--- loncom/auth/lonroles.pm	2000/06/12 18:25:03	1.3
+++ loncom/auth/lonroles.pm	2002/11/12 22:36:38	1.44
@@ -1,81 +1,450 @@
 # The LearningOnline Network with CAPA
 # User Roles Screen
+#
+# $Id: lonroles.pm,v 1.44 2002/11/12 22:36:38 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)
-# 1/14,03/06,06/01 Gerd Kortemeyer
+# YEAR=2000
+# 1/14,03/06,06/01,07/22,07/24,07/25,
+# 09/04,09/06,09/28,09/29,09/30,10/2,10/5,10/26,10/28,
+# 12/08,12/28,
+# YEAR=2001
+# 01/15/01 Gerd Kortemeyer
+# 02/27/01 Scott Harrison
+# 03/02,05/03,05/25,05/30,06/01,07/06,08/06 Gerd Kortemeyer
+# 12/21 Scott Harrison
+# 12/29 Gerd Kortemeyer
 #
+###
+
 package Apache::lonroles;
 
 use strict;
 use Apache::lonnet();
+use Apache::lonuserstate();
 use Apache::Constants qw(:common);
 use Apache::File();
+use Apache::lonmenu;
+use Apache::loncommon;
 
 sub handler {
+
     my $r = shift;
-    $r->content_type('text/html');
-    $r->send_http_header;
-    return OK if $r->header_only;
 
-# --------------------------------------------------- Read Plain Text for Roles
+    my $now=time;
+    my $then=$ENV{'user.login.time'};
+    my $envkey;
 
-    my $tabdir  = $r->dir_config('lonTabDir');
 
-    my @rolesplain;
-    my %plain;
+# ================================================================== Roles Init
 
-    {
-       my $idf=Apache::File->new("$tabdir/rolesplain.tab");
-       @rolesplain=<$idf>;
+    if ($ENV{'form.selectrole'}) {
+	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 $envkey (keys %ENV) {
+            next if ($envkey!~/^user\.role\./);
+	    my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
+            my $where=join('.',@pwhere);
+            my $trolecode=$role.'.'.$where;
+            if ($ENV{'form.'.$trolecode}) {
+               my ($tstart,$tend)=split(/\./,$ENV{$envkey});
+               my $tstatus='is';
+               if ($tstart) {
+      		  if ($tstart>$then) { 
+                     $tstatus='future';
+                  }
+               }
+               if ($tend) {
+                  if ($tend<$then) { $tstatus='expired'; }
+                  if ($tend<$now) { $tstatus='will_not'; }
+               }
+               if ($tstatus eq 'is') {
+                   $where=~s/^\///;
+                   my ($cdom,$cnum,$csec)=split(/\//,$where);
+                   &Apache::lonnet::appenv('request.role'        => $trolecode,
+                                           'request.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 $swinfo=&Apache::lonmenu::rawconfig($r);
+                         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>$msg</h1>
+</body>
+</html>
+ENDREDIR
+                            return OK;
+                     }
+                   }
+               }
+            } 
+        }
     }
-    map {
-        my ($short,$long)=split(/:/,$_);
-        $plain{$short}=$long;
-    } @rolesplain;
 
-# ---------------------------------------------------------------- Print Header
+
+# =============================================================== No Roles Init
+
+    $r->content_type('text/html');
+    &Apache::loncommon::no_cache($r);
+    $r->send_http_header;
+    return OK if $r->header_only;
+
+    my $swinfo=&Apache::lonmenu::rawconfig($r);
+    my $bodytag=&Apache::loncommon::bodytag('User Roles');
+    my $helptag=&Apache::loncommon::help_open_topic("General_Intro","HELP");
     $r->print(<<ENDHEADER);
 <html>
 <head>
 <title>LON-CAPA User Roles</title>
 </head>
-<body bgcolor="#FFFFFF">
+$bodytag
+$helptag<p>&nbsp;</p>
+<script>
+$swinfo
+window.focus();
+</script>
 ENDHEADER
 
