# The LearningOnline Network with CAPA
# Create a user
#
# $Id: loncreateuser.pm,v 1.25 2002/02/11 15:37:58 matthew 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/
#
# (Create a course
# (My Desk
#
# (Internal Server Error Handler
#
# (Login Screen
# 5/21/99,5/22,5/25,5/26,5/31,6/2,6/10,7/12,7/14,
# 1/14/00,5/29,5/30,6/1,6/29,7/1,11/9 Gerd Kortemeyer)
#
# YEAR=2001
# 3/1/1 Gerd Kortemeyer)
#
# 3/1 Gerd Kortemeyer)
#
# 2/14 Gerd Kortemeyer)
#
# 2/14,2/17,2/19,2/20,2/21,2/22,2/23,3/2,3/17,3/24,04/12 Gerd Kortemeyer
# April Guy Albertelli
# 05/10,10/16 Gerd Kortemeyer 
# 11/12,11/13,11/15 Scott Harrison
# 02/11/02 Matthew Hall
#
# $Id: loncreateuser.pm,v 1.25 2002/02/11 15:37:58 matthew Exp $
###

package Apache::loncreateuser;

use strict;
use Apache::Constants qw(:common :http);
use Apache::lonnet;

my $loginscript; # piece of javascript used in two separate instances
my $generalrule;
my $authformnop;
my $authformkrb;
my $authformint;
my $authformfsys;
my $authformloc;

BEGIN {
    $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
    my $krbdefdom=$1;
    $krbdefdom=~tr/a-z/A-Z/;
    $authformnop=(<<END);
<p>
<input type=radio name=login value=nop checked='checked'
onClick="clicknop(this.form);">
Do not change login data
</p>
END
    $authformkrb=(<<END);
<p>
<input type=radio name=login value=krb onClick="clickkrb(this.form);">
Kerberos authenticated with domain
<input type=text size=10 name=krbdom onChange="setkrb(this.form);">
</p>
END
    $authformint=(<<END);
<p>
<input type=radio name=login value=int onClick="clickint(this.form);"> 
Internally authenticated (with initial password 
<input type=text size=10 name=intpwd onChange="setint(this.form);">)
</p>
END
    $authformfsys=(<<END);
<p>
<input type=radio name=login value=fsys onClick="clickfsys(this.form);"> 
Filesystem authenticated (with initial password 
<input type=text size=10 name=fsyspwd onChange="setfsys(this.form);">)
</p>
END
    $authformloc=(<<END);
<p>
<input type=radio name=login value=loc onClick="clickloc(this.form);" />
Local Authentication with argument
<input type=text size=10 name=locarg onChange="setloc(this.form);" />
</p>
END
    $loginscript=(<<ENDLOGINSCRIPT);
<script>
function setkrb(vf) {
    if (vf.krbdom.value!='') {
       vf.login[0].checked=true;
       vf.krbdom.value=vf.krbdom.value.toUpperCase();
       vf.intpwd.value='';
       vf.fsyspwd.value='';
       vf.locarg.value='';
   }
}

function setint(vf) {
    if (vf.intpwd.value!='') {
       vf.login[1].checked=true;
       vf.krbdom.value='';
       vf.fsyspwd.value='';
       vf.locarg.value='';
   }
}

function setfsys(vf) {
    if (vf.fsyspwd.value!='') {
       vf.login[2].checked=true;
       vf.krbdom.value='';
       vf.intpwd.value='';
       vf.locarg.value='';
   }
}

function setloc(vf) {
    if (vf.locarg.value!='') {
       vf.login[3].checked=true;
       vf.krbdom.value='';
       vf.intpwd.value='';
       vf.fsyspwd.value='';
   }
}

function clicknop(vf) {
    vf.krbdom.value='';
    vf.intpwd.value='';
    vf.fsyspwd.value='';
    vf.locarg.value='';
}

function clickkrb(vf) {
    vf.krbdom.value='$krbdefdom';
    vf.intpwd.value='';
    vf.fsyspwd.value='';
    vf.locarg.value='';
}

function clickint(vf) {
    vf.krbdom.value='';
    vf.fsyspwd.value='';
    vf.locarg.value='';
}

function clickfsys(vf) {
    vf.krbdom.value='';
    vf.intpwd.value='';
    vf.locarg.value='';
}

function clickloc(vf) {
    vf.krbdom.value='';
    vf.intpwd.value='';
    vf.fsyspwd.value='';
}
</script>
ENDLOGINSCRIPT
    $generalrule=<<END;
<p>
<i>As a general rule, only authors or co-authors should be filesystem
authenticated (which allows access to the server filesystem).</i>
</p>
END
}

