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