Module: Petra::Util::ExtendedAttributeAccessors::ClassMethods

Defined in:
lib/petra/util/extended_attribute_accessors.rb

Instance Method Summary collapse

Instance Method Details

#extended_attr_accessor(name, **options) ⇒ Object

TODO: Keep track of available accessors on class level TODO: Keep track of the actual values on instance (or class instance) level



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# File 'lib/petra/util/extended_attribute_accessors.rb', line 16

def extended_attr_accessor(name, **options)
  singleton = options.fetch(:singleton, false)
  methods_method, definer_method = :instance_methods, :define_method
  methods_method, definer_method = :singleton_methods, :define_singleton_method if singleton

  unless send(methods_method).include?(:extended_attribute_accessors)
    send(definer_method, :__extended_attribute_accessors__) do |group = :general|
      (@extended_attribute_accessors ||= {})[group.to_sym] ||= {}
    end

    send(definer_method, :extended_attribute_accessors) do |group = :general, only: nil|
      result = __extended_attribute_accessors__(group)
      return result unless only

      result.each_with_object({}) do |(k, v), h|
        h[k] = v.slice(Array(only).map(:to_sym))
      end
    end
  end

  group = options.fetch(:group, :general)

  send(definer_method, name) do
    accessor = extended_attribute_accessors(group)[name.to_sym] || {}
    accessor[:value] || accessor[:default]
  end

  define_method("#{name}=") do |value|
    self[name] = value
  end
end