begin work on room state machine

scenes/room/room_state.gd

@@ -0,0 +1,48 @@
+class_name RoomState extends State
+
+
+const STARTING = "Starting"
+const PLAYING = "Playing"
+const EXITING = "Exiting"
+
+var room: Room
+
+
+func _ready() -> void:
+	await owner.ready
+	room = owner as Room
+	assert(room != null, "The RoomState state type must be used only in the room scene. It needs the owner's parent to be a Room node.")
+
+
+func _enter(_previous_state_path: String, _data: Dictionary = {}) -> void:
+	pass
+
+
+func _exit() -> void:
+	pass
+
+
+func _handle_input(_event: InputEvent) -> void:
+	pass
+
+
+func _state_update(_delta: float) -> void:
+	pass
+
+
+func _state_physics_update(_delta: float) -> void:
+	pass
+
+
+func match_state(exclude: Array[StringName] = []) -> StringName:
+	
+	return ""
+
+
+func watch_state(exclude: Array[StringName] = [], data: Dictionary[StringName, Variant] = {}) -> bool:
+	var next_state: StringName = match_state(exclude)
+	if next_state != "":
+		finished.emit(next_state, data)
+		return true
+	
+	return false

scenes/room/room_state.gd.uid

@@ -0,0 +1 @@
+uid://hjm43hb4os07