package Catalyst::Action;
-use strict;
-use base qw/Class::Accessor::Fast/;
+=head1 NAME
+
+Catalyst::Action - Catalyst Action
+
+=head1 SYNOPSIS
+
+ <form action="[%c.uri_for(c.action)%]">
+
+ $c->forward( $action->private_path );
+
+=head1 DESCRIPTION
+
+This class represents a Catalyst Action. You can access the object for the
+currently dispatched action via $c->action. See the L<Catalyst::Dispatcher>
+for more information on how actions are dispatched. Actions are defined in
+L<Catalyst::Controller> subclasses.
+
+=cut
+
+use Moose;
+use Scalar::Util 'looks_like_number';
+use Moose::Util::TypeConstraints ();
+with 'MooseX::Emulate::Class::Accessor::Fast';
+use namespace::clean -except => 'meta';
+
+has class => (is => 'rw');
+has namespace => (is => 'rw');
+has 'reverse' => (is => 'rw');
+has attributes => (is => 'rw');
+has name => (is => 'rw');
+has code => (is => 'rw');
+has private_path => (
+ reader => 'private_path',
+ isa => 'Str',
+ lazy => 1,
+ required => 1,
+ default => sub { '/'.shift->reverse },
+);
+
+has number_of_args => (
+ is=>'ro',
+ init_arg=>undef,
+ isa=>'Int|Undef',
+ required=>1,
+ lazy=>1,
+ builder=>'_build_number_of_args');
+
+ sub _build_number_of_args {
+ my $self = shift;
+ if( ! exists $self->attributes->{Args} ) {
+ # When 'Args' does not exist, that means we want 'any number of args'.
+ return undef;
+ } elsif(!defined($self->attributes->{Args}[0])) {
+ # When its 'Args' that internal cue for 'unlimited'
+ return undef;
+ } elsif(
+ scalar(@{$self->attributes->{Args}}) == 1 &&
+ looks_like_number($self->attributes->{Args}[0])
+ ) {
+ # 'Old school' numbered args (is allowed to be undef as well)
+ return $self->attributes->{Args}[0];
+ } else {
+ # New hotness named arg constraints
+ return $self->number_of_args_constraints;
+ }
+ }
+
+sub normalized_arg_number {
+ return defined($_[0]->number_of_args) ? $_[0]->number_of_args : ~0;
+}
+
+has number_of_args_constraints => (
+ is=>'ro',
+ isa=>'Int|Undef',
+ init_arg=>undef,
+ required=>1,
+ lazy=>1,
+ builder=>'_build_number_of_args_constraints');
+
+ sub _build_number_of_args_constraints {
+ my $self = shift;
+ return unless $self->has_args_constraints;
+
+ my $total = 0;
+ foreach my $tc( @{$self->args_constraints}) {
+ if($tc->is_a_type_of('Ref')) {
+ if($tc->can('parameters') && $tc->has_parameters) {
+ my $total_params = scalar(@{ $tc->parameters||[] });
+ $total = $total + $total_params;
+ } else {
+ # Its a Reftype but we don't know the number of params it
+ # actually validates.
+ return undef;
+ }
+ } else {
+ $total++;
+ }
+ }
+
+ return $total;
+ }
+
+has args_constraints => (
+ is=>'ro',
+ init_arg=>undef,
+ traits=>['Array'],
+ isa=>'ArrayRef',
+ required=>1,
+ lazy=>1,
+ builder=>'_build_args_constraints',
+ handles => {
+ has_args_constraints => 'count',
+ args_constraint_count => 'count',
+ });
+
+ sub _build_args_constraints {
+ my $self = shift;
+ my @arg_protos = @{$self->attributes->{Args}||[]};
+
+ return [] unless scalar(@arg_protos);
+ return [] unless defined($arg_protos[0]);
+
+ # If there is only one arg and it looks like a number
+ # we assume its 'classic' and the number is the number of
+ # constraints.
+ my @args = ();
+ if(
+ scalar(@arg_protos) == 1 &&
+ looks_like_number($arg_protos[0])
+ ) {
+ return \@args;
+ } else {
+ @args =
+ map { my @tc = $self->resolve_type_constraint($_); scalar(@tc) ? @tc : die "$_ is not a constraint!" }
+ @arg_protos;
+ }
+ return \@args;
+ }
+
+has number_of_captures_constraints => (
+ is=>'ro',
+ isa=>'Int|Undef',
+ init_arg=>undef,
+ required=>1,
+ lazy=>1,
+ builder=>'_build_number_of_capture_constraints');
+
+ sub _build_number_of_capture_constraints {
+ my $self = shift;
+ return unless $self->has_captures_constraints;
+
+ my $total = 0;
+ foreach my $tc( @{$self->captures_constraints}) {
+ if($tc->is_a_type_of('Ref')) {
+ if($tc->can('parameters') && $tc->has_parameters) {
+ my $total_params = scalar(@{ $tc->parameters||[] });
+ $total = $total + $total_params;
+ } else {
+ # Its a Reftype but we don't know the number of params it
+ # actually validates. This is not currently permitted in
+ # a capture...
