'. 485: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont). 486: '</font>'; 487: } 488: } else { 489: my %newhash=Apache::lonnet::coursedescription 490: ($tcourseid); 491: if (%newhash) { 492: $sortkey=$role."\0".$tdom."\0".$newhash{'description'}. 493: "\0".$envkey; 494: $twhere=$newhash{'description'}. 495: ' <font size="-2">'. 496: &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont). 497: '</font>'; 498: } else { 499: $twhere=&mt('Currently not available'); 500: $ENV{'course.'.$tcourseid.'.description'}=$twhere; 501: $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey; 502: } 503: } 504: if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; } 505: } elsif ($tdom) { 506: $ttype='Domain'; 507: $twhere=$tdom; 508: $sortkey=$role.$twhere; 509: } else { 510: $ttype='System'; 511: $twhere=&mt('system wide'); 512: $sortkey=$role.$twhere; 513: } 514: 515: $roletext.='<tr bgcolor='.$tbg.'>'; 516: unless ($nochoose) { 517: if (!$button) { 518: if ($switchserver) { 519: $roletext.='<td><a href="/adm/logout?handover='. 520: $switchserver.'">'.&mt('Switch Server').'</a></td>'; 521: } else { 522: $roletext.=('<td> </td>'); 523: } 524: } elsif ($tstatus eq 'is') { 525: $roletext.=('<td><input type=submit value="'. 526: &mt('Select').'" name="'. 527: $trolecode.'"></td>'); 528: } elsif ($tryagain) { 529: $roletext.= 530: '<td><input type=submit value="'. 531: &mt('Try Selecting Again').'" name="'.$trolecode.'"></td>'; 532: } elsif ($advanced) { 533: $roletext.= 534: '<td><input type=submit value="'. 535: &mt('Re-Initialize').'" name="'.$trolecode.'"></td>'; 536: } else { 537: $roletext.='<td> </td>'; 538: } 539: } 540: $tremark.=&Apache::lonannounce::showday(time,1, 541: &Apache::lonannounce::readcalendar($tdom.'_'.$trest)); 542: 543: $roletext.='<td><font color="'.$tfont.'">'.$trole. 544: '</font></td><td><font color="'.$tfont.'">'.$ttype. 545: '</font></td><td><font color="'.$tfont.'">'.$twhere. 546: '</font></td><td><font color="'.$tfont.'">'.$tpstart. 547: '</font></td><td><font color="'.$tfont.'">'.$tpend. 548: '</font></td><td><font color="'.$tfont.'">'.$tremark. 549: ' </font></td></tr>'."\n"; 550: $roletext{$envkey}=$roletext; 551: if (!$sortkey) {$sortkey=$twhere."\0".$envkey;} 552: $sortrole{$sortkey}=$envkey; 553: $roleclass{$envkey}=$ttype; 554: } 555: } 556: } 557: # No active roles 558: if ($countactive==0) { 559: if ($inrole) { 560: $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>'); 561: } else { 562: $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>'); 563: } 564: $r->print('</form></body></html>'); 565: return OK; 566: # Is there only one choice? 567: } elsif (($countactive==1) && ($ENV{'request.role'} eq 'cm')) { 568: $r->print('<h3>'.&mt('Please stand by.').'</h3>'. 569: '<input type="hidden" name="'.$possiblerole.'" value="1" />'); 570: $r->print("</form>\n"); 571: $r->rflush(); 572: $r->print('<script>document.forms.rolechoice.submit();</script>'); 573: $r->print('</body></html>'); 574: return OK; 575: } 576: # More than one possible role 577: # ----------------------------------------------------------------------- Table 578: unless (($advanced) || ($nochoose)) { 579: $r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n"); 580: } 581: $r->print('<br /><table><tr>'); 582: unless ($nochoose) { $r->print('<th> </th>'); } 583: $r->print('<th>'.&mt('User Role').'</th><th colspan=2>'.&mt('Extent'). 584: '</th><th>'.&mt('Start').'</th><th>'.&mt('End').'</th><th>'. 585: &mt('Remark').'</th></tr>'."\n"); 586: my $doheaders=-1; 587: foreach my $type ('Construction Space','Course','Domain','System') { 588: my $haverole=0; 589: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) { 590: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) { 591: $haverole=1; 592: } 593: } 594: if ($haverole) { $doheaders++; } 595: } 596: foreach my $type ('Construction Space','Course','Domain','System') { 597: my $output; 598: foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) { 599: if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) { 600: $output.=&mt($roletext{$sortrole{$which}}); 601: } 602: } 603: if ($output) { 604: if ($doheaders > 0) { 605: $r->print("<tr bgcolor='#BBffBB'>". 606: "<td align='center' colspan='7'>".&mt($type)."</td>"); 607: } 608: $r->print($output); 609: } 610: } 611: my $tremark=''; 612: my $tfont='#003300'; 613: if ($ENV{'request.role'} eq 'cm') { 614: $r->print('<tr bgcolor="#11CC55">'); 615: $tremark=&mt('Currently selected. '); 616: $tfont='#002200'; 617: } else { 618: $r->print('<tr bgcolor="#77FF77">'); 619: } 620: unless ($nochoose) { 621: if ($ENV{'request.role'} ne 'cm') { 622: $r->print('<td><input type=submit value="'. 