42Atomys/webhooked

package valuable

import (
    "reflect"

    "github.com/mitchellh/mapstructure"
)

// Decode decodes the given data into the given result.
// In case of the target Type if a Valuable, we serialize it with
// `SerializeValuable` func.
// @param input is the data to decode
// @param output is the result of the decoding
// @return an error if the decoding failed
func Decode(input, output interface{}) (err error) {
    var decoder *mapstructure.Decoder

    decoder, err = mapstructure.NewDecoder(&mapstructure.DecoderConfig{
        Result:     output,
        DecodeHook: valuableDecodeHook,
    })
    if err != nil {
        return err
    }

    return decoder.Decode(input)
}

// valuableDecodeHook is a mapstructure.DecodeHook that serializes
// the given data into a Valuable.
func valuableDecodeHook(f reflect.Type, t reflect.Type, data interface{}) (interface{}, error) {
    if t != reflect.TypeOf(Valuable{}) {
        return data, nil
    }

    return SerializeValuable(data)
}