import svalidate._
import svalidate.validator.NonEmptyString

case class UserData(id: Int, email: String, firstName: String, lastName: String)

val nameValidation = form[UserData](
  Validation("firstName", _.firstName, NonEmptyString),
  Validation("lastName",  _.lastName,  NonEmptyString)
)

// no errors
val jSparrow = UserData(1, "[email protected]", "Jack", "Sparrow")
val res1 = nameValidation(jSparrow)
// returns:
// Map() 

// some errors
val invalidUserData = UserData(0, "", "", "")
val res2 = nameValidation(invalidUserData)
// Map(
//   firstName -> List(The field %s must not be empty),
//   lastName -> List(The field %s must not be empty)
// )