===================================================================
RCS file: /cvs/openbsd/OpenBSDTorrents/lib/BT/MetaInfo/Cached.pm,v
retrieving revision 1.1
retrieving revision 1.13
diff -u -r1.1 -r1.13
--- openbsd/OpenBSDTorrents/lib/BT/MetaInfo/Cached.pm	2005/05/02 20:37:28	1.1
+++ openbsd/OpenBSDTorrents/lib/BT/MetaInfo/Cached.pm	2009/12/16 20:11:13	1.13
@@ -1,20 +1,105 @@
-package BT::OBTMetaInfo;
-
-require 5.6.0;
+# $RedRiver: Cached.pm,v 1.12 2006/05/15 18:47:04 andrew Exp $
 use strict;
 
+package BT::MetaInfo::Cached;
+
+require 5.0060;
+use vars qw( $VERSION @ISA );
+
+use Cache::FileCache;
+use File::Basename;
+use Digest::MD5;
+
 use BT::MetaInfo;
+use base 'BT::MetaInfo';
 
-$VERSION = do { my @r = (q$Revision: 1.1 $ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r };
+$VERSION = do { my @r = (q$Id: Cached.pm,v 1.13 2009/12/16 20:11:13 andrew Exp $ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r };
 
 sub new
 {
-	my $classname	= shift;
-	my $pass = shift;
+	my $class = shift;
+        my $file  = shift;
+	my $cache_settings = shift;
 
-	my $self	= $classname->SUPER::new(@_);
-}	
+	if (ref $file eq 'HASH') {
+		$cache_settings = $file;
+		$file = undef;
+	}
 
+	$cache_settings->{namespace}           ||= 'BT::MetaInfo::Cached';
+	$cache_settings->{default_expires_in}  ||=  7 * 24 * 60 * 60;
+	$cache_settings->{auto_purge_interval} ||=  1 *  1 * 10 * 60;
 
-sub info_hash { return(sha1(bencode($_[0]->info))); }
+	my $cache = new Cache::FileCache( $cache_settings );
 
+	my $obj = (defined($file)) ? _load($file, $cache) : {};
+
+	bless($obj, $class);
+
+	$obj->{cache} = $cache;
+
+        return $obj;
+}
+
+sub _load {
+	my $file = shift;
+	my $cache = shift;
+
+	my $basename = basename($file);
+	
+	my $info = $cache->get( $basename );
+
+	my $md5;
+	if (defined $info && $info->{'md5'}) {
+		my $old_md5 = delete $info->{'md5'};
+		my $cur_md5 = _MD5_file($file);
+		if ($old_md5 ne $cur_md5) {
+			$cache->remove( $basename );
+			$info = undef;
+		}
+		$md5 = $cur_md5;
+	}
+
+	unless (defined $info) {
+		$info = BT::MetaInfo::_load($file);
+		$info->{'md5'} = $md5;
+		$cache->set( $basename, $info );
+		delete $info->{'md5'};
+	}
+
+	return $info;
+}
+
+
+sub save
+{
+	my $self = shift;
+	my $file = shift;
+	my $basename = basename($file);
+
+	my $cache   = delete $self->{'cache'};
+
+	if ( $self->SUPER::save($file, @_) ) {
+		my %info_hash = %$self; # unbless
+
+		$info_hash{'md5'} = _MD5_file($file);
+		$cache->set($basename, \%info_hash)
+	}
+
+	$self->{'cache'} = $cache;
+
+	return 1;
+}
+
+sub _MD5_file
+{
+	my $file = shift;
+
+	my $ctx = Digest::MD5->new;
+	open my $fh, $file or die "Couldn't open FILE '$file': $!";
+	binmode $fh;
+	$ctx->addfile($fh);
+	close $fh;
+
+	return $ctx->hexdigest;
+}