# =================================================================== Phase one

sub phase_one {
    my $r=shift;
    my $defdom=$ENV{'user.domain'};
    $r->print(<<ENDDOCUMENT);
<html>
<head>
<title>The LearningOnline Network with CAPA</title>
</head>
<body bgcolor="#FFFFFF">
<h1>Create User, Change User Privileges</h1>
<form action=/adm/createuser method=post>
<input type=hidden name=phase value=two>
Username: <input type=text size=15 name=ccuname><br>
Domain: <input type=text size=15 name=ccdomain value=$defdom><p>
<input type=submit value="Continue">
</form>
</body>
</html>
ENDDOCUMENT
}

# =================================================================== Phase two

sub phase_two {
    my $r=shift;
    my $ccuname=$ENV{'form.ccuname'};
    my $ccdomain=$ENV{'form.ccdomain'};

    $ENV{'SERVER_NAME'}=~/(\w+\.\w+)$/;
    my $krbdefdom=$1;
    $krbdefdom=~tr/a-z/A-Z/;

    my $defdom=$ENV{'user.domain'};

    $ccuname=~s/\W//g;
    $ccdomain=~s/\W//g;
    my $dochead =<<"ENDDOCHEAD";
<html>
<head>
<title>The LearningOnline Network with CAPA</title>
<script>

    function pclose() {
        parmwin=window.open("/adm/rat/empty.html","LONCAPAparms",
                 "height=350,width=350,scrollbars=no,menubar=no");
        parmwin.close();
    }

    function pjump(type,dis,value,marker,ret,call) {
        parmwin=window.open("/adm/rat/parameter.html?type="+escape(type)
                 +"&value="+escape(value)+"&marker="+escape(marker)
                 +"&return="+escape(ret)
                 +"&call="+escape(call)+"&name="+escape(dis),"LONCAPAparms",
                 "height=350,width=350,scrollbars=no,menubar=no");

    }

    function dateset() {
        eval("document.cu."+document.cu.pres_marker.value+
            ".value=document.cu.pres_value.value");
        pclose();
    }

</script>
</head>
<body bgcolor="#FFFFFF">
<img align="right" src="/adm/lonIcons/lonlogos.gif">
ENDDOCHEAD
    my $forminfo =<<"ENDFORMINFO";
<form action="/adm/createuser" method="post" name="cu">
<input type="hidden" name="phase"       value="three">
<input type="hidden" name="ccuname"     value="$ccuname">
<input type="hidden" name="ccdomain"    value="$ccdomain">
<input type="hidden" name="pres_value"  value="" >
<input type="hidden" name="pres_type"   value="" >
<input type="hidden" name="pres_marker" value="" >
<input type="hidden" name="cuname"      value="$ccuname">
<input type="hidden" name="cdomain"     value="$ccdomain">
ENDFORMINFO
    my $uhome=&Apache::lonnet::homeserver($ccuname,$ccdomain);
    my %incdomains; 
    my %inccourses;
    foreach (%Apache::lonnet::hostdom) {
       $incdomains{$_}=1;
    }
    foreach (keys(%ENV)) {
	if ($_=~/^user\.priv\.cm\.\/(\w+)\/(\w+)/) {
	    $inccourses{$1.'_'.$2}=1;
        }
    }
    if ($uhome eq 'no_host') {
	$r->print(<<ENDNUSER);
$dochead
<h1>Create New User</h1>
$forminfo
<h2>New user "$ccuname" in domain $ccdomain</h2>
ENDNUSER
	$r->print(<<ENDNUSER);
$loginscript
<input type='hidden' name='makeuser' value='1' />
<h3>Personal Data</h3>
<p>
<table>
<tr><td>First Name  </td>
    <td><input type='text' name='cfirst'  size='15' /></td></tr>
<tr><td>Middle Name </td> 
    <td><input type='text' name='cmiddle' size='15' /></td></tr>
<tr><td>Last Name   </td>
    <td><input type='text' name='clast'   size='15' /></td></tr>
<tr><td>Generation  </td>
    <td><input type='text' name='cgen'    size='5'  /></td></tr>
</table>
ID/Student Number <input type='text' name='cstid'   size='15' /></p>

