#!/usr/bin/perl -w

use strict;
#use CGI qw(param);

my %packages;

my $pkgdir="spkg/unstable";
my $package_file = "Packages";

# get md5sum of a file
 
sub packages_load {
	my $thispkg = {};
	$thispkg->{depends} = [];

	open(PACKAGES, "$pkgdir/$package_file") 
			or die("Cant open packages file");

	while (<PACKAGES>) {
		chomp;

		if ($_ eq '' && $thispkg->{name}) {
			bless $thispkg;
			$packages{$thispkg->{name}} = $thispkg;
			$thispkg = {};
			$thispkg->{depends} = [];

		} elsif (/^\w+\:/) {
			my ($var, $val) = /^(\w+)\:\s*(.*)/;

			if ($var eq 'Package') {
				$thispkg->{name} = $val;
			} elsif ($var eq 'Filename') {
				$thispkg->{file} = $val;
			} elsif ($var eq 'Version') {
				$thispkg->{version} = $val;
			} elsif ($var eq 'MD5sum') {
				$thispkg->{md5} = $val;
			} elsif ($var eq 'Size') {
				$thispkg->{filesize} = $val;
			} elsif ($var eq 'Description') {
				if ($thispkg->{description}) {
					$thispkg->{longdesc} .= "$val\n";
				} else {
					$thispkg->{description} = $val;
				}
			} elsif ($var eq 'Depend') {
				my $deppkg = $packages{$val};
				my $depends = $thispkg->{depends};

				if (!$deppkg) {
					die "package not found: $val\n";
				}
				
				push @$depends, $deppkg;
			} else {
				die "Invalid field: $var\n";
			}
		}
	}

	if ($thispkg->{name}) {
		$packages{$thispkg->{name}} = $thispkg;
	}

	close(PACKAGES);
}

sub pkg_param {
	my ($desc, $name, $pkg) = @_;

	return if !$pkg->{$name};

	print "<b>$desc:</b> $pkg->{$name} <br>\n";
}

sub param {
	my ($var) = @_;
	return $ENV{$var};
}

packages_load;

if (param('pkg')) {
	my $pkg = $packages{param('pkg')};

	die "package not found" if !$pkg;

	print "<h2>$pkg->{name}</h2>\n";

	pkg_param('Version', 'version', $pkg);
	if ($pkg->{file}) {
		print "<b>File:</b> ";
		print "<a href=\"$pkgdir/$pkg->{file}\">$pkg->{file}</a>";
		print "<br>\n";
	}
	pkg_param('File Size', 'filesize', $pkg);
	pkg_param('File MD5SUM', 'md5', $pkg);
	pkg_param('Description', 'description', $pkg);

	print $pkg->{longdesc} if $pkg->{longdesc};

	my $depends = $pkg->{depends};

	if (scalar @$depends > 0) {
		print "<h3>Dependencies</h3>\n";
		print "<ul>\n";

		foreach (@$depends) {
			print "<li> ";
			print "<a href=\"$_->{name}.html\">";
			print "$_->{name}</a>\n";
		}
		print "</ul>\n";
	}

	print "<p> <a href=\"pkglist.html\">back</a>\n";
} else {
	print "<h2>Packages</h2>\n";

print "Version 2.0 of Revol is package based, using ";
print "<a href=\"../spkg.html\">spkg</a> to build filesystems automatically. ";
print "This is a list of packages currently available in the ";
print "<a href=\"../$pkgdir/\">repository</a>.";
	print "<ul>\n";
	foreach(sort(keys %packages)) {
		print "<li> ";
		print "<a href=\"$_.html\">$_</a>\n";
	}
	print "</ul>\n";
}