Service & Status Objects

delete_app.rb

class Core::DeleteApp < Core::ServiceBase
  attr_reader :user, :app

  def initialize(user, app)
    @user = user
    @app = app
  end

  # Her service object'te sadece bir tane public method var o da `call` methodu.
  # `call` methodu bir status object dondurur, bu status object `Error` veya `Success` status object olsun.
  def call
    if app.destroy
      send_email_to_user(user)
      success(app: app, user: user)
    else
      error('Error message', app)
    end
  end

  private
  
  def send_email_to_user(user)
    Notifier.notify_user(user).deliver_later
  end

end

error.rb

module Core
  module Status
    class Error
      attr_reader :error, :data

      # Initilizes an Error object
      #
      # @param error [String] Error message
      # @param error_data [Object] Object or objects which you need to return along with the error message.
      def initialize(error, data = nil)
        @error = error
        @data = data
      end

      def success?
        false
      end

      def errors
        @error
      end

    end
  end
end

service_base.rb

class Core::ServiceBase

  protected

  def error(error_message, error_data = nil)
    Core::Status::Error.new(error_message, error_data)
  end

  def success(data = nil)
    Core::Status::Success.new(data)
  end

end

success.rb

module Core
  module Status
    class Success
      attr_reader :data

      def initialize(data)
        @data = data
      end

      def success?
        true
      end

    end
  end
end