Many changes

Updated store code - wrapped fold function in Task
Added JSON logging functionality to store middleware
Initial attempt at creating filter combinator for fx observables
Made ListStore code use Effects
Made a router using the store pattern
Misc updates to fx monix implicits

build.sbt

@@ -23,16 +23,16 @@ libraryDependencies ++= Seq(
   "com.softwaremill.sttp.client" %% "core" % "2.2.9",
   "com.softwaremill.sttp.client" %% "monix" % "2.2.9",
   "com.softwaremill.sttp.client" %% "circe" % "2.2.9",
-  "com.softwaremill.sttp.client" %% "async-http-client-backend-monix" % "2.2.9",
   "com.softwaremill.sttp.client" %% "httpclient-backend-monix" % "2.2.9",
   "com.softwaremill.quicklens" %% "quicklens" % "1.6.1",
-  "com.github.valskalla" %% "odin-monix" % "0.8.1",
   "com.typesafe.akka" %% "akka-actor-typed" % "2.6.8",
   "com.softwaremill.macwire" %% "util" % "2.3.7",
   "com.softwaremill.macwire" %% "macros" % "2.3.6" % "provided",
   "com.softwaremill.macwire" %% "macrosakka" % "2.3.6" % "provided",
-  "com.github.valskalla" %% "odin-slf4j" % "0.8.1",
+  "com.github.valskalla" %% "odin-monix" % "0.9.1",
+  "com.github.valskalla" %% "odin-slf4j" % "0.9.1",
   "com.github.valskalla" %% "odin-json" % "0.9.1",
+  "com.github.valskalla" %% "odin-extras" % "0.9.1",
   "com.typesafe.scala-logging" %% "scala-logging" % "3.9.2",
   "com.jfoenix" % "jfoenix" % "9.0.10",
   "org.kordamp.ikonli" % "ikonli-core" % "12.0.0",

src/main/scala/nova/monadic_sfx/Main.scala

@@ -1,16 +1,12 @@
 package nova.monadic_sfx
 
-import scala.concurrent.duration._
-
 import _root_.monix.bio.BIOApp
 import _root_.monix.bio.Task
 import _root_.monix.bio.UIO
 import cats.effect.ExitCode
 import cats.effect.Resource
-import cats.implicits._
 import com.softwaremill.macwire._
 import io.odin._
-import io.odin.syntax._
 import nova.monadic_sfx.executors._
 // import nova.monadic_sfx.util.IOUtils._
 // import sttp.client.httpclient.monix.HttpClientMonixBackend
@@ -18,10 +14,7 @@ object Main extends MainModule with BIOApp {
 
   def appResource(startTime: Long) =
     for {
-      implicit0(logger: Logger[Task]) <-
+      implicit0(logger: Logger[Task]) <- makeLogger
-        consoleLogger().withAsync(timeWindow = 1.millis) |+| fileLogger(
-          "application.log"
-        ).withAsync()
       schedulers = new Schedulers()
       // backend <- Resource.make(
       //   toIO(HttpClientMonixBackend()(schedulers.async))

src/main/scala/nova/monadic_sfx/MainApp.scala

@@ -7,6 +7,8 @@ import nova.monadic_sfx.executors.Schedulers
 import nova.monadic_sfx.implicits.JFXButton
 import nova.monadic_sfx.implicits.JavaFXMonixObservables._
 import nova.monadic_sfx.ui.MyFxApp
+import nova.monadic_sfx.ui.components.router.BrainNotWorking
+import nova.monadic_sfx.ui.components.router.FXRouter
 import nova.monadic_sfx.ui.components.todo.TodoListStore
 import nova.monadic_sfx.ui.components.todo.TodoListView
 import org.gerweck.scalafx.util._
@@ -33,7 +35,7 @@ class MainApp(
     text = "Add"
   }
 
-  lazy val addTodoObs = addTodoButton.observableAction()
+  lazy val addTodoObs = addTodoButton.observableAction
 
   // lazy val todoListView = TodoListView.defaultListView
 
@@ -46,14 +48,14 @@ class MainApp(
         fill = Color.DeepSkyBlue
       }
       children ++= Seq(
-        new JFXButton {
+        // new JFXButton {
-          text = "DummyButton"
+        //   text = "DummyButton"
-        },
+        // },
-        new JFXButton {
+        // new JFXButton {
-          text = "DummyButton2"
+        //   text = "DummyButton2"
-        },
+        // },
-        addTodoButton,
+        // addTodoButton,
-        Test.ttv
+        // Test.ttv
         // todoListView
       )
     }
@@ -62,7 +64,7 @@ class MainApp(
   private lazy val stage = new PrimaryStage {
     title = "Simple ScalaFX App"
     scene = _scene
-    width = 800
+    width = 1000
     height = 400
   }
 
