MooseX::AttributeHelpers::Trait::Counter

diff --git a/lib/MooseX/AttributeHelpers/Trait/Counter.pm b/lib/MooseX/AttributeHelpers/Trait/Counter.pm
new file mode 100644 (file)
index 0000000..d402f13
--- /dev/null
+++ b/lib/MooseX/AttributeHelpers/Trait/Counter.pm
@@ -0,0 +1,56 @@
+
+package MooseX::AttributeHelpers::Trait::Counter;
+use Moose::Role;
+
+with 'MooseX::AttributeHelpers::Trait::Base'
+  => { excludes => ['method_provider'] };
+
+our $VERSION   = '0.03';
+our $AUTHORITY = 'cpan:STEVAN';
+
+use MooseX::AttributeHelpers::MethodProvider::Counter;
+
+has 'method_provider' => (
+    is        => 'ro',
+    isa       => 'ClassName',
+    predicate => 'has_method_provider',
+    default   => 'MooseX::AttributeHelpers::MethodProvider::Counter',
+);
+
+sub helper_type { 'Num' }
+
+before 'process_options_for_provides' => sub {
+    my ($self, $options, $name) = @_;
+
+    # Set some default attribute options here unless already defined
+    if ((my $type = $self->helper_type) && !exists $options->{isa}){
+        $options->{isa} = $type;
+    }
+
+    $options->{is}      = 'ro' unless exists $options->{is};
+    $options->{default} = 0    unless exists $options->{default};
+};
+
+after 'check_provides_values' => sub {
+    my $self     = shift;
+    my $provides = $self->provides;
+
+    unless (scalar keys %$provides) {
+        my $method_constructors = $self->method_constructors;
+        my $attr_name           = $self->name;
+
+        foreach my $method (keys %$method_constructors) {
+            $provides->{$method} = ($method . '_' . $attr_name);
+        }
+    }
+};
+
+no Moose::Role;
+
+# register the alias ...
+package # hide me from search.cpan.org
+    Moose::Meta::Attribute::Custom::Trait::Counter;
+sub register_implementation { 'MooseX::AttributeHelpers::Trait::Counter' }
+
+1;
+