module Shippinglogic
  class FedEx
    # This module is more for application integration, so you can do something like:
    #
    #   tracking = fedex.tracking
    #   if tracking.valid?
    #     # render a successful response
    #   else
    #     # do something with the errors: fedex.errors
    #   end
    module Validation
      # Just an array of errors that were encounted if valid? returns false.
      def errors
        @errors ||= []
      end
      
      # Allows you to determine if the request is valid or not. All validation is delegated to the FedEx
      # services, so what this does is make a call to FedEx and rescue any errors, then it puts those
      # error into the 'errors' array.
      def valid?
        begin
          target
          true
        rescue Error => e
          errors.clear
          self.errors << e.message
          false
        end
      end
    end
  end
end