@@ -85,6 +87,30 @@ class MainApp(
     //     .startAndForget
     // )
     _ <- createTodoComponent.executeOn(schedulers.fx)
+    router <- Task(BrainNotWorking.router)
+    routerStore <- router.store(BrainNotWorking.Page.Home, logger)
+    routerNode <- for {
+      node <-
+        Task
+          .deferAction(implicit s =>
+            Task(new HBox {
+              children <-- router
+                .render(BrainNotWorking.resolver)(routerStore)
+                .map(_.delegate)
+            })
+          )
+          .executeOn(schedulers.fx)
+      _ <- Task.deferFuture(
+        routerStore.onNext(FXRouter.Replace(BrainNotWorking.Page.UserHome(1)))
+      )
+
+    } yield node
+    // _ <-
+    //   BrainNotWorking
+    //     .routerTask(logger)
+    //     .flatMap(node => Task(_scene.getChildren += node))
+    //     .executeOn(schedulers.fx)
+    _ <- Task(_scene.getChildren += routerNode).executeOn(schedulers.fx)
     _ <- logger.info(
       s"Application started in ${(System.currentTimeMillis() - startTime) / 1000f} seconds"
     )

src/main/scala/nova/monadic_sfx/MainModule.scala

@@ -1,7 +1,41 @@
 package nova.monadic_sfx
 
+import scala.concurrent.duration._
+
+import _root_.monix.bio.Task
+import cats.implicits._
+import io.odin._
+import io.odin.config._
+import io.odin.syntax._
 import nova.monadic_sfx.actors.ActorModule
 import nova.monadic_sfx.http.HttpModule
 import nova.monadic_sfx.ui.UiModule
+import nova.monadic_sfx.util.reactive.Middlewares
 
-trait MainModule extends ActorModule with UiModule with HttpModule
+trait MainModule extends ActorModule with UiModule with HttpModule {
+  def routerLogger(defaultLogger: Logger[Task], storeLogger: Logger[Task]) =
+    enclosureRouting[Task](
+      "nova.monadic_sfx.util.reactive.Middlewares" -> storeLogger,
+      "nova.monadic_sfx.util.reactive.Store" -> storeLogger
+    )
+      .withFallback(defaultLogger)
+      .withAsync()
+
+  def makeLogger =
+    for {
+      defaultLogger <- consoleLogger[Task]()
+        .withAsync(timeWindow = 1.millis) |+| fileLogger[Task](
+        "application.log"
+      ).withAsync()
+      middlewareLogger <-
+        consoleLogger[
+          Task
+        ](formatter = Middlewares.format)
+          .withMinimalLevel(Level.Trace)
+          .withAsync() |+| fileLogger[Task](
+          "stores.log",
+          formatter = Middlewares.format
+        ).withAsync()
+      routerLogger <- routerLogger(defaultLogger, middlewareLogger)
+    } yield (routerLogger)
+}

src/main/scala/nova/monadic_sfx/Types.scala

@@ -5,7 +5,7 @@ import java.nio.ByteBuffer
 import monix.eval.Task
 import monix.reactive.Observable
 import sttp.client.SttpBackend
-import sttp.client.asynchttpclient.WebSocketHandler
+import sttp.client.httpclient.WebSocketHandler
 
 trait AppTypes {
   type HttpBackend =

src/main/scala/nova/monadic_sfx/implicits/JavaFxMonixObservables.scala

@@ -7,9 +7,11 @@ import javafx.event.EventHandler
 import javafx.scene.{input => jfxsi}
 import javafx.{event => jfxe}
 import monix.bio.Task
+import monix.eval.Coeval
 import monix.execution.Ack
 import monix.execution.Cancelable
 import monix.execution.Scheduler
+import monix.execution.cancelables.SingleAssignCancelable
 import monix.reactive.Observable
 import monix.reactive.Observer
 import monix.reactive.OverflowStrategy
@@ -19,8 +21,8 @@ import org.gerweck.scalafx.util._
 import scalafx.Includes._
 import scalafx.beans.property.Property
 import scalafx.beans.property.ReadOnlyProperty
-import scalafx.beans.value.ObservableValue
 import scalafx.collections.ObservableBuffer
+import scalafx.event.subscriptions.Subscription
 import scalafx.scene.Scene
 import scalafx.scene.control.ButtonBase
 import scalafx.scene.control.MenuItem
@@ -84,17 +86,20 @@ object JavaFXMonixObservables {
     }
 
     def <--(obs: Observable[T])(implicit s: Scheduler) = {
-      obs.doOnNext(v => me.Task(prop.value = v)).subscribe()
+      obs.doOnNextF(v => Coeval(prop.value = v)).subscribe()
     }
 
     def asOption = prop.map(Option(_))
 
