fix: fixed priority changes

packages/pinball_components/lib/src/components/ramp_opening.dart

@@ -29,12 +29,12 @@ abstract class RampOpening extends BodyComponent with InitialPosition, Layered {
   RampOpening({
     required Layer pathwayLayer,
     Layer? outsideLayer,
-    required int pathwayPriority,
+    int? pathwayPriority,
     int? outsidePriority,
     required this.orientation,
   })  : _pathwayLayer = pathwayLayer,
         _outsideLayer = outsideLayer ?? Layer.board,
-        _pathwayPriority = pathwayPriority,
+        _pathwayPriority = pathwayPriority ?? 0,
         _outsidePriority = outsidePriority ?? 0 {
     layer = Layer.opening;
   }
@@ -96,8 +96,8 @@ class RampOpeningBallContactCallback<Opening extends RampOpening>
       layer = opening.pathwayLayer;
       _ballsInside.add(ball);
       ball
-        ..layer = layer
-        ..priority = opening.pathwayPriority;
+        ..sendTo(opening.pathwayPriority)
+        ..layer = layer;
     } else {
       _ballsInside.remove(ball);
     }
@@ -119,8 +119,8 @@ class RampOpeningBallContactCallback<Opening extends RampOpening>
 
       if (isBallOutsideOpening) {
         ball
-          ..layer = opening.outsideLayer
-          ..priority = opening.outsidePriority;
+          ..sendTo(opening.outsidePriority)
+          ..layer = opening.outsideLayer;
         _ballsInside.remove(ball);
       }
     }

packages/pinball_components/lib/src/components/spaceship.dart

@@ -152,8 +152,8 @@ class SpaceshipEntrance extends RampOpening {
       : super(
           pathwayLayer: Layer.spaceship,
           orientation: RampOrientation.up,
+          pathwayPriority: Spaceship.ballPriorityWhenOnSpaceship,
         ) {
-    priority = Spaceship.ballPriorityWhenOnSpaceship;
     layer = Layer.spaceship;
   }
 
@@ -185,6 +185,7 @@ class SpaceshipHole extends RampOpening {
       : super(
           pathwayLayer: Layer.spaceship,
           outsideLayer: onExitLayer,
+          outsidePriority: onExitElevation,
           orientation: RampOrientation.up,
         ) {
     layer = Layer.spaceship;
@@ -267,7 +268,7 @@ class SpaceshipEntranceBallContactCallback
   @override
   void begin(SpaceshipEntrance entrance, Ball ball, _) {
     ball
-      ..showInFrontOf(entrance)
+      ..sendTo(entrance.pathwayPriority)
       ..layer = Layer.spaceship;
   }
 }
@@ -275,16 +276,14 @@ class SpaceshipEntranceBallContactCallback
 /// [ContactCallback] that handles the contact between the [Ball]
 /// and a [SpaceshipHole].
 ///
-/// It sets the [Ball] priority and filter data so it will "be back" on the
-/// board.
+/// It sets the [Ball] priority and filter data so it will outside of the
+/// [Spaceship].
 class SpaceshipHoleBallContactCallback
     extends ContactCallback<SpaceshipHole, Ball> {
   @override
   void begin(SpaceshipHole hole, Ball ball, _) {
     ball
-      // TODO(ruimiguel): apply Elevated when PR merged.
-      ..priority = hole.onExitElevation
-      ..gameRef.reorderChildren()
+      ..sendTo(hole.outsidePriority)
       ..layer = hole.outsideLayer;
   }
 }

packages/pinball_components/lib/src/flame/priority.dart

@@ -1,4 +1,3 @@
-// TODO(ruimiguel): move file to appropiate location.
 import 'dart:math' as math;
 import 'package:flame/components.dart';
 
@@ -6,6 +5,14 @@ import 'package:flame/components.dart';
 extension ComponentPriorityX on Component {
   static const _lowestPriority = 0;
 
+  /// Changes the priority to a specific one.
+  void sendTo(int destinationPriority) {
+    if (priority != destinationPriority) {
+      priority = math.max(destinationPriority, _lowestPriority);
+      reorderChildren();
+    }
+  }
+
   /// Changes the priority to the lowest possible.
   void sendToBack() {
     if (priority != _lowestPriority) {