[BACK]Return to lonnavmaps.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom / interface
File:  [LON-CAPA] / loncom / interface / lonnavmaps.pm
Revision 1.28: download - view: text, annotated - select for diffs
Fri Mar 15 16:31:10 2002 UTC (22 years, 2 months ago) by albertel
Branches: MAIN
CVS tags: HEAD
- reindented to be consistent thru out the handler and tracetable functions

# The LearningOnline Network with CAPA
# Navigate Maps Handler
#
# $Id: lonnavmaps.pm,v 1.28 2002/03/15 16:31:10 albertel 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/
#
# (Page Handler
#
# (TeX Content Handler
#
# 05/29/00,05/30 Gerd Kortemeyer)
# 08/30,08/31,09/06,09/14,09/15,09/16,09/19,09/20,09/21,09/23,
# 10/02,10/10,10/14,10/16,10/18,10/19,10/31,11/6,11/14,11/16 Gerd Kortemeyer)
#
# 3/1/1,6/1,17/1,29/1,30/1,2/8,9/21,9/24,9/25 Gerd Kortemeyer
# YEAR=2002
# 1/1 Gerd Kortemeyer
#

package Apache::lonnavmaps;

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

# -------------------------------------------------------------- Module Globals
my %hash;
my @rows;

#
# These cache hashes need to be independent of user, resource and course
# (user and course can/should be in the keys)
#

my %courserdatas;
my %userrdatas;

#
# These global hashes are dependent on user, course and resource, 
# and need to be initialized every time when a sheet is calculated
#
my %courseopt;
my %useropt;
my %parmhash;

# ------------------------------------------------------------------ Euclid gcd

sub euclid {
    my ($e,$f)=@_;
    my $a; my $b; my $r;
    if ($e>$f) { $b=$e; $r=$f; } else { $r=$e; $b=$f; }
    while ($r!=0) {
	$a=$b; $b=$r;
        $r=$a%$b;
    }
    return $b;
}

# --------------------------------------------------------------------- Parmval

# -------------------------------------------- Figure out a cascading parameter
#
# For this function to work
#
# * parmhash needs to be tied
# * courseopt and useropt need to be initialized for this user and course
#

sub parmval {
    my ($what,$symb)=@_;
    my $cid=$ENV{'request.course.id'};
    my $csec=$ENV{'request.course.sec'};
    my $uname=$ENV{'user.name'};
    my $udom=$ENV{'user.domain'};

    unless ($symb) { return ''; }
    my $result='';

    my ($mapname,$id,$fn)=split(/\_\_\_/,$symb);

# ----------------------------------------------------- Cascading lookup scheme
    my $rwhat=$what;
    $what=~s/^parameter\_//;
    $what=~s/\_/\./;

    my $symbparm=$symb.'.'.$what;
    my $mapparm=$mapname.'___(all).'.$what;
    my $usercourseprefix=$uname.'_'.$udom.'_'.$cid;

    my $seclevel= $usercourseprefix.'.['.$csec.'].'.$what;
    my $seclevelr=$usercourseprefix.'.['.$csec.'].'.$symbparm;
    my $seclevelm=$usercourseprefix.'.['.$csec.'].'.$mapparm;

    my $courselevel= $usercourseprefix.'.'.$what;
    my $courselevelr=$usercourseprefix.'.'.$symbparm;
    my $courselevelm=$usercourseprefix.'.'.$mapparm;

# ---------------------------------------------------------- first, check user
    if ($uname) {
	if ($useropt{$courselevelr}) { return $useropt{$courselevelr}; }
	if ($useropt{$courselevelm}) { return $useropt{$courselevelm}; }
	if ($useropt{$courselevel}) { return $useropt{$courselevel}; }
    }

# ------------------------------------------------------- second, check course
    if ($csec) {
	if ($courseopt{$seclevelr}) { return $courseopt{$seclevelr}; }
        if ($courseopt{$seclevelm}) { return $courseopt{$seclevelm}; }
        if ($courseopt{$seclevel}) { return $courseopt{$seclevel}; }
    }

    if ($courseopt{$courselevelr}) { return $courseopt{$courselevelr}; }
    if ($courseopt{$courselevelm}) { return $courseopt{$courselevelm}; }
    if ($courseopt{$courselevel}) { return $courseopt{$courselevel}; }

