tylerhunt

require 'delegate'

# An abstract decorator useful for decorating Active Record objects.
class ActiveRecordDecorator < SimpleDelegator
  # A proxy for the decorator class to allow the delegation of certain class
  # methods to the decorated object's class.
  class ClassProxy < SimpleDelegator
    def initialize(decorator_class, decorated_class)
      super decorator_class
      self.decorated_class = decorated_class

longlostnick

# (v.respond_to?(:empty?) ? v.empty? : !v) is basically rails' .blank? in plain ruby
class Hash
  def delete_blank
    delete_if do |k, v|
      (v.respond_to?(:empty?) ? v.empty? : !v) or v.instance_of?(Hash) && v.delete_blank.empty?
    end
  end
end