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Diff for /loncom/auth/lonroles.pm between versions 1.61 and 1.70

version 1.61, 2003/06/18 15:05:32 version 1.70, 2003/09/17 17:50:49
Line 52  use Apache::lonmenu; Line 52  use Apache::lonmenu;
 use Apache::loncommon;  use Apache::loncommon;
 use Apache::lonannounce;  use Apache::lonannounce;
   
   sub redirect_user {
       my ($r,$title,$url,$msg) = @_;
       $msg = $title if (! defined($msg));
       $r->content_type('text/html');
       &Apache::loncommon::no_cache($r);
       $r->send_http_header;
       my $swinfo=&Apache::lonmenu::rawconfig();
       my $bodytag=&Apache::loncommon::bodytag('Switching Role');
       $r->print (<<ENDREDIR);
   <head><title>$title</title>
   <meta HTTP-EQUIV="Refresh" CONTENT="1; url=$url">
   </head>
   <html>
   $bodytag
   <script>
   $swinfo
   </script>
   <h1>$msg</h1>
   </body>
   </html>
   ENDREDIR
       return;
   }
   
 sub handler {  sub handler {
   
     my $r = shift;      my $r = shift;
Line 141  ENDENTERKEY Line 165  ENDENTERKEY
    'request.role.domain' => $cdom,     'request.role.domain' => $cdom,
    'request.course.sec'  => $csec);     'request.course.sec'  => $csec);
     my $msg='Entering course ...';      my $msg='Entering course ...';
   
     if (($cnum) && ($role ne 'ca')) {      if (($cnum) && ($role ne 'ca')) {
  my ($furl,$ferr)=   my ($furl,$ferr)=
     &Apache::lonuserstate::readmap($cdom.'/'.$cnum);      &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
  if (($ENV{'form.orgurl'}) &&    if (($ENV{'form.orgurl'}) && 
     ($ENV{'form.orgurl'}!~/^\/adm\/flip/)) {      ($ENV{'form.orgurl'}!~/^\/adm\/flip/)) {
     $r->internal_redirect($ENV{'form.orgurl'});      my $dest=$ENV{'form.orgurl'};
       if ( $Apache::lonnet::mod_perl_version() == 2 ) {
    &Apache::lonnet::cleanenv();
       }
       $r->internal_redirect($dest);
     return OK;      return OK;
  } else {   } else {
     unless ($ENV{'request.course.id'}) {      unless ($ENV{'request.course.id'}) {
Line 154  ENDENTERKEY Line 183  ENDENTERKEY
       "request.course.id"  => $cdom.'_'.$cnum);        "request.course.id"  => $cdom.'_'.$cnum);
  $furl='/adm/roles?tryagain=1';   $furl='/adm/roles?tryagain=1';
  $msg=   $msg=
  '<h1><font color=red>Could not initialize course at this time.</font></h1><h3>Please try again.</h3>';   '<h1><font color=red>Could not initialize course at this time.</font></h1><h3>Please try again.</h3>'.$ferr;
     }      }
   
