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	dpavlin	300	package Frey::Pipe;
2			use Moose;
3
4	dpavlin	368	with 'Frey::Config';
5
6	dpavlin	300	=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	dpavlin	377	if ( $part =~ m{^([^/]+)/([^\+\?]+)(.*)?$} ) {
39	dpavlin	300	my ( $class, $method, $args ) = ( $1, $2, $3 );
40			my $params = $pipe;
41			if ( defined $args ) {
42	dpavlin	377	$args =~ s{^[\?\+\s]}{};
43			warn "# class $class method $method args '$args'", $pipe ? " pipe args " . join(',',keys %$pipe) : '';
44	dpavlin	300	map {
45	dpavlin	377	my ( $name, $value ) = ( $1, $2 ) if m{^([^=]+)=(.+)$} \|\| confess "can't parse '$_'";
46	dpavlin	300	$params->{$name} = $value;
47	dpavlin	377	} split(/\s*\+\s/, $args)
48	dpavlin	300	}
49	dpavlin	368	my $default = $self->config( $class );
50			foreach my $arg ( keys %$default ) {
51			$params->{$arg} = $default->{$arg} if ! $params->{$arg};
52			}
53	dpavlin	300	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	dpavlin	327	# $out .= qq{<span class="frey-popdown">$part<code>} . dump( $result ) . '</code><span><hr>';
60			$out = $result;
61	dpavlin	300	$pipe = { $method => $result };
62			} else {
63			die "don't know what to do with '$part' from ",$self->pipe;
64			}
65			}
66
67	dpavlin	377	return '<code>' . $self->pipe . '</code>' . $out;
68	dpavlin	300	}
69
70			1;