# The LearningOnline Network with CAPA
# Metadata display handler
#
# $Id: lonmeta.pm,v 1.31 2003/04/15 00:53:04 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)
#
# 10/19,10/21,10/23,11/27,08/09/01,12/22,12/24,12/25 Gerd Kortemeyer
package Apache::lonmeta;
use strict;
use Apache::Constants qw(:common);
use Apache::lonnet();
use Apache::loncommon();
use Apache::lonmsg;
use Apache::lonpublisher;
# ----------------------------------------- Fetch and evaluate dynamic metadata
sub dynamicmeta {
my $url=&Apache::lonnet::declutter(shift);
$url=~s/\.meta$//;
my ($adomain,$aauthor)=($url=~/^(\w+)\/(\w+)\//);
my $regexp=$url;
$regexp=~s/(\W)/\\$1/g;
$regexp='___'.$regexp.'___';
my %evaldata=&Apache::lonnet::dump('nohist_resevaldata',$adomain,
$aauthor,$regexp);
my %sum=();
my %cnt=();
my %concat=();
my %listitems=('count' => 'add',
'course' => 'add',
'goto' => 'add',
'comefrom' => 'add',
'avetries' => 'avg',
'stdno' => 'add',
'difficulty' => 'avg',
'clear' => 'avg',
'technical' => 'avg',
'helpful' => 'avg',
'correct' => 'avg',
'depth' => 'avg',
'comments' => 'app',
'usage' => 'cnt'
);
foreach (keys %evaldata) {
my ($item,$purl,$cat)=split(/\_\_\_/,$_);
### print "\n".$_.' - '.$item.'
';
if (defined($cnt{$cat})) { $cnt{$cat}++; } else { $cnt{$cat}=1; }
unless ($listitems{$cat} eq 'app') {
if (defined($sum{$cat})) {
$sum{$cat}+=$evaldata{$_};
$concat{$cat}.=','.$item;
} else {
$sum{$cat}=$evaldata{$_};
$concat{$cat}=$item;
}
} else {
if (defined($sum{$cat})) {
if ($evaldata{$_}) {
$sum{$cat}.='
'.$evaldata{$_};
}
} else {
$sum{$cat}=''.$evaldata{$_};
}
}
}
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 {
$returnhash{$_}=$sum{$_};
}
$returnhash{$_.'_list'}=$concat{$_};
### print "\n
".$_.': '.$returnhash{$_}.'
'.$returnhash{$_.'_list'};
}
return %returnhash;
}
# ------------------------------------- Try to make an alt tag if there is none
sub alttag {
my ($base,$src)=@_;
my $fullpath=&Apache::lonnet::hreflocation($base,$src);
my $alttag=&Apache::lonnet::metadata($fullpath,'title').' '.
&Apache::lonnet::metadata($fullpath,'subject').' '.
&Apache::lonnet::metadata($fullpath,'abstract');
$alttag=~s/\s+/ /gs;
$alttag=~s/\"//gs;
$alttag=~s/\'//gs;
$alttag=~s/\s+$//gs;
$alttag=~s/^\s+//gs;
if ($alttag) { return $alttag; } else
{ return 'No information available'; }
}
# -------------------------------------------------------------- Author display
sub authordisplay {
my ($aname,$adom)=@_;
return &Apache::loncommon::aboutmewrapper(
&Apache::loncommon::plainname($aname,$adom),
$aname,$adom).' ['.$aname.'@'.$adom.']';
}
# -------------------------------------------------------------- Pretty display
sub evalgraph {
my $value=shift;
unless ($value) { return ''; }
my $val=int($value*10.+0.5)-10;
my $output='';
if ($val>=20) {
$output.='  | ';
} else {
$output.=' | '.
' | ';
}
$output.=' | ';
if ($val>20) {
$output.=' | '.
