# The LearningOnline Network with CAPA
# Metadata display handler
#
# $Id: lonmeta.pm,v 1.11 2001/12/24 21:09:08 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/
#
# (TeX Content Handler
#
# 05/29/00,05/30,10/11 Gerd Kortemeyer)
#
# 10/19,10/21,10/23,11/27,08/09/01,12/22,12/24 Gerd Kortemeyer
package Apache::lonmeta;
use strict;
use Apache::Constants qw(:common);
use Apache::lonnet();
use Apache::loncommon();
# ----------------------------------------- Fetch and evaluate dynamic metadata
sub dynamicmeta {
my $url=&Apache::lonnet::declutter(shift);
$url=~s/\.meta$//;
my ($adomain,$aauthor)=($url=~/^(\w+)\/(\w+)\//);
my $regexp=&Apache::lonnet::escape($url);
$regexp=~s/(\W)/\\$1/g;
$regexp='___'.$regexp.'___';
my %evaldata=&Apache::lonnet::dump
('resevaldata',$adomain,$aauthor,$regexp);
my %sum;
my %cnt;
my %listitems=('count' => 'add',
'course' => 'add',
'avetries' => 'avg',
'stdno' => 'add',
'difficulty' => 'avg',
'clear' => 'avg',
'technical' => 'avg',
'helpful' => 'avg',
'correct' => 'avg',
'depth' => 'avg',
'comments' => 'app',
'usage' => 'cnt'
);
foreach (keys %evaldata) {
$_=~/___(\w+)$/;
if (defined($cnt{$1})) { $cnt{$1}++; } else { $cnt{$1}=1; }
unless ($listitems{$1} eq 'app') {
if (defined($sum{$1})) {
$sum{$1}+=$evaldata{$_};
} else {
$sum{$1}=$evaldata{$_};
}
} else {
if (defined($sum{$1})) {
if ($evaldata{$_}) {
$sum{$1}.='<hr>'.$evaldata{$_};
}
} else {
$sum{$1}=''.$evaldata{$_};
}
}
}
my %returnhash=();
foreach (keys %cnt) {
if ($listitems{$_} eq 'avg') {
$returnhash{$_}=int(($sum{$_}/$cnt{$_})*100.0+0.5)/100.0;
} elsif ($listitems{$_} eq 'cnt') {
$returnhash{$_}=$cnt{$_};
} else {
$returnhash{$_}=$sum{$_};
}
}
return %returnhash;
}
# ================================================================ Main Handler
sub handler {
my $r=shift;
my %content=();
# ----------------------------------------------------------- Set document type
$r->content_type('text/html');
$r->send_http_header;
return OK if $r->header_only;
# ------------------------------------------------------------------- Read file
my $uri=$r->uri;
map {
$content{$_}=&Apache::lonnet::metadata($uri,$_);
} split(/\,/,&Apache::lonnet::metadata($uri,'keys'));
# ------------------------------------------------------------------ Hide stuff
unless ($ENV{'user.adv'}) {
map {
$content{$_}='<i>- not displayed -</i>';
} ('keywords','notes','abstract','subject');
}
# --------------------------------------------------------------- Render Output
my $creationdate=localtime($content{'creationdate'});
my $lastrevisiondate=localtime($content{'lastrevisiondate'});
my $language=&Apache::loncommon::languagedescription($content{'language'});
my $mime=&Apache::loncommon::filedescription($content{'mime'});
my $disuri=&Apache::lonnet::declutter($uri);
$disuri=~s/\.meta$//;
$r->print(<<ENDHEAD);
<html><head><title>Catalog Information</title></head>
<body bgcolor="#FFFFFF">
<h1>Catalog Information</h1>
<h2>$content{'title'}</h2>
<h3><tt>$disuri</tt></h3>
<table cellspacing=2 border=0>
<tr><td bgcolor='#AAAAAA'>Author(s)</td>
<td bgcolor="#CCCCCC">$content{'author'} </td></tr>
<tr><td bgcolor='#AAAAAA'>Subject</td>
<td bgcolor="#CCCCCC">$content{'subject'} </td></tr>
<tr><td bgcolor='#AAAAAA'>Keyword(s)</td>
<td bgcolor="#CCCCCC">$content{'keywords'} </td></tr>
<tr><td bgcolor='#AAAAAA'>Notes</td>
<td bgcolor="#CCCCCC">$content{'notes'} </td></tr>
<tr><td bgcolor='#AAAAAA'>Abstract</td>
<td bgcolor="#CCCCCC">$content{'abstract'} </td></tr>
<tr><td bgcolor='#AAAAAA'>MIME Type</td>
<td bgcolor="#CCCCCC">$mime ($content{'mime'}) </td></tr>
