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• 0.3.0
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• CmdRunner.scala

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tyrian.runtime.CmdRunner.scala Maven / Gradle / Ivy

package tyrian.runtime

import tyrian.Cmd
import tyrian.Task

object CmdRunner:
  def runCmd[Msg](
      cmd: Cmd[Msg],
      callback: Msg => Unit,
      async: (=> Unit) => Unit
  ): Unit =
    val allCmds = {
      def loop(cmd: Cmd[Msg]): Unit =
        cmd match
          case Cmd.Empty =>
            ()

          case Cmd.Emit(msg) =>
            callback(msg)

          case Cmd.SideEffect(task) =>
            async(TaskRunner.execTask(task, _ => ()))

          case Cmd.Run(obs, f) =>
            async(TaskRunner.execTask(Task.RunObservable(obs), f andThen callback))

          case Cmd.RunTask(task, f) =>
            async(TaskRunner.execTask(task, f andThen callback))

          case Cmd.Combine(cmd1, cmd2) =>
            loop(cmd1)
            loop(cmd2)

          case Cmd.Batch(cmds) =>
            cmds.foreach(loop)

      loop(cmd)
    }