Added ItemLibrary Wrapper

PkmnLibSharp/Library/ItemLibrary.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using PkmnLibSharp.Utilities;
+
+namespace PkmnLibSharp.Library
+{
+    public class ItemLibrary : PointerWrapper
+    {
+        private readonly Dictionary<string, Item> _cache = new Dictionary<string, Item>(StringComparer.InvariantCultureIgnoreCase);
+        public ulong Count => Creatureliblibrary.Generated.ItemLibrary.GetCount(Ptr);
+
+        public void Insert(string key, Item item)
+        {
+            Creatureliblibrary.Generated.ItemLibrary.Insert(Ptr, key.ToPtr(), item.Ptr).Assert();
+            _cache.Add(key, item);
+        }
+
+        public void Delete(string key)
+        {
+            Creatureliblibrary.Generated.ItemLibrary.Delete(Ptr, key.ToPtr()).Assert();
+            _cache.Remove(key);
+        }
+
+        public bool TryGet(string key, out Item item)
+        {
+            if (_cache.TryGetValue(key, out item))
+                return true;
+            var ptr = IntPtr.Zero;
+            if (Creatureliblibrary.Generated.ItemLibrary.TryGet(Ptr, key.ToPtr(), ref ptr) != MarshalHelper.True) 
+                return false;
+            if (TryResolvePointer(ptr, out item))
+            {
+                _cache.Add(key, item);
+                return true;
+            }
+            item = new Item(ptr);
+            _cache.Add(key, item);
+            return true;
+        }
+
+        public Item Get(string key)
+        {
+            if (_cache.TryGetValue(key, out var item))
+                return item;
+            var ptr = IntPtr.Zero;
+            Creatureliblibrary.Generated.ItemLibrary.Get(Ptr, key.ToPtr(), ref ptr).Assert();
+            if (TryResolvePointer(ptr, out item))
+            {
+                _cache.Add(key, item);
+                return item;
+            }
+            item = new Item(ptr);
+            _cache.Add(key, item);
+            return item;
+        }
+
+        public ItemLibrary(ulong initialCapacity) : base(
+            Creatureliblibrary.Generated.ItemLibrary.Construct(initialCapacity))
+        {
+        }
+
+        protected override void DeletePtr()
+        {
+            Creatureliblibrary.Generated.ItemLibrary.Destruct(Ptr);
+        }
+
+    }
+}