# The LearningOnline Network with CAPA
# The LON-CAPA Grading handler
#
# $Id: grades.pm,v 1.39 2002/07/18 21:27:57 ng 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/
#
# 2/9,2/13 Guy Albertelli
# 6/8 Gerd Kortemeyer
# 7/26 H.K. Ng
# 8/20 Gerd Kortemeyer
# Year 2002
# June, July 2002 H.K. Ng
#

package Apache::grades;
use strict;
use Apache::style;
use Apache::lonxml;
use Apache::lonnet;
use Apache::loncommon;
use Apache::lonhomework;
use Apache::lonmsg qw(:user_normal_msg);
use Apache::Constants qw(:common);
#use Time::HiRes qw( gettimeofday tv_interval );

sub moreinfo {
  my ($request,$reason) = @_;
  $request->print("Unable to process request: $reason");
  if ( $Apache::grades::viewgrades eq 'F' ) {
    $request->print('<form action="/adm/grades" method="post">'."\n");
    if ($ENV{'form.url'}) {
      $request->print('<input type="hidden" name="url" value="'.$ENV{'form.url'}.'" />'."\n");
    }
    if ($ENV{'form.symb'}) {
      $request->print('<input type="hidden" name="symb" value="'.$ENV{'form.symb'}.'" />'."\n");
    }
#    $request->print('<input type="hidden" name="command" value="submission" />'."\n");
    $request->print('<input type="hidden" name="command" value="'.$ENV{'form.command'}.'" />'."\n");
    $request->print("Student:".'<input type="text" name="student" value="'.$ENV{'form.student'}.'" />'."<br />\n");
    $request->print("Domain:".'<input type="text" name="domain" value="'.$ENV{'user.domain'}.'" />'."<br />\n");
    $request->print('<input type="submit" name="submit" value="ReSubmit" />'."<br />\n");
    $request->print('</form>');
  }
  return '';
}

sub verifyreceipt {
    my $request=shift;
    my $courseid=$ENV{'request.course.id'};
#    my $cdom=$ENV{"course.$courseid.domain"};
#    my $cnum=$ENV{"course.$courseid.num"};
    my $receipt=unpack("%32C*",$Apache::lonnet::perlvar{'lonHostID'}).'-'.
                $ENV{'form.receipt'};
    $receipt=~s/[^\-\d]//g;
    my $symb=$ENV{'form.symb'};
    unless ($symb) {
	$symb=&Apache::lonnet::symbread($ENV{'form.url'});
    }
    if ((&Apache::lonnet::allowed('mgr',$courseid)) && ($symb)) {
        $request->print('<h1>Verifying Submission Receipt '.$receipt.'</h1>');
        my $matches=0;
        my ($classlist) = &getclasslist('all','0');
        foreach my $student ( sort(@{ $$classlist{'all'} }) ) {
            my ($uname,$udom)=split(/\:/,$student);
            if ($receipt eq 
             &Apache::lonnet::ireceipt($uname,$udom,$courseid,$symb)) {
               $request->print('Matching '.$student.'<br>');
               $matches++;
	   }
        }
        $request->printf('<p>'.$matches." match%s</p>",$matches <= 1 ? '' : 'es');
# needs to print who is matched
    }
    return '';
}

sub student_gradeStatus {
   my ($url,$udom,$uname,$partlist) = @_;
   my $symb=($ENV{'form.symb'} ne '' ? $ENV{'form.symb'} : (&Apache::lonnet::symbread($url)));
   my %record= &Apache::lonnet::restore($symb,$ENV{'request.course.id'},$udom,$uname);
   my %partstatus = ();
   foreach (@$partlist) {
      my ($status,$foo)=split(/_/,$record{"resource.$_.solved"},2);
      $status = 'nothing' if ($status eq '');
      $partstatus{$_} = $status;
   }
   return %partstatus;
}

sub get_fullname {
    my ($uname,$udom) = @_;
    my %name=&Apache::lonnet::get('environment', ['lastname','generation',
						  'firstname','middlename'],
				  $udom,$uname);
    my $fullname;
    my ($tmp) = keys(%name);
    if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
	$fullname=$name{'lastname'}.$name{'generation'};
	if ($fullname =~ /[^\s]+/) { $fullname.=', '; }
	$fullname.=$name{'firstname'}.' '.$name{'middlename'};
    }
    return $fullname;
}

sub response_type {
   my ($url) = shift;
   my $allkeys = &Apache::lonnet::metadata($url,'keys');
   my %seen = ();
   my (@partlist,%handgrade);
   foreach (split(/,/,&Apache::lonnet::metadata($url,'packages'))) {
      if (/^\w+response_\d{1,2}.*/) {
	 my ($responsetype,$part) = split(/_/,$_,2);
	 my ($partid,$respid) = split(/_/,$part);
	 $handgrade{$part} = $responsetype.':'.($allkeys =~ /parameter_$part\_handgrade/ ? 'yes' : 'no');
	 next if ($seen{$partid} > 0);
	 $seen{$partid}++;
	 push @partlist,$partid;
      }
   }
   return \@partlist,\%handgrade;
}


sub listStudents {
  my ($request) = shift;
  my $cdom      =$ENV{"course.$ENV{'request.course.id'}.domain"};
  my $cnum      =$ENV{"course.$ENV{'request.course.id'}.num"};
  my $getsec    =$ENV{'form.section'};
  my $submitonly=$ENV{'form.submitonly'};

  my $result='<h2><font color="#339933">&nbsp;View Submissions for a Student or a Group of Students</font></h2>';
  $result.='<table border="0">';
  $result.='<tr><td colspan=3><font size=+1><b>Resource: </b>'.$ENV{'form.url'}.'</font></td></tr>';
  my ($partlist,$handgrade) = &response_type($ENV{'form.url'});
  for (sort keys(%$handgrade)) {
      my ($responsetype,$handgrade)=split(/:/,$$handgrade{$_});
      $result.='<tr><td><b>Part id: </b>'.$_.'</td>'.
	  '<td><b>Type: </b>'.$responsetype.'</td>'.
	  '<td><b>Handgrade: </b>'.$handgrade.'</font></td></tr>';
  }
  $result.='</table>';
  $request->print($result);

  $request->print(<<ENDTABLEST);
<form action="/adm/grades" method="post">
&nbsp;<b>View Problem: </b><input type="radio" name="vProb" value="no" checked> no 
<input type="radio" name="vProb" value="yes"> yes <br />
&nbsp;<b>Submissions: </b>
<input type="radio" name="lastSub" value="lastonly" checked /> last sub only
<input type="radio" name="lastSub" value="last" /> last sub & parts info
<input type="radio" name="lastSub" value="all" /> all details
<input type="hidden" name="section" value="$getsec" />
<input type="hidden" name="submitonly" value="$submitonly" />
<input type="hidden" name="response" value="$ENV{'form.response'}" />
<input type="hidden" name="handgrade" value="$ENV{'form.handgrade'}" />
<input type="submit" name="submit" value="View/Grade" />
ENDTABLEST
  if ($ENV{'form.url'}) {
      $request->print('<input type="hidden" name="url" value="'.$ENV{'form.url'}.'" />'."\n");
  }
  if ($ENV{'form.symb'}) {
      $request->print('<input type="hidden" name="symb" value="'.$ENV{'form.symb'}.'" />'."\n");
  }
  $request->print('<input type="hidden" name="command" value="processGroup" />'."\n");

  my ($classlist,$seclist,$ids,$stusec,$fullname) = &getclasslist($getsec,'0');

  $result='<table border="0"><tr><td bgcolor="#777777">'.
      '<table border="0"><tr bgcolor="#e6ffff">'.
      '<td><b>&nbsp;Select&nbsp;</b></td><td><b>&nbsp;Username&nbsp;</b></td>'.
      '<td><b>&nbsp;Fullname&nbsp;</b></td><td><b>&nbsp;Domain&nbsp;</b></td>';
  foreach (sort(@$partlist)) {
      $result.='<td><b>&nbsp;Part ID '.$_.' Status&nbsp;</b></td>';
  }
  $request->print($result.'</tr>'."\n");

  foreach my $student (sort(@{ $$classlist{$getsec} }) ) {
      my ($uname,$udom) = split(/:/,$student);
      my (%status) = &student_gradeStatus($ENV{'form.url'},$udom,$uname,$partlist);
      my $statusflg = '';
      foreach (keys(%status)) {
	  $statusflg = 1 if ($status{$_} ne 'nothing');
      }
      next if ($statusflg eq '' && $submitonly eq 'yes');

      if ( $Apache::grades::viewgrades eq 'F' ) {
	  $result='<tr bgcolor="#ffffe6">'.
	      '<td align="center"><input type=checkbox name="stuinfo" value="'.
	      $student.':'.$$fullname{$student}.'"></td>'."\n".
	      '<td>&nbsp;'.$uname.'&nbsp;</td>'."\n".
	      '<td>&nbsp;'.$$fullname{$student}.'&nbsp;</td>'."\n".
	      '<td align="middle">&nbsp;'.$udom.'&nbsp;</td>'."\n";

	  foreach (sort keys(%status)) {
	      $result.='<td align="middle">&nbsp;'.$status{$_}.'&nbsp;</td>'."\n";
	  }
	  $request->print($result.'</tr>'."\n");
      }
  }
  $request->print('</table></td></tr></table>');
  $request->print('<input type="submit" name="submit" value="View/Grade" /><form />');
}

sub processGroup {
  my ($request)  = shift;
  my $ctr        = 0;
  my @stuchecked = (ref($ENV{'form.stuinfo'}) ? @{$ENV{'form.stuinfo'}}
                           : ($ENV{'form.stuinfo'}));
  my $total      = scalar(@stuchecked)-1;
  if ($stuchecked[0] eq '') {
      &userError($request,'No student was selected for viewing/grading.');
      return;
  }
  foreach (@stuchecked) {
      my ($uname,$udom,$fullname) = split(/:/);
      $ENV{'form.student'} = $uname;
      $ENV{'form.fullname'} = $fullname;
      &submission($request,$ctr,$total);
      $ctr++;
  }
  return '';
}

sub userError {
    my ($request, $reason, $step) = @_;
    $request->print('<h3><font color="red">LON-CAPA User Error</font></h3><br />'."\n");
    $request->print('<b>Reason: </b>'.$reason.'<br /><br />'."\n");
    $request->print('<b>Step: </b>'.($step ne '' ? $step : 'Use your browser back button to correct')
		    .'<br /><br />'."\n");
    return '';
}

