Refactor GameManager session state handling and add new components: CanBeLaunchedComponent, IceEffectComponent, JumpPadComponent, KillPlayerOutOfScreenComponent, KnockbackComponent, LifetimeComponent, MagneticSkillComponent, OutOfScreenComponent, PeriodicShootingComponent, PlayerDeathComponent, ProgressiveDamageComponent, ProjectileComponent, ProjectileInitComponent, RequirementComponent, ScoreComponent, ShipMovementComponent, ShipShooterComponent, and SideToSideMovementComponent

scripts/components/KnockbackComponent.cs

@@ -0,0 +1,48 @@
+using Godot;
+
+namespace Mr.BrickAdventures.scripts.components;
+
+public partial class KnockbackComponent : Node
+{
+    [Export] public CharacterBody2D Body { get; set; }
+    [Export] public float KnockbackForce { get; set; } = 25f;
+    [Export] public HealthComponent HealthComponent { get; set; }
+
+    private bool _knockbackMode = false;
+    private int _knockbackFrames = 0;
+
+    public override void _Ready()
+    {
+        HealthComponent.HealthChanged += OnHealthChanged;
+    }
+
+    public override void _Process(double delta)
+    {
+        if (_knockbackMode) _knockbackFrames++;
+
+        if (_knockbackFrames <= 1) return;
+        
+        _knockbackMode = false;
+        _knockbackFrames = 0;
+    }
+
+    public override void _PhysicsProcess(double delta)
+    {
+        if (_knockbackMode) ApplyKnockback((float)delta);
+    }
+    
+    private void OnHealthChanged(float delta, float totalHealth)
+    {
+        if (totalHealth <= 0f || delta >= 0f) return;
+        
+        _knockbackMode = true;
+    }
+
+    private void ApplyKnockback(float delta)
+    {
+        var velocity = Body.Velocity.Normalized();
+        var knockbackDirection = new Vector2(Mathf.Sign(velocity.X), 0.4f);
+        var knockbackVector = -knockbackDirection * KnockbackForce * delta;
+        Body.Velocity += knockbackVector;
+    }
+}