#!/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-browser.pl

TODO :: Description here

=cut

use Modern::Perl;

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

my $query = CGI->new;

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

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

# the level of browser to display
my $level = $query->param('level') || 0;
my $filter = $query->param('filter');
$filter = '' unless defined $filter;
$level++; # the level passed is the level of the PREVIOUS list, not the current one. Thus the ++

# build this level loop
my $sth = $dbh->prepare("SELECT * FROM browser WHERE level=? and classification like ? ORDER BY classification");
$sth->execute($level,$filter."%");
my @level_loop;
my $i=0;
while (my $line = $sth->fetchrow_hashref) {
    $line->{description} =~ s/\((.*)\)//g;
    push @level_loop,$line;
}

my $have_hierarchy = 0;

# now rebuild hierarchy loop
$filter =~ s/\.//g;
my @hierarchy_loop;
if ($filter eq '' and $level == 1) {
    # we're starting from the top
    $have_hierarchy = 1 if @level_loop;
    unless (@level_loop) {
        $sth->execute(1, "%");
        while (my $line = $sth->fetchrow_hashref) {
            $line->{description} =~ s/\((.*)\)//g;
            push @level_loop,$line;
        }
    }
} else {
    $sth = $dbh->prepare("SELECT * FROM browser where classification=?");
    for (my $i=1;$i <=length($filter);$i++) {
        $sth->execute(substr($filter,0,$i));
        my $line = $sth->fetchrow_hashref;
        push @hierarchy_loop,$line;
    }
    $have_hierarchy = 1 if @hierarchy_loop;
}

# mark every third entry in level_loop
for (my $i = 0; $i <= $#level_loop; $i++) {
    $level_loop[$i]->{count3} = 1 if 2 == $i % 3 && $i != $#level_loop;
}

$template->param(
    LEVEL_LOOP => \@level_loop,
    HIERARCHY_LOOP => \@hierarchy_loop,
    have_hierarchy => $have_hierarchy,
);

output_html_with_http_headers $query, $cookie, $template->output, undef, { force_no_caching => 1 };