spells.LocationAwarePropertyModule.scala Maven / Gradle / Ivy

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This is a small scala "util" library, which will hopefully grow over time.

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package spells

private[spells] trait LocationAwarePropertyModule {
  this: StylePrintModule with AnsiModule =>

  abstract class LocationAwareProperty[T](implicit materialised: (LocationAwareProperty[T] => T)) {
    final lazy val value: T = materialised(this)

    def isValid(in: T): Boolean = true
    def validationErrorMessage(in: T): String = styled {
      val errorMessage = s"SpellsConfig contains a property: ${location.yellow} with an illegal value: ${in.yellow}"
      val customErrorMessage = customValidationErrorMessage(in)

      if (customErrorMessage.isEmpty) errorMessage
      else errorMessage + ": " + customErrorMessage
    }(AnsiStyle.Red)

    def customValidationErrorMessage(in: T): String = ""

    final lazy val location: String =
      scala.reflect.NameTransformer
        .decode(getClass.getName)
        .replace("SpellsConfigModule$SpellsConfig$", "")
        .split('$')
        .mkString(".")

    override final def toString: String = value.toString
  }
}