lib/Frey/Storage.pm

package Frey::Storage;
use Moose::Role;

with 'Frey::Path';

#use YAML::Syck; # XXX doesn't play nice with Continuity
use YAML qw/LoadFile DumpFile/;

=head2 store

  $o->store( 'filename.yml', $data );

=cut

has 'storage_timestamp' => (
        is => 'rw',
        isa => 'HashRef[Int]',
        default => sub { {} },
);

sub store {
        my $self = shift;
        my ( $filename, $data ) = @_;
        $filename .= '.yml';
        $self->mkbasepath( $filename );
        DumpFile( $filename, $data );
}

=head2 load

  $data = $o->load( 'filename.yml' );

=cut

sub load {
        my ( $self, $filename ) = @_;
        $filename .= '.yml';
        return if ! -e $filename;
        $self->storage_timestamp->{ $filename } = _path_time( $filename );
        LoadFile( $filename );
}

=head2 reload

Reload file if on-disk copy have changed

  my $new_data = $o->reload( 'filename.yml' );

=cut

sub _path_time {
        (stat( $_[0] ))[9]; # mtime
}

sub reload {
        my ( $self, $filename ) = @_;
        my $path = $filename . '.yml';
        return if defined $self->storage_timestamp->{ $path } && $self->storage_timestamp->{ $path } == _path_time( $path );
        warn "# reload $filename" if $self->debug;
        $self->load( $filename );
}

1;
1	package Frey::Storage;
2	use Moose::Role;
3
4	with 'Frey::Path';
5
6	#use YAML::Syck; # XXX doesn't play nice with Continuity
7	use YAML qw/LoadFile DumpFile/;
8
9	=head2 store
10
11	$o->store( 'filename.yml', $data );
12
13	=cut
14
15	has 'storage_timestamp' => (
16	is => 'rw',
17	isa => 'HashRef[Int]',
18	default => sub { {} },
19	);
20
21	sub store {
22	my $self = shift;
23	my ( $filename, $data ) = @_;
24	$filename .= '.yml';
25	$self->mkbasepath( $filename );
26	DumpFile( $filename, $data );
27	}
28
29	=head2 load
30
31	$data = $o->load( 'filename.yml' );
32
33	=cut
34
35	sub load {
36	my ( $self, $filename ) = @_;
37	$filename .= '.yml';
38	return if ! -e $filename;
39	$self->storage_timestamp->{ $filename } = _path_time( $filename );
40	LoadFile( $filename );
41	}
42
43	=head2 reload
44
45	Reload file if on-disk copy have changed
46
47	my $new_data = $o->reload( 'filename.yml' );
48
49	=cut
50
51	sub _path_time {
52	(stat( $_[0] ))[9]; # mtime
53	}
54
55	sub reload {
56	my ( $self, $filename ) = @_;
57	my $path = $filename . '.yml';
58	return if defined $self->storage_timestamp->{ $path } && $self->storage_timestamp->{ $path } == _path_time( $path );
59	warn "# reload $filename" if $self->debug;
60	$self->load( $filename );
61	}
62
63	1;