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File:  [LON-CAPA] / loncom / interface / lonparmset.pm
Revision 1.50: download - view: text, annotated - select for diffs
Wed Apr 10 15:30:45 2002 UTC (22 years ago) by matthew
Branches: MAIN
CVS tags: HEAD
Activated 'Browse' link for spreadsheet specification.

# The LearningOnline Network with CAPA
# Handler to set parameters for assessments
#
# $Id: lonparmset.pm,v 1.50 2002/04/10 15:30:45 matthew Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
# (Handler to resolve ambiguous file locations
#
# (TeX Content Handler
#
# YEAR=2000
# 05/29/00,05/30,10/11 Gerd Kortemeyer)
#
# 10/11,10/12,10/16 Gerd Kortemeyer)
#
# 11/20,11/21,11/22,11/23,11/24,11/25,11/27,11/28,
# 12/08,12/12,
# YEAR=2001
# 16/01/01,02/08,03/20,03/23,03/24,03/26,05/09,
# 07/05,07/06,08/08,08/09,09/01,09/21 Gerd Kortemeyer
# 12/17 Scott Harrison
# 12/19 Guy Albertelli
# 12/26,12/27 Gerd Kortemeyer
#
###

package Apache::lonparmset;

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


my %courseopt;
my %useropt;
my %parmhash;

my @ids;
my %symbp;
my %mapp;
my %typep;
my %keyp;

my $uname;
my $udom;
my $uhome;
my $csec;

# -------------------------------------------- Figure out a cascading parameter

sub parmval {
    my ($what,$id,$def)=@_;
    my $result='';
    my @outpar=();
# ----------------------------------------------------- Cascading lookup scheme

    my $symbparm=$symbp{$id}.'.'.$what;
    my $mapparm=$mapp{$id}.'___(all).'.$what;

    my $seclevel=$ENV{'request.course.id'}.'.['.$csec.'].'.$what;
    my $seclevelr=$ENV{'request.course.id'}.'.['.$csec.'].'.$symbparm;
    my $seclevelm=$ENV{'request.course.id'}.'.['.$csec.'].'.$mapparm;

    my $courselevel=$ENV{'request.course.id'}.'.'.$what;
    my $courselevelr=$ENV{'request.course.id'}.'.'.$symbparm;
    my $courselevelm=$ENV{'request.course.id'}.'.'.$mapparm;

# -------------------------------------------------------- first, check default

    if ($def) { $outpar[11]=$def; $result=11; }

# ----------------------------------------------------- second, check map parms

    my $thisparm=$parmhash{$symbparm};
    if ($thisparm) { $outpar[10]=$thisparm; $result=10; }

# --------------------------------------------------------- third, check course

    if ($courseopt{$courselevel}) {
	$outpar[9]=$courseopt{$courselevel};
	$result=9;
    }

    if ($courseopt{$courselevelm}) {
	$outpar[8]=$courseopt{$courselevelm};
	$result=8;
    }

    if ($courseopt{$courselevelr}) {
	$outpar[7]=$courseopt{$courselevelr};
	$result=7;
    }

    if ($csec) {
        if ($courseopt{$seclevel}) {
	    $outpar[6]=$courseopt{$seclevel};
	    $result=6;
	}
        if ($courseopt{$seclevelm}) {
	    $outpar[5]=$courseopt{$seclevelm};
	    $result=5;
	}

        if ($courseopt{$seclevelr}) {
	    $outpar[4]=$courseopt{$seclevelr};
	    $result=4;
	}
    }

# ---------------------------------------------------------- fourth, check user

    if ($uname) {
	if ($useropt{$courselevel}) {
	    $outpar[3]=$useropt{$courselevel};
	    $result=3;
	}

	if ($useropt{$courselevelm}) {
	    $outpar[2]=$useropt{$courselevelm};
	    $result=2;
	}

	if ($useropt{$courselevelr}) {
	    $outpar[1]=$useropt{$courselevelr};
	    $result=1;
	}
    }

    return ($result,@outpar);
}

# ------------------------------------------------------------ Output for value

sub valout {
    my ($value,$type)=@_;
    return ($value?(($type=~/^date/)?localtime($value):$value):'  ');
}

