godot-demo-projects/2d/finite_state_machine/player/player_state_machine.gd

extends "res://state_machine/state_machine.gd"

func _ready():
	states_map = {
		"idle": $Idle,
		"move": $Move,
		"jump": $Jump,
		"stagger": $Stagger,
		"attack": $Attack,
	}

func _change_state(state_name):
	"""
	The base state_machine interface this node extends does most of the work
	"""
	if not _active:
		return
	if state_name in ["stagger", "jump", "attack"]:
		states_stack.push_front(states_map[state_name])
	if state_name == "jump" and current_state == $Move:
		$Jump.initialize($Move.speed, $Move.velocity)
	._change_state(state_name)

func _input(event):
	"""
	Here we only handle input that can interrupt states, attacking in this case
	otherwise we let the state node handle it
	"""
	if event.is_action_pressed("attack"):
		if current_state in [$Attack, $Stagger]:
			return
		_change_state("attack")
		return
	current_state.handle_input(event)