File:  [LON-CAPA] / loncom / homework / grades.pm
Revision 1.219: download - view: text, annotated - select for diffs
Wed Sep 29 15:04:50 2004 UTC (19 years, 6 months ago) by www
Branches: MAIN
CVS tags: HEAD
Same as Bug #3449 - document.open does not work on Safari

# The LearningOnline Network with CAPA
# The LON-CAPA Grading handler
#
# $Id: grades.pm,v 1.219 2004/09/29 15:04:50 www Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#

package Apache::grades;
use strict;
use Apache::style;
use Apache::lonxml;
use Apache::lonnet;
use Apache::loncommon;
use Apache::lonhtmlcommon;
use Apache::lonnavmaps;
use Apache::lonhomework;
use Apache::loncoursedata;
use Apache::lonmsg qw(:user_normal_msg);
use Apache::Constants qw(:common);
use Apache::lonlocal;
use String::Similarity;

my %oldessays=();
my %perm=();

# ----- These first few routines are general use routines.----
#
# --- Retrieve the parts from the metadata file.---
sub getpartlist {
    my ($url,$symb) = @_;
    my $partorder = &Apache::lonnet::metadata($url, 'partorder');
    my @parts;
    if ($partorder) {
	for my $part (split (/,/,$partorder)) {
	    if (!&Apache::loncommon::check_if_partid_hidden($part,$symb)) {
		push(@parts, $part);
	    }
	}	    
    } else {
	my $metadata = &Apache::lonnet::metadata($url, 'packages');
	foreach (split(/\,/,$metadata)) {
	    if ($_ =~ /^part_(.*)$/) {
		if (!&Apache::loncommon::check_if_partid_hidden($1,$symb)) {
		    push(@parts, $1);
		}
	    }
	}
    }
    my @stores;
    foreach my $part (@parts) {
	my (@metakeys) = split(/,/,&Apache::lonnet::metadata($url,'keys'));
	foreach my $key (@metakeys) {
	    if ($key =~ m/^stores_\Q$part\E_/) { push(@stores,$key); }
	}
    }
    return @stores;
}

# --- Get the symbolic name of a problem and the url
sub get_symb_and_url {
    my ($request,$silent) = @_;
    (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 ($symb eq '') { 
	if (!$silent) {
	    $request->print("Unable to handle ambiguous references:$url:.");
	    return ();
	}
    }
    return ($symb,$url);
}

# --- Retrieve the fullname for a user. Return lastname, first middle ---
# --- Generation is attached next to the lastname if it exists. ---
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) {
        $fullname = &Apache::loncoursedata::ProcessFullName
            (@name{qw/lastname generation firstname middlename/});
    } else {
        &Apache::lonnet::logthis('grades.pm: no name data for '.$uname.
                                 '@'.$udom.':'.$tmp);
    }
    return $fullname;
}

#--- Format fullname, username:domain if different for display
#--- Use anywhere where the student names are listed
sub nameUserString {
    my ($type,$fullname,$uname,$udom) = @_;
    if ($type eq 'header') {
	return '<b>&nbsp;Fullname&nbsp;</b><font color="#999999">(Username)</font>&nbsp;';
    } else {
	return '&nbsp;'.$fullname.'<font color="#999999">&nbsp;('.$uname.
	    ($ENV{'user.domain'} eq $udom ? '' : ' ('.$udom.')').')</font>';
    }
}

#--- Get the partlist and the response type for a given problem. ---
#--- Indicate if a response type is coded handgraded or not. ---
sub response_type {
    my ($url,$symb) = shift;
    $symb=($ENV{'form.symb'} ne '' ? $ENV{'form.symb'} : (&Apache::lonnet::symbread($url))) if ($symb eq '');
    my $allkeys = &Apache::lonnet::metadata($url,'keys');
    my %vPart;
    foreach my $partid (&Apache::loncommon::get_env_multiple('form.vPart')) {
	$vPart{$partid}=1;
    }
    my %seen = ();
    my (@partlist,%handgrade,%responseType);
    foreach (split(/,/,&Apache::lonnet::metadata($url,'packages'))) {
	if (/^\w+response_.*/) {
	    my ($responsetype,$part) = split(/_/,$_,2);
	    my ($partid,$respid) = split(/_/,$part);
	    if (&Apache::loncommon::check_if_partid_hidden($partid,$symb)) {
		next;
	    }
	    if (%vPart && !exists($vPart{$partid})) {
		next;
	    }
	    $responsetype =~ s/response$//; # make it compatible w/ navmaps - should move to that!!
	    my ($value) = &Apache::lonnet::EXT('resource.'.$part.'.handgrade',$symb);
	    $handgrade{$part} = ($value eq 'yes' ? 'yes' : 'no'); 
	    if (!exists($responseType{$partid})) { $responseType{$partid}={}; }
	    $responseType{$partid}->{$respid}=$responsetype;
	    next if ($seen{$partid} > 0);
	    $seen{$partid}++;
	    push @partlist,$partid;
	}
    }
    return \@partlist,\%handgrade,\%responseType;
}

sub get_display_part {
    my ($partID,$url,$symb)=@_;
    if (!defined($symb) || $symb eq '') {
	$symb=$ENV{'form.symb'};
	if ($symb eq '') { $symb=&Apache::lonnet::symbread($url) }
    }
    my $display=&Apache::lonnet::EXT('resource.'.$partID.'.display',$symb);
    if (defined($display) and $display ne '') {
	$display.= " (<font color=\"#999900\">id $partID</font>)";
    } else {
	$display=$partID;
    }
    return $display;
}
#--- Show resource title
#--- and parts and response type
sub showResourceInfo {
    my ($url,$probTitle,$checkboxes) = @_;
    my $col=3;
    if ($checkboxes) { $col=4; }
    my $result ='<table border="0">'.
	'<tr><td colspan="'.$col.'"><font size="+1"><b>'.&mt('Current Resource').': </b>'.
	$probTitle.'</font></td></tr>'."\n";
    my ($partlist,$handgrade,$responseType) = &response_type($url);
    my %resptype = ();
    my $hdgrade='no';
    my %partsseen;
    for my $part_resID (sort keys(%$handgrade)) {
	my $handgrade=$$handgrade{$part_resID};
	my ($partID,$resID) = split(/_/,$part_resID);
	my $responsetype = $responseType->{$partID}->{$resID};
	$hdgrade = $handgrade if ($handgrade eq 'yes');
	$result.='<tr>';
	if ($checkboxes) {
	    if (exists($partsseen{$partID})) {
		$result.="<td>&nbsp;</td>";
	    } else {
		$result.="<td><input type='checkbox' name='vPart' value='$partID' checked='on' /></td>";
	    }
	    $partsseen{$partID}=1;
	}
	my $display_part=&get_display_part($partID,$url);
	$result.='<td><b>Part: </b>'.$display_part.' <font color="#999999">'.
	    $resID.'</font></td>'.
	    '<td><b>Type: </b>'.$responsetype.'</td></tr>';
#	    '<td><b>Handgrade: </b>'.$handgrade.'</td></tr>';
    }
    $result.='</table>'."\n";
    return $result,$responseType,$hdgrade,$partlist,$handgrade;
}


sub get_order {
    my ($partid,$respid,$symb,$uname,$udom)=@_;
    my (undef,undef,$url)=&Apache::lonnet::decode_symb($symb);
    $url=&Apache::lonnet::clutter($url);
    my $subresult=&Apache::lonnet::ssi($url,
				       ('grade_target' => 'analyze'),
				       ('grade_domain' => $udom),
				       ('grade_symb' => $symb),
				       ('grade_courseid' => 
					        $ENV{'request.course.id'}),
				       ('grade_username' => $uname));
    (undef,$subresult)=split(/_HASH_REF__/,$subresult,2);
    my %analyze=&Apache::lonnet::str2hash($subresult);
    return ($analyze{"$partid.$respid.shown"});
}
#--- Clean response type for display
#--- Currently filters option/rank/radiobutton/match/essay response types only.
sub cleanRecord {
    my ($answer,$response,$symb,$partid,$respid,$record,$order,$version) = @_;
    my $grayFont = '<font color="#999999">';
    if ($response =~ /^(option|rank)$/) {
	my %answer=&Apache::lonnet::str2hash($answer);
	my %grading=&Apache::lonnet::str2hash($record->{$version."resource.$partid.$respid.submissiongrading"});
	my ($toprow,$bottomrow);
	foreach my $foil (@$order) {
	    if ($grading{$foil} == 1) {
		$toprow.='<td><b>'.$answer{$foil}.'&nbsp;</b></td>';
	    } else {
		$toprow.='<td><i>'.$answer{$foil}.'&nbsp;</i></td>';
	    }
	    $bottomrow.='<td>'.$grayFont.$foil.'</font>&nbsp;</td>';
	}
	return '<blockquote><table border="1">'.
	    '<tr valign="top"><td>Answer</td>'.$toprow.'</tr>'.
	    '<tr valign="top"><td>'.$grayFont.'Option ID</font></td>'.
	    $grayFont.$bottomrow.'</tr>'.'</table></blockquote>';
    } elsif ($response eq 'match') {
	my %answer=&Apache::lonnet::str2hash($answer);
	my %grading=&Apache::lonnet::str2hash($record->{$version."resource.$partid.$respid.submissiongrading"});
	my @items=&Apache::lonnet::str2array($record->{$version."resource.$partid.$respid.submissionitems"});
	my ($toprow,$middlerow,$bottomrow);
	foreach my $foil (@$order) {
	    my $item=shift(@items);
	    if ($grading{$foil} == 1) {
		$toprow.='<td><b>'.$item.'&nbsp;</b></td>';
		$middlerow.='<td><b>'.$grayFont.$answer{$foil}.'&nbsp;</font></b></td>';
	    } else {
		$toprow.='<td><i>'.$item.'&nbsp;</i></td>';
		$middlerow.='<td><i>'.$grayFont.$answer{$foil}.'&nbsp;</font></i></td>';
	    }
	    $bottomrow.='<td>'.$grayFont.$foil.'</font>&nbsp;</td>';
	}
	return '<blockquote><table border="1">'.
	    '<tr valign="top"><td>Answer</td>'.$toprow.'</tr>'.
	    '<tr valign="top"><td>'.$grayFont.'Item ID</font></td>'.
	    $middlerow.'</tr>'.
	    '<tr valign="top"><td>'.$grayFont.'Option ID</font></td>'.
	    $bottomrow.'</tr>'.'</table></blockquote>';
    } elsif ($response eq 'radiobutton') {
	my %answer=&Apache::lonnet::str2hash($answer);
	my ($toprow,$bottomrow);
	my $correct=($order->[0])+1;
	for (my $i=1;$i<=$#$order;$i++) {
	    my $foil=$order->[$i];
	    if (exists($answer{$foil})) {
		if ($i == $correct) {
		    $toprow.='<td><b>true</b></td>';
		} else {
		    $toprow.='<td><i>true</i></td>';
		}
	    } else {
		$toprow.='<td>false</td>';
	    }
	    $bottomrow.='<td>'.$grayFont.$foil.'</font>&nbsp;</td>';
	}
	return '<blockquote><table border="1">'.
	    '<tr valign="top"><td>Answer</td>'.$toprow.'</tr>'.
	    '<tr valign="top"><td>'.$grayFont.'Option ID</font></td>'.
	    $grayFont.$bottomrow.'</tr>'.'</table></blockquote>';
    } elsif ($response eq 'essay') {
	if (! exists ($ENV{'form.'.$symb})) {
	    my (%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'} : '';
	    $ENV{'form.'.$symb} = 1; # so that we don't have to read it from disk for multiple sub of the same prob.
	}
	$answer =~ s-\n-<br />-g;
	return '<br /><br /><blockquote><tt>'.&keywords_highlight($answer).'</tt></blockquote>';
    }
    return $answer;
}

#-- A couple of common js functions
sub commonJSfunctions {
    my $request = shift;
    $request->print(<<COMMONJSFUNCTIONS);
<script type="text/javascript" language="javascript">
    function radioSelection(radioButton) {
	var selection=null;
	if (radioButton.length > 1) {
	    for (var i=0; i<radioButton.length; i++) {
		if (radioButton[i].checked) {
		    return radioButton[i].value;
		}
	    }
	} else {
	    if (radioButton.checked) return radioButton.value;
	}
	return selection;
    }

    function pullDownSelection(selectOne) {
	var selection="";
	if (selectOne.length > 1) {
	    for (var i=0; i<selectOne.length; i++) {
		if (selectOne[i].selected) {
		    return selectOne[i].value;
		}
	    }
	} else {
            // only one value it must be the selected one
	    return selectOne.value;
	}
    }
</script>
COMMONJSFUNCTIONS
}

#--- Dumps the class list with usernames,list of sections,
#--- section, ids and fullnames for each user.
sub getclasslist {
    my ($getsec,$filterlist) = @_;
    $getsec = $getsec eq '' ? 'all' : $getsec;
    my $classlist=&Apache::loncoursedata::get_classlist();
    # Bail out if we were unable to get the classlist
    return if (! defined($classlist));
    #
    my %sections;
    my %fullnames;
    foreach my $student (keys(%$classlist)) {
        my $end      = 
            $classlist->{$student}->[&Apache::loncoursedata::CL_END()];
        my $start    = 
            $classlist->{$student}->[&Apache::loncoursedata::CL_START()];
        my $id       = 
            $classlist->{$student}->[&Apache::loncoursedata::CL_ID()];
        my $section  = 
            $classlist->{$student}->[&Apache::loncoursedata::CL_SECTION()];
        my $fullname = 
            $classlist->{$student}->[&Apache::loncoursedata::CL_FULLNAME()];
        my $status   = 
            $classlist->{$student}->[&Apache::loncoursedata::CL_STATUS()];
	# filter students according to status selected
	if ($filterlist && $ENV{'form.Status'} ne 'Any') {
	    if ($ENV{'form.Status'} ne $status) {
		delete ($classlist->{$student});
		next;
	    }
	}
	$section = ($section ne '' ? $section : 'none');
	if (&canview($section)) {
	    if ($getsec eq 'all' || $getsec eq $section) {
		$sections{$section}++;
		$fullnames{$student}=$fullname;
	    } else {
		delete($classlist->{$student});
	    }
	} else {
	    delete($classlist->{$student});
	}
    }
    my %seen = ();
    my @sections = sort(keys(%sections));
    return ($classlist,\@sections,\%fullnames);
}

sub canmodify {
    my ($sec)=@_;
    if ($perm{'mgr'}) {
	if (!defined($perm{'mgr_section'})) {
	    # can modify whole class
	    return 1;
	} else {
	    if ($sec eq $perm{'mgr_section'}) {
		#can modify the requested section
		return 1;
	    } else {
		# can't modify the request section
		return 0;
	    }
	}
    }
    #can't modify
    return 0;
}

sub canview {
    my ($sec)=@_;
    if ($perm{'vgr'}) {
	if (!defined($perm{'vgr_section'})) {
	    # can modify whole class
	    return 1;
	} else {
	    if ($sec eq $perm{'vgr_section'}) {
		#can modify the requested section
		return 1;
	    } else {
		# can't modify the request section
		return 0;
	    }
	}
    }
    #can't modify
    return 0;
}

#--- Retrieve the grade status of a student for all the parts
sub student_gradeStatus {
    my ($url,$symb,$udom,$uname,$partlist) = @_;
    my %record     = &Apache::lonnet::restore($symb,$ENV{'request.course.id'},$udom,$uname);
    my %partstatus = ();
    foreach (@$partlist) {
	my ($status,undef)   = split(/_/,$record{"resource.$_.solved"},2);
	$status              = 'nothing' if ($status eq '');
	$partstatus{$_}      = $status;
	my $subkey           = "resource.$_.submitted_by";
	$partstatus{$subkey} = $record{$subkey} if ($record{$subkey} ne '');
    }
    return %partstatus;
}

# hidden form and javascript that calls the form
# Use by verifyscript and viewgrades
# Shows a student's view of problem and submission
sub jscriptNform {
    my ($url,$symb) = @_;
    my $jscript='<script type="text/javascript" language="javascript">'."\n".
	'    function viewOneStudent(user,domain) {'."\n".
	'	document.onestudent.student.value = user;'."\n".
	'	document.onestudent.userdom.value = domain;'."\n".
	'	document.onestudent.submit();'."\n".
	'    }'."\n".
	'</script>'."\n";
    $jscript.= '<form action="/adm/grades" method="post" name="onestudent">'."\n".
	'<input type="hidden" name="symb"    value="'.$symb.'" />'."\n".
	'<input type="hidden" name="url"     value="'.$url.'" />'."\n".
	'<input type="hidden" name="saveState" value="'.$ENV{'form.saveState'}.'" />'."\n".
	'<input type="hidden" name="probTitle" value="'.$ENV{'form.probTitle'}.'" />'."\n".
	'<input type="hidden" name="Status"  value="'.$ENV{'form.Status'}.'" />'."\n".
	'<input type="hidden" name="command" value="submission" />'."\n".
	'<input type="hidden" name="student" value="" />'."\n".
	'<input type="hidden" name="userdom" value="" />'."\n".
	'</form>'."\n";
    return $jscript;
}

#------------------ End of general use routines --------------------

#
# Find most similar essay
#

sub most_similar {
    my ($uname,$udom,$uessay)=@_;

# ignore spaces and punctuation

    $uessay=~s/\W+/ /gs;

# these will be returned. Do not care if not at least 50 percent similar
    my $limit=0.6;
    my $sname='';
    my $sdom='';
    my $scrsid='';
    my $sessay='';
# go through all essays ...
    foreach my $tkey (keys %oldessays) {
	my ($tname,$tdom,$tcrsid)=split(/\./,$tkey);
# ... except the same student
        if (($tname ne $uname) || ($tdom ne $udom)) {
	    my $tessay=$oldessays{$tkey};
            $tessay=~s/\W+/ /gs;
# String similarity gives up if not even limit
            my $tsimilar=&String::Similarity::similarity($uessay,$tessay,$limit);
# Found one
            if ($tsimilar>$limit) {
		$limit=$tsimilar;
                $sname=$tname;
                $sdom=$tdom;
                $scrsid=$tcrsid;
                $sessay=$oldessays{$tkey};
            }
        } 
    }
    if ($limit>0.6) {
       return ($sname,$sdom,$scrsid,$sessay,$limit);
    } else {
       return ('','','','',0);
    }
}

#-------------------------------------------------------------------

#------------------------------------ Receipt Verification Routines
#
#--- Check whether a receipt number is valid.---
sub verifyreceipt {
    my $request  = shift;

    my $courseid = $ENV{'request.course.id'};
    my $receipt  = &Apache::lonnet::recprefix($courseid).'-'.
	$ENV{'form.receipt'};
    $receipt     =~ s/[^\-\d]//g;
    my $url      = $ENV{'form.url'};
    my $symb     = $ENV{'form.symb'};
    unless ($symb) {
	$symb    = &Apache::lonnet::symbread($url);
    }

    my $title.='<h3><font color="#339933">Verifying Submission Receipt '.
	$receipt.'</h3></font>'."\n".
	'<font size=+1><b>Resource: </b>'.$ENV{'form.probTitle'}.'</font><br><br>'."\n";

    my ($string,$contents,$matches) = ('','',0);
    my (undef,undef,$fullname) = &getclasslist('all','0');
    
    my $receiptparts=0;
    if ($ENV{"course.$courseid.receiptalg"} eq 'receipt2') { $receiptparts=1; }
    my $parts=['0'];
    if ($receiptparts) { ($parts)=&response_type($url,$symb); }
    foreach (sort {lc($$fullname{$a}) cmp lc($$fullname{$b}) } keys %$fullname) {
	my ($uname,$udom)=split(/\:/);
	foreach my $part (@$parts) {
	    if ($receipt eq &Apache::lonnet::ireceipt($uname,$udom,$courseid,$symb,$part)) {
		$contents.='<tr bgcolor="#ffffe6"><td>&nbsp;'."\n".
		    '<a href="javascript:viewOneStudent(\''.$uname.'\',\''.$udom.
		    '\')"; TARGET=_self>'.$$fullname{$_}.'</a>&nbsp;</td>'."\n".
		    '<td>&nbsp;'.$uname.'&nbsp;</td>'.
		    '<td>&nbsp;'.$udom.'&nbsp;</td>';
		if ($receiptparts) {
		    $contents.='<td>&nbsp;'.$part.'&nbsp;</td>';
		}
		$contents.='</tr>'."\n";
		
		$matches++;
	    }
	}
    }
    if ($matches == 0) {
	$string = $title.'No match found for the above receipt.';
    } else {
	$string = &jscriptNform($url,$symb).$title.
	    'The above receipt matches the following student'.
	    ($matches <= 1 ? '.' : 's.')."\n".
	    '<table border="0"><tr><td bgcolor="#777777">'."\n".
	    '<table border="0"><tr bgcolor="#e6ffff">'."\n".
	    '<td><b>&nbsp;Fullname&nbsp;</b></td>'."\n".
	    '<td><b>&nbsp;Username&nbsp;</b></td>'."\n".
	    '<td><b>&nbsp;Domain&nbsp;</b></td>';
	if ($receiptparts) {
	    $string.='<td>&nbsp;Problem Part&nbsp;</td>';
	}
	$string.='</tr>'."\n".$contents.
	    '</table></td></tr></table>'."\n";
    }
    return $string.&show_grading_menu_form($symb,$url);
}

#--- This is called by a number of programs.
#--- Called from the Grading Menu - View/Grade an individual student
#--- Also called directly when one clicks on the subm button 
#    on the problem page.
sub listStudents {
    my ($request) = shift;

    my ($symb,$url) = &get_symb_and_url($request);
    my $cdom      = $ENV{"course.$ENV{'request.course.id'}.domain"};
    my $cnum      = $ENV{"course.$ENV{'request.course.id'}.num"};
    my $getsec    = $ENV{'form.section'} eq '' ? 'all' : $ENV{'form.section'};
    my $submitonly= $ENV{'form.submitonly'} eq '' ? 'all' : $ENV{'form.submitonly'};

    my $viewgrade = $ENV{'form.showgrading'} eq 'yes' ? 'View/Grade/Regrade' : 'View';
    $ENV{'form.probTitle'} = $ENV{'form.probTitle'} eq '' ? 
	&Apache::lonnet::gettitle($symb) : $ENV{'form.probTitle'};

    my $result='<h3><font color="#339933">&nbsp;'.$viewgrade.
	' Submissions for a Student or a Group of Students</font></h3>';

    my ($table,undef,$hdgrade,$partlist,$handgrade) = &showResourceInfo($url,$ENV{'form.probTitle'},($ENV{'form.showgrading'} eq 'yes'));

    $request->print(<<LISTJAVASCRIPT);
<script type="text/javascript" language="javascript">
    function checkSelect(checkBox) {
	var ctr=0;
	var sense="";
	if (checkBox.length > 1) {
	    for (var i=0; i<checkBox.length; i++) {
		if (checkBox[i].checked) {
		    ctr++;
		}
	    }
	    sense = "a student or group of students";
	} else {
	    if (checkBox.checked) {
		ctr = 1;
	    }
	    sense = "the student";
	}
	if (ctr == 0) {
	    alert("Please select "+sense+" before clicking on the Next button.");
	    return false;
	}
	document.gradesub.submit();
    }

    function reLoadList(formname) {
	if (formname.saveStatusOld.value == pullDownSelection(formname.Status)) {return;}
	formname.command.value = 'submission';
	formname.submit();
    }
</script>
LISTJAVASCRIPT

    &commonJSfunctions($request);
    $request->print($result);

    my $checkhdgrade = ($ENV{'form.handgrade'} eq 'yes' && scalar(@$partlist) > 1 ) ? 'checked' : '';
    my $checklastsub = $checkhdgrade eq '' ? 'checked' : '';
    my $gradeTable='<form action="/adm/grades" method="post" name="gradesub">'.
	"\n".$table.
	'&nbsp;<b>View Problem Text: </b><input type="radio" name="vProb" value="no" checked="on" /> no '."\n".
	'<input type="radio" name="vProb" value="yes" /> one student '."\n".
	'<input type="radio" name="vProb" value="all" /> all students <br />'."\n".
	'&nbsp;<b>View Answer: </b><input type="radio" name="vAns" value="no"  /> no '."\n".
	'<input type="radio" name="vAns" value="yes" /> one student '."\n".
	'<input type="radio" name="vAns" value="all" checked="on" /> all students <br />'."\n".
	'&nbsp;<b>Submissions: </b>'."\n";
    if ($ENV{'form.handgrade'} eq 'yes' && scalar(@$partlist) > 1) {
	$gradeTable.='<input type="radio" name="lastSub" value="hdgrade" '.$checkhdgrade.' /> essay part only'."\n";
    }

    my $saveStatus = $ENV{'form.Status'} eq '' ? 'Active' : $ENV{'form.Status'};
    $ENV{'form.Status'} = $saveStatus;