+ die "You cannot use CaptureArgs($tc) in ${\$self->reverse} because we cannot determined the number of its parameters";
+ }
+ } else {
+ $total++;
+ }
+ }
+
+ return $total;
+ }
+
+has captures_constraints => (
+ is=>'ro',
+ init_arg=>undef,
+ traits=>['Array'],
+ isa=>'ArrayRef',
+ required=>1,
+ lazy=>1,
+ builder=>'_build_captures_constraints',
+ handles => {
+ has_captures_constraints => 'count',
+ captures_constraints_count => 'count',
+ });
+
+ sub _build_captures_constraints {
+ my $self = shift;
+ my @arg_protos = @{$self->attributes->{CaptureArgs}||[]};
+
+ return [] unless scalar(@arg_protos);
+ return [] unless defined($arg_protos[0]);
+ # If there is only one arg and it looks like a number
+ # we assume its 'classic' and the number is the number of
+ # constraints.
+ my @args = ();
+ if(
+ scalar(@arg_protos) == 1 &&
+ looks_like_number($arg_protos[0])
+ ) {
+ return \@args;
+ } else {
+ @args =
+ map { my @tc = $self->resolve_type_constraint($_); scalar(@tc) ? @tc : die "$_ is not a constraint!" }
+ @arg_protos;
+ }
+
+ return \@args;
+ }
+
+sub resolve_type_constraint {
+ my ($self, $name) = @_;
+ my @tc = eval "package ${\$self->class}; $name";
+ return @tc if $tc[0];
+ return Moose::Util::TypeConstraints::find_or_parse_type_constraint($name);
+}
+
+has number_of_captures => (
+ is=>'ro',
+ init_arg=>undef,
+ isa=>'Int',
+ required=>1,
+ lazy=>1,
+ builder=>'_build_number_of_captures');
+
+ sub _build_number_of_captures {
+ my $self = shift;
+ if( ! exists $self->attributes->{CaptureArgs} ) {
+ # If there are no defined capture args, thats considered 0.
+ return 0;
+ } elsif(!defined($self->attributes->{CaptureArgs}[0])) {
+ # If you fail to give a defined value, that's also 0
+ return 0;
+ } elsif(
+ scalar(@{$self->attributes->{CaptureArgs}}) == 1 &&
+ looks_like_number($self->attributes->{CaptureArgs}[0])
+ ) {
+ # 'Old school' numbered captures
+ return $self->attributes->{CaptureArgs}[0];
+ } else {
+ # New hotness named arg constraints
+ return $self->number_of_captures_constraints;
+ }
+ }
-__PACKAGE__->mk_accessors(qw/code namespace reverse/);
use overload (
# Stringify to reverse for debug output etc.
q{""} => sub { shift->{reverse} },
- # Codulate to encapsulated action coderef
- '&{}' => sub { shift->{code} },
+ # Codulate to execute to invoke the encapsulated action coderef
+ '&{}' => sub { my $self = shift; sub { $self->execute(@_); }; },
+
+ # Make general $stuff still work
+ fallback => 1,
);
-=head1 NAME
+no warnings 'recursion';
-Catalyst::Action - Catalyst Action
+sub dispatch { # Execute ourselves against a context
+ my ( $self, $c ) = @_;
+ return $c->execute( $self->class, $self );
+}
-=head1 SYNOPSIS
+sub execute {
+ my $self = shift;
+ $self->code->(@_);
+}
-See L<Catalyst>.
+sub match {
+ my ( $self, $c ) = @_;
+ return $self->match_args($c, $c->req->args);
+}
-=head1 DESCRIPTION
+sub match_args {
+ my ($self, $c, $args) = @_;
+ my @args = @{$args||[]};
-=head1 METHODS
+ # If infinite args, we always match
+ return 1 if $self->normalized_arg_number == ~0;
-=over 4
+ # There there are arg constraints, we must see to it that the constraints
+ # check positive for each arg in the list.
+ if($self->has_args_constraints) {
+ # If there is only one type constraint, and its a Ref or subtype of Ref,
+ # That means we expect a reference, so use the full args arrayref.
+ if(
+ $self->args_constraint_count == 1 &&
+ (
+ $self->args_constraints->[0]->is_a_type_of('Ref') ||
+ $self->args_constraints->[0]->is_a_type_of('ClassName')
+ )
+ ) {
+ return $self->args_constraints->[0]->check($args);
+ # Removing coercion stuff for the first go
+ #if($self->args_constraints->[0]->coercion && $self->attributes->{Coerce}) {
+ # my $coerced = $self->args_constraints->[0]->coerce($c) || return 0;
+ # $c->req->args([$coerced]);
+ # return 1;
+ #}
+ } else {
+ # Because of the way chaining works, we can expect args that are totally not
+ # what you'd expect length wise. When they don't match length, thats a fail
+ return 0 unless scalar( @args ) == $self->normalized_arg_number;
-=item code
+ for my $i(0..$#args) {
+ $self->args_constraints->[$i]->check($args[$i]) || return 0;
+ }
+ return 1;
+ }
+ } else {
+ # Otherwise, we just need to match the number of args.
