crystal.react.syntax.pot.scala Maven / Gradle / Ivy
// Copyright (c) 2016-2023 Association of Universities for Research in Astronomy, Inc. (AURA)
// For license information see LICENSE or https://opensource.org/licenses/BSD-3-Clause
package crystal.react.syntax
import crystal.*
import japgolly.scalajs.react.*
import japgolly.scalajs.react.vdom.html_<^.*
trait pot {
extension [A](pot: Pot[A])
def renderPending(f: => VdomNode): VdomNode =
pot match
case Pot.Pending => f
case _ => EmptyVdom
def renderError(f: Throwable => VdomNode): VdomNode =
pot match
case Pot.Error(t) => f(t)
case _ => EmptyVdom
def renderReady(f: A => VdomNode): VdomNode =
pot match
case Pot.Ready(a) => f(a)
case _ => EmptyVdom
given Reusability[Throwable] = Reusability.byRef[Throwable]
given [A: Reusability]: Reusability[Pot[A]] =
Reusability((x, y) =>
x match
case Pot.Pending =>
y match
case Pot.Pending => true
case _ => false
case Pot.Error(tx) =>
y match
case Pot.Error(ty) => tx ~=~ ty
case _ => false
case Pot.Ready(ax) =>
y match
case Pot.Ready(ay) => ax ~=~ ay
case _ => false
)
given [A: Reusability]: Reusability[PotOption[A]] =
Reusability((x, y) =>
x match
case PotOption.Pending =>
y match
case PotOption.Pending => true
case _ => false
case PotOption.Error(tx) =>
y match
case PotOption.Error(ty) => tx ~=~ ty
case _ => false
case PotOption.ReadyNone =>
y match
case PotOption.ReadyNone => true
case _ => false
case PotOption.ReadySome(ax) =>
y match
case PotOption.ReadySome(ay) => ax ~=~ ay
case _ => false
)
}
object pot extends pot