    $gradeTable.='<input type="radio" name="lastSub" value="lastonly" '.$checklastsub.' /> last submission only'."\n".
	'<input type="radio" name="lastSub" value="last" /> last submission & parts info'."\n".
	'<input type="radio" name="lastSub" value="datesub" /> by dates and submissions'."\n".
	'<input type="radio" name="lastSub" value="all" /> all details'."\n".
	'<input type="hidden" name="section"     value="'.$getsec.'" />'."\n".
	'<input type="hidden" name="submitonly"  value="'.$submitonly.'" />'."\n".
	'<input type="hidden" name="handgrade"   value="'.$ENV{'form.handgrade'}.'" /><br />'."\n".
	'<input type="hidden" name="showgrading" value="'.$ENV{'form.showgrading'}.'" /><br />'."\n".
	'<input type="hidden" name="saveState"   value="'.$ENV{'form.saveState'}.'" />'."\n".
	'<input type="hidden" name="probTitle"   value="'.$ENV{'form.probTitle'}.'" />'."\n".
	'<input type="hidden" name="url"  value="'.$url.'" />'."\n".
	'<input type="hidden" name="symb" value="'.$symb.'" />'."\n".
	'<input type="hidden" name="saveStatusOld" value="'.$saveStatus.'" />'."\n";

    if (exists($ENV{'form.gradingMenu'}) && exists($ENV{'form.Status'})) {
	$gradeTable.='<input type="hidden" name="Status"   value="'.$ENV{'form.Status'}.'" />'."\n";
    } else {
	$gradeTable.='<b>Student Status:</b> '.
	    &Apache::lonhtmlcommon::StatusOptions($saveStatus,undef,1,'javascript:reLoadList(this.form);').'<br />';
    }

    $gradeTable.='To '.lc($viewgrade).' a submission or a group of submissions, click on the check box(es) '.
	'next to the student\'s name(s). Then click on the Next button.<br />'."\n".
	'<input type="hidden" name="command" value="processGroup" />'."\n";
    $gradeTable.='<input type="button" '."\n".
	'onClick="javascript:checkSelect(this.form.stuinfo);" '."\n".
	'value="Next->" />'."\n";
    $gradeTable.='<input type="checkbox" name="checkPlag" checked="on">Check For Plagiarism</input>';
    my (undef, undef, $fullname) = &getclasslist($getsec,'1');  
    $gradeTable.='<table border="0"><tr><td bgcolor="#777777">'.
	'<table border="0"><tr bgcolor="#e6ffff">';
    my $loop = 0;
    while ($loop < 2) {
	$gradeTable.='<td><b>&nbsp;No.</b>&nbsp;</td><td><b>&nbsp;Select&nbsp;</b></td>'.
	    '<td>'.&nameUserString('header').'</td>';
	if ($ENV{'form.showgrading'} eq 'yes' && $submitonly ne 'all') {
	    foreach (sort(@$partlist)) {
		my $display_part=&get_display_part((split(/_/))[0],$url,$symb);
		$gradeTable.='<td><b>&nbsp;Part: '.$display_part.
		    ' Status&nbsp;</b></td>';
	    }
	}
	$loop++;
#	$gradeTable.='<td></td>' if ($loop%2 ==1);
    }
    $gradeTable.='</tr>'."\n";

    my $ctr = 0;
    foreach my $student (sort {lc($$fullname{$a}) cmp lc($$fullname{$b}) } keys %$fullname) {
	my ($uname,$udom) = split(/:/,$student);
	my %status = ();
	if ($ENV{'form.showgrading'} eq 'yes' && $submitonly ne 'all') {
	    (%status) =&student_gradeStatus($url,$symb,$udom,$uname,$partlist);
	    my $submitted = 0;
	    my $graded = 0;
	    foreach (keys(%status)) {
		$submitted = 1 if ($status{$_} ne 'nothing');
		$graded = 1 if ($status{$_} !~ /^correct/);

		my ($foo,$partid,$foo1) = split(/\./,$_);
		if ($status{'resource.'.$partid.'.submitted_by'} ne '') {
		    $submitted = 0;
		    my ($part)=split(/\./,$partid);
		    $gradeTable.='<input type="hidden" name="'.
			$student.':'.$part.':submitted_by" value="'.
			$status{'resource.'.$partid.'.submitted_by'}.'" />';
		}
	    }
	    next if (!$submitted && ($submitonly eq 'yes' ||
				     $submitonly eq 'incorrect' ||
				     $submitonly eq 'graded'));
	    next if (!$graded && ($submitonly eq 'graded' ||
				  $submitonly eq 'incorrect'));
	}

	$ctr++;
	if ( $perm{'vgr'} eq 'F' ) {
	    $gradeTable.='<tr bgcolor="#ffffe6">' if ($ctr%2 ==1);
	    $gradeTable.='<td align="right">'.$ctr.'&nbsp;</td>'.
		'<td align="center"><input type=checkbox name="stuinfo" value="'.
		$student.':'.$$fullname{$student}.'&nbsp;"></td>'."\n".
		'<td>'.&nameUserString(undef,$$fullname{$student},$uname,$udom).'</td>'."\n";

	    if ($ENV{'form.showgrading'} eq 'yes' && $submitonly ne 'all') {
		foreach (sort keys(%status)) {
		    next if (/^resource.*?submitted_by$/);
		    $gradeTable.='<td align="middle">&nbsp;'.$status{$_}.'&nbsp;</td>'."\n";
		}
	    }
#	    $gradeTable.='<td></td>' if ($ctr%2 ==1);
	    $gradeTable.='</tr>'."\n" if ($ctr%2 ==0);
	}
    }
    if ($ctr%2 ==1) {
	$gradeTable.='<td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td>';
	    if ($ENV{'form.showgrading'} eq 'yes' && $submitonly ne 'all') {
		foreach (@$partlist) {
		    $gradeTable.='<td>&nbsp;</td>';
		}
	    }
	$gradeTable.='</tr>';
    }

    $gradeTable.='</table></td></tr></table>'.
	'<input type="button" '.
	'onClick="javascript:checkSelect(this.form.stuinfo);" '.
	'value="Next->" /></form>'."\n";
    if ($ctr == 0) {
	my $num_students=(scalar(keys(%$fullname)));
	if ($num_students eq 0) {
	    $gradeTable='<br />&nbsp;<font color="red">There are no students currently enrolled.</font>';
	} else {
	    my $submissions='submissions';
	    if ($submitonly eq 'incorrect') { $submissions = 'incorrect submissions'; }
	    if ($submitonly eq 'graded'   ) { $submissions = 'ungraded submissions'; }
	    $gradeTable='<br />&nbsp;<font color="red">'.
		'No '.$submissions.' found for this resource for any students. ('.$num_students.
		' students checked for '.$submissions.')</font><br />';
	}
    } elsif ($ctr == 1) {
	$gradeTable =~ s/type=checkbox/type=checkbox checked/;
    }
    $gradeTable.=&show_grading_menu_form($symb,$url);
    $request->print($gradeTable);
    return '';
}

#---- Called from the listStudents routine
#     Displays the submissions for one student or a group of students
sub processGroup {
    my ($request)  = shift;
    my $ctr        = 0;
    my @stuchecked = &Apache::loncommon::get_env_multiple('form.stuinfo');
    my $total      = scalar(@stuchecked)-1;

    foreach (@stuchecked) {
	my ($uname,$udom,$fullname) = split(/:/);
	$ENV{'form.student'}        = $uname;
	$ENV{'form.userdom'}        = $udom;
	$ENV{'form.fullname'}       = $fullname;
	&submission($request,$ctr,$total);
	$ctr++;
    }
    return '';
}

#------------------------------------------------------------------------------------
#
#-------------------------- Next few routines handles grading by student, essentially
#                           handles essay response type problem/part
#
#--- Javascript to handle the submission page functionality ---
sub sub_page_js {
    my $request = shift;
    $request->print(<<SUBJAVASCRIPT);
<script type="text/javascript" language="javascript">
    function updateRadio(formname,id,weight) {
	var gradeBox = formname["GD_BOX"+id];
	var radioButton = formname["RADVAL"+id];
	var oldpts = formname["oldpts"+id].value;
	var pts = checkSolved(formname,id) == 'update' ? gradeBox.value : oldpts;
	gradeBox.value = pts;
	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) {
		    gradeBox.value = i;
		    resetbox = true;
		}
	    }
	    if (!resetbox) {
		formtextbox.value = "";
	    }
	    return;
	}

	if (pts > weight) {
	    var resp = confirm("You entered a value ("+pts+
			       ") greater than the weight for the part. Accept?");
	    if (resp == false) {
		gradeBox.value = oldpts;
		return;
	    }
	}

	for (var i=0; i<radioButton.length; i++) {
	    radioButton[i].checked=false;
	    if (pts == i && pts != "") {
		radioButton[i].checked=true;
	    }
	}
	updateSelect(formname,id);
	formname["stores"+id].value = "0";
    }

    function writeBox(formname,id,pts) {
	var gradeBox = formname["GD_BOX"+id];
	if (checkSolved(formname,id) == 'update') {
	    gradeBox.value = pts;
	} else {
	    var oldpts = formname["oldpts"+id].value;
	    gradeBox.value = oldpts;
	    var radioButton = formname["RADVAL"+id];
	    for (var i=0; i<radioButton.length; i++) {
		radioButton[i].checked=false;
		if (i == oldpts) {
		    radioButton[i].checked=true;
		}
	    }
	}
	formname["stores"+id].value = "0";
	updateSelect(formname,id);
	return;
    }

    function clearRadBox(formname,id) {
	if (checkSolved(formname,id) == 'noupdate') {
	    updateSelect(formname,id);
	    return;
	}
	gradeSelect = formname["GD_SEL"+id];
	for (var i=0; i<gradeSelect.length; i++) {
	    if (gradeSelect[i].selected) {
		var selectx=i;
	    }
	}
	var stores = formname["stores"+id];
	if (selectx == stores.value) { return };
	var gradeBox = formname["GD_BOX"+id];
	gradeBox.value = "";
	var radioButton = formname["RADVAL"+id];
	for (var i=0; i<radioButton.length; i++) {
	    radioButton[i].checked=false;
	}
	stores.value = selectx;
    }

    function checkSolved(formname,id) {
	if (formname["solved"+id].value == "correct_by_student" && formname.overRideScore.value == 'no') {
	    var reply = confirm("This problem has been graded correct by the computer. Do you want to change the score?");
	    if (!reply) {return "noupdate";}
	    formname.overRideScore.value = 'yes';
	}
	return "update";
    }

    function updateSelect(formname,id) {
	formname["GD_SEL"+id][0].selected = true;
	return;
    }

//=========== Check that a point is assigned for all the parts  ============
    function checksubmit(formname,val,total,parttot) {
	formname.gradeOpt.value = val;
	if (val == "Save & Next") {
	    for (i=0;i<=total;i++) {
		for (j=0;j<parttot;j++) {
		    var partid = formname["partid"+i+"_"+j].value;
		    if (formname["GD_SEL"+i+"_"+partid][0].selected) {
			var points = formname["GD_BOX"+i+"_"+partid].value;
			if (points == "") {
			    var name = formname["name"+i].value;
			    var studentID = (name != '' ? name : formname["unamedom"+i].value);
			    var resp = confirm("You did not assign a score for "+studentID+
					       ", part "+partid+". Continue?");
			    if (resp == false) {
				formname["GD_BOX"+i+"_"+partid].focus();
				return false;
			    }
			}
		    }
		    
		}
	    }
	    
	}
	if (val == "Grade Student") {
	    formname.showgrading.value = "yes";
	    if (formname.Status.value == "") {
		formname.Status.value = "Active";
	    }
	    formname.studentNo.value = total;
	}
	formname.submit();
    }

//======= Check that a score is assigned for all the problems (page/sequence grading only) =========
    function checkSubmitPage(formname,total) {
	noscore = new Array(100);
	var ptr = 0;
	for (i=1;i<total;i++) {
	    var partid = formname["q_"+i].value;
	    if (formname["GD_SEL"+i+"_"+partid][0].selected) {
		var points = formname["GD_BOX"+i+"_"+partid].value;
		var status = formname["solved"+i+"_"+partid].value;
		if (points == "" && status != "correct_by_student") {
		    noscore[ptr] = i;
		    ptr++;
		}
	    }
	}
	if (ptr != 0) {
	    var sense = ptr == 1 ? ": " : "s: ";
	    var prolist = "";
	    if (ptr == 1) {
		prolist = noscore[0];
	    } else {
		var i = 0;
		while (i < ptr-1) {
		    prolist += noscore[i]+", ";
		    i++;
		}
		prolist += "and "+noscore[i];
	    }
	    var resp = confirm("You did not assign any score for the following problem"+sense+prolist+". Continue?");
	    if (resp == false) {
		return false;
	    }
	}

	formname.submit();
    }
</script>
SUBJAVASCRIPT
}

#--- javascript for essay type problem --
sub sub_page_kw_js {
    my $request = shift;
    my $iconpath = $request->dir_config('lonIconsURL');
    &commonJSfunctions($request);
    my $docopen=&Apache::lonhtmlcommon::javascript_docopen();
    $request->print(<<SUBJAVASCRIPT);
<script type="text/javascript" language="javascript">

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

    if (formname.keywords.value != "") {
	formname.refresh.value = "on";
	formname.submit();
    }
    return;
  }

//===================== Script to view submitted by ==================
  function viewSubmitter(submitter) {
    document.SCORE.refresh.value = "on";
    document.SCORE.NCT.value = "1";
    document.SCORE.unamedom0.value = submitter;
    document.SCORE.submit();
    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("Please 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;
    document.SCORE.keywords.value = document.SCORE.keywords.value+" "+nret;
    if (document.SCORE.keywords.value != "") {
	document.SCORE.refresh.value = "on";
	document.SCORE.submit();
    }
    return;
  }

//====================== Script for composing message ==============
   // preload images
   img1 = new Image();
   img1.src = "$iconpath/mailbkgrd.gif";
   img2 = new Image();
   img2.src = "$iconpath/mailto.gif";

  function msgCenter(msgform,usrctr,fullname) {
    var Nmsg  = msgform.savemsgN.value;
    savedMsgHeader(Nmsg,usrctr,fullname);
    var subject = msgform.msgsub.value;
    var msgchk = document.SCORE["includemsg"+usrctr].value;
    re = /msgsub/;
    var shwsel = "";
    if (re.test(msgchk)) { shwsel = "checked" }
    subject = (document.SCORE.shownSub.value == 0 ? checkEntities(subject) : subject);
    displaySubject(checkEntities(subject),shwsel);
    for (var i=1; i<=Nmsg; i++) {
	var testmsg = "savemsg"+i+",";
	re = new RegExp(testmsg,"g");
	shwsel = "";
	if (re.test(msgchk)) { shwsel = "checked" }
	var message = document.SCORE["savemsg"+i].value;
	message = (document.SCORE["shownOnce"+i].value == 0 ? checkEntities(message) : message);
	displaySavedMsg(i,message,shwsel); //I do not get it. w/o checkEntities on saved messages,
	                                   //any &lt; is already converted to <, etc. However, only once!!
    }
    newmsg = document.SCORE["newmsg"+usrctr].value;
    shwsel = "";
    re = /newmsg/;
    if (re.test(msgchk)) { shwsel = "checked" }
    newMsg(newmsg,shwsel);
    msgTail(); 
    return;
  }

  function checkEntities(strx) {
    if (strx.length == 0) return strx;
    var orgStr = ["&", "<", ">", '"']; 
    var newStr = ["&amp;", "&lt;", "&gt;", "&quot;"];
    var counter = 0;
    while (counter < 4) {
	strx = strReplace(strx,orgStr[counter],newStr[counter]);
	counter++;
    }
    return strx;
  }

  function strReplace(strx, orgStr, newStr) {
    return strx.split(orgStr).join(newStr);
  }

  function savedMsgHeader(Nmsg,usrctr,fullname) {
    var height = 70*Nmsg+250;
    var scrollbar = "no";
    if (height > 600) {
	height = 600;
	scrollbar = "yes";
    }
    var xpos = (screen.width-600)/2;
    xpos = (xpos < 0) ? '0' : xpos;
    var ypos = (screen.height-height)/2-30;
    ypos = (ypos < 0) ? '0' : ypos;

    pWin = window.open('', 'MessageCenter', 'resizable=yes,toolbar=no,location=no,scrollbars='+scrollbar+',screenx='+xpos+',screeny='+ypos+',width=600,height='+height);
    pWin.focus();
    pDoc = pWin.document;
    pDoc.$docopen;
    pDoc.write("<html><head>");
    pDoc.write("<title>Message Central</title>");

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

    pDoc.write("  var msgchk = \\"\\";");
    pDoc.write("  if (document.msgcenter.subchk.checked) {");
    pDoc.write("     msgchk = \\"msgsub,\\";");
    pDoc.write("  }");
    pDoc.write("  var includemsg = 0;");
    pDoc.write("  for (var i=1; i<=nmsg; i++) {");
    pDoc.write("      var opnmsg = opener.document.SCORE[\\"savemsg\\"+i];");
    pDoc.write("      var frmmsg = document.msgcenter[\\"msg\\"+i];");
    pDoc.write("      opnmsg.value = opener.checkEntities(frmmsg.value);");
    pDoc.write("      var showflg = opener.document.SCORE[\\"shownOnce\\"+i];");
    pDoc.write("      showflg.value = \\"1\\";");
    pDoc.write("      var chkbox = document.msgcenter[\\"msgn\\"+i];");
    pDoc.write("      if (chkbox.checked) {");
    pDoc.write("         msgchk += \\"savemsg\\"+i+\\",\\";");
    pDoc.write("         includemsg = 1;");
    pDoc.write("      }");
    pDoc.write("  }");
    pDoc.write("  if (document.msgcenter.newmsgchk.checked) {");
    pDoc.write("     msgchk += \\"newmsg\\"+usrctr;");
    pDoc.write("     includemsg = 1;");
    pDoc.write("  }");
    pDoc.write("  imgformname = opener.document.SCORE[\\"mailicon\\"+usrctr];");
    pDoc.write("  imgformname.src = \\"$iconpath/\\"+((includemsg) ? \\"mailto.gif\\" : \\"mailbkgrd.gif\\");");
    pDoc.write("  var includemsg = opener.document.SCORE[\\"includemsg\\"+usrctr];");
    pDoc.write("  includemsg.value = msgchk;");

    pDoc.write("  self.close()");

    pDoc.write("}");

    pDoc.write("<");
    pDoc.write("/script>");

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

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

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

  function displaySavedMsg(ctr,msg,shwsel) {
    pDoc = pWin.document;
    pDoc.write("<tr bgcolor=\\"#ffffdd\\">");
    pDoc.write("<td align=\\"center\\">"+ctr+"</td>");
    pDoc.write("<td align=\\"center\\"><input name=\\"msgn"+ctr+"\\" type=\\"checkbox\\"" +shwsel+"></td>");
    pDoc.write("<td><textarea name=\\"msg"+ctr+"\\" cols=\\"60\\" rows=\\"3\\">"+msg+"</textarea></td></tr>");
}

  function newMsg(newmsg,shwsel) {
    pDoc = pWin.document;
    pDoc.write("<tr bgcolor=\\"#ffffdd\\">");
    pDoc.write("<td align=\\"center\\">New</td>");
    pDoc.write("<td align=\\"center\\"><input name=\\"newmsgchk\\" type=\\"checkbox\\"" +shwsel+"></td>");
    pDoc.write("<td><textarea name=\\"newmsg\\" cols=\\"60\\" rows=\\"3\\" onchange=\\"javascript:this.form.newmsgchk.checked=true\\" >"+newmsg+"</textarea></td></tr>");
}

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

//====================== 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() {
//    if (window.hwdWin) window.hwdWin.close();
    var xpos = (screen.width-400)/2;
    xpos = (xpos < 0) ? '0' : xpos;
    var ypos = (screen.height-330)/2-30;
    ypos = (ypos < 0) ? '0' : ypos;

    hwdWin = window.open('', 'KeywordHighlightCentral', 'resizeable=yes,toolbar=no,location=no,scrollbars=no,width=400,height=300,screenx='+xpos+',screeny='+ypos);
    hwdWin.focus();
    var hDoc = hwdWin.document;
    hDoc.$docopen;
    hDoc.write("<html><head>");
    hDoc.write("<title>Highlight Central</title>");

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

    hDoc.write("<");
    hDoc.write("/script>");

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

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

    hDoc.write("<table border=0 width=100%><tr><td bgcolor=\\"#777777\\">");
    hDoc.write("<table border=0 width=100%><tr bgcolor=\\"#ddffff\\">");
    hDoc.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) { 
    var hDoc = hwdWin.document;
    hDoc.write("<tr bgcolor=\\"#ffffdd\\">");
    hDoc.write("<td align=\\"left\\">");
    hDoc.write("<input name=\\"kwdclr\\" type=\\"radio\\" value=\\""+clrval+"\\" "+clrsel+">&nbsp;"+clrtxt+"</td>");
    hDoc.write("<td align=\\"left\\">");
    hDoc.write("<input name=\\"kwdsize\\" type=\\"radio\\" value=\\""+szval+"\\" "+szsel+">&nbsp;"+sztxt+"</td>");
    hDoc.write("<td align=\\"left\\">");
    hDoc.write("<input name=\\"kwdstyle\\" type=\\"radio\\" value=\\""+syval+"\\" "+sysel+">&nbsp;"+sytxt+"</td>");
    hDoc.write("</tr>");
  }

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

</script>
SUBJAVASCRIPT
}

#--- displays the grading box, used in essay type problem and grading by page/sequence
sub gradeBox {
    my ($request,$symb,$uname,$udom,$counter,$partid,$record) = @_;

    my $checkIcon = '<img src="'.$request->dir_config('lonIconsURL').
	'/check.gif" height="16" border="0" />';

    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 $score  = ($$record{'resource.'.$partid.'.awarded'} eq '' ?
		  '' : $$record{'resource.'.$partid.'.awarded'}*$wgt);
    my $result='<input type="hidden" name="WGT'.$counter.'_'.$partid.'" value="'.$wgt.'" />'."\n";

    my $display_part=&get_display_part($partid,undef,$symb);
    $result.='<table border="0"><tr><td>'.
	'<b>Part: </b>'.$display_part.' <b>Points: </b></td><td>'."\n";

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

    $result.='</td><td>&nbsp;<b>or</b>&nbsp;</td>'."\n";
    $result.='<td><input type="text" name="GD_BOX'.$counter.'_'.$partid.'"'.
	($score ne ''? ' value = "'.$score.'"':'').' size="4" '.
	'onChange="javascript:updateRadio(this.form,\''.$counter.'_'.$partid.'\','.
	$wgt.')" /></td>'."\n";
    $result.='<td>/'.$wgt.' '.$wgtmsg.
	($$record{'resource.'.$partid.'.solved'} eq 'correct_by_student' ? '&nbsp;'.$checkIcon : '').
	' </td><td>'."\n";

    $result.='<select name="GD_SEL'.$counter.'_'.$partid.'" '.
	'onChange="javascript:clearRadBox(this.form,\''.$counter.'_'.$partid.'\')" >'."\n";
    if ($$record{'resource.'.$partid.'.solved'} eq 'excused') {
	$result.='<option> </option>'.
	    '<option selected="on">excused</option>';
    } else {
	$result.='<option selected="on"> </option>'.
	    '<option>excused</option>';
    }
    $result.='<option>reset status</option></select>'."\n";
    $result.="&nbsp&nbsp\n";
    $result.='<input type="hidden" name="stores'.$counter.'_'.$partid.'" value="" />'."\n".
	'<input type="hidden" name="oldpts'.$counter.'_'.$partid.'" value="'.$score.'" />'."\n".
	'<input type="hidden" name="solved'.$counter.'_'.$partid.'" value="'.
	$$record{'resource.'.$partid.'.solved'}.'" />'."\n";
    $result.='</td></tr></table>'."\n";
    return $result;
}

sub show_problem {
    my ($request,$symb,$uname,$udom,$removeform,$viewon,$mode) = @_;
    my $rendered;
    if ($mode eq 'both' or $mode eq 'text') {
	$rendered=&Apache::loncommon::get_student_view($symb,$uname,$udom,
					     $ENV{'request.course.id'});
    }
    if ($removeform) {
	$rendered=~s|<form(.*?)>||g;
	$rendered=~s|</form>||g;
	$rendered=~s|name="submit"|name="would_have_been_submit"|g;
    }
    my $companswer;
    if ($mode eq 'both' or $mode eq 'answer') {
	$companswer=&Apache::loncommon::get_student_answers($symb,$uname,$udom,
						    $ENV{'request.course.id'});
    }
    if ($removeform) {
	$companswer=~s|<form(.*?)>||g;
	$companswer=~s|</form>||g;
	$companswer=~s|name="submit"|name="would_have_been_submit"|g;
    }
    my $result.='<table border="0" width="100%"><tr><td bgcolor="#777777">';
    $result.='<table border="0" width="100%">';
    if ($viewon) {
	$result.='<tr><td bgcolor="#e6ffff"><b> ';
	if ($mode eq 'both' or $mode eq 'text') {
	    $result.='View of the problem - ';
	} else {
	    $result.='Correct answer: ';
	}
	$result.=$ENV{'form.fullname'}.'</b></td></tr>';
    }
    if ($mode eq 'both') {
	$result.='<tr><td bgcolor="#ffffff">'.$rendered.'<br />';
	$result.='<b>Correct answer:</b><br />'.$companswer;
    } elsif ($mode eq 'text') {
	$result.='<tr><td bgcolor="#ffffff">'.$rendered;
    } elsif ($mode eq 'answer') {
	$result.='<tr><td bgcolor="#ffffff">'.$companswer;
    }
    $result.='</td></tr></table>';
    $result.='</td></tr></table><br />';
    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'})--;
    my ($uname,$udom)     = ($ENV{'form.student'},$ENV{'form.userdom'});
    $udom = ($udom eq '' ? $ENV{'user.domain'} : $udom); #has form.userdom changed for a student?
    my $usec = &Apache::lonnet::getsection($udom,$uname,$ENV{'request.course.id'});
    $ENV{'form.fullname'} = &get_fullname ($uname,$udom) if $ENV{'form.fullname'} eq '';