<hr />

<h3>Login Data</h3>
$generalrule
$authformkrb
$authformint
$authformfsys
$authformloc
ENDNUSER
    } else { # user already exists
	$r->print(<<ENDCHUSER);
$dochead
<h1>Change User Privileges</h1>
$forminfo
<h2>User "$ccuname" in domain $ccdomain </h2>
ENDCHUSER
        my $rolesdump=&Apache::lonnet::reply(
                                  "dump:$ccdomain:$ccuname:roles",$uhome);
        # Build up table of user roles to allow revocation of a role.
        unless ($rolesdump eq 'con_lost') { 
           my $now=time;
           $r->print('<h4>Revoke Existing Roles</h4>'.
             '<table border=2><tr><th>Revoke</th><th>Role</th><th>Extent</th>'.
		     '<th>Start</th><th>End</th>');
	   foreach (split(/&/,$rolesdump)) {
             if ($_!~/^rolesdef\&/) {
              my ($area,$role)=split(/=/,$_);
              my $thisrole=$area;
              $area=~s/\_\w\w$//;
              my ($role_code,$role_end_time,$role_start_time)=split(/_/,$role);
              my $bgcol='ffffff';
              my $allows=0;
              if ($area=~/^\/(\w+)\/(\d\w+)/) {
                 my %coursedata=&Apache::lonnet::coursedescription($1.'_'.$2);
                 my $carea='Course: '.$coursedata{'description'};
                 $inccourses{$1.'_'.$2}=1;
                 if (&Apache::lonnet::allowed('c'.$role_code,$1.'/'.$2)) {
		     $allows=1;
                 }
		 # What follows is an odd computation.  It seems the value
		 # of the $area variable above is used to compute the 
		 # background color.  This makes sense, but I can't make 
		 # heads or tail of the computation at this point..
                 $bgcol=$1.'_'.$2;
                 $bgcol=~s/[^8-9b-e]//g;
                 $bgcol=substr($bgcol.$bgcol.$bgcol.'ffffff',0,6);
                 if ($area=~/^\/(\w+)\/(\d\w+)\/(\w+)/) {
                     $carea.='<br>Section/Group: '.$3;
		 }
                 $area=$carea;
	      } else {
                 if ($area=~/^\/(\w+)\//) {
                     if (&Apache::lonnet::allowed('c'.$role_code,$1)) {
			 $allows=1;
                     }
                 } else {
                     if (&Apache::lonnet::allowed('c'.$role_code,'/')) {
			 $allows=1;
                     }
                 }
	      }