' | ';
} else {
$output.='  | ';
}
$output.=' ('.$value.') |
';
return $output;
}
sub diffgraph {
my $value=shift;
unless ($value) { return ''; }
my $val=int(40.0*$value+0.5);
my @colors=('#FF9933','#EEAA33','#DDBB33','#CCCC33',
'#BBDD33','#CCCC33','#DDBB33','#EEAA33');
my $output='';
for (my $i=0;$i<8;$i++) {
if ($val>$i*5) {
$output.=' | ';
} else {
$output.=' | ';
}
}
$output.=' ('.$value.') |
';
return $output;
}
# ================================================================ Main Handler
sub handler {
my $r=shift;
my $loaderror=&Apache::lonnet::overloaderror($r);
if ($loaderror) { return $loaderror; }
my $uri=$r->uri;
unless ($uri=~/^\/\~/) {
# =========================================== This is not in construction space
my ($resdomain,$resuser)=
(&Apache::lonnet::declutter($uri)=~/^(\w+)\/(\w+)\//);
$loaderror=
&Apache::lonnet::overloaderror($r,
&Apache::lonnet::homeserver($resuser,$resdomain));
if ($loaderror) { return $loaderror; }
my %content=();
# ----------------------------------------------------------- Set document type
$r->content_type('text/html');
$r->send_http_header;
return OK if $r->header_only;
# ------------------------------------------------------------------- Read file
foreach (split(/\,/,&Apache::lonnet::metadata($uri,'keys'))) {
$content{$_}=&Apache::lonnet::metadata($uri,$_);
}
# ------------------------------------------------------------------ Hide stuff
unless ($ENV{'user.adv'}) {
foreach ('keywords','notes','abstract','subject') {
$content{$_}='- not displayed -';
}
}
# --------------------------------------------------------------- Render Output
my ($thisversion)=($uri=~/\.(\d+)\.(\w+)\.meta$/);
my $creationdate=localtime(
&Apache::loncommon::unsqltime($content{'creationdate'}));
my $lastrevisiondate=localtime(
&Apache::loncommon::unsqltime($content{'lastrevisiondate'}));
my $language=&Apache::loncommon::languagedescription($content{'language'});
my $mime=&Apache::loncommon::filedescription($content{'mime'});
my $disuri=&Apache::lonnet::declutter($uri);
$disuri=~s/\.meta$//;
my $currentversion=&Apache::lonnet::getversion($disuri);
my $author=$content{'author'};
$author=~s/(\w+)(\:|\@)(\w+)/&authordisplay($1,$3)/gse;
my $owner=$content{'owner'};
$owner=~s/(\w+)(\:|\@)(\w+)/&authordisplay($1,$3)/gse;
my $versiondisplay='';
if ($thisversion) {
$versiondisplay='Version: '.$thisversion.
' (most recent version: '.$currentversion.')';
} else {
$versiondisplay='Version: '.$currentversion;
}
my $customdistributionfile='';
if ($content{'customdistributionfile'}) {
$customdistributionfile=''.$content{'customdistributionfile'}.'';
}
my $bodytag=&Apache::loncommon::bodytag
('Catalog Information','','','',$resdomain);
$r->print(<Catalog Information
$bodytag
$content{'title'}
$disuri
$versiondisplay
Author(s) |
$author |
Subject |
$content{'subject'} |
Keyword(s) |
$content{'keywords'} |
Notes |
$content{'notes'} |
Abstract |
$content{'abstract'} |
MIME Type |
$mime ($content{'mime'}) |
Language |
$language |
Creation Date |
$creationdate |
Last Revision Date | $lastrevisiondate |
Publisher/Owner |
$owner |
Copyright/Distribution |
$content{'copyright'} |
Custom Distribution File |
$customdistributionfile |
ENDHEAD
delete($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(
'Dynamic Metadata (updated periodically)
Processing ...