# ----------------------------------------------------- third, check map parms

    my $thisparm=$parmhash{$symbparm};
    if ($thisparm) { return $thisparm; }

# ----------------------------------------------------- fourth , check default

    my $default=&Apache::lonnet::metadata($fn,$rwhat.'.default');
    if ($default) { return $default}

# --------------------------------------------------- fifth , cascade up parts

    my ($space,@qualifier)=split(/\./,$rwhat);
    my $qualifier=join('.',@qualifier);
    unless ($space eq '0') {
	my ($part,$id)=split(/\_/,$space);
	if ($id) {
	    my $partgeneral=&parmval($part.".$qualifier",$symb);
	    if ($partgeneral) { return $partgeneral; }
	} else {
	    my $resourcegeneral=&parmval("0.$qualifier",$symb);
	    if ($resourcegeneral) { return $resourcegeneral; }
	}
    }
    return '';
}



# ------------------------------------------------------------- Find out status
# return codes
# tcode (timecode)
# 1: will open later
# 2: is open and not past due yet
# 3: is past due date
# 4: due in the next 24 hours
#
# code (curent solved status)
# 1: not attempted
# 2: attempted but wrong, or incorrect by instructor
# 3: solved or correct by instructor
# "excused" needs to be supported, but is not yet. Could be code=4.
sub astatus {
    my $rid=shift;
    my $code=1;
    my $ctext='';
    $rid=~/(\d+)\.(\d+)/;
    my $symb=&Apache::lonnet::declutter($hash{'map_id_'.$1}).'___'.$2.'___'.
	&Apache::lonnet::declutter($hash{'src_'.$rid});
    my %duedate=();
    my %opendate=();
    my %answerdate=();
    # need to always check part 0's open/due/answer status
    foreach (sort(split(/\,/,&Apache::lonnet::metadata($hash{'src_'.$rid},'keys')))) {
        if ($_=~/^parameter\_(.*)\_opendate$/) {
	    my $part=$1;
            $duedate{$part}=&parmval($part.'.duedate',$symb);
            $opendate{$part}=&parmval($part.'.opendate',$symb);
            $answerdate{$part}=&parmval($part.'.answerdate',$symb);
        }
    }
    my $now=time;
    my $tcode=0;

    my %returnhash=&Apache::lonnet::restore($symb);

    foreach (sort(keys(%opendate))) {
	my $duedate=$duedate{$_};
	my $opendate=$opendate{$_};
	my $answerdate=$answerdate{$_};
	my $preface='';
	unless ($_ eq '0') { $preface=' Part: '.$_.' '; }
	if ($opendate) {
	    if ($now<$duedate || (!$duedate)) {
		unless ($tcode==4) { $tcode=2; }
		if ($duedate) {
		    $ctext.=$preface.'Due: '.localtime($duedate);
		} else {
		    $ctext.=$preface.'No Due Date';
		}
		if ($now<$opendate) {
		    unless ($tcode) { $tcode=1; }
		    $ctext.=$preface.'Open: '.localtime($opendate);
		}
		if ($duedate && $duedate-$now<86400) {
		    $tcode=4;
		    $ctext.=$preface.'Due: '.localtime($duedate);
		}
	    } else {
		unless (($tcode==4) || ($tcode eq 2)) { $tcode=3; }
		if ($now<$answerdate) {
		    $ctext.='Answer: '.localtime($duedate);
		}
	    }
	} else {
	    unless (($tcode==2) || ($tcode==4)) { $tcode=1; }
	}
	
	my $status=$returnhash{'resource.'.$_.'.solved'};
	
