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Diff for /loncom/interface/lonpreferences.pm between versions 1.1 and 1.20

version 1.1, 2001/01/03 16:20:59 version 1.20, 2003/04/19 01:42:34
Line 1 Line 1
 # The LearningOnline Network  # The LearningOnline Network
 # Preferences  # Preferences
 #  #
   # $Id$
   #
   # 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/
   #
 # (Internal Server Error Handler  # (Internal Server Error Handler
 #  #
 # (Login Screen  # (Login Screen
Line 11 Line 35
 #  #
 # 3/1 Gerd Kortemeyer  # 3/1 Gerd Kortemeyer
 #  #
   # 2/13/02 2/14 2/15 Matthew Hall
   #
   # This package uses the "londes.js" javascript code. 
   #
   # TODOs that have to be completed:
   #    interface with lonnet to change the password
    
 package Apache::lonpreferences;  package Apache::lonpreferences;
   
 use strict;  use strict;
 use Apache::Constants qw(:common);  use Apache::Constants qw(:common);
   use Apache::File;
   use Crypt::DES;
   use DynaLoader; # for Crypt::DES version
   use Apache::loncommon();
   
   #
   # Write lonnet::passwd to do the call below.
   # Use:
   #   my $answer=reply("encrypt:passwd:$udom:$uname:$upass",$tryserver);
   #
   ##################################################
   #          password associated functions         #
   ##################################################
   sub des_keys {
       # Make a new key for DES encryption.
       # Each key has two parts which are returned seperately.
       # Please note:  Each key must be passed through the &hex function
       # before it is output to the web browser.  The hex versions cannot
       # be used to decrypt.
       my @hexstr=('0','1','2','3','4','5','6','7',
                   '8','9','a','b','c','d','e','f');
       my $lkey='';
       for (0..7) {
           $lkey.=$hexstr[rand(15)];
       }
       my $ukey='';
       for (0..7) {
           $ukey.=$hexstr[rand(15)];
       }
       return ($lkey,$ukey);
   }
   
   sub des_decrypt {
       my ($key,$cyphertext) = @_;
       my $keybin=pack("H16",$key);
       my $cypher;
       if ($Crypt::DES::VERSION>=2.03) {
           $cypher=new Crypt::DES $keybin;
       } else {
           $cypher=new DES $keybin;
       }
       my $plaintext=
    $cypher->decrypt(unpack("a8",pack("H16",substr($cyphertext,0,16))));
       $plaintext.=
    $cypher->decrypt(unpack("a8",pack("H16",substr($cyphertext,16,16))));
       $plaintext=substr($plaintext,1,ord(substr($plaintext,0,1)) );
       return $plaintext;
   }
   
   ################################################################
   #                       Handler subroutines                    #
   ################################################################
   
   ################################################################
   #         Anonymous Discussion Name Change Subroutines         #
   ################################################################
   sub screennamechanger {
       my $r = shift;
       my $user       = $ENV{'user.name'};
       my $domain     = $ENV{'user.domain'};
       my %userenv = &Apache::lonnet::get
           ('environment',['screenname','nickname']);
       my $screenname=$userenv{'screenname'};
       my $nickname=$userenv{'nickname'};
       my $bodytag=&Apache::loncommon::bodytag(
                 'Change Your Nickname and Anonymous Screen Name');
       $r->print(<<ENDSCREEN);
   <html>
   $bodytag
   
   <form name="server" action="/adm/preferences" method="post">
   <input type="hidden" name="action" value="verify_and_change_screenname" />
   <br />New screenname (shown if you post anonymously):
   <input type="text" size="20" value="$screenname" name="screenname" />
   <br />New nickname (shown if you post non-anonymously):
   <input type="text" size="20" value="$nickname" name="nickname" />
   <input type="submit" value="Change" />
   </form>
   </body>
   </html>
   ENDSCREEN
   }
   