-    def observableChange[J1 >: J](): Observable[J1] = {
+    def observableChange[J1 >: J]: Observable[J1] = {
       import monix.execution.cancelables.SingleAssignCancelable
       Observable.create(OverflowStrategy.Unbounded) { sub =>
         val c = SingleAssignCancelable()
 
-        val canc = prop.onChange((a, b, c) => sub.onNext(c))
+        val canc =
+          prop.onChange((a, b, c1) =>
+            if (c1 != null && sub.onNext(c1) == Ack.Stop) c.cancel()
+          )
 
         c := Cancelable(() => canc.cancel())
         c
@@ -113,16 +118,17 @@ object JavaFXMonixObservables {
     }
 
     def <--(obs: Observable[A])(implicit s: Scheduler) = {
-      obs.doOnNext(v => me.Task(prop() = v)).subscribe()
+      obs.doOnNextF(v => Coeval(prop() = v)).subscribe()
     }
 
-    def observableChange[J1 >: A]()
+    def observableChange[J1 >: A]: Observable[J1] = {
-        : Observable[(ObservableValue[A, A], J1, J1)] = {
       import monix.execution.cancelables.SingleAssignCancelable
       Observable.create(OverflowStrategy.Unbounded) { sub =>
         val c = SingleAssignCancelable()
 
-        val canc = prop.onChange((a, b, c) => sub.onNext((a, b, c)))
+        val canc = prop.onChange((_, _, c1) =>
+          if (c1 != null && sub.onNext(c1) == Ack.Stop) c.cancel()
+        )
 
         c := Cancelable(() => canc.cancel())
         c
@@ -130,6 +136,59 @@ object JavaFXMonixObservables {
     }
   }
 
+  implicit final class ObservableListExt[A](
+      private val buffer: ObservableList[A]
+  ) extends AnyVal {
+
+    // def -->(sub: Observer[A]) =
+    //   buffer.onChange((a, b, c) => if (c != null) sub.onNext(c))
+
+    // def -->(op: Property[A, A]) = {
+    //   buffer.onChange((a, b, c) => if (c != null) op() = c)
+    // }
+
+    def <--(obs: Observable[A])(implicit s: Scheduler) = {
+      obs
+        .doOnNextF(v =>
+          for {
+            _ <- Coeval(buffer.clear())
+            _ <- Coeval(buffer += v)
+          } yield ()
+        )
+        .subscribe()
+    }
+
+    def observableChange[J1 >: A]: Observable[J1] = {
+      import monix.execution.cancelables.SingleAssignCancelable
+      Observable.create(OverflowStrategy.Unbounded) { sub =>
+        val c = SingleAssignCancelable()
+
+        implicit val s = sub.scheduler
+
+        val canc =
+          buffer.onChange((buf, _) =>
+            loop(sub, buf.toIterable.iterator, c).runToFuture
+          )
+
+        c := Cancelable(() => canc.cancel())
+        c
+      }
+    }
+
+    private def loop(
+        sub: Observer[A],
+        it: Iterator[A],
+        c: Cancelable
+    ): Task[Unit] =
+      if (it.hasNext) {
+        val next = it.next()
+        Task.deferFuture(sub.onNext(next)).flatMap {
+          case Ack.Continue => loop(sub, it, c)
+          case Ack.Stop     => Task(c.cancel())
+        }
+      } else Task.unit
+  }
+
   implicit final class BindObs3[T, J](private val prop: ReadOnlyProperty[T, J])
       extends AnyVal {
     def -->(op: Observer[T]) = {
@@ -140,12 +199,14 @@ object JavaFXMonixObservables {
       op <== prop
     }
 
-    def observableChange[J1 >: J](): Observable[J1] = {
+    def observableChange[J1 >: J]: Observable[J1] = {
       import monix.execution.cancelables.SingleAssignCancelable
       Observable.create(OverflowStrategy.Unbounded) { sub =>
         val c = SingleAssignCancelable()
 