    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 ''; }

    if (!&canview($usec)) {
	$request->print('<font color="red">Unable to view requested student.('.
			$uname.$udom.$usec.$ENV{'request.course.id'}.')</font>');
	$request->print(&show_grading_menu_form($symb,$url));
	return;
    }

    if (!$ENV{'form.lastSub'}) { $ENV{'form.lastSub'} = 'datesub'; }
    if (!$ENV{'form.vProb'}) { $ENV{'form.vProb'} = 'yes'; }
    if (!$ENV{'form.vAns'}) { $ENV{'form.vAns'} = 'yes'; }
    my $last = ($ENV{'form.lastSub'} eq 'last' ? 'last' : '');
    my $checkIcon = '<img src="'.$request->dir_config('lonIconsURL').
	'/check.gif" height="16" border="0" />';

    # header info
    if ($counter == 0) {
	&sub_page_js($request);
	&sub_page_kw_js($request) if ($ENV{'form.handgrade'} eq 'yes');
	$ENV{'form.probTitle'} = $ENV{'form.probTitle'} eq '' ? 
	    &Apache::lonnet::gettitle($symb) : $ENV{'form.probTitle'};

	$request->print('<h3>&nbsp;<font color="#339933">Submission Record</font></h3>'."\n".
			'<font size=+1>&nbsp;<b>Resource: </b>'.$ENV{'form.probTitle'}.'</font>'."\n");

	if ($ENV{'form.handgrade'} eq 'no') {
	    my $checkMark='<br /><br />&nbsp;<b>Note:</b> Part(s) graded correct by the computer is marked with a '.
		$checkIcon.' symbol.'."\n";
	    $request->print($checkMark);
	}

	# 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' or $ENV{'form.vAns'} eq 'yes') {
	    my $mode;
	    if ($ENV{'form.vProb'} eq 'yes' && $ENV{'form.vAns'} eq 'yes') {
		$mode='both';
	    } elsif ($ENV{'form.vProb'} eq 'yes') {
		$mode='text';
	    } elsif ($ENV{'form.vAns'} eq 'yes') {
		$mode='answer';
	    }
	    $request->print(&show_problem($request,$symb,$uname,$udom,0,1,$mode));
	}
	
	# 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 '' && $ENV{'form.handgrade'} eq 'yes') {
	    %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'} : $ENV{'form.probTitle'};
	    $ENV{'form.savemsgN'} = $keyhash{$symb.'_savemsgN'} ne '' ? $keyhash{$symb.'_savemsgN'} : '0';
	}
	my $overRideScore = $ENV{'form.overRideScore'} eq '' ? 'no' : $ENV{'form.overRideScore'};

	$request->print('<form action="/adm/grades" method="post" name="SCORE">'."\n".
			'<input type="hidden" name="command"    value="handgrade" />'."\n".
			'<input type="hidden" name="saveState"  value="'.$ENV{'form.saveState'}.'" />'."\n".
			'<input type="hidden" name="Status"     value="'.$ENV{'form.Status'}.'" />'."\n".
			'<input type="hidden" name="overRideScore" value="'.$overRideScore.'" />'."\n".
			'<input type="hidden" name="probTitle"  value="'.$ENV{'form.probTitle'}.'" />'."\n".
			'<input type="hidden" name="refresh"    value="off" />'."\n".
			'<input type="hidden" name="studentNo"  value="" />'."\n".
			'<input type="hidden" name="gradeOpt"   value="" />'."\n".
			'<input type="hidden" name="symb"       value="'.$symb.'" />'."\n".
			'<input type="hidden" name="url"        value="'.$url.'" />'."\n".
			'<input type="hidden" name="showgrading" value="'.$ENV{'form.showgrading'}.'" />'."\n".
			'<input type="hidden" name="vProb"      value="'.$ENV{'form.vProb'}.'" />'."\n".
			'<input type="hidden" name="vAns"       value="'.$ENV{'form.vAns'}.'" />'."\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="'.$ENV{'form.submitonly'}.'">'."\n".
			'<input type="hidden" name="handgrade"  value="'.$ENV{'form.handgrade'}.'">'."\n".
			'<input type="hidden" name="NCT"'.
			' value="'.($ENV{'form.NTSTU'} ne '' ? $ENV{'form.NTSTU'} : $total+1).'" />'."\n");
	if ($ENV{'form.handgrade'} eq 'yes') {
	    $request->print('<input type="hidden" name="keywords" value="'.$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="shownSub" value="0" />'."\n".
			    '<input type="hidden" name="savemsgN" value="'.$ENV{'form.savemsgN'}.'" />'."\n");
	    foreach my $partid (&Apache::loncommon::get_env_multiple('form.vPart')) {
		$request->print('<input type="hidden" name="vPart" value="'.$partid.'" />'."\n");
	    }
	}
	
	my ($cts,$prnmsg) = (1,'');
	while ($cts <= $ENV{'form.savemsgN'}) {
	    $prnmsg.='<input type="hidden" name="savemsg'.$cts.'" value="'.
		(!exists($keyhash{$symb.'_savemsg'.$cts}) ? 
		 &Apache::lonfeedback::clear_out_html($ENV{'form.savemsg'.$cts}) :
		 &Apache::lonfeedback::clear_out_html($keyhash{$symb.'_savemsg'.$cts})).
		'" />'."\n".
		'<input type="hidden" name="shownOnce'.$cts.'" value="0" />'."\n";
	    $cts++;
	}
	$request->print($prnmsg);

	if ($ENV{'form.handgrade'} eq 'yes' && $ENV{'form.showgrading'} eq 'yes') {
#
# Print out the keyword options line
#
	    $request->print(<<KEYWORDS);
&nbsp;<b>Keyword Options:</b>&nbsp;
<a href="javascript:keywords(document.SCORE)"; 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
#
# Load the other essays for similarity check
#
            my $essayurl=&Apache::lonnet::declutter($url);
	    my ($adom,$aname,$apath)=($essayurl=~/^(\w+)\/(\w+)\/(.*)$/);
	    $apath=&Apache::lonnet::escape($apath);
	    $apath=~s/\W/\_/gs;
	    %oldessays=&Apache::lonnet::dump('nohist_essay_'.$apath,$adom,$aname);
        }
    }

    if ($ENV{'form.vProb'} eq 'all' or $ENV{'form.vAns'} eq 'all') {
	$request->print('<br /><br /><br />') if ($counter > 0);
	my $mode;
	if ($ENV{'form.vProb'} eq 'all' && $ENV{'form.vAns'} eq 'all') {
	    $mode='both';
	} elsif ($ENV{'form.vProb'} eq 'all' ) {
	    $mode='text';
	} elsif ($ENV{'form.vAns'} eq 'all') {
	    $mode='answer';
	}
	$request->print(&show_problem($request,$symb,$uname,$udom,1,1,$mode));
    }

    my %record = &Apache::lonnet::restore($symb,$ENV{'request.course.id'},$udom,$uname);

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

    # Display student info
    $request->print(($counter == 0 ? '' : '<br />'));
    my $result='<table border="0" width=100%><tr><td bgcolor="#777777">'."\n".
	'<table border="0" width=100%><tr bgcolor="#edffff"><td>'."\n";

    $result.='<b>Fullname: </b>'.&nameUserString(undef,$ENV{'form.fullname'},$uname,$udom).'<br />'."\n";
    $result.='<input type="hidden" name="name'.$counter.
	'" value="'.$ENV{'form.fullname'}.'" />'."\n";

    # If any part of the problem is an essay-response (handgraded), then check for collaborators
    my @col_fullnames;
    my ($classlist,$fullname);
    if ($ENV{'form.handgrade'} eq 'yes') {
	($classlist,undef,$fullname) = &getclasslist('all','0');
	for (keys (%$handgrade)) {
	    my $ncol = &Apache::lonnet::EXT('resource.'.$_.
					    '.maxcollaborators',
                                            $symb,$udom,$uname);
	    next if ($ncol <= 0);
            s/\_/\./g;
            next if ($record{'resource.'.$_.'.collaborators'} eq '');
            my @goodcollaborators = ();
            my @badcollaborators  = ();
	    foreach (split(/,?\s+/,$record{'resource.'.$_.'.collaborators'})) { 
		$_ =~ s/[\$\^\(\)]//g;
		next if ($_ eq '');
		my ($co_name,$co_dom) = split /\@|:/,$_;
		$co_dom = $udom if (! defined($co_dom) || $co_dom =~ /^domain$/i);
		next if ($co_name eq $uname && $co_dom eq $udom);
		# Doing this grep allows 'fuzzy' specification
		my @Matches = grep /^$co_name:$co_dom$/i,keys %$classlist;
		if (! scalar(@Matches)) {
		    push @badcollaborators,$_;
		} else {
		    push @goodcollaborators, @Matches;
		}
	    }
            if (scalar(@goodcollaborators) != 0) {
                $result.='<b>Collaborators: </b>';
                foreach (@goodcollaborators) {
		    my ($lastname,$givenn) = split(/,/,$$fullname{$_});
		    push @col_fullnames, $givenn.' '.$lastname;
		    $result.=$$fullname{$_}.'&nbsp; &nbsp; &nbsp;';
		}
                $result.='<br />'."\n";
		my ($part)=split(/\./,$_);
		$result.='<input type="hidden" name="collaborator'.$counter.
		    '" value="'.$part.':'.(join ':',@goodcollaborators).'" />'.
		    "\n";
	    }
	    if (scalar(@badcollaborators) > 0) {
		$result.='<table border="0"><tr bgcolor="#ffbbbb"><td>';
		$result.='This student has submitted ';
		$result.=(scalar(@badcollaborators) == 1) ? 'an invalid collaborator' : 'invalid collaborators';
		$result .= ': '.join(', ',@badcollaborators);
		$result .= '</td></tr></table>';
	    }         
	    if (scalar(@badcollaborators > $ncol)) {
		$result .= '<table border="0"><tr bgcolor="#ffbbbb"><td>';
		$result .= 'This student has submitted too many '.
		    'collaborators.  Maximum is '.$ncol.'.';
		$result .= '</td></tr></table>';
	    }
	}
    }
    $request->print($result."\n");

    # print student answer/submission
    # Options are (1) Handgaded submission only
    #             (2) Last submission, includes submission that is not handgraded 
    #                  (for multi-response type part)
    #             (3) Last submission plus the parts info
    #             (4) The whole record for this student
    if ($ENV{'form.lastSub'} =~ /^(lastonly|hdgrade)$/) {
	my ($string,$timestamp)= &get_last_submission(\%record);
	my $lastsubonly=''.
	    ($$timestamp eq '' ? '' : '<b>Date Submitted:</b> '.
	     $$timestamp)."</td></tr>\n";
	if ($$timestamp eq '') {
	    $lastsubonly.='<tr><td bgcolor="#ffffe6">'.$$string[0]; 
	} else {
	    my %seenparts;
	    for my $part (sort keys(%$handgrade)) {
		my ($partid,$respid) = split(/_/,$part);
		my $display_part=&get_display_part($partid,$url,$symb);
		if ($ENV{"form.$uname:$udom:$partid:submitted_by"}) {
		    if (exists($seenparts{$partid})) { next; }
		    $seenparts{$partid}=1;
		    my $submitby='<b>Part:</b> '.$display_part.
			' <b>Collaborative submission by:</b> '.
			'<a href="javascript:viewSubmitter(\''.
			$ENV{"form.$uname:$udom:$partid:submitted_by"}.
			'\')"; TARGET=_self>'.
			$$fullname{$ENV{"form.$uname:$udom:$partid:submitted_by"}}.'</a><br />';
		    $request->print($submitby);
		    next;
		}
		my $responsetype = $responseType->{$partid}->{$respid};
		if (!exists($record{"resource.$partid.$respid.submission"})) {
		    $lastsubonly.='<tr><td bgcolor="#ffffe6"><b>Part:</b> '.
			$display_part.' <font color="#999999">( ID '.$respid.
			' )</font>&nbsp; &nbsp;'.
			'<font color="red">Nothing submitted - no attempts</font><br /><br />';
		    next;
		}
		foreach (@$string) {
		    my ($partid,$respid) = /^resource\.([^\.]*)\.([^\.]*)\.submission/;
		    if ($part ne ($partid.'_'.$respid)) { next; }
		    my ($ressub,$subval) = split(/:/,$_,2);
		    # Similarity check
		    my $similar='';
		    if($ENV{'form.checkPlag'}){
			my ($oname,$odom,$ocrsid,$oessay,$osim)=
			    &most_similar($uname,$udom,$subval);
			if ($osim) {
			    $osim=int($osim*100.0);
			    $similar="<hr /><h3><font color=\"#FF0000\">Essay".
				" is $osim% similar to an essay by ".
				&Apache::loncommon::plainname($oname,$odom).
				'</font></h3><blockquote><i>'.
				&keywords_highlight($oessay).
				'</i></blockquote><hr />';
			}
		    }
		    my $order=&get_order($partid,$respid,$symb,$uname,$udom);
		    if ($ENV{'form.lastSub'} eq 'lastonly' || 
			($ENV{'form.lastSub'} eq 'hdgrade' && 
			 $$handgrade{$part} eq 'yes')) {
			my $display_part=&get_display_part($partid,$url,$symb);
			$lastsubonly.='<tr><td bgcolor="#ffffe6"><b>Part:</b> '.
			    $display_part.' <font color="#999999">( ID '.$respid.
			    ' )</font>&nbsp; &nbsp;';
			if ($record{"resource.$partid.$respid.uploadedurl"}) {
			    &Apache::lonnet::allowuploaded('/adm/grades',
			      $record{"resource.$partid.$respid.uploadedurl"});
			    $lastsubonly.='<a href="'.$record{"resource.$partid.$respid.uploadedurl"}.'" target="lonGRDs"><img src="/adm/lonIcons/unknown.gif" border=0"> File uploaded by student</a> <font color="red" size="1">Like all files provided by users, this file may contain virusses</font><br />';
			}
			$lastsubonly.='<b>Submitted Answer: </b>'.
			    &cleanRecord($subval,$responsetype,$symb,$partid,
					 $respid,\%record,$order);
			if ($similar) {$lastsubonly.="<br /><br />$similar\n";}
		    }
		}
	    }
	}
	$lastsubonly.='</td></tr><tr bgcolor="#ffffff"><td>'."\n";
	$request->print($lastsubonly);
    } elsif ($ENV{'form.lastSub'} eq 'datesub') {
	my (undef,$responseType,undef,$parts) = &showResourceInfo($url);
	$request->print(&displaySubByDates($symb,\%record,$parts,$responseType,$checkIcon,$uname,$udom));
    } elsif ($ENV{'form.lastSub'} =~ /^(last|all)$/) {
	$request->print(&Apache::loncommon::get_previous_attempt($symb,$uname,$udom,
								 $ENV{'request.course.id'},
								 $last,'.submission',
								 'Apache::grades::keywords_highlight'));
    }

    $request->print('<input type="hidden" name="unamedom'.$counter.'" value="'.$uname.':'
	.$udom.'" />'."\n");
    
    # return if view submission with no grading option
    if ($ENV{'form.showgrading'} eq '' || (!&canmodify($usec))) {
	my $toGrade.='<input type="button" value="Grade Student" '.
	    'onClick="javascript:checksubmit(this.form,\'Grade Student\',\''
	    .$counter.'\');" TARGET=_self> &nbsp;'."\n" if (&canmodify($usec));
	$toGrade.='</td></tr></table></td></tr></table>'."\n";
	if (($ENV{'form.command'} eq 'submission') || 
	    ($ENV{'form.command'} eq 'processGroup' && $counter == $total)) {
	    $toGrade.='</form>'.&show_grading_menu_form($symb,$url) 
	}
	$request->print($toGrade);
	return;
    } else {
	$request->print('</td></tr></table></td></tr></table>'."\n");
    }

    # essay grading message center
    if ($ENV{'form.handgrade'} eq 'yes') {
	my ($lastname,$givenn) = split(/,/,$ENV{'form.fullname'});
	my $msgfor = $givenn.' '.$lastname;
	if (scalar(@col_fullnames) > 0) {
	    my $lastone = pop @col_fullnames;
	    $msgfor .= ', '.(join ', ',@col_fullnames).' and '.$lastone.'.';
	}
	$msgfor =~ s/\'/\\'/g; #' stupid emacs - no! javascript
	$result='<input type="hidden" name="includemsg'.$counter.'" value="" />'."\n".
	    '<input type="hidden" name="newmsg'.$counter.'" value="" />'."\n";
	$result.='&nbsp;<a href="javascript:msgCenter(document.SCORE,'.$counter.
	    ',\''.$msgfor.'\')"; TARGET=_self>'.
	    'Compose Message to student'.(scalar(@col_fullnames) >= 1 ? 's' : '').'</a> &nbsp;'.
	    '<img src="'.$request->dir_config('lonIconsURL').
	    '/mailbkgrd.gif" width="14" height="10" name="mailicon'.$counter.'" />'."\n".
	    '<br />&nbsp;(Message will be sent when you click on Save & Next below.)'."\n" 
	    if ($ENV{'form.handgrade'} eq 'yes');
	$request->print($result);
    }

    my %seen = ();
    my @partlist;
    my @gradePartRespid;
    for (sort keys(%$handgrade)) {
	my ($partid,$respid) = split(/_/);
	next if ($seen{$partid} > 0);
	$seen{$partid}++;
	next if ($$handgrade{$_} =~ /:no$/ && $ENV{'form.lastSub'} =~ /^(hdgrade)$/);
	push @partlist,$partid;
	push @gradePartRespid,$partid.'.'.$respid;

	$request->print(&gradeBox($request,$symb,$uname,$udom,$counter,$partid,\%record));
    }
    $result='<input type="hidden" name="partlist'.$counter.
	'" value="'.(join ":",@partlist).'" />'."\n";
    $result.='<input type="hidden" name="gradePartRespid'.
	'" value="'.(join ":",@gradePartRespid).'" />'."\n" if ($counter == 0);
    my $ctr = 0;
    while ($ctr < scalar(@partlist)) {
	$result.='<input type="hidden" name="partid'.$counter.'_'.$ctr.'" value="'.
	    $partlist[$ctr].'" />'."\n";
	$ctr++;
    }
    $request->print($result.'</td></tr></table></td></tr></table>'."\n");

    # print end of form
    if ($counter == $total) {
	my $endform='<table border="0"><tr><td>'."\n";
	$endform.='<input type="button" value="Save & Next" '.
	    'onClick="javascript:checksubmit(this.form,\'Save & Next\','.
	    $total.','.scalar(@partlist).');" TARGET=_self> &nbsp;'."\n";
	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="button" value="Previous" '.
	    'onClick="javascript:checksubmit(this.form,\'Previous\');" TARGET=_self> &nbsp;'."\n".
	    '<input type="button" value="Next" '.
	    'onClick="javascript:checksubmit(this.form,\'Next\');" TARGET=_self> &nbsp;';
	$endform.='(Next and Previous (student) do not save the scores.)'."\n" ;
	$endform.='</td><tr></table></form>';
	$endform.=&show_grading_menu_form($symb,$url);
	$request->print($endform);
    }
    return '';
}

#--- Retrieve the last submission for all the parts
sub get_last_submission {
    my ($returnhash)=@_;
    my (@string,$timestamp);
    if ($$returnhash{'version'}) {
	my %lasthash=();
	my ($version);
	for ($version=1;$version<=$$returnhash{'version'};$version++) {
	    foreach (sort(split(/\:/,$$returnhash{$version.':keys'}))) {
		$lasthash{$_}=$$returnhash{$version.':'.$_};
		   $timestamp = scalar(localtime($$returnhash{$version.':timestamp'}));
	    }
	}
	foreach ((keys %lasthash)) {
	    if ($_ =~ /\.submission$/) {
		my ($partid,$foo) = split(/submission$/,$_);
		my $draft  = $lasthash{$partid.'awarddetail'} eq 'DRAFT' ?
		    '<font color="red">Draft Copy</font> ' : '';
		push @string, (join(':',$_,$draft.$lasthash{$_}));
	    }
	}
    }
    @string = $string[0] eq '' ? '<font color="red">Nothing submitted - no attempts.</font>' : @string;
    return \@string,\$timestamp;
}

#--- High light keywords, with style choosen by user.
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) {
	$string =~ s/\b\Q$_\E(\b|\.)/<font color\=$ENV{'form.kwclr'} $size\>$styleon$_$styleoff<\/font>/gi;
    }
    return $string;
}

#--- Called from submission routine
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  = $ENV{'form.NTSTU'};
    if ($button eq 'Save & Next') {
	my $ctr = 0;
	while ($ctr < $ngrade) {
	    my ($uname,$udom) = split(/:/,$ENV{'form.unamedom'.$ctr});
	    my ($errorflag,$pts,$wgt) = &saveHandGrade($request,$url,$symb,$uname,$udom,$ctr);
	    if ($errorflag eq 'no_score') {
		$ctr++;
		next;
	    }
	    if ($errorflag eq 'not_allowed') {
		$request->print("<font color=\"red\">Not allowed to modify grades for $uname:$udom</font>");
		$ctr++;
		next;
	    }
	    my $includemsg = $ENV{'form.includemsg'.$ctr};
	    my ($subject,$message,$msgstatus) = ('','','');
	    if ($includemsg =~ /savemsg|newmsg\Q$ctr\E/) {
		$subject = $ENV{'form.msgsub'} if ($includemsg =~ /^msgsub/);
		my (@msgnum) = split(/,/,$includemsg);
		foreach (@msgnum) {
		    $message.=$ENV{'form.'.$_} if ($_ =~ /savemsg|newmsg/ && $_ ne '');
		}
		$message =&Apache::lonfeedback::clear_out_html($message);
		$message.="\n\nPoint".($pts > 1 ? 's':'').' awarded = '.$pts.' out of '.$wgt;
		$message.=" for <a href=\"".
		    &Apache::lonnet::clutter($url).
		    "?symb=$symb\">$ENV{'form.probTitle'}</a>";
		$msgstatus = &Apache::lonmsg::user_normal_msg ($uname,$udom,
							       $ENV{'form.msgsub'},$message);
	    }
	    if ($ENV{'form.collaborator'.$ctr}) {
		my @collabstrs=&Apache::loncommon::get_env_multiple("form.collaborator$ctr");
		foreach my $collabstr (@collabstrs) {
		    my ($part,@collaborators) = split(/:/,$collabstr);
		    foreach (@collaborators) {
			my ($errorflag,$pts,$wgt) = 
			    &saveHandGrade($request,$url,$symb,$_,$udom,$ctr,
					   $ENV{'form.unamedom'.$ctr},$part);
			if ($errorflag eq 'not_allowed') {
			    $request->print("<font color=\"red\">Not allowed to modify grades for $_:$udom</font>");
			    next;
			} else {
			    if ($message ne '') {
				$msgstatus = &Apache::lonmsg::user_normal_msg($_,$udom,$ENV{'form.msgsub'},$message);
			    }
			    
			}
		    }
		}
	    }
	    $ctr++;
	}
    }

    if ($ENV{'form.handgrade'} eq 'yes') {
	# Keywords sorted in alphabatical order
	my $loginuser = $ENV{'user.name'}.':'.$ENV{'user.domain'};
	my %keyhash = ();
	$ENV{'form.keywords'}           =~ s/,\s{0,}|\s+/ /g;
	$ENV{'form.keywords'}           =~ s/^\s+|\s+$//;
	my (@keywords) = sort(split(/\s+/,$ENV{'form.keywords'}));
	$ENV{'form.keywords'} = join(' ',@keywords);
	$keyhash{$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'};

	# message center - Order of message gets changed. Blank line is eliminated.
	# New messages are saved in ENV for the next student.
	# All messages are saved in nohist_handgrade.db
	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'});
    }
    # Called by Save & Refresh from Highlight Attribute Window
    my (undef,undef,$fullname) = &getclasslist($ENV{'form.section'},'1');
    if ($ENV{'form.refresh'} eq 'on') {
	my ($ctr,$total) = (0,0);
	while ($ctr < $ngrade) {
	    $total++ if  $ENV{'form.unamedom'.$ctr} ne '';
	    $ctr++;
	}
	$ENV{'form.NTSTU'}=$ngrade;
	$ctr = 0;
	while ($ctr < $total) {
	    my $processUser = $ENV{'form.unamedom'.$ctr};
	    ($ENV{'form.student'},$ENV{'form.userdom'}) = split(/:/,$processUser);
	    $ENV{'form.fullname'} = $$fullname{$processUser};
	    &submission($request,$ctr,$total-1);
	    $ctr++;
	}
	return '';
    }

# Go directly to grade student - from submission or link from chart page
    if ($button eq 'Grade Student') {
	(undef,undef,$ENV{'form.handgrade'},undef,undef) = &showResourceInfo($url);
	my $processUser = $ENV{'form.unamedom'.$ENV{'form.studentNo'}};
	($ENV{'form.student'},$ENV{'form.userdom'}) = split(/:/,$processUser);
	$ENV{'form.fullname'} = $$fullname{$processUser};
	&submission($request,0,0);
	return '';
    }

