refactor!: removed noise from class names

Renamed classes with names XBehaviour to X

Engine.Systems/Time/Stopwatch.cs

@@ -0,0 +1,98 @@
+using Syntriax.Engine.Core;
+
+namespace Syntriax.Engine.Systems.Time;
+
+public class Stopwatch : Behaviour, IUpdate, IStopwatch
+{
+    public Event<IReadOnlyStopwatch> OnStarted { get; } = new();
+    public Event<IReadOnlyStopwatch, IReadOnlyStopwatch.StopwatchDeltaArguments> OnDelta { get; } = new();
+    public Event<IReadOnlyStopwatch> OnStopped { get; } = new();
+    public Event<IReadOnlyStopwatch> OnPaused { get; } = new();
+    public Event<IReadOnlyStopwatch> OnResumed { get; } = new();
+
+    public double Time { get; protected set; } = 0f;
+    public TimerState State { get; protected set; } = TimerState.Idle;
+
+    private bool shouldBeTicking = false;
+    private bool hasStartedTickingBefore = false;
+
+    public virtual void Start()
+    {
+        Time = 0f;
+
+        shouldBeTicking = true;
+        hasStartedTickingBefore = false;
+
+        if (IsActive)
+            StartStopwatch();
+    }
+
+    public virtual void Stop()
+    {
+        if (!shouldBeTicking)
+            return;
+
+        shouldBeTicking = false;
+
+        State = TimerState.Stopped;
+        OnStopped?.Invoke(this);
+    }
+
+    public virtual void Update()
+    {
+        if (State is not TimerState.Ticking)
+            return;
+
+        double delta = Universe.Time.DeltaSpan.TotalSeconds;
+
+        Time += delta;
+        OnDelta?.Invoke(this, new(delta));
+    }
+
+    protected override void OnEnteredUniverse(IUniverse universe)
+    {
+        if (!shouldBeTicking || State is TimerState.Ticking)
+            return;
+
+        if (hasStartedTickingBefore)
+            Resume();
+        else
+            StartStopwatch();
+    }
+
+    protected override void OnExitedUniverse(IUniverse universe)
+    {
+        if (!shouldBeTicking || State is not TimerState.Ticking)
+            return;
+
+        Pause();
+    }
+
+    public virtual void Pause()
+    {
+        State = TimerState.Paused;
+        OnPaused?.Invoke(this);
+    }
+
+    public virtual void Resume()
+    {
+        State = TimerState.Ticking;
+        OnResumed?.Invoke(this);
+    }
+
+    private void StartStopwatch()
+    {
+        hasStartedTickingBefore = true;
+
+        State = TimerState.Ticking;
+        OnStarted?.Invoke(this);
+    }
+
+    protected override void OnFinalize()
+    {
+        Time = 0f;
+        State = TimerState.Idle;
+        shouldBeTicking = false;
+        hasStartedTickingBefore = false;
+    }
+}