# -------------------------------------------------------- Produces link anchor

sub plink {
    my ($type,$dis,$value,$marker,$return,$call)=@_;
    my $winvalue=$value;
    unless ($winvalue) {
	if ($type=~/^date/) {
            $winvalue=$ENV{'form.recent_'.$type};
        } else {
            $winvalue=$ENV{'form.recent_'.(split(/\_/,$type))[0]};
        }
    }
    return 
	'<a href="javascript:pjump('."'".$type."','".$dis."','".$winvalue."','"
	    .$marker."','".$return."','".$call."'".');">'.
		&valout($value,$type).'</a><a name="'.$marker.'"></a>';
}


sub startpage {
    my ($r,$id,$udom,$csec,$uname)=@_;
    $r->content_type('text/html');
    $r->send_http_header;
    $r->print(<<ENDHEAD);
<html>
<head>
<title>LON-CAPA Course Parameters</title>
<script>

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

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

    }

    function psub() {
        pclose();
        if (document.parmform.pres_marker.value!='') {
            document.parmform.action+='#'+document.parmform.pres_marker.value;
            var typedef=new Array();
            typedef=document.parmform.pres_type.value.split('_');
           if (document.parmform.pres_type.value!='') {
            if (typedef[0]=='date') {
                eval('document.parmform.recent_'+
                     document.parmform.pres_type.value+
		     '.value=document.parmform.pres_value.value;');
            } else {
                eval('document.parmform.recent_'+typedef[0]+
		     '.value=document.parmform.pres_value.value;');
            }
	   }
            document.parmform.submit();
        } else {
            document.parmform.pres_value.value='';
            document.parmform.pres_marker.value='';
        }
    }

</script>
</head>
<body bgcolor="#FFFFFF" onUnload="pclose()">
<h1>Set Course Parameters</h1>
<form method="post" action="/adm/parmset" name="envform">
<h2>Course: $ENV{'course.'.$ENV{'request.course.id'}.'.description'}</h2>
<h3>Course Environment</h3>
<input type="submit" name="crsenv" value="Set Course Environment">
</form>
<form method="post" action="/adm/parmset" name="parmform">
<h3>Course Assessments</h3>
<b>
Section/Group:
<input type="text" value="$csec" size="6" name="csec">
<br>
For User 
<input type="text" value="$uname" size="12" name="uname">
or ID
<input type="text" value="$id" size="12" name="id"> 
at Domain 
<input type="text" value="$udom" size="6" name="udom">
</b>
<input type="hidden" value='' name="pres_value">
<input type="hidden" value='' name="pres_type">
<input type="hidden" value='' name="pres_marker">
ENDHEAD

}

sub print_row {
    my ($r,$which,$part,$name,$rid,$default,$type,$display,$defbgone,
	$defbgtwo)=@_;
    my ($result,@outpar)=&parmval($$part{$which}.'.'.$$name{$which},
				  $rid,$$default{$which});
    $r->print("<td bgcolor=".$defbgtwo.
	      '>'.$$part{$which}.'</td><td bgcolor='.$defbgone.
	      '>'.$$display{$which}.'</td>');
    my $thismarker=$which;
    $thismarker=~s/^parameter\_//;
    my $mprefix=$rid.'&'.$thismarker.'&';

    &print_td($r,11,'#FFDDDD',$result,\@outpar,$mprefix,$_,$type,$display);
    &print_td($r,10,'#FFDDDD',$result,\@outpar,$mprefix,$_,$type,$display);
    &print_td($r,9,$defbgone,$result,\@outpar,$mprefix,$_,$type,$display);
    &print_td($r,8,$defbgone,$result,\@outpar,$mprefix,$_,$type,$display);
    &print_td($r,7,$defbgone,$result,\@outpar,$mprefix,$_,$type,$display);
    if ($csec) {
	&print_td($r,6,$defbgtwo,$result,\@outpar,$mprefix,$_,$type,$display);
	&print_td($r,5,$defbgtwo,$result,\@outpar,$mprefix,$_,$type,$display);
	&print_td($r,4,$defbgtwo,$result,\@outpar,$mprefix,$_,$type,$display);
    }
    if ($uname) {
	&print_td($r,3,$defbgone,$result,\@outpar,$mprefix,$_,$type,$display);
	&print_td($r,2,$defbgone,$result,\@outpar,$mprefix,$_,$type,$display);
	&print_td($r,1,$defbgone,$result,\@outpar,$mprefix,$_,$type,$display);
    }
    $r->print('<td bgcolor=#CCCCFF>'.&valout($outpar[$result],$$type{$which}).'</td>');
    my $sessionval=&Apache::lonnet::EXT('resource.'.$$part{$which}.
					'.'.$$name{$which},$symbp{$rid});
    $r->print('<td bgcolor=#999999><font color=#FFFFFF>'.
	      &valout($sessionval,$$type{$which}).'&nbsp;'.
	      '</font></td>');
    $r->print('</tr>');
}

