Frey/Class/Loader.pm

package Frey::ClassLoader;
use Moose;

=head1 DESCRIPTION

Load L<Frey> classes

=cut

extends 'Frey';

use Data::Dump qw/dump/;
use File::Find;

our $class_path;
our @classes;

=head2 classes

Return all local classes by reading from disk

  my @classes = $o->classes;

=cut

sub classes {
        my $self = shift;
        return @classes if @classes;

        # FIXME there must be better way to do this in Moose style
        finddepth({ no_chdir => 1, wanted => sub {
                return unless m{\.pm$};
                my $class = $_;
                $class =~ s{^lib/}{};
                $class =~ s{\.pm$}{};
                $class =~ s{/}{::}g;
                if ( $class =~ m{Mojo} ) {
                        warn "# skip Mojo class $class";
                        return;
                }
                $class_path->{ $class } = $_;
        } }, 'lib');
        warn "## class_path = ",dump( $class_path ) if $self->debug;

        @classes = sort keys %$class_path;
}

=head2 class_path

Return any local or loaded class

  $path = $o->class_path( $class );

=cut

sub class_path {
        my ( $self, $class ) = @_;
        $self->classes unless $class_path;
        if ( ! defined $class_path->{$class} ) {
                my $path = $class;
                $path =~ s{::}{/}g;
                $path .= '.pm';
                $path = $INC{$path};
                warn "# $class from INC $path";
                $class_path->{$class} = $path || confess "can't find path for $class";
        }
        return $class_path->{$class};
}

=head2 loaded_classes

  my $available = $o->loaded_classes;
  $available->{'Frey'} # true

=cut

our $loaded_class;
sub loaded_classes { $loaded_class };

=head2 class_meta

  my ( $meta, $is_role, $instance ) = $o->class_meta( 'Some::Class' );

=cut

sub class_meta {
        my ( $self, $class ) = @_;

        $class ||= $self->class if $self->can('class');
        warn "# class_meta $class";

        $self->load_class($class);

        my $meta;
        my $is_role = 0;
        my $instance;

        if ( ! $class->can('meta') ) {
                $instance = Moose::Meta::Class->create_anon_class;
                warn "# class $class isn't Moose, faking anon class" if $self->debug;
                $meta = $instance->meta;
        } elsif( $class->meta->isa('Moose::Meta::Role') ) {
                $is_role = 1;
                $instance = Frey->new;
                warn "# apply $class on $instance";
                $class->meta->apply( $instance );
                $meta = $instance->meta;
        } else {
                $meta = $class->meta;
        }
        return ( $meta, $is_role, $instance );
}

sub load_class {
        my ( $self, $class ) = @_;
        return if $loaded_class->{$class}++;
        eval {
                Class::MOP::load_class($class)
        };
        warn $@ if $@; # && $@ !~ m/role/;
        warn "# load_class $class" if $self->debug && $loaded_class->{$class} == 1;
}

sub load_all_classes {
        my $self = shift;
        warn "# loaded_class = ",dump( $loaded_class ) if $self->debug;
        $self->load_class( $_ ) foreach ( $self->classes );
        $loaded_class;
}

=head2 class_methods

  my @all_methods = $o->class_methods( $class );

  my $class_method = $o->class_methods( $class );
  if ( $class_method->{ $method } ) {
        # $class has $method
  }

=cut

sub class_methods {
        my ( $self, $class ) = @_;

        confess "need class" unless $class;
        if ( ! $class->can('meta') ) {
                warn "# $class doesn't have meta (isn't Moose class)" if $self->debug;
                return;
        }
        my $meta = $class->meta;

        my $attr;
        my $methods;
        $attr->{$_}++ foreach $meta->get_attribute_list;
        my @methods = map { $methods->{$_}++; $_ } grep { ! defined($attr->{$_}) && $_ ne 'meta' } $meta->get_method_list;
        warn "# methods = ",dump( @methods ) if $self->debug;

        return @methods if wantarray;
        return $methods;
}

=head2 class_runnable

  my @runnable_methods = $o->class_runnable( $class );

=cut

sub class_runnable {
        my ( $self, $class ) = @_;
        my @methods = grep { m{^as_} } $self->class_methods( $class );
        return @methods if wantarray;
        return \@methods;
}

sub class_inputs {
        my ( $self, $class ) = @_;
        my @inputs = grep { m{^(markup/as_data/as_sponge)$} } $self->class_methods( $class );
        return @inputs if wantarray;
        return \@inputs;
}

=head2 new_frey_class

  my $instance = $o->new_frey_class( $class, $params );

This will apply L<Moose::Role> on the fly to provide accessors for
C<data> and C<sponge> in form of C<as_*>