#FIXME - needs to handle multiple matches
sub finduser {
  my ($name) = @_;
  my $domain = '';
  if ( $Apache::grades::viewgrades eq 'F' ) {
    my ($classlist) = &getclasslist('all','0');
    foreach ( sort(@{ $$classlist{'all'} }) ) {
      my ($posname,$posdomain) = split(/:/);
      if ($posname =~ $name) { $name=$posname; $domain=$posdomain; last; }
    }
    return ($name,$domain);
  } else {
    return ($ENV{'user.name'},$ENV{'user.domain'});
  }
}

sub getclasslist {
   my ($getsec,$hideexpired) = @_;
   my %classlist=&Apache::lonnet::dump('classlist',
				       $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
				       $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
   my $now = time;
   my (@holdsec,@sections,%allids,%stusec,%fullname);
   foreach (keys(%classlist)) {
       my ($end,$start,$id,$section,$fullname)=split(/:/,$classlist{$_});
       # still a student?
       if (($hideexpired) && ($end) && ($end < $now)) {
	   next;
       }
       $section = ($section ne '' ? $section : 'no');
       push @holdsec,$section;
       if ($getsec eq 'all' || $getsec eq $section) {
	   push (@{ $classlist{$getsec} }, $_);
	   $allids{$_}=$id;
	   $stusec{$_}=$section;
	   $fullname{$_}=$fullname;
       }
   }
   my %seen = ();
   foreach my $item (@holdsec) {
       push (@sections, $item) unless $seen{$item}++;
   }
   return (\%classlist,\@sections,\%allids,\%stusec,\%fullname);
}

sub getpartlist {
  my ($url) = @_;
  my @parts =();
  my (@metakeys) = split(/,/,&Apache::lonnet::metadata($url,'keys'));
  foreach my $key (@metakeys) {
    if ( $key =~ m/stores_([0-9]+)_.*/) {
      push(@parts,$key);
    }
  }
  return @parts;
}

sub viewstudentgrade {
  my ($url,$symb,$courseid,$student,@parts) = @_;
  my $cellclr = '"#ffffdd"';
  my ($username,$domain) = split(/:/,$student);

  my $fullname = &get_fullname($username,$domain);
  my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$username);

  my $result="<tr bgcolor=$cellclr><td>$username</td><td>$fullname</td><td align=\"middle\">$domain</td>\n";
  foreach my $part (@parts) {
    my ($temp,$part,$type)=split(/_/,$part);
    my $score=$record{"resource.$part.$type"};
    if ($type eq 'awarded' || $type eq 'tries') {
      $result.='<td align="middle"><input type="text" name="GRADE.'.$student.'.'.$part.'.'.$type.
	  '" value="'.$score.'" size="4" /></td>'."\n";
    } elsif ($type eq 'solved') {
      my ($status,$foo)=split(/_/,$score,2);
      $result.="<td align=\"middle\"><select name=\"GRADE.$student.$part.$type\">\n";
      my $optsel = '<option>correct</option><option>incorrect</option><option>excused</option>'.
	  '<option>ungraded</option><option>nothing</option>'."\n";
      $status = 'nothing' if ($status eq '');
      $optsel =~ s/<option>$status/<option selected="on">$status/;
      $result.=$optsel;
      $result.="</select></td>\n";
    }
  }
  $result.='</td></tr>';
  return $result;
}

#FIXME need to look at the metadata <stores> spec on what type of data to accept and provide an
#interface based on that, also do that to above function.
sub setstudentgrade {
  my ($url,$symb,$courseid,$student,@parts) = @_;
  print "set student grade parts=@parts<br>";
  my $result ='';
  my ($stuname,$domain) = split(/:/,$student);
  my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$stuname);
  my %newrecord;

  foreach my $part (@parts) {
    my ($temp,$part,$type)=split(/_/,$part);
    my $oldscore=$record{"resource.$part.$type"};
    my $newscore=$ENV{"form.GRADE.$student.$part.$type"};
    print "old=$oldscore:new=$newscore:<br>";
    if ($type eq 'solved') {
      my $update=0;
      if ($newscore eq 'nothing' ) {
	if ($oldscore ne '') {
	  $update=1;
	  $newscore = '';
	}
      } elsif ($oldscore !~ m/^$newscore/) {
	$update=1;
	$result.="Updating $stuname to $newscore<br />\n";
	if ($newscore eq 'correct')   { $newscore = 'correct_by_override'; }
	if ($newscore eq 'incorrect') { $newscore = 'incorrect_by_override'; }
	if ($newscore eq 'excused')   { $newscore = 'excused'; }
	if ($newscore eq 'ungraded')  { $newscore = 'ungraded_attempted'; }
#	if ($newscore eq 'partial')   { $newscore = 'correct_partially_by_override'; }
      } else {
	#$result.="$stuname:$part:$type:unchanged  $oldscore to $newscore:<br />\n";
      }
      if ($update) { $newrecord{"resource.$part.$type"}=$newscore; }
    } else {
      if ($oldscore ne $newscore) {
	$newrecord{"resource.$part.$type"}=$newscore;
	$result.="Updating $student"."'s status for $part.$type to $newscore<br />\n";
      } else {
	#$result.="$stuname:$part:$type:unchanged  $oldscore to $newscore:<br />\n";
      }
    }
  }
  if ( scalar(keys(%newrecord)) > 0 ) {
    $newrecord{'resource.regrader'}="$ENV{'user.name'}:$ENV{'user.domain'}";
#    &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$stuname);

    $result.="Stored away ".scalar(keys(%newrecord))." elements.<br />\n";
  }
  return $result;
}

#
# --------------------------- show submissions of a student, option to grade --------
sub submission {
  my ($request,$counter,$total) = @_;

  (my $url=$ENV{'form.url'})=~s-^http://($ENV{'SERVER_NAME'}|$ENV{'HTTP_HOST'})--;
  if ($ENV{'form.student'} eq '') { &moreinfo($request,'Need student login id'); return ''; }
  my ($uname,$udom) = &finduser($ENV{'form.student'});
  if ($uname eq '') { &moreinfo($request,'Unable to find student'); return ''; }

  my $symb=($ENV{'form.symb'} ne '' ? $ENV{'form.symb'} : (&Apache::lonnet::symbread($url)));
  if ($symb eq '') { $request->print("Unable to handle ambiguous references:$url:."); return ''; }
  my $last = ($ENV{'form.lastSub'} eq 'last' ? 'last' : '');

  # header info
  if ($counter == 0) {
      &sub_page_js($request);
      $request->print('<h2>&nbsp;<font color="#339933">Submission Record</font></h2>'.
		      '<font size=+1>&nbsp;<b>Resource: </b>'.$url.'</font>');

      # option to display problem, only once else it cause problems with the form later 
      # since the problem has a form.
      if ($ENV{'form.vProb'} eq 'yes') {
	  my $rendered=&Apache::loncommon::get_student_view($symb,$uname,$udom,
							    $ENV{'request.course.id'});
	  my $companswer=&Apache::loncommon::get_student_answers($symb,$uname,$udom,
								 $ENV{'request.course.id'});
	  my $result.='<table border="0" width="100%"><tr><td bgcolor="#777777">';
	  $result.='<table border="0" width="100%"><tr><td bgcolor="#e6ffff">';
	  $result.='<b>Student\'s view of the problem</b></td></tr><tr><td bgcolor="#ffffff">'.$rendered.'<br />';
	  $result.='<b>Correct answer:</b><br />'.$companswer;
	  $result.='</td></tr></table>';
	  $result.='</td></tr></table><br />';
	  $request->print($result);
      }

      # kwclr is the only variable that is guaranteed to be non blank if this subroutine has been called once.
      my %keyhash = ();
      if ($ENV{'form.kwclr'} eq '') {
	  %keyhash = &Apache::lonnet::dump('nohist_handgrade',
					      $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
					      $ENV{'course.'.$ENV{'request.course.id'}.'.num'});

	  my $loginuser = $ENV{'user.name'}.':'.$ENV{'user.domain'};
	  $ENV{'form.keywords'} = $keyhash{$symb.'_keywords'} ne '' ? $keyhash{$symb.'_keywords'} : '';
	  $ENV{'form.kwclr'}    = $keyhash{$loginuser.'_kwclr'} ne '' ? $keyhash{$loginuser.'_kwclr'} : 'red';
	  $ENV{'form.kwsize'}   = $keyhash{$loginuser.'_kwsize'} ne '' ? $keyhash{$loginuser.'_kwsize'} : '0';
	  $ENV{'form.kwstyle'}  = $keyhash{$loginuser.'_kwstyle'} ne '' ? $keyhash{$loginuser.'_kwstyle'} : '';
	  $ENV{'form.msgsub'}   = $keyhash{$symb.'_subject'} ne '' ? 
	      $keyhash{$symb.'_subject'} : &Apache::lonnet::metadata($url,'title');
	  $ENV{'form.savemsgN'} = $keyhash{$symb.'_savemsgN'} ne '' ? $keyhash{$symb.'_savemsgN'} : '0';

