ItemLoot.cs

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using System;
using System.Collections.Generic;
using Terraria.GameContent.ItemDropRules;
 
namespace Terraria.ModLoader;
 
public readonly struct ItemLoot : ILoot
{
    private readonly int itemType;
 
    private readonly ItemDropDatabase itemDropDatabase;
 
    public ItemLoot(int itemType, ItemDropDatabase itemDropDatabase)
    {
        this.itemType = itemType;
        this.itemDropDatabase = itemDropDatabase;
    }
 
    public List<IItemDropRule> Get(bool includeGlobalDrops = true)
    {
        return itemDropDatabase.GetRulesForItemID(itemType);
    }
 
    public IItemDropRule Add(IItemDropRule entry)
    {
        return itemDropDatabase.RegisterToItem(itemType, entry);
    }
 
    public IItemDropRule Remove(IItemDropRule entry)
    {
        return itemDropDatabase.RemoveFromItem(itemType, entry);
    }
 
    public void RemoveWhere(Predicate<IItemDropRule> predicate, bool includeGlobalDrops = true)
    {
        foreach (IItemDropRule entry in Get())
        {
            if (predicate(entry))
            {
                Remove(entry);
            }
        }
    }
}