lib/Frey/Pipe.pm

package Frey::Pipe;
use Moose;
extends 'Frey::ClassLoader';
with 'Frey::Web';

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 );
                        push @parts, { $class => { method => $method, args => $args } };
                        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->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;
                }
        }

        warn "# pipe ", $self->title, " parts ",dump( @parts );
        $self->add_status( $_ ) foreach @parts;
        return $out;
}

1;
1	package Frey::Pipe;
2	use Moose;
3	extends 'Frey::ClassLoader';
4	with 'Frey::Web';
5
6	use Frey::Action;
7
8	=head1 DESCRIPTION
9
10	Shell pipes for structured data
11
12	=head1 EXAMPLE
13
14	Frey::Feed/as_data + uri=http://blog.rot13.org/index.xml \| Frey::View::Dumper/as_markup
15
16	this will produce following code:
17
18	Frey::View::Dumper->new( data =>
19	Frey::Feed->new( uri => 'http://blog.rot13.org/index.xml' )->as_data
20	)->as_markup
21
22	=cut
23
24	has pipe => (
25	is => 'rw',
26	required => 1,
27	default => 'Frey::Feed/as_data+uri=http://blog.rot13.org/index.xml\|Frey::View::Dumper/as_markup',
28	);
29
30	use Data::Dump qw/dump/;
31
32	sub as_markup {
33	my ($self) = @_;
34
35	my $out;
36	my $pipe;
37
38	$self->title( $self->pipe );
39
40	my @parts;
41
42	foreach my $part ( split(/\\|/, $self->pipe ) ) {
43	warn "# part: '$part'";
44	if ( $part =~ m{^([^/]+)/([^\+\?]+)(.*)?$} ) {
45	my ( $class, $method, $args ) = ( $1, $2, $3 );
46	push @parts, { $class => { method => $method, args => $args } };
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->content_type( $o->content_type ) if $o->can('content_type');
67
68	$out = $result;
69	$method =~ s{^as_}{};
70	$pipe = { $method => $result };
71	} else {
72	die "don't know what to do with '$part' from ",$self->pipe;
73	}
74	}
75
76	warn "# pipe ", $self->title, " parts ",dump( @parts );
77	$self->add_status( $_ ) foreach @parts;
78	return $out;
79	}
80
81	1;