              my $active=1;
              if (($role_end_time) && ($now>$role_end_time)) { $active=0; }
              $r->print('<tr bgcolor=#"'.$bgcol.'"><td>');
              if (!($active) && ($allows)) {
		  $r->print('<input type=checkbox name="rev:'.$thisrole.'">');
              } else {
                  $r->print('&nbsp;');
              }
              $r->print('</td><td>'.&Apache::lonnet::plaintext($role_code).
                        '</td><td>'.$area.'</td><td>'.
                        ($role_start_time ? localtime($role_start_time)
                                          : '&nbsp;' )
			.'</td><td>'.
                        ($role_end_time   ? localtime($role_end_time)
                                          : '&nbsp;' )
			."</td></tr>\n");
	     }
	   } 
	   $r->print('</table>');
         }   
	my $currentauth=&Apache::lonnet::queryauthenticate($ccuname,$ccdomain);
	if ($currentauth=~/^krb4:/) {
	    $currentauth=~/^krb4:(.*)/;
	    my $krbdefdom2=$1;
	    $loginscript=~s/vf\.krbdom\.value='.*?';/vf.krbdom.value='$krbdefdom2';/;
	}
	# Here is where we'll have to check against the permissions of the
	# user attempting to modify this users data.  Only users with
	# MAU (Modify Authentication User) permissions should be able to 
	# make these changes.  I think a subroutine would be in order here.
        unless ($currentauth=~/^krb4:/ or
		$currentauth=~/^unix:/ or
		$currentauth=~/^internal:/ or
		$currentauth=~/^localauth:/
		) {
	    $r->print(<<END);
<hr />
$loginscript
<font color='#ff0000'>ERROR:</font>
This user has an unrecognized authentication scheme ($currentauth).
Please specify login data below.
<h3>Login Data</h3>
$generalrule
$authformkrb
$authformint
$authformfsys
$authformloc
END
        }
	else {
	    my $authformcurrent='';
	    my $authformother='';
	    if ($currentauth=~/^krb4:/) {
		$authformcurrent=$authformkrb;
		$authformother=$authformint.$authformfsys.$authformloc;
		# embarrassing script hack here
		$loginscript=~s/login\[3\]/login\[4\]/; # loc
		$loginscript=~s/login\[2\]/login\[3\]/; # fsys
		$loginscript=~s/login\[1\]/login\[2\]/; # int
		$loginscript=~s/login\[0\]/login\[1\]/; # krb4
	    }
	    elsif ($currentauth=~/^internal:/) {
		$authformcurrent=$authformint;
		$authformother=$authformkrb.$authformfsys.$authformloc;
		# embarrassing script hack here
		$loginscript=~s/login\[3\]/login\[4\]/; # loc
		$loginscript=~s/login\[2\]/login\[3\]/; # fsys
		$loginscript=~s/login\[1\]/login\[1\]/; # int
		$loginscript=~s/login\[0\]/login\[2\]/; # krb4
	    }
	    elsif ($currentauth=~/^unix:/) {
		$authformcurrent=$authformfsys;
		$authformother=$authformkrb.$authformint.$authformloc;
		# embarrassing script hack here
		$loginscript=~s/login\[3\]/login\[4\]/; # loc
		$loginscript=~s/login\[1\]/login\[3\]/; # int
		$loginscript=~s/login\[2\]/login\[1\]/; # fsys
		$loginscript=~s/login\[0\]/login\[2\]/; # krb4
	    }
	    elsif ($currentauth=~/^localauth:/) {
		$authformcurrent=$authformloc;
		$authformother=$authformkrb.$authformint.$authformfsys;
		# embarrassing script hack here
		$loginscript=~s/login\[3\]/login\[loc\]/; # loc
		$loginscript=~s/login\[2\]/login\[4\]/; # fsys
		$loginscript=~s/login\[1\]/login\[3\]/; # int
		$loginscript=~s/login\[0\]/login\[2\]/; # krb4
		$loginscript=~s/login\[loc\]/login\[1\]/; # loc
	    }
	    $authformcurrent=<<END;
<table border='1'>
<tr>
<td><font color='#ff0000'>* * * WARNING * * *</font></td>
<td><font color='#ff0000'>* * * WARNING * * *</font></td>
</tr>
<tr><td bgcolor='#cbbcbb'>$authformcurrent</td>
<td bgcolor='#cbbcbb'>Changing this value will overwrite existing authentication for the user; you should notify the user of this change.</td></tr>
</table>
END
		$r->print(<<END);
<hr />
$loginscript
<h3>Change Current Login Data</h3>
$generalrule
$authformnop
$authformcurrent
<h3>Enter New Login Data</h3>
$authformother
END
        }
    } ## End of new user/old user logic
    $r->print('<hr /><h3>Add Roles</h3>');
#
# Co-Author
# 

