--- loncom/auth/lonroles.pm	2000/10/26 21:43:18	1.15
+++ loncom/auth/lonroles.pm	2003/02/13 18:11:26	1.52
@@ -1,12 +1,46 @@
 # The LearningOnline Network with CAPA
 # User Roles Screen
+#
+# $Id: lonroles.pm,v 1.52 2003/02/13 18:11:26 www Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
 # (Directory Indexer
 # (Login Screen
+# YEAR=1999
 # 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14 Gerd Kortemeyer)
 # 11/23 Gerd Kortemeyer)
+# YEAR=2000
 # 1/14,03/06,06/01,07/22,07/24,07/25,
-# 09/04,09/06,09/28,09/29,09/30,10/2,10/5,10/26 Gerd Kortemeyer
+# 09/04,09/06,09/28,09/29,09/30,10/2,10/5,10/26,10/28,
+# 12/08,12/28,
+# YEAR=2001
+# 01/15/01 Gerd Kortemeyer
+# 03/02,05/03,05/25,05/30,06/01,07/06,08/06 Gerd Kortemeyer
+# 12/29 Gerd Kortemeyer
 #
+###
+
 package Apache::lonroles;
 
 use strict;
@@ -14,6 +48,8 @@ use Apache::lonnet();
 use Apache::lonuserstate();
 use Apache::Constants qw(:common);
 use Apache::File();
+use Apache::lonmenu;
+use Apache::loncommon;
 
 sub handler {
 
@@ -27,14 +63,19 @@ sub handler {
 # ================================================================== Roles Init
 
     if ($ENV{'form.selectrole'}) {
-       &Apache::lonnet::appenv("request.course.id"  => '',
-                               "request.course.fn"  => '',
-                               "request.course.uri" => '',
-                               "request.course.sec" => '',
-                               "request.role" => 'cm'); 
+	if ($ENV{'request.course.id'}) {
+	    my %temp=('logout_'.$ENV{'request.course.id'} => time);
+	    &Apache::lonnet::put('email_status',\%temp);
+        }
+       &Apache::lonnet::appenv("request.course.id"   => '',
+                               "request.course.fn"   => '',
+                               "request.course.uri"  => '',
+                               "request.course.sec"  => '',
+                               "request.role"        => 'cm',
+                               "request.role.domain" => $ENV{'user.domain'}); 
         foreach $envkey (keys %ENV) {
-         if ($envkey=~/^user\.role\./) {
-	    my ($dum1,$dum2,$role,@pwhere)=split(/\./,$envkey);
+            next if ($envkey!~/^user\.role\./);
+	    my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
             my $where=join('.',@pwhere);
             my $trolecode=$role.'.'.$where;
             if ($ENV{'form.'.$trolecode}) {
@@ -47,38 +88,79 @@ sub handler {
                }
                if ($tend) {
                   if ($tend<$then) { $tstatus='expired'; }
-                  if ($tend>$now) { $tstatus='will_not'; }
+                  if ($tend<$now) { $tstatus='will_not'; }
                }
                if ($tstatus eq 'is') {
                    $where=~s/^\///;
                    my ($cdom,$cnum,$csec)=split(/\//,$where);
-                   &Apache::lonnet::appenv('request.role' => $trolecode,
-                                           'request.course.sec' => $csec);
-                   if ($cnum) {
-		      &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
-                      if ($ENV{'form.orgurl'}) {
+                   &Apache::lonnet::appenv('request.role'        => $trolecode,
+                                           'request.role.domain' => $cdom,
+                                           'request.course.sec'  => $csec);
+                   my $msg='Entering course ...';
+                   if (($cnum) && ($role ne 'ca')) {
+		      my ($furl,$ferr)=
+			  &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
+                      if (($ENV{'form.orgurl'}) && 
+                          ($ENV{'form.orgurl'}!~/^\/adm\/flip/)) {
                          $r->internal_redirect($ENV{'form.orgurl'});
                          return OK;
-		      }
+		     } else {
+                         unless ($ENV{'request.course.id'}) {
+                             &Apache::lonnet::appenv(
+				 "request.course.id"  => $cdom.'_'.$cnum);
+                             $furl='/adm/notfound.html';
+                             $msg=
+	 '<h1><font color=red>Could not initialize top-level map.</font></h1>';
+                          }
+	                 $r->content_type('text/html');
+                         &Apache::loncommon::no_cache($r);
+                         $r->send_http_header;
+                         my $swinfo=&Apache::lonmenu::rawconfig();
+                         my $bodytag=&Apache::loncommon::bodytag('Switching Role');
+                         print (<<ENDREDIR);
+<head><title>Entering Course</title>
+<meta HTTP-EQUIV="Refresh" CONTENT="1; url=$furl">
+</head>
+<html>
+$bodytag
+<script>
+$swinfo
+</script>
+<h1>$msg</h1>
+</body>
+</html>
+ENDREDIR
+                            return OK;
+                     }
                    }
                }
             } 
-	  }
         }
     }
-        
+
 