	if ($status eq 'correct_by_student') {
	    unless ($code==2) { $code=3; }
	    $ctext.=' solved';
	} elsif ($status eq 'correct_by_override') {
	    unless ($code==2) { $code=3; }
	    $ctext.=' override';
	} elsif ($status eq 'incorrect_attempted') {
	    $code=2;
	    $ctext.=' ('.
		($returnhash{'resource.'.$_.'.tries'}?
		 $returnhash{'resource.'.$_.'.tries'}:'0');
	    my $numtries = &parmval($_.'.maxtries',$symb);
	    if ($numtries) { $ctext.='/'.$numtries.' tries'; }
	    $ctext.=')';
	} elsif ($status eq 'incorrect_by_override') {
	    $code=2;
	    $ctext.=' override';
	} elsif ($status eq 'excused') {
	    unless ($code==2) { $code=3; }
	    $ctext.=' excused';
	}
    }

    return 'p'.$code.$tcode.'"'.$ctext.'"';
}

# ------------------------------------------------------------ Build page table

sub tracetable {
    my ($sofar,$rid,$beenhere)=@_;
    my $further=$sofar;
    unless ($beenhere=~/\&$rid\&/) {
	$beenhere.=$rid.'&';  
	
	if (defined($hash{'is_map_'.$rid})) {
	    $sofar++;
	    my $tprefix='';
	    if ($hash{'map_type_'.$hash{'map_pc_'.$hash{'src_'.$rid}}} 
		eq 'sequence') { 
		$tprefix='h'; 
	    }
	    if (defined($rows[$sofar])) {
		$rows[$sofar].='&'.$tprefix.$rid;
	    } else {
		$rows[$sofar]=$tprefix.$rid;
	    }
	    if ((defined($hash{'map_start_'.$hash{'src_'.$rid}})) &&
		(defined($hash{'map_finish_'.$hash{'src_'.$rid}})) &&
		($tprefix eq 'h')) {
		my $frid=$hash{'map_finish_'.$hash{'src_'.$rid}};
		$sofar=
		    &tracetable($sofar,$hash{'map_start_'.$hash{'src_'.$rid}},
				'&'.$frid.'&');
		$sofar++;
		if ($hash{'src_'.$frid}) {
		    my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$frid});
		    if (($brepriv eq '2') || ($brepriv eq 'F')) {
			my $pprefix='';
			if ($hash{'src_'.$frid}=~
			    /\.(problem|exam|quiz|assess|survey|form)$/) {
			    $pprefix=&astatus($frid);
			
			}
			if (defined($rows[$sofar])) {
			    $rows[$sofar].='&'.$pprefix.$frid;
			} else {
			    $rows[$sofar]=$pprefix.$frid;
			}
		    }
		}
	    }
	} else {
	    $sofar++;
	    if ($hash{'src_'.$rid}) {
		my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$rid});
		if (($brepriv eq '2') || ($brepriv eq 'F')) {
		    my $pprefix='';
		    if ($hash{'src_'.$rid}=~
			/\.(problem|exam|quiz|assess|survey|form)$/) {
			$pprefix=&astatus($rid);
		    }
		    if (defined($rows[$sofar])) {
			$rows[$sofar].='&'.$pprefix.$rid;
		    } else {
			$rows[$sofar]=$pprefix.$rid;
		    }
		}
	    }
	}
	
	if (defined($hash{'to_'.$rid})) {
	    my $mincond=1;
	    my $next='';
	    foreach (split(/\,/,$hash{'to_'.$rid})) {
		my $thiscond=
		    &Apache::lonnet::directcondval($hash{'condid_'.$hash{'undercond_'.$_}});
		if ($thiscond>=$mincond) {
		    if ($next) {
			$next.=','.$_.':'.$thiscond;
		    } else {
			$next=$_.':'.$thiscond;
		    }
		    if ($thiscond>$mincond) { $mincond=$thiscond; }
		}
	    }
	    foreach (split(/\,/,$next)) {
		my ($linkid,$condval)=split(/\:/,$_);
		if ($condval>=$mincond) {
		    my $now=&tracetable($sofar,$hash{'goesto_'.$linkid},$beenhere);
		    if ($now>$further) { $further=$now; }
		}
	    }
	}
    }
    return $further;
}

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

sub handler {
    my $r=shift;


