fix: Updates races to properly support gargoyle equipment. (#744)

* Adds `RaceFlag` to the `Race` object. This is `1 << RaceIndex`
* Replaces `RequiredRace`  with `RequiredRaces` for items.
* Adds convenience flags for `RequiredRaces`
  ```cs
  
  public const int AllowAllRaces = 0x7;      // Race.Human.RaceFlag | Race.Elf.RaceFlag | Race.Gargoyle.RaceFlag
  public const int AllowHumanOrElves = 0x3;  // Race.Human.RaceFlag | Race.Elf.RaceFlag
  public const int AllowElvesOnly = 0x2;     // Race.Elf.RaceFlag
  public const int AllowGargoylesOnly = 0x4; // Race.Gargoyle.RaceFlag
  ```
* Example usage on an item:
  ```cs
  public override int RequiredRaces => Race.AllowHumanOrElves;
  ```
* Adds Wood and Stone armor material types
* Updates Woodland armor to Wood
* Adds proper messaging for race restrictions
* Adds gargoyle only for object properties
* Adds `CheckRace` functions for validating if a race or mobile can use the item:
  ```cs
  bool CheckRace(Race race);
  bool CheckRace(Mobile from, bool message = true);
  ```

Projects/Server/Items/Item.cs

@@ -2104,6 +2104,47 @@ namespace Server
 
         public virtual bool CheckConflictingLayer(Mobile m, Item item, Layer layer) => m_Layer == layer;
 
+        // Uses Race.RaceFlag
+        public virtual int RequiredRaces => Race.AllowAllRaces;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool CheckRace(Race race) => Race.IsAllowedRace(race, RequiredRaces);
+
+        public bool CheckRace(Mobile from, bool message = true)
+        {
+            var race = from.Race;
+            var requiredRaces = RequiredRaces;
+
+            if (Race.IsAllowedRace(race, requiredRaces))
+            {
+                return true;
+            }
+
+            if (!message)
+            {
+                return false;
+            }
+
+            if (race == Race.Gargoyle)
+            {
+                from.LocalOverheadMessage(MessageType.Regular, 0x3B2, 1111708); // Gargoyles can't wear this.
+            }
+            else if (requiredRaces == Race.AllowGargoylesOnly)
+            {
+                from.LocalOverheadMessage(Network.MessageType.Regular, 0x3B2, 1111707); // Only gargoyles can wear this.
+            }
+            else if (race != Race.Elf)
+            {
+                from.SendLocalizedMessage(1072203); // Only Elves may use this.
+            }
+            else if (race != Race.Human)
+            {
+                from.SendMessage($"Only {race.PluralName} may use this.");
+            }
+
+            return false;
+        }
+
         public virtual bool CanEquip(Mobile m) => m_Layer != Layer.Invalid && m.FindItemOnLayer(m_Layer) == null;
 
         public virtual void GetChildContextMenuEntries(Mobile from, List<ContextMenuEntry> list, Item item)

Projects/Server/Race.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Runtime.CompilerServices;
 
 namespace Server
 {
@@ -16,6 +17,7 @@ namespace Server
         {
             RaceID = raceID;
             RaceIndex = raceIndex;
+            RaceFlag = 1 << raceIndex;
 
             Name = name;
 
@@ -38,6 +40,11 @@ namespace Server
 
         public static List<Race> AllRaces { get; } = new();
 
+        public const int AllowAllRaces = 0x7;      // Race.Human.RaceFlag | Race.Elf.RaceFlag | Race.Gargoyle.RaceFlag
+        public const int AllowHumanOrElves = 0x3;  // Race.Human.RaceFlag | Race.Elf.RaceFlag
+        public const int AllowElvesOnly = 0x2;     // Race.Elf.RaceFlag
+        public const int AllowGargoylesOnly = 0x4; // Race.Gargoyle.RaceFlag
+
         public Expansion RequiredExpansion { get; }
 
         public int MaleBody { get; }
@@ -52,10 +59,15 @@ namespace Server
 
         public int RaceIndex { get; }
 
+        public int RaceFlag { get; }
+
         public string Name { get; set; }
 
         public string PluralName { get; set; }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool IsAllowedRace(Race race, int allowedRaceFlags) => (allowedRaceFlags & race.RaceFlag) != 0;
+
         public static string[] GetRaceNames()
         {
             CheckNamesAndValues();