ItemTrader.cs

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using System.Collections.Generic;
 
namespace Terraria.GameContent;
 
public class ItemTrader
{
    public class TradeOption
    {
        public int TakingItemType;
 
        public int TakingItemStack;
 
        public int GivingITemType;
 
        public int GivingItemStack;
 
        public bool WillTradeFor(int offeredItemType, int offeredItemStack)
        {
            if (offeredItemType != TakingItemType || offeredItemStack < TakingItemStack)
            {
                return false;
            }
            return true;
        }
    }
 
    public static ItemTrader ChlorophyteExtractinator = CreateChlorophyteExtractinator();
 
    private List<TradeOption> _options = new List<TradeOption>();
 
    public void AddOption_Interchangable(int itemType1, int itemType2)
    {
        AddOption_OneWay(itemType1, 1, itemType2, 1);
        AddOption_OneWay(itemType2, 1, itemType1, 1);
    }
 
    public void AddOption_CyclicLoop(params int[] typesInOrder)
    {
        for (int i = 0; i < typesInOrder.Length - 1; i++)
        {
            AddOption_OneWay(typesInOrder[i], 1, typesInOrder[i + 1], 1);
        }
        AddOption_OneWay(typesInOrder[typesInOrder.Length - 1], 1, typesInOrder[0], 1);
    }
 
    public void AddOption_FromAny(int givingItemType, params int[] takingItemTypes)
    {
        for (int i = 0; i < takingItemTypes.Length; i++)
        {
            AddOption_OneWay(takingItemTypes[i], 1, givingItemType, 1);
        }
    }
 
    public void AddOption_OneWay(int takingItemType, int takingItemStack, int givingItemType, int givingItemStack)
    {
        _options.Add(new TradeOption
        {
            TakingItemType = takingItemType,
            TakingItemStack = takingItemStack,
            GivingITemType = givingItemType,
            GivingItemStack = givingItemStack
        });
    }
 
    public bool TryGetTradeOption(Item item, out TradeOption option)
    {
        option = null;
        int type = item.type;
        int stack = item.stack;
        for (int i = 0; i < _options.Count; i++)
        {
            TradeOption tradeOption = _options[i];
            if (tradeOption.WillTradeFor(type, stack))
            {
                option = tradeOption;
                return true;
            }
        }
        return false;
    }
 
    public static ItemTrader CreateChlorophyteExtractinator()
    {
        ItemTrader itemTrader = new ItemTrader();
        itemTrader.AddOption_Interchangable(12, 699);
        itemTrader.AddOption_Interchangable(11, 700);
        itemTrader.AddOption_Interchangable(14, 701);
        itemTrader.AddOption_Interchangable(13, 702);
        itemTrader.AddOption_Interchangable(56, 880);
        itemTrader.AddOption_Interchangable(364, 1104);
        itemTrader.AddOption_Interchangable(365, 1105);
        itemTrader.AddOption_Interchangable(366, 1106);
        itemTrader.AddOption_CyclicLoop(134, 137, 139);
        itemTrader.AddOption_Interchangable(20, 703);
        itemTrader.AddOption_Interchangable(22, 704);
        itemTrader.AddOption_Interchangable(21, 705);
        itemTrader.AddOption_Interchangable(19, 706);
        itemTrader.AddOption_Interchangable(57, 1257);
        itemTrader.AddOption_Interchangable(381, 1184);
        itemTrader.AddOption_Interchangable(382, 1191);
        itemTrader.AddOption_Interchangable(391, 1198);
        itemTrader.AddOption_Interchangable(86, 1329);
        itemTrader.AddOption_FromAny(3, 61, 836, 409);
        itemTrader.AddOption_FromAny(169, 370, 1246, 408);
        itemTrader.AddOption_FromAny(664, 833, 835, 834);
        itemTrader.AddOption_FromAny(3271, 3276, 3277, 3339);
        itemTrader.AddOption_FromAny(3272, 3274, 3275, 3338);
        return itemTrader;
    }
}