    if (&Apache::lonnet::allowed('cca',$ENV{'user.domain'})) {
	my $cuname=$ENV{'user.name'};
        my $cudom=$ENV{'user.domain'};
       $r->print(<<ENDCOAUTH);
<h4>Construction Space</h4>
<table border=2><tr><th>Activate</th><th>Role</th><th>Extent</th>
<th>Start</th><th>End</th></tr>
<tr>
<td><input type=checkbox name="act_$cudom\_$cuname\_ca"></td>
<td>Co-Author</td>
<td>$cudom\_$cuname</td>
<td><input type=hidden name="start_$cudom\_$cuname\_ca" value=''>
<a href=
"javascript:pjump('date_start','Start Date Co-Author',document.cu.start_$cudom\_$cuname\_ca.value,'start_$cudom\_$cuname\_ca','cu.pres','dateset')">Set Start Date</a></td>
<td><input type=hidden name="end_$cudom\_$cuname\_ca" value=''>
<a href=
"javascript:pjump('date_end','End Date Co-Author',document.cu.end_$cudom\_$cuname\_ca.value,'end_$cudom\_$cuname\_ca','cu.pres','dateset')">Set End Date</a></td>
</tr>
</table>
ENDCOAUTH
    }
#
# Domain level
#
    $r->print('<h4>Domain Level</h4>'.
    '<table border=2><tr><th>Activate</th><th>Role</th><th>Extent</th>'.
    '<th>Start</th><th>End</th></tr>');
    foreach ( sort( keys(%incdomains))) {
	my $thisdomain=$_;
        foreach ('dc','li','dg','au') {
            if (&Apache::lonnet::allowed('c'.$_,$thisdomain)) {
               my $plrole=&Apache::lonnet::plaintext($_);
               $r->print(<<ENDDROW);
<tr>
<td><input type=checkbox name="act_$thisdomain\_$_"></td>
<td>$plrole</td>
<td>$thisdomain</td>
<td><input type=hidden name="start_$thisdomain\_$_" value=''>
<a href=
"javascript:pjump('date_start','Start Date $plrole',document.cu.start_$thisdomain\_$_.value,'start_$thisdomain\_$_','cu.pres','dateset')">Set Start Date</a></td>
<td><input type=hidden name="end_$thisdomain\_$_" value=''>
<a href=
"javascript:pjump('date_end','End Date $plrole',document.cu.end_$thisdomain\_$_.value,'end_$thisdomain\_$_','cu.pres','dateset')">Set End Date</a></td>
</tr>
ENDDROW
            }
        } 
    }
    $r->print('</table>');
#
# Course level
#
    $r->print('<h4>Course Level</h4>'.
    '<table border=2><tr><th>Activate</th><th>Role</th><th>Extent</th>'.
    '<th>Group/Section</th><th>Start</th><th>End</th></tr>');
    foreach (sort( keys(%inccourses))) {
	my $thiscourse=$_;
	my $protectedcourse=$_;
        $thiscourse=~s:_:/:g;
        my %coursedata=&Apache::lonnet::coursedescription($thiscourse);
        my $area=$coursedata{'description'};
        my $bgcol=$thiscourse;
        $bgcol=~s/[^8-9b-e]//g;
        $bgcol=substr($bgcol.$bgcol.$bgcol.'ffffff',0,6);
        foreach  ('st','ta','ep','ad','in','cc') {
            if (&Apache::lonnet::allowed('c'.$_,$thiscourse)) {
               my $plrole=&Apache::lonnet::plaintext($_);
               $r->print("
<tr bgcolor=#$bgcol>
<td><input type=checkbox name=\"act_$protectedcourse\_$_\"></td>
<td>$plrole</td>
<td>$area</td>
<td>");
	       if ($_ ne 'cc') {
		 $r->print("<input type=text size=5 name=\"sec_$protectedcourse\_$_\">");
	       } else { $r->print("&nbsp"); }
	       $r->print(<<ENDROW);
<td><input type=hidden name="start_$protectedcourse\_$_" value=''>
<a href=
"javascript:pjump('date_start','Start Date $plrole',document.cu.start_$protectedcourse\_$_.value,'start_$protectedcourse\_$_','cu.pres','dateset')">Set Start Date</a></td>
<td><input type=hidden name="end_$protectedcourse\_$_" value=''>
<a href=
"javascript:pjump('date_end','End Date $plrole',document.cu.end_$protectedcourse\_$_.value,'end_$protectedcourse\_$_','cu.pres','dateset')">Set End Date</a></td>
</tr>
ENDROW
            }
        }
    } 
    $r->print('</table>');
    $r->print('<input type=submit value="Modify User">');
    $r->print('</form></body></html>');
}

