Add shuttle handler

NewHorizons/Handlers/ShuttleHandler.cs

@@ -0,0 +1,42 @@
+using NewHorizons.Utility;
+using OWML.Common;
+using OWML.Utils;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEngine;
+using Logger = NewHorizons.Utility.Logger;
+
+namespace NewHorizons.Handlers
+{
+    public static class ShuttleHandler
+    {
+        public static NomaiShuttleController.ShuttleID GetShuttleID(string id)
+        {
+            try
+            {
+                NomaiShuttleController.ShuttleID shuttleID;
+                if (EnumUtils.TryParse<NomaiShuttleController.ShuttleID>(id, out shuttleID))
+                {
+                    return shuttleID;
+                }
+                else
+                {
+                    return AddCustomShuttleID(id);
+                }
+            }
+            catch (Exception e)
+            {
+                Logger.LogError($"Couldn't load shuttle id [{id}]:\n{e}");
+                return EnumUtils.FromObject<NomaiShuttleController.ShuttleID>(-1);
+            }
+        }
+
+        public static NomaiShuttleController.ShuttleID AddCustomShuttleID(string id)
+        {
+            Logger.LogVerbose($"Registering new shuttle id [{id}]");
+
+            return EnumUtilities.Create<NomaiShuttleController.ShuttleID>(id);
+        }
+    }
+}