    # Get the next/previous one or group of students
    my $firststu = $ENV{'form.unamedom0'};
    my $laststu = $ENV{'form.unamedom'.($ngrade-1)};
    my $ctr = 2;
    while ($laststu eq '') {
	$laststu  = $ENV{'form.unamedom'.($ngrade-$ctr)};
	$ctr++;
	$laststu = $firststu if ($ctr > $ngrade);
    }

    my (@parsedlist,@nextlist);
    my ($nextflg) = 0;
    foreach (sort {lc($$fullname{$a}) cmp lc($$fullname{$b}) } keys %$fullname) {
	if ($nextflg == 1 && $button =~ /Next$/) {
	    push @parsedlist,$_;
	}
	$nextflg = 1 if ($_ eq $laststu);
	if ($button eq 'Previous') {
	    last if ($_ eq $firststu);
	    push @parsedlist,$_;
	}
    }
    $ctr = 0;
    @parsedlist = reverse @parsedlist if ($button eq 'Previous');
    my ($partlist) = &response_type($url);
    foreach my $student (@parsedlist) {
	my $submitonly=$ENV{'form.submitonly'};
	my ($uname,$udom) = split(/:/,$student);
	if ($submitonly =~ /^(yes|graded|incorrect)$/) {
#	    my %record = &Apache::lonnet::restore($symb,$ENV{'request.course.id'},$udom,$uname);
	    my %status=&student_gradeStatus($url,$symb,$udom,$uname,$partlist);
	    my $submitted = 0;
	    my $graded = 1;
	    foreach (keys(%status)) {
		$submitted = 1 if ($status{$_} ne 'nothing');
		$graded = 0 if ($status{$_} =~ /^correct/);
		my ($foo,$partid,$foo1) = split(/\./,$_);
		if ($status{'resource.'.$partid.'.submitted_by'} ne '') {
		    $submitted = 0;
		}
	    }
	    next if (!$submitted && ($submitonly eq 'yes' ||
				     $submitonly eq 'incorrect' ||
				     $submitonly eq 'graded'));
	    next if (!$graded && ($submitonly eq 'graded' ||
				  $submitonly eq 'incorrect'));
	}
	push @nextlist,$student if ($ctr < $ntstu);
	last if ($ctr == $ntstu);
	$ctr++;
    }

    $ctr = 0;
    my $total = scalar(@nextlist)-1;

    foreach (sort @nextlist) {
	my ($uname,$udom,$submitter) = split(/:/);
	$ENV{'form.student'}  = $uname;
	$ENV{'form.userdom'}  = $udom;
	$ENV{'form.fullname'} = $$fullname{$_};
	&submission($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 '';
}

#---- Save the score and award for each student, if changed
sub saveHandGrade {
    my ($request,$url,$symb,$stuname,$domain,$newflg,$submitter,$part) = @_;
    my $usec = &Apache::lonnet::getsection($domain,$stuname,
					   $ENV{'request.course.id'});
    if (!&canmodify($usec)) { return('not_allowed'); }
    my %record     = &Apache::lonnet::restore($symb,$ENV{'request.course.id'},$domain,$stuname);
    my %newrecord  = ();
    my ($pts,$wgt) = ('','');
    foreach (split(/:/,$ENV{'form.partlist'.$newflg})) {
	#collaborator may vary for different parts
	if ($submitter && $_ ne $part) { next; }
	my $dropMenu = $ENV{'form.GD_SEL'.$newflg.'_'.$_};
	if ($dropMenu eq 'excused') {
	    if ($record{'resource.'.$_.'.solved'} ne 'excused') {
		$newrecord{'resource.'.$_.'.solved'} = 'excused';
		if (exists($record{'resource.'.$_.'.awarded'})) {
		    $newrecord{'resource.'.$_.'.awarded'} = '';
		}
	    $newrecord{'resource.'.$_.'.regrader'}="$ENV{'user.name'}:$ENV{'user.domain'}";
	    }
	} elsif ($dropMenu eq 'reset status'
		 && exists($record{'resource.'.$_.'.solved'})) { #don't bother if no old records -> no attempts
	    foreach my $key (keys (%record)) {
		if ($key=~/^resource\.\Q$_\E\./) { $newrecord{$key} = ''; }
	    }
	    $newrecord{'resource.'.$_.'.regrader'}=
		"$ENV{'user.name'}:$ENV{'user.domain'}";
	} elsif ($dropMenu eq '') {
	    $pts = ($ENV{'form.GD_BOX'.$newflg.'_'.$_} ne '' ? 
		    $ENV{'form.GD_BOX'.$newflg.'_'.$_} : 
		    $ENV{'form.RADVAL'.$newflg.'_'.$_});
	    if ($pts eq '' && $ENV{'form.GD_SEL'.$newflg.'_'.$_} eq '') {
		next;
	    }
	    $wgt = $ENV{'form.WGT'.$newflg.'_'.$_} eq '' ? 1 : 
		$ENV{'form.WGT'.$newflg.'_'.$_};
	    my $partial= $pts/$wgt;
	    if ($partial eq $record{'resource.'.$_.'.awarded'}) {
		#do not update score for part if not changed.
		next;
	    }
	    if ($record{'resource.'.$_.'.awarded'} ne $partial) {
		$newrecord{'resource.'.$_.'.awarded'}  = $partial;
	    }
	    my $reckey = 'resource.'.$_.'.solved';
	    if ($partial == 0) {
		if ($record{$reckey} ne 'incorrect_by_override') {
		    $newrecord{$reckey} = 'incorrect_by_override';
		}
	    } else {
		if ($record{$reckey} ne 'correct_by_override') {
		    $newrecord{$reckey} = 'correct_by_override';
		}
	    }	    
	    if ($submitter && 
		($record{'resource.'.$_.'.submitted_by'} ne $submitter)) {
		$newrecord{'resource.'.$_.'.submitted_by'} = $submitter;
	    }
	    $newrecord{'resource.'.$_.'.regrader'}=
		"$ENV{'user.name'}:$ENV{'user.domain'}";
	}
    }
    if (scalar(keys(%newrecord)) > 0) {
	&Apache::lonnet::cstore(\%newrecord,$symb,
				$ENV{'request.course.id'},$domain,$stuname);
    }
    return '',$pts,$wgt;
}

#--------------------------------------------------------------------------------------
#
#-------------------------- Next few routines handles grading by section or whole class
#
#--- Javascript to handle grading by section or whole class
sub viewgrades_js {
    my ($request) = shift;

    $request->print(<<VIEWJAVASCRIPT);
<script type="text/javascript" language="javascript">
   function writePoint(partid,weight,point) {
	var radioButton = document.classgrade["RADVAL_"+partid];
	var textbox = document.classgrade["TEXTVAL_"+partid];
	if (point == "textval") {
	    point = document.classgrade["TEXTVAL_"+partid].value;
	    if (isNaN(point) || parseFloat(point) < 0) {
		alert("A number equal or greater than 0 is expected. Entered value = "+parseFloat(point));
		var resetbox = false;
		for (var i=0; i<radioButton.length; i++) {
		    if (radioButton[i].checked) {
			textbox.value = i;
			resetbox = true;
		    }
		}
		if (!resetbox) {
		    textbox.value = "";
		}
		return;
	    }
	    if (parseFloat(point) > parseFloat(weight)) {
		var resp = confirm("You entered a value ("+parseFloat(point)+
				   ") greater than the weight for the part. Accept?");
		if (resp == false) {
		    textbox.value = "";
		    return;
		}
	    }
	    for (var i=0; i<radioButton.length; i++) {
		radioButton[i].checked=false;
		if (parseFloat(point) == i) {
		    radioButton[i].checked=true;
		}
	    }

	} else {
	    textbox.value = parseFloat(point);
	}
	for (i=0;i<document.classgrade.total.value;i++) {
	    var user = document.classgrade["ctr"+i].value;
	    var scorename = document.classgrade["GD_"+user+"_"+partid+"_awarded"];
	    var saveval   = document.classgrade["GD_"+user+"_"+partid+"_solved_s"].value;
	    var selname   = document.classgrade["GD_"+user+"_"+partid+"_solved"];
	    if (saveval != "correct") {
		scorename.value = point;
		if (selname[0].selected != true) {
		    selname[0].selected = true;
		}
	    }
	}
	document.classgrade["SELVAL_"+partid][0].selected = true;
    }

    function writeRadText(partid,weight) {
	var selval   = document.classgrade["SELVAL_"+partid];
	var radioButton = document.classgrade["RADVAL_"+partid];
	var textbox = document.classgrade["TEXTVAL_"+partid];
	if (selval[1].selected || selval[2].selected) {
	    for (var i=0; i<radioButton.length; i++) {
		radioButton[i].checked=false;

	    }
	    textbox.value = "";

	    for (i=0;i<document.classgrade.total.value;i++) {
		var user = document.classgrade["ctr"+i].value;
		var scorename = document.classgrade["GD_"+user+"_"+partid+"_awarded"];
		var saveval   = document.classgrade["GD_"+user+"_"+partid+"_solved_s"].value;
		var selname   = document.classgrade["GD_"+user+"_"+partid+"_solved"];
		if (saveval != "correct") {
		    scorename.value = "";
		    if (selval[1].selected) {
			selname[1].selected = true;
		    } else {
			selname[2].selected = true;
			if (Number(document.classgrade["GD_"+user+"_"+partid+"_tries"].value)) 
			{document.classgrade["GD_"+user+"_"+partid+"_tries"].value = '0';}
		    }
		}
	    }
	} else {
	    for (i=0;i<document.classgrade.total.value;i++) {
		var user = document.classgrade["ctr"+i].value;
		var scorename = document.classgrade["GD_"+user+"_"+partid+"_awarded"];
		var saveval   = document.classgrade["GD_"+user+"_"+partid+"_solved_s"].value;
		var selname   = document.classgrade["GD_"+user+"_"+partid+"_solved"];
		if (saveval != "correct") {
		    scorename.value = document.classgrade["GD_"+user+"_"+partid+"_awarded_s"].value;
		    selname[0].selected = true;
		}
	    }
	}	    
    }

    function changeSelect(partid,user) {
	var selval = document.classgrade["GD_"+user+'_'+partid+"_solved"];
	var textbox = document.classgrade["GD_"+user+'_'+partid+"_awarded"];
	var point  = textbox.value;
	var weight = document.classgrade["weight_"+partid].value;

	if (isNaN(point) || parseFloat(point) < 0) {
	    alert("A number equal or greater than 0 is expected. Entered value = "+parseFloat(point));
	    textbox.value = "";
	    return;
	}
	if (parseFloat(point) > parseFloat(weight)) {
	    var resp = confirm("You entered a value ("+parseFloat(point)+
			       ") greater than the weight of the part. Accept?");
	    if (resp == false) {
		textbox.value = "";
		return;
	    }
	}
	selval[0].selected = true;
    }

    function changeOneScore(partid,user) {
	var selval = document.classgrade["GD_"+user+'_'+partid+"_solved"];
	if (selval[1].selected || selval[2].selected) {
	    document.classgrade["GD_"+user+'_'+partid+"_awarded"].value = "";
	    if (selval[2].selected) {
		document.classgrade["GD_"+user+'_'+partid+"_tries"].value = "0";
	    }
	}
    }

    function resetEntry(numpart) {
	for (ctpart=0;ctpart<numpart;ctpart++) {
	    var partid = document.classgrade["partid_"+ctpart].value;
	    var radioButton = document.classgrade["RADVAL_"+partid];
	    var textbox = document.classgrade["TEXTVAL_"+partid];
	    var selval  = document.classgrade["SELVAL_"+partid];
	    for (var i=0; i<radioButton.length; i++) {
		radioButton[i].checked=false;

	    }
	    textbox.value = "";
	    selval[0].selected = true;

	    for (i=0;i<document.classgrade.total.value;i++) {
		var user = document.classgrade["ctr"+i].value;
		var resetscore = document.classgrade["GD_"+user+"_"+partid+"_awarded"];
		resetscore.value = document.classgrade["GD_"+user+"_"+partid+"_awarded_s"].value;
		var resettries = document.classgrade["GD_"+user+"_"+partid+"_tries"];
		resettries.value = document.classgrade["GD_"+user+"_"+partid+"_tries_s"].value;
		var saveselval   = document.classgrade["GD_"+user+"_"+partid+"_solved_s"].value;
		var selname   = document.classgrade["GD_"+user+"_"+partid+"_solved"];
		if (saveselval == "excused") {
		    if (selname[1].selected == false) { selname[1].selected = true;}
		} else {
		    if (selname[0].selected == false) {selname[0].selected = true};
		}
	    }
	}
    }

</script>
VIEWJAVASCRIPT
}

#--- show scores for a section or whole class w/ option to change/update a score
sub viewgrades {
    my ($request) = shift;
    &viewgrades_js($request);

    my ($symb,$url) = ($ENV{'form.symb'},$ENV{'form.url'}); 
    #need to make sure we have the correct data for later EXT calls, 
    #thus invalidate the cache
    &Apache::lonnet::devalidatecourseresdata(
                 $ENV{'course.'.$ENV{'request.course.id'}.'.num'},
                 $ENV{'course.'.$ENV{'request.course.id'}.'.domain'});
    &Apache::lonnet::clear_EXT_cache_status();

    my $result='<h3><font color="#339933">'.&mt('Manual Grading').'</font></h3>';
    $result.='<font size=+1><b>Current Resource: </b>'.$ENV{'form.probTitle'}.'</font>'."\n";

    #view individual student submission form - called using Javascript viewOneStudent
    $result.=&jscriptNform($url,$symb);

    #beginning of class grading form
    $result.= '<form action="/adm/grades" method="post" name="classgrade">'."\n".
	'<input type="hidden" name="symb"    value="'.$symb.'" />'."\n".
	'<input type="hidden" name="url"     value="'.$url.'" />'."\n".
	'<input type="hidden" name="command" value="editgrades" />'."\n".
	'<input type="hidden" name="section" value="'.$ENV{'form.section'}.'" />'."\n".
	'<input type="hidden" name="saveState" value="'.$ENV{'form.saveState'}.'" />'."\n".
	'<input type="hidden" name="Status" value="'.$ENV{'form.Status'}.'" />'."\n".
	'<input type="hidden" name="probTitle" value="'.$ENV{'form.probTitle'}.'" />'."\n";

    my $sectionClass;
    if ($ENV{'form.section'} eq 'all') {
	$sectionClass='Class </h3>';
    } elsif ($ENV{'form.section'} eq 'none') {
	$sectionClass='Students in no Section </h3>';
    } else {
	$sectionClass='Students in Section '.$ENV{'form.section'}.'</h3>';
    }
    $result.='<h3>Assign Common Grade To '.$sectionClass;
    $result.= '<table border=0><tr><td bgcolor="#777777">'."\n".
	'<table border=0><tr bgcolor="#ffffdd"><td>';
    #radio buttons/text box for assigning points for a section or class.
    #handles different parts of a problem
    my ($partlist,$handgrade) = &response_type($url,$symb);
    my %weight = ();
    my $ctsparts = 0;
    $result.='<table border="0">';
    my %seen = ();
    for (sort keys(%$handgrade)) {
	my ($partid,$respid) = split (/_/,$_,2);
	next if $seen{$partid};
	$seen{$partid}++;
	my $handgrade=$$handgrade{$_};
	my $wgt = &Apache::lonnet::EXT('resource.'.$partid.'.weight',$symb);
	$weight{$partid} = $wgt eq '' ? '1' : $wgt;

	$result.='<input type="hidden" name="partid_'.
	    $ctsparts.'" value="'.$partid.'" />'."\n";
	$result.='<input type="hidden" name="weight_'.
	    $partid.'" value="'.$weight{$partid}.'" />'."\n";
	my $display_part=&get_display_part($partid,$url,$symb);
	$result.='<tr><td><b>Part:</b> '.$display_part.'&nbsp; &nbsp;<b>Point:</b> </td><td>';
	$result.='<table border="0"><tr>';  
	my $ctr = 0;
	while ($ctr<=$weight{$partid}) { # display radio buttons in a nice table 10 across
	    $result.= '<td><input type="radio" name="RADVAL_'.$partid.'" '.
		'onclick="javascript:writePoint(\''.$partid.'\','.$weight{$partid}.
		','.$ctr.')" />'.$ctr."</td>\n";
	    $result.=(($ctr+1)%10 == 0 ? '</tr><tr>' : '');
	    $ctr++;
	}
	$result.='</tr></table>';
	$result.= '</td><td><b> or </b><input type="text" name="TEXTVAL_'.
	    $partid.'" size="4" '.'onChange="javascript:writePoint(\''.
		$partid.'\','.$weight{$partid}.',\'textval\')" /> /'.
	    $weight{$partid}.' (problem weight)</td>'."\n";
	$result.= '</td><td><select name="SELVAL_'.$partid.'"'.
	    'onChange="javascript:writeRadText(\''.$partid.'\','.
		$weight{$partid}.')"> '.
	    '<option selected="on"> </option>'.
	    '<option>excused</option>'.
	    '<option>reset status</option></select></td></tr>'."\n";
	$ctsparts++;
    }
    $result.='</table>'.'</td></tr></table>'.'</td></tr></table>'."\n".
	'<input type="hidden" name="totalparts" value="'.$ctsparts.'" />';
    $result.='<input type="button" value="Reset" '.
	'onClick="javascript:resetEntry('.$ctsparts.');" TARGET=_self>';

    #table listing all the students in a section/class
    #header of table
    $result.= '<h3>Assign Grade to Specific Students in '.$sectionClass;
    $result.= '<table border=0><tr><td bgcolor="#777777">'."\n".
	'<table border=0><tr bgcolor="#deffff"><td>&nbsp;<b>No.</b>&nbsp;</td>'.
	'<td>'.&nameUserString('header')."</td>\n";
    my (@parts) = sort(&getpartlist($url,$symb));
    foreach my $part (@parts) {
	my $display=&Apache::lonnet::metadata($url,$part.'.display');
	$display =~ s|^Number of Attempts|Tries<br />|; # makes the column narrower
	if  (!$display) { $display = &Apache::lonnet::metadata($url,$part.'.name'); }
	my ($partid) = &split_part_type($part);
	my $display_part=&get_display_part($partid,$url,$symb);
	if ($display =~ /^Partial Credit Factor/) {
	    $result.='<td><b>Score Part:</b> '.$display_part.
		' <br /><b>(weight = '.$weight{$partid}.')</b></td>'."\n";
	    next;
	} else {
	    $display =~s/\[Part: \Q$partid\E\]/Part:<\/b> $display_part/;
	}
	$display =~ s|Problem Status|Grade Status<br />|;
	$result.='<td><b>'.$display.'</td>'."\n";
    }
    $result.='</tr>';

    #get info for each student
    #list all the students - with points and grade status
    my (undef,undef,$fullname) = &getclasslist($ENV{'form.section'},'1');
    my $ctr = 0;
    foreach (sort {lc($$fullname{$a}) cmp lc($$fullname{$b}) } keys %$fullname) {
	my $uname = $_;
	$uname=~s/:/_/;
	$result.='<input type="hidden" name="ctr'.$ctr.'" value="'.$uname.'" />'."\n";
	$ctr++;
	$result.=&viewstudentgrade($url,$symb,$ENV{'request.course.id'},
				   $_,$$fullname{$_},\@parts,\%weight,$ctr);
    }
    $result.='</table></td></tr></table>';
    $result.='<input type="hidden" name="total" value="'.$ctr.'" />'."\n";
    $result.='<input type="button" value="Save" '.
	'onClick="javascript:submit();" TARGET=_self /></form>'."\n";
    if (scalar(%$fullname) eq 0) {
	my $colspan=3+scalar(@parts);
	$result='<font color="red">There are no students in section "'.$ENV{'form.section'}.
	    '" with enrollment status "'.$ENV{'form.Status'}.'" to modify or grade.</font>';
    }
    $result.=&show_grading_menu_form($symb,$url);
    return $result;
}

#--- call by previous routine to display each student
sub viewstudentgrade {
    my ($url,$symb,$courseid,$student,$fullname,$parts,$weight,$ctr) = @_;
    my ($uname,$udom) = split(/:/,$student);
    $student=~s/:/_/;
    my %record=&Apache::lonnet::restore($symb,$courseid,$udom,$uname);
    my $result='<tr bgcolor="#ffffdd"><td align="right">'.$ctr.'&nbsp;</td><td>&nbsp;'.
	'<a href="javascript:viewOneStudent(\''.$uname.'\',\''.$udom.
	'\')"; TARGET=_self>'.$fullname.'</a> '.
	'<font color="#999999">('.$uname.($ENV{'user.domain'} eq $udom ? '' : ':'.$udom).')</font></td>'."\n";
    foreach my $apart (@$parts) {
	my ($part,$type) = &split_part_type($apart);
	my $score=$record{"resource.$part.$type"};
	if ($type eq 'awarded') {
	    my $pts = $score eq '' ? '' : $score*$$weight{$part};
	    $result.='<input type="hidden" name="'.
		'GD_'.$student.'_'.$part.'_awarded_s" value="'.$pts.'" />'."\n";
	    $result.='<td align="middle"><input type="text" name="'.
		'GD_'.$student.'_'.$part.'_awarded" '.
		'onChange="javascript:changeSelect(\''.$part.'\',\''.$student.
		'\')" value="'.$pts.'" size="4" /></td>'."\n";
	} elsif ($type eq 'solved') {
	    my ($status,$foo)=split(/_/,$score,2);
	    $status = 'nothing' if ($status eq '');
	    $result.='<input type="hidden" name="'.'GD_'.$student.'_'.
		$part.'_solved_s" value="'.$status.'" />'."\n";
	    $result.='<td align="middle">&nbsp;<select name="'.
		'GD_'.$student.'_'.$part.'_solved" '.
		'onChange="javascript:changeOneScore(\''.$part.'\',\''.$student.'\')" >'."\n";
	    $result.= (($status eq 'excused') ? '<option> </option><option selected="on">excused</option>' 
		: '<option selected="on"> </option><option>excused</option>')."\n";
	    $result.='<option>reset status</option>';
	    $result.="</select>&nbsp;</td>\n";
	} else {
	    $result.='<input type="hidden" name="'.
		'GD_'.$student.'_'.$part.'_'.$type.'_s" value="'.$score.'" />'.
		    "\n";
	    $result.='<td align="middle"><input type="text" name="'.
		'GD_'.$student.'_'.$part.'_'.$type.'" '.
		'value="'.$score.'" size="4" /></td>'."\n";
	}
    }
    $result.='</tr>';
    return $result;
}

#--- change scores for all the students in a section/class
#    record does not get update if unchanged
sub editgrades {
    my ($request) = @_;

    my $symb=$ENV{'form.symb'};
    my $url =$ENV{'form.url'};
    my $title='<h3><font color="#339933">Current Grade Status</font></h3>';
    $title.='<font size=+1><b>Current Resource: </b>'.$ENV{'form.probTitle'}.'</font><br />'."\n";
    $title.='<font size=+1><b>Section: </b>'.$ENV{'form.section'}.'</font>'."\n";

    my $result= '<table border="0"><tr><td bgcolor="#777777">'."\n";
    $result.= '<table border="0"><tr bgcolor="#deffff">'.
	'<td rowspan=2 valign="center">&nbsp;<b>No.</b>&nbsp;</td>'.
	'<td rowspan=2 valign="center">'.&nameUserString('header')."</td>\n";

    my %scoreptr = (
		    'correct'  =>'correct_by_override',
		    'incorrect'=>'incorrect_by_override',
		    'excused'  =>'excused',
		    'ungraded' =>'ungraded_attempted',
		    'nothing'  => '',
		    );
    my ($classlist,undef,$fullname) = &getclasslist($ENV{'form.section'},'0');

    my (@partid);
    my %weight = ();
    my %columns = ();
    my ($i,$ctr,$count,$rec_update) = (0,0,0,0);

    my (@parts) = sort(&getpartlist($url,$symb));
    my $header;
    while ($ctr < $ENV{'form.totalparts'}) {
	my $partid = $ENV{'form.partid_'.$ctr};
	push @partid,$partid;
	$weight{$partid} = $ENV{'form.weight_'.$partid};
	$ctr++;
    }
    foreach my $partid (@partid) {
	$header .= '<td align="center">&nbsp;<b>Old Score</b>&nbsp;</td>'.
	    '<td align="center">&nbsp;<b>New Score</b>&nbsp;</td>';
	$columns{$partid}=2;
	foreach my $stores (@parts) {
	    my ($part,$type) = &split_part_type($stores);
	    if ($part !~ m/^\Q$partid\E/) { next;}
	    if ($type eq 'awarded' || $type eq 'solved') { next; }
	    my $display=&Apache::lonnet::metadata($url,$stores.'.display');
	    $display =~ s/\[Part: (\w)+\]//;
	    $display =~ s/Number of Attempts/Tries/;
	    $header .= '<td align="center">&nbsp;<b>Old '.$display.'</b>&nbsp;</td>'.
		'<td align="center">&nbsp;<b>New '.$display.'</b>&nbsp;</td>';
	    $columns{$partid}+=2;
	}
    }
    foreach my $partid (@partid) {
	my $display_part=&get_display_part($partid,$url,$symb);
	$result .= '<td colspan="'.$columns{$partid}.
	    '" align="center"><b>Part:</b> '.$display_part.
	    ' (Weight = '.$weight{$partid}.')</td>';