      }
      $request->print('<form action="/adm/grades" method="post" name="SCORE">'."\n".
		      '<input type="hidden" name="command"    value="handgrade" />'."\n".
		      '<input type="hidden" name="refresh"    value="off" />'."\n".
		      '<input type="hidden" name="symb"       value="'.$symb.'" />'."\n".
		      '<input type="hidden" name="url"        value="'.$url.'" />'."\n".
		      '<input type="hidden" name="vProb"      value="'.$ENV{'form.vProb'}.'" />'."\n".
		      '<input type="hidden" name="lastSub"    value="'.$ENV{'form.lastSub'}.'" />'."\n".
		      '<input type="hidden" name="section"    value="'.$ENV{'form.section'}.'">'."\n".
		      '<input type="hidden" name="submitonly" value="'.$ENV{'form.submitonly'}.'">'."\n".
		      '<input type="hidden" name="response"   value="'.$ENV{'form.response'}.'">'."\n".
		      '<input type="hidden" name="handgrade"  value="'.$ENV{'form.handgrade'}.'">'."\n".
		      '<input type="hidden" name="keywords"   value="'.$ENV{'form.keywords'}.'" />'."\n".
		      '<input type="hidden" name="kwclr"      value="'.$ENV{'form.kwclr'}.'" />'."\n".
		      '<input type="hidden" name="kwsize"     value="'.$ENV{'form.kwsize'}.'" />'."\n".
		      '<input type="hidden" name="kwstyle"    value="'.$ENV{'form.kwstyle'}.'" />'."\n".
		      '<input type="hidden" name="msgsub"     value="'.$ENV{'form.msgsub'}.'" />'."\n".
		      '<input type="hidden" name="savemsgN"   value="'.$ENV{'form.savemsgN'}.'" />'."\n".
		      '<input type="hidden" name="NCT"'.
		      ' value="'.($ENV{'form.NTSTU'} ne '' ? $ENV{'form.NTSTU'} : $total+1).'" />'."\n");

      my ($cts,$prnmsg) = (1,'');
      while ($cts <= $ENV{'form.savemsgN'}) {
	  $prnmsg.='<input type="hidden" name="savemsg'.$cts.'" value="'.
	      ($keyhash{$symb.'_savemsg'.$cts} eq '' ? $ENV{'form.savemsg'.$cts} : $keyhash{$symb.'_savemsg'.$cts}).
	      '" />'."\n";
	  $cts++;
      }
      $request->print($prnmsg);

      if ($ENV{'form.handgrade'} eq 'yes') {
	  $request->print(<<KEYWORDS);
&nbsp;<b>Keyword Options:</b>&nbsp;
<a href="javascript:keywords(document.SCORE.keywords)"; TARGET=_self>List</a>&nbsp; &nbsp;
<a href="#" onMouseDown="javascript:getSel(); return false"
 CLASS="page">Paste Selection to List</a>&nbsp; &nbsp;
<a href="javascript:kwhighlight()"; TARGET=_self>Highlight Attribute</a><br /><br />
KEYWORDS
      }
  }

  # Student info
  $request->print(($counter == 0 ? '' : '<br />'));
  my $fullname = ($ENV{'form.fullname'} ne '' ? $ENV{'form.fullname'} : &get_fullname($uname,$udom));
  my $result.='<table border="0" width=100%><tr><td bgcolor="#777777">'.
      '<table border="0" width=100%><tr bgcolor="#ffffff"><td>';
  $result.='<table border="0"><tr bgcolor="#ffffff"><td><b>Fullname: </b>'.$fullname.
      '</td><td>&nbsp; &nbsp;<b>Username: </b>'.$uname.
	      '</td><td>&nbsp; &nbsp;<b>Domain: </b>'.$udom.'</td></tr>';
  if ($ENV{'form.handgrade'} eq 'yes') {
#      my $subonly = &get_last_submission($symb,$uname,$udom,$ENV{'request.course.id'});
      my ($classlist) = &getclasslist('all','0');
      my @collaborators;
#      foreach ( sort(@{ $$classlist{'all'} }) ) {
#	  my ($uname,$udom) = split(/:/);
#	  push @collaborators,$uname if (grep /\b$uname(\b|\.)/i,$subonly);
#      }
#      push @collaborators,'leede','carlandmm','freyniks'; # as a test to display collaborators.
      if (scalar(@collaborators) != 0) {
	  $result.='<tr bgcolor="#ffffff"><td colspan=3><b>Collaborators: </b>';
	  foreach (@collaborators) {
	      $result.=$_.' ('.&get_fullname($_,$udom).') &nbsp; &nbsp;';
	  }
	  $result.='</td></tr>'."\n";
	  $result.='<input type="hidden" name="collaborator'.$counter.
	      '" value="'.(join ':',@collaborators).'" />'."\n";
      }
  }
  $result.='</table>'."\n";
  $request->print($result);

  my ($partlist,$handgrade) = &response_type($url);

 # print student answer
  if ($ENV{'form.lastSub'} eq 'lastonly') {
      my ($string,$timestamp)=&get_last_submission ($symb,$uname,$udom,$ENV{'request.course.id'});
      my $lastsubonly='<table border="0" width=100%><tr><td bgcolor="#777777">';
      $lastsubonly.='<table border="0" width=100%><tr bgcolor="#ddffff">';
      $lastsubonly.='<td><b>Last Submission Only</b>'.
	  ($$timestamp eq '' ? '' : '&nbsp; &nbsp; <b>Date Submitted:</b> '.$$timestamp).'</td></tr>';
      if ($$timestamp eq '') {
	  $lastsubonly.='<tr><td bgcolor="#ffffe6">'.$$string[0].'</td></tr>';
      } else {
	  for my $part (sort keys(%$handgrade)) {
	      foreach (@$string) {
		  my ($partid,$respid) = /^resource\.(\d{1,2})\.(\d{1,2})\.submission/;
		  if ($part eq ($partid.'_'.$respid)) {
		      my ($ressub,$subval) = split(/:/,$_,2);
		      $lastsubonly.='<tr><td bgcolor="#ffffe6"><b>Part ID</b> '.
			  $partid.' <b>Response ID</b> '.$respid.
			  ' <b>Submission</b> '.&keywords_highlight($subval).'</td></tr>';
		  }
	      }
	  }
      }
      $lastsubonly.='</td></tr></table></td></tr></table>'."\n";
      $request->print($lastsubonly);
  } else {
      $request->print(&Apache::loncommon::get_previous_attempt($symb,$uname,$udom,
							       $ENV{'request.course.id'},$last,
							       '.submission','Apache::grades::keywords_highlight'));
  }

  $result='<input type="hidden" name="newmsg'.$counter.'" value="" />'."\n".
      '<input type="hidden" name="includemsg'.$counter.'" value="" />'."\n".
      '<input type="hidden" name="unamedom'.$counter.'" value="'.$uname.':'.$udom.'" />'."\n";
  $result.='&nbsp;<a href="javascript:msgCenter(document.SCORE,'.$counter.
      ',\''.$fullname.'\')"; TARGET=_self>Compose Message</a><br />'."\n" if ($ENV{'form.handgrade'} eq 'yes');
  $request->print($result);

  my %seen = ();
  my @partlist;
  for (sort keys(%$handgrade)) {
      my ($partid,$respid) = split(/_/);
      next if ($seen{$partid} > 0);
      $seen{$partid}++;
      next if ($$handgrade{$_} =~ /:no$/);
      push @partlist,$partid;
      my $wgt    = &Apache::lonnet::EXT('resource.'.$partid.'.weight',$symb,$udom,$uname);
      my $wgtmsg = ($wgt > 0 ? '(problem weight)' : '<font color="red">problem weight assigned by computer</font>');
      $wgt       = ($wgt > 0 ? $wgt : '1');
      my %record = &Apache::lonnet::restore($symb,$ENV{'request.course.id'},$udom,$uname);
      my $score  = ($record{'resource.0.awarded'} eq '' ? '' : $record{'resource.0.awarded'}*$wgt);

      # display grading options
      $result='<input type="hidden" name="WGT'.$counter.'_'.$partid.'" value="'.$wgt.'" />';

      $result.='<table border="0"><tr><td><b>Part </b>'.$partid.' <b>Points</b></td><td>';

      my $ctr = 0;
      $result.='<table border="0"><tr>';  # display radio buttons in a nice table 10 across
      while ($ctr<=$wgt) {
	  $result.= '<td><input type="radio" name="RADVAL'.$counter.'_'.$partid.'" '.
	      'onclick="javascript:writeBox(this.form.GRADE_BOX'.$counter.'_'.$partid.
	      ',this.form.GRADE_SEL'.$counter.'_'.$partid.','.$ctr.
	      ',this.form.stores'.$counter.'_'.$partid.')" '.
	      ($score eq $ctr ? 'checked':'').' /> '.$ctr."</td>\n";
	  $result.=(($ctr+1)%10 == 0 ? '</tr><tr>' : '');
	  $ctr++;
      }
      $result.='</tr></table>';

      $result.='</td><td>&nbsp;<b>or</b>&nbsp;</td>';
      $result.='<td><input type="text" name="GRADE_BOX'.$counter.'_'.$partid.'"'.
	  ($score ne ''? ' value = "'.$score.'"':'').' size="4" '.
	  'onChange="javascript:updateRadio(this.form.RADVAL'.$counter.'_'.$partid.
	  ',this.form.GRADE_BOX'.$counter.'_'.$partid.
	  ',this.form.GRADE_SEL'.$counter.'_'.$partid.
	  ',this.form.stores'.$counter.'_'.$partid.')" /></td>'."\n";
      $result.='<td>/'.$wgt.' '.$wgtmsg.' </td><td>';

      $result.='<select name="GRADE_SEL'.$counter.'_'.$partid.'" '.
	  'onChange="javascript:clearRadBox(this.form.RADVAL'.$counter.'_'.$partid.
	  ',this.form.GRADE_BOX'.$counter.'_'.$partid.
	  ',this.form.GRADE_SEL'.$counter.'_'.$partid.
	  ',this.form.stores'.$counter.'_'.$partid.')" />'."\n".
	  '<option selected="on"> </option>'.
	  '<option>excused</option></select>'."&nbsp&nbsp\n";
      $result.='<input type="hidden" name="stores'.$counter.'_'.$partid.'" value="0" />';
      $result.='</td></tr></table>';
      $request->print($result);
  }
  $request->print('<input type="hidden" name="partlist'.$counter.'" value="'.(join ":",@partlist).'" />'."\n");
  $request->print('</td></tr></table></td></tr></table>'."\n");

