rename KeyAdjacency to KeyHelper and move is_adjacent to GameKey

scripts/game_key.gd

@@ -195,6 +195,15 @@ func get_default_transform() -> Transform3D:
 	return Transform3D(Quaternion.from_euler(_default_rotation), _default_position)
 
 
+func is_adjacent(to: GameKey) -> bool:
+	return (
+		KeyHelper.ADJACENCY_MAP.has(props.physical_keycode)
+		and (
+			to.props.physical_keycode in KeyHelper.ADJACENCY_MAP[props.physical_keycode]
+		)
+	)
+
+
 #endregion
 
 
@@ -437,7 +446,7 @@ func _on_keyboard_is_configuring_changed(value: bool) -> void:
 
 
 func _on_keyboard_player_key_changed(game_key: GameKey) -> void:
-	_adjacency_light.visible = KeyAdjacency.is_adjacent(game_key, self)
+	_adjacency_light.visible = is_adjacent(game_key)
 
 
 func _on_keyboard_player_finished_move(game_key: GameKey) -> void:

scripts/key_helper.gd

@@ -1,6 +1,6 @@
-class_name KeyAdjacency
+class_name KeyHelper
 
-const MAP: Dictionary[Key, Array] = {
+const ADJACENCY_MAP: Dictionary[Key, Array] = {
 	KEY_1: [KEY_2, KEY_Q],
 	KEY_2: [KEY_3, KEY_W, KEY_Q, KEY_1],
 	KEY_3: [KEY_4, KEY_E, KEY_W, KEY_2],
@@ -49,10 +49,3 @@ const MAP: Dictionary[Key, Array] = {
 	KEY_PERIOD: [KEY_L, KEY_SEMICOLON, KEY_SLASH, KEY_COMMA],
 	KEY_SLASH: [KEY_SEMICOLON, KEY_APOSTROPHE, KEY_PERIOD],
 }
-
-
-static func is_adjacent(from: GameKey, to: GameKey) -> bool:
-	return (
-		MAP.has(from.props.physical_keycode)
-		and (to.props.physical_keycode in KeyAdjacency.MAP[from.props.physical_keycode])
-	)

scripts/player.gd

@@ -101,11 +101,7 @@ func _finish_move(_interrupted: bool) -> void:
 
 #region event handlers
 func _on_keyboard_key_press_changed(game_key: GameKey, event: InputEventKey) -> void:
-	if (
-		event.is_pressed()
-		and _current_key
-		and KeyAdjacency.is_adjacent(_current_key, game_key)
-	):
+	if event.is_pressed() and _current_key and _current_key.is_adjacent(game_key):
 		_move(game_key)
 
 #endregion