-        val canc = prop.onChange((a, b, c) => sub.onNext(c))
+        val canc = prop.onChange((a, b, c1) =>
+          if (c1 != null && sub.onNext(c1) == Ack.Stop) c.cancel()
+        )
 
         c := Cancelable(() => canc.cancel())
         c
@@ -160,15 +221,18 @@ object JavaFXMonixObservables {
       obs.doOnNext(v => me.Task(prop() = ObservableBuffer.from(v))).subscribe()
     }
 
-    def -->(sub: Observer[A])(implicit s: Scheduler) =
+    def -->(sub: Observer[A])(implicit s: Scheduler) = {
-      prop.onChange((a, b, c) =>
+      val c = SingleAssignCancelable()
-        if (c != null)
+      val subs: Subscription = prop.onChange((a, b, c1) =>
+        if (c1 != null)
           Iterant[Task]
-            .fromIterable(c.toIterable)
+            .fromIterable(c1.toIterable)
             .consume
-            .use(consume(sub, _))
+            .use(consume(sub, c, _))
             .runToFuture
       )
+      c := Cancelable(() => subs.cancel())
+    }
 
     private def loop(sub: Observer[A], it: Iterator[A]): Task[Unit] =
       if (it.hasNext) {
@@ -181,14 +245,15 @@ object JavaFXMonixObservables {
 
     private def consume(
         sub: Observer[A],
+        c: Cancelable,
         consumer: Iterant.Consumer[Task, A]
     ): Task[Unit] =
       consumer.pull.flatMap {
         case Left(value) => Task.unit
         case Right(value) =>
           Task.deferFuture(sub.onNext(value)).flatMap {
-            case Ack.Continue => consume(sub, consumer)
+            case Ack.Continue => consume(sub, c, consumer)
-            case Ack.Stop     => Task.unit
+            case Ack.Stop     => Task(c.cancel())
           }
       }
 
@@ -212,7 +277,7 @@ object JavaFXMonixObservables {
       private val button: ButtonBase
   ) extends AnyVal {
 
-    def observableAction(): Observable[jfxe.ActionEvent] = {
+    def observableAction: Observable[jfxe.ActionEvent] = {
       import monix.execution.cancelables.SingleAssignCancelable
       Observable.create(OverflowStrategy.Unbounded) { sub =>
         val c = SingleAssignCancelable()
@@ -238,7 +303,7 @@ object JavaFXMonixObservables {
       private val item: MenuItem
   ) extends AnyVal {
 
-    def observableAction(): Observable[jfxe.ActionEvent] = {
+    def observableAction: Observable[jfxe.ActionEvent] = {
       import monix.execution.cancelables.SingleAssignCancelable
       Observable.create(OverflowStrategy.Unbounded) { sub =>
         val c = SingleAssignCancelable()

src/main/scala/nova/monadic_sfx/implicits/MenuItem.scala

@@ -5,6 +5,5 @@ import scalafx.scene.{control => sfxc}
 import JavaFXMonixObservables._
 
 class MenuItem extends sfxc.MenuItem {
-  def obsAction =
+  def obsAction = new ActionObservableBuilder(this.observableAction)
-    new ActionObservableBuilder(this.observableAction())
 }

src/main/scala/nova/monadic_sfx/ui/MyFxApp.scala

@@ -21,14 +21,14 @@ class MyFxApp(val schedulers: Schedulers)(implicit logger: Logger[Task]) {
 
   // def stage_=(stage: PrimaryStage) = Task(internal.stage = stage)
 
-  def useInternal[T](f: JFXApp => Task[T]): Task[T] =
+  // def useInternal[T](f: JFXApp => Task[T]): Task[T] =
-    for {
+  //   for {
-      _ <- logger.debug("Request for using internal value")
+  //     _ <- logger.debug("Request for using internal value")
-      res <- f(internal).executeOn(schedulers.fx)
+  //     res <- f(internal).executeOn(schedulers.fx)
-      _ <- logger.debug(s"Result was ${res.toString()}")
+  //     _ <- logger.debug(s"Result was ${res.toString()}")
-    } yield (res)
+  //   } yield (res)
 