   sub verify_and_change_screenname {
       my $r = shift;
       my $user       = $ENV{'user.name'};
       my $domain     = $ENV{'user.domain'};
   # Screenname
       my $newscreen  = $ENV{'form.screenname'};
       $newscreen=~s/[^ \w]//g;
       my $message='';
       if ($newscreen) {
           &Apache::lonnet::put('environment',{'screenname' => $newscreen});
           &Apache::lonnet::appenv('environment.screenname' => $newscreen);
           $message='Set new screenname to '.$newscreen;
       } else {
           &Apache::lonnet::del('environment',['screenname']);
           &Apache::lonnet::delenv('environment\.screenname');
           $message='Reset screenname';
       }
   # Nickname
       $message.='<br />';
       $newscreen  = $ENV{'form.nickname'};
       $newscreen=~s/[^ \w]//g;
       if ($newscreen) {
           &Apache::lonnet::put('environment',{'nickname' => $newscreen});
           &Apache::lonnet::appenv('environment.nickname' => $newscreen);
           $message.='Set new nickname to '.$newscreen;
       } else {
           &Apache::lonnet::del('environment',['nickname']);
           &Apache::lonnet::delenv('environment\.nickname');
           $message.='Reset nickname';
       }
   
       my $bodytag=&Apache::loncommon::bodytag(
                       'Change Your Nickname and Anonymous Screen Name');
       $r->print(<<ENDVCSCREEN);
   <html>
   $bodytag
   </p>
   $message
   </body></html>
   ENDVCSCREEN
   }
   
   ################################################################
   #         Message Forward                                      #
   ################################################################
   
   sub msgforwardchanger {
       my $r = shift;
       my $user       = $ENV{'user.name'};
       my $domain     = $ENV{'user.domain'};
       my %userenv = &Apache::lonnet::get('environment',['msgforward']);
       my $msgforward=$userenv{'msgforward'};
       my $notification=$userenv{'notification'};
       my $critnotification=$userenv{'critnotification'};
       my $bodytag=&Apache::loncommon::bodytag(
                       'Change Your Message Forwarding and Notification');
       $r->print(<<ENDMSG);
   <html>
   $bodytag
   
   <form name="server" action="/adm/preferences" method="post">
   <input type="hidden" name="action" value="verify_and_change_msgforward" />
   New Forwarding Address(es) (<tt>user:domain,user:domain,...</tt>):
   <input type="text" size="40" value="$msgforward" name="msgforward" /><hr />
   New Message Notification Email Address(es) (<tt>joe\@doe.com,jane\@doe.edu,...</tt>):
   <input type="text" size="40" value="$notification" name="notification" /><hr />
   New Critical Message Notification Email Address(es) (<tt>joe\@doe.com,jane\@doe.edu,...</tt>):
   <input type="text" size="40" value="$critnotification" name="critnotification" /><hr />
   <input type="submit" value="Change" />
   </form>
   </body>
   </html>
   ENDMSG
   }
   
   sub verify_and_change_msgforward {
       my $r = shift;
       my $user       = $ENV{'user.name'};
       my $domain     = $ENV{'user.domain'};
       my $newscreen  = '';
       my $message='';
       foreach (split(/\,/,$ENV{'form.msgforward'})) {
    my ($msuser,$msdomain)=split(/[\@\:]/,$_);
           $msuser=~s/\W//g;
           $msdomain=~s/\W//g;
           if (($msuser) && ($msdomain)) {
       if (&Apache::lonnet::homeserver($msuser,$msdomain) ne 'no_host') {
                  $newscreen.=$msuser.':'.$msdomain.',';
      } else {
                  $message.='No such user: '.$msuser.':'.$msdomain.'<br>';
              }
           }
       }
       $newscreen=~s/\,$//;
       if ($newscreen) {
           &Apache::lonnet::put('environment',{'msgforward' => $newscreen});
           &Apache::lonnet::appenv('environment.msgforward' => $newscreen);
           $message.='Set new message forwarding to '.$newscreen.'<br />';
       } else {
           &Apache::lonnet::del('environment',['msgforward']);
           &Apache::lonnet::delenv('environment\.msgforward');
           $message.='Reset message forwarding<br />';
       }
       my $notification=$ENV{'form.notification'};
       $notification=~s/\s//gs;
       if ($notification) {
           &Apache::lonnet::put('environment',{'notification' => $notification});
           &Apache::lonnet::appenv('environment.notification' => $notification);
           $message.='Set message notification address to '.$notification.'<br />';
       } else {
           &Apache::lonnet::del('environment',['notification']);
           &Apache::lonnet::delenv('environment\.notification');
           $message.='Reset message notification<br />';
       }
       my $critnotification=$ENV{'form.critnotification'};
       $critnotification=~s/\s//gs;
       if ($critnotification) {
           &Apache::lonnet::put('environment',{'critnotification' => $critnotification});
           &Apache::lonnet::appenv('environment.critnotification' => $critnotification);
           $message.='Set critical message notification address to '.$critnotification;
       } else {
           &Apache::lonnet::del('environment',['critnotification']);
           &Apache::lonnet::delenv('environment\.critnotification');
           $message.='Reset critical message notification<br />';
       }
       my $bodytag=&Apache::loncommon::bodytag(
                              'Change Your Message Forwarding and Notifications');
       $r->print(<<ENDVCMSG);
   <html>
   $bodytag
   </p>
   $message
   </body></html>
   ENDVCMSG
   }
   
