Event payload to protobuf code

[maguro]

We have some code that translates the GitLab Golang event payloads to their protobuf equivalent. Would you be interested in including it?

[deankarn]

I would definitely be interested in including the option for sure, send me some examples, references ect. and we'll see how it could be integrated :)

[maguro]

Here's a rough sketch of what I've been using

type converter func(payload interface{}) (proto.Message, error)

var converters map[reflect.Type]converter

func init() {
    converters = make(map[reflect.Type]converter)

    converters[reflect.TypeOf(gitlab.IssueEventPayload{})] = func(payload interface{}) (proto.Message, error) {
        issue := payload.(gitlab.IssueEventPayload)
        return NewIssueEventPayload(issue)
    }
}

func ToMessage(payload interface{}) (proto.Message, error) {
    pType := reflect.TypeOf(payload)
    convert, ok := converters[pType]
    if !ok {
        return nil, errors.Errorf("Unable to find converter for %s", pType)
    }
    return convert(payload)
}

[maguro]

I'll assume that this is ok.

[maguro]

I'm also adding a NewMessage() function to facilitate the deserialization of messages serialized in Any:

func NewMessage(typeUrl string) (proto.Message, error) {
	mType, ok := anyTypes[typeUrl]
	if !ok {
		return nil, errors.Errorf("Unable to find Message constructor for type URL %s", typeUrl)
	}
	return reflect.New(mType).Interface().(proto.Message), nil
}

The resulting instance could then be used with ptypes.UnmarshalAny().