# ------------------------------------------- Set document type for header only

    if ($r->header_only) {
	if ($ENV{'browser.mathml'}) {
	    $r->content_type('text/xml');
	} else {
	    $r->content_type('text/html');
	}
	$r->send_http_header;
	return OK;
    }
    my $requrl=$r->uri;
    my $hashtied;
# ----------------------------------------------------------------- Tie db file
    my $fn;
    if ($ENV{'request.course.fn'}) {
	$fn=$ENV{'request.course.fn'};
	if (-e "$fn.db") {
	    if ((tie(%hash,'GDBM_File',"$fn.db",&GDBM_READER,0640)) &&
		(tie(%parmhash,'GDBM_File',
		     $ENV{'request.course.fn'}.'_parms.db',
		     &GDBM_READER,0640))) {
		$hashtied=1;
	    }
	}
    }
    if (!$hashtied) {
	$ENV{'user.error.msg'}="$requrl:bre:0:0:Course not initialized";
	return HTTP_NOT_ACCEPTABLE; 
    }

# ------------------------------------------------------------------- Hash tied

    if ($ENV{'browser.mathml'}) {
	$r->content_type('text/xml');
    } else {
	$r->content_type('text/html');
    }
    &Apache::loncommon::no_cache($r);
    $r->send_http_header;

    my $firstres=$hash{'map_start_/res/'.$ENV{'request.course.uri'}};
    my $lastres=$hash{'map_finish_/res/'.$ENV{'request.course.uri'}};
    if (!(($firstres) && ($lastres))) {
	$r->print('<html><body>Coursemap undefined.</body></html>');
    } else {

# ----------------------------------------------------------------- Render page
# -------------------------------------------------------------- Set parameters


# ---------------------------- initialize coursedata and userdata for this user
	undef %courseopt;
	undef %useropt;

	my $uname=$ENV{'user.name'};
	my $udom=$ENV{'user.domain'};
	my $uhome=$ENV{'user.home'};
	my $cid=$ENV{'request.course.id'};
	my $chome=$ENV{'course.'.$cid.'.home'};
	my ($cdom,$cnum)=split(/\_/,$cid);

	my $userprefix=$uname.'_'.$udom.'_';

	unless ($uhome eq 'no_host') { 
# -------------------------------------------------------------- Get coursedata
	    unless ((time-$courserdatas{$cid.'.last_cache'})<240) {
		my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.
						 ':resourcedata',$chome);
		if ($reply!~/^error\:/) {
		    $courserdatas{$cid}=$reply;
		    $courserdatas{$cid.'.last_cache'}=time;
		}
	    }
	    foreach (split(/\&/,$courserdatas{$cid})) {
		my ($name,$value)=split(/\=/,$_);
		$courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
		    &Apache::lonnet::unescape($value);
	    }
# --------------------------------------------------- Get userdata (if present)
	    unless ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
		my $reply=&Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);
		if ($reply!~/^error\:/) {
		    $userrdatas{$uname.'___'.$udom}=$reply;
		    $userrdatas{$uname.'___'.$udom.'.last_cache'}=time;
		}
	    }
	    foreach (split(/\&/,$userrdatas{$uname.'___'.$udom})) {
		my ($name,$value)=split(/\=/,$_);
		$useropt{$userprefix.&Apache::lonnet::unescape($name)}=
		    &Apache::lonnet::unescape($value);
	    }
	}

	@rows=();

	&tracetable(0,$firstres,'&'.$lastres.'&');
	if ($hash{'src_'.$lastres}) {
	    my $brepriv=&Apache::lonnet::allowed('bre',$hash{'src_'.$lastres});
	    if (($brepriv eq '2') || ($brepriv eq 'F')) {
		$rows[$#rows+1]=''.$lastres;
	    }
	}

# ------------------------------------------------------------------ Page parms

	my $j;
	my $i;
	my $lcm=1;
	my $contents=0;

