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package Dancer2::Core::Role::DSL;
# ABSTRACT: Role for DSL
$Dancer2::Core::Role::DSL::VERSION = '0.152000';
use Moo::Role;
use Dancer2::Core::Types;
use Carp 'croak';
with 'Dancer2::Core::Role::Hookable';
has app => ( is => 'ro', required => 1 );
has keywords => (
is => 'rw',
isa => HashRef,
lazy => 1,
builder => '_build_dsl_keywords',
);
sub supported_hooks { }
sub _build_dsl_keywords {
my ($self) = @_;
$self->can('dsl_keywords')
? $self->dsl_keywords
: {};
}
sub register {
my ( $self, $keyword, $is_global ) = @_;
my $keywords = $self->keywords;
my $pkg = ref($self);
$pkg =~ s/__WITH__.+$//;
if ( exists $keywords->{$keyword} ) {
my $reg_pkg = $keywords->{$keyword}{'pkg'};
$reg_pkg =~ s/__WITH__.+$//;
$reg_pkg eq $pkg and return;
croak "[$pkg] Keyword $keyword already registered by $reg_pkg";
}
$keywords->{$keyword} = { is_global => $is_global, pkg => $pkg };
}
sub dsl { $_[0] }
# exports new symbol to caller
sub export_symbols_to {
my ( $self, $caller, $args ) = @_;
my $exports = $self->_construct_export_map($args);
foreach my $export ( keys %{$exports} ) {
no strict 'refs';
my $existing = *{"${caller}::${export}"}{CODE};
next if defined $existing;
*{"${caller}::${export}"} = $exports->{$export};
}
return keys %{$exports};
}
# private
sub _compile_keyword {
my ( $self, $keyword, $is_global ) = @_;
my $compiled_code = sub { $self->$keyword(@_); };
if ( !$is_global ) {
my $code = $compiled_code;
$compiled_code = sub {
$self->app->has_request or
croak "Function '$keyword' must be called from a route handler";
$code->(@_);
};
}
return $compiled_code;
}
sub _construct_export_map {
my ( $self, $args ) = @_;
my $keywords = $self->keywords;
my %map;
foreach my $keyword ( keys %$keywords ) {
# check if the keyword were excluded from importation
$args->{ '!' . $keyword } and next;
$map{$keyword} = $self->_compile_keyword( $keyword, $keywords->{$keyword}{is_global} );
}
return \%map;
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Dancer2::Core::Role::DSL - Role for DSL
=head1 VERSION
version 0.152000
=head1 AUTHOR
Dancer Core Developers
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2014 by Alexis Sukrieh.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
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