Initial HelloTyrian example for Indigo

HelloTyrian.scala

import tyrian.*
import tyrian.Html.*
import org.scalajs.dom.document
import scala.scalajs.js.annotation.*

enum Msg:
  case StartIndigo extends Msg

@JSExportTopLevel("TyrianApp")
object Main extends TyrianApp[Msg, TyrianModel]:
  val gameDivId = "game-container"

  def init(flags: Map[String, String]): (TyrianModel, Cmd[Msg]) =
    (TyrianModel.init, Cmd.Emit(Msg.StartIndigo))

  def update(msg: Msg, model: TyrianModel): (TyrianModel, Cmd[Msg]) =
    msg match
      case Msg.StartIndigo =>
        (
          model,
          Cmd.SideEffect { () =>
            HelloIndigo(model.bridge.subSystem(IndigoGameId(gameDivId)))
              .launch(
                gameDivId,
                "width"  -> "550",
                "height" -> "400"
              )
          }
        )

  def view(model: TyrianModel): Html[Msg] =
    div(`class` := "main")(
      div(`class` := "game", id := gameDivId)(),
      div(`class`:= "counter")(),
      div(`class`:= "btn")(
        button()("Click me")
      )
    )

  def subscriptions(model: TyrianModel): Sub[Msg] =
    Sub.Empty

  def main(args: Array[String]): Unit =
    Tyrian.start(document.getElementById("main"), init, update, view, subscriptions)

final case class TyrianModel(bridge: TyrianIndigoBridge[Int])
object TyrianModel:
  val init: TyrianModel(TyrianIndigoBridge())