Module: Ghaki::App::Mixable::ClassMethods

Defined in:
lib/ghaki/app/mixable.rb

Overview

Examples

require 'ghaki/app/plugin'
require 'ghaki/app/mixer'

class Duck
  attr_accessor :quack
end

class DuckApp < Ghaki::App::Plugin
  app_plugin_accessor Duck, :duck
end

class DuckMixin
   include Ghaki::App::Mixable
   app_mixin_accessor DuckApp, :duck
end

class UsingDuck
  include DuckMixin
  def quacker
    duck.quack = true
  end
end

Instance Method Summary collapse

Instance Method Details

#app_mixin_accessor(klass, source, target = source) ⇒ Object

Generate attribute reader and writer.



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# File 'lib/ghaki/app/mixable.rb', line 65

def app_mixin_accessor klass, source, target=source
  app_mixin_reader klass, source, target
  app_mixin_writer target
end

#app_mixin_reader(klass, source, target = source) ⇒ Object

Generate mixin attribute reader. Uses the singleton copy unless overwritten by the writer.



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# File 'lib/ghaki/app/mixable.rb', line 35

def app_mixin_reader klass, source, target=source
  if klass.respond_to?(:instance)
    class_eval <<-"END"
      def #{target}
        @#{target} ||= #{klass}.instance.#{source}
      end
    END
    func = :instance
  elsif klass.respond_to?(:new)
    class_eval <<-"END"
      def #{target}
        @#{target} ||= #{klass}.new
      end
    END
  else
    raise ArgumentError, "Unknown Constructor: #{klass}"
  end
end

#app_mixin_writer(target) ⇒ Object

Generate mixin attribute writer. Allows the local copy of the singleton value to be overriden.



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# File 'lib/ghaki/app/mixable.rb', line 57

def app_mixin_writer target
  class_exec do
    attr_writer target
  end
end