From 071c4c16e4a702cf70149a57cf98bdad8f9885e9 Mon Sep 17 00:00:00 2001
From: Ruslan Ignatov <ruslanlena30@gmail.com>
Date: Sat, 27 Jun 2026 18:02:21 +0300
Subject: [PATCH] Added state machine

---
 game/state_machine/abstract_state.gd     | 28 +++++++++++++++
 game/state_machine/abstract_state.gd.uid |  1 +
 game/state_machine/abstract_state.tscn   |  6 ++++
 game/state_machine/state_machine.gd      | 43 ++++++++++++++++++++++++
 game/state_machine/state_machine.gd.uid  |  1 +
 game/state_machine/state_machine.tscn    |  6 ++++
 6 files changed, 85 insertions(+)
 create mode 100644 game/state_machine/abstract_state.gd
 create mode 100644 game/state_machine/abstract_state.gd.uid
 create mode 100644 game/state_machine/abstract_state.tscn
 create mode 100644 game/state_machine/state_machine.gd
 create mode 100644 game/state_machine/state_machine.gd.uid
 create mode 100644 game/state_machine/state_machine.tscn

diff --git a/game/state_machine/abstract_state.gd b/game/state_machine/abstract_state.gd
new file mode 100644
index 0000000..d833e57
--- /dev/null
+++ b/game/state_machine/abstract_state.gd
@@ -0,0 +1,28 @@
+class_name AbstractState
+extends Node
+
+
+@warning_ignore("unused_signal")
+signal switch_state(state: AbstractState)
+
+
+func init() -> void:
+	pass
+
+
+func enter() -> void:
+	pass
+
+
+func exit() -> void:
+	pass
+
+
+@warning_ignore("unused_parameter")
+func process(delta: float) -> void:
+	pass
+
+
+@warning_ignore("unused_parameter")
+func physics_process(delta: float) -> void:
+	pass
diff --git a/game/state_machine/abstract_state.gd.uid b/game/state_machine/abstract_state.gd.uid
new file mode 100644
index 0000000..b476f7c
--- /dev/null
+++ b/game/state_machine/abstract_state.gd.uid
@@ -0,0 +1 @@
+uid://ofqdyeqbeg4i
diff --git a/game/state_machine/abstract_state.tscn b/game/state_machine/abstract_state.tscn
new file mode 100644
index 0000000..f6a2f14
--- /dev/null
+++ b/game/state_machine/abstract_state.tscn
@@ -0,0 +1,6 @@
+[gd_scene format=3 uid="uid://cxdirjlkyccs4"]
+
+[ext_resource type="Script" uid="uid://ofqdyeqbeg4i" path="res://game/state_machine/abstract_state.gd" id="1_80326"]
+
+[node name="AbstractState" type="Node" unique_id=836520368]
+script = ExtResource("1_80326")
diff --git a/game/state_machine/state_machine.gd b/game/state_machine/state_machine.gd
new file mode 100644
index 0000000..ba670c4
--- /dev/null
+++ b/game/state_machine/state_machine.gd
@@ -0,0 +1,43 @@
+class_name StateMachine
+extends Node
+
+
+@export var initial_state: AbstractState
+
+
+var current_state : AbstractState
+
+
+func init() -> void:
+	_init_states()
+	if initial_state:
+		_change_state(initial_state)
+
+
+func process(delta: float) -> void:
+	if current_state:
+		current_state.process(delta)
+
+
+func physics_process(delta: float) -> void:
+	if current_state:
+		current_state.physics_process(delta)
+
+
+func _change_state(new_state: AbstractState) -> void:
+	if new_state == null: return
+	if new_state == current_state: return
+	
+	if current_state:
+		current_state.exit()
+	current_state = new_state
+	current_state.enter()
+
+
+func _init_states() -> void:
+	for child in get_children():
+		if not child is AbstractState: continue
+		var state := child as AbstractState
+		state.init()
+		state.switch_state.connect(_change_state)
+	
diff --git a/game/state_machine/state_machine.gd.uid b/game/state_machine/state_machine.gd.uid
new file mode 100644
index 0000000..0e9a58f
--- /dev/null
+++ b/game/state_machine/state_machine.gd.uid
@@ -0,0 +1 @@
+uid://cwd731cnbgann
diff --git a/game/state_machine/state_machine.tscn b/game/state_machine/state_machine.tscn
new file mode 100644
index 0000000..1a8c4d5
--- /dev/null
+++ b/game/state_machine/state_machine.tscn
@@ -0,0 +1,6 @@
+[gd_scene format=3 uid="uid://blxgfix54dxq3"]
+
+[ext_resource type="Script" uid="uid://cwd731cnbgann" path="res://game/state_machine/state_machine.gd" id="1_ncw1q"]
+
+[node name="StateMachine" type="Node" unique_id=560273456]
+script = ExtResource("1_ncw1q")