Scala-Play-Slick-Demo/app/util/Util.scala

package util

import scala.concurrent.Future
import cats.effect.IO
import cats.implicits._
import scala.util.Success
import scala.util.Failure
import cats.effect.Effect
import play.api.mvc._
import scala.concurrent.ExecutionContext

object IOHttp {

  /**
    * Actions to convert an effect wrapper F such as cats IO
    * or monix Task into a future implicitly
    *
    * @param ab
    */
  implicit class ActionBuilderOps[+R[_], B](ab: ActionBuilder[R, B]) {

    import cats.effect.implicits._

    /**
      * Action to convert an effect wrapper F such as cats IO
      * or monix Task into a future implicitly
      *
      * @param ab
      */
    def asyncFR[F[_]: Effect](cb: R[B] => F[Result]): Action[B] = ab.async {
      c => cb(c).toIO.unsafeToFuture()
    }

    /**
      * Action to convert an effect wrapper F such as cats IO
      * or monix Task into a future implicitly
      *
      * @param ab
      */
    def asyncF[F[_]: Effect](cb: => F[Result]): Action[AnyContent] =
      ab.async { cb.toIO.unsafeToFuture() }

  }
}

object RepoUtil {
  def fromFuture[IOEffect[A], A](
      f: => Future[A]
  )(implicit ec: ExecutionContext): IO[A] =
    IO.delay(f) >>= (f =>
      IO.async[A] { cb =>
        f.onComplete {
          case Success(a)  => cb(Right(a))
          case Failure(ex) => cb(Left(ex))
        }
      }
    )
}