 # ------------------------------------------ Get Error Message from Environment
 
     my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$ENV{'user.error.msg'});
+    if ($ENV{'user.error.msg'}) {
+       $r->log_reason(
+     "$msg for $ENV{'user.name'} domain $ENV{'user.domain'} access $priv",$fn);
+    }
 
-# -------------------------------------------------------- Generate Page Output
+# ---------------------------------------------------------------- Who is this?
+
+    my $advanced=0;
+    foreach $envkey (keys %ENV) {
+        if ($envkey=~/^user\.role\./) {
+	    my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
+            if ($role ne 'st') { $advanced=1; }
+        }
+    }
 
+# -------------------------------------------------------- Generate Page Output
+# --------------------------------------------------------------- Error Header?
     if ($error) {
 	$r->print("<h1>LON-CAPA Access Control</h1>");
-        $r->print("<hr><pre>Access  : $plain{$priv}<br>");
-        $r->print("Resource: $fn<br>");
-        $r->print("Action  : $msg</pre><hr>");
-        $r->log_reason(
- "$msg for $ENV{'user.name'} domain $ENV{'user.domain'} access $priv",$fn);
+        $r->print("<hr><pre>Access  : ".
+                  Apache::lonnet::plaintext($priv)."\n");
+        $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) {
-	$r->print("<h2>Assigned User Roles</h2>");
+        if ($advanced) {
+	   $r->print("<h2>Assigned User Roles</h2>\n");
+        } else {
+           $r->print("<h2>Sorry ...</h2>\nThis resource might be part of");
+           if ($ENV{'request.course.id'}) {
+	       $r->print(' another');
+           } else {
+               $r->print(' a certain');
+           } 
+           $r->print(' course.</body></html>');
+           return OK;
+        } 
     } else {
-        $r->print("<h2>Select a User Role</h2>\n");
-        $r->print('<form method=get action="'.$fn.'">');
-$r->print('<input type=hidden name=blue value=green><input type=submit></form>');
+        if ($advanced) {
+           $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>');
     }
-    my $envkey;
+    $r->print('<br>Show all roles: <input type=checkbox name=showall');
+    if ($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>'); }
+       $r->print('<th>User Role</th><th colspan=2>Extent</th>'.
+                 '<th>Start</th><th>End</th><th>Remark</th></tr>'."\n");
+
     foreach $envkey (sort keys %ENV) {
-	$r->print("$envkey ---- $ENV{$envkey}<br>");
+        my $button = 1;
         if ($envkey=~/^user\.role\./) {
-	    my ($dum1,$dum2,$role,$where)=split(/\./,$envkey);
-            $r->print("$plain{$role} for $where<br>");
+	    my (undef,undef,$role,@pwhere)=split(/\./,$envkey);
+            my $where=join('.',@pwhere);
+            my $trolecode=$role.'.'.$where;
+            my ($tstart,$tend)=split(/\./,$ENV{$envkey});
+            my $tremark='';
+            my $tstatus='is';
+            my $tpstart='&nbsp;';
+            my $tpend='&nbsp;';
+            if ($tstart) {
+		if ($tstart>$then) { 
+                    $tstatus='future';
+                    if ($tstart<$now) { $tstatus='will'; }
+                }
+                $tpstart=localtime($tstart);
+            }
+            if ($tend) {
+                if ($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') || ($tstatus eq 'selected') ||
+                ($ENV{'form.showall'})) {
+                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='#11CC55';
+                    $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($where));
+                # First, Co-Authorship roles
+                if ($role eq 'ca') {
+                    my $home = &Apache::lonnet::homeserver($trest,$tdom);
+                    $button = 0 if ($home ne $r->dir_config('lonHostID'));
+                    #next if ($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'});
+                    $button = 0 if ($home ne $r->dir_config('lonHostID'));