See L<http://www.perlmonks.org/?node_id=602389>

It is used by L<Frey::Run> and L<Frey::Pipe> to create objects

=cut

{
        package Frey::Role::as_data;
        use Moose::Role;

        sub as_data {
                my ($self) = @_;
                $self->data;
        }

        package Frey::Role::as_sponge;
        use Moose::Role;
        sub as_sponge {
                my ($self) = @_;
                $self->sponge;
        }
}

sub new_frey_class {
        my ( $self, $class, $params ) = @_;
        my $instance = $class->new( %$params );
        if ( $instance->can('data') && ! $instance->can('as_data') ) {
                Frey::Role::as_data->meta->apply( $instance );
                warn "# apply as_data role to $class";
        }
        if ( $instance->can('sponge') && ! $instance->can('as_sponge') ) {
                Frey::Role::as_sponge->meta->apply( $instance );
                warn "# apply as_sponge role to $class";
        }

        $self->add_status({ $class => $params }) if $self->can('add_status');
        return $instance;
}

1;
1	dpavlin	100	package Frey::ClassLoader;
2			use Moose;
3
4	dpavlin	308	=head1 DESCRIPTION
5
6			Load L<Frey> classes
7
8			=cut
9
10	dpavlin	100	extends 'Frey';
11
12			use Data::Dump qw/dump/;
13			use File::Find;
14
15	dpavlin	308	our $class_path;
16	dpavlin	112	our @classes;
17	dpavlin	100
18	dpavlin	308	=head2 classes
19
20	dpavlin	382	Return all local classes by reading from disk
21
22	dpavlin	308	my @classes = $o->classes;
23
24			=cut
25
26	dpavlin	101	sub classes {
27			my $self = shift;
28	dpavlin	112	return @classes if @classes;
29	dpavlin	101
30			# FIXME there must be better way to do this in Moose style
31			finddepth({ no_chdir => 1, wanted => sub {
32	dpavlin	457	return unless m{\.pm$};
33			my $class = $_;
34			$class =~ s{^lib/}{};
35			$class =~ s{\.pm$}{};
36			$class =~ s{/}{::}g;
37	dpavlin	559	if ( $class =~ m{Mojo} ) {
38			warn "# skip Mojo class $class";
39			return;
40			}
41	dpavlin	457	$class_path->{ $class } = $_;
42	dpavlin	101	} }, 'lib');
43	dpavlin	308	warn "## class_path = ",dump( $class_path ) if $self->debug;
44	dpavlin	101
45	dpavlin	308	@classes = sort keys %$class_path;
46	dpavlin	101	}
47
48	dpavlin	308	=head2 class_path
49
50	dpavlin	382	Return any local or loaded class
51
52	dpavlin	308	$path = $o->class_path( $class );
53
54			=cut
55
56			sub class_path {
57			my ( $self, $class ) = @_;
58			$self->classes unless $class_path;
59	dpavlin	382	if ( ! defined $class_path->{$class} ) {
60			my $path = $class;
61			$path =~ s{::}{/}g;
62			$path .= '.pm';
63			$path = $INC{$path};
64			warn "# $class from INC $path";
65	dpavlin	404	$class_path->{$class} = $path \|\| confess "can't find path for $class";
66	dpavlin	382	}
67	dpavlin	308	return $class_path->{$class};
68	dpavlin	101	}
69
70	dpavlin	308	=head2 loaded_classes
71	dpavlin	100
72	dpavlin	308	my $available = $o->loaded_classes;
73			$available->{'Frey'} # true
74	dpavlin	100
75			=cut
76
77	dpavlin	308	our $loaded_class;
78			sub loaded_classes { $loaded_class };
79	dpavlin	100
80	dpavlin	308	=head2 class_meta
81	dpavlin	100
82	dpavlin	431	my ( $meta, $is_role, $instance ) = $o->class_meta( 'Some::Class' );
83	dpavlin	308
84			=cut
85
86			sub class_meta {
87			my ( $self, $class ) = @_;
88
89			$class \|\|= $self->class if $self->can('class');
90			warn "# class_meta $class";
91
92			$self->load_class($class);
93
94	dpavlin	431	my $meta;
95			my $is_role = 0;
96			my $instance;
97
98	dpavlin	308	if ( ! $class->can('meta') ) {
99	dpavlin	431	$instance = Moose::Meta::Class->create_anon_class;
100	dpavlin	457	warn "# class $class isn't Moose, faking anon class" if $self->debug;
101	dpavlin	431	$meta = $instance->meta;
102			} elsif( $class->meta->isa('Moose::Meta::Role') ) {
103	dpavlin	100	$is_role = 1;