');
$r->rflush();
my %items=(
'count' => 'Network-wide number of accesses (hits)',
'course' => 'Network-wide number of courses using resource',
'usage' => 'Number of resources using or importing resource',
'goto' => 'Number of resources that follow this resource in maps',
'comefrom' => 'Number of resources that lead up to this resource in maps',
'clear' => 'Material presented in clear way',
'depth' => 'Material covered with sufficient depth',
'helpful' => 'Material is helpful',
'correct' => 'Material appears to be correct',
'technical' => 'Resource is technically correct',
'avetries' => 'Average number of tries till solved',
'stdno' => 'Total number of students who have worked on this problem',
'difficulty' => 'Degree of difficulty');
my %dynmeta=&dynamicmeta($uri);
$r->print(
'Access and Usage Statistics
');
foreach ('count') {
$r->print(
''.$items{$_}.' | '.
$dynmeta{$_}." |
\n");
}
foreach my $cat ('usage','comefrom','goto') {
$r->print(
''.$items{$cat}.' | '.
$dynmeta{$cat}.' |
\n");
}
foreach my $cat ('course') {
$r->print(
''.$items{$cat}.' | '.
$dynmeta{$cat}.' |
\n");
}
$r->print('
');
if ($uri=~/\.(problem|exam|quiz|assess|survey|form)\.meta$/) {
$r->print(
'Assessment Statistical Data
');
foreach ('stdno','avetries') {
$r->print(
''.$items{$_}.' | '.
$dynmeta{$_}." |
\n");
}
foreach ('difficulty') {
$r->print(
''.$items{$_}.' | '.
&diffgraph($dynmeta{$_})." |
\n");
}
$r->print('
');
}
$r->print('Evaluation Data
');
foreach ('clear','depth','helpful','correct','technical') {
$r->print(
''.$items{$_}.' | '.
&evalgraph($dynmeta{$_})." |
\n");
}
$r->print('
');
$disuri=~/^(\w+)\/(\w+)\//;
if ((($ENV{'user.domain'} eq $1) && ($ENV{'user.name'} eq $2))
|| ($ENV{'user.role.ca./'.$1.'/'.$2})) {
$r->print(
'Evaluation Comments (visible to author and co-authors only)
'.
''.$dynmeta{'comments'}.'
');
$r->print(
'Error Messages (visible to author and co-authors only)
');
my %errormsgs=&Apache::lonnet::dump('nohist_res_msgs',$1,$2);
foreach (keys %errormsgs) {
if ($_=~/^\Q$disuri\E\_\d+$/) {
my %content=&Apache::lonmsg::unpackagemsg($errormsgs{$_});
$r->print(''.$content{'time'}.': '.$content{'message'}.
'
');
}
}
}
# ------------------------------------------------------------- All other stuff
$r->print(
'Additional Metadata (non-standard, parameters, exports)
');
foreach (sort keys %content) {
my $name=$_;
my $display=&Apache::lonnet::metadata($uri,$name.'.display');
unless ($display) { $display=$name; };
my $otherinfo='';
foreach ('name','part','type','default') {
if (defined(&Apache::lonnet::metadata($uri,$name.'.'.$_))) {
$otherinfo.=' '.$_.'='.
&Apache::lonnet::metadata($uri,$name.'.'.$_).'; ';
}
}
$r->print(''.$display.': '.$content{$name});
if ($otherinfo) {
$r->print(' ('.$otherinfo.')');
}
$r->print("
\n");
}
}
# ===================================================== End Resource Space Call
} else {
# ===================================================== Construction Space Call
# ----------------------------------------------------------- Set document type
$r->content_type('text/html');
$r->send_http_header;
return OK if $r->header_only;
# ---------------------------------------------------------------------- Header
my $bodytag=&Apache::loncommon::bodytag('Edit Catalog Information');
my $disuri=$uri;
my $fn=&Apache::lonnet::filelocation('',$uri);
$disuri=~s/^\/\~\w+//;
$disuri=~s/\.meta$//;
my $displayfile='Catalog Information for '.$disuri;
if ($disuri=~/\/default$/) {
my $dir=$disuri;
$dir=~s/default$//;
$displayfile='Default Cataloging Information for Directory '.$dir;
}
%Apache::lonpublisher::metadatafields=();
%Apache::lonpublisher::metadatakeys=();
&Apache::lonpublisher::metaeval(&Apache::lonnet::getfile($fn));
$r->print(<Edit Catalog Information
$bodytag
$displayfile