kurz/domain/domain_api.go

package domain

import "errors"

func GetTargetURL(shortURL string) (target string, err error) {
	su := ShortURL{URL: URL(shortURL)}
	tu, err := shortURLRepository.GetTarget(su)
	if err != nil {
		target = ""
	} else {
		target = string(tu.URL)
	}

	return
}

func GetShortURL(targetURL string) (short string, isNew bool, err error) {
	tu := TargetURL{URL: URL(targetURL)}
	if tu.IsEmpty() {
		// Zero values are OK for short and isNew.
		err = errors.New("Empty target is not valid")
		return
	}
	su, isNew, err := targetURLRepository.GetShort(tu)
	if err == nil {
		short = string(su.URL)
	}

	return
}