# ---------------------------------------------- Go through table to get layout

	for ($i=0;$i<=$#rows;$i++) {
	    if ($rows[$i]) {
		$contents++;
		my @colcont=split(/\&/,$rows[$i]);
		$lcm*=($#colcont+1)/euclid($lcm,($#colcont+1));
	    } 
	}


	unless ($contents) {
	    $r->print('<html><body>Empty Map.</body></html>');
	} else {

# ------------------------------------------------------------------ Build page

	    my $currenturl=$ENV{'form.postdata'};
	    $currenturl=~s/^http\:\/\///;
	    $currenturl=~s/^[^\/]+//;

# ---------------------------------------------------------------- Send headers

	    my $date=localtime;
	    my $now=time;
# ----------------------------------------- Get email status and discussiontime

	    my %emailstatus=&Apache::lonnet::dump('email_status');
	    my $logouttime=$emailstatus{'logout'};
	    my $courseleave=$emailstatus{'logout_'.$ENV{'request.course.id'}};
	    my $lastcheck=($courseleave>$logouttime?$courseleave:$logouttime);

	    my %discussiontimes=&Apache::lonnet::dump('discussiontimes',
							  $cdom,$cnum);

	    my %feedback=();
	    my %error=();
	    foreach my $msgid (split(/\&/,&Apache::lonnet::reply('keys:'.
								 $ENV{'user.domain'}.':'.
								 $ENV{'user.name'}.':nohist_email',
								 $ENV{'user.home'}))) {
		$msgid=&Apache::lonnet::unescape($msgid);
		my $plain=&Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));
		if ($plain=~/(Error|Feedback) \[([^\]]+)\]/) {
		    my ($what,$url)=($1,$2);
		    my %status=
			&Apache::lonnet::get('email_status',[$msgid]);
		    if ($status{$msgid}=~/^error\:/) { 
			$status{$msgid}=''; 
		    }
			
