Rizu/Rizu.BepInEx/PatchUserDetail.cs

using HarmonyLib;
using Manager.UserDatas;
using Rizu.Core;

namespace Rizu.BepInEx;

[HarmonyPatch(typeof(UserDetail))]
public class PatchUserDetail
{
    // ReSharper disable once InconsistentNaming
    [HarmonyPatch(nameof(UserDetail.CourseRank), MethodType.Setter)]
    [HarmonyPrefix]
    private static bool CourseRankPrefix(UserDetail __instance, ref uint value)
    {
        var previousValue = __instance.CourseRank;
        
        // Don't send an import if it's the same rank
        if (value == previousValue || value == 0)
        {
            return true;
        }

        RizuPlugin.Instance.StartCoroutine(Exporter.Instance.ExportDan(__instance));
        
        return true;
    }
}