sub print_td {
    my ($r,$which,$defbg,$result,$outpar,$mprefix,$value,$type,$display)=@_;
    $r->print('<td bgcolor='.(($result==$which)?'"#AAFFAA"':$defbg).'>'.
	      &plink($$type{$value},$$display{$value},$$outpar[$which],
		     $mprefix."$which",'parmform.pres','psub').'</td>');
}

sub assessparms {

    my $r=shift;
# -------------------------------------------------------- Variable declaration
    my %allkeys;
    my %allmaps;
    my %defp;
    %courseopt=();
    %useropt=();
    my %bighash=();

    @ids=();
    %symbp=();
    %typep=();

    my $message='';

    $csec=$ENV{'form.csec'};
    $udom=$ENV{'form.udom'};
    unless ($udom) { $udom=$r->dir_config('lonDefDomain'); }

    my $pscat=$ENV{'form.pscat'};
    my $pschp=$ENV{'form.pschp'};
    my $pssymb='';

# ----------------------------------------------- Was this started from grades?

    if (($ENV{'form.command'} eq 'set') && ($ENV{'form.url'})
	&& (!$ENV{'form.dis'})) {
	my $url=$ENV{'form.url'};
	$url=~s-^http://($ENV{'SERVER_NAME'}|$ENV{'HTTP_HOST'})--;
	$pssymb=&Apache::lonnet::symbread($url);
	$pscat='all';
	$pschp='';
    } elsif ($ENV{'form.symb'}) {
	$pssymb=$ENV{'form.symb'};
	$pscat='all';
	$pschp='';
    } else {
	$ENV{'form.url'}='';
    }

    my $id=$ENV{'form.id'};
    if (($id) && ($udom)) {
	$uname=(&Apache::lonnet::idget($udom,$id))[1];
	if ($uname) {
	    $id='';
	} else {
	    $message=
		"<font color=red>Unknown ID '$id' at domain '$udom'</font>";
	}
    } else {
	$uname=$ENV{'form.uname'};
    }
    unless ($udom) { $uname=''; }
    $uhome='';
    if ($uname) {
	$uhome=&Apache::lonnet::homeserver($uname,$udom);
        if ($uhome eq 'no_host') {
	    $message=
		"<font color=red>Unknown user '$uname' at domain '$udom'</font>";
	    $uname='';
        } else {
	    $csec=&Apache::lonnet::usection($udom,$uname,
					    $ENV{'request.course.id'});
	    if ($csec eq '-1') {
		$message="<font color=red>".
		    "User '$uname' at domain '$udom' not ".
                    "in this course</font>";
		$uname='';
		$csec=$ENV{'form.csec'};
	    } else {
		my %name=&Apache::lonnet::userenvironment($udom,$uname,
		      ('firstname','middlename','lastname','generation','id'));
		$message="\n<p>\nFull Name: ".
		    $name{'firstname'}.' '.$name{'middlename'}.' '
			.$name{'lastname'}.' '.$name{'generation'}.
			    "<br>\nID: ".$name{'id'}.'<p>';
	    }
        }
    }