		    if (($status{$msgid} eq 'new') || 
			(!$status{$msgid})) { 
			if ($what eq 'Error') {
			    $error{$url}.=','.$msgid; 
			} else {
			    $feedback{$url}.=','.$msgid;
			}
		    }
		}
	    }
# ----------------------------------------------------------- Start Page Output
	    $r->print('<html><head><title>Navigate LON-CAPA Maps</title></head>');
	    $r->print('<body bgcolor="#FFFFFF"');
	    if (($currenturl=~/^\/res/) &&
		($currenturl!~/^\/res\/adm/)) {
		$r->print(' onLoad="window.location.hash='."'curloc'".'"');
	    }
	    $r->print('><script>window.focus();</script>'.
		      '<img align=right src=/adm/lonIcons/lonlogos.gif>'.
		      '<h1>Navigate Course Map</h1>'.
		      "<h3>$date</h3>");
	    $r->rflush();
	    $r->print('<img src="/adm/lonMisc/chat.gif"> New discussion since '.
		      localtime($lastcheck).
		      '<br><img src="/adm/lonMisc/feedback.gif"> New message (click to open)<p>'); 
	    if (($currenturl=~/^\/res/) &&
		($currenturl!~/^\/res\/adm/)) {
		$r->print('<a href="#curloc">Current Location</a><p>');
	    }
# ----------------------------------------------------- The little content list
	    for ($i=0;$i<=$#rows;$i++) {
		if ($rows[$i]) {
		    my @colcont=split(/\&/,$rows[$i]);
		    my $avespan=$lcm/($#colcont+1);
		    for ($j=0;$j<=$#colcont;$j++) {
			my $rid=$colcont[$j];
			if ($rid=~/^h(.+)/) {
			    $rid=$1;
			    $r->print('&nbsp;&nbsp;&nbsp;<a href="#'.
				      $rid.'">'.$hash{'title_'.$rid}.
				      '</a><br>');
			}
		    }
		}
	    }
# ----------------------------------------------------------------- Start table
	    $r->print('<hr><table cols="'.$lcm.'" border="0">');
	    for ($i=0;$i<=$#rows;$i++) {
		if ($rows[$i]) {
		    $r->print("\n<tr>");
		    my @colcont=split(/\&/,$rows[$i]);
		    my $avespan=$lcm/($#colcont+1);
		    for ($j=0;$j<=$#colcont;$j++) {
			my $rid=$colcont[$j];
			my $add='<td>&nbsp;&nbsp;';
			my $adde='</td>';
			my $hwk='<font color="#223322">';
			my $hwke='</font>';
			if ($rid=~/^h(.+)/) {
			    $rid=$1;
			    $add='<th bgcolor="#AAFF55"><a name="'.$rid.'">';
			    $adde='</th>';
			}
			if ($rid=~/^p(\d)(\d)\"([\w\: \(\)\/\,]*)\"(.+)/) {
			    # sub astatus describes what code/tcode mean
			    my $code=$1;
			    my $tcode=$2;
			    my $ctext=$3;
			    $rid=$4;
			    if ($tcode eq '1') {
				$add='<td bgcolor="#AAAAAA">';
			    }
			    if ($code eq '3') {
				$add='<td bgcolor="#AAFFAA">';
			    } else {
				$add='<td bgcolor="#FFAAAA">';
				if ($tcode eq '2') {
				    $add='<td bgcolor="#FFFFAA">';
				}
				if ($tcode eq '4') {
				    $add='<td bgcolor="#FFFF33">';
				    $adde='</td>';
				}
			    }
			    $hwk='<font color="#888811"><b>';
			    $hwke='</b></font>';
			    if ($code eq '1') {
				$hwke='</b> ('.$ctext.')</font>';
			    }
			    if ($code eq '2') {
				$hwk='<font color="#992222"><b>';
				$hwke='</b> ('.$ctext.')</font>';
			    }
			    if ($code eq '3') {
				$hwk='<font color="#229922"><b>';
				$hwke='</b> ('.$ctext.')</font>';
			    }
			}
			if ($hash{'src_'.$rid} eq $currenturl) {
			    $add=$add.'<a name="curloc"></a>'.
				'<font color=red size=+2><b>&gt; </b></font>';
			    $adde=
				'<font color=red size=+2><b> &lt;</b></font>'.$adde;
			}
			my $src=
			    &Apache::lonnet::declutter($hash{'src_'.$rid});
			$rid=~/^(\d+)\.(\d+)$/;
			my $symb=
			    &Apache::lonnet::declutter($hash{'map_id_'.$1}).'___'.$2.'___'.$src;
			if ($discussiontimes{$symb}>$lastcheck) {
			    $adde=
				'<img border=0 src="/adm/lonMisc/chat.gif">'.
				    $adde;
			}
			if ($error{$src}) {
			    foreach (split(/\,/,$error{$src})) {
				if ($_) {
				    $adde=
					'&nbsp;<a href="/adm/email?display='.
					    &Apache::lonnet::escape($_).
						'"><img src="/adm/lonMisc/bomb.gif" border=0></a>'
						    .$adde;
				}
			    }
			}
			if ($feedback{$src}) {
			    foreach (split(/\,/,$feedback{$src})) {
				if ($_) {
				    $adde=
					'&nbsp;<a href="/adm/email?display='.
					    &Apache::lonnet::escape($_).
						'"><img src="/adm/lonMisc/feedback.gif" border=0></a>'
						    .$adde;
				}
			    }
			}
			$r->print($add.'<a href="'.$hash{'src_'.$rid}.
				  '">'.$hwk.
				  $hash{'title_'.$rid}.$hwke.'</a>'.$adde);
		    }
		    $r->print('</tr>');
		}
	    }
	    $r->print("\n</table>");
	    $r->print('</body></html>');
# -------------------------------------------------------------------- End page
	}                  
# ------------------------------------------------------------- End render page
    }
# ------------------------------------------------------------------ Untie hash
    unless (untie(%hash)) {
	&Apache::lonnet::logthis("<font color=blue>WARNING: ".
				 "Could not untie coursemap $fn (browse).</font>"); 
    }
    unless (untie(%parmhash)) {
	&Apache::lonnet::logthis("<font color=blue>WARNING: ".
				 "Could not untie parmhash (browse).</font>"); 
    }
    return OK;
}

1;
__END__
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
500 Internal Server Error

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at root@localhost to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.