   ################################################################
   #         Colors                                               #
   ################################################################
   
   sub colorschanger {
       my $r = shift;
       my $bodytag=&Apache::loncommon::bodytag(
                       'Change Color Scheme for Current Role Type');
   # figure out colors
       my $function='student';
       if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
    $function='coordinator';
       }
       if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
    $function='admin';
       }
       if (($ENV{'request.role'}=~/^(au|ca)/) ||
    ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
    $function='author';
       }
       my $domain=&Apache::loncommon::determinedomain();
       my %colortypes=('pgbg'  => 'Page Background',
                       'tabbg' => 'Header Background',
                       'sidebg'=> 'Header Border',
                       'font'  => 'Font',
                       'link'  => 'Un-Visited Link',
                       'vlink' => 'Visited Link',
                       'alink' => 'Active Link');
       my $chtable='';
       foreach my $item (keys %colortypes) {
          my $curcol=&Apache::loncommon::designparm($function.'.'.$item,$domain);
          $chtable.='<tr><td>'.$colortypes{$item}.'</td><td bgcolor="'.$curcol.
           '">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td><input name="'.$item.
           '" size="8" value="'.$curcol.
   '" /></td><td><a href="javascript:pjump('."'color','".$colortypes{$item}.
   "','".$curcol."','"
       .$item."','".$item."','psub'".');">Select</a></td></tr>';
       }
       $r->print(<<ENDCOL);
   <html>
   <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 psub() {
           pclose();
           if (document.parmform.pres_marker.value!='') {
               document.parmform.action+='#'+document.parmform.pres_marker.value;
               var typedef=new Array();
               typedef=document.parmform.pres_type.value.split('_');
              if (document.parmform.pres_type.value!='') {
               if (typedef[0]=='date') {
                   eval('document.parmform.recent_'+
                        document.parmform.pres_type.value+
        '.value=document.parmform.pres_value.value;');
               } else {
                   eval('document.parmform.recent_'+typedef[0]+
        '.value=document.parmform.pres_value.value;');
               }
      }
               document.parmform.submit();
           } else {
               document.parmform.pres_value.value='';
               document.parmform.pres_marker.value='';
           }
       }
   
   
   </script>
   $bodytag
   
   <form name="server" action="/adm/preferences" method="post">
   <input type="hidden" name="action" value="verify_and_change_colors" />
   <table border="2">
   $chtable
   </table>
   <input type="submit" value="Change" />
   </form>
   </body>
   </html>
   ENDCOL
   }
   
   sub verify_and_change_colors {
       my $r = shift;
   # figure out colors
       my $function='student';
       if ($ENV{'request.role'}=~/^(cc|in|ta|ep)/) {
    $function='coordinator';
       }
       if ($ENV{'request.role'}=~/^(su|dc|ad|li)/) {
    $function='admin';
       }
       if (($ENV{'request.role'}=~/^(au|ca)/) ||
    ($ENV{'REQUEST_URI'}=~/^(\/priv|\~)/)) {
    $function='author';
       }
       my $domain=&Apache::loncommon::determinedomain();
       my %colortypes=('pgbg'  => 'Page Background',
                       'tabbg' => 'Header Background',
                       'sidebg'=> 'Header Border',
                       'font'  => 'Font',
                       'link'  => 'Un-Visited Link',
                       'vlink' => 'Visited Link',
                       'alink' => 'Active Link');
   
       my $message='';
   #    my $newscreen='';
   #    $newscreen=~s/\,$//;
   #    if ($newscreen) {
   #        &Apache::lonnet::put('environment',{'msgforward' => $newscreen});
   #        &Apache::lonnet::appenv('environment.msgforward' => $newscreen);
   #        $message.='Set new message forwarding to '.$newscreen.'<br />';
   #    } else {
   #        &Apache::lonnet::del('environment',['msgforward']);
   #        &Apache::lonnet::delenv('environment\.msgforward');
   #        $message.='Reset message forwarding<br />';
   #    }
   
       my $bodytag=&Apache::loncommon::bodytag(
                              'Change Color Scheme for Current Role Type');
       $r->print(<<ENDVCCOL);
   <html>
   $bodytag
   </p>
   $message
   </body></html>
   ENDVCCOL
   }
   