    unless ($csec) { $csec=''; }

    my $fcat=$ENV{'form.fcat'};
    unless ($fcat) { $fcat=''; }

# ------------------------------------------------------------------- Tie hashs
    if (!(tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
	      &GDBM_READER,0640))) {
	$r->print("Unable to access course data. (File $ENV{'request.course.fn'}.db not tieable)");
	return ;
    }
    if (!(tie(%parmhash,'GDBM_File',
	      $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640))) {
	$r->print("Unable to access parameter data. (File $ENV{'request.course.fn'}_parms.db not tieable)");
	return ;
    }
# --------------------------------------------------------- Get all assessments
    foreach (keys %bighash) {
	if ($_=~/^src\_(\d+)\.(\d+)$/) {
	    my $mapid=$1;
	    my $resid=$2;
	    my $id=$mapid.'.'.$resid;
	    my $srcf=$bighash{$_};
	    if ($srcf=~/\.(problem|exam|quiz|assess|survey|form)$/) {
		$ids[$#ids+1]=$id;
		$typep{$id}=$1;
		$keyp{$id}='';
		foreach (split(/\,/,
			       &Apache::lonnet::metadata($srcf,'keys'))) {
		    if ($_=~/^parameter\_(.*)/) {
			my $key=$_;
			my $allkey=$1;
			$allkey=~s/\_/\./;
			my $display=
			    &Apache::lonnet::metadata($srcf,$key.'.display');
			unless ($display) {
			    $display=
				&Apache::lonnet::metadata($srcf,$key.'.name');
			}
			$allkeys{$allkey}=$display;
			if ($allkey eq $fcat) {
			    $defp{$id}=
				&Apache::lonnet::metadata($srcf,$key);
			}
			if ($keyp{$id}) {
			    $keyp{$id}.=','.$key;
			} else {
			    $keyp{$id}=$key;
			}
		    }
		}
		$mapp{$id}=
		    &Apache::lonnet::declutter($bighash{'map_id_'.$mapid});
		$allmaps{$mapid}=$mapp{$id};
		$symbp{$id}=$mapp{$id}.
			'___'.$resid.'___'.
			    &Apache::lonnet::declutter($srcf);
	    }
	}
    }
# ---------------------------------------------------------- Anything to store?
    if ($ENV{'form.pres_marker'}) {
	my ($sresid,$spnam,$snum)=split(/\&/,$ENV{'form.pres_marker'});
	$spnam=~s/\_([^\_]+)$/\.$1/;
# ---------------------------------------------------------- Construct prefixes

	my $symbparm=$symbp{$sresid}.'.'.$spnam;
	my $mapparm=$mapp{$sresid}.'___(all).'.$spnam;
	
	my $seclevel=$ENV{'request.course.id'}.'.['.$csec.'].'.$spnam;
	my $seclevelr=$ENV{'request.course.id'}.'.['.$csec.'].'.$symbparm;
	my $seclevelm=$ENV{'request.course.id'}.'.['.$csec.'].'.$mapparm;
	
	my $courselevel=$ENV{'request.course.id'}.'.'.$spnam;
	my $courselevelr=$ENV{'request.course.id'}.'.'.$symbparm;
	my $courselevelm=$ENV{'request.course.id'}.'.'.$mapparm;
	
	my $storeunder='';
	if (($snum==9) || ($snum==3)) { $storeunder=$courselevel; }
	if (($snum==8) || ($snum==2)) { $storeunder=$courselevelm; }
	if (($snum==7) || ($snum==1)) { $storeunder=$courselevelr; }
	if ($snum==6) { $storeunder=$seclevel; }
	if ($snum==5) { $storeunder=$seclevelm; }
	if ($snum==4) { $storeunder=$seclevelr; }
	