  # print end of form
  if ($counter == $total) {
      my $endform.='<table border="0"><tr><td><input type="submit" name="gradeOpt" value="Save & Next" />';
      my $ntstu ='<select name="NTSTU">'.
	  '<option>1</option><option>2</option>'.
	      '<option>3</option><option>5</option>'.
		  '<option>7</option><option>10</option></select>'."\n";
      my $nsel = ($ENV{'form.NTSTU'} ne '' ? $ENV{'form.NTSTU'} : '1');
      $ntstu =~ s/<option>$nsel/<option selected="on">$nsel/;
      $endform.=$ntstu.'student(s) &nbsp;&nbsp;';
      $endform.='<input type="submit" name="gradeOpt" value="Next" />&nbsp';
      $endform.='<input type="submit" name="gradeOpt" value="Previous" />&nbsp';
      $endform.='(Next and Previous do not save the scores.)';
      $endform.='</td><tr></table></form>';
      $request->print($endform);
  }

  return '';
}

sub get_last_submission {
  my ($symb,$username,$domain,$course)=@_;
  if ($symb) {
      my (@string,$timestamp);
      my (%returnhash)=&Apache::lonnet::restore($symb,$course,$domain,$username);
      if ($returnhash{'version'}) {
	  my %lasthash=();
	  my ($version);
	  for ($version=1;$version<=$returnhash{'version'};$version++) {
	      foreach (sort(split(/\:/,$returnhash{$version.':keys'}))) {
		  $lasthash{$_}=$returnhash{$version.':'.$_};
	      }
	  }
	  foreach ((keys %lasthash)) {
	      if ($_ =~ /\.submission$/) {push @string, (join(':',$_,$lasthash{$_}))}
	      if ($_ =~ /timestamp/) {$timestamp = scalar(localtime($lasthash{$_}))};
	  }
      }
      @string = $string[0] eq '' ? 'Nothing submitted - no attempts.' : @string;
      return \@string,\$timestamp;
  }
}

sub keywords_highlight {
  my $string  = shift;
  my $size    = $ENV{'form.kwsize'} eq '0' ? '' : 'size='.$ENV{'form.kwsize'};
  my $styleon = $ENV{'form.kwstyle'} eq ''  ? '' : $ENV{'form.kwstyle'};
  (my $styleoff = $styleon) =~ s/\</\<\//;
  my @keylist = split(/[,\s+]/,$ENV{'form.keywords'});
  foreach (@keylist) {
      $string =~ s/\b$_(\b|\.)/\<font color\=$ENV{'form.kwclr'} $size\>$styleon$_$styleoff\<\/font\>/gi;
  }
  return $string;
}

sub processHandGrade {
  my ($request) = shift;
  my $url    = $ENV{'form.url'};
  my $symb   = $ENV{'form.symb'};
  my $button = $ENV{'form.gradeOpt'};
  my $ngrade = $ENV{'form.NCT'};
  my $ntstu  = $ENV{'form.NTSTU'};

  my $loginuser = $ENV{'user.name'}.':'.$ENV{'user.domain'};
  my %keyhash = ();
  $ENV{'form.keywords'} =~ s/,\s{0,}|\s+/ /g;
  $ENV{'form.keywords'} =~ s/^\s+|\s+$//;
  $keyhash{$symb.'_keywords'} = $ENV{'form.keywords'};
  $keyhash{$symb.'_subject'} = $ENV{'form.msgsub'};
  $keyhash{$loginuser.'_kwclr'} = $ENV{'form.kwclr'};
  $keyhash{$loginuser.'_kwsize'} = $ENV{'form.kwsize'};
  $keyhash{$loginuser.'_kwstyle'} = $ENV{'form.kwstyle'};

  my ($ctr,$idx) = (1,1);
  while ($ctr <= $ENV{'form.savemsgN'}) {
      if ($ENV{'form.savemsg'.$ctr} ne '') {
	  $keyhash{$symb.'_savemsg'.$idx} = $ENV{'form.savemsg'.$ctr};
	  $idx++;
      }
      $ctr++;
  }
  $ctr = 0;
  while ($ctr < $ngrade) {
      if ($ENV{'form.newmsg'.$ctr} ne '') {
	  $keyhash{$symb.'_savemsg'.$idx} = $ENV{'form.newmsg'.$ctr};
	  $ENV{'form.savemsg'.$idx} = $ENV{'form.newmsg'.$ctr};
	  $idx++;
      }
      $ctr++;
  }
  $ENV{'form.savemsgN'} = --$idx;
  $keyhash{$symb.'_savemsgN'} = $ENV{'form.savemsgN'};
  my $putresult = &Apache::lonnet::put
      ('nohist_handgrade',\%keyhash,
       $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
       $ENV{'course.'.$ENV{'request.course.id'}.'.num'});

  if ($ENV{'form.refresh'} eq 'on') {
      my $ctr = 0;
      while ($ctr < $ntstu) {
	  ($ENV{'form.student'},my $udom) = split(/:/,$ENV{'form.unamedom'.$ctr});
	  &submission($request,$ctr,$ntstu-1);
	  $ctr++;
      }
      return '';
  }

  if ($button eq 'Save & Next') {
      my $ctr = 0;
      while ($ctr < $ngrade) {
	  my ($uname,$udom) = split(/:/,$ENV{'form.unamedom'.$ctr});
	  my ($errorflg) = &saveHandGrade($request,$url,$symb,$uname,$udom,$ctr);
	  return '' if ($errorflg eq 'error');

	  my $includemsg = $ENV{'form.includemsg'.$ctr};
	  my ($subject,$message,$msgstatus) = ('','','');
	  if ($includemsg =~ /savemsg|new$ctr/) {
	      $subject = $ENV{'form.msgsub'} if ($includemsg =~ /^msgsub/);
	      my (@msgnum) = split(/,/,$includemsg);
	      foreach (@msgnum) {
		  $message.=$ENV{'form.'.$_} if ($_ =~ /savemsg|newmsg/ && $_ ne '');
	      }
	      $message =~ s/\s+/ /g;
	      $msgstatus = &Apache::lonmsg::user_normal_msg ($uname,$udom,$ENV{'form.msgsub'},$message);
	  }
	  if ($ENV{'form.collaborator'.$ctr}) {
	      my (@collaborators) = split(/:/,$ENV{'form.collaborator'.$ctr});
	      foreach (@collaborators) {
		  &saveHandGrade($request,$url,$symb,$_,$udom,$ctr);
		  if ($message ne '') {
		      $msgstatus = &Apache::lonmsg::user_normal_msg ($uname,$udom,$ENV{'form.msgsub'},$message);
		  }
	      }
	  }
	  $ctr++;
      }
  }
  my $firststu = $ENV{'form.unamedom0'};
  my $laststu  = $ENV{'form.unamedom'.($ngrade-1)};

  my ($classlist) = &getclasslist($ENV{'form.section'},'0');
  my (@nextlist,@prevlist);
  my ($nextflg,$ctr,$ctprev) = (0,0,0);
  my ($partlist,$handgrade) = &response_type($ENV{'form.url'});
  foreach my $student ( sort(@{ $$classlist{$ENV{'form.section'}} }) ) {
      my ($uname,$udom) = split(/:/,$student);
      my (%status) = &student_gradeStatus($ENV{'form.url'},$udom,$uname,$partlist);
      my $statusflg = '';
      foreach (keys(%status)) {
	  $statusflg = 1 if ($status{$_} ne 'nothing');
      }
      next if ($statusflg eq '' && $ENV{'form.submitonly'} eq 'yes');

      if ($nextflg == 1 && $button =~ /Next$/) {
	  push @nextlist,$uname if ($ctr < $ntstu);
	  $ctr++;
	  last if ($ctr == $ntstu);
      }
      $nextflg = 1 if ($student eq $laststu);
      if ($button eq 'Previous') {
	  last if ($student eq $firststu);
	  push @prevlist,$uname;
	  $ctprev++;
      }
  }

  if ($button eq 'Previous') {
      if ($ctprev <= $ntstu) {
	  @nextlist = @prevlist;
      } else {
	  my $idx = 0;
	  my $start = $ctprev - $ntstu;
	  while ($idx < $ntstu) {
	      $nextlist[$idx] = $prevlist[$start+$idx];
	      $idx++;
	  }
      }
  }

  $ctr = 0;
  my $total = scalar(@nextlist)-1;
  foreach my $student (@nextlist) {
      $ENV{'form.student'} = $student;
      &submission($request,$ctr,$total);
      $ctr++;
  }
  if ($total < 0) {
      my $the_end = '<h3><font color="red">LON-CAPA User Message</font></h3><br />'."\n";
      $the_end.='<b>Message: </b> No more students for this section or class.<br /><br />'."\n";
      $the_end.='Click on the button below to return to the grading menu.<br /><br />'."\n";
      $the_end.=&show_grading_menu_form ($symb,$url);
      $request->print($the_end);
  }
  return '';
}

sub saveHandGrade {
  my ($request,$url,$symb,$stuname,$domain,$newflg) = @_;
#  my %record=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},$domain,$stuname);
  my %newrecord;
  foreach (split(/:/,$ENV{'form.partlist'.$newflg})) {
      if ($ENV{'form.GRADE_SEL'.$newflg.'_'.$_} eq 'excused') {
	  $newrecord{'resource.'.$_.'.solved'} = 'excused';
      } else {
	  my $pts    = ($ENV{'form.GRADE_BOX'.$newflg.'_'.$_} ne '' ? 
		       $ENV{'form.GRADE_BOX'.$newflg.'_'.$_} : $ENV{'form.RADVAL'.$newflg.'_'.$_});
	  if ($pts eq '') {
	      &userError($request,'No point was assigned for part id '.$_.' and for username '.$stuname.'.');
	      return 'error';
	  }
	  my $wgt    = $ENV{'form.WGT'.$newflg.'_'.$_} eq '' ? 1 : $ENV{'form.WGT'.$newflg.'_'.$_};
	  my $partial= $pts/$wgt;
	  $newrecord{'resource.'.$_.'.awarded'}  = $partial;
	  if ($partial == 0) {
	      $newrecord{'resource.'.$_.'.solved'} = 'incorrect_by_override';
	  } else {
	      $newrecord{'resource.'.$_.'.solved'} = 'correct_by_override';
	  }
      }
  }

  if ( scalar(keys(%newrecord)) > 0 ) {
      $newrecord{'resource.regrader'}="$ENV{'user.name'}:$ENV{'user.domain'}";
      while (my ($k,$v) = each %newrecord) {
	 print "k=$k:v=$v:<br>\n";
      }
#     &Apache::lonnet::cstore(\%newrecord,$symb,$ENV{'request.course.id'},$domain,$stuname);
  }
  return '';
}

