package Catalyst::Component;
-use strict;
-use base qw/Class::Accessor::Fast Class::Data::Inheritable/;
-use NEXT;
+use Moose;
+use Class::MOP;
+use MooseX::Adopt::Class::Accessor::Fast;
+use Catalyst::Utils;
+use MRO::Compat;
+use mro 'c3';
+
+with 'MooseX::Emulate::Class::Accessor::Fast';
+with 'Catalyst::ClassData';
-__PACKAGE__->mk_classdata($_) for qw/_config _plugins/;
=head1 NAME
=head1 DESCRIPTION
-This is the universal base class for Catalyst components
+This is the universal base class for Catalyst components
(Model/View/Controller).
It provides you with a generic new() for instantiation through Catalyst's
component loader with config() support and a process() method placeholder.
-=head1 METHODS
-
-=head2 new($c)
-
=cut
-sub new {
- my ( $self, $c ) = @_;
+__PACKAGE__->mk_classdata('_plugins');
+
+around new => sub {
+ my ( $orig, $self) = @_;
# Temporary fix, some components does not pass context to constructor
my $arguments = ( ref( $_[-1] ) eq 'HASH' ) ? $_[-1] : {};
- return $self->NEXT::new( { %{ $self->config }, %{$arguments} } );
-}
+ my $args = $self->merge_config_hashes( $self->config, $arguments );
+ $self->$orig( $args );
+};
-=head2 COMPONENT($c)
-
-=cut
+no Moose;
sub COMPONENT {
my ( $self, $c ) = @_;
# Temporary fix, some components does not pass context to constructor
my $arguments = ( ref( $_[-1] ) eq 'HASH' ) ? $_[-1] : {};
-
- if ( my $new = $self->NEXT::COMPONENT( $c, $arguments ) ) {
- return $new;
+ if( my $next = $self->next::can ){
+ my $class = blessed $self || $self;
+ my ($next_package) = Class::MOP::get_code_info($next);
+ warn "There is a COMPONENT method resolving after Catalyst::Component in ${next_package}. This behavior is deprecated and will stop working in future releases.";
+ return $next->($self, $arguments);
}
- else {
- if ( my $new = $self->new( $c, $arguments ) ) {
- return $new;
- }
- else {
- my $class = ref $self || $self;
- my $new = { %{ $self->config }, %{$arguments} };
- return bless $new, $class;
+ return $self->new($c, $arguments);
+}
+
+sub config {
+ my $self = shift;
+ my $class = blessed $self || $self;
+
+ my $config;
+ my $meta = $class->meta;
+ if( $meta->has_package_symbol('$config') ){
+ $config = ${ $meta->get_package_symbol('$config') };
+ } else {
+ foreach my $super ( $meta->linearized_isa ) {
+ my $super_meta = Moose::Meta::Class->initialize($super);
+ if( $super_meta->has_package_symbol('$config') ){
+ $config = ${ $super_meta->get_package_symbol('$config') };
+ unless( @_ ){ #don't copy and write it twice
+ $config = $class->merge_config_hashes( $config, {} );
+ $meta->add_package_symbol('$config', \ $config);
}
+ last;
+ }
}
+ }
+
+ unless( defined $config ){
+ $config = {};
+ $meta->add_package_symbol('$config', \ $config) unless @_;
+ }
+
+ if (@_) {
+ my $from_args = { %{@_ > 1 ? {@_} : $_[0]} };
+ my $new_config = $class->merge_config_hashes( $config, $from_args);
+ $meta->add_package_symbol('$config', \ $new_config);
+ }
+
+ return $config;
+}
+
+sub merge_config_hashes {
+ my ( $self, $lefthash, $righthash ) = @_;
+
+ return Catalyst::Utils::merge_hashes( $lefthash, $righthash );
+}
+
+sub process {
+
+ Catalyst::Exception->throw( message => ( ref $_[0] || $_[0] )
+ . " did not override Catalyst::Component::process" );
}
-# remember to leave blank lines between the consecutive =head2's
-# otherwise the pod tools don't recognize the subsequent =head2s
+
+__PACKAGE__->meta->make_immutable;
+1;
+
+__END__
+
+=head1 METHODS
+
+=head2 new($c, $arguments)
+
+Called by COMPONENT to instantiate the component; should return an object
+to be stored in the application's component hash.
+
+=head2 COMPONENT($c, $arguments)
+
+If this method is present (as it is on all Catalyst::Component subclasses,
+it is called by Catalyst during setup_components with the application class
+as $c and any config entry on the application for this component (for example,
+in the case of MyApp::Controller::Foo this would be
+MyApp->config->{'Controller::Foo'}). The arguments are expected to be a
+hashref and are merged with the __PACKAGE__->config hashref before calling
+->new to instantiate the component.
=head2 $c->config
=head2 $c->config($key, $value, ...)
-=cut
-
-sub config {
- my $self = shift;
- my $config = $self->_config;
- unless ($config) {
- $self->_config( {} );
- $config = {};
- }
- if (@_) {
- $config = { %{$config}, %{@_ > 1 ? {@_} : $_[0]} };
- $self->_config($config);
- }
- return $config;
-}
+Accessor for this component's config hash. Config values can be set as
+key value pair, or you can specify a hashref. In either case the keys
+will be merged with any existing config settings. Each component in
+a Catalyst application has it's own config hash.
=head2 $c->process()
-=cut
+This is the default method called on a Catalyst component in the dispatcher.
+For instance, Views implement this action to render the response body
+when you forward to them. The default is an abstract method.
-sub process {
+=head2 $c->merge_config_hashes( $hashref, $hashref )
- Catalyst::Exception->throw( message => ( ref $_[0] || $_[0] )
- . " did not override Catalyst::Component::process" );
-}
+Merges two hashes together recursively, giving right-hand precedence.
+Alias for the method in L<Catalyst::Utils>.
+
+=head1 OPTIONAL METHODS
+
+=head2 ACCEPT_CONTEXT($c, @args)
+
+Catalyst components are normally initalized during server startup, either
+as a Class or a Instance. However, some components require information about
+the current request. To do so, they can implement an ACCEPT_CONTEXT method.
+
+If this method is present, it is called during $c->comp/controller/model/view
+with the current $c and any additional args (e.g. $c->model('Foo', qw/bar baz/)
+would cause your MyApp::Model::Foo instance's ACCEPT_CONTEXT to be called with
+($c, 'bar', 'baz')) and the return value of this method is returned to the
+calling code in the application rather than the component itself.
=head1 SEE ALSO
the same terms as Perl itself.
=cut
-
-1;