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 );

                        # XXX copy depends from parts of pipe
                        if ( $o->can('depends') ) {
                                $o->depends;
                                my $current_head;
                                $current_head->{$_}++ foreach $self->head;
                                foreach ( $o->head ) {
                                        next if $current_head->{$_}++;
                                        $self->add_head( $_ );
                                }
                        }

                        my $result = $o->$method;
                        warn "# result ",length( $result ), " bytes ", ref($result);

                        my $current_status;
                        $current_status->{$_}++ foreach $self->status;
                        foreach ( $o->status ) {
                                next if $current_status->{$_}++;
                                $self->add_status( $_ );
                                warn "# pipe add_status: $_";
                        }

                        $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	dpavlin	300	package Frey::Pipe;
2			use Moose;
3	dpavlin	797	extends 'Frey::Class::Loader';
4	dpavlin	401	with 'Frey::Web';
5	dpavlin	368
6	dpavlin	861	use lib 'lib';
7	dpavlin	386	use Frey::Action;
8
9	dpavlin	300	=head1 DESCRIPTION
10
11			Shell pipes for structured data
12
13			=head1 EXAMPLE
14
15	dpavlin	467	Frey::Feed/as_data + uri=http://blog.rot13.org/index.xml \| Frey::View::Dumper/as_markup
16	dpavlin	300
17			this will produce following code:
18
19	dpavlin	467	Frey::View::Dumper->new( data =>
20	dpavlin	455	Frey::Feed->new( uri => 'http://blog.rot13.org/index.xml' )->as_data
21			)->as_markup
22	dpavlin	300
23			=cut
24
25			has pipe => (
26			is => 'rw',
27			required => 1,
28	dpavlin	467	default => 'Frey::Feed/as_data+uri=http://blog.rot13.org/index.xml\|Frey::View::Dumper/as_markup',
29	dpavlin	300	);
30
31			use Data::Dump qw/dump/;
32
33	dpavlin	455	sub as_markup {
34	dpavlin	300	my ($self) = @_;
35
36			my $out;
37			my $pipe;
38
39	dpavlin	507	$self->title( $self->pipe );
40	dpavlin	418
41	dpavlin	507	my @parts;
42
43	dpavlin	300	foreach my $part ( split(/\\|/, $self->pipe ) ) {
44			warn "# part: '$part'";
45	dpavlin	377	if ( $part =~ m{^([^/]+)/([^\+\?]+)(.*)?$} ) {
46	dpavlin	300	my ( $class, $method, $args ) = ( $1, $2, $3 );
47			my $params = $pipe;
48	dpavlin	386	$params = {} unless defined $params;
49	dpavlin	300	if ( defined $args ) {
50	dpavlin	377	$args =~ s{^[\?\+\s]}{};
51	dpavlin	384	warn "# class $class method $method args '$args'", $pipe ? " pipe args " . join(',',keys %$pipe) : '' if $self->debug;
52	dpavlin	300	map {
53	dpavlin	377	my ( $name, $value ) = ( $1, $2 ) if m{^([^=]+)=(.+)$} \|\| confess "can't parse '$_'";
54	dpavlin	300	$params->{$name} = $value;
55	dpavlin	377	} split(/\s*\+\s/, $args)
56	dpavlin	300	}
57	dpavlin	386
58			my ( $html, $default ) = Frey::Action->new( class => $class, params => $params )->params_form;
59	dpavlin	414	warn "$class need more params than ",dump( $default ) if $html && $self->debug; # FIXME replace with query
60	dpavlin	386
61	dpavlin	451	warn "# pipe $part" if $self->debug;
62	dpavlin	457	my $o = $self->new_frey_class( $class, $default );
63	dpavlin	923
64			# XXX copy depends from parts of pipe
65			if ( $o->can('depends') ) {
66			$o->depends;
67			my $current_head;
68	dpavlin	933	$current_head->{$_}++ foreach $self->head;
69	dpavlin	923	foreach ( $o->head ) {
70			next if $current_head->{$_}++;
71			$self->add_head( $_ );
72			}
73			}
74
75	dpavlin	451	my $result = $o->$method;
76			warn "# result ",length( $result ), " bytes ", ref($result);
77
78	dpavlin	933	my $current_status;
79			$current_status->{$_}++ foreach $self->status;
80			foreach ( $o->status ) {
81			next if $current_status->{$_}++;
82			$self->add_status( $_ );
83			warn "# pipe add_status: $_";
84			}
85	dpavlin	519
86	dpavlin	451	$self->content_type( $o->content_type ) if $o->can('content_type');
87
88	dpavlin	327	$out = $result;
89	dpavlin	455	$method =~ s{^as_}{};
90	dpavlin	300	$pipe = { $method => $result };
91			} else {
92			die "don't know what to do with '$part' from ",$self->pipe;
93			}
94			}
95
96	dpavlin	861	$out = $self->error("$out not scalar" . $self->html_dump($out) ) if ref $out;
97
98	dpavlin	418	return $out;
99	dpavlin	300	}
100
101			1;