    }
    $result .= '</tr><tr bgcolor="#deffff">';
    $result .= $header;
    $result .= '</tr>'."\n";
    my $noupdate;
    my ($updateCtr,$noupdateCtr) = (1,1);
    for ($i=0; $i<$ENV{'form.total'}; $i++) {
	my $line;
	my $user = $ENV{'form.ctr'.$i};
	my $usercolon = $user;
	$usercolon =~s/_/:/;
	my ($uname,$udom)=split(/_/,$user);
	my %newrecord;
	my $updateflag = 0;
	$line .= '<td>'.&nameUserString(undef,$$fullname{$usercolon},$uname,$udom).'</td>';
	my $usec=$classlist->{"$uname:$udom"}[5];
	if (!&canmodify($usec)) {
	    my $numcols=scalar(@partid)*4+2;
	    $noupdate.=$line."<td colspan=\"$numcols\"><font color=\"red\">Not allowed to modify student</font></td></tr>";
	    next;
	}
	foreach (@partid) {
	    my $old_aw    = $ENV{'form.GD_'.$user.'_'.$_.'_awarded_s'};
	    my $old_part_pcr = $old_aw/($weight{$_} ne '0' ? $weight{$_}:1);
	    my $old_part  = $old_aw eq '' ? '' : $old_part_pcr;
	    my $old_score = $scoreptr{$ENV{'form.GD_'.$user.'_'.$_.'_solved_s'}};

	    my $awarded   = $ENV{'form.GD_'.$user.'_'.$_.'_awarded'};
	    my $pcr       = $awarded/($weight{$_} ne '0' ? $weight{$_} : 1);
	    my $partial   = $awarded eq '' ? '' : $pcr;
	    my $score;
	    if ($partial eq '') {
		$score = $scoreptr{$ENV{'form.GD_'.$user.'_'.$_.'_solved_s'}};
	    } elsif ($partial > 0) {
		$score = 'correct_by_override';
	    } elsif ($partial == 0) {
		$score = 'incorrect_by_override';
	    }
	    my $dropMenu = $ENV{'form.GD_'.$user.'_'.$_.'_solved'};
	    $score = 'excused' if (($dropMenu eq 'excused') && ($score ne 'excused'));

	    if ($dropMenu eq 'reset status' &&
		$old_score ne '') { # ignore if no previous attempts => nothing to reset
		$newrecord{'resource.'.$_.'.tries'} = 0;
		$newrecord{'resource.'.$_.'.solved'} = '';
		$newrecord{'resource.'.$_.'.award'} = '';
		$newrecord{'resource.'.$_.'.awarded'} = 0;
		$newrecord{'resource.'.$_.'.regrader'}="$ENV{'user.name'}:$ENV{'user.domain'}";
		$updateflag = 1;
	    } elsif (!($old_part eq $partial && $old_score eq $score)) {
		$updateflag = 1;
		$newrecord{'resource.'.$_.'.awarded'}  = $partial if $partial ne '';
		$newrecord{'resource.'.$_.'.solved'}   = $score;
		$rec_update++;
	    }

	    $line .= '<td align="center">'.$old_aw.'&nbsp;</td>'.
		'<td align="center">'.$awarded.
		($score eq 'excused' ? $score : '').'&nbsp;</td>';


	    my $partid=$_;
	    foreach my $stores (@parts) {
		my ($part,$type) = &split_part_type($stores);
		if ($part !~ m/^\Q$partid\E/) { next;}
		if ($type eq 'awarded' || $type eq 'solved') { next; }
		my $old_aw    = $ENV{'form.GD_'.$user.'_'.$part.'_'.$type.'_s'};
		my $awarded   = $ENV{'form.GD_'.$user.'_'.$part.'_'.$type};
		if ($awarded ne '' && $awarded ne $old_aw) {
		    $newrecord{'resource.'.$part.'.'.$type}= $awarded;
		    $newrecord{'resource.'.$part.'.regrader'}="$ENV{'user.name'}:$ENV{'user.domain'}";
		    $updateflag=1;
		}
		$line .= '<td align="center">'.$old_aw.'&nbsp;</td>'.
		    '<td align="center">'.$awarded.'&nbsp;</td>';
	    }
	}
	$line.='</tr>'."\n";
	if ($updateflag) {
	    $count++;
	    &Apache::lonnet::cstore(\%newrecord,$symb,$ENV{'request.course.id'},
				    $udom,$uname);
	    $result.='<tr bgcolor="#ffffde"><td align="right">&nbsp;'.$updateCtr.'&nbsp;</td>'.$line;
	    $updateCtr++;
	} else {
	    $noupdate.='<tr bgcolor="#ffffde"><td align="right">&nbsp;'.$noupdateCtr.'&nbsp;</td>'.$line;
	    $noupdateCtr++;
	}
    }
    if ($noupdate) {
#	my $numcols=(scalar(@partid)*(scalar(@parts)-1)*2)+3;
	my $numcols=scalar(@partid)*4+2;
	$result .= '<tr bgcolor="#ffffff"><td align="center" colspan="'.$numcols.'">No Changes Occurred For the Students Below</td></tr><tr bgcolor="#ffffde">'.$noupdate;
    }
    $result .= '</table></td></tr></table>'."\n".
	&show_grading_menu_form ($symb,$url);
    my $msg = '<br /><b>Number of records updated = '.$rec_update.
	' for '.$count.' student'.($count <= 1 ? '' : 's').'.</b><br />'.
	'<b>Total number of students = '.$ENV{'form.total'}.'</b><br />';
    return $title.$msg.$result;
}

sub split_part_type {
    my ($partstr) = @_;
    my ($temp,@allparts)=split(/_/,$partstr);
    my $type=pop(@allparts);
    my $part=join('.',@allparts);
    return ($part,$type);
}

#------------- end of section for handling grading by section/class ---------
#
#----------------------------------------------------------------------------


#----------------------------------------------------------------------------
#
#-------------------------- Next few routines handles grading by csv upload
#
#--- Javascript to handle csv upload
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 $javascript;
    if ($ENV{'form.upfile_associate'} eq 'reverse') {
	$javascript=&csvupload_javascript_reverse_associate();
    } else {
	$javascript=&csvupload_javascript_forward_associate();
    }

    my ($result) = &showResourceInfo($url,$ENV{'form.probTitle'});

    $request->print(<<ENDPICK);
<form method="post" enctype="multipart/form-data" action="/adm/grades" name="gradesupload">
<h3><font color="#339933">Uploading Class Grades</font></h3>
$result
<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="$url" />
<input type="hidden" name="saveState"  value="$ENV{'form.saveState'}" />
<input type="hidden" name="probTitle"  value="$ENV{'form.probTitle'}" />
<input type="hidden" name="command"    value="csvuploadassign" />
<hr />
<script type="text/javascript" language="Javascript">
$javascript
</script>
ENDPICK
    return '';

}

sub csvupload_fields {
    my ($url,$symb) = @_;
    my (@parts) = &getpartlist($url,$symb);
    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 upcsvScores_form {
    my ($request) = shift;
    my ($symb,$url)=&get_symb_and_url($request);
    if (!$symb) {return '';}
    my $result =<<CSVFORMJS;
<script type="text/javascript" language="javascript">
    function checkUpload(formname) {
	if (formname.upfile.value == "") {
	    alert("Please use the browse button to select a file from your local directory.");
	    return false;
	}
	formname.submit();
    }
    </script>
CSVFORMJS
    $ENV{'form.probTitle'} = &Apache::lonnet::gettitle($symb);
    my ($table) = &showResourceInfo($url,$ENV{'form.probTitle'});
    $result.=$table;
    $result.='<br /><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 current 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="$url" />
<input type="hidden" name="command" value="csvuploadmap" />
<input type="hidden" name="probTitle" value="$ENV{'form.probTitle'}" />
<input type="hidden" name="saveState"  value="$ENV{'form.saveState'}" />
$upfile_select
<br /><input type="button" onClick="javascript:checkUpload(this.form);" value="Upload Scores" />

</form>
ENDUPFORM
    $result.='</td></tr></table>'."\n";
    $result.='</td></tr></table><br /><br />'."\n";
    $result.=&show_grading_menu_form($symb,$url);
    return $result;
}


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 ($i,$keyfields);
    if (@records) {
	my @fields=&csvupload_fields($url,$symb);

	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);
    $request->print(&show_grading_menu_form($symb,$url));

    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 ($classlist) = &getclasslist('all',0);
    my @notallowed;
    my @skipped;
    my $countdone=0;
    foreach my $grade (@gradedata) {
	my %entries=&Apache::loncommon::record_sep($grade);
	my $username=$entries{$fields{'username'}};
	$username=~s/\s//g;
	my $domain=$entries{$fields{'domain'}};
	$domain=~s/\s//g;
	if (!exists($$classlist{"$username:$domain"})) {
	    push(@skipped,"$username:$domain");
	    next;
	}
	my $usec=$classlist->{"$username:$domain"}[5];
	if (!&canmodify($usec)) {
	    push(@notallowed,"$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('<p<font size="+1"><b>Skipped Students</b></font></p>');
	foreach my $student (@skipped) { $request->print("$student<br />\n"); }
    }
    if (@notallowed) {
	$request->print('<p><font size="+1" color="red"><b>Students Not Allowed to Modify</b></font></p>');
	foreach my $student (@notallowed) { $request->print("$student<br />\n"); }
    }
    $request->print("<br />\n");
    $request->print(&show_grading_menu_form($symb,$url));
    return '';
}
#------------- end of section for handling csv file upload ---------
#
#-------------------------------------------------------------------
#
#-------------- Next few routines handle grading by page/sequence
#
#--- Select a page/sequence and a student to grade
sub pickStudentPage {
    my ($request) = shift;

    $request->print(<<LISTJAVASCRIPT);
<script type="text/javascript" language="javascript">

function checkPickOne(formname) {
    if (radioSelection(formname.student) == null) {
	alert("Please select the student you wish to grade.");
	return;
    }
    ptr = pullDownSelection(formname.selectpage);
    formname.page.value = formname["page"+ptr].value;
    formname.title.value = formname["title"+ptr].value;
    formname.submit();
}

</script>
LISTJAVASCRIPT
    &commonJSfunctions($request);
    my ($symb,$url) = &get_symb_and_url($request);
    my $cdom      = $ENV{"course.$ENV{'request.course.id'}.domain"};
    my $cnum      = $ENV{"course.$ENV{'request.course.id'}.num"};
    my $getsec    = $ENV{'form.section'} eq '' ? 'all' : $ENV{'form.section'};

    my $result='<h3><font color="#339933">&nbsp;'.
	'Manual Grading by Page or Sequence</font></h3>';

    $result.='<form action="/adm/grades" method="post" name="displayPage">'."\n";
    $result.='&nbsp;<b>Problems from:</b> <select name="selectpage">'."\n";
    my ($titles,$symbx) = &getSymbMap($request);
    my ($curpage) =&Apache::lonnet::decode_symb($symb); 
#    my ($curpage,$mapId) =&Apache::lonnet::decode_symb($symb); 
#    my $type=($curpage =~ /\.(page|sequence)/);
    my $ctr=0;
    foreach (@$titles) {
	my ($minder,$showtitle) = ($_ =~ /(\d+)\.(.*)/);
	$result.='<option value="'.$ctr.'" '.
	    ($$symbx{$_} =~ /$curpage$/ ? 'selected="on"' : '').
	    '>'.$showtitle.'</option>'."\n";
	$ctr++;
    }
    $result.= '</select>'."<br>\n";
    $ctr=0;
    foreach (@$titles) {
	my ($minder,$showtitle) = ($_ =~ /(\d+)\.(.*)/);
	$result.='<input type="hidden" name="page'.$ctr.'" value="'.$$symbx{$_}.'" />'."\n";
	$result.='<input type="hidden" name="title'.$ctr.'" value="'.$showtitle.'" />'."\n";
	$ctr++;
    }
    $result.='<input type="hidden" name="page" />'."\n".
	'<input type="hidden" name="title" />'."\n";

    $result.='&nbsp;<b>View Problems Text: </b><input type="radio" name="vProb" value="no" checked="on" /> no '."\n".
	'<input type="radio" name="vProb" value="yes" /> yes '."<br>\n";

    $result.='&nbsp;<b>Submission Details: </b>'.
	'<input type="radio" name="lastSub" value="none" /> none'."\n".
	'<input type="radio" name="lastSub" value="datesub" checked /> by dates and submissions'."\n".
	'<input type="radio" name="lastSub" value="all" /> all details'."\n";

    $result.='<input type="hidden" name="section"     value="'.$getsec.'" />'."\n".
	'<input type="hidden" name="Status"  value="'.$ENV{'form.Status'}.'" />'."\n".
	'<input type="hidden" name="command" value="displayPage" />'."\n".
	'<input type="hidden" name="url"     value="'.$url.'" />'."\n".
	'<input type="hidden" name="symb"    value="'.$symb.'" />'."\n".
	'<input type="hidden" name="saveState" value="'.$ENV{'form.saveState'}.'" />'."<br />\n";

    $result.='&nbsp;<input type="button" '.
	'onClick="javascript:checkPickOne(this.form);"value="Next->" /><br />'."\n";

    $request->print($result);

    my $studentTable.='&nbsp;<b>Select a student you wish to grade and then click on the Next button.</b><br>'.
	'<table border="0"><tr><td bgcolor="#777777">'.
	'<table border="0"><tr bgcolor="#e6ffff">'.
	'<td align="right">&nbsp;<b>No.</b></td>'.
	'<td>'.&nameUserString('header').'</td>'.
	'<td align="right">&nbsp;<b>No.</b></td>'.
	'<td>'.&nameUserString('header').'</td></tr>';
 
    my (undef,undef,$fullname) = &getclasslist($getsec,'1');
    my $ptr = 1;
    foreach my $student (sort {lc($$fullname{$a}) cmp lc($$fullname{$b}) } keys %$fullname) {
	my ($uname,$udom) = split(/:/,$student);
	$studentTable.=($ptr%2 == 1 ? '<tr bgcolor="#ffffe6">' : '</td>');
	$studentTable.='<td align="right">'.$ptr.'&nbsp;</td>';
	$studentTable.='<td>&nbsp;<input type="radio" name="student" value="'.$student.'" /> '
	    .&nameUserString(undef,$$fullname{$student},$uname,$udom)."\n";
	$studentTable.=($ptr%2 == 0 ? '</td></tr>' : '');
	$ptr++;
    }
    $studentTable.='</td><td>&nbsp;</td><td>&nbsp;' if ($ptr%2 == 0);
    $studentTable.='</td></tr></table></td></tr></table>'."\n";
    $studentTable.='<input type="button" '.
	'onClick="javascript:checkPickOne(this.form);"value="Next->" /></form>'."\n";

    $studentTable.=&show_grading_menu_form($symb,$url);
    $request->print($studentTable);

    return '';
}

sub getSymbMap {
    my ($request) = @_;
    my $navmap = Apache::lonnavmaps::navmap->new();

    my %symbx = ();
    my @titles = ();
    my $minder = 0;

    # Gather every sequence that has problems.
    my @sequences = $navmap->retrieveResources(undef, sub { shift->is_map(); }, 1);
    for my $sequence ($navmap->getById('0.0'), @sequences) {
	if ($navmap->hasResource($sequence, sub { shift->is_problem(); }, 0) ) {
	    my $title = $minder.'.'.$sequence->compTitle();
	    push @titles, $title; # minder in case two titles are identical
	    $symbx{$title} = $sequence->symb();
	    $minder++;
	}
    }

    $navmap->untieHashes();
    return \@titles,\%symbx;
}

#
#--- Displays a page/sequence w/wo problems, w/wo submissions
sub displayPage {
    my ($request) = shift;

    my ($symb,$url) = &get_symb_and_url($request);
    my $cdom      = $ENV{"course.$ENV{'request.course.id'}.domain"};
    my $cnum      = $ENV{"course.$ENV{'request.course.id'}.num"};
    my $getsec    = $ENV{'form.section'} eq '' ? 'all' : $ENV{'form.section'};
    my $pageTitle = $ENV{'form.page'};
    my ($classlist,undef,$fullname) = &getclasslist($getsec,'1');
    my ($uname,$udom) = split(/:/,$ENV{'form.student'});
    my $usec=$classlist->{$ENV{'form.student'}}[5];

    #need to make sure we have the correct data for later EXT calls, 
    #thus invalidate the cache
    &Apache::lonnet::devalidatecourseresdata(
                 $ENV{'course.'.$ENV{'request.course.id'}.'.num'},
                 $ENV{'course.'.$ENV{'request.course.id'}.'.domain'});
    &Apache::lonnet::clear_EXT_cache_status();

    if (!&canview($usec)) {
	$request->print('<font color="red">Unable to view requested student.('.$ENV{'form.student'}.')</font>');
	$request->print(&show_grading_menu_form($symb,$url));
	return;
    }
    my $result='<h3><font color="#339933">&nbsp;'.$ENV{'form.title'}.'</font></h3>';
    $result.='<h3>&nbsp;Student: '.&nameUserString(undef,$$fullname{$ENV{'form.student'}},$uname,$udom).
	'</h3>'."\n";
    &sub_page_js($request);
    $request->print($result);

    my $navmap = Apache::lonnavmaps::navmap->new();
    my ($mapUrl, $id, $resUrl)=&Apache::lonnet::decode_symb($ENV{'form.page'});
    my $map = $navmap->getResourceByUrl($resUrl); # add to navmaps

    my $iterator = $navmap->getIterator($map->map_start(),
					$map->map_finish());

    my $studentTable='<form action="/adm/grades" method="post" name="gradePage">'."\n".
	'<input type="hidden" name="command" value="gradeByPage" />'."\n".
	'<input type="hidden" name="fullname" value="'.$$fullname{$ENV{'form.student'}}.'" />'."\n".
	'<input type="hidden" name="student" value="'.$ENV{'form.student'}.'" />'."\n".
	'<input type="hidden" name="page"    value="'.$pageTitle.'" />'."\n".
	'<input type="hidden" name="title"   value="'.$ENV{'form.title'}.'" />'."\n".
	'<input type="hidden" name="url"     value="'.$url.'" />'."\n".
	'<input type="hidden" name="symb"    value="'.$symb.'" />'."\n".
	'<input type="hidden" name="overRideScore" value="no" />'."\n".
	'<input type="hidden" name="saveState" value="'.$ENV{'form.saveState'}.'" />'."\n";

    my $checkIcon = '<img src="'.$request->dir_config('lonIconsURL').
	'/check.gif" height="16" border="0" />';

    $studentTable.='&nbsp;<b>Note:</b> Problems graded correct by the computer are marked with a '.$checkIcon.
	' symbol.'."\n".
	'<table border="0"><tr><td bgcolor="#777777">'.
	'<table border="0"><tr bgcolor="#e6ffff">'.
	'<td align="center"><b>&nbsp;Prob.&nbsp;</b></td>'.
	'<td><b>&nbsp;'.($ENV{'form.vProb'} eq 'no' ? 'Title' : 'Problem Text').'/Grade</b></td></tr>';

    my ($depth,$question,$prob) = (1,1,1);
    $iterator->next(); # skip the first BEGIN_MAP
    my $curRes = $iterator->next(); # for "current resource"
    while ($depth > 0) {
        if($curRes == $iterator->BEGIN_MAP) { $depth++; }
        if($curRes == $iterator->END_MAP) { $depth--; }

        if (ref($curRes) && $curRes->is_problem()) {
	    my $parts = $curRes->parts();
            my $title = $curRes->compTitle();
	    my $symbx = $curRes->symb();
	    $studentTable.='<tr bgcolor="#ffffe6"><td align="center" valign="top" >'.$prob.
		(scalar(@{$parts}) == 1 ? '' : '<br>('.scalar(@{$parts}).'&nbsp;parts)').'</td>';
	    $studentTable.='<td valign="top">';
	    if ($ENV{'form.vProb'} eq 'yes' ) {
		$studentTable.=&show_problem($request,$symbx,$uname,$udom,1,
					     undef,'both');
	    } else {
		my $companswer = &Apache::loncommon::get_student_answers($symbx,$uname,$udom,$ENV{'request.course.id'});
		$companswer =~ s|<form(.*?)>||g;
		$companswer =~ s|</form>||g;
#		while ($companswer =~ /(<a href\=\"javascript:newWindow.*?Script Vars<\/a>)/s) { #<a href="javascript:newWindow</a>
#		    $companswer =~ s/$1/ /ms;
#		    $request->print('match='.$1."<br>\n");
#		}
#		$companswer =~ s|<table border=\"1\">|<table border=\"0\">|g;
		$studentTable.='&nbsp;<b>'.$title.'</b>&nbsp;<br>&nbsp;<b>Correct answer:</b><br>'.$companswer;
	    }

	    my %record = &Apache::lonnet::restore($symbx,$ENV{'request.course.id'},$udom,$uname);

	    if ($ENV{'form.lastSub'} eq 'datesub') {
		if ($record{'version'} eq '') {
		    $studentTable.='<br />&nbsp;<font color="red">No recorded submission for this problem</font><br />';
		} else {
		    my %responseType = ();
		    foreach my $partid (@{$parts}) {
			my @responseIds =$curRes->responseIds($partid);
			my @responseType =$curRes->responseType($partid);
			my %responseIds;
			for (my $i=0;$i<=$#responseIds;$i++) {
			    $responseIds{$responseIds[$i]}=$responseType[$i];
			}
			$responseType{$partid} = \%responseIds;
		    }
		    $studentTable.= &displaySubByDates($symbx,\%record,$parts,\%responseType,$checkIcon,$uname,$udom);

		}
	    } elsif ($ENV{'form.lastSub'} eq 'all') {
		my $last = ($ENV{'form.lastSub'} eq 'last' ? 'last' : '');
		$studentTable.=&Apache::loncommon::get_previous_attempt($symbx,$uname,$udom,
									$ENV{'request.course.id'},
									'','.submission');
 
	    }
	    if (&canmodify($usec)) {
		foreach my $partid (@{$parts}) {
		    $studentTable.=&gradeBox($request,$symbx,$uname,$udom,$question,$partid,\%record);
		    $studentTable.='<input type="hidden" name="q_'.$question.'" value="'.$partid.'" />'."\n";
		    $question++;
		}
		$prob++;
	    }
	    $studentTable.='</td></tr>';

	}
        $curRes = $iterator->next();
    }

    $navmap->untieHashes();

    $studentTable.='</td></tr></table></td></tr></table>'."\n".
	'<input type="button" value="Save" '.
	'onClick="javascript:checkSubmitPage(this.form,'.$question.');" TARGET=_self />'.
	'</form>'."\n";
    $studentTable.=&show_grading_menu_form($symb,$url);
    $request->print($studentTable);

    return '';
}

sub displaySubByDates {
    my ($symb,$record,$parts,$responseType,$checkIcon,$uname,$udom) = @_;
    my $studentTable='<table border="0" width="100%"><tr><td bgcolor="#777777">'.
	'<table border="0" width="100%"><tr bgcolor="#e6ffff">'.
	'<td><b>Date/Time</b></td>'.
	'<td><b>Submission</b></td>'.
	'<td><b>Status&nbsp;</b></td></tr>';
    my ($version);
    my %mark;
    my %orders;
    $mark{'correct_by_student'} = $checkIcon;
    if (!exists($$record{'1:timestamp'})) {
	return '<br />&nbsp;<font color="red">Nothing submitted - no attempts</font><br />';
    }
    for ($version=1;$version<=$$record{'version'};$version++) {
	my $timestamp = scalar(localtime($$record{$version.':timestamp'}));
	$studentTable.='<tr bgcolor="#ffffff" valign="top"><td>'.$timestamp.'</td>';
	my @versionKeys = split(/\:/,$$record{$version.':keys'});
	my @displaySub = ();
	foreach my $partid (@{$parts}) {
	    my @matchKey = sort(grep /^resource\.\Q$partid\E\..*?\.submission$/,@versionKeys);
#	    next if ($$record{"$version:resource.$partid.solved"} eq '');
	    my $display_part=&get_display_part($partid,undef,$symb);
	    foreach my $matchKey (@matchKey) {
		if (exists($$record{$version.':'.$matchKey}) &&
		    $$record{$version.':'.$matchKey} ne '') {
		    my ($responseId)=($matchKey=~ /^resource\.\Q$partid\E\.(.*?)\.submission$/);
		    $displaySub[0].='<b>Part:</b>&nbsp;'.$display_part.'&nbsp;';
		    $displaySub[0].='<font color="#999999">(ID&nbsp;'.
			$responseId.')</font>&nbsp;<b>';
		    if ($$record{"$version:resource.$partid.tries"} eq '') {
			$displaySub[0].='Trial&nbsp;not&nbsp;counted';
		    } else {
			$displaySub[0].='Trial&nbsp;'.
			    $$record{"$version:resource.$partid.tries"};
		    }
		    my $responseType=$responseType->{$partid}->{$responseId};
		    if (!exists($orders{$partid})) { $orders{$partid}={}; }
		    if (!exists($orders{$partid}->{$responseId})) {
			$orders{$partid}->{$responseId}=
			    &get_order($partid,$responseId,$symb,$uname,$udom);
		    }
		    $displaySub[0].='</b>&nbsp; '.
			&cleanRecord($$record{$version.':'.$matchKey},$responseType,$symb,$partid,$responseId,$record,$orders{$partid}->{$responseId},"$version:").'<br />';
		}
	    }
	    if (exists $$record{"$version:resource.$partid.award"}) {
		$displaySub[1].='<b>Part:</b>&nbsp;'.$display_part.' &nbsp;'.
		    lc($$record{"$version:resource.$partid.award"}).' '.
		    $mark{$$record{"$version:resource.$partid.solved"}}.
		    '<br />';
	    }
	    if (exists $$record{"$version:resource.$partid.regrader"}) {
		$displaySub[2].=$$record{"$version:resource.$partid.regrader"}.
		    ' (<b>'.&mt('Part').':</b> '.$display_part.')';
	    }
	}
	# needed because old essay regrader has not parts info
	if (exists $$record{"$version:resource.regrader"}) {
	    $displaySub[2].=$$record{"$version:resource.regrader"};
	}
	$studentTable.='<td>'.$displaySub[0].'&nbsp;</td><td>'.$displaySub[1];
	if ($displaySub[2]) {
	    $studentTable.='Manually graded by '.$displaySub[2];
	}
	$studentTable.='&nbsp;</td></tr>';
    