-  def init(stage: => PrimaryStage, delay: FiniteDuration = 2000.millis) =
+  def init(stage: => PrimaryStage, delay: FiniteDuration = 200.millis) =
     for {
       _ <- logger.info("Starting FX App")
       fib <- Task(internal.main(Array.empty)).start

src/main/scala/nova/monadic_sfx/ui/components/router/FXRouter.scala

@@ -0,0 +1,107 @@
+package nova.monadic_sfx.ui.components.router
+
+import enumeratum._
+import io.circe.Encoder
+import io.circe.generic.JsonCodec
+import io.odin.Logger
+import monix.bio.Task
+import nova.monadic_sfx.util.IOUtils
+import nova.monadic_sfx.util.reactive.Reducer
+import nova.monadic_sfx.util.reactive.Store
+import scalafx.scene.Parent
+import scalafx.scene.control.Label
+
+object FXRouter {
+
+  final case class State[P](page: P)
+
+  @JsonCodec
+  sealed abstract class Action[T]
+  // final case object Init extends Action
+  final case class Replace[T](p: T) extends Action[T]
+
+  type FXStore[P] = Store[Action[P], State[P]]
+
+  // def resolver2 = resolver.lift.andThen(_.getOrElse(notFound))
+
+  // def resolver: PartialFunction[P <: Enum[P]][P, Parent] = {
+  //   case Home => new TextField
+  // }
+
+}
+
+class FXRouter[P <: EnumEntry](
+)(implicit E: Encoder[P]) {
+  import FXRouter._
+
+  def store(initialPage: P, logger: Logger[Task]) =
+    Task.deferAction(implicit s =>
+      Store.createL[Action[P], State[P]](
+        Replace(initialPage),
+        State(initialPage),
+        Reducer.withOptionalEffects[Task, Action[P], State[P]](reducer _)
+        // Seq(actionLoggerMiddleware(logger, "RouterStore"))
+      )
+    )
+
+  def reducer(
+      state: State[P],
+      action: Action[P]
+  ): (State[P], Option[Task[Action[P]]]) =
+    action match {
+      // case Init => (state, None)
+      case Replace(p) =>
+        (state.copy(page = p), None)
+    }
+
+  def render(
+      resolver: P => Task[Parent]
+  )(implicit store: FXStore[P]) =
+    store.mapEval { case (_, FXRouter.State(p)) => IOUtils.toTask(resolver(p)) }
+
+  def link(
+      page: P,
+      store: FXStore[P]
+  ) = {
+    store.onNext(Replace(page))
+  }
+}
+
+object BrainNotWorking {
+
+  @JsonCodec
+  sealed trait Page extends EnumEntry
+  object Page extends Enum[Page] {
+    val values = findValues
+    final case object Home extends Page
+    final case class UserHome(id: Int) extends Page
+  }
+
+  def resolver: PartialFunction[Page, Task[Parent]] = {
+    case Page.Home =>
+      Task(new Label {
+        text = "HomePage"
+      })
+    case Page.UserHome(id0) =>
+      Task(new Label {
+        text = s"User Home, Id = $id0"
+      })
+  }
+
+  val router = new FXRouter[Page]
+}
+
+// case class State()
+// object RouterStore {
+
+//   sealed trait Action
+//   case object Init extends Action
+
+//   def reducer(state: State, action: Action) =
+//     action match {
+//       case Init => state
+
+//     }
+//   def apply() =
+//     Store.createL[Action, State](Init, State(), Reducer(reducer _), Seq.empty)
+// }

src/main/scala/nova/monadic_sfx/ui/components/todo/TodoListStore.scala

@@ -13,40 +13,77 @@ case class Todo(id: Int, content: String)
 object TodoListStore {
 
   @JsonCodec
-  sealed trait Command
+  sealed trait Action
-  case object Init extends Command
+  case object Init extends Action
-  case class Add(content: String) extends Command
+  case class Add(content: String) extends Action
-  case class Edit(id: Int, content: String) extends Command
+  case class Edit(id: Int, content: String) extends Action
-  case class Delete(id: Int) extends Command
+  case class Delete(id: Int) extends Action
+
+  private case class InternalAdd(content: String) extends Action
+  private case object End extends Action
 
   case class State(todos: Vector[Todo], counter: Int)
 
