krystal/go-katapult

package buildspec //nolint:dupl

import (
    "encoding/xml"
    "fmt"
)

type IPAddress struct {
    ID      string `json:"id,omitempty" yaml:"id,omitempty"`
    Address string `json:"address,omitempty" yaml:"address,omitempty"`
}

func (s *IPAddress) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
    x := &xmlIPAddress{}

    switch {
    case s.ID != "":
        x.Value = s.ID
    case s.Address != "":
        x.By = address
        x.Value = s.Address
    }

    return e.EncodeElement(x, start)
}

func (s *IPAddress) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
    x := &xmlIPAddress{}
    _ = d.DecodeElement(x, &start)

    v := IPAddress{}

    switch {
    case x.By == "":
        v.ID = x.Value
    case x.By == address:
        v.Address = x.Value
    default:
        return fmt.Errorf(
            `%w: IPAddress by="%s" is not supported`, ErrParseXML, x.By,
        )
    }

    *s = v

    return nil
}

type xmlIPAddress xmlLookupElem