    }
    $studentTable.='</table></td></tr></table>';
    return $studentTable;
}

sub updateGradeByPage {
    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'} eq '' ? 'all' : $ENV{'form.section'};
    my $pageTitle = $ENV{'form.page'};
    my ($classlist,undef,$fullname) = &getclasslist($getsec,'1');
    my ($uname,$udom) = split(/:/,$ENV{'form.student'});
    my $usec=$classlist->{$ENV{'form.student'}}[5];
    if (!&canmodify($usec)) {
	$request->print('<font color="red">Unable to modify requested student.('.$ENV{'form.student'}.'</font>');
	$request->print(&show_grading_menu_form($ENV{'form.symb'},$ENV{'form.url'}));
	return;
    }
    my $result='<h3><font color="#339933">&nbsp;'.$ENV{'form.title'}.'</font></h3>';
    $result.='<h3>&nbsp;Student: '.&nameUserString(undef,$ENV{'form.fullname'},$uname,$udom).
	'</h3>'."\n";

    $request->print($result);

    my $navmap = Apache::lonnavmaps::navmap->new();
    my ($mapUrl, $id, $resUrl) = &Apache::lonnet::decode_symb( $ENV{'form.page'});
    my $map = $navmap->getResourceByUrl($resUrl); # add to navmaps

    my $iterator = $navmap->getIterator($map->map_start(),
					$map->map_finish());

    my $studentTable='<table border="0"><tr><td bgcolor="#777777">'.
	'<table border="0"><tr bgcolor="#e6ffff">'.
	'<td align="center"><b>&nbsp;Prob.&nbsp;</b></td>'.
	'<td><b>&nbsp;Title&nbsp;</b></td>'.
	'<td><b>&nbsp;Previous Score&nbsp;</b></td>'.
	'<td><b>&nbsp;New Score&nbsp;</b></td></tr>';

    $iterator->next(); # skip the first BEGIN_MAP
    my $curRes = $iterator->next(); # for "current resource"
    my ($depth,$question,$prob,$changeflag)= (1,1,1,0);
    while ($depth > 0) {
        if($curRes == $iterator->BEGIN_MAP) { $depth++; }
        if($curRes == $iterator->END_MAP) { $depth--; }

        if (ref($curRes) && $curRes->is_problem() && !$curRes->randomout) {
	    my $parts = $curRes->parts();
            my $title = $curRes->compTitle();
	    my $symbx = $curRes->symb();
	    $studentTable.='<tr bgcolor="#ffffe6"><td align="center" valign="top" >'.$prob.
		(scalar(@{$parts}) == 1 ? '' : '<br>('.scalar(@{$parts}).'&nbsp;parts)').'</td>';
	    $studentTable.='<td valign="top">&nbsp;<b>'.$title.'</b>&nbsp;</td>';

	    my %newrecord=();
	    my @displayPts=();
	    foreach my $partid (@{$parts}) {
		my $newpts = $ENV{'form.GD_BOX'.$question.'_'.$partid};
		my $oldpts = $ENV{'form.oldpts'.$question.'_'.$partid};

		my $wgt = $ENV{'form.WGT'.$question.'_'.$partid} != 0 ? 
		    $ENV{'form.WGT'.$question.'_'.$partid} : 1;
		my $partial = $newpts/$wgt;
		my $score;
		if ($partial > 0) {
		    $score = 'correct_by_override';
		} elsif ($newpts ne '') { #empty is taken as 0
		    $score = 'incorrect_by_override';
		}
		my $dropMenu = $ENV{'form.GD_SEL'.$question.'_'.$partid};
		if ($dropMenu eq 'excused') {
		    $partial = '';
		    $score = 'excused';
		} elsif ($dropMenu eq 'reset status'
			 && $ENV{'form.solved'.$question.'_'.$partid} ne '') { #update only if previous record exists
		    $newrecord{'resource.'.$partid.'.tries'} = 0;
		    $newrecord{'resource.'.$partid.'.solved'} = '';
		    $newrecord{'resource.'.$partid.'.award'} = '';
		    $newrecord{'resource.'.$partid.'.awarded'} = 0;
		    $newrecord{'resource.'.$partid.'.regrader'} = "$ENV{'user.name'}:$ENV{'user.domain'}";
		    $changeflag++;
		    $newpts = '';
		}
		my $display_part=&get_display_part($partid,undef,
						   $curRes->symb());
		my $oldstatus = $ENV{'form.solved'.$question.'_'.$partid};
		$displayPts[0].='&nbsp;<b>Part:</b> '.$display_part.' = '.
		    (($oldstatus eq 'excused') ? 'excused' : $oldpts).
		    '&nbsp;<br>';
		$displayPts[1].='&nbsp;<b>Part:</b> '.$display_part.' = '.
		     (($score eq 'excused') ? 'excused' : $newpts).
		    '&nbsp;<br>';

		$question++;
		next if ($dropMenu eq 'reset status' || ($newpts == $oldpts && $score ne 'excused'));

		$newrecord{'resource.'.$partid.'.awarded'}  = $partial if $partial ne '';
		$newrecord{'resource.'.$partid.'.solved'}   = $score if $score ne '';
		$newrecord{'resource.'.$partid.'.regrader'} = "$ENV{'user.name'}:$ENV{'user.domain'}"
		    if (scalar(keys(%newrecord)) > 0);

		$changeflag++;
	    }
	    if (scalar(keys(%newrecord)) > 0) {
		&Apache::lonnet::cstore(\%newrecord,$symbx,$ENV{'request.course.id'},
					$udom,$uname);
	    }

	    $studentTable.='<td valign="top">'.$displayPts[0].'</td>'.
		'<td valign="top">'.$displayPts[1].'</td>'.
		'</tr>';

	    $prob++;
	}
        $curRes = $iterator->next();
    }

    $navmap->untieHashes();

    $studentTable.='</td></tr></table></td></tr></table>';
    $studentTable.=&show_grading_menu_form($ENV{'form.symb'},$ENV{'form.url'});
    my $grademsg=($changeflag == 0 ? 'No score was changed or updated.' :
		  'The scores were changed for '.
		  $changeflag.' problem'.($changeflag == 1 ? '.' : 's.'));
    $request->print($grademsg.$studentTable);

    return '';
}

#-------- end of section for handling grading by page/sequence ---------
#
#-------------------------------------------------------------------

#--------------------Scantron Grading-----------------------------------
#
#------ start of section for handling grading by page/sequence ---------

sub defaultFormData {
    my ($symb,$url)=@_;
    return '
      <input type="hidden" name="symb"    value="'.$symb.'" />'."\n".
     '<input type="hidden" name="url"     value="'.$url.'" />'."\n".
     '<input type="hidden" name="saveState" value="'.$ENV{'form.saveState'}.'" />'."\n".
     '<input type="hidden" name="probTitle" value="'.$ENV{'form.probTitle'}.'" />'."\n";
}

sub getSequenceDropDown {
    my ($request,$symb)=@_;
    my $result='<select name="selectpage">'."\n";
    my ($titles,$symbx) = &getSymbMap($request);
    my ($curpage)=&Apache::lonnet::decode_symb($symb); 
    my $ctr=0;
    foreach (@$titles) {
	my ($minder,$showtitle) = ($_ =~ /(\d+)\.(.*)/);
	$result.='<option value="'.$$symbx{$_}.'" '.
	    ($$symbx{$_} =~ /$curpage$/ ? 'selected="on"' : '').
	    '>'.$showtitle.'</option>'."\n";
	$ctr++;
    }
    $result.= '</select>';
    return $result;
}

sub scantron_filenames {
    my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
    my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
    my @files=&Apache::lonnet::dirlist('userfiles',$cdom,$cname,
				    &Apache::loncommon::propath($cdom,$cname));
    my @possiblenames;
    foreach my $filename (sort(@files)) {
	($filename)=split(/&/,$filename);
	if ($filename!~/^scantron_orig_/) { next ; }
	$filename=~s/^scantron_orig_//;
	push(@possiblenames,$filename);
    }
    return @possiblenames;
}

sub scantron_uploads {
    my ($file2grade) = @_;
    my $result=	'<select name="scantron_selectfile">';
    $result.="<option></option>";
    foreach my $filename (sort(&scantron_filenames())) {
	$result.="<option".($filename eq $file2grade ? ' selected="on"':'').">$filename</option>\n";
    }
    $result.="</select>";
    return $result;
}

sub scantron_scantab {
    my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.'/scantronformat.tab');
    my $result='<select name="scantron_format">'."\n";
    $result.='<option></option>'."\n";
    foreach my $line (<$fh>) {
	my ($name,$descrip)=split(/:/,$line);
	if ($name =~ /^\#/) { next; }
	$result.='<option value="'.$name.'">'.$descrip.'</option>'."\n";
    }
    $result.='</select>'."\n";

    return $result;
}

sub scantron_CODElist {
    my $cdom = $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
    my $cnum = $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
    my @names=&Apache::lonnet::getkeys('CODEs',$cdom,$cnum);
    my $namechoice='<option></option>';
    foreach my $name (sort(@names)) {
	if ($name =~ /^error: 2 /) { next; }
	$namechoice.='<option value="'.$name.'">'.$name.'</option>';
    }
    $namechoice='<select name="scantron_CODElist">'.$namechoice.'</select>';
    return $namechoice;
}

sub scantron_CODEunique {
    my $result='<nobr>
                 <input type="radio" name="scantron_CODEunique"
                        value="Yes" checked="on" /> Yes
                </nobr>
                <nobr>
                 <input type="radio" name="scantron_CODEunique"
                        value="No" /> No
                </nobr>';
    return $result;
}

sub scantron_selectphase {
    my ($r,$file2grade) = @_;
    my ($symb,$url)=&get_symb_and_url($r);
    if (!$symb) {return '';}
    my $sequence_selector=&getSequenceDropDown($r,$symb);
    my $default_form_data=&defaultFormData($symb,$url);
    my $grading_menu_button=&show_grading_menu_form($symb,$url);
    my $file_selector=&scantron_uploads($file2grade);
    my $format_selector=&scantron_scantab();
    my $CODE_selector=&scantron_CODElist();
    my $CODE_unique=&scantron_CODEunique();
    my $result;
    #FIXME allow instructor to be able to download the scantron file
    # and to upload it,
    $result.= <<SCANTRONFORM;
    <table width="100%" border="0">
    <tr>
      <td bgcolor="#777777">
       <form method="post" enctype="multipart/form-data" action="/adm/grades" name="scantron_process">
       <input type="hidden" name="command" value="scantron_warning" />
        $default_form_data
        <table width="100%" border="0">
          <tr bgcolor="#e6ffff">
            <td colspan="2">
              &nbsp;<b>Specify file and which Folder/Sequence to grade</b>
            </td>
          </tr>
          <tr bgcolor="#ffffe6">
            <td> Sequence to grade: </td><td> $sequence_selector </td>
          </tr>
          <tr bgcolor="#ffffe6">
            <td> Filename of scoring office file: </td><td> $file_selector </td>
          </tr>
          <tr bgcolor="#ffffe6">
            <td> Format of data file: </td><td> $format_selector </td>
          </tr>
          <tr bgcolor="#ffffe6">
            <td> Saved CODEs to validate against: </td><td> $CODE_selector</td>
          </tr>
          <tr bgcolor="#ffffe6">
            <td> Each CODE is only to be used once:</td><td> $CODE_unique </td>
          </tr>
          <tr bgcolor="#ffffe6">
	    <td> Options: </td>
            <td>
                <input type="checkbox" name="scantron_options_redo" value="redo_skipped"/> Do only previously skipped records <br />
                <input type="checkbox" name="scantron_options_ignore" value="ignore_corrections"/> Remove all exisiting corrections
	    </td>
          </tr>
          <tr bgcolor="#ffffe6">
            <td colspan="2">
              <input type="submit" value="Validate Scantron Records" />
            </td>
          </tr>
        </table>
       </form>
      </td>
    </tr>
SCANTRONFORM
   
    $r->print($result);

    if (&Apache::lonnet::allowed('usc',$ENV{'request.role.domain'}) ||
        &Apache::lonnet::allowed('usc',$ENV{'request.course.id'})) {

        $r->print(<<SCANTRONFORM);
    <tr>
      <td bgcolor="#777777">
        <table width="100%" border="0">
          <tr bgcolor="#e6ffff">
            <td>
              &nbsp;<b>Specify a Scantron data file to upload.</b>
            </td>
          </tr>
          <tr bgcolor="#ffffe6">
            <td>
SCANTRONFORM
    my $default_form_data=&defaultFormData(&get_symb_and_url($r,1));
    my $cdom= $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
    my $cnum= $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
    $r->print(<<UPLOAD);
              <script type="text/javascript" language="javascript">
    function checkUpload(formname) {
	if (formname.upfile.value == "") {
	    alert("Please use the browse button to select a file from your local directory.");
	    return false;
	}
	formname.submit();
    }
              </script>

              <form enctype='multipart/form-data' action='/adm/grades' name='rules' method='post'>
                $default_form_data
                <input name='courseid' type='hidden' value='$cnum' />
                <input name='domainid' type='hidden' value='$cdom' />
                <input name='command' value='scantronupload_save' type='hidden' />
                File to upload:<input type="file" name="upfile" size="50" />
                <br />
                <input type="button" onClick="javascript:checkUpload(this.form);" value="Upload Scantron Data" />
              </form>
UPLOAD

        $r->print(<<SCANTRONFORM);
            </td>
          </tr>
        </table>
      </td>
    </tr>
SCANTRONFORM
    }
    $r->print(<<SCANTRONFORM);
    <tr>
      <td bgcolor="#777777">
        <form action='/adm/grades' name='scantron_download'>
          <input type="hidden" name="command" value="scantron_download" />
          <table width="100%" border="0">
            <tr bgcolor="#e6ffff">
              <td colspan="2">
                &nbsp;<b>Download a scoring office file</b>
              </td>
            </tr>
            <tr bgcolor="#ffffe6">
              <td> Filename of scoring office file: </td><td> $file_selector </td>
            </tr>
            <tr bgcolor="#ffffe6">
              <td colspan="2">
                <input type="submit" value="Show List of Files" />
              </td>
            </tr>
          </table>
        </form>
      </td>
    </tr>
SCANTRONFORM

    $r->print(<<SCANTRONFORM);
  </table>
</form>
$grading_menu_button
SCANTRONFORM

    return
}

sub get_scantron_config {
    my ($which) = @_;
    my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.'/scantronformat.tab');
    my %config;
    #FIXME probably should move to XML it has already gotten a bit much now
    foreach my $line (<$fh>) {
	my ($name,$descrip)=split(/:/,$line);
	if ($name ne $which ) { next; }
	chomp($line);
	my @config=split(/:/,$line);
	$config{'name'}=$config[0];
	$config{'description'}=$config[1];
	$config{'CODElocation'}=$config[2];
	$config{'CODEstart'}=$config[3];
	$config{'CODElength'}=$config[4];
	$config{'IDstart'}=$config[5];
	$config{'IDlength'}=$config[6];
	$config{'Qstart'}=$config[7];
	$config{'Qlength'}=$config[8];
	$config{'Qoff'}=$config[9];
	$config{'Qon'}=$config[10];
	$config{'PaperID'}=$config[11];
	$config{'PaperIDlength'}=$config[12];
	$config{'FirstName'}=$config[13];
	$config{'FirstNamelength'}=$config[14];
	$config{'LastName'}=$config[15];
	$config{'LastNamelength'}=$config[16];
	last;
    }
    return %config;
}

sub username_to_idmap {
    my ($classlist)= @_;
    my %idmap;
    foreach my $student (keys(%$classlist)) {
	$idmap{$classlist->{$student}->[&Apache::loncoursedata::CL_ID]}=
	    $student;
    }
    return %idmap;
}

sub scantron_fixup_scanline {
    my ($scantron_config,$scan_data,$line,$whichline,$field,$args)=@_;
    if ($field eq 'ID') {
	if (length($args->{'newid'}) > $$scantron_config{'IDlength'}) {
	    return ($line,1,'New value too large');
	}
	if (length($args->{'newid'}) < $$scantron_config{'IDlength'}) {
	    $args->{'newid'}=sprintf('%-'.$$scantron_config{'IDlength'}.'s',
				     $args->{'newid'});
	}
	substr($line,$$scantron_config{'IDstart'}-1,
	       $$scantron_config{'IDlength'})=$args->{'newid'};
	if ($args->{'newid'}=~/^\s*$/) {
	    &scan_data($scan_data,"$whichline.user",
		       $args->{'username'}.':'.$args->{'domain'});
	}
    } elsif ($field eq 'CODE') {
	if ($args->{'CODE_ignore_dup'}) {
	    &scan_data($scan_data,"$whichline.CODE_ignore_dup",'1');
	}
	&scan_data($scan_data,"$whichline.useCODE",'1');
	if ($args->{'CODE'} ne 'use_unfound') {
	    if (length($args->{'CODE'}) > $$scantron_config{'CODElength'}) {
		return ($line,1,'New CODE value too large');
	    }
	    if (length($args->{'CODE'}) < $$scantron_config{'CODElength'}) {
		$args->{'CODE'}=sprintf('%-'.$$scantron_config{'CODElength'}.'s',$args->{'CODE'});
	    }
	    substr($line,$$scantron_config{'CODEstart'}-1,
		   $$scantron_config{'CODElength'})=$args->{'CODE'};
	}
    } elsif ($field eq 'answer') {
	my $length=$scantron_config->{'Qlength'};
	my $off=$scantron_config->{'Qoff'};
	my $on=$scantron_config->{'Qon'};
	my $answer=${off}x$length;
	if ($args->{'response'} eq 'none') {
	    &scan_data($scan_data,
		       "$whichline.no_bubble.".$args->{'question'},'1');
	} else {
	    substr($answer,$args->{'response'},1)=$on;
	    &scan_data($scan_data,
		       "$whichline.no_bubble.".$args->{'question'},undef,'1');
	}
	my $where=$length*($args->{'question'}-1)+$scantron_config->{'Qstart'};
	substr($line,$where-1,$length)=$answer;
    }
    return $line;
}

sub scan_data {
    my ($scan_data,$key,$value,$delete)=@_;
    my $filename=$ENV{'form.scantron_selectfile'};
    if (defined($value)) {
	$scan_data->{$filename.'_'.$key} = $value;
    }
    if ($delete) { delete($scan_data->{$filename.'_'.$key}); }
    return $scan_data->{$filename.'_'.$key};
}

sub scantron_parse_scanline {
    my ($line,$whichline,$scantron_config,$scan_data,$justHeader)=@_;
    my %record;
    my $questions=substr($line,$$scantron_config{'Qstart'}-1);
    my $data=substr($line,0,$$scantron_config{'Qstart'}-1);
    if ($$scantron_config{'CODElocation'} ne 0) {
	if ($$scantron_config{'CODElocation'} < 0) {
	    $record{'scantron.CODE'}=substr($data,
					    $$scantron_config{'CODEstart'}-1,
					    $$scantron_config{'CODElength'});
	    if (&scan_data($scan_data,"$whichline.useCODE")) {
		$record{'scantron.useCODE'}=1;
	    }
	    if (&scan_data($scan_data,"$whichline.CODE_ignore_dup")) {
		$record{'scantron.CODE_ignore_dup'}=1;
	    }
	} else {
	    #FIXME interpret first N questions
	}
    }
    $record{'scantron.ID'}=substr($data,$$scantron_config{'IDstart'}-1,
				  $$scantron_config{'IDlength'});
    $record{'scantron.PaperID'}=
	substr($data,$$scantron_config{'PaperID'}-1,
	       $$scantron_config{'PaperIDlength'});
    $record{'scantron.FirstName'}=
	substr($data,$$scantron_config{'FirstName'}-1,
	       $$scantron_config{'FirstNamelength'});
    $record{'scantron.LastName'}=
	substr($data,$$scantron_config{'LastName'}-1,
	       $$scantron_config{'LastNamelength'});
    if ($justHeader) { return \%record; }

    my @alphabet=('A'..'Z');
    my $questnum=0;
    while ($questions) {
	$questnum++;
	my $currentquest=substr($questions,0,$$scantron_config{'Qlength'});
	substr($questions,0,$$scantron_config{'Qlength'})='';
	if (length($currentquest) < $$scantron_config{'Qlength'}) { next; }
	my @array=split($$scantron_config{'Qon'},$currentquest,-1);
	if (length($array[0]) eq $$scantron_config{'Qlength'}) {
	    $record{"scantron.$questnum.answer"}='';
	    if (!&scan_data($scan_data,"$whichline.no_bubble.$questnum")) {
		push(@{$record{"scantron.missingerror"}},$questnum);
 	    }
	} else {
	    $record{"scantron.$questnum.answer"}=$alphabet[length($array[0])];
	}
 	if (scalar(@array) gt 2) {
 	    push(@{$record{'scantron.doubleerror'}},$questnum);
 	    my @ans=@array;
 	    my $i=length($ans[0]);shift(@ans);
	    while ($#ans) {
 		$i+=length($ans[0])+1;
 		$record{"scantron.$questnum.answer"}.=$alphabet[$i];
 		shift(@ans);
 	    }
 	}
    }
    $record{'scantron.maxquest'}=$questnum;
    return \%record;
}

sub scantron_add_delay {
    my ($delayqueue,$scanline,$errormessage,$errorcode)=@_;
    push(@$delayqueue,
	 {'line' => $scanline, 'emsg' => $errormessage,
	  'ecode' => $errorcode }
	 );
}

sub scantron_find_student {
    my ($scantron_record,$scan_data,$idmap,$line)=@_;
    my $scanID=$$scantron_record{'scantron.ID'};
    if ($scanID =~ /^\s*$/) {
 	return &scan_data($scan_data,"$line.user");
    }
    foreach my $id (keys(%$idmap)) {
 	if (lc($id) eq lc($scanID)) {
 	    return $$idmap{$id};
 	}
    }
    return undef;
}

sub scantron_filter {
    my ($curres)=@_;
                        # randomout is dysfunctional at best for this purpose
    if (ref($curres) && $curres->is_problem()) { #&& !$curres->randomout) {
	return 1;
    }
    return 0;
}

sub scantron_process_corrections {
    my ($r) = @_;
    my %scantron_config=&get_scantron_config($ENV{'form.scantron_format'});
    my ($scanlines,$scan_data)=&scantron_getfile();
    my $classlist=&Apache::loncoursedata::get_classlist();
    my $which=$ENV{'form.scantron_line'};
    my $line=&scantron_get_line($scanlines,$scan_data,$which);
    my ($skip,$err,$errmsg);
    if ($ENV{'form.scantron_skip_record'}) {
	$skip=1;
    } elsif ($ENV{'form.scantron_corrections'} =~ /^(duplicate|incorrect)ID$/) {
	my $newstudent=$ENV{'form.scantron_username'}.':'.
	    $ENV{'form.scantron_domain'};
	my $newid=$classlist->{$newstudent}->[&Apache::loncoursedata::CL_ID];
	($line,$err,$errmsg)=
	    &scantron_fixup_scanline(\%scantron_config,$scan_data,$line,$which,
				     'ID',{'newid'=>$newid,
				    'username'=>$ENV{'form.scantron_username'},
				    'domain'=>$ENV{'form.scantron_domain'}});
    } elsif ($ENV{'form.scantron_corrections'} =~ /^(duplicate|incorrect)CODE$/) {
	my $resolution=$ENV{'form.scantron_CODE_resolution'};
	my $newCODE;
	my %args;
	if      ($resolution eq 'use_unfound') {
	    $newCODE='use_unfound';
	} elsif ($resolution eq 'use_found') {
	    $newCODE=$ENV{'form.scantron_CODE_selectedvalue'};
	} elsif ($resolution eq 'use_typed') {
	    $newCODE=$ENV{'form.scantron_CODE_newvalue'};
	} elsif ($resolution =~ /^use_closest_(\d+)/) {
	    $newCODE=$ENV{"form.scantron_CODE_closest_$1"};
	}
	if ($ENV{'form.scantron_corrections'} eq 'duplicateCODE') {
	    $args{'CODE_ignore_dup'}=1;
	}
	$args{'CODE'}=$newCODE;
	($line,$err,$errmsg)=
	    &scantron_fixup_scanline(\%scantron_config,$scan_data,$line,$which,
				     'CODE',\%args);
    } elsif ($ENV{'form.scantron_corrections'} =~ /^(missing|double)bubble$/) {
	foreach my $question (split(',',$ENV{'form.scantron_questions'})) {
	    ($line,$err,$errmsg)=
		&scantron_fixup_scanline(\%scantron_config,$scan_data,$line,
					 $which,'answer',
					 { 'question'=>$question,
		       'response'=>$ENV{"form.scantron_correct_Q_$question"}});
	    if ($err) { last; }
	}
    }
    if ($err) {
	$r->print("Unable to accept last correction, an error occurred :$errmsg:");
    } else {
	&scantron_put_line($scanlines,$scan_data,$which,$line,$skip);
	&scantron_putfile($scanlines,$scan_data);
    }
}

sub reset_skipping_status {
    my ($scanlines,$scan_data)=&scantron_getfile();
    &scan_data($scan_data,'remember_skipping',undef,1);
    &scantron_putfile(undef,$scan_data);
}

sub allow_skipping {
    my ($scan_data,$i)=@_;
    my %remembered=split(':',&scan_data($scan_data,'remember_skipping'));
    delete($remembered{$i});
    &scan_data($scan_data,'remember_skipping',join(':',%remembered));
}

sub should_be_skipped {
    my ($scan_data,$i)=@_;
    if ($ENV{'form.scantron_options_redo'} !~ /^redo_/) {
	# not redoing old skips
	return 0;
    }
    my %remembered=split(':',&scan_data($scan_data,'remember_skipping'));
    if (exists($remembered{$i})) { return 0; }
    return 1;
}

sub remember_current_skipped {
    my ($scanlines,$scan_data)=&scantron_getfile();
    my %to_remember;
    for (my $i=0;$i<=$scanlines->{'count'};$i++) {
	if ($scanlines->{'skipped'}[$i]) {
	    $to_remember{$i}=1;
	}
    }
    &Apache::lonnet::logthis('remembering '.join(':',%to_remember));
    &scan_data($scan_data,'remember_skipping',join(':',%to_remember));
    &scantron_putfile(undef,$scan_data);
}

sub check_for_error {
    my ($r,$result)=@_;
    if ($result ne 'ok' && $result ne 'not_found' ) {
	$r->print("An error occured ($result) when trying to Remove the existing corrections.");
    }
}

sub scantron_warning_screen {
    my ($button_text)=@_;
    my $title=&Apache::lonnet::gettitle($ENV{'form.selectpage'});
    return (<<STUFF);
<p>
<font color="red">Please double check the information
                 below before clicking on '$button_text'</font>
</p>
<table>
<tr><td><b>Sequence To be Graded:</b></td><td>$title</td></tr>
<tr><td><b>Data File that will be used:</b></td><td><tt>$ENV{'form.scantron_selectfile'}</tt></td></tr>
</table>
</font>
<br />
<p> If this information is correct, please click on '$button_text'.</p>
<p> If something is incorrect, please click the 'Grading Menu' button to start over.</p>

