Add Feature pt1

HorseIsleServer/LibHISP/Game/Services/Shop.cs

@@ -0,0 +1,72 @@
+using HISP.Game.Inventory;
+using HISP.Server;
+using HISP.Game.Items;
+using System;
+using System.Collections.Generic;
+
+namespace HISP.Game.Services
+{
+    public class Shop
+    {
+        public int Id;
+        public string[] BuysItemTypes;
+        public int BuyPricePercentage;
+        public int SellPricePercentage;
+        public ShopInventory Inventory;
+
+        public Shop(int[] infiniteStocks, int id)
+        {
+            this.Inventory = new ShopInventory(this);
+            this.Id = id;
+
+            foreach (int stock in infiniteStocks)
+            {
+                if (Item.ItemIdExist(stock))
+                    this.Inventory.AddInfinity(Item.GetItemById(stock));
+                else
+                    Logger.WarnPrint("Item ID: " + stock + " Does not exist.");
+            }
+
+            ItemInstance[] instances = Database.GetShopInventory(this.Id);
+            foreach (ItemInstance instance in instances)
+            {
+                this.Inventory.Add(instance, false);
+            }
+
+            Shop.ShopList.Add(this);
+        }
+        
+        public UInt64 CalculateBuyCost(Item.ItemInformation item)
+        {
+            return Convert.ToUInt64(Math.Round((double)item.SellPrice * (100.0 / (double)BuyPricePercentage)));
+        }
+        public UInt64 CalculateSellCost(Item.ItemInformation item)
+        {
+            return Convert.ToUInt64(Math.Round((double)item.SellPrice * (100.0 / (double)SellPricePercentage)));
+        }
+
+        public bool CanSell(Item.ItemInformation item)
+        {
+            foreach(string ItemType in BuysItemTypes)
+            {
+                if(ItemType == item.Type)
+                {
+                    return true;
+                }
+            }
+            return false;
+        }
+        // Static Functions 
+        public static List<Shop> ShopList = new List<Shop>();
+        public static Shop GetShopById(int id)
+        {
+            foreach(Shop shop in ShopList)
+            {
+                if (shop.Id == id)
+                    return shop;
+            }
+            throw new KeyNotFoundException("no shop with id: " + id + " found.");
+        }
+
+    }
+}