Implementing a custom alert - double loading issue

[Duncan]

I am trying to implement a custom alert (relates to bug report https://ludeon.com/forums/index.php?topic=30217.0).

I realised I don't need to modify the existing alert but could just add an additional alert in that covers pawns in medical beds. I implemented a new alert with the following code:

Code Select Expand

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using RimWorld;
using UnityEngine;
using Verse;

namespace Medical_Alert
{
    public class Alert_ColonistNeedsTendInBed : Alert
    {
        private IEnumerable<Pawn> NeedingColonists
        {
            get
            {
                return
                    from p in PawnsFinder.AllMaps_FreeColonistsAndPrisoners
                    where (HealthAIUtility.ShouldBeTendedNow(p) && RestUtility.InBed(p) && RestUtility.CurrentBed(p).Medical)
                    select p;
            }
        }

        public Alert_ColonistNeedsTendInBed()
        {
            this.defaultLabel = "ColonistNeedsTreatment".Translate();
            this.defaultPriority = AlertPriority.High;
        }

        public override string GetExplanation()
        {
            StringBuilder stringBuilder = new StringBuilder();
            foreach (Pawn current in this.NeedingColonists)
            {
                stringBuilder.AppendLine("    " + current.NameStringShort);
            }
            return string.Format("ColonistNeedsTreatmentDesc".Translate(), stringBuilder.ToString());
        }

        public override AlertReport GetReport()
        {
            Pawn pawn = this.NeedingColonists.FirstOrDefault<Pawn>();
            if (pawn == null)
            {
                return false;
            }
            return AlertReport.CulpritIs(pawn);
        }
    }
}


This does not work at all however. Not only does the alert not show up, I get a whole series of other issues:

• "<something> already has short hash" errors on start
• Unable to select a start region after world generation
• (On load save) all vanilla alerts are shown twice on the alert list

I looked around for mods implementing similar functionality to see if I had missed anything and found this one: https://github.com/Aeryl/TempGauge/blob/master/Source/TempGauge/Alert_TemperatureGauge.cs

I can not see any major differences. Yet my mod seems to trigger multiple parts of the game to be loaded twice.

Anyone know what is going on here?