lib/Frey/Pipe.pm

package Frey::Pipe;
use Moose;

=head1 DESCRIPTION

Shell pipes for structured data

=head1 EXAMPLE

 Frey::Feed/data + uri=http://blog.rot13.org/index.xml | Frey::Dumper/markup

this will produce following code:

        Frey::Dumper->new( data =>
                Frey::Feed->new( uri => 'http://blog.rot13.org/index.xml' )->data
        )->markup

=cut

has pipe => (
        is => 'rw',
        required => 1,
        default => 'Frey::Feed/data+uri=http://blog.rot13.org/index.xml|Frey::Dumper/markup',
);

use Data::Dump qw/dump/;

sub markup {
        my ($self) = @_;

        my $out;
        my $pipe;

        foreach my $part ( split(/\|/, $self->pipe ) ) {
                warn "# part: '$part'";
                if ( $part =~ m{^([^/]+)/([^\+]+)(\+.*)?$} ) {
                        my ( $class, $method, $args ) = ( $1, $2, $3 );
                        my $params = $pipe;
                        if ( defined $args ) {
                                $args =~ s/^\+//;
                                warn "# class $class method $method args $args", $pipe ? " pipe args " . join(',',keys %$pipe) : '';
                                map {
                                        my ( $name, $value ) = ( $1, $2 ) if m{^([^=]+)=(.+)$};
                                        $params->{$name} = $value;
                                } split(/[\s\+]/, $args)
                        }
                        my $code = '$result = ' . $class . '->new' . dump( %$params ) . '->' . $method . '();';
                        warn "# pipe $part -> $code";
                        my $result;
                        eval $code;
                        die $@ if $@;
                        warn "# result ",ref( $result );
                        $out .= qq{<code>$part</code>} . dump( $result ) . '<hr>';
                        $pipe = { $method => $result };
                } else {
                        die "don't know what to do with '$part' from ",$self->pipe;
                }
        }

        return $out;
}

1;
1	package Frey::Pipe;
2	use Moose;
3
4	=head1 DESCRIPTION
5
6	Shell pipes for structured data
7
8	=head1 EXAMPLE
9
10	Frey::Feed/data + uri=http://blog.rot13.org/index.xml \| Frey::Dumper/markup
11
12	this will produce following code:
13
14	Frey::Dumper->new( data =>
15	Frey::Feed->new( uri => 'http://blog.rot13.org/index.xml' )->data
16	)->markup
17
18	=cut
19
20	has pipe => (
21	is => 'rw',
22	required => 1,
23	default => 'Frey::Feed/data+uri=http://blog.rot13.org/index.xml\|Frey::Dumper/markup',
24	);
25
26	use Data::Dump qw/dump/;
27
28	sub markup {
29	my ($self) = @_;
30
31	my $out;
32	my $pipe;
33
34	foreach my $part ( split(/\\|/, $self->pipe ) ) {
35	warn "# part: '$part'";
36	if ( $part =~ m{^([^/]+)/([^\+]+)(\+.*)?$} ) {
37	my ( $class, $method, $args ) = ( $1, $2, $3 );
38	my $params = $pipe;
39	if ( defined $args ) {
40	$args =~ s/^\+//;
41	warn "# class $class method $method args $args", $pipe ? " pipe args " . join(',',keys %$pipe) : '';
42	map {
43	my ( $name, $value ) = ( $1, $2 ) if m{^([^=]+)=(.+)$};
44	$params->{$name} = $value;
45	} split(/[\s\+]/, $args)
46	}
47	my $code = '$result = ' . $class . '->new' . dump( %$params ) . '->' . $method . '();';
48	warn "# pipe $part -> $code";
49	my $result;
50	eval $code;
51	die $@ if $@;
52	warn "# result ",ref( $result );
53	$out .= qq{<code>$part</code>} . dump( $result ) . '<hr>';
54	$pipe = { $method => $result };
55	} else {
56	die "don't know what to do with '$part' from ",$self->pipe;
57	}
58	}
59
60	return $out;
61	}
62
63	1;