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//;
use File::Slurp qw//;
use Storable qw//;
use Carp qw/croak carp/;

=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 ) = @_;
        $self->mkbasepath( $filename );
        if ( $filename =~ m{\.ya?ml$}i ) {
                YAML::DumpFile( $filename, $data );
        } elsif ( $filename =~ m{\.sto?r?a?b?l?e?$} ) {
                Storable::store $data => $filename;
        } else {
                croak "without extension we can save only scalar data" if ref($data);
                File::Slurp::write_file( $filename, $data );
        }
        carp "created $filename ", -s $filename;
}

=head2 load

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

=cut

sub load {
        my ( $self, $filename ) = @_;
        return if ! -e $filename;
        my $data;
        if ( $filename =~ m{\.ya?ml}i ) {
                $data = YAML::LoadFile( $filename );
        } elsif ( $filename =~ m{\.stor?a?b?l?e?$} ) {
                $data = Storable::retrieve $filename;
        } else {
                $data = File::Slurp::read_file( $filename );
        }
        $self->storage_timestamp->{ $filename } = _path_time( $filename );
        return $data;
}

=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 ) = @_;
        return if defined $self->storage_timestamp->{ $filename } && $self->storage_timestamp->{ $filename } == _path_time( $filename );
        warn "# reload $filename" if $self->debug;
        $self->load( $filename );
}

no Moose::Role;

1;
1	dpavlin	151	package Frey::Storage;
2			use Moose::Role;
3
4	dpavlin	224	with 'Frey::Path';
5
6	dpavlin	153	#use YAML::Syck; # XXX doesn't play nice with Continuity
7	dpavlin	1189	use YAML qw//;
8			use File::Slurp qw//;
9			use Storable qw//;
10	dpavlin	301	use Carp qw/croak carp/;
11	dpavlin	151
12			=head2 store
13
14			$o->store( 'filename.yml', $data );
15
16			=cut
17
18			has 'storage_timestamp' => (
19			is => 'rw',
20			isa => 'HashRef[Int]',
21			default => sub { {} },
22			);
23
24			sub store {
25			my $self = shift;
26			my ( $filename, $data ) = @_;
27	dpavlin	539	$self->mkbasepath( $filename );
28	dpavlin	301	if ( $filename =~ m{\.ya?ml$}i ) {
29	dpavlin	1189	YAML::DumpFile( $filename, $data );
30			} elsif ( $filename =~ m{\.sto?r?a?b?l?e?$} ) {
31			Storable::store $data => $filename;
32	dpavlin	301	} else {
33			croak "without extension we can save only scalar data" if ref($data);
34	dpavlin	1189	File::Slurp::write_file( $filename, $data );
35	dpavlin	301	}
36			carp "created $filename ", -s $filename;
37	dpavlin	151	}
38
39			=head2 load
40
41			$data = $o->load( 'filename.yml' );
42
43			=cut
44
45			sub load {
46			my ( $self, $filename ) = @_;
47	dpavlin	153	return if ! -e $filename;
48	dpavlin	301	my $data;
49			if ( $filename =~ m{\.ya?ml}i ) {
50	dpavlin	1189	$data = YAML::LoadFile( $filename );
51			} elsif ( $filename =~ m{\.stor?a?b?l?e?$} ) {
52			$data = Storable::retrieve $filename;
53	dpavlin	301	} else {
54	dpavlin	1189	$data = File::Slurp::read_file( $filename );
55	dpavlin	301	}
56	dpavlin	151	$self->storage_timestamp->{ $filename } = _path_time( $filename );
57	dpavlin	301	return $data;
58	dpavlin	151	}
59
60			=head2 reload
61
62			Reload file if on-disk copy have changed
63
64	dpavlin	153	my $new_data = $o->reload( 'filename.yml' );
65	dpavlin	151
66			=cut
67
68			sub _path_time {
69			(stat( $_[0] ))[9]; # mtime
70			}
71
72			sub reload {
73	dpavlin	153	my ( $self, $filename ) = @_;
74	dpavlin	301	return if defined $self->storage_timestamp->{ $filename } && $self->storage_timestamp->{ $filename } == _path_time( $filename );
75	dpavlin	151	warn "# reload $filename" if $self->debug;
76	dpavlin	153	$self->load( $filename );
77	dpavlin	151	}
78	dpavlin	153
79	dpavlin	1133	no Moose::Role;
80
81	dpavlin	151	1;