623: &mt('Select').'" name="cm"></td>'); 624: } else { 625: $r->print('<td> </td>'); 626: } 627: } 628: $r->print('<td colspan=5><font color="'.$tfont.'">'.&mt('No role specified'). 629: '</font></td><td><font color="'.$tfont.'">'.$tremark. 630: ' </font></td></tr>'."\n"); 631: 632: $r->print('</table>'); 633: unless ($nochoose) { 634: $r->print("</form>\n"); 635: } 636: # ------------------------------------------------------------ Privileges Info 637: if (($advanced) && (($ENV{'user.error.msg'}) || ($error))) { 638: $r->print('<hr><h2>Current Privileges</h2>'); 639: 640: foreach $envkey (sort keys %ENV) { 641: if ($envkey=~/^user\.priv\.$ENV{'request.role'}\./) { 642: my $where=$envkey; 643: $where=~s/^user\.priv\.$ENV{'request.role'}\.//; 644: my $ttype; 645: my $twhere; 646: my ($tdom,$trest,$tsec)= 647: split(/\//,Apache::lonnet::declutter($where)); 648: if ($trest) { 649: if ($ENV{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') { 650: $ttype='Construction Space'; 651: $twhere='User: '.$trest.', Domain: '.$tdom; 652: } else { 653: $ttype='Course'; 654: $twhere=$ENV{'course.'.$tdom.'_'.$trest.'.description'}; 655: if ($tsec) { 656: $twhere.=' (Section/Group: '.$tsec.')'; 657: } 658: } 659: } elsif ($tdom) { 660: $ttype='Domain'; 661: $twhere=$tdom; 662: } else { 663: $ttype='System'; 664: $twhere='/'; 665: } 666: $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>'); 667: foreach (sort split(/:/,$ENV{$envkey})) { 668: if ($_) { 669: my ($prv,$restr)=split(/\&/,$_); 670: my $trestr=''; 671: if ($restr ne 'F') { 672: my $i; 673: $trestr.=' ('; 674: for ($i=0;$i<length($restr);$i++) { 675: $trestr.= 676: Apache::lonnet::plaintext(substr($restr,$i,1)); 677: if ($i<length($restr)-1) { $trestr.=', '; } 678: } 679: $trestr.=')'; 680: } 681: $r->print('<li>'. 682: Apache::lonnet::plaintext($prv).$trestr. 683: '</li>'); 684: } 685: } 686: $r->print('</ul>'); 687: } 688: } 689: } 690: $r->print(&Apache::lonnet::getannounce()); 691: if ($advanced) { 692: $r->print('<p><small><i>This is LON-CAPA '. 693: $r->dir_config('lonVersion').'</i><br />'. 694: '<a href="/adm/logout">'.&mt('Logout').'</a></small></p>'); 695: } 696: $r->print("</body></html>\n"); 697: return OK; 698: } 699: 700: 1; 701: __END__ 702: 703: =head1 NAME 704: 705: Apache::lonroles - User Roles Screen 706: 707: =head1 SYNOPSIS 708: 709: Invoked by /etc/httpd/conf/srm.conf: 710: 711: <Location /adm/roles> 712: PerlAccessHandler Apache::lonacc 713: SetHandler perl-script 714: PerlHandler Apache::lonroles 715: ErrorDocument 403 /adm/login 716: ErrorDocument 500 /adm/errorhandler 717: </Location> 718: 719: =head1 OVERVIEW 720: 721: =head2 Choosing Roles 722: 723: C<lonroles> is a handler that allows a user to switch roles in 724: mid-session. LON-CAPA attempts to work with "No Role Specified", the 725: default role that a user has before selecting a role, as widely as 726: possible, but certain handlers for example need specification which 727: course they should act on, etc. Both in this scenario, and when the 728: handler determines via C<lonnet>'s C<&allowed> function that a certain 729: action is not allowed, C<lonroles> is used as error handler. This 730: allows the user to select another role which may have permission to do 731: what they were trying to do. C<lonroles> can also be accessed via the 732: B<CRS> button in the Remote Control. 733: 734: =begin latex 735: 736: \begin{figure} 737: \begin{center} 738: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen} 739: \caption{\label{Sample_Roles_Screen}Sample Roles Screen} 740: \end{center} 741: \end{figure} 742: 743: =end latex 744: 745: =head2 Role Initialization 746: 747: 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. 748: 749: =head1 INTRODUCTION 750: 751: This module enables a user to select what role he wishes to 752: operate under (instructor, student, teaching assistant, course 753: coordinator, etc). These roles are pre-established by the actions 754: of upper-level users. 755: 756: This is part of the LearningOnline Network with CAPA project 757: described at http://www.lon-capa.org. 758: 759: =head1 HANDLER SUBROUTINE 760: 761: This routine is called by Apache and mod_perl. 762: 763: =over 4 764: 765: =item * 766: 767: Roles Initialization (yes/no) 768: 769: =item * 770: 771: Get Error Message from Environment 772: 773: =item * 774: 775: Who is this? 776: 777: =item * 778: 779: Generate Page Output 780: 781: =item * 782: 783: Choice or no choice 784: 785: =item * 786: 787: Table 788: 789: =item * 790: 791: Privileges 792: 793: =back 794: 795: =cut