 # =============================================================== No Roles Init
 
     $r->content_type('text/html');
+    &Apache::loncommon::no_cache($r);
     $r->send_http_header;
     return OK if $r->header_only;
 
+    my $swinfo=&Apache::lonmenu::rawconfig();
+    my $bodytag=&Apache::loncommon::bodytag('User Roles');
+    my $helptag=&Apache::loncommon::help_open_topic
+     ("General_Intro","Click here for help");
     $r->print(<<ENDHEADER);
 <html>
 <head>
 <title>LON-CAPA User Roles</title>
-</head><body bgcolor="#FFFFFF">
+</head>
+$bodytag
+$helptag<br />
+<script>
+$swinfo
+window.focus();
+</script>
 ENDHEADER
 
 # ------------------------------------------ Get Error Message from Environment
@@ -94,15 +176,11 @@ ENDHEADER
     my $advanced=0;
     foreach $envkey (keys %ENV) {
         if ($envkey=~/^user\.role\./) {
-	    my ($dum1,$dum2,$role,@pwhere)=split(/\./,$envkey);
+	    my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
             if ($role ne 'st') { $advanced=1; }
         }
     }
 
-# ---------------------------------------------- Get cached course descriptions
-
-    my %cdes=Apache::lonnet::dump('nohist_coursedescriptions');
-
 # -------------------------------------------------------- Generate Page Output
 # --------------------------------------------------------------- Error Header?
     if ($error) {
@@ -112,7 +190,11 @@ ENDHEADER
         $r->print("Resource: $fn\n");
         $r->print("Action  : $msg\n</pre><hr>");
     } else {
-        $r->print("<h1>LON-CAPA User Roles</h1>");
+        if ($ENV{'user.error.msg'}) {
+	    $r->print(
+ '<h3><font color=red>You need to choose another user role or '.
+ 'enter a specific course for this function</font></h3>');
+	}
     }
 # -------------------------------------------------------- Choice or no choice?
     if ($nochoose) {
@@ -130,27 +212,37 @@ ENDHEADER
         } 
     } else {
         if ($advanced) {
-           $r->print("<h2>Select a User Role</h2>\n");
+           $r->print("Your home server is ".
+                     $Apache::lonnet::hostname{&Apache::lonnet::homeserver
+                     ($ENV{'user.name'},$ENV{'user.domain'})}.
+		     "<br />\n");
+           $r->print("Author and Co-Author roles may not be available on ".
+                     "servers other than your home server.");
         } else {
 	   $r->print("<h2>Enter a Course</h2>\n");
         }
+        if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
+    	    $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
+        }
         $r->print('<form method=post action="'.(($fn)?$fn:$r->uri).'">');
         $r->print('<input type=hidden name=orgurl value="'.$fn.'">');
         $r->print('<input type=hidden name=selectrole value=1>');
     }
+    $r->print('<br>Show all roles: <input type=checkbox name=showall');
+    if ($ENV{'form.showall'}) { $r->print(' checked'); }
+    $r->print('><input type=submit value="Display"><br>');
 # ----------------------------------------------------------------------- Table
     $r->print('<table><tr>');
     unless ($nochoose) { $r->print('<th>&nbsp;</th>'); }
-    if ($advanced) {
        $r->print('<th>User Role</th><th colspan=2>Extent</th>'.
                  '<th>Start</th><th>End</th><th>Remark</th></tr>'."\n");
-    } else {
-	$r->print('<th>Course</th></tr>'."\n");
-    }
 