   ######################################################
   #            password handler subroutines            #
   ######################################################
   sub passwordchanger {
       # This function is a bit of a mess....
       # Passwords are encrypted using londes.js (DES encryption)
       my $r = shift;
       my $errormessage = shift;
       $errormessage = ($errormessage || '');
       my $user       = $ENV{'user.name'};
       my $domain     = $ENV{'user.domain'};
       my $homeserver = $ENV{'user.home'};
       my $currentauth=&Apache::lonnet::queryauthenticate($user,$domain);
       # Check for authentication types that allow changing of the password.
       return if ($currentauth !~ /^(unix|internal):/);
       #
       # Generate keys
       my ($lkey_cpass ,$ukey_cpass ) = &des_keys();
       my ($lkey_npass1,$ukey_npass1) = &des_keys();
       my ($lkey_npass2,$ukey_npass2) = &des_keys();
       # Store the keys in the log files
       my $lonhost = $r->dir_config('lonHostID');
       my $logtoken=Apache::lonnet::reply('tmpput:'
          .$ukey_cpass  . $lkey_cpass .'&'
          .$ukey_npass1 . $lkey_npass1.'&'
          .$ukey_npass2 . $lkey_npass2,
          $lonhost);
       # Hexify the keys for output as javascript variables
       $ukey_cpass = hex($ukey_cpass);
       $lkey_cpass = hex($lkey_cpass);
       $ukey_npass1= hex($ukey_npass1);
       $lkey_npass1= hex($lkey_npass1);
       $ukey_npass2= hex($ukey_npass2);
       $lkey_npass2= hex($lkey_npass2);
       # Output javascript to deal with passwords
       # Output DES javascript
       $r->print("<html><head>");
       {
    my $include = $r->dir_config('lonIncludes');
    my $jsh=Apache::File->new($include."/londes.js");
    $r->print(<$jsh>);
       }
       my $bodytag=&Apache::loncommon::bodytag('Change Password','',
                                            'onLoad="init();"');
       $r->print(<<ENDFORM);
   </head>
   $bodytag
   
   <script language="JavaScript">
   
       function send() {
           uextkey=this.document.client.elements.ukey_cpass.value;
           lextkey=this.document.client.elements.lkey_cpass.value;
           initkeys();
   
           this.document.server.elements.currentpass.value
               =crypted(this.document.client.elements.currentpass.value);
   
           uextkey=this.document.client.elements.ukey_npass1.value;
           lextkey=this.document.client.elements.lkey_npass1.value;
           initkeys();
           this.document.server.elements.newpass_1.value
               =crypted(this.document.client.elements.newpass_1.value);
   
           uextkey=this.document.client.elements.ukey_npass2.value;
           lextkey=this.document.client.elements.lkey_npass2.value;
           initkeys();
           this.document.server.elements.newpass_2.value
               =crypted(this.document.client.elements.newpass_2.value);
   
           this.document.server.submit();
       }
   
   </script>
   $errormessage
   
   <p>
   <!-- We seperate the forms into 'server' and 'client' in order to
        ensure that unencrypted passwords will not be sent out by a
        crappy browser -->
   
   <form name="server" action="/adm/preferences" method="post">
   <input type="hidden" name="logtoken"    value="$logtoken" />
   <input type="hidden" name="action"      value="verify_and_change_pass" />
   <input type="hidden" name="currentpass" value="" />
   <input type="hidden" name="newpass_1"   value="" />
   <input type="hidden" name="newpass_2"   value="" />
   </form>
   
   <form name="client" >
   <table>
   <tr><td align="right"> Current password:                      </td>
       <td><input type="password" name="currentpass" size="10"/> </td></tr>
   <tr><td align="right"> New password:                          </td>
       <td><input type="password" name="newpass_1" size="10"  /> </td></tr>
   <tr><td align="right"> Confirm password:                      </td>
       <td><input type="password" name="newpass_2" size="10"  /> </td></tr>
   <tr><td colspan="2" align="center">
       <input type="button" value="Change Password" onClick="send();">
   </table>
   <input type="hidden" name="ukey_cpass"  value="$ukey_cpass" />
   <input type="hidden" name="lkey_cpass"  value="$lkey_cpass" />
   <input type="hidden" name="ukey_npass1" value="$ukey_npass1" />
   <input type="hidden" name="lkey_npass1" value="$lkey_npass1" />
   <input type="hidden" name="ukey_npass2" value="$ukey_npass2" />
   <input type="hidden" name="lkey_npass2" value="$lkey_npass2" />
   </form>
   </p>
   ENDFORM
       #
       return;
   }
   
