# The LearningOnline Network with CAPA
#
# Metadata display handler
#
# (TeX Content Handler
#
# 05/29/00,05/30,10/11 Gerd Kortemeyer)
#
# 10/19,10/21,10/23 Gerd Kortemeyer
package Apache::lonmeta;
use strict;
use Apache::File;
use Apache::Constants qw(:common);
use HTML::TokeParser;
# ================================================= Unpack metadata into a hash
sub unpackagemeta {
my ($datastring,$fordisplay)=@_;
my %content=();
my $parser=HTML::TokeParser->new(\$datastring);
my $token;
while ($token=$parser->get_token) {
if ($token->[0] eq 'S') {
my $entry=$token->[1];
my $value=$parser->get_text('/'.$entry);
if (($token->[2]->{'display'}) && ($fordisplay)) {
$value.='__dis__'.$token->[2]->{'display'};
}
$content{$entry}=$value;
}
}
return %content;
}
# ================================================================ Main Handler
sub handler {
my $r=shift;
my @metacontents;
my %content;
# ----------------------------------------------------------- Set document type
$r->content_type('text/html');
$r->send_http_header;
return OK if $r->header_only;
# ------------------------------------------------------------------- Read file
{
my $fh=Apache::File->new($r->filename);
@metacontents=<$fh>;
}
%content=&unpackagemeta(join("\n",@metacontents),1);
# --------------------------------------------------------------- Render Output
my $creationdate=localtime($content{'creationdate'});
my $lastrevisiondate=localtime($content{'lastrevisiondate'});
$r->print(<<ENDHEAD);
<html><head><title>Catalog Information</title></head>
<body bgcolor="#FFFFFF">
<h1>Catalog Information</h1>
<h2>$content{'title'}</h2>
<h3>Author(s): $content{'author'}</h3>
<b>Subject:</b> $content{'subject'}<br>
<b>Keyword(s):</b> $content{'keywords'}<br>
<b>Notes:</b> $content{'notes'}<br>
<b>Abstract:</b>
<blockquote>$content{'abstract'}</blockquote>
<hr>
<b>MIME Type:</b> $content{'mime'}<br>
<b>Language:</b> $content{'language'}<br>
<b>Creation Date:</b> $creationdate<br>
<b>Last Revision Date:</b> $lastrevisiondate<br>
<b>Publisher/Owner:</b> $content{'owner'}<br>
<b>Copyright/Distribution:</b> $content{'copyright'}
<hr>
ENDHEAD
delete($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($content{'copyright'});
map {
my ($value,$name)=split(/\_\_dis\_\_/,$content{$_});
unless ($name) { $name=$_; }
$r->print('<b>'.$name.':</b> '.$value.'<br>');
} sort keys %content;
$r->print('</body></html>');
return OK;
}
1;
__END__
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