-  def reducer(
+  def reducer(logger: Logger[Task])(
       state: State,
-      action: Command
+      action: Action
-  ) =
+  ): (State, Option[Task[Action]]) =
     action match {
-      case Init => state
+      case Init => (state, None)
       case Add(content) =>
-        state.copy(
+        val nextAction = Some(for {
+          // _ <- logger.debug(s"Received $content")
+          res <- Task.pure(InternalAdd(content))
+        } yield res)
+        (state, nextAction)
+      case Edit(_id, content) =>
+        val condition: Todo => Boolean = _.id == _id
+        val nextState = state
+          .modify(_.todos.eachWhere(condition))
+          .using(_.copy(content = content))
+        (nextState, None)
+      case Delete(id) =>
+        (state.copy(state.todos.filterNot(_.id == id)), None)
+
+      case InternalAdd(content) =>
+        val nextState = state.copy(
           todos = state.todos :+ Todo(state.counter, content),
           counter = state.counter + 1
         )
-      case Edit(_id, content) =>
+        (nextState, Some(logger.debug(s"Received $content") >> Task.pure(End)))
-        val condition: Todo => Boolean = _.id == _id
+      case End => (state, None)
-        state
-          .modify(_.todos.eachWhere(condition))
-          .using(_.copy(content = content))
-      case Delete(id) =>
-        state.copy(state.todos.filterNot(_.id == id))
     }
 
   def apply(logger: Logger[Task]) =
+    Task.deferAction(implicit s =>
+      for {
+        logMware <- actionLoggerMiddleware[Action, State](logger, "TodoStore")
+        store <-
           Store
-      .createL[Command, State](
+            .createL[Action, State](
               Init,
               State(Vector.empty[Todo], 0),
-        Reducer(reducer _),
+              Reducer.withOptionalEffects(reducer(logger) _),
-        Seq(actionLoggerMiddleware(logger))
+              Seq(
+                // actionLoggerMiddleware(logger, "TodoStore2")
+                logMware
+              )
+            )
+      } yield (store)
     )
 }
+
+// Task.deferAction(implicit s =>
+//   Store
+//     .createJsonL[Action, State](
+//       Init,
+//       State(Vector.empty[Todo], 0),
+//       Reducer.withOptionalEffects(reducer(logger) _),
+//       "TodoStore",
+//       logger
+//       // Seq(
+//       //   actionLoggerMiddleware(logger, "TodoStore")
+//       //   // actionLoggerMiddleware(logger, "TodoStore2")
+//       // )
+//     )
+// )

src/main/scala/nova/monadic_sfx/ui/components/todo/TodoListView.scala

@@ -2,6 +2,7 @@ package nova.monadic_sfx.ui.components.todo
 
 import monix.bio.Task
 import monix.execution.cancelables.CompositeCancelable
+import monix.{eval => me}
 import nova.monadic_sfx.implicits.FontIcon
 import nova.monadic_sfx.implicits.IconLiteral
 import nova.monadic_sfx.implicits.JFXButton
@@ -21,13 +22,12 @@ import scalafx.scene.control.ListCell
 import scalafx.scene.control.SelectionMode
 import scalafx.scene.layout.HBox
 import scalafx.scene.text.Text
-import monix.{eval => me}
 
 object TodoListView {
   def apply(
       store: MonixProSubject[
-        TodoListStore.Command,
+        TodoListStore.Action,
-        (TodoListStore.Command, TodoListStore.State)
+        (TodoListStore.Action, TodoListStore.State)
       ]
   ): Task[Node] =
     Task.deferAction(implicit s =>
@@ -48,6 +48,9 @@ object TodoListView {
             new JFXListView[Todo] {
               def selectedItems = selectionModel().selectedItems.view
 
+              selectionModel().selectionMode = SelectionMode.Multiple
+              selectionModel().selectedItems.observableSeqValue ==> _selectedItems
+
               cc += items <-- todos
 
               val emptyCell = ObjectProperty(new HBox)
@@ -78,9 +81,6 @@ object TodoListView {
 
                 }
 
-              selectionModel().selectionMode = SelectionMode.Multiple
-              selectionModel().selectedItems.observableSeqValue ==> _selectedItems
-
               contextMenu = new ContextMenu {
                 items ++= Seq(
                   new MenuItem {
@@ -94,6 +94,12 @@ object TodoListView {
                         .map(todo => TodoListStore.Delete(todo.id))
                         .toList
                     ) --> store
+
+                    // obsAction.split(
+                    //   _.useLazyEval(me.Task(TodoListStore.Delete(0))) --> store,
+                    //   _.useLazyEval(me.Task(TodoListStore.Delete(0))) --> store,
+                    //   _.useLazyEval(me.Task(TodoListStore.Delete(0))) --> store
+                    // )
                   },
                   new MenuItem {
                     text = "Edit"
@@ -103,7 +109,7 @@ object TodoListView {
             },
             new JFXButton {
               text = "Add"
-              disable <== _selectedItems.map(_.length > 0)
+              // disable <== _selectedItems.map(_.length > 0)
               obsAction
                 .useLazyEval(me.Task(TodoListStore.Add(_content()))) --> store
             },