+                    #next if ($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'}) {
+                        $twhere=
+&Apache::loncommon::syllabuswrapper($ENV{'course.'.$tcourseid.'.description'},
+$trest,$tdom);
+                    } else {
+                        my %newhash=Apache::lonnet::coursedescription
+                            ($tcourseid);
+                        if (%newhash) {
+                            $twhere=
+&Apache::loncommon::syllabuswrapper($newhash{'description'},$trest,$tdom);
+                        } else {
+                            $twhere='Currently not available';
+                            $ENV{'course.'.$tcourseid.'.description'}=$twhere;
+                        }
+                    }
+		    if ($role ne 'st') { $twhere.="<br />Domain:".$tdom; }
+                } elsif ($tdom) {
+                    $ttype='Domain';
+                    $twhere=$tdom;
+                } else {
+                    $ttype='System';
+                    $twhere='system wide';
+                }
+ 
+# ----- do not trust the indention below here -----              
+                $r->print('<tr bgcolor='.$tbg.'>');
+                unless ($nochoose) {
+                    if (!$button) {
+                        $r->print('<td>&nbsp;</td>');
+                    } elsif ($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>');
+                    }
+                }
+            $r->print('<td>'.$trole.'</td><td>'.
+		      $ttype.'</td><td>'.$twhere.'</td><td>'.$tpstart.
+                      '</td><td>'.$tpend.
+                      '</td><td>'.$tremark.'&nbsp;</td></tr>'."\n");
+	}
         }
     }
+    my $tremark='';
+    if ($ENV{'request.role'} eq 'cm') {
+	$r->print('<tr bgcolor="#11CC55">');
+        $tremark='Currently selected.';
+    } else {
+        $r->print('<tr bgcolor="#77FF77">');
+    }
+    unless ($nochoose) {
+       if ($ENV{'request.role'} ne 'cm') {
+          $r->print('<td><input type=submit value=Select name="cm"></td>');
+       } else {
+          $r->print('<td>&nbsp;</td>');
+       }
+    }
+    $r->print('<td colspan=5>No role specified'.
+                      '</td><td>'.$tremark.'&nbsp;</td></tr>'."\n");
+
+    $r->print('</table>');
+    unless ($nochoose) {
+	$r->print("</form>\n");
+    }
+# ------------------------------------------------------------ Privileges Info
+  if (($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'}\./) {
+            my $where=$envkey;
+            $where=~s/^user\.priv\.$ENV{'request.role'}\.//;
+            my $ttype;
+            my $twhere;
+            my ($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';
+                $twhere=$ENV{'course.'.$tdom.'_'.$trest.'.description'};
+                if ($tsec) {
+		    $twhere.=' (Section/Group: '.$tsec.')';
+                }
+	      }
+            } elsif ($tdom) {
+                $ttype='Domain';
+                $twhere=$tdom;
+            } else {
+                $ttype='System';
+                $twhere='/';
+            }
+            $r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
+            foreach (sort split(/:/,$ENV{$envkey})) {
+              if ($_) {
+		  my ($prv,$restr)=split(/\&/,$_);
+                  my $trestr='';
+                  if ($restr ne 'F') {
+                      my $i;
+                      $trestr.=' (';
+                      for ($i=0;$i<length($restr);$i++) {
+		         $trestr.=
+                           Apache::lonnet::plaintext(substr($restr,$i,1));
+                         if ($i<length($restr)-1) { $trestr.=', '; }
+		      }
+                      $trestr.=')';
+                  }
+                  $r->print('<li>'.Apache::lonnet::plaintext($prv).$trestr.
+                            '</li>');
+	      }
+            }
+            $r->print('</ul>');
+        }
+    }
+  }
 
     $r->print("</body></html>\n");
     return OK;
@@ -83,3 +452,67 @@ $r->print('<input type=hidden name=blue
 
 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