   sub verify_and_change_password {
       my $r = shift;
       my $user       = $ENV{'user.name'};
       my $domain     = $ENV{'user.domain'};
       my $homeserver = $ENV{'user.home'};
       my $currentauth=&Apache::lonnet::queryauthenticate($user,$domain);
       # Check for authentication types that allow changing of the password.
       return if ($currentauth !~ /^(unix|internal):/);
       #
       $r->print(<<ENDHEADER);
   <html>
   <head>
   <title>LON-CAPA Preferences:  Change password for $user</title>
   </head>
   ENDHEADER
       #
       my $currentpass = $ENV{'form.currentpass'}; 
       my $newpass1    = $ENV{'form.newpass_1'}; 
       my $newpass2    = $ENV{'form.newpass_2'};
       my $logtoken    = $ENV{'form.logtoken'};
       # Check for empty data 
       unless (defined($currentpass) && 
       defined($newpass1)    && 
       defined($newpass2)    ){
    &passwordchanger($r,"<p>\n<font color='#ff0000'>ERROR</font>".
    "Password data was blank.\n</p>");
    return;
       }
       # Get the keys
       my $lonhost = $r->dir_config('lonHostID');
       my $tmpinfo = Apache::lonnet::reply('tmpget:'.$logtoken,$lonhost);
       if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
           # I do not a have a better idea about how to handle this
    $r->print(<<ENDERROR);
   <p>
   <font color="#ff0000">ERROR:</font> Unable to retrieve stored token for
   password decryption.  Please log out and try again.
   </p>
   ENDERROR
           # Probably should log an error here
           return;
       }
       my ($ckey,$n1key,$n2key)=split(/&/,$tmpinfo);
       # 
       $currentpass = &des_decrypt($ckey ,$currentpass);
       $newpass1    = &des_decrypt($n1key,$newpass1);
       $newpass2    = &des_decrypt($n2key,$newpass2);
       # 
       if ($newpass1 ne $newpass2) {
    &passwordchanger($r,
    '<font color="#ff0000">ERROR:</font>'.
    'The new passwords you entered do not match.  '.
    'Please try again.');
    return;
       }
       if (length($newpass1) < 7) {
    &passwordchanger($r,
    '<font color="#ff0000">ERROR:</font>'.
    'Passwords must be a minimum of 7 characters long.  '.
    'Please try again.');
    return;
       }
       #
       # Check for bad characters
       my $badpassword = 0;
       foreach (split(//,$newpass1)) {
    $badpassword = 1 if ((ord($_)<32)||(ord($_)>126));
       }
       if ($badpassword) {
    # I can't figure out how to enter bad characters on my browser.
    &passwordchanger($r,<<ENDERROR);
   <font color="#ff0000">ERROR:</font>
   The password you entered contained illegal characters.<br />
   Valid characters are: space and <br />
   <pre>
   !&quot;\#$%&amp;\'()*+,-./0123456789:;&lt;=&gt;?\@
   ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_\`abcdefghijklmnopqrstuvwxyz{|}~
   </pre>
   ENDERROR
       }
       # 
       # Change the password (finally)
       my $result = &Apache::lonnet::changepass
    ($user,$domain,$currentpass,$newpass1,$homeserver);
       # Inform the user the password has (not?) been changed
       if ($result =~ /^ok$/) {
    $r->print(<<"ENDTEXT");
   <h2>The password for $user was successfully changed</h2>
   ENDTEXT
       } else {
    # error error: run in circles, scream and shout
           $r->print(<<ENDERROR);
   <h2><font color="#ff0000">The password for $user was not changed</font></h2>
   Please make sure your old password was entered correctly.
   ENDERROR
       }
       return;
   }
   
   ######################################################
   #            other handler subroutines               #
   ######################################################
   