<br />
STUFF
}

sub scantron_do_warning {
    my ($r)=@_;
    my ($symb,$url)=&get_symb_and_url($r);
    if (!$symb) {return '';}
    my $default_form_data=&defaultFormData($symb,$url);
    $r->print(&scantron_form_start().$default_form_data);
    my $warning=&scantron_warning_screen('Validate Records');
    $r->print(<<STUFF);
$warning
<input type="submit" name="submit" value="Validate Records" />
<input type="hidden" name="command" value="scantron_validate" />
</form>
STUFF
    $r->print("<br />".&show_grading_menu_form($symb,$url)."</body></html>");
    return '';
}

sub scantron_form_start {
    my ($max_bubble)=@_;
    my $result= <<SCANTRONFORM;
<form method="post" enctype="multipart/form-data" action="/adm/grades" name="scantronupload">
  <input type="hidden" name="selectpage" value="$ENV{'form.selectpage'}" />
  <input type="hidden" name="scantron_format" value="$ENV{'form.scantron_format'}" />
  <input type="hidden" name="scantron_selectfile" value="$ENV{'form.scantron_selectfile'}" />
  <input type="hidden" name="scantron_maxbubble" value="$max_bubble" />
  <input type="hidden" name="scantron_CODElist" value="$ENV{'form.scantron_CODElist'}" />
  <input type="hidden" name="scantron_CODEunique" value="$ENV{'form.scantron_CODEunique'}" />
  <input type="hidden" name="scantron_options_redo" value="$ENV{'form.scantron_options_redo'}" />
  <input type="hidden" name="scantron_options_ignore" value="$ENV{'form.scantron_options_ignore'}" />
SCANTRONFORM
    return $result;
}

sub scantron_validate_file {
    my ($r) = @_;
    my ($symb,$url)=&get_symb_and_url($r);
    if (!$symb) {return '';}
    my $default_form_data=&defaultFormData($symb,$url);
    
    # do the detection of only doing skipped records first befroe we delete
    # them  when doing the corrections reset
    if ($ENV{'form.scantron_options_redo'} ne 'redo_skipped_ready') {
	&reset_skipping_status();
    }
    if ($ENV{'form.scantron_options_redo'} eq 'redo_skipped') {
	&remember_current_skipped();
	&scantron_remove_file('skipped');
	$ENV{'form.scantron_options_redo'}='redo_skipped_ready';
    }

    if ($ENV{'form.scantron_options_ignore'} eq 'ignore_corrections') {
	&check_for_error($r,&scantron_remove_file('corrected'));
	&check_for_error($r,&scantron_remove_file('skipped'));
	&check_for_error($r,&scantron_remove_scan_data());
	$ENV{'form.scantron_options_ignore'}='done';
    }

    if ($ENV{'form.scantron_corrections'}) {
	&scantron_process_corrections($r);
    }
    $r->print("<p>Gathering neccessary info.</p>");$r->rflush();
    #get the student pick code ready
    $r->print(&Apache::loncommon::studentbrowser_javascript());
    my $max_bubble=&scantron_get_maxbubble($r);
    my $result=&scantron_form_start($max_bubble).$default_form_data;
    $r->print($result);
    
    my @validate_phases=( 'ID',
			  'CODE',
			  'doublebubble',
			  'missingbubbles');
    if (!$ENV{'form.validatepass'}) {
	$ENV{'form.validatepass'} = 0;
    }
    my $currentphase=$ENV{'form.validatepass'};

    my $stop=0;
    while (!$stop && $currentphase < scalar(@validate_phases)) {
	$r->print("<p> Validating ".$validate_phases[$currentphase]."</p>");
	$r->rflush();
	my $which="scantron_validate_".$validate_phases[$currentphase];
	{
	    no strict 'refs';
	    ($stop,$currentphase)=&$which($r,$currentphase);
	}
    }
    if (!$stop) {
	my $warning=&scantron_warning_screen('Start Grading');
	$r->print(<<STUFF);
Validation process complete.<br />
$warning
<input type="submit" name="submit" value="Start Grading" />
<input type="hidden" name="command" value="scantron_process" />
STUFF

    } else {
	$r->print('<input type="hidden" name="command" value="scantron_validate" />');
	$r->print("<input type='hidden' name='validatepass' value='".$currentphase."' />");
    }
    if ($stop) {
	$r->print('<input type="submit" name="submit" value="Continue ->" />');
	$r->print(' using corrected info <br />');
	$r->print("<input type='submit' value='Skip' name='scantron_skip_record' />");
	$r->print(" this scanline saving it for later.");
    }
    $r->print(" </form><br />".&show_grading_menu_form($symb,$url).
	      "</body></html>");
    return '';
}

sub scantron_remove_file {
    my ($which)=@_;
    my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
    my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
    my $file='scantron_';
    if ($which eq 'corrected' || $which eq 'skipped') {
	$file.=$which.'_';
    } else {
	return 'refused';
    }
    $file.=$ENV{'form.scantron_selectfile'};
    return &Apache::lonnet::removeuserfile($cname,$cdom,$file);
}

sub scantron_remove_scan_data {
    my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
    my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
    my @keys=&Apache::lonnet::getkeys('nohist_scantrondata',$cdom,$cname);
    my @todelete;
    my $filename=$ENV{'form.scantron_selectfile'};
    foreach my $key (@keys) {
	if ($key=~/^\Q$filename\E_/) {
	    if ($ENV{'form.scantron_options_redo'} eq 'redo_skipped_ready' &&
		$key=~/remember_skipping/) {
		next;
	    }
	    push(@todelete,$key);
	}
    }
    my $result;
    if (@todelete) {
	$result=&Apache::lonnet::del('nohist_scantrondata',\@todelete,$cdom,$cname);
    }
    return $result;
}

sub scantron_getfile {
    #FIXME really would prefer a scantron directory
    my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
    my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
    my $lines;
    $lines=&Apache::lonnet::getfile('/uploaded/'.$cdom.'/'.$cname.'/'.
		       'scantron_orig_'.$ENV{'form.scantron_selectfile'});
    my %scanlines;
    $scanlines{'orig'}=[(split("\n",$lines,-1))];
    my $temp=$scanlines{'orig'};
    $scanlines{'count'}=$#$temp;

    $lines=&Apache::lonnet::getfile('/uploaded/'.$cdom.'/'.$cname.'/'.
		       'scantron_corrected_'.$ENV{'form.scantron_selectfile'});
    if ($lines eq '-1') {
	$scanlines{'corrected'}=[];
    } else {
	$scanlines{'corrected'}=[(split("\n",$lines,-1))];
    }
    $lines=&Apache::lonnet::getfile('/uploaded/'.$cdom.'/'.$cname.'/'.
		       'scantron_skipped_'.$ENV{'form.scantron_selectfile'});
    if ($lines eq '-1') {
	$scanlines{'skipped'}=[];
    } else {
	$scanlines{'skipped'}=[(split("\n",$lines,-1))];
    }
    my @tmp=&Apache::lonnet::dump('nohist_scantrondata',$cdom,$cname);
    if ($tmp[0] =~ /^(error:|no_such_host)/) { @tmp=(); }
    my %scan_data = @tmp;
    return (\%scanlines,\%scan_data);
}

sub lonnet_putfile {
    my ($contents,$filename)=@_;
    my $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
    my $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
    my $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
    $ENV{'form.sillywaytopassafilearound'}=$contents;
    &Apache::lonnet::finishuserfileupload($docuname,$docudom,$docuhome,'sillywaytopassafilearound',$filename);

}

sub scantron_putfile {
    my ($scanlines,$scan_data) = @_;
    #FIXME really would prefer a scantron directory
    my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
    my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
    if ($scanlines) {
	my $prefix='scantron_';
# no need to update orig, shouldn't change
#   &lonnet_putfile(join("\n",@{$scanlines->{'orig'}}),$prefix.'orig_'.
#		    $ENV{'form.scantron_selectfile'});
	&lonnet_putfile(join("\n",@{$scanlines->{'corrected'}}),
			$prefix.'corrected_'.
			$ENV{'form.scantron_selectfile'});
	&lonnet_putfile(join("\n",@{$scanlines->{'skipped'}}),
			$prefix.'skipped_'.
			$ENV{'form.scantron_selectfile'});
    }
    &Apache::lonnet::put('nohist_scantrondata',$scan_data,$cdom,$cname);
}

sub scantron_get_line {
    my ($scanlines,$scan_data,$i)=@_;
    if (&should_be_skipped($scan_data,$i)) { return undef; }
    if ($scanlines->{'skipped'}[$i]) { return undef; }
    if ($scanlines->{'corrected'}[$i]) {return $scanlines->{'corrected'}[$i];}
    return $scanlines->{'orig'}[$i]; 
}

sub get_todo_count {
    my ($scanlines,$scan_data)=@_;
    my $count=0;
    for (my $i=0;$i<=$scanlines->{'count'};$i++) {
	my $line=&scantron_get_line($scanlines,$scan_data,$i);
	if ($line=~/^[\s\cz]*$/) { next; }
	$count++;
    }
    return $count;
}

sub scantron_put_line {
    my ($scanlines,$scan_data,$i,$newline,$skip)=@_;
    if ($skip) {
	$scanlines->{'skipped'}[$i]=$newline;
	&allow_skipping($scan_data,$i);
	return;
    }
    $scanlines->{'corrected'}[$i]=$newline;
}

sub scantron_validate_ID {
    my ($r,$currentphase) = @_;
    
    #get student info
    my $classlist=&Apache::loncoursedata::get_classlist();
    my %idmap=&username_to_idmap($classlist);

    #get scantron line setup
    my %scantron_config=&get_scantron_config($ENV{'form.scantron_format'});
    my ($scanlines,$scan_data)=&scantron_getfile();

    my %found=('ids'=>{},'usernames'=>{});
    for (my $i=0;$i<=$scanlines->{'count'};$i++) {
	my $line=&scantron_get_line($scanlines,$scan_data,$i);
	if ($line=~/^[\s\cz]*$/) { next; }
	my $scan_record=&scantron_parse_scanline($line,$i,\%scantron_config,
						 $scan_data);
	my $id=$$scan_record{'scantron.ID'};
	my $found;
	foreach my $checkid (keys(%idmap)) {
	    if (lc($checkid) eq lc($id)) { $found=$checkid;last; }
	}
	if ($found) {
	    my $username=$idmap{$found};
	    if ($found{'ids'}{$found}) {
		&scantron_get_correction($r,$i,$scan_record,\%scantron_config,
					 $line,'duplicateID',$found);
		return(1,$currentphase);
	    } elsif ($found{'usernames'}{$username}) {
		&scantron_get_correction($r,$i,$scan_record,\%scantron_config,
					 $line,'duplicateID',$username);
		return(1,$currentphase);
	    }
	    #FIXME store away line we previously saw the ID on to use above
	    $found{'ids'}{$found}++;
	    $found{'usernames'}{$username}++;
	} else {
	    if ($id =~ /^\s*$/) {
		my $username=&scan_data($scan_data,"$i.user");
		if (defined($username) && $found{'usernames'}{$username}) {
		    &scantron_get_correction($r,$i,$scan_record,
					     \%scantron_config,
					     $line,'duplicateID',$username);
		    return(1,$currentphase);
		} elsif (!defined($username)) {
		    &scantron_get_correction($r,$i,$scan_record,
					     \%scantron_config,
					     $line,'incorrectID');
		    return(1,$currentphase);
		}
		$found{'usernames'}{$username}++;
	    } else {
		&scantron_get_correction($r,$i,$scan_record,\%scantron_config,
					 $line,'incorrectID');
		return(1,$currentphase);
	    }
	}
    }

    return (0,$currentphase+1);
}

sub scantron_get_correction {
    my ($r,$i,$scan_record,$scan_config,$line,$error,$arg)=@_;

#FIXME in the case of a duplicated ID the previous line, probaly need
#to show both the current line and the previous one and allow skipping
#the previous one or the current one

    $r->print("<p><b>An error was detected ($error)</b>");
    if ( defined($$scan_record{'scantron.PaperID'}) ) {
	$r->print(" for PaperID <tt>".
		  $$scan_record{'scantron.PaperID'}."</tt> \n");
    } else {
	$r->print(" in scanline $i <pre>".
		  $line."</pre> \n");
    }
    $r->print('<input type="hidden" name="scantron_corrections" value="'.$error.'" />'."\n");
    $r->print('<input type="hidden" name="scantron_line" value="'.$i.'" />'."\n");
    if ($error =~ /ID$/) {
	if ($error eq 'incorrectID') {
	    $r->print("The encoded ID is not in the classlist</p>\n");
	} elsif ($error eq 'duplicateID') {
	    $r->print("The encoded ID has also been used by a previous paper $arg</p>\n");
	}
	$r->print("<p>The ID on the form is  <tt>".
		  $$scan_record{'scantron.ID'}."</tt><br />\n");
	$r->print("The name on the paper is ".
		  $$scan_record{'scantron.LastName'}.",".
		  $$scan_record{'scantron.FirstName'}."</p>");
	$r->print("<p>How should I handle this? <br /> \n");
	$r->print("\n<ul><li> ");
	#FIXME it would be nice if this sent back the user ID and
	#could do partial userID matches
	$r->print(&Apache::loncommon::selectstudent_link('scantronupload',
				       'scantron_username','scantron_domain'));
	$r->print(": <input type='text' name='scantron_username' value='' />");
	$r->print("\n@".
		 &Apache::loncommon::select_dom_form($ENV{'request.role.domain'},'scantron_domain'));

	$r->print('</li>');
    } elsif ($error =~ /CODE$/) {
	if ($error eq 'incorrectCODE') {
	    $r->print("</p><p>The encoded CODE is not in the list of possible CODEs</p>\n");
	} elsif ($error eq 'duplicateCODE') {
	    $r->print("</p><p>The encoded CODE has also been used by a previous paper ".join(', ',@{$arg}).", and CODEs are supposed to be unique</p>\n");
	}
	$r->print("<p>The CODE on the form is  <tt>".
		  $$scan_record{'scantron.CODE'}."</tt><br />\n");
	$r->print("<p>The ID on the form is  <tt>".
		  $$scan_record{'scantron.ID'}."</tt><br />\n");
	$r->print("The name on the paper is ".
		  $$scan_record{'scantron.LastName'}.",".
		  $$scan_record{'scantron.FirstName'}."</p>");
	$r->print("<p>How should I handle this? <br /> \n");
	$r->print("\n<br /> ");
	my $i=0;
	if ($error eq 'incorrectCODE') {
	    my ($max,$closest)=&scantron_get_closely_matching_CODEs($arg,$$scan_record{'scantron.CODE'});
	    foreach my $testcode (@{$closest}) {
		my $checked='';
		if (!$i) { $checked=' checked="on" '; }
		$r->print("<input type='radio' name='scantron_CODE_resolution' value='use_closest_$i' $checked /> Use the similar CODE <b><tt>".$testcode."</tt></b> instead.<input type='hidden' name='scantron_CODE_closest_$i' value='$testcode' />");
		$r->print("\n<br />");
		$i++;
	    }
	}
	my $checked; if (!$i) { $checked=' checked="on" '; }
	$r->print("<input type='radio' name='scantron_CODE_resolution' value='use_unfound' $checked /> Use the CODE <b><tt>".$$scan_record{'scantron.CODE'}."</tt></b> that is was on the paper, ignoring the error.");
	$r->print("\n<br />");

	$r->print(<<ENDSCRIPT);
<script type="text/javascript">
function change_radio(field) {
    var slct=document.scantronupload.scantron_CODE_resolution;
    var i;
    for (i=0;i<slct.length;i++) {
        if (slct[i].value==field) { slct[i].checked=true; }
    }
}
</script>
ENDSCRIPT
	my $href="/adm/pickcode?".
	   "form=".&Apache::lonnet::escape("scantronupload").
	   "&scantron_format=".&Apache::lonnet::escape($ENV{'form.scantron_format'}).
	   "&scantron_CODElist=".&Apache::lonnet::escape($ENV{'form.scantron_CODElist'}).
	   "&curCODE=".&Apache::lonnet::escape($$scan_record{'scantron.CODE'}).
	   "&scantron_selectfile=".&Apache::lonnet::escape($ENV{'form.scantron_selectfile'});
	$r->print("<input type='radio' name='scantron_CODE_resolution' value='use_found' /> <a target='_blank' href='$href'>Select</a> a CODE from the list of all CODEs and use it. Selected CODE is <input readonly='true' type='text' size='8' name='scantron_CODE_selectedvalue' onfocus=\"javascript:change_radio('use_found')\" onchange=\"javascript:change_radio('use_found')\" />");
	$r->print("\n<br />");
	$r->print("<input type='radio' name='scantron_CODE_resolution' value='use_typed' /> Use <input type='text' size='8' name='scantron_CODE_newvalue' onfocus=\"javascript:change_radio('use_typed')\" onkeypress=\"javascript:change_radio('use_typed')\" /> as the CODE.");
	$r->print("\n<br /><br />");
    } elsif ($error eq 'doublebubble') {
	$r->print("<p>There have been multiple bubbles scanned for a some question(s)</p>\n");
	$r->print('<input type="hidden" name="scantron_questions" value="'.
		  join(',',@{$arg}).'" />');
	$r->print("<p>Please indicate which bubble should be used for grading</p>");
	foreach my $question (@{$arg}) {
	    my $selected=$$scan_record{"scantron.$question.answer"};
	    &scantron_bubble_selector($r,$scan_config,$question,split('',$selected));
	}
    } elsif ($error eq 'missingbubble') {
	$r->print("<p>There have been <b>no</b> bubbles scanned for some question(s)</p>\n");
	$r->print("<p>Please indicate which bubble should be used for grading</p>");
	$r->print("Some questions have no scanned bubbles\n");
	$r->print('<input type="hidden" name="scantron_questions" value="'.
		  join(',',@{$arg}).'" />');
	foreach my $question (@{$arg}) {
	    my $selected=$$scan_record{"scantron.$question.answer"};
	    &scantron_bubble_selector($r,$scan_config,$question);
	}
    } else {
	$r->print("\n<ul>");
    }
    $r->print("\n</li></ul>");

}

sub scantron_bubble_selector {
    my ($r,$scan_config,$quest,@selected)=@_;
    my $max=$$scan_config{'Qlength'};
    my @alphabet=('A'..'Z');
    $r->print("<table border='1'><tr><td rowspan='2'>$quest</td>");
    for (my $i=0;$i<$max+1;$i++) {
	$r->print('<td align="center">');
	if ($selected[0] eq $alphabet[$i]) { $r->print('X'); shift(@selected) }
	else { $r->print('&nbsp;'); }
	$r->print('</td>');
    }
    $r->print('<td></td></tr><tr>');
    for (my $i=0;$i<$max;$i++) {
	$r->print('<td><input type="radio" name="scantron_correct_Q_'.$quest.
		  '" value="'.$i.'" />'.$alphabet[$i]."</td>");
    }
    $r->print('<td><input type="radio" name="scantron_correct_Q_'.$quest.
	      '" value="none" /> No bubble </td>');
    $r->print('</tr></table>');
}

sub num_matches {
    my ($orig,$code) = @_;
    my @code=split(//,$code);
    my @orig=split(//,$orig);
    my $same=0;
    for (my $i=0;$i<scalar(@code);$i++) {
	if ($code[$i] eq $orig[$i]) { $same++; }
    }
    return $same;
}

sub scantron_get_closely_matching_CODEs {
    my ($allcodes,$CODE)=@_;
    my @CODEs;
    foreach my $testcode (sort(keys(%{$allcodes}))) {
	push(@{$CODEs[&num_matches($CODE,$testcode)]},$testcode);
    }

    return ($#CODEs,$CODEs[-1]);
}

sub get_codes {
    my $old_name=$ENV{'form.scantron_CODElist'};
    my $cdom =$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
    my $cnum =$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
    my %result=&Apache::lonnet::get('CODEs',[$old_name],$cdom,$cnum);
    my %allcodes=map {(&Apache::lonprintout::num_to_letters($_),1)} split(',',$result{$old_name});
    return %allcodes;
}

sub scantron_validate_CODE {
    my ($r,$currentphase) = @_;
    my %scantron_config=&get_scantron_config($ENV{'form.scantron_format'});
    if ($scantron_config{'CODElocation'} &&
	$scantron_config{'CODEstart'} &&
	$scantron_config{'CODElength'}) {
	if (!defined($ENV{'form.scantron_CODElist'})) {
	    &FIXME_blow_up()
	}
    } else {
	return (0,$currentphase+1);
    }
    
    my %usedCODEs;

    my %allcodes=&get_codes();

    my ($scanlines,$scan_data)=&scantron_getfile();
    for (my $i=0;$i<=$scanlines->{'count'};$i++) {
	my $line=&scantron_get_line($scanlines,$scan_data,$i);
	if ($line=~/^[\s\cz]*$/) { next; }
	my $scan_record=&scantron_parse_scanline($line,$i,\%scantron_config,
						 $scan_data);
	my $CODE=$$scan_record{'scantron.CODE'};
	my $error=0;
	if (!exists($allcodes{$CODE}) && !$$scan_record{'scantron.useCODE'}) {
	    &scantron_get_correction($r,$i,$scan_record,
				     \%scantron_config,
				     $line,'incorrectCODE',\%allcodes);
	    return(1,$currentphase);
	}
	if (exists($usedCODEs{$CODE}) 
	    && $ENV{'form.scantron_CODEunique'} eq 'yes'
	    && !$$scan_record{'scantron.CODE_ignore_dup'}) {
	    &scantron_get_correction($r,$i,$scan_record,
				     \%scantron_config,
				     $line,'duplicateCODE',$usedCODEs{$CODE});
	    return(1,$currentphase);
	}
	push (@{$usedCODEs{$CODE}},$$scan_record{'scantron.PaperID'});
    }
    return (0,$currentphase+1);
}

sub scantron_validate_doublebubble {
    my ($r,$currentphase) = @_;
    #get student info
    my $classlist=&Apache::loncoursedata::get_classlist();
    my %idmap=&username_to_idmap($classlist);

    #get scantron line setup
    my %scantron_config=&get_scantron_config($ENV{'form.scantron_format'});
    my ($scanlines,$scan_data)=&scantron_getfile();
    for (my $i=0;$i<=$scanlines->{'count'};$i++) {
	my $line=&scantron_get_line($scanlines,$scan_data,$i);
	if ($line=~/^[\s\cz]*$/) { next; }
	my $scan_record=&scantron_parse_scanline($line,$i,\%scantron_config,
						 $scan_data);
	if (!defined($$scan_record{'scantron.doubleerror'})) { next; }
	&scantron_get_correction($r,$i,$scan_record,\%scantron_config,$line,
				 'doublebubble',
				 $$scan_record{'scantron.doubleerror'});
    	return (1,$currentphase);
    }
    return (0,$currentphase+1);
}

sub scantron_get_maxbubble {
    my ($r)=@_;
    if (defined($ENV{'form.scantron_maxbubble'}) &&
	$ENV{'form.scantron_maxbubble'}) {
	return $ENV{'form.scantron_maxbubble'};
    }
    my $navmap=Apache::lonnavmaps::navmap->new();
    my (undef,undef,$sequence)=
	&Apache::lonnet::decode_symb($ENV{'form.selectpage'});
    my $map=$navmap->getResourceByUrl($sequence);
    my @resources=$navmap->retrieveResources($map,\&scantron_filter,1,0);
    &Apache::lonnet::delenv('form.counter');
    foreach my $resource (@resources) {
	my $result=&Apache::lonnet::ssi($resource->src());
    }
    &Apache::lonnet::delenv('scantron\.');
    my $envfile=$ENV{'user.environment'};
    $envfile=~/\/([^\/]+)\.id$/;
    $envfile=$1;
    &Apache::lonnet::transfer_profile_to_env($r->dir_config('lonIDsDir'),
					     $envfile);
    $ENV{'form.scantron_maxbubble'}=$ENV{'form.counter'}-1;
    return $ENV{'form.scantron_maxbubble'};
}

sub scantron_validate_missingbubbles {
    my ($r,$currentphase) = @_;
    #get student info
    my $classlist=&Apache::loncoursedata::get_classlist();
    my %idmap=&username_to_idmap($classlist);