        my %storecontent = ($storeunder        => $ENV{'form.pres_value'},
                            $storeunder.'type' => $ENV{'form.pres_type'});
	my $reply='';
	if ($snum>3) {
# ---------------------------------------------------------------- Store Course
#
# Expire sheets
	    &Apache::lonnet::expirespread('','','studentcalc');
	    if (($snum==7) || ($snum==4)) {
		&Apache::lonnet::expirespread('','','assesscalc',$symbp{$sresid});
	    } elsif (($snum==8) || ($snum==5)) {
		&Apache::lonnet::expirespread('','','assesscalc',$mapp{$sresid});
	    } else {
		&Apache::lonnet::expirespread('','','assesscalc');
	    }
# Store parameter
            $reply=&Apache::lonnet::cput
                ('resourcedata',\%storecontent,
                 $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
                 $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
	} else {
# ------------------------------------------------------------------ Store User
#
# Expire sheets
	    &Apache::lonnet::expirespread($uname,$udom,'studentcalc');
	    if ($snum==1) {
		&Apache::lonnet::expirespread
		    ($uname,$udom,'assesscalc',$symbp{$sresid});
	    } elsif ($snum==2) {
		&Apache::lonnet::expirespread
		    ($uname,$udom,'assesscalc',$mapp{$sresid});
	    } else {
		&Apache::lonnet::expirespread($uname,$udom,'assesscalc');
	    }
# Store parameter
	    $reply=&Apache::lonnet::cput
                ('resourcedata',\%storecontent,$udom,$uname);
	}

	if ($reply=~/^error\:(.*)/) {
	    $message.="<font color=red>Write Error: $1</font>";
	}
# ---------------------------------------------------------------- Done storing
    }
# -------------------------------------------------------------- Get coursedata
    %courseopt = &Apache::lonnet::dump
        ('resourcedata',
         $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
         $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
# --------------------------------------------------- Get userdata (if present)
    if ($uname) {
        %useropt=&Apache::lonnet::dump('resourcedata',$udom,$uname);
    }

# ------------------------------------------------------------------- Sort this

    @ids=sort  {
	if ($fcat eq '') {
	    $a<=>$b;
	} else {
	    my ($result,@outpar)=&parmval($fcat,$a,$defp{$a});
	    my $aparm=$outpar[$result];
	    ($result,@outpar)=&parmval($fcat,$b,$defp{$b});
	    my $bparm=$outpar[$result];
	    1*$aparm<=>1*$bparm;
	}
    } @ids;

# ------------------------------------------------------------------ Start page
    &startpage($r,$id,$udom,$csec,$uname);
#    if ($ENV{'form.url'}) {
#	$r->print('<input type="hidden" value="'.$ENV{'form.url'}.
#		  '" name="url"><input type="hidden" name="command" value="set">');
#    }
    foreach ('tolerance','date_default','date_start','date_end',
	     'date_interval','int','float','string') {
	$r->print('<input type="hidden" value="'.
		  $ENV{'form.recent_'.$_}.'" name="recent_'.$_.'">');
    }

