Contents

# frozen_string_literal: true

require "pakyow/support/extension"
require "pakyow/support/inflector"

module Pakyow
  module Behavior
    # Helps manage isolated classes for an app.
    #
    module Isolating
      extend Support::Extension

      class_methods do
        # Creates a subclass within the app's namespace.
        #
        # @example
        #   class MyApp < Pakyow::App
        #     isolate Pakyow::Controller do
        #       def self.special_behavior
        #         puts "it works"
        #       end
        #     end
        #   end
        #
        #   MyApp::Controller.special_behavior
        #   => it works
        #
        #   Pakyow::Controller
        #   => NoMethodError (undefined method `special_behavior' for Pakyow::Controller:Class)
        #
        def isolate(class_to_isolate, &block)
          isolated_class_name = Support.inflector.demodulize(class_to_isolate.to_s).to_sym

          unless const_defined?(isolated_class_name, false)
            const_set(isolated_class_name, Class.new(class_to_isolate))
          end

          isolated(isolated_class_name).tap do |defined_subclass|
            defined_subclass.class_eval(&block) if block_given?
          end
        end

        # Returns true if the class name is isolated.
        #
        def isolated?(class_name)
          const_defined?(class_name)
        end

        # Returns the isolated class, evaluating the block (if provided).
        #
        def isolated(class_name, &block)
          if isolated?(class_name)
            const_get(class_name).tap do |isolated_class|
              isolated_class.class_eval(&block) if block_given?
            end
          else
            nil
          end
        end
      end

      # Convenience method for +Pakyow::App::subclass+.
      #
      def isolated(*args, &block)
        self.class.isolated(*args, &block)
      end
    end
  end
end

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
pakyow-core-1.0.0.rc5	lib/pakyow/behavior/isolating.rb
pakyow-core-1.0.0.rc4	lib/pakyow/behavior/isolating.rb
pakyow-core-1.0.0.rc3	lib/pakyow/behavior/isolating.rb
pakyow-core-1.0.0.rc2	lib/pakyow/behavior/isolating.rb
pakyow-core-1.0.0.rc1	lib/pakyow/behavior/isolating.rb