src/main/scala/nova/monadic_sfx/util/Misc.scala

@@ -0,0 +1,63 @@
+package nova.monadic_sfx.util
+
+import scalafx.beans.property.ObjectProperty
+import scalafx.beans.property.ReadOnlyObjectProperty
+import scalafx.beans.value.ObservableValue
+
+object Misc {
+
+  implicit final class MyRichObservable[A, C](val self: ObservableValue[A, C])
+      extends AnyVal {
+    def filter(f: A => Boolean): ReadOnlyObjectProperty[A] =
+      Method.filter(self)(f)
+    def filterNull: ReadOnlyObjectProperty[A] = Method.filterNull(self)
+  }
+
+}
+object Method {
+  type Observable[A] = ObservableValue[A, _]
+
+  def filter[B](
+      a: Observable[B]
+  )(f: B => Boolean): ReadOnlyObjectProperty[B] = {
+
+    val prop = ObjectProperty[B](a.value)
+
+    def changeHandler() =
+      prop.synchronized {
+        if (f(a.value)) {
+          prop.value = a.value
+        }
+      }
+
+    a onChange changeHandler()
+    prop
+  }
+
+  /**
+    * Simply creates a new observable that mirrors the source observable but
+    * doesn't emit null values. JavaFX likes to work with null values in scene
+    * nodes/properties (shrugs) and observables by default emit null values
+    * that can cause crashes. ScalaFX does not offer any *fixes* for this
+    *
+    * @param a
+    * @return
+    */
+  def filterNull[B](
+      a: Observable[B]
+  ): ReadOnlyObjectProperty[B] = {
+
+    val prop = ObjectProperty[B](a.value)
+
+    def changeHandler() =
+      prop.synchronized {
+        if (a.value != null) {
+          prop.value = a.value
+        }
+      }
+
+    a onChange changeHandler()
+    prop
+  }
+
+}

src/main/scala/nova/monadic_sfx/util/reactive/Middlewares.scala

@@ -1,27 +1,75 @@
 package nova.monadic_sfx.util.reactive
 
+import java.time.LocalDateTime
+
+import io.circe.Encoder
+import io.circe.Printer
+import io.circe.generic.JsonCodec
+import io.circe.syntax._
 import io.odin.Logger
+import io.odin.LoggerMessage
+import io.odin.formatter.options.PositionFormat
+import io.odin.formatter.options.ThrowableFormat
+import io.odin.meta.Render
 import monix.bio.Task
 import monix.reactive.Observable
-import nova.monadic_sfx.util.IOUtils._
-
 // object Middleware {
 //   def apply[A,M,T](ob: Observable[(A,M)], cb: (A,M) => T): Observable[(A,M)] = ob
 // }
-object Middlewares {
+
-  def actionStateLoggerMiddleware[A, M](
+@JsonCodec
-      logger: Logger[Task]
+final case class StoreInfo[A](
-  ): Middleware[A, M] =
+    name: String,
-    (obs: Observable[(A, M)]) =>
+    action: A,
-      obs.doOnNext {
+    time: LocalDateTime = LocalDateTime.now()
-        case (a, m) => toTask(logger.debug(s"Received action $a with state $m"))
+)
+
+object StoreInfo {
+  val printer = Printer.noSpaces
+  implicit def render[T: Encoder]: Render[StoreInfo[T]] =
+    new Render[StoreInfo[T]] {
+      override def render(m: StoreInfo[T]): String = printer.print(m.asJson)
+    }
 }
 
