brick-framework/GameCore/Inventory/InventorySystem.cs

using GameCore.ECS;
using GameCore.ECS.Interfaces;
using GameCore.Events;

namespace GameCore.Inventory;

public class InventorySystem : ISystem
{
    private readonly World _world;

    public InventorySystem(World world)
    {
        _world = world;
        _world.Subscribe<AddItemToInventoryEvent>(OnAddItem);
    }

    public void Update(World world, float deltaTime)
    {
    }

    private void OnAddItem(AddItemToInventoryEvent e)
    {
        var inventory = _world.GetComponent<InventoryComponent>(e.Target);
        if (inventory == null) return;
        inventory.AddItem(e.Item);

        var newQuantity = inventory.GetItemCount(e.Item.ItemId);
        _world.PublishEvent(new InventoryItemChangedEvent(e.Target, e.Item.ItemId, newQuantity));
    }
}