     foreach $envkey (sort keys %ENV) {
+        my $button = 1;
+        my $switchserver='';
         if ($envkey=~/^user\.role\./) {
-	    my ($dum1,$dum2,$role,@pwhere)=split(/\./,$envkey);
+	    my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
+            next if (!defined($role) || $role eq '');
             my $where=join('.',@pwhere);
             my $trolecode=$role.'.'.$where;
             my ($tstart,$tend)=split(/\./,$ENV{$envkey});
@@ -158,94 +250,167 @@ ENDHEADER
             my $tstatus='is';
             my $tpstart='&nbsp;';
             my $tpend='&nbsp;';
+            my $tfont='#000000';
             if ($tstart) {
 		if ($tstart>$then) { 
-                   $tstatus='future';
-                   if ($tstart<$now) { $tstatus='will'; }
+                    $tstatus='future';
+                    if ($tstart<$now) { $tstatus='will'; }
                 }
                 $tpstart=localtime($tstart);
             }
             if ($tend) {
-                if ($tend<$then) { $tstatus='expired'; }
-                if ($tend>$now) { $tstatus='will_not'; }
+                if ($tend<$then) { 
+                    $tstatus='expired'; 
+                } elsif ($tend<$now) { 
+                    $tstatus='will_not'; 
+                }
                 $tpend=localtime($tend);
             }
             if ($ENV{'request.role'} eq $trolecode) {
 		$tstatus='selected';
             }
             my $tbg;
-            if ($tstatus eq 'is') {
-		$tbg='#77FF77';
-            } elsif ($tstatus eq 'future') {
-                $tbg='#FFFF77';
-            } elsif ($tstatus eq 'will') {
-                $tbg='#FFAA77';
-                $tremark.='Active at next login. ';
-            } elsif ($tstatus eq 'expired') {
-                $tbg='#FF7777';
-	    } elsif ($tstatus eq 'will_not') {
-                $tbg='#AAFF77';
-                $tremark.='Expired after logout. ';
-            } elsif ($tstatus eq 'selected') {
-                $tbg='#33FF33';
-                $tremark.='Currently selected. ';
-            }
-            my $trole;
-            if ($role =~ /^cr\//) {
-	       my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
-               $tremark.='<br>Defined by '.$rauthor.' at '.$rdomain.'.';
-               $trole=$rrole;
-	    } else {
-               $trole=Apache::lonnet::plaintext($role);
-            }
-            my $ttype;
-            my $twhere;
-            my ($tdom,$trest,$tsection)=
-               split(/\//,Apache::lonnet::declutter($where));
-            if ($trest) {
-		$ttype='Course';
-                if ($tsection) {
-                   $ttype.='<br>Section/Group: '.$tsection;
-                }     
-                my $tcourseid=$tdom.'/'.$trest;
-                if ($cdes{$tcourseid}) {
-		    $twhere=$cdes{$tcourseid};
+            if (($tstatus eq 'is') || ($tstatus eq 'selected') ||
+                ($ENV{'form.showall'})) {
+                if ($tstatus eq 'is') {
+                    $tbg='#77FF77';
+                    $tfont='#003300';
+                } elsif ($tstatus eq 'future') {
+                    $tbg='#FFFF77';
+                    $button=0;
+                } elsif ($tstatus eq 'will') {
+                    $tbg='#FFAA77';
+                    $tremark.='Active at next login. ';
+                } elsif ($tstatus eq 'expired') {
+                    $tbg='#FF7777';
+                    $tfont='#330000';
+                    $button=0;
+                } elsif ($tstatus eq 'will_not') {
+                    $tbg='#AAFF77';
+                    $tremark.='Expired after logout. ';
+                } elsif ($tstatus eq 'selected') {
+                    $tbg='#11CC55';
+                    $tfont='#002200';
+                    $tremark.='Currently selected. ';
+                }
+                my $trole;
+                if ($role =~ /^cr\//) {
+                    my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
+                    $tremark.='<br>Defined by '.$rauthor.' at '.$rdomain.'.';
+                    $trole=$rrole;
                 } else {
-                    my %newhash=Apache::lonnet::coursedescription($tcourseid);
-                    if (%newhash) {
-			$twhere=$newhash{'description'};
+                    $trole=Apache::lonnet::plaintext($role);
+                }
+                my $ttype;
+                my $twhere;
+                my ($tdom,$trest,$tsection)=
+                    split(/\//,Apache::lonnet::declutter($where));
+                # First, Co-Authorship roles
+                if ($role eq 'ca') {
+                    my $home = &Apache::lonnet::homeserver($trest,$tdom);
+                    if ($home ne $r->dir_config('lonHostID')) {
+			$button=0;
+                        $switchserver=&Apache::lonnet::escape('http://'.
+                         $Apache::lonnet::hostname{$home}.
+                         '/adm/login?domain='.$ENV{'user.domain'}.
+			  '&username='.$ENV{'user.name'}.
+                          '&firsturl=/priv/'.$trest);
+                    }
+                    #next if ($home eq 'no_host');
+                    $home = $Apache::lonnet::hostname{$home};
+                    $ttype='Construction Space';
+                    $twhere='User: '.$trest.'<br />Domain: '.$tdom.'<br />'.
+                        ' Server:&nbsp;'.$home;
+                    $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
+                } elsif ($role eq 'au') {
+                    # Authors