    $r->print('<h2>'.$message.'</h2><table><tr><td>Sort list by</td><td>');
    $r->print('<select name="fcat">');
    $r->print('<option value="">Enclosing Map</option>');
    foreach (reverse sort keys %allkeys) {
	$r->print('<option value="'.$_.'"');
	if ($fcat eq $_) { $r->print(' selected'); }
	$r->print('>'.$allkeys{$_}.'</option>');
    }
    if (!$pssymb) {
	$r->print('</select></tr><tr><td>Select Enclosing Map</td><td><select name=pschp>');
	$r->print('<option value=all>All Maps</option>');
	foreach (sort keys %allmaps) {
	    $r->print('<option value="'.$_.'"');
	    if (($pssymb=~/^$allmaps{$_}/) || 
		($pschp eq $_)) { $r->print(' selected'); }
	    $r->print('>'.$allmaps{$_}.'</option>');
	}
    } else {
	my ($map,$id,$resource)=split(/___/,$pssymb);
	$r->print('<tr><td>Specfic Resource</td><td>&nbsp;</td></tr>');
	$r->print('<input type="hidden" value="'.$pssymb.'" name="symb">');
    }
    $r->print('</select></td></tr><tr><td>Select Parameter</td><td><select name=pscat>');
    $r->print('<option value=all>All Parameters</option>');
    foreach (reverse sort keys %allkeys) {
	$r->print('<option value="'.$_.'"');
	if ($pscat eq $_) { $r->print(' selected'); }
	$r->print('>'.$allkeys{$_}.'</option>');
    }
    $r->print('</select></td></tr></table><br><input name=dis type="submit" value="Display">');
    if (($pscat) || ($pschp) || ($pssymb)) {
# ----------------------------------------------------------------- Start Table
	my $catmarker='parameter_'.$pscat;
	$catmarker=~s/\./\_/g;
	my $coursespan=$csec?8:5;
	my $csuname=$ENV{'user.name'};
	my $csudom=$ENV{'user.domain'};
	$r->print(<<ENDTABLEHEAD);
<p><table border=2>
<tr><td colspan=5></td>
<th colspan=$coursespan>Any User</th>
ENDTABLEHEAD
	if ($uname) {
	    $r->print("<th colspan=3 rowspan=2>User $uname at Domain $udom</th>");
	}
	$r->print(<<ENDTABLETWO);
<th rowspan=3>Parameter in Effect</th>
<th rowspan=3>Current Session Value<br>($csuname at $csudom)</th>
</tr><tr><td colspan=5></td>
<th colspan=2>Resource Level</th>
<th colspan=3>in Course</th>
ENDTABLETWO
	if ($csec) {
	    $r->print("<th colspan=3>in Section/Group $csec</th>");
	}
	$r->print(<<ENDTABLEHEADFOUR);
</tr><tr><th>Assessment URL and Title</th><th>Type</th>
<th>Enclosing Map</th><th>Part No.</th><th>Parameter Name</th>
<th>default</th><th>from Enclosing Map</th>
<th>general</th><th>for Enclosing Map</th><th>for Resource</th>
ENDTABLEHEADFOUR
	if ($csec) {
	    $r->print('<th>general</th><th>for Enclosing Map</th><th>for Resource</th>');
	}
	if ($uname) {
	    $r->print('<th>general</th><th>for Enclosing Map</th><th>for Resource</th>');
	}
	$r->print('</tr>');
	my $defbgone='';
	my $defbgtwo='';
	foreach (@ids) {
	    my $rid=$_;
	    my ($inmapid)=($rid=~/\.(\d+)$/);
	    if (($pschp eq 'all') || ($allmaps{$pschp} eq $mapp{$rid}) ||
		($pssymb eq $symbp{$rid})) {
# ------------------------------------------------------ Entry for one resource
		if ($defbgone eq '"E0E099"') {
		    $defbgone='"E0E0DD"';
		} else {
		    $defbgone='"E0E099"';
		}
		if ($defbgtwo eq '"FFFF99"') {
		    $defbgtwo='"FFFFDD"';
		} else {
		    $defbgtwo='"FFFF99"';
		}
		my $thistitle='';
		my %name=   ();
		undef %name;
		my %part=   ();
		my %display=();
		my %type=   ();
		my %default=();
		my $uri=&Apache::lonnet::declutter($bighash{'src_'.$rid});
		
		foreach (split(/\,/,$keyp{$rid})) {
		    if (($_ eq $catmarker) || ($pscat eq 'all')) {
			$part{$_}=&Apache::lonnet::metadata($uri,$_.'.part');
			$name{$_}=&Apache::lonnet::metadata($uri,$_.'.name');
			$display{$_}=&Apache::lonnet::metadata($uri,$_.'.display');
			unless ($display{$_}) { $display{$_}=''; }
			$display{$_}.=' ('.$name{$_}.')';
			$default{$_}=&Apache::lonnet::metadata($uri,$_);
			$type{$_}=&Apache::lonnet::metadata($uri,$_.'.type');
			$thistitle=&Apache::lonnet::metadata($uri,$_.'.title');
		    }
		}
		my $totalparms=scalar keys %name;
		if ($totalparms>0) {
		    my $firstrow=1;
		    $r->print('<tr><td bgcolor='.$defbgone.
			      ' rowspan='.$totalparms.'><tt><font size=-1>'.
			      join(' / ',split(/\//,$uri)).
			      '</font></tt><p><b>'.
			      $bighash{'title_'.$rid});
		    if ($thistitle) {
			$r->print(' ('.$thistitle.')');
		    }
		    $r->print('</b></td>');
		    $r->print('<td bgcolor='.$defbgtwo.
			      ' rowspan='.$totalparms.'>'.$typep{$rid}.'</td>');
		    $r->print('<td bgcolor='.$defbgone.
			      ' rowspan='.$totalparms.'><tt><font size=-1>'.
			      join(' / ',split(/\//,$mapp{$rid})).'</font></tt></td>');
		    foreach (sort keys %name) {
			unless ($firstrow) {
			    $r->print('<tr>');
			} else {
			    $firstrow=0;
			}
			&print_row($r,$_,\%part,\%name,$rid,\%default,
				   \%type,\%display,$defbgone,$defbgtwo);
		    }
		}
# -------------------------------------------------- End entry for one resource
	    }
	}
	$r->print('</table>');
    }
    $r->print('</form></body></html>');
    untie(%bighash);
    untie(%parmhash);
}