   ################################################################
   #                          Main handler                        #
   ################################################################
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
       my $user = $ENV{'user.name'};
       my $domain = $ENV{'user.domain'};
     $r->content_type('text/html');      $r->content_type('text/html');
       # Some pages contain DES keys and should not be cached.
       &Apache::loncommon::no_cache($r);
     $r->send_http_header;      $r->send_http_header;
     return OK if $r->header_only;      return OK if $r->header_only;
       #
 # --------------------------------------------------- Print login screen header      if ($ENV{'form.action'} eq 'changepass') {
     $r->print(<<ENDDOCUMENT);   &passwordchanger($r);
       } elsif ($ENV{'form.action'} eq 'verify_and_change_pass') {
    &verify_and_change_password($r);
       } elsif ($ENV{'form.action'} eq 'changescreenname') {
           &screennamechanger($r);
       } elsif ($ENV{'form.action'} eq 'verify_and_change_screenname') {
           &verify_and_change_screenname($r);
       } elsif ($ENV{'form.action'} eq 'changemsgforward') {
           &msgforwardchanger($r);
       } elsif ($ENV{'form.action'} eq 'verify_and_change_msgforward') {
           &verify_and_change_msgforward($r);
       } elsif ($ENV{'form.action'} eq 'changecolors') {
           &colorschanger($r);
       } elsif ($ENV{'form.action'} eq 'verify_and_change_colors') {
           &verify_and_change_colors($r);
       } elsif ($ENV{'form.action'} eq 'debugtoggle') {
    if ($ENV{'user.name'} eq 'albertel' ) {
       if ($ENV{'user.debug'}) {
    &Apache::lonnet::delenv('user\.debug');
       } else {
    &Apache::lonnet::appenv('user.debug' => 1);
       }
    }
       } else {
    $r->print(<<ENDHEADER);
 <html>  <html>
 <head>  <head>
 <title>The LearningOnline Network with CAPA</title>  <title>LON-CAPA Preferences</title>
 </head>  </head>
 <body bgcolor="#FFFFFF">  ENDHEADER
 <h1>Preferences</h1>          $r->print(&Apache::loncommon::bodytag('Change Your Preferences'));
 <img src="/adm/lonKaputt/lonconstruct.gif">   # Determine current authentication method
    my $currentauth=&Apache::lonnet::queryauthenticate($user,$domain);
    if ($currentauth =~ /^(unix|internal):/) {
       $r->print(<<ENDPASSWORDFORM);
   <form name="client" action="/adm/preferences" method="post">
   <input type="hidden" name="action" value="changepass" />
   <input type="submit" value="Change password" />
   </form>
   ENDPASSWORDFORM
           }
   # Change screen name
       $r->print(<<ENDSCREENNAMEFORM);
   <form name="client" action="/adm/preferences" method="post">
   <input type="hidden" name="action" value="changescreenname" />
   <input type="submit" 
   value="Change nickname and anonymous discussion screen name" />
   </form>
   ENDSCREENNAMEFORM
       $r->print(<<ENDMSGFORWARDFORM);
   <form name="client" action="/adm/preferences" method="post">
   <input type="hidden" name="action" value="changemsgforward" />
   <input type="submit" value="Change message forwarding and notification addresses" />
   </form>
   ENDMSGFORWARDFORM
   # The "about me" page
    my $aboutmeaction=
       '/adm/'.$ENV{'user.domain'}.'/'.$ENV{'user.name'}.'/aboutme';
    $r->print(<<ENDABOUTME);
   <form name="client" action="$aboutmeaction" method="post">
   <input type="hidden" name="action" value="changescreenname" />
   <input type="submit" value="Edit the 'About Me' personal information screen" />
   </form>
   ENDABOUTME
       $r->print(<<ENDCOLORFORM);
   <form name="client" action="/adm/preferences" method="post">
   <input type="hidden" name="action" value="changecolors" />
   <input type="submit" value="Change color scheme" />
   </form>
   ENDCOLORFORM
   
    if ($ENV{'user.name'} eq 'albertel') {
       $r->print(<<ENDDEBUG);
   <form name="client" action="/adm/preferences" method="post">
   <input type="hidden" name="action" value="debugtoggle" />
   <input type="submit" value="Toggle Debug" />
   Current Debug status is -$ENV{'user.debug'}-.
   </form>
   ENDDEBUG
    }
    # Other preference setting code should be added here
       }
       $r->print(<<ENDFOOTER);
 </body>  </body>
 </html>  </html>
 ENDDOCUMENT  ENDFOOTER
     return OK;      return OK;
 }   }
   
 1;  1;
 __END__  __END__
Removed from v.1.1  
changed lines
  Added in v.1.20

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