+                    my $home = &Apache::lonnet::homeserver
+                        ($ENV{'user.name'},$ENV{'user.domain'});
+                    if ($home ne $r->dir_config('lonHostID')) {
+			$button=0;
+                        $switchserver=&Apache::lonnet::escape('http://'.
+                         $Apache::lonnet::hostname{$home}.
+                          '/adm/login?domain='.$ENV{'user.domain'}.
+			   '&username='.$ENV{'user.name'}.
+                           '&firsturl=/priv/'.$ENV{'user.name'});
+                    }
+                    #next if ($home eq 'no_host');
+                    $home = $Apache::lonnet::hostname{$home};
+                    $ttype='Construction Space';
+                    $twhere='Domain: '.$tdom.'<br />Server:&nbsp;'.$home;
+                    $ENV{'course.'.$tdom.'_'.$trest.'.description'}='ca';
+                } elsif ($trest) {
+                    $ttype='Course';
+                    if ($tsection) {
+                        $ttype.='<br>Section/Group: '.$tsection;
+		    }
+                    my $tcourseid=$tdom.'_'.$trest;
+                    if ($ENV{'course.'.$tcourseid.'.description'}) {
+                        $twhere=$ENV{'course.'.$tcourseid.'.description'};
+                        unless ($twhere eq 'Currently not available') {
+                           $twhere.=' <font size="-2">'.
+        &Apache::loncommon::syllabuswrapper('Syllabus',$trest,$tdom,$tfont).
+                                    '</font>';
+		       }
                     } else {
-                        $twhere='Currently not available';
+                        my %newhash=Apache::lonnet::coursedescription
+                            ($tcourseid);
+                        if (%newhash) {
+                            $twhere=$newhash{'description'}.
+                              ' <font size="-2">'.
+        &Apache::loncommon::syllabuswrapper('Syllabus',$trest,$tdom,$tfont).
+                              '</font>';
+                        } else {
+                            $twhere='Currently not available';
+                            $ENV{'course.'.$tcourseid.'.description'}=$twhere;
+                        }
                     }
-                    $cdes{$tcourseid}=$twhere;
-                }
-            } elsif ($tdom) {
-                $ttype='Domain';
-                $twhere=$tdom;
-            } else {
-                $ttype='System';
-                $twhere='system wide';
-            }
-               
-            $r->print('<tr bgcolor='.$tbg.'>');
-            unless ($nochoose) {
-		if ($tstatus eq 'is') {
-                    $r->print('<td><input type=submit value=Select name="'.
-                              $trolecode.'"></td>');
+		    if ($role ne 'st') { $twhere.="<br />Domain:".$tdom; }
+                } elsif ($tdom) {
+                    $ttype='Domain';
+                    $twhere=$tdom;
                 } else {
-                    $r->print('<td>&nbsp;</td>');
+                    $ttype='System';
+                    $twhere='system wide';
                 }
-            }
-            $r->print('<td>'.$trole.'</td><td>'.
-		      $ttype.'</td><td>'.$twhere.'</td><td>'.$tpstart.
-                      '</td><td>'.$tpend.
-                      '</td><td>'.$tremark.'&nbsp;</td></tr>'."\n");
+ 
+# ----- do not trust the indention below here -----              
+                $r->print('<tr bgcolor='.$tbg.'>');
+                unless ($nochoose) {
+                    if (!$button) {
+			if ($switchserver) {
+			    $r->print('<td><a href="/adm/logout?handover='.
+                              $switchserver.'">Switch Server</a></td>');
+                        } else {
+                            $r->print('<td>&nbsp;</td>');
+                        }
+                    } elsif ($tstatus eq 'is') {
+                        $r->print('<td><input type=submit value=Select name="'.
+                                  $trolecode.'"></td>');
+                    } elsif ($ENV{'user.adv'}) {
+                        $r->print
+                            ('<td><input type=submit value="Re-Initialize"'.
+                             ' name="'.$trolecode.'"></td>');
+                    } else {
+                        $r->print('<td>&nbsp;</td>');
+                    }
+                }
+            $r->print('<td><font color="'.$tfont.'">'.$trole.
+                      '</font></td><td><font color="'.$tfont.'">'.$ttype.
+                      '</font></td><td><font color="'.$tfont.'">'.$twhere.
+                      '</font></td><td><font color="'.$tfont.'">'.$tpstart.
+                      '</font></td><td><font color="'.$tfont.'">'.$tpend.
+                      '</font></td><td><font color="'.$tfont.'">'.$tremark.
+                      '&nbsp;</font></td></tr>'."\n");
+	}
         }
     }
     my $tremark='';
+    my $tfont='#003300';
     if ($ENV{'request.role'} eq 'cm') {
-	$r->print('<tr bgcolor="#33FF33">');
+	$r->print('<tr bgcolor="#11CC55">');
         $tremark='Currently selected.';
+        $tfont='#002200';
     } else {
         $r->print('<tr bgcolor="#77FF77">');
     }
@@ -256,16 +421,17 @@ ENDHEADER
           $r->print('<td>&nbsp;</td>');
        }
     }
-    $r->print('<td colspan=5>No role specified'.
-                      '</td><td>'.$tremark.'&nbsp;</td></tr>'."\n");
+    $r->print('<td colspan=5><font color="'.$tfont.'">No role specified'.
+      '</font></td><td><font color="'.$tfont.'">'.$tremark.
+      '&nbsp;</font></td></tr>'."\n");
 
