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package Net::HTTP::Spore::Role::Middleware;
use Moose::Role;
use Scalar::Util qw/blessed/;
has middlewares => (
is => 'rw',
isa => 'ArrayRef',
traits => ['Array'],
lazy => 1,
default => sub { [] },
auto_deref => 1,
handles => { _add_middleware => 'push', _filter_middlewares => 'grep' },
);
sub _load_middleware {
my ( $self, $mw, $cond, @args ) = @_;
Class::MOP::load_class($mw) unless blessed($mw);
my $code = $mw->wrap( $cond, @args );
$self->_trace_msg('== enabling middleware %s', $mw);
$self->_add_middleware($code);
}
sub _complete_mw_name {
my ($self, $mw) = @_;
if ($mw =~ /^\+/) {
$mw =~ s/^\+//;
}
elsif ($mw !~ /Net\:\:HTTP\:\:Spore\:\:Middleware/) {
$mw = "Net::HTTP::Spore::Middleware::".$mw;
}
return $mw;
}
sub enable {
my ($self, $mw, @args) = @_;
confess "middleware name is missing" unless $mw;
$self->enable_if(sub{1}, $mw, @args);
$self;
}
sub enable_if {
my ($self, $cond, $mw, @args) = @_;
confess "condition must be a code ref" if (!$cond || ref $cond ne 'CODE');
if(ref($mw) eq 'CODE'){ # anonymous middleware
Class::MOP::load_class('Net::HTTP::Spore::Middleware');
my $anon = Class::MOP::Class->create_anon_class(
superclasses => ['Net::HTTP::Spore::Middleware'],
methods => {
call => $mw
}
);
$mw = $anon->new_object;
} else {
$mw = $self->_complete_mw_name($mw);
}
$self->_load_middleware($mw, $cond, @args);
$self;
}
sub reset_middlewares {
my $self = shift;
$self->middlewares([]);
}
1;
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