104	dpavlin	431	$instance = Frey->new;
105	dpavlin	416	warn "# apply $class on $instance";
106	dpavlin	308	$class->meta->apply( $instance );
107	dpavlin	416	$meta = $instance->meta;
108	dpavlin	431	} else {
109			$meta = $class->meta;
110	dpavlin	100	}
111	dpavlin	431	return ( $meta, $is_role, $instance );
112	dpavlin	100	}
113
114	dpavlin	308	sub load_class {
115			my ( $self, $class ) = @_;
116	dpavlin	457	return if $loaded_class->{$class}++;
117	dpavlin	308	eval {
118	dpavlin	457	Class::MOP::load_class($class)
119	dpavlin	308	};
120			warn $@ if $@; # && $@ !~ m/role/;
121	dpavlin	320	warn "# load_class $class" if $self->debug && $loaded_class->{$class} == 1;
122	dpavlin	308	}
123
124	dpavlin	101	sub load_all_classes {
125			my $self = shift;
126	dpavlin	320	warn "# loaded_class = ",dump( $loaded_class ) if $self->debug;
127	dpavlin	308	$self->load_class( $_ ) foreach ( $self->classes );
128			$loaded_class;
129	dpavlin	101	}
130	dpavlin	100
131	dpavlin	408	=head2 class_methods
132
133	dpavlin	409	my @all_methods = $o->class_methods( $class );
134	dpavlin	408
135	dpavlin	409	my $class_method = $o->class_methods( $class );
136			if ( $class_method->{ $method } ) {
137			# $class has $method
138			}
139
140	dpavlin	408	=cut
141
142			sub class_methods {
143			my ( $self, $class ) = @_;
144
145			confess "need class" unless $class;
146			if ( ! $class->can('meta') ) {
147	dpavlin	457	warn "# $class doesn't have meta (isn't Moose class)" if $self->debug;
148	dpavlin	408	return;
149			}
150			my $meta = $class->meta;
151
152			my $attr;
153	dpavlin	409	my $methods;
154	dpavlin	408	$attr->{$_}++ foreach $meta->get_attribute_list;
155	dpavlin	409	my @methods = map { $methods->{$_}++; $_ } grep { ! defined($attr->{$_}) && $_ ne 'meta' } $meta->get_method_list;
156	dpavlin	408	warn "# methods = ",dump( @methods ) if $self->debug;
157
158	dpavlin	409	return @methods if wantarray;
159			return $methods;
160	dpavlin	408	}
161
162	dpavlin	457	=head2 class_runnable
163
164			my @runnable_methods = $o->class_runnable( $class );
165
166			=cut
167
168			sub class_runnable {
169			my ( $self, $class ) = @_;
170			my @methods = grep { m{^as_} } $self->class_methods( $class );
171			return @methods if wantarray;
172			return \@methods;
173			}
174
175			sub class_inputs {
176			my ( $self, $class ) = @_;
177			my @inputs = grep { m{^(markup/as_data/as_sponge)$} } $self->class_methods( $class );
178			return @inputs if wantarray;
179			return \@inputs;
180			}
181
182			=head2 new_frey_class
183
184			my $instance = $o->new_frey_class( $class, $params );
185
186			This will apply L<Moose::Role> on the fly to provide accessors for
187			C<data> and C<sponge> in form of C<as_*>
188
189			See L<http://www.perlmonks.org/?node_id=602389>
190
191			It is used by L<Frey::Run> and L<Frey::Pipe> to create objects
192
193			=cut
194
195			{
196			package Frey::Role::as_data;
197			use Moose::Role;
198
199			sub as_data {
200			my ($self) = @_;
201			$self->data;
202			}
203
204	dpavlin	462	package Frey::Role::as_sponge;
205	dpavlin	457	use Moose::Role;
206			sub as_sponge {
207			my ($self) = @_;
208			$self->sponge;
209			}
210			}
211
212			sub new_frey_class {
213			my ( $self, $class, $params ) = @_;
214			my $instance = $class->new( %$params );
215			if ( $instance->can('data') && ! $instance->can('as_data') ) {
216			Frey::Role::as_data->meta->apply( $instance );
217			warn "# apply as_data role to $class";
218			}
219			if ( $instance->can('sponge') && ! $instance->can('as_sponge') ) {
220			Frey::Role::as_sponge->meta->apply( $instance );
221			warn "# apply as_sponge role to $class";
222			}
223	dpavlin	519
224			$self->add_status({ $class => $params }) if $self->can('add_status');
225	dpavlin	457	return $instance;
226			}
227
228	dpavlin	100	1;