# ================================================================= Phase Three

sub phase_three {
    my $r=shift;
    $r->print(<<ENDTHREEHEAD);
<html>
<head>
<title>The LearningOnline Network with CAPA</title>
</head>
<body bgcolor="#FFFFFF">
<img align=right src=/adm/lonIcons/lonlogos.gif>
<h1>Create User, Change User Privileges</h1>
ENDTHREEHEAD
   $r->print('<h2>'.$ENV{'form.cuname'}.' at '.$ENV{'form.cdomain'}.'</h2>');
   if ($ENV{'form.makeuser'}) {
    $r->print('<h3>Creating User</h3>');
    if (($ENV{'form.cuname'})&&($ENV{'form.cuname'}!~/\W/)&&
        ($ENV{'form.cdomain'})&&($ENV{'form.cdomain'}!~/\W/)) {
	my $amode='';
        my $genpwd='';
        if ($ENV{'form.login'} eq 'krb') {
           $amode='krb4';
           $genpwd=$ENV{'form.krbdom'};
        } elsif ($ENV{'form.login'} eq 'int') {
           $amode='internal';
           $genpwd=$ENV{'form.intpwd'};
        } elsif ($ENV{'form.login'} eq 'fsys') {
           $amode='unix';
           $genpwd=$ENV{'form.fsyspwd'};
        } elsif ($ENV{'form.login'} eq 'loc') {
	    $amode='localauth';
	    $genpwd=$ENV{'form.locarg'};
	    if (!$genpwd) { $genpwd=" "; }
	}
        if (($amode) && ($genpwd)) {
          $r->print('Generating user: '.&Apache::lonnet::modifyuser(
                      $ENV{'form.cdomain'},$ENV{'form.cuname'},
                      $ENV{'form.cstid'},$amode,$genpwd,
 	              $ENV{'form.cfirst'},$ENV{'form.cmiddle'},
                      $ENV{'form.clast'},$ENV{'form.cgen'}));
          $r->print('<br>Home server: '.&Apache::lonnet::homeserver
                      ($ENV{'form.cuname'},$ENV{'form.cdomain'}));

	} else {
           $r->print('Invalid login mode or password');    
        }          
    } else {
        $r->print('Invalid username or domain');
    }
   }
   if (!$ENV{'form.makeuser'} and $ENV{'form.login'} ne 'nop') {
    $r->print('<h3>Changing User Login Data</h3>');
    if (($ENV{'form.cuname'})&&($ENV{'form.cuname'}!~/\W/)&&
        ($ENV{'form.cdomain'})&&($ENV{'form.cdomain'}!~/\W/)) {
	my $amode='';
        my $genpwd='';
        if ($ENV{'form.login'} eq 'krb') {
           $amode='krb4';
           $genpwd=$ENV{'form.krbdom'};
        } elsif ($ENV{'form.login'} eq 'int') {
           $amode='internal';
           $genpwd=$ENV{'form.intpwd'};
        } elsif ($ENV{'form.login'} eq 'fsys') {
           $amode='unix';
           $genpwd=$ENV{'form.fsyspwd'};
        } elsif ($ENV{'form.login'} eq 'loc') {
	    $amode='localauth';
	    $genpwd=$ENV{'form.locarg'};
	    if (!$genpwd) { $genpwd=" "; }
	}
        if (($amode) && ($genpwd)) {
	    $r->print('Modifying authentication: '.
		 &Apache::lonnet::modifyuserauth(
		       $ENV{'form.cdomain'},$ENV{'form.cuname'},
                       $amode,$genpwd));
            $r->print('<br>Home server: '.&Apache::lonnet::homeserver
                      ($ENV{'form.cuname'},$ENV{'form.cdomain'}));

