#!/usr/bin/perl

# Copyright 2000-2002 Katipo Communications
#
# This file is part of Koha.
#
# Koha 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 3 of the License, or
# (at your option) any later version.
#
# Koha 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 Koha; if not, see <http://www.gnu.org/licenses>.


=head1 opac-tags_subject.pl

TODO :: Description here

=cut

use Modern::Perl;

use C4::Auth qw( get_template_and_user );
use C4::Context;
use C4::Output qw( output_html_with_http_headers );
use CGI qw ( -utf8 );

my $query = CGI->new;

my $dbh = C4::Context->dbh;

# open template
my ( $template, $loggedinuser, $cookie ) = get_template_and_user(
    {
        template_name   => "opac-tags_subject.tt",
        query           => $query,
        type            => "opac",
        authnotrequired => ( C4::Context->preference("OpacPublic") ? 1 : 0 ),
    }
);

my $number = $query->param('number') || 100;

my $sth = $dbh->prepare("SELECT entry,weight FROM tags ORDER BY weight DESC LIMIT ?");
$sth->execute($number);

my %result;
my $max=0;
my $min=9999;
my ($entry,$weight);
while (($entry,$weight) = $sth->fetchrow) {
    $result{$entry}=$weight;
    $max = $weight if $weight > $max;
    $min = $weight if $weight < $min;
}

$min++ if $min == $max;

my @loop;
foreach my $entry (sort keys %result) {
    my %line;
    $line{entry} = $entry;
    $line{weight} = int(($result{$entry}-$min)/($max-$min)*25)+10;
    push @loop, \%line;
}
$template->param(
    LOOP => \@loop,
    number => $number
);

output_html_with_http_headers $query, $cookie, $template->output;