go_fixes_bug_5452_xml_omitempty.go

// +build !go1.8

package braintree

import "encoding/xml"

// The functions in this file are required because of a bug in versions of go prior to go1.8.
// The bug was reported at https://github.com/golang/go/issues/5452 and fixed in
// https://github.com/golang/go/commit/daa121167b6ce630aba00195f1c3872cda39a50c.
//
// In versions prior to go1.8 the XML encoder did not include pointer fields that were non-nil
// if the field pointed to a value that was the default value for the pointed to type.
//
// To serialize the bool false value when it is set on `VerifyCard`, we must manually control
// if it is serialized or not.

func (cco *CreditCardOptions) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	if cco.VerifyCard == nil {
		type excludeVerifyCard struct {
			VerifyCard                    *bool  `xml:"-"`
			VenmoSDKSession               string `xml:"venmo-sdk-session,omitempty"`
			MakeDefault                   bool   `xml:"make-default,omitempty"`
			FailOnDuplicatePaymentMethod  bool   `xml:"fail-on-duplicate-payment-method,omitempty"`
			VerificationMerchantAccountId string `xml:"verification-merchant-account-id,omitempty"`
			UpdateExistingToken           string `xml:"update-existing-token,omitempty"`
		}
		return e.EncodeElement(
			excludeVerifyCard{
				VerifyCard:                    cco.VerifyCard,
				VenmoSDKSession:               cco.VenmoSDKSession,
				MakeDefault:                   cco.MakeDefault,
				FailOnDuplicatePaymentMethod:  cco.FailOnDuplicatePaymentMethod,
				VerificationMerchantAccountId: cco.VerificationMerchantAccountId,
				UpdateExistingToken:           cco.UpdateExistingToken,
			},
			start,
		)
	} else {
		type includeVerifyCard struct {
			VerifyCard                    *bool  `xml:"verify-card"`
			VenmoSDKSession               string `xml:"venmo-sdk-session,omitempty"`
			MakeDefault                   bool   `xml:"make-default,omitempty"`
			FailOnDuplicatePaymentMethod  bool   `xml:"fail-on-duplicate-payment-method,omitempty"`
			VerificationMerchantAccountId string `xml:"verification-merchant-account-id,omitempty"`
			UpdateExistingToken           string `xml:"update-existing-token,omitempty"`
		}
		return e.EncodeElement(
			includeVerifyCard{
				VerifyCard:                    cco.VerifyCard,
				VenmoSDKSession:               cco.VenmoSDKSession,
				MakeDefault:                   cco.MakeDefault,
				FailOnDuplicatePaymentMethod:  cco.FailOnDuplicatePaymentMethod,
				VerificationMerchantAccountId: cco.VerificationMerchantAccountId,
				UpdateExistingToken:           cco.UpdateExistingToken,
			},
			start,
		)
	}
}

func (pmo *PaymentMethodRequestOptions) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	if pmo.VerifyCard == nil {
		type excludeVerifyCard struct {
			MakeDefault                   bool   `xml:"make-default,omitempty"`
			FailOnDuplicatePaymentMethod  bool   `xml:"fail-on-duplicate-payment-method,omitempty"`
			VerifyCard                    *bool  `xml:"-"`
			VerificationMerchantAccountId string `xml:"verification-merchant-account-id,omitempty"`
		}
		return e.EncodeElement(
			excludeVerifyCard{
				MakeDefault:                   pmo.MakeDefault,
				FailOnDuplicatePaymentMethod:  pmo.FailOnDuplicatePaymentMethod,
				VerifyCard:                    pmo.VerifyCard,
				VerificationMerchantAccountId: pmo.VerificationMerchantAccountId,
			},
			start,
		)
	} else {
		type includeVerifyCard struct {
			MakeDefault                   bool   `xml:"make-default,omitempty"`
			FailOnDuplicatePaymentMethod  bool   `xml:"fail-on-duplicate-payment-method,omitempty"`
			VerifyCard                    *bool  `xml:"verify-card"`
			VerificationMerchantAccountId string `xml:"verification-merchant-account-id,omitempty"`
		}
		return e.EncodeElement(
			includeVerifyCard{
				MakeDefault:                   pmo.MakeDefault,
				FailOnDuplicatePaymentMethod:  pmo.FailOnDuplicatePaymentMethod,
				VerifyCard:                    pmo.VerifyCard,
				VerificationMerchantAccountId: pmo.VerificationMerchantAccountId,
			},
			start,
		)
	}
}