	} else {
           $r->print('Invalid login mode or password');    
        }          
    } else {
        $r->print('Invalid username or domain');
    }
   }
    my $now=time;
    $r->print('<h3>Modifying Roles</h3>');
    foreach (keys (%ENV)) {
	if (($_=~/^form\.rev\:([^\_]+)\_([^\_]+)$/) && ($ENV{$_})) {
           $r->print('Revoking '.$2.' in '.$1.': '.
          &Apache::lonnet::assignrole($ENV{'form.cdomain'},$ENV{'form.cuname'},
                                      $1,$2,$now).'<br>');
           if ($2 eq 'st') {
               $1=~/^\/(\w+)\/(\w+)/;
               my $cid=$1.'_'.$2;
	       $r->print('Drop from classlist: '.
          &Apache::lonnet::critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
	              $ENV{'course.'.$cid.'.num'}.':classlist:'.
                      &Apache::lonnet::escape($ENV{'form.cuname'}.':'.
                                              $ENV{'form.cdomain'}).'='.
                      &Apache::lonnet::escape($now.':'),
	              $ENV{'course.'.$cid.'.home'}).'<br>');
           }
	}
    } 
    foreach (keys(%ENV)) {
	if (($_=~/^form\.act\_([^\_]+)\_([^\_]+)\_([^\_]+)$/) && ($ENV{$_})) {
            my $url='/'.$1.'/'.$2;
            if ($ENV{'form.sec_'.$1.'_'.$2.'_'.$3}) {
		$url.='/'.$ENV{'form.sec_'.$1.'_'.$2.'_'.$3};
            }
            my $start=$now;
            if ($ENV{'form.start_'.$1.'_'.$2.'_'.$3}) {
		$start=$ENV{'form.start_'.$1.'_'.$2.'_'.$3};
            }
            my $end=0;
            if ($ENV{'form.end_'.$1.'_'.$2.'_'.$3}) {
		$end=$ENV{'form.end_'.$1.'_'.$2.'_'.$3};
            }
            $r->print('Assigning: '.$3.' in '.$url.': '.
          &Apache::lonnet::assignrole($ENV{'form.cdomain'},$ENV{'form.cuname'},
                                      $url,$3,$end,$start).'<br>');
            if ($3 eq 'st') {
		$url=~/^\/(\w+)\/(\w+)/;
                my $cid=$1.'_'.$2;
               $r->print('Add to classlist: '.
          &Apache::lonnet::critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
	              $ENV{'course.'.$cid.'.num'}.':classlist:'.
                      &Apache::lonnet::escape($ENV{'form.cuname'}.':'.
                                              $ENV{'form.cdomain'}).'='.
                      &Apache::lonnet::escape($end.':'.$start),
	              $ENV{'course.'.$cid.'.home'}).'<br>');
	    }
	} elsif (($_=~/^form\.act\_([^\_]+)\_([^\_]+)$/) && ($ENV{$_})) {
            my $url='/'.$1.'/';
            my $start=$now;
            if ($ENV{'form.start_'.$1.'_'.$2}) {
		$start=$ENV{'form.start_'.$1.'_'.$2};
            }
            my $end=0;
            if ($ENV{'form.end_'.$1.'_'.$2}) {
		$end=$ENV{'form.end_'.$1.'_'.$2};
            }
            $r->print('Assigning: '.$2.' in '.$url.': '.
          &Apache::lonnet::assignrole($ENV{'form.cdomain'},$ENV{'form.cuname'},
                                      $url,$2,$end,$start).'<br>');
        }
    }
    $r->print('</body></html>');
}

# ================================================================ Main Handler
sub handler {
    my $r = shift;

    if ($r->header_only) {
       $r->content_type('text/html');
       $r->send_http_header;
       return OK;
    }

    if ((&Apache::lonnet::allowed('cta',$ENV{'request.course.id'})) ||
        (&Apache::lonnet::allowed('cin',$ENV{'request.course.id'})) || 
        (&Apache::lonnet::allowed('ccr',$ENV{'request.course.id'})) || 
        (&Apache::lonnet::allowed('cep',$ENV{'request.course.id'})) ||
        (&Apache::lonnet::allowed('cca',$ENV{'user.domain'})) ||
        (&Apache::lonnet::allowed('mau',$ENV{'user.domain'}))) {
       $r->content_type('text/html');
       $r->send_http_header;
       unless ($ENV{'form.phase'}) {
	   &phase_one($r);
       }
       if ($ENV{'form.phase'} eq 'two') {
           &phase_two($r);
       } elsif ($ENV{'form.phase'} eq 'three') {
           &phase_three($r);
       }
   } else {
      $ENV{'user.error.msg'}=
        "/adm/createuser:mau:0:0:Cannot modify user data";
      return HTTP_NOT_ACCEPTABLE; 
   }
   return OK;
} 

1;
__END__