-  def actionLoggerMiddleware[A, M](
+object Middlewares {
+
+  // val encoder: Encoder[LoggerMessage] =
+  //   Encoder.forProduct1("message")(m => m.message.value)
+
+  val format = create(ThrowableFormat.Default, PositionFormat.Full)
+
+  def create(
+      throwableFormat: ThrowableFormat,
+      positionFormat: PositionFormat
+  ): io.odin.formatter.Formatter = {
+    // val encoder: Encoder[LoggerMessage] =
+    //   Encoder.forProduct1("message")(m => m.message.value)
+    (msg: LoggerMessage) => msg.message.value
+  }
+
+  def actionStateLoggerMiddleware[A, M](
       logger: Logger[Task]
-  ): Middleware[A, M] =
+  ): Task[Middleware[A, M]] =
-    (obs: Observable[(A, M)]) =>
+    Task.deferAction(implicit s =>
-      obs.doOnNext {
+      Task((obs: Observable[(A, M)]) =>
-        case (a, _) => toTask(logger.debug(s"Received action $a "))
+        obs.doOnNextF {
+          case (a, m) =>
+            logger.debug(s"Received action $a with state $m")
         }
+      )
+    )
+
+  def actionLoggerMiddleware[A: Encoder, M](
+      logger: Logger[Task],
+      name: String
+  ): Task[Middleware[A, M]] =
+    Task.deferAction(implicit s =>
+      Task((obs: Observable[(A, M)]) =>
+        obs.doOnNextF {
+          case (a, _) =>
+            logger.debug(StoreInfo(name, a))
+        }
+      )
+    )
 }

src/main/scala/nova/monadic_sfx/util/reactive/Store.scala

@@ -1,9 +1,8 @@
 package nova.monadic_sfx.util.reactive
 
-import cats.effect.Sync
+import io.circe.Encoder
+import io.odin.Logger
 import monix.bio.Task
-import monix.execution.Scheduler
-import monix.reactive.Observable
 import monix.reactive.OverflowStrategy
 import monix.reactive.subjects.ConcurrentSubject
 
@@ -15,7 +14,7 @@ object Store {
       middlewares: Seq[Middleware[A, M]] = Seq.empty,
       overflowStrategy: OverflowStrategy.Synchronous[A] =
         OverflowStrategy.DropOld(50)
-  ) =
+  ): Task[Store[A, M]] =
     Task.deferAction { implicit s =>
       Task {
         val subject = ConcurrentSubject.publish[A](overflowStrategy)
@@ -35,7 +34,7 @@ object Store {
           .behavior(initialAction -> initialState)
           .refCount
 
-        val res = middlewares.view.reverse.foldLeft(obs) {
+        val res = middlewares.foldLeft(obs) {
           case (obs, middleware) => middleware(obs)
         }
 
@@ -46,16 +45,23 @@ object Store {
       }
     }
 
-  def create[F[_], A, M](
+  def createJsonL[A: Encoder, M](
       initialAction: A,
       initialState: M,
-      reducer: Reducer[A, M]
+      reducer: Reducer[A, M],
-  )(implicit s: Scheduler, F: Sync[F]): F[Observable[(A, M)]] =
+      storeName: String,
-    F.delay {
+      logger: Logger[Task],
-      val subject = ConcurrentSubject.publish[A]
+      middlewares: Seq[Middleware[A, M]] = Seq.empty,
+      overflowStrategy: OverflowStrategy.Synchronous[A] =
+        OverflowStrategy.DropOld(50)
+  ): Task[Store[A, M]] =
+    Task.deferAction { implicit s =>
+      Task {
+        val subject = ConcurrentSubject.publish[A](overflowStrategy)
 
-      val fold: ((A, M), A) => (A, M) = {
+        val fold: ((A, M), A) => Task[(A, M)] = {
-        case ((_, state), action) => {
+          case ((_, state), action) =>
+            Task {
               val (newState, effects) = reducer(state, action)
 
               effects.subscribe(subject.onNext _)
@@ -64,10 +70,28 @@ object Store {
             }
         }
 
-      subject
+        val obs = subject
-        .scan[(A, M)](initialAction -> initialState)(fold)
+          .doOnNextF(action =>
+            logger.debug(
+              StoreInfo(storeName, action)
+            ) // .executeOn(Scheduler.global)
+          )
+          // .doOnNextF(action => Coeval(println(action)))
+          .scanEvalF[Task, (A, M)](Task.pure(initialAction -> initialState))(
+            fold
+          )
           .behavior(initialAction -> initialState)
           .refCount
+
+        // val res = middlewares.foldLeft(obs) {
+        //   case (obs, middleware) => middleware(obs)
+        // }
+
+        MonixProSubject.from(
+          subject,
+          obs
+        )
+      }
     }
 
 }

src/main/scala/nova/monadic_sfx/util/reactive/package.scala

@@ -6,6 +6,7 @@ import monix.reactive.Observer
 package object reactive {
   type MonixProSubject[-I, +O] = Observable[O] with Observer[I]
   type Middleware[A, M] = Observable[(A, M)] => Observable[(A, M)]
+  type Store[A, M] = MonixProSubject[A, (A, M)]
 
   /**
     * A Function that applies an Action onto the Stores current state.