#!/usr/bin/perl

use Getopt::Long;

my $gfxmenu = '/boot/gfxmenu';

my %options = (
	       "lang=s" => \ (my $lang),
	       "update-theme" => \ (my $update_theme),
	       "update-gfxmenu" => \ (my $update_gfxmenu),
	       "quiet" => \ (my $quiet),
	      );

GetOptions(%options) && @ARGV == 0 && ($lang || $update_theme || $update_gfxmenu) or usage();

if ($update_gfxmenu) {
    $update_theme = 1;
    $lang ||= eval { get_lang() };
    sys('cp', '/usr/share/gfxboot/themes/Mageia/boot/message', $gfxmenu);
}

if (!-e $gfxmenu) {
    warn "$gfxmenu doesn't exist\n" if !$quiet;
    exit;
}

if ($lang) {
    set_lang($lang);
}
if ($update_theme) {
    set_theme();
}

sub usage {
    die "grub-gfxmenu [--quiet] [--lang <lang>] [--update-theme] [--update-gfxmenu]\n";
}

sub set_theme() {
    my $background_dir = '/usr/share/gfxboot/themes/current';

    #checking
    -f "$background_dir/back.jpg" or return;
    remove_file('back.jpg');
    sys("echo back.jpg | (cd $background_dir ; cpio -o --quiet -O $gfxmenu --append)");
}

sub remove_file {
    my ($file) = @_;
    sys("cpio-filter --in-place --exclude $file $gfxmenu");
}

sub get_lang() {
    require Archive::Cpio;
    
    my $cpio = Archive::Cpio->new;
    $cpio->read($gfxmenu);
    my $e = $cpio->get_file('lang') or return;
    my $lang = $e->{data};
    chomp $lang;
    $lang;
}

sub set_lang {
    my ($lang) = @_;

    require Archive::Cpio;
    
    my $cpio = Archive::Cpio->new;
    $cpio->read($gfxmenu);
    if (my $e = $cpio->get_file('lang')) {
	$e->{data} = "$lang\n";
    } else {
	$cpio->add_data('lang', "$lang\n");
    }
    $cpio->write($gfxmenu);
}

sub system_verbose { print join(' ', @_), "\n"; system(@_) }
sub sys { system(@_); $? and die }