From 329a942de7cf744bb831bb0b68694e0489844696 Mon Sep 17 00:00:00 2001
From: Gabriel Kaszewski <gabrielkaszewski@gmail.com>
Date: Mon, 13 Oct 2025 18:29:58 +0200
Subject: [PATCH] Add inventory and pickup components with associated resources
 and presenters

---
 Code/Factories/ComponentFactory.cs           | 13 ++++++
 Code/Presenters/GamePresenter.cs             |  3 ++
 Code/Presenters/PickupPresenter.cs           | 43 ++++++++++++++++++++
 Code/Resources/InventoryComponentResource.cs |  9 ++++
 Code/Resources/PickupComponentResource.cs    | 11 +++++
 5 files changed, 79 insertions(+)
 create mode 100644 Code/Presenters/PickupPresenter.cs
 create mode 100644 Code/Resources/InventoryComponentResource.cs
 create mode 100644 Code/Resources/PickupComponentResource.cs

diff --git a/Code/Factories/ComponentFactory.cs b/Code/Factories/ComponentFactory.cs
index df4bc22..458b11d 100644
--- a/Code/Factories/ComponentFactory.cs
+++ b/Code/Factories/ComponentFactory.cs
@@ -6,6 +6,7 @@ using GameCore.Attributes;
 using GameCore.Combat;
 using GameCore.ECS.Interfaces;
 using GameCore.Input;
+using GameCore.Inventory;
 using GameCore.Movement;
 using GameCore.Physics;
 using GameCore.Player;
@@ -29,6 +30,8 @@ public class ComponentFactory
         Register<PlayerComponentResource>(_ => new PlayerComponent());
         Register<RotationComponentResource>(_ => new RotationComponent());
         Register<CharacterStateComponentResource>(_ => new CharacterStateComponent());
+        Register<InventoryComponentResource>(_ => new InventoryComponent());
+        Register<PickupComponentResource>(CreatePickupComponent);
     }
 
     public IComponent Create(Resource resource)
@@ -77,4 +80,14 @@ public class ComponentFactory
             Lifetime = resource.Lifetime,
         };
     }
+
+    private PickupComponent CreatePickupComponent(PickupComponentResource resource)
+    {
+        return new PickupComponent
+        {
+            ItemId = resource.ItemId,
+            Quantity = resource.Quantity,
+            IsInstantUse = resource.IsInstantUse
+        };
+    }
 }
\ No newline at end of file
diff --git a/Code/Presenters/GamePresenter.cs b/Code/Presenters/GamePresenter.cs
index bfb71ba..2f82626 100644
--- a/Code/Presenters/GamePresenter.cs
+++ b/Code/Presenters/GamePresenter.cs
@@ -10,6 +10,7 @@ using GameCore.ECS;
 using GameCore.ECS.Interfaces;
 using GameCore.Events;
 using GameCore.Input;
+using GameCore.Inventory;
 using GameCore.Movement;
 using Godot;
 
@@ -54,6 +55,8 @@ public partial class GamePresenter : Node
         _world.RegisterSystem(new JumpSystem());
         
         _world.RegisterSystem(new AttributeSystem());
+        _world.RegisterSystem(new PickupSystem());
+        _world.RegisterSystem(new InventorySystem(_world));
         
         _world.RegisterSystem(new WeaponSystem());
         _world.RegisterSystem(new ProjectileSystem());
diff --git a/Code/Presenters/PickupPresenter.cs b/Code/Presenters/PickupPresenter.cs
new file mode 100644
index 0000000..a8959bb
--- /dev/null
+++ b/Code/Presenters/PickupPresenter.cs
@@ -0,0 +1,43 @@
+using CryptonymThunder.Code.Autoloads;
+using GameCore.ECS;
+using GameCore.ECS.Interfaces;
+using GameCore.Physics;
+using Godot;
+
+namespace CryptonymThunder.Code.Presenters;
+
+public partial class PickupPresenter : Area3D, IEntityPresenter, IPresenterComponent
+{
+    private World _world;
+    private PresenterRegistry _presenterRegistry;
+    public Entity CoreEntity { get; set; }
+
+    public override void _Ready()
+    {
+        BodyEntered += OnBodyEnter;
+    }
+
+    private void OnBodyEnter(Node3D body)
+    {
+        if (_presenterRegistry.TryGetEntity(body.GetInstanceId(), out var hitEntity))
+        {
+            _world.AddComponent(hitEntity, new CollisionEventComponent(CoreEntity));
+        }
+    }
+
+    public void Initialize(Entity coreEntity, World world)
+    {
+        CoreEntity = coreEntity;
+        _world = world;
+        _presenterRegistry = GetNode<PresenterRegistry>("/root/PresenterRegistry");
+        BodyEntered += OnBodyEnter;
+    }
+
+    public void SyncToPresentation(float delta)
+    {
+    }
+
+    public void SyncToCore(float delta)
+    {
+    }
+}
\ No newline at end of file
diff --git a/Code/Resources/InventoryComponentResource.cs b/Code/Resources/InventoryComponentResource.cs
new file mode 100644
index 0000000..cdcd51d
--- /dev/null
+++ b/Code/Resources/InventoryComponentResource.cs
@@ -0,0 +1,9 @@
+using Godot;
+
+namespace CryptonymThunder.Code.Resources;
+
+[GlobalClass]
+public partial class InventoryComponentResource : Resource
+{
+    
+}
\ No newline at end of file
diff --git a/Code/Resources/PickupComponentResource.cs b/Code/Resources/PickupComponentResource.cs
new file mode 100644
index 0000000..088b5db
--- /dev/null
+++ b/Code/Resources/PickupComponentResource.cs
@@ -0,0 +1,11 @@
+using Godot;
+
+namespace CryptonymThunder.Code.Resources;
+
+[GlobalClass]
+public partial class PickupComponentResource : Resource
+{
+    [Export] public string ItemId { get; set; }
+    [Export] public int Quantity { get; set; } = 1;
+    [Export] public bool IsInstantUse { get; set; } = false;
+}
\ No newline at end of file