    #get scantron line setup
    my %scantron_config=&get_scantron_config($ENV{'form.scantron_format'});
    my ($scanlines,$scan_data)=&scantron_getfile();
    my $max_bubble=&scantron_get_maxbubble();
    if (!$max_bubble) { $max_bubble=2**31; }
    for (my $i=0;$i<=$scanlines->{'count'};$i++) {
	my $line=&scantron_get_line($scanlines,$scan_data,$i);
	if ($line=~/^[\s\cz]*$/) { next; }
	my $scan_record=&scantron_parse_scanline($line,$i,\%scantron_config,
						 $scan_data);
	if (!defined($$scan_record{'scantron.missingerror'})) { next; }
	my @to_correct;
	foreach my $missing (@{$$scan_record{'scantron.missingerror'}}) {
	    if ($missing > $max_bubble) { next; }
	    push(@to_correct,$missing);
	}
	if (@to_correct) {
	    &scantron_get_correction($r,$i,$scan_record,\%scantron_config,
				     $line,'missingbubble',\@to_correct);
	    return (1,$currentphase);
	}

    }
    return (0,$currentphase+1);
}

sub scantron_process_students {
    my ($r) = @_;
    my (undef,undef,$sequence)=&Apache::lonnet::decode_symb($ENV{'form.selectpage'});
    my ($symb,$url)=&get_symb_and_url($r);
    if (!$symb) {return '';}
    my $default_form_data=&defaultFormData($symb,$url);

    my %scantron_config=&get_scantron_config($ENV{'form.scantron_format'});
    my ($scanlines,$scan_data)=&scantron_getfile();
    my $classlist=&Apache::loncoursedata::get_classlist();
    my %idmap=&username_to_idmap($classlist);
    my $navmap=Apache::lonnavmaps::navmap->new();
    my $map=$navmap->getResourceByUrl($sequence);
    my @resources=$navmap->retrieveResources($map,\&scantron_filter,1,0);
#    $r->print("geto ".scalar(@resources)."<br />");
    my $result= <<SCANTRONFORM;
<form method="post" enctype="multipart/form-data" action="/adm/grades" name="scantronupload">
  <input type="hidden" name="command" value="scantron_configphase" />
  $default_form_data
SCANTRONFORM
    $r->print($result);

    my @delayqueue;
    my %completedstudents;
    
    my $count=&get_todo_count($scanlines,$scan_data);
    my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,'Scantron Status',
 				    'Scantron Progress',$count,
				    'inline',undef,'scantronupload');
    &Apache::lonhtmlcommon::Update_PrgWin($r,\%prog_state,
					  'Processing first student');
    my $start=&Time::HiRes::time();
    my $i=-1;
    my ($uname,$udom,$started);
    while ($i<$scanlines->{'count'}) {
 	($uname,$udom)=('','');
 	$i++;
 	my $line=&scantron_get_line($scanlines,$scan_data,$i);
 	if ($line=~/^[\s\cz]*$/) { next; }
	if ($started) {
	    &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
						     'last student');
	}
	$started=1;
 	my $scan_record=&scantron_parse_scanline($line,$i,\%scantron_config,
 						 $scan_data);
 	unless ($uname=&scantron_find_student($scan_record,$scan_data,
 					      \%idmap,$i)) {
  	    &scantron_add_delay(\@delayqueue,$line,
 				'Unable to find a student that matches',1);
 	    next;
  	}
 	if (exists $completedstudents{$uname}) {
 	    &scantron_add_delay(\@delayqueue,$line,
 				'Student '.$uname.' has multiple sheets',2);
 	    next;
 	}
  	($uname,$udom)=split(/:/,$uname);
  	&Apache::lonnet::delenv('form.counter');
  	&Apache::lonnet::appenv(%$scan_record);
	
	my $i=0;
	foreach my $resource (@resources) {
	    $i++;
	    my %form=('submitted'     =>'scantron',
		      'grade_target'  =>'grade',
		      'grade_username'=>$uname,
		      'grade_domain'  =>$udom,
		      'grade_courseid'=>$ENV{'request.course.id'},
		      'grade_symb'    =>$resource->symb());
	    if (exists($scan_record->{'scantron.CODE'}) &&
		$scan_record->{'scantron.CODE'}) {
		$form{'CODE'}=$scan_record->{'scantron.CODE'};
	    }
	    my $result=&Apache::lonnet::ssi($resource->src(),%form);
	    if (&Apache::loncommon::connection_aborted($r)) { last; }
	}
	$completedstudents{$uname}={'line'=>$line};
	if (&Apache::loncommon::connection_aborted($r)) { last; }
    } continue {
	&Apache::lonnet::delenv('form.counter');
	&Apache::lonnet::delenv('scantron\.');
    }
    &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
#    my $lasttime = &Time::HiRes::time()-$start;
#    $r->print("<p>took $lasttime</p>");

    $navmap->untieHashes();
    $r->print("</form>");
    $r->print(&show_grading_menu_form($symb,$url));
    return '';
}

sub scantron_upload_scantron_data {
    my ($r)=@_;
    $r->print(&Apache::loncommon::coursebrowser_javascript($ENV{'request.role.domain'}));
    my $select_link=&Apache::loncommon::selectcourse_link('rules','courseid',
							  'domainid',
							  'coursename');
    my $domsel=&Apache::loncommon::select_dom_form($ENV{'request.role.domain'},
						   'domainid');
    my $default_form_data=&defaultFormData(&get_symb_and_url($r,1));
    $r->print(<<UPLOAD);
<script type="text/javascript" language="javascript">
    function checkUpload(formname) {
	if (formname.upfile.value == "") {
	    alert("Please use the browse button to select a file from your local directory.");
	    return false;
	}
	formname.submit();
    }
</script>

<form enctype='multipart/form-data' action='/adm/grades' name='rules' method='post'>
$default_form_data
<table>
<tr><td>$select_link </td></tr>
<tr><td>Course ID:   </td><td><input name='courseid' type='text' />  </td></tr>
<tr><td>Course Name: </td><td><input name='coursename' type='text' /></td></tr>
<tr><td>Domain:      </td><td>$domsel                                </td></tr>
<tr><td>File to upload:</td><td><input type="file" name="upfile" size="50" /></td></tr>
</table>
<input name='command' value='scantronupload_save' type='hidden' />
<input type="button" onClick="javascript:checkUpload(this.form);" value="Upload Scantron Data" />
</form>
UPLOAD
    return '';
}

sub scantron_upload_scantron_data_save {
    my($r)=@_;
    my ($symb,$url)=&get_symb_and_url($r,1);
    my $doanotherupload=
	'<br /><form action="/adm/grades" method="post">'."\n".
	'<input type="hidden" name="command" value="scantronupload" />'."\n".
	'<input type="submit" name="submit" value="Do Another Upload" />'."\n".
	'</form>'."\n";
    if (!&Apache::lonnet::allowed('usc',$ENV{'form.domainid'}) &&
	!&Apache::lonnet::allowed('usc',
			    $ENV{'form.domainid'}.'_'.$ENV{'form.courseid'})) {
	$r->print("You are not allowed to upload Scantron data to the requested course.<br />");
	if ($symb) {
	    $r->print(&show_grading_menu_form($symb,$url));
	} else {
	    $r->print($doanotherupload);
	}
	return '';
    }
    my %coursedata=&Apache::lonnet::coursedescription($ENV{'form.domainid'}.'_'.$ENV{'form.courseid'});
    $r->print("Doing upload to ".$coursedata{'description'}." <br />");
    my $home=&Apache::lonnet::homeserver($ENV{'form.courseid'},
					 $ENV{'form.domainid'});
    my $fname=$ENV{'form.upfile.filename'};
    #FIXME
    #copied from lonnet::userfileupload()
    #make that function able to target a specified course
    # Replace Windows backslashes by forward slashes
    $fname=~s/\\/\//g;
    # Get rid of everything but the actual filename
    $fname=~s/^.*\/([^\/]+)$/$1/;
    # Replace spaces by underscores
    $fname=~s/\s+/\_/g;
    # Replace all other weird characters by nothing
    $fname=~s/[^\w\.\-]//g;
    # See if there is anything left
    unless ($fname) { return 'error: no uploaded file'; }
    my $uploadedfile=$fname;
    $fname='scantron_orig_'.$fname;
    if (length($ENV{'form.upfile'}) < 2) {
	$r->print("<font color='red'>Error:</font> The file you attempted to upload, <tt>".&HTML::Entities::encode($ENV{'form.upfile.filename'},'<>&"')."</tt>, contained no information. Please check that you entered the correct filename.");
    } else {
	my $result=&Apache::lonnet::finishuserfileupload($ENV{'form.courseid'},$ENV{'form.domainid'},$home,'upfile',$fname);
	if ($result =~ m|^/uploaded/|) {
	    $r->print("<font color='green'>Success:</font> Successfully uploaded ".(length($ENV{'form.upfile'})-1)." bytes of data into location <tt>".$result."</tt>");
	} else {
	    $r->print("<font color='red'>Error:</font> An error (".$result.") occurred when attempting to upload the file, <tt>".&HTML::Entities::encode($ENV{'form.upfile.filename'},'<>&"')."</tt>");
	}
    }
    if ($symb) {
	$r->print(&scantron_selectphase($r,$uploadedfile));
    } else {
	$r->print($doanotherupload);
    }
    return '';
}

sub valid_file {
    my ($requested_file)=@_;
    foreach my $filename (sort(&scantron_filenames())) {
	&Apache::lonnet::logthis("$requested_file  $filename");
	if ($requested_file eq $filename) { return 1; }
    }
    return 0;
}

sub scantron_download_scantron_data {
    my ($r)=@_;
    my $default_form_data=&defaultFormData(&get_symb_and_url($r,1));
    my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
    my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
    my $file=$ENV{'form.scantron_selectfile'};
    if (! &valid_file($file)) {
	$r->print(<<ERROR);
	<p>
	    The requested file name was invalid.
        </p>
ERROR
	$r->print(&show_grading_menu_form(&get_symb_and_url($r,1)));
	return;
    }
    my $orig='/uploaded/'.$cdom.'/'.$cname.'/scantron_orig_'.$file;
    my $corrected='/uploaded/'.$cdom.'/'.$cname.'/scantron_corrected_'.$file;
    my $skipped='/uploaded/'.$cdom.'/'.$cname.'/scantron_skipped_'.$file;
    &Apache::lonnet::allowuploaded('/adm/grades',$orig);
    &Apache::lonnet::allowuploaded('/adm/grades',$corrected);
    &Apache::lonnet::allowuploaded('/adm/grades',$skipped);
    $r->print(<<DOWNLOAD);
    <p>
	<a href="$orig">Original</a> file as uploaded by the scantron office.
    </p>
    <p>
	<a href="$corrected">Corrections</a>, a file of corrected records that were used in grading.
    </p>
    <p>
	<a href="$skipped">Skipped</a>, a file of records that were skipped.
    </p>
DOWNLOAD
    $r->print(&show_grading_menu_form(&get_symb_and_url($r,1)));
    return '';
}

#-------- end of section for handling grading scantron forms -------
#
#-------------------------------------------------------------------


#-------------------------- Menu interface -------------------------
#
#--- Show a Grading Menu button - Calls the next routine ---
sub show_grading_menu_form {
    my ($symb,$url)=@_;
    my $result.='<br /><form action="/adm/grades" method="post">'."\n".
	'<input type="hidden" name="symb" value="'.$symb.'" />'."\n".
	'<input type="hidden" name="url" value="'.$url.'" />'."\n".
	'<input type="hidden" name="saveState"  value="'.$ENV{'form.saveState'}.'" />'."\n".
	'<input type="hidden" name="command" value="gradingmenu" />'."\n".
	'<input type="submit" name="submit" value="Grading Menu" />'."\n".
	'</form>'."\n";
    return $result;
}

# -- Retrieve choices for grading form
sub savedState {
    my %savedState = ();
    if ($ENV{'form.saveState'}) {
	foreach (split(/:/,$ENV{'form.saveState'})) {
	    my ($key,$value) = split(/=/,$_,2);
	    $savedState{$key} = $value;
	}
    }
    return \%savedState;
}

#--- Displays the main menu page -------
sub gradingmenu {
    my ($request) = @_;
    my ($symb,$url)=&get_symb_and_url($request);
    if (!$symb) {return '';}
    my $probTitle = &Apache::lonnet::gettitle($symb);

    $request->print(<<GRADINGMENUJS);
<script type="text/javascript" language="javascript">
    function checkChoice(formname,val,cmdx) {
	if (val <= 2) {
	    var cmd = radioSelection(formname.radioChoice);
	    var cmdsave = cmd;
	} else {
	    cmd = cmdx;
	    cmdsave = 'submission';
	}
	formname.command.value = cmd;
	formname.saveState.value = "saveCmd="+cmdsave+":saveSec="+pullDownSelection(formname.section)+
	    ":saveSub="+pullDownSelection(formname.submitonly)+":saveStatus="+pullDownSelection(formname.Status);
	if (val < 5) formname.submit();
	if (val == 5) {
	    if (!checkReceiptNo(formname,'notOK')) { return false;}
	    formname.submit();
	}
    }

    function checkReceiptNo(formname,nospace) {
	var receiptNo = formname.receipt.value;
	var checkOpt = false;
	if (nospace == "OK" && isNaN(receiptNo)) {checkOpt = true;}
	if (nospace == "notOK" && (isNaN(receiptNo) || receiptNo == "")) {checkOpt = true;}
	if (checkOpt) {
	    alert("Please enter a receipt number given by a student in the receipt box.");
	    formname.receipt.value = "";
	    formname.receipt.focus();
	    return false;
	}
	return true;
    }
</script>
GRADINGMENUJS
    &commonJSfunctions($request);
    my $result='<h3>&nbsp;<font color="#339933">Manual Grading/View Submission</font></h3>';
    my ($table,undef,$hdgrade) = &showResourceInfo($url,$probTitle);
    $result.=$table;
    my (undef,$sections) = &getclasslist('all','0');
    my $savedState = &savedState();
    my $saveCmd = ($$savedState{'saveCmd'} eq '' ? 'submission' : $$savedState{'saveCmd'});
    my $saveSec = ($$savedState{'saveSec'} eq '' ? 'all' : $$savedState{'saveSec'});
    my $saveSub = ($$savedState{'saveSub'} eq '' ? 'all' : $$savedState{'saveSub'});
    my $saveStatus = ($$savedState{'saveStatus'} eq '' ? 'Active' : $$savedState{'saveStatus'});

    $result.='<form action="/adm/grades" method="post" name="gradingMenu">'."\n".
	'<input type="hidden" name="symb"        value="'.$symb.'" />'."\n".
	'<input type="hidden" name="url"         value="'.$url.'" />'."\n".
	'<input type="hidden" name="handgrade"   value="'.$hdgrade.'" />'."\n".
	'<input type="hidden" name="probTitle"   value="'.$probTitle.'" />'."\n".
	'<input type="hidden" name="command"     value="" />'."\n".
	'<input type="hidden" name="saveState"   value="" />'."\n".
	'<input type="hidden" name="gradingMenu" value="1" />'."\n".
	'<input type="hidden" name="showgrading" value="yes" />'."\n";

    $result.='<table width="100%" border=0><tr><td bgcolor=#777777>'."\n".
	'<table width=100% border=0><tr bgcolor="#e6ffff"><td colspan="2">'."\n".
	'&nbsp;<b>Select a Grading/Viewing Option</b></td></tr>'."\n".
	'<tr bgcolor="#ffffe6" valign="top"><td>'."\n";

    $result.='<table width="100%" border=0>';
    $result.='<tr bgcolor="#ffffe6" valign="top"><td>'."\n".
	'&nbsp;'.&mt('Select Section').': <select name="section">'."\n";
    if (ref($sections)) {
	foreach (sort (@$sections)) {
	    $result.='<option value="'.$_.'" '.
		($saveSec eq $_ ? 'selected="on"':'').'>'.$_.'</option>'."\n";
	}
    }
    $result.= '<option value="all" '.($saveSec eq 'all' ? 'selected="on"' : ''). '>all</select> &nbsp; ';

    $result.=&mt('Student Status').':</b>'.&Apache::lonhtmlcommon::StatusOptions($saveStatus,undef,1,undef);

    $result.='</td></tr>';

    $result.='<tr bgcolor="#ffffe6"valign="top"><td>'.
	'<input type="radio" name="radioChoice" value="submission" '.
	($saveCmd eq 'submission' ? 'checked' : '').'> '.'<b>'.&mt('Current Resource').':</b> '.&mt('For one or more students').
	' <select name="submitonly">'.
	'<option value="yes" '.
	($saveSub eq 'yes' ? 'selected="on"' : '').'>with submissions</option>'.
	'<option value="graded" '.
	($saveSub eq 'graded' ? 'selected="on"' : '').'>with ungraded submissions</option>'.
	'<option value="incorrect" '.
	($saveSub eq 'incorrect' ? 'selected="on"' : '').'>with incorrect submissions</option>'.
	'<option value="all" '.
	($saveSub eq 'all' ? 'selected="on"' : '').'>with any status</option></select></td></tr>'."\n";

    $result.='<tr bgcolor="#ffffe6"valign="top"><td>'.
	'<input type="radio" name="radioChoice" value="viewgrades" '.
	($saveCmd eq 'viewgrades' ? 'checked' : '').'> '.
	'<b>Current Resource:</b> For all students in selected section or course</td></tr>'."\n";

    $result.='<tr bgcolor="#ffffe6" valign="top"><td>'.
	'<input type="radio" name="radioChoice" value="pickStudentPage" '.
	($saveCmd eq 'pickStudentPage' ? 'checked' : '').'> '.
	'The <b>complete</b> set/page/sequence: For one student</td></tr>'."\n";

    $result.='<tr bgcolor="#ffffe6"><td><br />'.
	'<input type="button" onClick="javascript:checkChoice(this.form,\'2\');" value="Next->" />'.
	'</td></tr></table>'."\n";

    $result.='</td><td valign="top">';

    $result.='<table width="100%" border=0>';
    $result.='<tr bgcolor="#ffffe6"><td>'.
	'<input type="button" onClick="javascript:checkChoice(this.form,\'3\',\'csvform\');" value="'.&mt('Upload').'" />'.
	' '.&mt('scores from file').' </td></tr>'."\n";

    $result.='<tr bgcolor="#ffffe6"valign="top"><td colspan="2">'.
	'<input type="button" onClick="javascript:checkChoice(this.form,\'4\',\'scantron_selectphase\');'.
	'" value="'.&mt('Grade').'" /> scantron forms</td></tr>'."\n";

    if ((&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) && ($symb)) {
	$result.='<tr bgcolor="#ffffe6"valign="top"><td>'.
	    '<input type="button" onClick="javascript:checkChoice(this.form,\'5\',\'verify\');" value="'.&mt('Verify').'" />'.
	    ' '.&mt('receipt').': '.
	    &Apache::lonnet::recprefix($ENV{'request.course.id'}).
	    '-<input type="text" name="receipt" size="4" onChange="javascript:checkReceiptNo(this.form,\'OK\')">'.
	    '</td></tr>'."\n";
    } 

    $result.='</form></td></tr></table>'."\n".
	'</td></tr></table>'."\n".
	'</td></tr></table>'."\n";
    return $result;
}

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

    undef(%perm);
    if ($ENV{'browser.mathml'}) {
	&Apache::loncommon::content_type($request,'text/xml');
    } else {
	&Apache::loncommon::content_type($request,'text/html');
    }
    $request->send_http_header;
    return '' if $request->header_only;
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
    my $url=$ENV{'form.url'};
    my $symb=$ENV{'form.symb'};
    my @commands=&Apache::loncommon::get_env_multiple('form.command');
    my $command=$commands[0];
    if ($#commands > 0) {
	&Apache::lonnet::logthis("grades got multiple commands ".join(':',@commands));
    }
    if (!$url) {
	my ($temp1,$temp2);
	($temp1,$temp2,$ENV{'form.url'})=&Apache::lonnet::decode_symb($symb);
	$url = $ENV{'form.url'};
    }
    &send_header($request);
    if ($url eq '' && $symb eq '' && $command eq '') {
	if ($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)=&Apache::lonnet::decode_symb($tsymb);
		    if (&Apache::lonnet::allowed('mgr',$tcrsid)) {
			$request->print(&Apache::lonnet::ssi_body('/res/'.$url,
					  ('grade_username' => $tuname,
					   'grade_domain' => $tudom,
					   'grade_courseid' => $tcrsid,
					   'grade_symb' => $tsymb)));
		    } else {
			$request->print('<h3>Not authorized: '.$token.'</h3>');
		    }
		} else {
		    $request->print('<h3>Not a valid DocID: '.$token.'</h3>');
		}
	    } else {
		$request->print(&Apache::lonxml::tokeninputfield());
	    }
	}
    } else {
	if (!($perm{'vgr'}=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}))) {
	    if ($perm{'vgr'}=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'}.'/'.$ENV{'request.course.sec'})) {
		$perm{'vgr_section'}=$ENV{'request.course.sec'};
	    } else {
		delete($perm{'vgr'});
	    }
	}
	if (!($perm{'mgr'}=&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'}))) {
	    if ($perm{'mgr'}=&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'}.'/'.$ENV{'request.course.sec'})) {
		$perm{'mgr_section'}=$ENV{'request.course.sec'};
	    } else {
		delete($perm{'mgr'});
	    }
	}
	if ($command eq 'submission' && $perm{'vgr'}) {
	    ($ENV{'form.student'} eq '' ? &listStudents($request) : &submission($request,0,0));
	} elsif ($command eq 'pickStudentPage' && $perm{'vgr'}) {
	    &pickStudentPage($request);
	} elsif ($command eq 'displayPage' && $perm{'vgr'}) {
	    &displayPage($request);
	} elsif ($command eq 'gradeByPage' && $perm{'mgr'}) {
	    &updateGradeByPage($request);
	} elsif ($command eq 'processGroup' && $perm{'vgr'}) {
	    &processGroup($request);
	} elsif ($command eq 'gradingmenu' && $perm{'vgr'}) {
	    $request->print(&gradingmenu($request));
	} elsif ($command eq 'viewgrades' && $perm{'vgr'}) {
	    $request->print(&viewgrades($request));
	} elsif ($command eq 'handgrade' && $perm{'mgr'}) {
	    $request->print(&processHandGrade($request));
	} elsif ($command eq 'editgrades' && $perm{'mgr'}) {
	    $request->print(&editgrades($request));
	} elsif ($command eq 'verify' && $perm{'vgr'}) {
	    $request->print(&verifyreceipt($request));
	} elsif ($command eq 'csvform' && $perm{'mgr'}) {
	    $request->print(&upcsvScores_form($request));
	} elsif ($command eq 'csvupload' && $perm{'mgr'}) {
	    $request->print(&csvupload($request));
	} elsif ($command eq 'csvuploadmap' && $perm{'mgr'} ) {
	    $request->print(&csvuploadmap($request));
	} elsif ($command eq 'csvuploadassign' && $perm{'mgr'}) {
	    if ($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));
	    }
	} elsif ($command eq 'scantron_selectphase' && $perm{'mgr'}) {
	    $request->print(&scantron_selectphase($request));
 	} elsif ($command eq 'scantron_warning' && $perm{'mgr'}) {
 	    $request->print(&scantron_do_warning($request));
	} elsif ($command eq 'scantron_validate' && $perm{'mgr'}) {
	    $request->print(&scantron_validate_file($request));
	} elsif ($command eq 'scantron_process' && $perm{'mgr'}) {
	    $request->print(&scantron_process_students($request));
 	} elsif ($command eq 'scantronupload' && 
 		 (&Apache::lonnet::allowed('usc',$ENV{'request.role.domain'})||
		  &Apache::lonnet::allowed('usc',$ENV{'request.course.id'}))) {
 	    $request->print(&scantron_upload_scantron_data($request)); 
 	} elsif ($command eq 'scantronupload_save' &&
 		 (&Apache::lonnet::allowed('usc',$ENV{'request.role.domain'})||
		  &Apache::lonnet::allowed('usc',$ENV{'request.course.id'}))) {
 	    $request->print(&scantron_upload_scantron_data_save($request));
 	} elsif ($command eq 'scantron_download' &&
		 &Apache::lonnet::allowed('usc',$ENV{'request.course.id'})) {
 	    $request->print(&scantron_download_scantron_data($request));
	} elsif ($command) {
	    $request->print("Access Denied ($command)");
	}
    }
    &send_footer($request);
    return '';
}

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

sub send_footer {
    my ($request)= @_;
    $request->print('</body></html>');
}

1;

__END__;

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>