# Set course environment parameters
sub crsenv {
    my $r=shift;
    my $setoutput='';
    my $dom = $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
    my $crs = $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
# -------------------------------------------------- Go through list of changes
    foreach (keys %ENV) {
	if ($_=~/^form\.(.+)\_setparmval$/) {
            my $name=$1;
            my $value=$ENV{'form.'.$name.'_value'};
            if ($name eq 'newp') {
                $name=$ENV{'form.newp_name'};
            }
            if ($name eq 'url') {
		$value=~s/^\/res\///;
                my @tmp = &Apache::lonnet::get
                    ('environment',['url'],$dom,$crs);
                $setoutput.='Backing up previous URL: '.
                    &Apache::lonnet::put
                        ('environment',
                         {'top level map backup ' => $tmp[1] },
                         $dom,$crs).
                    '<br>';
            }
            if ($name) {
                $setoutput.='Setting <tt>'.$name.'</tt> to <tt>'.
                    $value.'</tt>: '.
                    &Apache::lonnet::put
                            ('environment',{$name=>$value},$dom,$crs).
                    '<br>';
	    }
        }
    }
# -------------------------------------------------------- Get parameters again

    my %values=&Apache::lonnet::dump('environment',$dom,$crs);
    my $output='';
    if (! exists($values{'con_lost'})) {
        my %descriptions=
	    ('url'            => '<b>Top Level Map</b> '.
                                 '<a href="javascript:openbrowser'.
                                 "('envform','url','sequence')\">".
                                 'Browse</a><br><font color=red> '.
                                 'Modification may make assessment data '.
                                 'inaccessible</font>',
             'description'    => '<b>Course Description</b>',
             'courseid'       => '<b>Course ID or number</b><br>'.
                                 '(internal, optional)',
             'question.email' => '<b>Feedback Addresses for Content '.
                                 'Questions</b><br>(<tt>user:domain,'.
                                 'user:domain,...</tt>)',
             'comment.email'  => '<b>Feedback Addresses for Comments</b><br>'.
                                 '(<tt>user:domain,user:domain,...</tt>)',
             'policy.email'   => '<b>Feedback Addresses for Course Policy</b>'.
                                 '<br>(<tt>user:domain,user:domain,...</tt>)',
             'hideemptyrows'  => '<b>Hide Empty Rows in Spreadsheets</b><br>'.
                                 '("<tt>yes</tt>" for default hiding)',
             'pch.roles.denied'=> '<b>Disallow Resource Discussion for '.
                                  'Students</b><br>"<tt>st</tt>": '.
                                  'student, "<tt>ta</tt>": '.
                                  'TA, "<tt>in</tt>": '.
                                  'instructor;<br><tt>role,role,...</tt>)',
             'spreadsheet_default_classcalc' 
                 => '<b>Default course spreadsheet</b>'.
                    '<a href="javascript:openbrowser'.
                    "('envform','spreadsheet_default_classcalc'".
                    ",'spreadsheet')\">Browse</a><br>",
             'spreadsheet_default_studentcalc' 
                 => '<b>Default student spreadsheet</b>'.
                    '<a href="javascript:openbrowser'.
                    "('envform','spreadsheet_default_calc'".
                    ",'spreadsheet')\">Browse</a><br>",
             'spreadsheet_default_assesscalc' 
                 => '<b>Default assessment spreadsheet</b>'.
                    '<a href="javascript:openbrowser'.
                    "('envform','spreadsheet_default_assesscalc'".
                    ",'spreadsheet')\">Browse</a><br>",
             );
	foreach (keys(%values)) {
	    unless ($descriptions{$_}) {
		$descriptions{$_}=$_;
	    }
	}
	foreach (sort keys %descriptions) {
	    $output.='<tr><td>'.$descriptions{$_}.'</td><td><input name="'.
		$_.'_value" size=40 value="'.
		$values{$_}.'"></td><td><input type=checkbox name="'.
		$_.'_setparmval"></td></tr>';
	}
	$output.='<tr><td><i>Create New Environment Variable</i><br>'.
	    '<input type="text" size=40 name="newp_name"  ></td><td>'.
            '<input type="text" size=40 name="newp_value" ></td><td>'.
	    '<input type="checkbox" name="newp_setparmval"></td></tr>';
    }
    $r->print(<<ENDENV);
<html>
<script type="text/javascript" language="Javascript" >
    var editbrowser;
    function openbrowser(formname,elementname,only,omit) {
        var url = '/res/?';
        if (editbrowser == null) {
            url += 'launch=1&';
        }
        url += 'catalogmode=interactive&';
        url += 'mode=parmset&';
        url += 'form=' + formname + '&';
        if (only != null) {
            url += 'only=' + only + '&';
        } 
        if (omit != null) {
            url += 'omit=' + omit + '&';
        }
        url += 'element=' + elementname + '';
        var title = 'Browser';
        var options = 'scrollbars=1,resizable=1,menubar=0';
        options += ',width=700,height=600';
        editbrowser = open(url,title,options,'1');
        editbrowser.focus();
    }
</script>
<head>
<title>LON-CAPA Course Environment</title>
</head>
<body bgcolor="#FFFFFF">
<h1>Set Course Parameters</h1>
<form method="post" action="/adm/parmset" name="envform">
<h2>Course: $ENV{'course.'.$ENV{'request.course.id'}.'.description'}</h2>
<h3>Course Environment</h3>
$setoutput
<p>
<table border=2>
<tr><th>Parameter</th><th>Value</th><th>Set?</th></tr>
$output
</table>
<input type="submit" name="crsenv" value="Set Course Environment">
</form>
</body>
</html>    
ENDENV
}

