Reorganizes Project (#41)

Projects/Scripts/Engines/MyRunUO/LayerComparer.cs

@@ -0,0 +1,84 @@
+using System.Collections.Generic;
+
+namespace Server.Engines.MyRunUO
+{
+  public class LayerComparer : IComparer<Item>
+  {
+    private static Layer PlateArms = (Layer)255;
+    private static Layer ChainTunic = (Layer)254;
+    private static Layer LeatherShorts = (Layer)253;
+
+    private static Layer[] m_DesiredLayerOrder =
+    {
+      Layer.Cloak,
+      Layer.Bracelet,
+      Layer.Ring,
+      Layer.Shirt,
+      Layer.Pants,
+      Layer.InnerLegs,
+      Layer.Shoes,
+      LeatherShorts,
+      Layer.Arms,
+      Layer.InnerTorso,
+      LeatherShorts,
+      PlateArms,
+      Layer.MiddleTorso,
+      Layer.OuterLegs,
+      Layer.Neck,
+      Layer.Waist,
+      Layer.Gloves,
+      Layer.OuterTorso,
+      Layer.OneHanded,
+      Layer.TwoHanded,
+      Layer.FacialHair,
+      Layer.Hair,
+      Layer.Helm,
+      Layer.Talisman
+    };
+
+    public static readonly IComparer<Item> Instance = new LayerComparer();
+
+    static LayerComparer()
+    {
+      TranslationTable = new int[256];
+
+      for (int i = 0; i < m_DesiredLayerOrder.Length; ++i)
+        TranslationTable[(int)m_DesiredLayerOrder[i]] = m_DesiredLayerOrder.Length - i;
+    }
+
+    public static int[] TranslationTable{ get; }
+
+    public int Compare(Item a, Item b)
+    {
+      if (a == null)
+        return b == null ? 0 : 1;
+      
+      if (b == null)
+        return -1;
+      
+      Layer aLayer = Fix(a.ItemID, a.Layer);
+      Layer bLayer = Fix(b.ItemID, b.Layer);
+
+      return TranslationTable[(int)bLayer] - TranslationTable[(int)aLayer];
+    }
+
+    public static bool IsValid(Item item)
+    {
+      return TranslationTable[(int)item.Layer] > 0;
+    }
+
+    public Layer Fix(int itemID, Layer oldLayer)
+    {
+      if (itemID == 0x1410 || itemID == 0x1417) // platemail arms
+        return PlateArms;
+
+      if (itemID == 0x13BF || itemID == 0x13C4) // chainmail tunic
+        return ChainTunic;
+
+      if (itemID == 0x1C08 || itemID == 0x1C09 || itemID == 0x1C00 || itemID == 0x1C01) // leather skirt/shorts
+        return LeatherShorts;
+
+      return oldLayer;
+    }
+  }
+}