+ return scalar( @args ) == $self->normalized_arg_number;
+ }
+}
-=item execute
+sub match_captures {
+ my ($self, $c, $captures) = @_;
+ my @captures = @{$captures||[]};
-=cut
+ return 1 unless scalar(@captures); # If none, just say its ok
-sub execute { # Execute ourselves against a context
- my ( $self, $c ) = @_;
- return $c->execute( $self->namespace, $self );
+ if($self->has_captures_constraints) {
+ if(
+ $self->captures_constraints_count == 1 &&
+ (
+ $self->captures_constraints->[0]->is_a_type_of('Ref') ||
+ $self->captures_constraints->[0]->is_a_type_of('ClassName')
+ )
+ ) {
+ return $self->captures_constraints->[0]->check($captures);
+ } else {
+ for my $i(0..$#captures) {
+ $self->captures_constraints->[$i]->check($captures[$i]) || return 0;
+ }
+ return 1;
+ }
+ } else {
+ return 1;
+ }
+ return 1;
}
-=item namespace
+sub compare {
+ my ($a1, $a2) = @_;
+ return $a1->normalized_arg_number <=> $a2->normalized_arg_number;
+}
-=item reverse
+sub scheme {
+ return exists $_[0]->attributes->{Scheme} ? $_[0]->attributes->{Scheme}[0] : undef;
+}
-=item new
+sub list_extra_info {
+ my $self = shift;
+ return {
+ Args => $self->normalized_arg_number,
+ CaptureArgs => $self->number_of_captures,
+ }
+}
-=cut
+__PACKAGE__->meta->make_immutable;
-sub new { # Dumbass constructor
- my ( $class, $attrs ) = @_;
- return bless { %{ $attrs || {} } }, $class;
-}
+1;
+
+__END__
+
+=head1 METHODS
+
+=head2 attributes
+
+The sub attributes that are set for this action, like Local, Path, Private
+and so on. This determines how the action is dispatched to.
+
+=head2 class
+
+Returns the name of the component where this action is defined.
+Derived by calling the L<catalyst_component_name|Catalyst::Component/catalyst_component_name>
+method on each component.
+
+=head2 code
+
+Returns a code reference to this action.
+
+=head2 dispatch( $c )
+
+Dispatch this action against a context.
+
+=head2 execute( $controller, $c, @args )
+
+Execute this action's coderef against a given controller with a given
+context and arguments
+
+=head2 match( $c )
+
+Check Args attribute, and makes sure number of args matches the setting.
+Always returns true if Args is omitted.
+
+=head2 match_captures ($c, $captures)
+
+Can be implemented by action class and action role authors. If the method
+exists, then it will be called with the request context and an array reference
+of the captures for this action.
+
+Returning true from this method causes the chain match to continue, returning
+makes the chain not match (and alternate, less preferred chains will be attempted).
+
+=head2 match_args($c, $args)
+
+Underlying feature that does the 'match' work, but doesn't require a context to
+work (like 'match' does.).
-=back
+=head2 resolve_type_constraint
-=head1 AUTHOR
+Trys to find a type constraint if you have on on a type constrained method.
-Matt S. Trout
+=head2 compare
+
+Compares 2 actions based on the value of the C<Args> attribute, with no C<Args>
+having the highest precedence.
+
+=head2 namespace
+
+Returns the private namespace this action lives in.
+
+=head2 reverse
+
+Returns the private path for this action.
+
+=head2 private_path
+
+Returns absolute private path for this action. Unlike C<reverse>, the
+C<private_path> of an action is always suitable for passing to C<forward>.
+
+=head2 name
+
+Returns the sub name of this action.
+
+=head2 number_of_args
+
+Returns the number of args this action expects. This is 0 if the action doesn't
+take any arguments and undef if it will take any number of arguments.
+
+=head2 normalized_arg_number
+
+For the purposes of comparison we normalize 'number_of_args' so that if it is
+undef we mean ~0 (as many args are we can think of).
+
+=head2 number_of_captures
+
+Returns the number of captures this action expects for L<Chained|Catalyst::DispatchType::Chained> actions.
+
+=head2 list_extra_info
+
+A HashRef of key-values that an action can provide to a debugging screen
+
+=head2 scheme
+
+Any defined scheme for the action
+
+=head2 meta
+
+Provided by Moose.
+
+=head1 AUTHORS
+
+Catalyst Contributors, see Catalyst.pm
=head1 COPYRIGHT
-This program is free software, you can redistribute it and/or modify it under
+This library is free software. You can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
-1;
+
projects / catagits/Catalyst-Runtime.git / blobdiff