sketch for Matt Wynne

sketch.rb

class RubbishController
  protected
  def redirect_to(path)
    puts "redirecting_to #{path}"
  end

  def render(renderable)
    puts "rendering #{renderable}"
  end
  def current_user
    Object.new
  end
  def organizations_path(org)
    "/organizations/#{org.to_param}"
  end
end

class ValidationError < RuntimeError
end

class IgnorePrivate
  def initialize(thing)
    @thing = thing
  end
  def method_missing(message, *args, &block)
    @thing.send(message, *args, &block)
  end
end

class Organization
  def to_param
    "42"
  end

  def save!
    if rand > 0.5
      raise ValidationError
    end
  end
end

class OrganizationCreator
  def initialize(ui)
    @ui = ui
  end

  def create_for(user, org_name)
    # real creation logic here
    begin
      organization = Organization.new
      organization.save!
      @ui.organization_creation_succeeded(organization)

    rescue ValidationError
      @ui.organization_creation_failed(organization)
    end
  end
end

class OrganizationCreationFeedback
  def initialize(controller)
    @controller = controller
  end

  def organization_creation_succeeded(org)
    @controller.redirect_to(@controller.organizations_path(org))
  end

  def organization_creation_failed(org)
    @controller.render(:error)
  end
end

class OrganizationsController < RubbishController
  def create
    params = { organization: 'Hello' }
    feedback = OrganizationCreationFeedback.new(IgnorePrivate.new(self))
    creator = OrganizationCreator.new(feedback)
    creator.create_for(current_user, params[:organization])
  end
end

controller = OrganizationsController.new
controller.create