AutoPriceUpdater/Plugin.cs

using BepInEx;
using BepInEx.Configuration;
using BepInEx.Logging;
using BepInEx.Unity.IL2CPP;
using HarmonyLib;
using Il2CppInterop.Runtime.Injection;
using Il2CppSystem.Collections.Generic;
using MyBox;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.SceneManagement;
using KeyCode = BepInEx.Unity.IL2CPP.UnityEngine.KeyCode;

namespace AutoPriceUpdater;

[BepInPlugin(PLUGIN_GUID, PLUGIN_NAME, PLUGIN_VERSION)]
public class Plugin : BasePlugin
{
    public const string PLUGIN_GUID = "de.mpburgmann.AutoPriceUpdater";
    public const string PLUGIN_NAME = "Auto Price Updater";
    public const string PLUGIN_VERSION = "1.1.0";
    public static new ManualLogSource Log;
    private static ConfigEntry<bool> EnableAutoUpdate;
    private static ConfigEntry<float> AmountToAdd;
    public static ConfigEntry<KeyCode> UpdateKey;
    private static List<DisplaySlot> m_CachedDisplaySlots = new List<DisplaySlot>(250);

    public override void Load()
    {
        Log = base.Log;
        Log.LogInfo($"Loading {PLUGIN_NAME} v{PLUGIN_VERSION}");

        Harmony harmony = new(PLUGIN_GUID);
        harmony.PatchAll();

        EnableAutoUpdate = Config.Bind("Settings", "Enabled", true, "If enabled, prices will be automatically updated at the start of each day.");
        UpdateKey = Config.Bind("Settings", "UpdateKey", KeyCode.F9, "Key to manually update prices. Not working when Enabled is false.");
        AmountToAdd = Config.Bind("Price Settings", "Amount To Add", 0.1f, "Amount to add to market price. Can be negative.");

        SceneManager.sceneLoaded += (UnityAction<Scene, LoadSceneMode>) OnSceneLoaded;
        Log.LogInfo($"{PLUGIN_NAME} loaded successfully");
    }

    public static void UpdatePrice()
    {
        if(!EnableAutoUpdate.Value) return;
        List<Pricing> pricesSetByPlayer = Singleton<SaveManager>.Instance.Price.PricesSetByPlayer;
        foreach (Pricing pricing in pricesSetByPlayer)
        {
            pricing.Price = pricing.MarketPrice + AmountToAdd.Value;
            Log.LogInfo($"Updated price for product ID {pricing.ProductID} to {pricing.Price}");
            if(Singleton<DisplayManager>.Instance.GetDisplaySlots(pricing.ProductID, false, m_CachedDisplaySlots) > 0)
            {
                foreach (DisplaySlot slot in m_CachedDisplaySlots)
                {
                    slot.PricingChanged(pricing.ProductID);
                }
            }
        }
        Singleton<SFXManager>.Instance.PlayCheckoutWarningSFX(Singleton<PlayerInstance>.Instance.transform.position);
    }

    public static void SetMissingPrices()
    {
        List<ProductSO> products = Singleton<IDManager>.Instance.Products;
        List<Pricing> pricesSetByPlayer = Singleton<SaveManager>.Instance.Price.PricesSetByPlayer;
        foreach (ProductSO product in products)
        {
            bool priceExists = false;
            foreach (Pricing pricing in pricesSetByPlayer)
            {
                if (pricing.ProductID == product.ID)
                {
                    priceExists = true;
                    break;
                }
            }
            if (!priceExists)
            {
                pricesSetByPlayer.Add(new Pricing(product.ID, product.BasePrice));
                Log.LogInfo($"Set missing price for product ID {product.ID} to base price {product.BasePrice}");
            }
        }
    }

    private static void OnSceneLoaded(Scene scene, LoadSceneMode mode)
    {
        if (scene.name == "Main Scene")
        {
            ClassInjector.RegisterTypeInIl2Cpp<Behaviour>();
            GameObject gameObject = new("AutoPriceUpdaterBehaviour");
            Object.DontDestroyOnLoad(gameObject);
            gameObject.AddComponent<Behaviour>();
        }

        if(scene.name == "Main Menu")
        {
            Object gameObject = GameObject.Find("AutoPriceUpdaterBehaviour");
            if(gameObject != null)
            {
                Object.Destroy(gameObject);
            }
        }
    }

    [HarmonyPatch(typeof(DayCycleManager), "StartNextDay")]
    private static class DayCycleManager_StartNextDay_Patch
    {
        [HarmonyPostfix]
        private static void Postfix()
        {
            Log.LogInfo("StartNextDay triggered");
            UpdatePrice();
        }
    }
}