lib/Frey/Pipe.pm

package Frey::Pipe;
use Moose;

with 'Frey::Config';

=head1 DESCRIPTION

Shell pipes for structured data

=head1 EXAMPLE

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

this will produce following code:

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

=cut

has pipe => (
        is => 'rw',
        required => 1,
        default => 'Frey::Feed/data+uri=https://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{^[\?\+\s]}{};
                                warn "# class $class method $method args '$args'", $pipe ? " pipe args " . join(',',keys %$pipe) : '';
                                map {
                                        my ( $name, $value ) = ( $1, $2 ) if m{^([^=]+)=(.+)$} || confess "can't parse '$_'";
                                        $params->{$name} = $value;
                                } split(/\s*\+\s/, $args)
                        }
                        my $default = $self->config( $class );
                        foreach my $arg ( keys %$default ) {
                                $params->{$arg} = $default->{$arg} if ! $params->{$arg};
                        }
                        my $code = '$result = ' . $class . '->new' . dump( %$params ) . '->' . $method . '();';
                        warn "# pipe $part -> $code";
                        my $result;
                        eval $code;
                        die $@ if $@;
                        warn "# result ",ref( $result );
#                       $out .= qq{<span class="frey-popdown">$part<code>} . dump( $result ) . '</code><span><hr>';
                        $out = $result;
                        $pipe = { $method => $result };
                } else {
                        die "don't know what to do with '$part' from ",$self->pipe;
                }
        }

        return '<code>' . $self->pipe . '</code>' . $out;
}

1;
1	package Frey::Pipe;
2	use Moose;
3
4	with 'Frey::Config';
5
6	=head1 DESCRIPTION
7
8	Shell pipes for structured data
9
10	=head1 EXAMPLE
11
12	Frey::Feed/data + uri=https://blog.rot13.org/index.xml \| Frey::Dumper/markup
13
14	this will produce following code:
15
16	Frey::Dumper->new( data =>
17	Frey::Feed->new( uri => 'https://blog.rot13.org/index.xml' )->data
18	)->markup
19
20	=cut
21
22	has pipe => (
23	is => 'rw',
24	required => 1,
25	default => 'Frey::Feed/data+uri=https://blog.rot13.org/index.xml\|Frey::Dumper/markup',
26	);
27
28	use Data::Dump qw/dump/;
29
30	sub markup {
31	my ($self) = @_;
32
33	my $out;
34	my $pipe;
35
36	foreach my $part ( split(/\\|/, $self->pipe ) ) {
37	warn "# part: '$part'";
38	if ( $part =~ m{^([^/]+)/([^\+\?]+)(.*)?$} ) {
39	my ( $class, $method, $args ) = ( $1, $2, $3 );
40	my $params = $pipe;
41	if ( defined $args ) {
42	$args =~ s{^[\?\+\s]}{};
43	warn "# class $class method $method args '$args'", $pipe ? " pipe args " . join(',',keys %$pipe) : '';
44	map {
45	my ( $name, $value ) = ( $1, $2 ) if m{^([^=]+)=(.+)$} \|\| confess "can't parse '$_'";
46	$params->{$name} = $value;
47	} split(/\s*\+\s/, $args)
48	}
49	my $default = $self->config( $class );
50	foreach my $arg ( keys %$default ) {
51	$params->{$arg} = $default->{$arg} if ! $params->{$arg};
52	}
53	my $code = '$result = ' . $class . '->new' . dump( %$params ) . '->' . $method . '();';
54	warn "# pipe $part -> $code";
55	my $result;
56	eval $code;
57	die $@ if $@;
58	warn "# result ",ref( $result );
59	# $out .= qq{<span class="frey-popdown">$part<code>} . dump( $result ) . '</code><span><hr>';
60	$out = $result;
61	$pipe = { $method => $result };
62	} else {
63	die "don't know what to do with '$part' from ",$self->pipe;
64	}
65	}
66
67	return '<code>' . $self->pipe . '</code>' . $out;
68	}
69
70	1;