     $r->print('</table>');
     unless ($nochoose) {
 	$r->print("</form>\n");
     }
-# ------------------------------------------------------------ Priviledges Info
-  if ($advanced) {
-    $r->print('<hr><h2>Current Priviledges</h2>');
+# ------------------------------------------------------------ Privileges Info
+  if (($advanced) && (($ENV{'user.error.msg'}) || ($error))) {
+    $r->print('<hr><h2>Current Privileges</h2>');
 
     foreach $envkey (sort keys %ENV) {
         if ($envkey=~/^user\.priv\.$ENV{'request.role'}\./) {
@@ -276,11 +442,16 @@ ENDHEADER
             my ($tdom,$trest,$tsec)=
                split(/\//,Apache::lonnet::declutter($where));
             if ($trest) {
+	      if ($ENV{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
+	        $ttype='Construction Space';
+                $twhere='User: '.$trest.', Domain: '.$tdom;
+              } else {
 		$ttype='Course';
-                $twhere=$cdes{$tdom.'/'.$trest};
+                $twhere=$ENV{'course.'.$tdom.'_'.$trest.'.description'};
                 if ($tsec) {
 		    $twhere.=' (Section/Group: '.$tsec.')';
                 }
+	      }
             } elsif ($tdom) {
                 $ttype='Domain';
                 $twhere=$tdom;
@@ -289,7 +460,7 @@ ENDHEADER
                 $twhere='/';
             }
             $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
-            map {
+            foreach (sort split(/:/,$ENV{$envkey})) {
               if ($_) {
 		  my ($prv,$restr)=split(/\&/,$_);
                   my $trestr='';
@@ -306,20 +477,11 @@ ENDHEADER
                   $r->print('<li>'.Apache::lonnet::plaintext($prv).$trestr.
                             '</li>');
 	      }
-            } sort split(/:/,$ENV{$envkey});
+            }
             $r->print('</ul>');
         }
     }
   }
-# -------------------------------------------------------------- Debug - remove
-
-    $->print("<hr><h1>Debugging</h1><hr>\n");
-    
-    foreach $envkey (sort keys %ENV) {
-	$r->print("$envkey ---- $ENV{$envkey}<br>");
-    }
-
-# ------------------------------------------------------------------- End Debug
 
     $r->print("</body></html>\n");
     return OK;
@@ -327,3 +489,67 @@ ENDHEADER
 
 1;
 __END__
+
+=head1 NAME
+
+Apache::lonroles - User Roles Screen
+
+=head1 SYNOPSIS
+
+Invoked by /etc/httpd/conf/srm.conf:
+
+ <Location /adm/roles>
+ PerlAccessHandler       Apache::lonacc
+ SetHandler perl-script
+ PerlHandler Apache::lonroles
+ ErrorDocument     403 /adm/login
+ ErrorDocument	  500 /adm/errorhandler
+ </Location>
+
+=head1 INTRODUCTION
+
+This module enables a user to select what role he wishes to
+operate under (instructor, student, teaching assistant, course
+coordinator, etc).  These roles are pre-established by the actions
+of upper-level users.
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+=head1 HANDLER SUBROUTINE
+
+This routine is called by Apache and mod_perl.
+
+=over 4
+
+=item *
+
+Roles Initialization (yes/no)
+
+=item *
+
+Get Error Message from Environment
+
+=item *
+
+Who is this?
+
+=item *
+
+Generate Page Output
+
+=item *
+
+Choice or no choice
+
+=item *
+
+Table
+
+=item *
+
+Privileges
+
+=back
+
+=cut