     # Check to see if the user is a CC entering a course       # Check to see if the user is a CC entering a course 
Line 168  ENDENTERKEY Line 197  ENDENTERKEY
   '.course.helper.not.run'}) {    '.course.helper.not.run'}) {
  $furl = "/adm/helper/course.initialization.helper";   $furl = "/adm/helper/course.initialization.helper";
     }      }
                               #
     $r->content_type('text/html');                              # Send the user to the course they selected
     &Apache::loncommon::no_cache($r);                              &redirect_user($r,'Entering Course',
     $r->send_http_header;                                             $furl,$msg);
     my $swinfo=&Apache::lonmenu::rawconfig();  
     my $bodytag=&Apache::loncommon::bodytag('Switching Role');  
     print (<<ENDREDIR);  
 <head><title>Entering Course</title>  
 <meta HTTP-EQUIV="Refresh" CONTENT="1; url=$furl">  
 </head>  
 <html>  
 $bodytag  
 <script>  
 $swinfo  
 </script>  
 <h1>$msg</h1>  
 </body>  
 </html>  
 ENDREDIR  
                             return OK;                              return OK;
  }   }
     }      }
                       #
                       # Send the user to the construction space they selected
                       if ($role =~ /^(au|ca)$/) {
                           my $redirect_url = '/priv/';
                           if ($role eq 'au') {
                               $redirect_url.=$ENV{'user.name'};
                           } else {
                               $where =~ /\/(.*)$/;
                               $redirect_url .= $1;
                           }
                           $redirect_url .= '/';
                           &redirect_user($r,'Entering Construction Space',
                                          $redirect_url);
                           return OK;
                       }
  }   }
             }              }
         }          }
Line 281  ENDHEADER Line 310  ENDHEADER
         $r->print('<input type=hidden name=orgurl value="'.$fn.'">');          $r->print('<input type=hidden name=orgurl value="'.$fn.'">');
         $r->print('<input type=hidden name=selectrole value=1>');          $r->print('<input type=hidden name=selectrole value=1>');
     }      }
     $r->print('<br>Show all roles: <input type=checkbox name=showall');      if ($ENV{'user.adv'}) {
     if ($ENV{'form.showall'}) { $r->print(' checked'); }   $r->print(
     $r->print('><input type=submit value="Display"><br>');        '<br />Show all roles: <input type="checkbox" name="showall"');
    if ($ENV{'form.showall'}) { $r->print(' checked'); }
    $r->print('><input type=submit value="Display">');
       }
 # ----------------------------------------------------------------------- Table  # ----------------------------------------------------------------------- Table
     $r->print('<table><tr>');      $r->print('<br /><table><tr>');
     unless ($nochoose) { $r->print('<th>&nbsp;</th>'); }      unless ($nochoose) { $r->print('<th>&nbsp;</th>'); }
     $r->print('<th>User Role</th><th colspan=2>Extent</th>'.      $r->print('<th>User Role</th><th colspan=2>Extent</th>'.
       '<th>Start</th><th>End</th><th>Remark</th></tr>'."\n");        '<th>Start</th><th>End</th><th>Remark</th></tr>'."\n");
Line 542  ENDHEADER Line 574  ENDHEADER
     }      }
  }   }
     }      }
       $r->print(&Apache::lonnet::getannounce());
       if ($advanced) {
    $r->print('<p><small><i>This is LON-CAPA '.
     $r->dir_config('lonVersion').'</i></small></p>');
       }
     $r->print("</body></html>\n");      $r->print("</body></html>\n");
     return OK;      return OK;
 }   } 
Line 566  Invoked by /etc/httpd/conf/srm.conf: Line 602  Invoked by /etc/httpd/conf/srm.conf:
  ErrorDocument  500 /adm/errorhandler   ErrorDocument  500 /adm/errorhandler
  </Location>   </Location>
   
   =head1 OVERVIEW
   
   =head2 Choosing Roles
   
   C<lonroles> is a handler that allows a user to switch roles in
   mid-session. LON-CAPA attempts to work with "No Role Specified", the
   default role that a user has before selecting a role, as widely as
   possible, but certain handlers for example need specification which
   course they should act on, etc. Both in this scenario, and when the
   handler determines via C<lonnet>'s C<&allowed> function that a certain
   action is not allowed, C<lonroles> is used as error handler. This
   allows the user to select another role which may have permission to do
   what they were trying to do. C<lonroles> can also be accessed via the
   B<CRS> button in the Remote Control. 
   
   =begin latex
   
   \begin{figure}
   \begin{center}
   \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
     \caption{\label{Sample_Roles_Screen}Sample Roles Screen} 
   \end{center}
   \end{figure}
   
   =end latex
   
   =head2 Role Initialization
   
   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.
   
 =head1 INTRODUCTION  =head1 INTRODUCTION
   
 This module enables a user to select what role he wishes to  This module enables a user to select what role he wishes to
Removed from v.1.61  
changed lines
  Added in v.1.70

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