change_device.rb

class Smartphone::Contract::ChangeDevice < BaseInteraction  
  def call
    return unless valid_interaction? 
    persist_models!
    return unless changed_certificate.success?
    check_imei_async
    notify_user
  end
  
  def valid_interaction?
    not_suspended?
      && invoices_settled?
      && current_device_misatch_previous?
      && previous_attributes_valid?
      && new_attributes_valid?
      && suspended_subscription.success?
  end
    
  def not_suspended?
    # 
  end
  
  def invoices_settled?
    #
  end
  
  def current_device_misatch_previous?
    #
  end
  
  def previous_attributes_valid?
    #
  end
  
  def new_attributes_valid?
    #
  end
  
  def suspended_subscription
    #
  end
  
  def changed_certificate
    #
  end
  
  def check_imei_async
    #
  end
  
  def notify_user
    #
  end
  
  def persist_models!
    #
  end
end