lib/Frey/Pipe.pm

package Frey::Pipe;
use Moose;
extends 'Frey::Class::Loader';
with 'Frey::Web';

use lib 'lib';
use Frey::Action;

=head1 DESCRIPTION

Shell pipes for structured data

=head1 EXAMPLE

 Frey::Feed/as_data + uri=http://blog.rot13.org/index.xml | Frey::View::Dumper/as_markup

this will produce following code:

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

=cut

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

use Data::Dump qw/dump/;

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

        my $out;
        my $pipe;

        $self->title( $self->pipe );

        my @parts;

        foreach my $part ( split(/\|/, $self->pipe ) ) {
                warn "# part: '$part'";
                if ( $part =~ m{^([^/]+)/([^\+\?]+)(.*)?$} ) {
                        my ( $class, $method, $args ) = ( $1, $2, $3 );
                        my $params = $pipe;
                        $params = {} unless defined $params;
                        if ( defined $args ) {
                                $args =~ s{^[\?\+\s]}{};
                                warn "# class $class method $method args '$args'", $pipe ? " pipe args " . join(',',keys %$pipe) : '' if $self->debug;
                                map {
                                        my ( $name, $value ) = ( $1, $2 ) if m{^([^=]+)=(.+)$} || confess "can't parse '$_'";
                                        $params->{$name} = $value;
                                } split(/\s*\+\s/, $args)
                        }

                        my ( $html, $default ) = Frey::Action->new( class => $class, params => $params )->params_form;
                        warn "$class need more params than ",dump( $default ) if $html && $self->debug; # FIXME replace with query

                        warn "# pipe $part" if $self->debug;
                        my $o = $self->new_frey_class( $class, $default );
                        my $result = $o->$method;
                        warn "# result ",length( $result ), " bytes ", ref($result);

                        $self->add_status({ $part => { $class => { method => $method, args => $args } } });

                        $self->content_type( $o->content_type ) if $o->can('content_type');

                        $out = $result;
                        $method =~ s{^as_}{};
                        $pipe = { $method => $result };
                } else {
                        die "don't know what to do with '$part' from ",$self->pipe;
                }
        }

        $out = $self->error("$out not scalar" . $self->html_dump($out) ) if ref $out;

        return $out;
}

1;
1	package Frey::Pipe;
2	use Moose;
3	extends 'Frey::Class::Loader';
4	with 'Frey::Web';
5
6	use lib 'lib';
7	use Frey::Action;
8
9	=head1 DESCRIPTION
10
11	Shell pipes for structured data
12
13	=head1 EXAMPLE
14
15	Frey::Feed/as_data + uri=http://blog.rot13.org/index.xml \| Frey::View::Dumper/as_markup
16
17	this will produce following code:
18
19	Frey::View::Dumper->new( data =>
20	Frey::Feed->new( uri => 'http://blog.rot13.org/index.xml' )->as_data
21	)->as_markup
22
23	=cut
24
25	has pipe => (
26	is => 'rw',
27	required => 1,
28	default => 'Frey::Feed/as_data+uri=http://blog.rot13.org/index.xml\|Frey::View::Dumper/as_markup',
29	);
30
31	use Data::Dump qw/dump/;
32
33	sub as_markup {
34	my ($self) = @_;
35
36	my $out;
37	my $pipe;
38
39	$self->title( $self->pipe );
40
41	my @parts;
42
43	foreach my $part ( split(/\\|/, $self->pipe ) ) {
44	warn "# part: '$part'";
45	if ( $part =~ m{^([^/]+)/([^\+\?]+)(.*)?$} ) {
46	my ( $class, $method, $args ) = ( $1, $2, $3 );
47	my $params = $pipe;
48	$params = {} unless defined $params;
49	if ( defined $args ) {
50	$args =~ s{^[\?\+\s]}{};
51	warn "# class $class method $method args '$args'", $pipe ? " pipe args " . join(',',keys %$pipe) : '' if $self->debug;
52	map {
53	my ( $name, $value ) = ( $1, $2 ) if m{^([^=]+)=(.+)$} \|\| confess "can't parse '$_'";
54	$params->{$name} = $value;
55	} split(/\s*\+\s/, $args)
56	}
57
58	my ( $html, $default ) = Frey::Action->new( class => $class, params => $params )->params_form;
59	warn "$class need more params than ",dump( $default ) if $html && $self->debug; # FIXME replace with query
60
61	warn "# pipe $part" if $self->debug;
62	my $o = $self->new_frey_class( $class, $default );
63	my $result = $o->$method;
64	warn "# result ",length( $result ), " bytes ", ref($result);
65
66	$self->add_status({ $part => { $class => { method => $method, args => $args } } });
67
68	$self->content_type( $o->content_type ) if $o->can('content_type');
69
70	$out = $result;
71	$method =~ s{^as_}{};
72	$pipe = { $method => $result };
73	} else {
74	die "don't know what to do with '$part' from ",$self->pipe;
75	}
76	}
77
78	$out = $self->error("$out not scalar" . $self->html_dump($out) ) if ref $out;
79
80	return $out;
81	}
82
83	1;