sub get_symb_and_url {
  my ($request) = @_;
  (my $url=$ENV{'form.url'}) =~ s-^http://($ENV{'SERVER_NAME'}|$ENV{'HTTP_HOST'})--;
  my $symb=($ENV{'form.symb'} ne '' ? $ENV{'form.symb'} : (&Apache::lonnet::symbread($url)));
  if ($symb eq '') { $request->print("Unable to handle ambiguous references:$url:."); return ''; }
  return ($symb,$url);
}

sub show_grading_menu_form {
  my ($symb,$url)=@_;
  my $result.='<form action="/adm/grades" method="post">'."\n".
    '<input type="hidden" name="symb" value="'.$symb.'" />'."\n".
      '<input type="hidden" name="url" value="'.$url.'" />'."\n".
	'<input type="hidden" name="command" value="gradingmenu" />'."\n".
	  '<input type="submit" name="submit" value="Grading Menu" />'."\n".
	    '</form>'."\n";
  return $result;
}

sub gradingmenu {
  my ($request) = @_;
  my ($symb,$url)=&get_symb_and_url($request);
  if (!$symb) {return '';}
  my $result='<h2>&nbsp;<font color="#339933">Select a Grading Method</font></h2>';
  $result.='<table border="0">';
  $result.='<tr><td colspan=3><font size=+1><b>Resource: </b>'.$url.'</font></td></tr>';
  my ($partlist,$handgrade) = &response_type($url);
  my ($resptype,$hdgrade)=('','no');
  for (sort keys(%$handgrade)) {
      my ($responsetype,$handgrade)=split(/:/,$$handgrade{$_});
      $resptype = $responsetype;
      $hdgrade = $handgrade if ($handgrade eq 'yes');
      $result.='<tr><td><b>Part id: </b>'.$_.'</td>'.
	  '<td><b>Type: </b>'.$responsetype.'</td>'.
	  '<td><b>Handgrade: </b>'.$handgrade.'</font></td></tr>';
  }
  $result.='</table>';
  $result.=&view_edit_entire_class_form($symb,$url).'<br />';
  $result.=&upcsvScores_form($symb,$url).'<br />';
  $result.=&viewGradeaStu_form($symb,$url,$resptype,$hdgrade).'<br />';
  $result.=&verifyReceipt_form($symb,$url).'<br />';
  $result.=&view_classlist_form($symb,$url);

  return $result;
}

sub view_classlist_form {
  my ($symb,$url)=@_;
  my $result.='<table width=100% border=0><tr><td bgcolor=#777777>'."\n";
  $result.='<table width=100% border=0><tr bgcolor="#e6ffff"><td>'."\n";
  $result.='&nbsp;<b>View Class List</b></td></tr>'."\n";
  $result.='<tr bgcolor=#ffffe6><td>'."\n";
  $result.='<form action="/adm/grades" method="post">'."\n".
      '<input type="hidden" name="symb" value="'.$symb.'" />'."\n".
      '<input type="hidden" name="url" value="'.$url.'" />'."\n".
      '<input type="hidden" name="command" value="viewclasslist" />'."\n";
  $result.='&nbsp;<input type="submit" name="submit" value="View Class" /></form>'."\n";
  $result.='</td></tr></table>'."\n";
  $result.='</td></tr></table>'."\n";
  return $result;
}

sub viewclasslist {
  my ($request) = shift;
  my ($coursedomain,$coursenum) = split(/_/,$ENV{'request.course.id'});
  my %classlist=&Apache::lonnet::dump('classlist',$coursedomain,$coursenum);
  $request->print('<table border=1>');
  foreach (sort keys(%classlist)) {
#    my ($unam,$udom) = split(/:/,$_,2);
#    my $section = &Apache::lonnet::usection($udom,$unam,$ENV{'request.course.id'});
#    my $fullname = &get_fullname ($unam,$udom);
#    my @uname;
#    $uname[0]=$unam;
#    my %userid=&Apache::lonnet::idrget($udom,@uname);
#    my $value=$classlist{$_}.':'.$userid{$unam}.':'.$section.':'.$fullname;
#    $classlist{$_}=$value;
    $request->print('<tr><td>'.$_.' </td><td><pre> '.$classlist{$_}.'</pre></td></tr>');
  }
  $request->print('</table>');
#  my $putresult = &Apache::lonnet::put
#      ('classlist',\%classlist,
#       $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
#       $ENV{'course.'.$ENV{'request.course.id'}.'.num'});

  return '';
}

sub view_edit_entire_class_form {
  my ($symb,$url)=@_;
  my $result.='<table width=100% border=0><tr><td bgcolor=#777777>'."\n";
  $result.='<table width=100% border=0><tr bgcolor="#e6ffff"><td>'."\n";
  $result.='&nbsp;<b>View/Grade Entire Class</b></td></tr>'."\n";
  $result.='<tr bgcolor=#ffffe6><td>'."\n";
  $result.='<form action="/adm/grades" method="post">'."\n".
    '<input type="hidden" name="symb" value="'.$symb.'" />'."\n".
      '<input type="hidden" name="url" value="'.$url.'" />'."\n".
	  '<input type="hidden" name="command" value="viewgrades" />'."\n";
  $result.='&nbsp;<b>Display students who has: </b>'.
      '<input type="radio" name="submitonly" value="yes" checked> submitted'.
	  '<input type="radio" name="submitonly" value="all"> everybody <br /><br />';
  $result.='&nbsp;<input type="submit" name="submit" value="View/Grade" /></form>'."\n";
  $result.='</td></tr></table>'."\n";
  $result.='</td></tr></table>'."\n";
  return $result;
}

sub upcsvScores_form {
  my ($symb,$url) = @_;
  if (!$symb) {return '';}
  my $result.='<table width=100% border=0><tr><td bgcolor=#777777>'."\n";
  $result.='<table width=100% border=0><tr bgcolor="#e6ffff"><td>'."\n";
  $result.='&nbsp;<b>Specify a file containing the class scores for above resource</b></td></tr>'."\n";
  $result.='<tr bgcolor=#ffffe6><td>'."\n";
  my $upfile_select=&Apache::loncommon::upfile_select_html();
  $result.=<<ENDUPFORM;
<form method="post" enctype="multipart/form-data" action="/adm/grades" name="gradesupload">
<input type="hidden" name="symb" value="$symb" />
<input type="hidden" name="url" value="$url" />
<input type="hidden" name="command" value="csvuploadmap" />
$upfile_select
<br />&nbsp;<input type="submit" name="submit" value="Upload Grades" />
</form>
ENDUPFORM
  $result.='</td></tr></table>'."\n";
  $result.='</td></tr></table>'."\n";
  return $result;
}

sub viewGradeaStu_form {
  my ($symb,$url,$response,$handgrade) = @_;
  my ($classlist,$sections) = &getclasslist('all','0');
  my $result.='<table width=100% border=0><tr><td bgcolor=#777777>'."\n";
  $result.='<table width=100% border=0><tr bgcolor="#e6ffff"><td>'."\n";
  $result.='&nbsp;<b>View/Grade an Individual Student\'s Submission</b></td></tr>'."\n";
  $result.='<tr bgcolor=#ffffe6><td>'."\n";
  $result.='<form action="/adm/grades" method="post">'."\n".
     '<input type="hidden" name="symb" value="'.$symb.'" />'."\n".
      '<input type="hidden" name="url" value="'.$url.'" />'."\n".
       '<input type="hidden" name="response" value="'.$response.'" />'."\n".
        '<input type="hidden" name="handgrade" value="'.$handgrade.'" />'."\n".
	 '<input type="hidden" name="command" value="submission" />'."\n";

  $result.='&nbsp;<b>Select section:</b> <select name="section">'."\n";
  foreach (sort (@$sections)) {
      $result.= '<option>'.$_.'</option>'."\n";
  }
  $result.= '<option selected="on">all</select>'."\n";
  $result.='&nbsp;&nbsp;<b>Display students who has: </b>'.
      '<input type="radio" name="submitonly" value="yes" checked> submitted'.
	  '<input type="radio" name="submitonly" value="all"> everybody <br />';
  $result.='&nbsp;(Section "no" implies the students were not assigned a section.)<br />' 
      if (grep /no/,@$sections);

  $result.='<br />&nbsp;<input type="submit" name="submit" value="View/Grade" />'."\n".
      '</form>'."\n";
  $result.='</td></tr></table>'."\n";
  $result.='</td></tr></table>'."\n";
  return $result;
}

sub verifyReceipt_form {
  my ($symb,$url) = @_;
  my $cdom=$ENV{"course.$ENV{'request.course.id'}.domain"};
  my $cnum=$ENV{"course.$ENV{'request.course.id'}.num"};
  my $hostver=unpack("%32C*",$Apache::lonnet::perlvar{'lonHostID'});

  my $result.='<table width=100% border=0><tr><td bgcolor=#777777>'."\n";
  $result.='<table width=100% border=0><tr><td bgcolor=#e6ffff>'."\n";
  $result.='&nbsp;<b>Verify a Submission Receipt Issued by this Server</td></tr>'."\n";
  $result.='<tr bgcolor=#ffffe6><td>'."\n";
  $result.='<form action="/adm/grades" method="post">'."\n";
  $result.='&nbsp;<tt>'.$hostver.'-<input type="text" name="receipt" size="4"></tt><br />'."\n";
  $result.='&nbsp;<input type="submit" name="submit" value="Verify Receipt">'."\n";
  $result.='<input type="hidden" name="command" value="verify">'."\n";
  if ($ENV{'form.url'}) {
      $result.='<input type="hidden" name="url" value="'.$ENV{'form.url'}.'" />';
  }
  if ($ENV{'form.symb'}) {
      $result.='<input type="hidden" name="symb" value="'.$ENV{'form.symb'}.'" />';
  }
  $result.='</form>';
  $result.='</td></tr></table>'."\n";
  $result.='</td></tr></table>'."\n";
  return $result;
}

sub viewgrades {
  my ($request) = @_;
  my $result='';

