From bd5eb432b7ed8ae281ffb92e1241bfe4c420d0ad Mon Sep 17 00:00:00 2001
From: Syntriax <Syntriax@gmail.com>
Date: Wed, 30 Apr 2025 19:20:45 +0300
Subject: [PATCH] feat: serialized state machine & states

---
 Engine.Systems/StateMachine/IState.cs          |  6 +++---
 Engine.Systems/StateMachine/State.cs           | 18 ++++++++++++++++--
 .../StateMachine/StateBehaviourBase.cs         | 16 +++++++++++++++-
 Engine.Systems/StateMachine/StateMachine.cs    |  2 ++
 4 files changed, 36 insertions(+), 6 deletions(-)

diff --git a/Engine.Systems/StateMachine/IState.cs b/Engine.Systems/StateMachine/IState.cs
index b3bf3bf..e3bb49e 100644
--- a/Engine.Systems/StateMachine/IState.cs
+++ b/Engine.Systems/StateMachine/IState.cs
@@ -1,14 +1,14 @@
+using Syntriax.Engine.Core;
+
 namespace Syntriax.Engine.Systems.StateMachine;
 
-public interface IState
+public interface IState : IEntity, INameable
 {
     event StateUpdateEventHandler? OnStateUpdate;
     event StateTransitionedFromEventHandler? OnStateTransitionedFrom;
     event StateTransitionedToEventHandler? OnStateTransitionedTo;
     event StateTransitionReadyEventHandler? OnStateTransitionReady;
 
-    string Name { get; }
-
     IState? GetNextState();
 
     void Update();
diff --git a/Engine.Systems/StateMachine/State.cs b/Engine.Systems/StateMachine/State.cs
index 6f0583a..2afdff0 100644
--- a/Engine.Systems/StateMachine/State.cs
+++ b/Engine.Systems/StateMachine/State.cs
@@ -2,19 +2,33 @@ using Syntriax.Engine.Core;
 
 namespace Syntriax.Engine.Systems.StateMachine;
 
-public class State : IState
+public class State : BaseEntity, IState
 {
     public event IState.StateUpdateEventHandler? OnStateUpdate = null;
     public event IState.StateTransitionedFromEventHandler? OnStateTransitionedFrom = null;
     public event IState.StateTransitionedToEventHandler? OnStateTransitionedTo = null;
     public event IState.StateTransitionReadyEventHandler? OnStateTransitionReady = null;
+    public event INameable.NameChangedEventHandler? OnNameChanged = null;
 
     private readonly List<StateTransition> transitions = [];
     private readonly Dictionary<string, StateTransition> possibleTransitions = [];
+    private string _name = "Default State Name";
 
-    public string Name { get; set; } = "Default State Name";
     public IReadOnlyList<StateTransition> Transitions => transitions;
     public IReadOnlyDictionary<string, StateTransition> PossibleTransitions => possibleTransitions;
+    public string Name
+    {
+        get => _name;
+        set
+        {
+            if (_name.CompareTo(value) == 0)
+                return;
+
+            string previousName = _name;
+            _name = value;
+            OnNameChanged?.Invoke(this, previousName);
+        }
+    }
 
     public void RemoveTransition(string name)
     {
diff --git a/Engine.Systems/StateMachine/StateBehaviourBase.cs b/Engine.Systems/StateMachine/StateBehaviourBase.cs
index a33ebbe..e550a87 100644
--- a/Engine.Systems/StateMachine/StateBehaviourBase.cs
+++ b/Engine.Systems/StateMachine/StateBehaviourBase.cs
@@ -7,10 +7,24 @@ public abstract class StateBehaviourBase : Behaviour, IState
     public event IState.StateUpdateEventHandler? OnStateUpdate = null;
     public event IState.StateTransitionedFromEventHandler? OnStateTransitionedFrom = null;
     public event IState.StateTransitionedToEventHandler? OnStateTransitionedTo = null;
+    public event INameable.NameChangedEventHandler? OnNameChanged = null;
 
     public abstract event IState.StateTransitionReadyEventHandler? OnStateTransitionReady;
 
-    public abstract string Name { get; }
+    private string _name = string.Empty;
+    public string Name
+    {
+        get => _name;
+        set
+        {
+            if (_name.CompareTo(value) == 0)
+                return;
+
+            string previousName = _name;
+            _name = value;
+            OnNameChanged?.Invoke(this, previousName);
+        }
+    }
 
     protected virtual void OnUpdateState() { }
     public void Update()
diff --git a/Engine.Systems/StateMachine/StateMachine.cs b/Engine.Systems/StateMachine/StateMachine.cs
index 02fb3a7..8c262e5 100644
--- a/Engine.Systems/StateMachine/StateMachine.cs
+++ b/Engine.Systems/StateMachine/StateMachine.cs
@@ -1,4 +1,5 @@
 using Syntriax.Engine.Core;
+using Syntriax.Engine.Core.Serialization;
 
 namespace Syntriax.Engine.Systems.StateMachine;
 
@@ -7,6 +8,7 @@ public class StateMachine : Behaviour
     public event StateChangedEventHandler? OnStateChanged = null;
 
     private IState _state = new State();
+    [Serialize]
     public IState State
     {
         get => _state;