import java.time.Instant

/**
  * Created by aloise on 01.09.16.
  */
case class User( name:String, email:String, password:String, createdAt:Instant )

class WithId[T <: Product ]( val id: Int, val value: T ) extends Product {


  override def productElement(n: Int): Any = n match {
    case 0 => id
    case _ => value.productElement( n - 1 )
  }

  override def productArity: Int = 1 + value.productArity

  override def canEqual(that: Any): Boolean = {
    that match {
      case value1: this.type =>
        value1.canEqual(this) && ( value1.id == this.id )
      case _ =>
        false
    }
  }
}


object WithIdHelper {


  class WithIdRichHelper[T<:Product](value:T) {

    def withId( id: Int ): WithId[T] = {
      new WithId[T](id, value)
    }
  }

  implicit def toProduct[T<:Product]( withIdClass:WithId[T] ):T = {
    withIdClass.value
  }

  implicit def liftToWithId[T<:Product](value:T):WithIdRichHelper[T] = {
    new WithIdRichHelper[T](value)
  }

}

object CaseClassTests {
  def main(args: Array[String]): Unit = {

    import WithIdHelper.{  toProduct, liftToWithId }

    val user = User("aloise","test", "password", Instant.now())

    val userWithId = user withId 5

    println( userWithId.id, userWithId.name, userWithId.email )

  }
}