  #get resource reference
  my ($symb,$url)=&get_symb_and_url($request);
  if (!$symb) {return '';}
  #get classlist
  my ($cdom,$cnum) = split(/_/,$ENV{'request.course.id'});
  #print "Found $cdom:$cnum<br />";
  my ($classlist) = &getclasslist('all','0');
  my $headerclr = '"#ddffff"';
  my $cellclr = '"#ffffdd"';

  #get list of parts for this problem
  my (@parts) = sort(&getpartlist($url));

  $request->print ("<h2><font color=\"#339933\">Manual Grading</font></h2>");

  #start the form
  $result = '<form action="/adm/grades" method="post">'."\n".
    '<input type="hidden" name="symb" value="'.$symb.'" />'."\n".
      '<input type="hidden" name="url" value="'.$url.'" />'."\n".
	'<input type="hidden" name="command" value="editgrades" />'."\n".
	  '<input type="submit" name="submit" value="Submit Changes" />'."\n".
	    '<table border=0><tr><td bgcolor="#777777">'."\n".
	     '<table border=0>'."\n".
	      '<tr bgcolor='.$headerclr.'><td><b>Username</b></td><td><b>Fullname</b></td><td><b>Domain</b></td>'."\n";
  foreach my $part (@parts) {
     my $display=&Apache::lonnet::metadata($url,$part.'.display');
     if  (!$display) { $display = &Apache::lonnet::metadata($url,$part.'.name'); }
     $result.='<td><b>'.$display.'</b></td>'."\n";
  }
  $result.='</tr>';
  #get info for each student
  foreach my $student ( sort(@{ $$classlist{'all'} }) ) {
#    my $display=&viewstudentgrade($url,$symb,$ENV{'request.course.id'},$student,@parts);
#      print "ID=$ENV{'request.course.id'}:STU=$student:DIS=$display:<br>\n";
    $result.=&viewstudentgrade($url,$symb,$ENV{'request.course.id'},$student,@parts);
  }
  $result.='</table></td></tr></table>';
  $result.='<input type="submit" name="submit" value="Submit Changes" /></form>';
  $result.=&show_grading_menu_form($symb,$url);
  return $result;
}

sub editgrades {
  my ($request) = @_;
  my $result='';

  my $symb=$ENV{'form.symb'};
  if ($symb eq '') { $request->print("Unable to handle ambiguous references:$symb:$ENV{'form.url'}"); return ''; }
  my $url=$ENV{'form.url'};
  #get classlist
#  my ($cdom,$cnum) = split(/_/,$ENV{'request.course.id'});
  #print "Found $cdom:$cnum<br />";
  my ($classlist) = &getclasslist('all','0');

  #get list of parts for this problem
  my (@parts) = &getpartlist($url);

  $result.='<form action="/adm/grades" method="post">'."\n".
    '<input type="hidden" name="symb" value="'.$symb.'" />'."\n".
      '<input type="hidden" name="url" value="'.$url.'" />'."\n".
	'<input type="hidden" name="command" value="viewgrades" />'."\n".
	  '<input type="submit" name="submit" value="See Grades" /> <br />'."\n";

  foreach my $student ( sort(@{ $$classlist{'all'} }) ) {
    $result.=&setstudentgrade($url,$symb,$ENV{'request.course.id'},$student,@parts);
  }

  $result.='<input type="submit" name="submit" value="See Grades" /></table></form>';
  return $result;
}

sub sub_page_js {
  my $request = shift;
  $request->print(<<SUBJAVASCRIPT);
<script type="text/javascript" language="javascript">
  function updateRadio(radioButton,formtextbox,formsel,scores) {
     var pts = formtextbox.value;
     var resetbox =false;
     if (isNaN(pts) || pts < 0) {
	alert("A number equal or greater than 0 is expected. Entered value = "+pts);
	for (var i=0; i<radioButton.length; i++) {
	   if (radioButton[i].checked) {
	      formtextbox.value = i;
	      resetbox = true;
	   }
	}
	if (!resetbox) {
	   formtextbox.value = "";
	}
	return;
    }

    for (var i=0; i<radioButton.length; i++) {
	radioButton[i].checked=false;
	if (pts == i) {
	   radioButton[i].checked=true;
	}
    }
    updateSelect(formsel);
    scores.value = "0";
  }

  function writeBox(formrad,formsel,pts,scores) {
    formrad.value = pts;
    scores.value = "0";
    updateSelect(formsel,pts);
    return;
  }

  function clearRadBox(radioButton,formbox,formsel,scores) {
    for (var i=0; i<formsel.length; i++) {
	if (formsel[i].selected) {
	    var selectx=i;
	}
    }
    if (selectx == scores.value) { return };
    formbox.value = "";
    for (var i=0; i<radioButton.length; i++) {
	radioButton[i].checked=false;
    }
    scores.value = selectx;
  }

  function updateSelect(formsel) {
    formsel[0].selected = true;
    return;
  }

//===================== Show list of keywords ====================
  function keywords(keyform) {
    var keywds = keyform.value;
    var nret = prompt("Keywords list, separated by a space. Add/delete to list if desired.",keywds);
    if (nret==null) return;
    keyform.value = nret;
    return;
  }

//===================== Script to add keyword(s) ==================
  function getSel() {
    if (document.getSelection) txt = document.getSelection();
    else if (document.selection) txt = document.selection.createRange().text;
    else return;
    var cleantxt = txt.replace(new RegExp('([\\f\\n\\r\\t\\v ])+', 'g')," ");
    if (cleantxt=="") {
	alert("Select a word or group of words from document and then click this link.");
	return;
    }
    var nret = prompt("Add selection to keyword list? Edit if desired.",cleantxt);
    if (nret==null) return;
    var curlist = document.SCORE.keywords.value;
    document.SCORE.keywords.value = curlist+" "+nret;
    return;
  }

//====================== Script for composing message ==============
  function msgCenter(msgform,usrctr,fullname) {
    var Nmsg  = msgform.savemsgN.value;
    savedMsgHeader(Nmsg,usrctr,fullname);
    var subject = msgform.msgsub.value;
    var rtrchk  = eval("document.SCORE.includemsg"+usrctr);
    var msgchk = rtrchk.value;
//    alert("checked=>"+msgchk);
    re = /msgsub/;
    var shwsel = "";
    if (re.test(msgchk)) { shwsel = "checked" }
    displaySubject(subject,shwsel);
    for (var i=1; i<=Nmsg; i++) {
	var testpt = "savemsg"+i+",";
	re = /testpt/;
	shwsel = "";
	if (re.test(msgchk)) { shwsel = "checked" }
	var message = eval("document.SCORE.savemsg"+i+".value");
	displaySavedMsg(i,message,shwsel);
    }
    newmsg = eval("document.SCORE.newmsg"+usrctr+".value");
    shwsel = "";
    re = /newmsg/;
    if (re.test(msgchk)) { shwsel = "checked" }
    newMsg(newmsg,shwsel);
    msgTail(); 
    return;
  }

  function savedMsgHeader(Nmsg,usrctr,fullname) {
    var height = 30*Nmsg+250;
    var scrollbar = "no";
    if (height > 600) {
	height = 600;
	scrollbar = "yes";
    }
/*    if (window.pWin)
	window.pWin.close(); */
    pWin = window.open('', 'MessageCenter', 'toolbar=no,location=no,scrollbars='+scrollbar+',screenx=70,screeny=75,width=600,height='+height);
    pWin.document.write("<html><head>");
    pWin.document.write("<title>Message Central</title>");

    pWin.document.write("<script language=javascript>");
    pWin.document.write("function checkInput() {");
    pWin.document.write("  opener.document.SCORE.msgsub.value = document.msgcenter.msgsub.value;");
    pWin.document.write("  var nmsg   = opener.document.SCORE.savemsgN.value;");
    pWin.document.write("  var usrctr = document.msgcenter.usrctr.value;");
    pWin.document.write("  var newval = eval(\\"opener.document.SCORE.newmsg\\"+usrctr);");
    pWin.document.write("  newval.value = document.msgcenter.newmsg.value;");

    pWin.document.write("  var msgchk = \\"\\";");
    pWin.document.write("  if (document.msgcenter.subchk.checked) {");
    pWin.document.write("     msgchk = \\"msgsub,\\";");
    pWin.document.write("  }");
    pWin.document.write(   "for (var i=1; i<=nmsg; i++) {");
    pWin.document.write("      var opnmsg = eval(\\"opener.document.SCORE.savemsg\\"+i);");
    pWin.document.write("      var frmmsg = eval(\\"document.msgcenter.msg\\"+i);");
    pWin.document.write("      opnmsg.value = frmmsg.value;");
    pWin.document.write("      var chkbox = eval(\\"document.msgcenter.msgn\\"+i);");
    pWin.document.write("      if (chkbox.checked) {");
    pWin.document.write("         msgchk += \\"savemsg\\"+i+\\",\\";");
    pWin.document.write("      }");
    pWin.document.write("  }");
    pWin.document.write("  if (document.msgcenter.newmsgchk.checked) {");
    pWin.document.write("     msgchk += \\"newmsg\\"+usrctr;");
    pWin.document.write("  }");
    pWin.document.write("  var includemsg = eval(\\"opener.document.SCORE.includemsg\\"+usrctr);");
    pWin.document.write("  includemsg.value = msgchk;");

