export type Validator<T> = (value: T) => string

const checkEmail: Validator<string> = (value) => {
  const isEmailValidEx =
    /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
  return isEmailValidEx.test(value.toLowerCase()) ? '' : 'error-email-invalid'
}

const checkPhoneNumber: Validator<string> = (phone) => {
  const isPhoneValidEx = /^[6789]{1}[0-9]{8}$/g
  return isPhoneValidEx.test(phone) ? '' : 'error-phone-invalid'
}

export default {
  checkPhoneNumber,
  checkEmail,
}