# ================================================================ Main Handler

sub handler {
    my $r=shift;

    if ($r->header_only) {
	$r->content_type('text/html');
	$r->send_http_header;
	return OK;
    }
    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
# ----------------------------------------------------- Needs to be in a course

    if (($ENV{'request.course.id'}) && 
	(&Apache::lonnet::allowed('opa',$ENV{'request.course.id'}))) {

	unless (($ENV{'form.crsenv'}) || (!$ENV{'request.course.fn'})) {
# --------------------------------------------------------- Bring up assessment
	    &assessparms($r);
# ---------------------------------------------- This is for course environment
	} else {
	    &crsenv($r);
	}
    } else {
# ----------------------------- Not in a course, or not allowed to modify parms
	$ENV{'user.error.msg'}=
	    "/adm/parmset:opa:0:0:Cannot modify assessment parameters";
	return HTTP_NOT_ACCEPTABLE;
    }
    return OK;
}

1;
__END__


=head1 NAME

Apache::lonparmset - Handler to set parameters for assessments

=head1 SYNOPSIS

Invoked by /etc/httpd/conf/srm.conf:

 <Location /adm/parmset>
 PerlAccessHandler       Apache::lonacc
 SetHandler perl-script
 PerlHandler Apache::lonparmset
 ErrorDocument     403 /adm/login
 ErrorDocument     406 /adm/roles
 ErrorDocument	  500 /adm/errorhandler
 </Location>

=head1 INTRODUCTION

This module sets assessment parameters.

This is part of the LearningOnline Network with CAPA project
described at http://www.lon-capa.org.

=head1 HANDLER SUBROUTINE

This routine is called by Apache and mod_perl.

=over 4

=item *

need to be in course

=item *

bring up assessment screen or course environment

=back

=head1 OTHER SUBROUTINES

=over 4

=item *

parmval() : figure out a cascading parameter

=item *

valout() : format a value for output

=item *

plink() : produces link anchor

=item *

assessparms() : show assess data and parameters

=item *

crsenv() : for the course environment

=back

=cut
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