# $Id$
# List of projects Perl template.
# Copyright (C) 2003-2005 Jan Kratochvil <project-www.jankratochvil.net@jankratochvil.net>
# 
# This program 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; exactly version 2 of June 1991 is required
# 
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


package project::Rel;
require 5.6.0;	# at least 'use warnings;' but we need some 5.6.0+ modules anyway
our $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
our $CVS_ID=q$Id$;
use strict;
use warnings;

use My::Web;
use Apache2::Const qw(HTTP_MOVED_PERMANENTLY);
Wrequire 'project::Lib';


our $HTML_TEST="download";
our $HTML_TEST_RC=HTTP_MOVED_PERMANENTLY;
our $HTML_TEST_QUERY_STRING='project=MyWeb&rel=next';

sub handler
{
my $W=My::Web->init(
		"args_check"=>{
				"rel"=>'^(?:prev|next)$',
				"project"=>'^\w+$',
				},
		"header_only"=>1,
		);


my %item=project::Lib->name_to_hashref();
my @platforms=@project::Lib::platforms;
my @projects=();
# Do not sort by platforms:
# while (@platforms)
{
	my $platform_sym =shift @platforms;
	my $platform_name=shift @platforms;
	push @projects,sort {
			($item{$b}{"priority"} <=> $item{$a}{"priority"})
			or
			(lc($item{$a}{"name"}) cmp lc($item{$b}{"name"}));
			}
					( # Do not sort by platform: map({ $item{$_}{"platform"} ne $platform_sym ? () : ($_); }	# )
					keys(%item)
					);
	}
my $target=undef();
for (0..$#projects) {
	next if $projects[$_] ne $W->{"args"}{"project"};
	$target=$projects[$_-1] if $_>0          && $W->{"args"}{"rel"} eq "prev";
	$target=$projects[$_+1] if $_<$#projects && $W->{"args"}{"rel"} eq "next";
	last if $target;
	}

My::Web->http_moved("./".(!$target ? "" : "$target/"),HTTP_MOVED_PERMANENTLY);
}
1;