Track LocalMods as part of monolith

LocalMods/More Level Content/CSharp/Shared/Generation/Defs/DifficultyRange.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Text.RegularExpressions;
+
+namespace MoreLevelContent.Shared.Generation
+{
+    public struct DifficultyRange
+    {
+        public float MinDiff;
+        public float MaxDiff;
+
+        private static readonly Regex diffRegex = new Regex("diff_([0-9.]+)-([0-9.]+)");
+
+        public DifficultyRange(float min, float max)
+        {
+            MinDiff = min;
+            MaxDiff = max;
+        }
+
+        public DifficultyRange(string name)
+        {
+            Match match = diffRegex.Match(name);
+            // Exit if the sub has no difficulty range defined
+            if (match.Groups.Count < 2)
+            {
+                MinDiff = 0;
+                MaxDiff = 0;
+                Log.Warn($"Element with name {name} has no diff range defined. Will only spawn when at 0% diff!");
+                return;
+            }
+            string diffStr1 = match.Groups[1].Value;
+            string diffStr2 = match.Groups[2].Value;
+
+            MinDiff = float.Parse(diffStr1);
+            MaxDiff = float.Parse(diffStr2);
+        }
+
+        public override string ToString() => $"{MinDiff} - {MaxDiff}";
+
+        public bool IsInRangeOf(float diff) => MinDiff <= diff && diff < MaxDiff;
+    }
+}