<tr><td bgcolor='#AAAAAA'>Language</td>
<td bgcolor="#CCCCCC">$language </td></tr>
<tr><td bgcolor='#AAAAAA'>Creation Date</td>
<td bgcolor="#CCCCCC">$creationdate </td></tr>
<tr><td bgcolor='#AAAAAA'>
Last Revision Date</td><td bgcolor="#CCCCCC">$lastrevisiondate </td></tr>
<tr><td bgcolor='#AAAAAA'>Publisher/Owner</td>
<td bgcolor="#CCCCCC">$content{'owner'} </td></tr>
<tr><td bgcolor='#AAAAAA'>Copyright/Distribution</td>
<td bgcolor="#CCCCCC">$content{'copyright'}
</table>
ENDHEAD
delete($content{'title'});
delete($content{'author'});
delete($content{'subject'});
delete($content{'keywords'});
delete($content{'notes'});
delete($content{'abstract'});
delete($content{'mime'});
delete($content{'language'});
delete($content{'creationdate'});
delete($content{'lastrevisiondate'});
delete($content{'owner'});
delete($content{'copyright'});
if ($ENV{'user.adv'}) {
# ------------------------------------------------------------ Dynamic Metadata
$r->print('<h3>Dynamic Metadata (updated periodically)</h3>');
my %items=(
'count' => 'Network-wide number of accesses (hits)',
'course' => 'Network-wide number of courses using resource',
'usage' => 'Number of resources using or importing resource',
'clear' => 'Material presented in clear way',
'depth' => 'Material covered with sufficient depth',
'helpful' => 'Material is helpful',
'correct' => 'Material appears to be correct',
'technical' => 'Resource is technically correct',
'avetries' => 'Average number of tries till solved',
'stdno' => 'Total number of students who have worked on this problem',
'difficulty' => 'Degree of difficulty');
my %dynmeta=&dynamicmeta($uri);
$r->print(
'</table><h4>Access and Usage Statistics</h4><table cellspacing=2 border=0>');
foreach ('count','usage','course') {
$r->print(
'<tr><td bgcolor="#AAAAAA">'.$items{$_}.'</td><td bgcolor="#CCCCCC">'.
$dynmeta{$_}." </td></tr>\n");
}
$r->print('</table>');
if ($uri=~/\.(problem|exam|quiz|assess|survey|form)\.meta$/) {
$r->print(
'<h4>Assessment Statistical Data</h4><table cellspacing=2 border=0>');
foreach ('stdno','avetries','difficulty') {
$r->print(
'<tr><td bgcolor="#AAAAAA">'.$items{$_}.'</td><td bgcolor="#CCCCCC">'.
$dynmeta{$_}." </td></tr>\n");
}
$r->print('</table>');
}
$r->print('<h4>Evaluation Data</h4><table cellspacing=2 border=0>');
foreach ('clear','depth','helpful','correct','technical') {
$r->print(
'<tr><td bgcolor="#AAAAAA">'.$items{$_}.'</td><td bgcolor="#CCCCCC">'.
$dynmeta{$_}." </td></tr>\n");
}
$r->print('</table>');
$disuri=~/^(\w+)\/(\w+)\//;
if ((($ENV{'user.domain'} eq $1) && ($ENV{'user.name'} eq $2))
|| ($ENV{'user.role.ca./'.$1.'/'.$2})) {
$r->print(
'<h4>Evaluation Comments (visible to author and co-authors only)</h4>'.
'<blockquote>'.$dynmeta{'comments'}.'</blockquote>');
}
# ------------------------------------------------------------- All other stuff
$r->print(
'<h3>Additional Metadata (non-standard, parameters, exports)</h3>');
foreach (sort keys %content) {
my $name=$_;
my $display=&Apache::lonnet::metadata($uri,$name.'.display');
unless ($display) { $display=$name; };
my $otherinfo='';
map {
if (defined(&Apache::lonnet::metadata($uri,$name.'.'.$_))) {
$otherinfo.=' '.$_.'='.
&Apache::lonnet::metadata($uri,$name.'.'.$_).'; ';
}
} ('name','part','type','default');
$r->print('<b>'.$display.':</b> '.$content{$name});
if ($otherinfo) {
$r->print(' ('.$otherinfo.')');
}
$r->print("<br>\n");
}
}
$r->print('</body></html>');
return OK;
}
1;
__END__
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