//    pWin.document.write("  alert(\\"slected=\\"+msgchk)");
    pWin.document.write("  self.close()");

    pWin.document.write("}");

    pWin.document.write("<");
    pWin.document.write("/script>");

    pWin.document.write("</head><body bgcolor=white>");

    pWin.document.write("<form action=\\"inactive\\" name=\\"msgcenter\\">");
    pWin.document.write("<input value=\\""+usrctr+"\\" name=\\"usrctr\\" type=\\"hidden\\">");
    pWin.document.write("<font color=\\"green\\" size=+1>&nbsp;Compose Message for \"+fullname+\"</font><br><br>");

    pWin.document.write("<table border=0 width=100%><tr><td bgcolor=\\"#777777\\">");
    pWin.document.write("<table border=0 width=100%><tr bgcolor=\\"#ddffff\\">");
    pWin.document.write("<td><b>Type</b></td><td><b>Include</b></td><td><b>Message</td></tr>");
}
    function displaySubject(msg,shwsel) {
    pWin.document.write("<tr bgcolor=\\"#ffffdd\\">");
    pWin.document.write("<td>Subject</td>");
    pWin.document.write("<td align=\\"center\\"><input name=\\"subchk\\" type=\\"checkbox\\"" +shwsel+"></td>");
    pWin.document.write("<td><input name=\\"msgsub\\" type=\\"text\\" value=\\""+msg+" \\"size=\\"60\\" maxlength=\\"80\\"></td></tr>");
}

function displaySavedMsg(ctr,msg,shwsel) {
    pWin.document.write("<tr bgcolor=\\"#ffffdd\\">");
    pWin.document.write("<td align=\\"center\\">"+ctr+"</td>");
    pWin.document.write("<td align=\\"center\\"><input name=\\"msgn"+ctr+"\\" type=\\"checkbox\\"" +shwsel+"></td>");
    pWin.document.write("<td><input name=\\"msg"+ctr+"\\" type=\\"text\\" value=\\""+msg+" \\" size=\\"60\\" maxlength=\\"80\\"></td></tr>");
}

  function newMsg(newmsg,shwsel) {
    pWin.document.write("<tr bgcolor=\\"#ffffdd\\">");
    pWin.document.write("<td align=\\"center\\">New</td>");
    pWin.document.write("<td align=\\"center\\"><input name=\\"newmsgchk\\" type=\\"checkbox\\"" +shwsel+"></td>");
    pWin.document.write("<td><input name=\\"newmsg\\" type=\\"text\\" onchange=\\"javascript:this.form.newmsgchk.checked=true\\" value=\\""+newmsg+" \\" size=\\"60\\" maxlength=\\"80\\"></td></tr>");
}

  function msgTail() {
    pWin.document.write("</table>");
    pWin.document.write("</td></tr></table>&nbsp;");
    pWin.document.write("<input type=\\"button\\" value=\\"Save\\" onClick=\\"javascript:checkInput()\\">&nbsp;&nbsp;");
    pWin.document.write("<input type=\\"button\\" value=\\"Cancel\\" onClick=\\"self.close()\\"><br><br>");
    pWin.document.write("</form>");
    pWin.document.write("</body></html>");
}

//====================== Script for keyword highlight options ==============
  function kwhighlight() {
    var kwclr    = document.SCORE.kwclr.value;
    var kwsize   = document.SCORE.kwsize.value;
    var kwstyle  = document.SCORE.kwstyle.value;
    var redsel = "";
    var grnsel = "";
    var blusel = "";
    if (kwclr=="red")   {var redsel="checked"};
    if (kwclr=="green") {var grnsel="checked"};
    if (kwclr=="blue")  {var blusel="checked"};
    var sznsel = "";
    var sz1sel = "";
    var sz2sel = "";
    if (kwsize=="0")  {var sznsel="checked"};
    if (kwsize=="+1") {var sz1sel="checked"};
    if (kwsize=="+2") {var sz2sel="checked"};
    var synsel = "";
    var syisel = "";
    var sybsel = "";
    if (kwstyle=="")    {var synsel="checked"};
    if (kwstyle=="<i>") {var syisel="checked"};
    if (kwstyle=="<b>") {var sybsel="checked"};
    highlightCentral();
    highlightbody('red','red',redsel,'0','normal',sznsel,'','normal',synsel);
    highlightbody('green','green',grnsel,'+1','+1',sz1sel,'<i>','italic',syisel);
    highlightbody('blue','blue',blusel,'+2','+2',sz2sel,'<b>','bold',sybsel);
    highlightend();
    return;
  }


  function highlightCentral() {
    hwdWin = window.open('', 'KeywordHighlightCentral', 'toolbar=no,location=no,scrollbars=no,width=400,height=300,screenx=100,screeny=75');
    hwdWin.document.write("<html><head>");
    hwdWin.document.write("<title>Highlight Central</title>");

    hwdWin.document.write("<script language=javascript>");
    hwdWin.document.write("function updateChoice(flag) {");
    hwdWin.document.write("  opener.document.SCORE.kwclr.value = radioSelection(document.hlCenter.kwdclr);");
    hwdWin.document.write("  opener.document.SCORE.kwsize.value = radioSelection(document.hlCenter.kwdsize);");
    hwdWin.document.write("  opener.document.SCORE.kwstyle.value = radioSelection(document.hlCenter.kwdstyle);");
    hwdWin.document.write("  if (flag==1){");
    hwdWin.document.write("     opener.document.SCORE.refresh.value = \\"on\\";");
    hwdWin.document.write("     opener.document.SCORE.submit();");
    hwdWin.document.write("   }");
    hwdWin.document.write("  self.close()");
    hwdWin.document.write("}");

    hwdWin.document.write("function radioSelection(radioButton) {");
    hwdWin.document.write("    var selection=null;");
    hwdWin.document.write("    for (var i=0; i<radioButton.length; i++) {");
    hwdWin.document.write("        if (radioButton[i].checked) {");
    hwdWin.document.write("            selection=radioButton[i].value;");
    hwdWin.document.write("            return selection;");
    hwdWin.document.write("        }");
    hwdWin.document.write("    }");
    hwdWin.document.write("}");

    hwdWin.document.write("<");
    hwdWin.document.write("/script>");

    hwdWin.document.write("</head><body bgcolor=white>");

    hwdWin.document.write("<form action=\\"inactive\\" name=\\"hlCenter\\">");
    hwdWin.document.write("<font color=\\"green\\" size=+1>&nbsp;Keyword Highlight Options</font><br><br>");

    hwdWin.document.write("<table border=0 width=100%><tr><td bgcolor=\\"#777777\\">");
    hwdWin.document.write("<table border=0 width=100%><tr bgcolor=\\"#ddffff\\">");
    hwdWin.document.write("<td><b>Text Color</b></td><td><b>Font Size</b></td><td><b>Font Style</td></tr>");
  }

  function highlightbody(clrval,clrtxt,clrsel,szval,sztxt,szsel,syval,sytxt,sysel) { 
    hwdWin.document.write("<tr bgcolor=\\"#ffffdd\\">");
    hwdWin.document.write("<td align=\\"left\\">");
    hwdWin.document.write("<input name=\\"kwdclr\\" type=\\"radio\\" value=\\""+clrval+"\\" "+clrsel+">&nbsp;"+clrtxt+"</td>");
    hwdWin.document.write("<td align=\\"left\\">");
    hwdWin.document.write("<input name=\\"kwdsize\\" type=\\"radio\\" value=\\""+szval+"\\" "+szsel+">&nbsp;"+sztxt+"</td>");
    hwdWin.document.write("<td align=\\"left\\">");
    hwdWin.document.write("<input name=\\"kwdstyle\\" type=\\"radio\\" value=\\""+syval+"\\" "+sysel+">&nbsp;"+sytxt+"</td>");
    hwdWin.document.write("</tr>");
  }

  function highlightend() { 
    hwdWin.document.write("</table>");
    hwdWin.document.write("</td></tr></table>&nbsp;");
    hwdWin.document.write("<input type=\\"button\\" value=\\"Refresh\\" onClick=\\"javascript:updateChoice(1)\\">&nbsp;&nbsp;");
    hwdWin.document.write("<input type=\\"button\\" value=\\"Set Options\\" onClick=\\"javascript:updateChoice(0)\\">&nbsp;&nbsp;");
    hwdWin.document.write("<input type=\\"button\\" value=\\"Cancel\\" onClick=\\"self.close()\\"><br><br>");
    hwdWin.document.write("</form>");
    hwdWin.document.write("</body></html>");
  }

</script>
SUBJAVASCRIPT
}

sub csvupload_javascript_reverse_associate {
  return(<<ENDPICK);
  function verify(vf) {
    var foundsomething=0;
    var founduname=0;
    var founddomain=0;
    for (i=0;i<=vf.nfields.value;i++) {
      tw=eval('vf.f'+i+'.selectedIndex');
      if (i==0 && tw!=0) { founduname=1; }
      if (i==1 && tw!=0) { founddomain=1; }
      if (i!=0 && i!=1 && tw!=0) { foundsomething=1; }
    }
    if (founduname==0 || founddomain==0) {
      alert('You need to specify at both the username and domain');
      return;
    }
    if (foundsomething==0) {
      alert('You need to specify at least one grading field');
      return;
    }
    vf.submit();
  }
  function flip(vf,tf) {
    var nw=eval('vf.f'+tf+'.selectedIndex');
    var i;
    for (i=0;i<=vf.nfields.value;i++) {
      //can not pick the same destination field for both name and domain
      if (((i ==0)||(i ==1)) && 
          ((tf==0)||(tf==1)) && 
          (i!=tf) &&
          (eval('vf.f'+i+'.selectedIndex')==nw)) {
        eval('vf.f'+i+'.selectedIndex=0;')
      }
    }
  }
ENDPICK
}

sub csvupload_javascript_forward_associate {
  return(<<ENDPICK);
  function verify(vf) {
    var foundsomething=0;
    var founduname=0;
    var founddomain=0;
    for (i=0;i<=vf.nfields.value;i++) {
      tw=eval('vf.f'+i+'.selectedIndex');
      if (tw==1) { founduname=1; }
      if (tw==2) { founddomain=1; }
      if (tw>2) { foundsomething=1; }
    }
    if (founduname==0 || founddomain==0) {
      alert('You need to specify at both the username and domain');
      return;
    }
    if (foundsomething==0) {
      alert('You need to specify at least one grading field');
      return;
    }
    vf.submit();
  }
  function flip(vf,tf) {
    var nw=eval('vf.f'+tf+'.selectedIndex');
    var i;
    //can not pick the same destination field twice
    for (i=0;i<=vf.nfields.value;i++) {
      if ((i!=tf) && (eval('vf.f'+i+'.selectedIndex')==nw)) {
        eval('vf.f'+i+'.selectedIndex=0;')
      }
    }
  }
ENDPICK
}

sub csvuploadmap_header {
  my ($request,$symb,$url,$datatoken,$distotal)= @_;
  my $result;
  my $javascript;
  if ($ENV{'form.upfile_associate'} eq 'reverse') {
    $javascript=&csvupload_javascript_reverse_associate();
  } else {
    $javascript=&csvupload_javascript_forward_associate();
  }
  $request->print(<<ENDPICK);
<form method="post" enctype="multipart/form-data" action="/adm/grades" name="gradesupload">
<h3>Uploading Class Grades for resource $url</h3>
<hr>
<h3>Identify fields</h3>
Total number of records found in file: $distotal <hr />
Enter as many fields as you can. The system will inform you and bring you back
to this page if the data selected is insufficient to run your class.<hr />
<input type="button" value="Reverse Association" onClick="javascript:this.form.associate.value='Reverse Association';submit(this.form);" />
<input type="hidden" name="associate"  value="" />
<input type="hidden" name="phase"      value="three" />
<input type="hidden" name="datatoken"  value="$datatoken" />
<input type="hidden" name="fileupload" value="$ENV{'form.fileupload'}" />
<input type="hidden" name="upfiletype" value="$ENV{'form.upfiletype'}" />
<input type="hidden" name="upfile_associate" 
                                       value="$ENV{'form.upfile_associate'}" />
<input type="hidden" name="symb"       value="$symb" />
<input type="hidden" name="url"        value="$url" />
<input type="hidden" name="command"    value="csvuploadassign" />
<hr />
<script type="text/javascript" language="Javascript">
$javascript
</script>
ENDPICK
  return '';

