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package xyz.driver
import scalaz.{Equal, Monad, OptionT}
import eu.timepit.refined.api.{Refined, Validate}
import eu.timepit.refined.collection.NonEmpty
import xyz.driver.core.rest.errors.ExternalServiceException
import scala.concurrent.{ExecutionContext, Future}
// TODO: this package seems too complex, look at all the features we need!
import scala.language.reflectiveCalls
import scala.language.higherKinds
import scala.language.implicitConversions
package object core {
def make[T](v: => T)(f: T => Unit): T = {
val value = v
f(value)
value
}
def using[R <: { def close() }, P](r: => R)(f: R => P): P = {
val resource = r
try {
f(resource)
} finally {
resource.close()
}
}
object tagging {
private[core] trait Tagged[+V, +Tag]
implicit class Taggable[V <: Any](val v: V) extends AnyVal {
def tagged[Tag]: V @@ Tag = v.asInstanceOf[V @@ Tag]
}
}
type @@[+V, +Tag] = V with tagging.Tagged[V, Tag]
implicit class OptionTExtensions[H[_]: Monad, T](optionTValue: OptionT[H, T]) {
def returnUnit: H[Unit] = optionTValue.fold[Unit](_ => (), ())
def continueIgnoringNone: OptionT[H, Unit] =
optionTValue.map(_ => ()).orElse(OptionT.some[H, Unit](()))
def subflatMap[B](f: T => Option[B]): OptionT[H, B] =
OptionT.optionT[H](implicitly[Monad[H]].map(optionTValue.run)(_.flatMap(f)))
}
implicit class MonadicExtensions[H[_]: Monad, T](monadicValue: H[T]) {
private implicit val monadT = implicitly[Monad[H]]
def returnUnit: H[Unit] = monadT(monadicValue)(_ => ())
def toOptionT: OptionT[H, T] =
OptionT.optionT[H](monadT(monadicValue)(value => Option(value)))
def toUnitOptionT: OptionT[H, Unit] =
OptionT.optionT[H](monadT(monadicValue)(_ => Option(())))
}
implicit class FutureExtensions[T](future: Future[T]) {
def passThroughExternalServiceException(implicit executionContext: ExecutionContext): Future[T] =
future.transform(identity, {
case ExternalServiceException(_, _, Some(e)) => e
case t: Throwable => t
})
}
}
package core {
final case class Id[+Tag](value: String) extends AnyVal {
@inline def length: Int = value.length
override def toString: String = value
}
@SuppressWarnings(Array("org.wartremover.warts.ImplicitConversion"))
object Id {
implicit def idEqual[T]: Equal[Id[T]] = Equal.equal[Id[T]](_ == _)
implicit def idOrdering[T]: Ordering[Id[T]] = Ordering.by[Id[T], String](_.value)
sealed class Mapper[E, R] {
def apply[T >: E](id: Id[R]): Id[T] = Id[E](id.value)
def apply[T >: R](id: Id[E])(implicit dummy: DummyImplicit): Id[T] = Id[R](id.value)
}
object Mapper {
def apply[E, R] = new Mapper[E, R]
}
implicit def convertRE[R, E](id: Id[R])(implicit mapper: Mapper[E, R]): Id[E] = mapper[E](id)
implicit def convertER[E, R](id: Id[E])(implicit mapper: Mapper[E, R]): Id[R] = mapper[R](id)
}
final case class Name[+Tag](value: String) extends AnyVal {
@inline def length: Int = value.length
override def toString: String = value
}
object Name {
implicit def nameEqual[T]: Equal[Name[T]] = Equal.equal[Name[T]](_ == _)
implicit def nameOrdering[T]: Ordering[Name[T]] = Ordering.by(_.value)
implicit def nameValidator[T, P](implicit stringValidate: Validate[String, P]): Validate[Name[T], P] = {
Validate.instance[Name[T], P, stringValidate.R](
name => stringValidate.validate(name.value),
name => stringValidate.showExpr(name.value))
}
}
final case class NonEmptyName[+Tag](value: String Refined NonEmpty) {
@inline def length: Int = value.value.length
override def toString: String = value.value
}
object NonEmptyName {
implicit def nonEmptyNameEqual[T]: Equal[NonEmptyName[T]] =
Equal.equal[NonEmptyName[T]](_.value.value == _.value.value)
implicit def nonEmptyNameOrdering[T]: Ordering[NonEmptyName[T]] = Ordering.by(_.value.value)
}
final case class Revision[T](id: String)
object Revision {
implicit def revisionEqual[T]: Equal[Revision[T]] = Equal.equal[Revision[T]](_.id == _.id)
}
final case class Base64(value: String)
trait Trimmed
object Trimmed {
import tagging._
implicit def string2Trimmed(str: String): String @@ Trimmed = str.trim().tagged[Trimmed]
implicit def name2Trimmed[T](name: Name[T]): Name[T] @@ Trimmed = Name[T](name.value.trim()).tagged[Trimmed]
}
}
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