}

sub csvupload_fields {
  my ($url) = @_;
  my (@parts) = &getpartlist($url);
  my @fields=(['username','Student Username'],['domain','Student Domain']);
  foreach my $part (sort(@parts)) {
    my @datum;
    my $display=&Apache::lonnet::metadata($url,$part.'.display');
    my $name=$part;
    if  (!$display) { $display = $name; }
    @datum=($name,$display);
    push(@fields,\@datum);
  }
  return (@fields);
}

sub csvuploadmap_footer {
  my ($request,$i,$keyfields) =@_;
  $request->print(<<ENDPICK);
</table>
<input type="hidden" name="nfields" value="$i" />
<input type="hidden" name="keyfields" value="$keyfields" />
<input type="button" onClick="javascript:verify(this.form)" value="Assign Grades" /><br />
</form>
ENDPICK
}

sub csvuploadmap {
  my ($request)= @_;
  my ($symb,$url)=&get_symb_and_url($request);
  if (!$symb) {return '';}
  my $datatoken;
  if (!$ENV{'form.datatoken'}) {
    $datatoken=&Apache::loncommon::upfile_store($request);
  } else {
    $datatoken=$ENV{'form.datatoken'};
    &Apache::loncommon::load_tmp_file($request);
  }
  my @records=&Apache::loncommon::upfile_record_sep();
  &csvuploadmap_header($request,$symb,$url,$datatoken,$#records+1);
  my $i;
  my $keyfields;
  if (@records) {
    my @fields=&csvupload_fields($url);
    if ($ENV{'form.upfile_associate'} eq 'reverse') {	
      &Apache::loncommon::csv_print_samples($request,\@records);
      $i=&Apache::loncommon::csv_print_select_table($request,\@records,
						    \@fields);
      foreach (@fields) { $keyfields.=$_->[0].','; }
      chop($keyfields);
    } else {
      unshift(@fields,['none','']);
      $i=&Apache::loncommon::csv_samples_select_table($request,\@records,
						      \@fields);
      my %sone=&Apache::loncommon::record_sep($records[0]);
      $keyfields=join(',',sort(keys(%sone)));
    }
  }
  &csvuploadmap_footer($request,$i,$keyfields);
  return '';
}

sub csvuploadassign {
  my ($request)= @_;
  my ($symb,$url)=&get_symb_and_url($request);
  if (!$symb) {return '';}
  &Apache::loncommon::load_tmp_file($request);
  my @gradedata=&Apache::loncommon::upfile_record_sep();
  my @keyfields = split(/\,/,$ENV{'form.keyfields'});
  my %fields=();
  for (my $i=0; $i<=$ENV{'form.nfields'}; $i++) {
    if ($ENV{'form.upfile_associate'} eq 'reverse') {
      if ($ENV{'form.f'.$i} ne 'none') {
	$fields{$keyfields[$i]}=$ENV{'form.f'.$i};
      }
    } else {
      if ($ENV{'form.f'.$i} ne 'none') {
	$fields{$ENV{'form.f'.$i}}=$keyfields[$i];
      }
    }
  }
  $request->print('<h3>Assigning Grades</h3>');
  my $courseid=$ENV{'request.course.id'};
#  my $cdom=$ENV{"course.$courseid.domain"};
#  my $cnum=$ENV{"course.$courseid.num"};
  my ($classlist) = &getclasslist('all','1');
  my @skipped;
  my $countdone=0;
  foreach my $grade (@gradedata) {
    my %entries=&Apache::loncommon::record_sep($grade);
    my $username=$entries{$fields{'username'}};
    my $domain=$entries{$fields{'domain'}};
    if (!exists($$classlist{"$username:$domain"})) {
      push(@skipped,"$username:$domain");
      next;
    }
    my %grades;
    foreach my $dest (keys(%fields)) {
      if ($dest eq 'username' || $dest eq 'domain') { next; }
      if ($entries{$fields{$dest}} eq '') { next; }
      my $store_key=$dest;
      $store_key=~s/^stores/resource/;
      $store_key=~s/_/\./g;
      $grades{$store_key}=$entries{$fields{$dest}};
    }
    $grades{"resource.regrader"}="$ENV{'user.name'}:$ENV{'user.domain'}";
    &Apache::lonnet::cstore(\%grades,$symb,$ENV{'request.course.id'},
			    $domain,$username);
    $request->print('.');
    $request->rflush();
    $countdone++;
  }
  $request->print("<br />Stored $countdone students\n");
  if (@skipped) {
    $request->print('<br /><font size="+1"><b>Skipped Students</b></font><br />');
    foreach my $student (@skipped) { $request->print("<br />$student"); }
  }
  $request->print(&view_edit_entire_class_form($symb,$url));
  $request->print(&show_grading_menu_form($symb,$url));
  return '';
}

sub send_header {
  my ($request)= @_;
  $request->print(&Apache::lontexconvert::header());
#  $request->print("
#<script>
#remotewindow=open('','homeworkremote');
#remotewindow.close();
#</script>"); 
  $request->print('<body bgcolor="#FFFFFF">');
}

sub send_footer {
  my ($request)= @_;
  $request->print('</body>');
  $request->print(&Apache::lontexconvert::footer());
}

sub handler {
  my $request=$_[0];

  if ($ENV{'browser.mathml'}) {
    $request->content_type('text/xml');
  } else {
    $request->content_type('text/html');
  }
  $request->send_http_header;
  return OK if $request->header_only;
  &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
  my $url=$ENV{'form.url'};
  my $symb=$ENV{'form.symb'};
  my $command=$ENV{'form.command'};
  if (!$url) {
    my ($temp1,$temp2);
    ($temp1,$temp2,$ENV{'form.url'})=split(/___/,$symb);
    $url = $ENV{'form.url'};
  }
  &send_header($request);
  if ($url eq '' && $symb eq '') {
     if ($ENV{'user.adv'}) {
         if (($ENV{'form.codeone'}) && ($ENV{'form.codetwo'}) &&
             ($ENV{'form.codethree'})) {
             my $token=$ENV{'form.codeone'}.'*'.$ENV{'form.codetwo'}.'*'.
		        $ENV{'form.codethree'};
             my ($tsymb,$tuname,$tudom,$tcrsid)=
		 &Apache::lonnet::checkin($token);
             if ($tsymb) {
                my ($map,$id,$url)=split(/\_\_\_/,$tsymb);
                if (&Apache::lonnet::allowed('mgr',$tcrsid)) {
                   $request->print(
                     &Apache::lonnet::ssi('/res/'.$url,
                        ('grade_username' => $tuname,
                         'grade_domain' => $tudom,
                         'grade_courseid' => $tcrsid,
                         'grade_symb' => $tsymb)));
                } else {
                   $request->print('<h1>Not authorized: '.$token.'</h1>');
                }           
	    } else {
                $request->print('<h1>Not a valid DocID: '.$token.'</h1>');
            }
	 } else {
             $request->print(&Apache::lonxml::tokeninputfield());
         }
     }
  } else {
    #&Apache::lonhomework::showhashsubset(\%ENV,'^form');
    $Apache::grades::viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
    if ($command eq 'submission') {
      &listStudents($request) if ($ENV{'form.student'} eq '');
      &submission($request,0,0) if ($ENV{'form.student'} ne '');
    } elsif ($command eq 'processGroup') {
      &processGroup($request);
    } elsif ($command eq 'gradingmenu') {
      $request->print(&gradingmenu($request));
    } elsif ($command eq 'viewgrades') {
      $request->print(&viewgrades($request));
    } elsif ($command eq 'handgrade') {
      $request->print(&processHandGrade($request));
    } elsif ($command eq 'editgrades') {
      $request->print(&editgrades($request));
    } elsif ($command eq 'verify') {
      $request->print(&verifyreceipt($request));
    } elsif ($command eq 'csvupload') {
      $request->print(&csvupload($request));
    } elsif ($command eq 'viewclasslist') {
      $request->print(&viewclasslist($request));
    } elsif ($command eq 'csvuploadmap') {
      $request->print(&csvuploadmap($request));
#    } elsif ($command eq 'receiptInput') {
#      &receiptInput($request);
    } elsif ($command eq 'csvuploadassign') {
      if ($ENV{'form.associate'} ne 'Reverse Association') {
	$request->print(&csvuploadassign($request));
      } else {
	if ( $ENV{'form.upfile_associate'} ne 'reverse' ) {
	  $ENV{'form.upfile_associate'} = 'reverse';
	} else {
	  $ENV{'form.upfile_associate'} = 'forward';
	}
	$request->print(&csvuploadmap($request));
      }
    } else {
      $request->print("Unknown action: $command:");
    }
  }
  &send_footer($request);
  return OK;
}

1;

__END__;